• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    contribution regulation of secondary energy sources to a power grid. The present invention relates to an energy storage medium which is combined with a secondary energy source that provides power to an electricity distribution grid. The loading and unloading behavior of the energy storage medium is controlled so that rapid increases in output of a secondary power source are absorbed by the storage system, while rapid decreases in output of the secondary source are compensated for by the discharge of stored energy over the storage system. grid. The combined contributions from the secondary source and the energy storage system ensures a rate of change that does not exceed a set level. Maximum and minimum output power levels for the secondary source can be set to define a normal operating range. Loading or unloading of the energy storage system is also performed when the secondary output power level exceeds or is below the limits of the defined range.
    公开号:BR112012022923B1
    申请号:R112012022923-0
    申请日:2011-03-10
    公开日:2019-11-26
    发明作者:Jay Geinzer；Christopher J. Shelton；Steven Meersman
    申请人:The Aes Corporation；
    IPC主号:
    专利说明:

    TECHNICAL FIELD [001] The present invention relates to the use of secondary sources to contribute electrical energy to a power distribution grid, and more specifically to regulate the general power supplied to the grid by such sources, as well as the instantaneous increase or reduction such power.
    BACKGROUND [002] Typically, a public service obtains electrical power from one or more primary power generation sources, such as hydroelectric, gas, coal and / or nuclear power plants for delivery to customers via a grid. of distribution. The power supplied by these sources is relatively constant, and can be easily regulated to satisfy customers' demands while at the same time conforming to the standards for such power, such as rated voltage and frequency levels. To supplement the power supplied by these primary sources, it has become very common to connect secondary sources of power, such as solar panels and windmills, to the distribution grid. Among other advantages, these secondary forms of energy are renewable, in contrast to nuclear sources, coal and gas, and can also help to reduce the emission of greenhouse gases that adversely affect climatic conditions.
    [003] When a secondary power source is connected to the grid, the public service operator expects its contribution to be at certain levels, so that it can be properly accounted for, and the outputs of the primary sources adjusted to
    Petition 870190077312, of 08/09/2019, p. 5/32
    2/17 compliance. Unlike the relatively stable output from primary sources, however, the amount of energy produced by secondary sources can vary over a wide range at relatively short intervals, for example, measured in seconds. For example, the output of a solar panel varies not only according to the time of day, but also as a result of weather events such as the passing and sudden appearance of clouds that block direct sunlight. Likewise, the exit of a windmill farm is subject to instant pauses and gusts in the speed of the wind.
    [004] A sudden drop in output from a secondary source is absorbed by the grid, and needs to be accommodated by increasing the output from one or more of the primary sources. On the other hand, a sudden growth in the secondary output can exceed the transmission capacities of the equipment on site, resulting in a loss of power generated until the primary source can be restricted. These sudden changes limit the effective contribution of secondary power sources within the entire source fleet. The greater the number of secondary sources that are used, the greater the variation in power supplied, which results in reduced reliability for such sources, and / or the need for primary units of rapid response. This latter requirement induces additional costs at primary power plants, such as increased maintenance requirements and additional fuel costs associated with operating at a non-optimal setpoint.
    [005] Large voltage fluctuations can also exceed the response capabilities of the distribution system to normal operation. Traditional power generation equipment can often not respond quickly enough to sudden changes, which attempting to do so incurs maintenance and fuel costs
    Petition 870190077312, of 08/09/2019, p. 6/32
    3/17 extras.
    SUMMARY [006] According to revealed modalities of the present invention, these concerns are addressed by controlling the loading and unloading behavior of one or more energy storage systems coupled energetically to the electricity grid, in such a way that rapid increases at the outlet of a secondary source of energy they are absorbed by the storage system, while rapid decreases at the outlet of the secondary source are compensated by discharging energy stored in the grid. In fact, energy storage systems moderate, or mask, variations in output from the secondary source, so that the power delivered to and through the grid can be reliably maintained at the appropriate level.
    [007] The loading and unloading of the energy storage system can be controlled so that the combined contributions of the secondary source and the energy storage system guarantee a rate of change that does not exceed a defined level. Maximum and minimum output power levels for the secondary source can be set to define a normal operating range. The charging or discharging of the energy storage system is carried out only when the secondary power output level exceeds or is below the limits of the defined range.
    [008] A better understanding of the principles and advantages of the present invention can be gained by referring to the following detailed description and the accompanying drawings.
    BRIEF DESCRIPTION OF THE DRAWINGS [009] Figure 1 is a plan illustrating the power output of a secondary energy source in relation to a desired power band.
    Petition 870190077312, of 08/09/2019, p. 7/32
    4/17 [0010] Figures 2A to 2C are time plans that illustrate the results achieved according to the invention.
    [0011] Figure 3 is a general block diagram of an energy storage system connected to the power grid that is controlled to regulate, among other factors, the rate of change in output of a secondary energy source.
    [0012] Figure 4 is a more detailed block diagram of the control module for regulating the output power of a secondary energy source.
    [0013] Figures 5, 6, 7 and 8A to 8B are flowcharts that illustrate a method of controlling an energy storage system to regulate the rate of change in the output of a secondary energy source.
    DETAILED DESCRIPTION [0014] To facilitate an understanding of the principles underlying the present invention, exemplary modalities are described below with reference to the use of a solar energy conversion device, for example, photovoltaic panels, as the secondary source. It will be appreciated that the practical applications of the invention are not limited to this example, and that it can be used in any environment where it is desirable to attenuate rapid fluctuations at the output of a power source.
    [0015] Figure 1 is a plan of the type of situation to which the present invention applies. For a given period of a day, for example, at a given time, the utility operator predicts a certain amount of power output from solar panels that are connected to a power distribution grid. Taking into account the grid's ability to absorb variations, upper and lower limits 10 and 12 can be established for that period of time, to define a range, or band, of output power
    Petition 870190077312, of 08/09/2019, p. 8/32
    5/17 acceptable solar panels. This range can vary as a function of time factors, such as the time of day, the day of the month and / or the month of the year, to account for changes in the position of the sun. Alternatively, or in addition, it may be a function of geographical parameters that influence the output of a secondary source, such as solar insolation, wind speed, etc. These parameters can be based on estimates derived from historical data, or measurements in real time.
    [0016] Line 13 represents the actual power levels that can be produced by the solar panels during that period of time. Although the average output for that period may be within the desired band, the instantaneous value can vary widely and quickly, resulting in peaks 14 that exceed the upper limit 10, and valleys 16 that are below the lower limit 12. In addition, the instantaneous rate of increase 18, or rate of decrease 20, may exceed values that the grid is capable of absorbing, even when the actual power level is within the desired band. Since the primary power generation source (s) may not be able to react quickly to combat the effects of these peaks, valleys, and high rates of rise or decline, levels of power in the distribution grid may deviate from the desired level.
    [0017] To alleviate the impact that such power fluctuations can have on the distribution grid, an energy storage system is combined with the solar energy conversion device to reduce the response required from primary sources and costs subsequently incurred, mitigating them if the changes in the output of the solar panels. A drop in the output of the solar panels below the desired band is counteracted by releasing energy from the storage system in the grid, and a rise in the output beyond the upper limit 10 is compensated by diverting some or all of the excess energy
    Petition 870190077312, of 08/09/2019, p. 9/32
    6/17 for the storage system. In addition, when solar panels are operating within the desired band, storage devices can be charged or discharged to keep the stored energy at an optimal level to absorb the next large variation in solar panel output, while at the same time attenuating if any high rates of increase or decrease in output power.
    [0018] The effect achieved by combining an energy storage device, such as batteries, with solar panels is illustrated in the time plans of Figures 2A to 2C. Figure 2A illustrates the situation where the instantaneous increase in the output power of the solar panels over a period of ti-1 to ti is greater than the maximum acceptable ramp rate. In this case, the battery storage system is activated to charge the batteries, which means that part of the solar panels' output power is absorbed by the batteries. As a result, the net output power to the grid during that time period remains within the acceptable ramp rate.
    [0019] Figure 2B illustrates the conversion situation, in which the output power of the solar panels is at a rate that exceeds the maximum acceptable rate. In this case, the batteries discharge to supply additional power to the grid during the period of time, so that the net change from the previous period is reduced, and thus remains within the allowable rate of change.
    [0020] In the example of Figure 2C, a desired band for power over the course of a day is defined by upper and lower limits 10 and 12, which vary according to the time of day. When the actual output power of the solar panels exceeds the upper limit for part of the day, the excess power is absorbed by the batteries, so that the net power supplied to the grid is limited to the quantity 870190077312, of 08/09/2019, p. . 10/32
    A dity illustrated by the line segment in bold 11. Similarly, when the output power of the solar panels is below the limit 12 during a later part of the day, the batteries supply additional power to the grid, so that the power delivered is at the level shown by the line in bold 13.
    [0021] An example of a suitable energy storage system is one that employs a bank of batteries that are connected to the distribution grid and selectively charged or discharged, to absorb excess energy and supply supplementary energy, respectively. Figure 3 is a block diagram illustrating an illustrative system for controlling the charging and discharging of storage batteries, and which implements the principles of the present invention. In reference to it, one or more solar panels 22 produce direct current output power which is converted into alternating current (AC) power through an inverter 24. This AC power is supplied to an electrical power distribution grid 26 .
    [0022] A sensor 27 provides a signal indicating the output power of the solar panel inverter to a battery storage system controller 28. The controller generates a signal that charges or discharges the batteries in a battery storage system ( BSS) 30, which is connected to grid 26. A first module 32 of the BSS 28 controller operates in accordance with the principles of the present invention to regulate the ramp, that is, the rate of change, of the output of the solar panels 22, as well how it keeps its contribution to the grid within the desired band. This module generates a Dispatch1 signal according to the instantaneous output power of the solar panel inverter to attenuate large and / or fast oscillations and to regulate the general level of that output power. In one embodiment of the invention, the Dispatch1 output signal from the
    Petition 870190077312, of 08/09/2019, p. 11/32
    8/17 solar power 32 can be directly applied to the BSS 30, to control the charging and discharging of the batteries according to the output of the solar panels.
    [0023] In another embodiment, the Dispatch1 signal emitted from the solar power regulation module 32 is supplied to a frequency regulation module 34, as shown in Figure 3. The frequency regulation module 34 modifies the Dispatch1 signal according to with the frequency of the AC power in grid 26. In essence, the frequency regulation module causes the BSS to supply power to, or absorb power from, the grid to maintain the grid's operating frequency within a predetermined range that is based on a desired nominal operating frequency, for example 60Hz in the United States. An example of such a frequency adjustment is described in copending patent application assigned to the same assignee No. US 12 / 248,106, the disclosure of which is incorporated herein by reference. As described therein, the amount, or rate, of energy transfer between the BSS and the grid can be a function of the grid's operating frequency. The amount of battery discharge or charging that is required by the frequency regulation module is combined with the Dispatch1 signal from the solar power regulation module 32, to produce a Dispatch2 output signal that is applied to the BSS.
    [0024] The control signal symbol that is applied to the BSS, for example, Dispatch1 in the first mode or Dispatch2 in the second mode, activates an inverter within a converter system (not shown) in the BSS to discharge the batteries in the grid, or activate a converter within the converter system in the BSS to charge the batteries with grid power. The magnitude of the signal determines the amount of power to be added to, or absorbed from, the grid. Since the output power of the solar panel inverter 24 is
    Petition 870190077312, of 08/09/2019, p. 12/32
    9/17 applied to the connection between the BSS and the grid, the charging and discharging of the batteries works effectively to absorb excess power from the solar panels, or supplement that power, respectively.
    [0025] A more detailed representation of the solar ramp regulation module 34 is illustrated in Figure 4. The module includes a processor 38 that executes control algorithms described below, and one or more forms of memory 40 configured with registers that store the parameters employed by the algorithms. These parameters include the following set of input values that have the indicated units of measure:
    Solar (kWh) - The output of the solar panel inverter at the current time point, t.
    LagSolar (kWh) - The regulated power emitted to the grid at time t-1, that is, the algebraic combination of the outputs of the solar panels 22 and the batteries of the BSS 30.
    Floor (kWh) - Lower limit specified by user at the power output, for example limit value 12.
    Ceiling (kWh) - Upper limit specified by the user at the power output, for example limit value 10.
    RampMax (kWh) - Maximum change specified by user, ascending or descending, in power output from time t-1 to t.
    SoC (%, 0-100) - State of charge of the batteries.
    BattCap (kWh) - Limit on instantaneous battery power output.
    kWh (kWh) - Total battery power capacity.
    Bias (kWh) - User-defined value for optimized battery charge status.
    [0026] The parameters stored in memory 40 include, add
    Petition 870190077312, of 08/09/2019, p. 13/32
    10/17 internationally, the following intermediate variables that are calculated by the algorithms:
    BasicDisp (kWh) - Unrestricted battery dispatch signal.
    Conf (kWh) - Restriction on battery charging. Cone (kWh) - Restriction on battery discharge. UpperLim (kWh) - Upper limit in the acceptable power output range for the grid.
    LowerLim (kWh) - Lower limit in the acceptable power output range for the grid.
    Rbe (%, 0 to 100) - Difference between current state of charge and full charge (= 1-SoC).
    [0027] As noted earlier, the values for Floor and Ceiling are values determined by users that could be a function of geographic and / or temporal parameters that influence the expected output from a secondary source. In another mode, they could be determined as a function of the charge state (SoC) of the batteries. Likewise, the value for RampMax is entered by the user, and could be a function of any one or more of those same factors. The maximum rate of change could also be determined as a function of the secondary source output.
    [0028] Based on the data stored in these records, processor 38 produces two output signals, Dispatch1 and Deposit. As previously described, in one mode the Dispatch1 signal can be directly applied to the BSS 30, to control the charging and discharging of the batteries. In an alternative modality, the Dispatch1 signal is supplied to the frequency regulation module, and modified as necessary to generate the Dispatch2 signal that controls the loading and unloading of batteries. 870190077312, from 08/09/2019, pg. 14/32
    11/17 days.
    [0029] The Deposit signal is used to selectively discard the power generated by the solar panels when it is excessive and cannot be absorbed by the grid and the BSS. For example, as figuratively represented in Figure 3, the Deposit signal can activate a switch 42 to divert solar power from the grid to an electrode 44 at ground potential.
    [0030] The algorithms performed by processor 38 to generate these signals are represented in the flowcharts of Figures 5 to 8B. Figure 5 illustrates the same routine that is performed periodically, for example once a second. At the beginning of the period, the current value of Solar is compared to the lower limit Piso, in step 50. If Solar is less than Piso, a discharge subroutine, Low, is performed in step 52. If the value for Solar is greater than Piso , the processor is moved to step 54, where it compares the value for Solar to the ceiling ceiling. If Solar exceeds Ceiling, a load subroutine, High, is performed in step 56. If Solar is lower than Ceiling, the processor performs a strip subroutine in step 57.
    [0031] The discharge subroutine of step 52 is represented in the flowchart of Figure 6. When the processor jumps to this subroutine, in step 58 it adjusts the value of the BasicDisp unrestricted battery discharge signal to be equal to the value Solar, minus the maximum of the Floor or (LagSolar minus RampMax). LagSolar is the combined output of solar panels and BSS at time t-1. (LagSolar-RampMax) is the minimum acceptable output, from a rate of change perspective. If the LagSolar is above, but close to, the floor value, then (LagSolar-RampMax) can cause the new outlet to be below the floor value. In this case, the max function ensures that the new target (unrestricted) output is at least at the floor value. This will be a negative value because the floor value is higher than the floor
    Petition 870190077312, of 08/09/2019, p. 15/32
    12/17 drive and the batteries will need to discharge power to the grid to compensate for the difference.
    [0032] The negative value of BasicDisp is essentially a request to discharge the batteries in order to raise the system output above the floor level. However, the amount of total discharge may not exceed the energy available in the batteries, or the maximum power rating of the batteries. Therefore, in step 60 the Cone parameter is adjusted to be equal to the negative of the minimum of (SoC * kWh / 100) or BattCap. The overall value is negative as this is a discharge constraint.
    [0033] In step 62, the maximum of the unrestricted dispatch value
    BasicDisp and the Cone constraint value is selected, to produce the control signal from Dispatch1. Since, in this subroutine, the batteries are being discharged, there is no excess energy to be deposited. Accordingly, in step 64 the Deposit control signal is set to 0.
    [0034] The flowchart in Figure 7 represents the load subroutine that is used to control the BSS when the output of the solar inverter is raised above a user-specified ceiling. In step 66, the value for BasicDisp is adjusted to be equal to the value of Solar minus the minimum of Ceiling and (LagSolar + RampMax). The maximum acceptable output from a slope perspective is defined by (LagSolar + RampMax). If LagSolar is close to the upper limit, then (LagSolar + RampMax) can cause the new outlet to reach above the ceiling. In this case, the min function ensures that the new target value (unrestricted) is at most equal to the ceiling value. This will be a positive value because the output of the inverses is higher than the ceiling value and the batteries will need to charge (absorb energy) to reduce the output.
    [0035] Any signal of charge must not exceed the unused energy capacity of the batteries, or the bad power rating
    Petition 870190077312, of 08/09/2019, p. 16/32
    13/17 near the batteries. Therefore, in step 68, the minimum of (Rbe * kWh / 100) and BattCap is selected to produce the Conf.
    [0036] In step 70, the lowest of the unrestricted dispatch
    BasicDisp and the Conf constraint, both of which are positive values, are selected to produce the Dispatch1 dispatch quantity control signal. If the constraint is linked, then there is too much output from the inverter 24 for the batteries to handle, either because they are close to full charge or because of their maximum power rating. In this case, some output from the inverter must be deposited so that the net output to the grid is within limits. Accordingly, in step 72 the Deposit control signal is set to be the maximum of zero or (BasicDisp - Conf).
    [0037] The flowchart of Figures 8A and 8B show subroutine 57 that is used by the processor to control the system when the output of the inverter 24 is in an acceptable range between the floor ceiling values. This is probably the case most of the time. During this time, the charge status of the batteries is maintained at an optimal level, so that it is ready to accommodate the next peak or valley at the exit of the solar panels.
    [0038] In step 74, the Conf loading restriction is adjusted.
    Since this is a loading restriction, it has a positive value. Any signal of charge must not exceed the batteries' unused energy capacity, or the maximum power rating of the batteries. Therefore, the minimum of (Rbe * kWh / 100) and BattCap is selected, to produce Conf.
    [0039] In step 76, the Cone unload restriction is adjusted. Since this is a discharge constraint, it has a negative value. Any discharge signal must not exceed the available energy in the batteries, or the maximum power rating of the batteries.
    Petition 870190077312, of 08/09/2019, p. 17/32
    14/17
    Accordingly, Cone is adjusted to be equal to the minimum of (SoC * kWh / 100) and BattCap.
    [0040] The acceptable upper limit on the system output is the system output in the previous period of time plus the maximum ramp rate, limited by the ceiling. In step 78, the upper limit value UpperLim is adjusted to be equal to the minimum of Ceiling e (LagSolar + RampMax). The lower acceptable limit on the system output is the system output in the previous period minus the maximum ramp rate, limited by the floor. In step 80, the lower limit value LowerLim is set equal to the maximum of Floor e (LagSolar - RampMax). Since the values for Ceiling and Floor can be functions of temporal factors, UpperLim and LowerLim can also be functions of these factors.
    [0041] Since the system output is unlikely to exceed the ceiling, there is no need for power deposit. Accordingly, the Deposit control signal is set to zero in step 82.
    [0042] Referring now to Figure 8B, in step 84 a check is made to see if the state of charge of the batteries is greater than a threshold specified by the user, for example 89%. If so, then the batteries are close to full charge, and the processor moves to step 86. In this step, the Dispatch1 control signal is skewed towards the upper limit in order to maximize the discharge (or minimize the charge) . The basic unrestricted dispatch is SolarUpperLim. If Solar> UpperLim, then the dispatch is a load signal, and is restricted by the load restriction Conf. If the Solar <UpperLim, then the dispatch is a discharge signal, and is restricted by the Cone discharge constraint. The value thus restricted is reduced by the value supplied by the user for the Bias, and produced as Dispatch1.
    [0043] If the charge status is below the upper threshold, a check is made in step 88 to see if the charge status of the batteries
    Petition 870190077312, of 08/09/2019, p. 18/32
    15/17 as is less than a lower threshold specified by the user, for example 20%. If so, then the batteries are close to being discharged, and the processor moves to step 90. In this case, the Dispatch1 control signal is skewed towards the lower limit in order to maximize the charge (or minimize the discharge). The basic unrestricted dispatch is Solar-Lowerlim. If the Solar <Lowerlim, then the dispatch is a discharge signal, and is restricted by the Cone value. If Solar> Lowerlim, then the dispatch is a load signal, and is restricted by Conf. The value thus restricted is added to the value for the Bias, which becomes Dispatch1.
    [0044] In step 92, it is determined whether Solar> UpperLim. If so, then a load signal, Solar-UpperLim, restricted by Conf, is sent in step 94. If Solar is not superior to UpperLim, it is determined in step 96 of Solar <LowerLim. If so, then a discharge signal, Solar-LowerLim, restricted by the Cone, is sent in step 98. If none of the conditions in steps 84, 88, 92 or 96 are met, then no regulation is necessary, and the control signal Dispatch1 is set to zero in step 100.
    [0045] It will be understood that the present invention as described above can be implemented in the form of control logic through the use of hardware and / or through the use of software in an integrated or modular way. Based on the disclosure and teachings provided in this document, a person of ordinary skill in the art will understand and observe other approaches to implementing the present invention through the use of hardware and a combination of hardware and software. For example, in the example in Figure 4, the ramp regulation module is represented as having its own processor. In practice, the processor that implements the logic of Figures 5 to 8B can be part of a larger system, for example one that operates the entire BSS 28 controller, and performs other routines in addition to those represented in the flowcharts.
    Petition 870190077312, of 08/09/2019, p. 19/32
    16/17 [0046] Any of the functions or software components described in this document can be deployed as software code to be executed by a processor using any suitable computer language such as, for example, Java, C ++ or Perl based on, for example, conventional or object-oriented techniques. The software code can be stored as a series of instructions, or commands on a computer-readable medium for storage, such suitable media including random access memory (RAM), read-only memory (ROM), magnetic media such as a disk hard drive or floppy disk, or optical media such as a compact disc (CD) or DVD (digital versatile disc), flash memory, and the like. The computer-readable media can be any combination of such storage devices.
    [0047] The above description of exemplary modalities has been presented for the purposes of illustration and description. It will be noted that the principles underlying the invention can be implemented in other ways without departing from its essential characteristics. For example, although the exemplary modalities have been described in relation to the use of solar panels with a secondary power source, it will be noted that the invention can be used with any other type of power source, particularly those that have variable outputs, such as windmills. Likewise, energy storage media in addition to batteries, such as capacitive systems, flywheels or compressed air, can be used to regulate the output power of the secondary source. In addition, although a desired power band that has both upper and lower limits has been described to regulate the output power, the invention can be used in systems that have only one limit, for example a floor value with no upper limit
    Petition 870190077312, of 08/09/2019, p. 20/32
    17/17 for acceptable power range. The maximum ramp rate could also be asymmetric with a different allowable change in power when the output is being raised than when it is decreasing.
    [0048] Accordingly, the exemplary modalities mentioned above are not intended to be exhaustive or to limit the invention to the precise form described, and many modifications and variations are possible in light of the aforementioned teachings. The modalities are described to explain the principles of the invention and their practical applications to thereby allow other individuals skilled in the art to use the invention in various modalities and with various modifications as appropriate to the particular intended use.
    权利要求:
    Claims (19)
    [1]
    1. Method for regulating the output power from an electricity source to an electricity distribution grid (26), characterized by the fact that it comprises:
    determine whether:
    (a) an output power from the electricity source is outside a predetermined range based on the ability of the grid (26) to absorb variations, and (b) a rate of change in the output power exceeds a predefined maximum value;
    applying said power output from the electricity source to a connection between the grid (26) and an energy storage medium energetically coupled to the grid (26); and in response to the determination that one or both of the conditions (a) and (b) are met, regulate said contribution by transferring energy between the energy storage medium and the electricity grid (26), wherein the transfer comprises unload or load the energy storage medium, where the loading of the energy storage medium is restricted by a loading restriction based on unusable energy storage capacity of the energy storage medium and a maximum medium power rating energy storage medium, and where the discharge of the energy storage medium is restricted by a discharge constraint based on the available energy storage capacity of the energy storage medium and the maximum power rating of the energy storage medium , in response to the determination that none of the conditions
    Petition 870190077312, of 08/09/2019, p. 22/32
    [2]
    2/7 sections (a) and (b) are satisfied: determine if a state of charge (SoC) of the energy storage medium is within predetermined limits; and in response to the determination that the SoC of the energy storage medium is outside of said predetermined limits, transferring energy between the energy storage medium and the electricity grid (26) to bring the SoC into said predetermined limits, wherein transferring energy between the energy storage medium and the electricity grid (26) to bring the SoC within said predetermined limits comprises:
    set a higher value and a lower value for transferring energy between the energy storage medium and the electricity grid (26), each of which is based on a more recent amount of electricity being supplied to the electricity grid (26) and the maximum value for the rate of change;
    determine whether the output power of the electricity source is greater than the upper value, and in response to the determination that the output power of the electricity source is greater than the upper value, transfer energy from the electricity grid (26) to the energy storage medium carrying the energy storage medium.
    2. Method, according to claim 1, characterized by the fact that said predetermined range is defined by a lower boundary value, and in which, if the output power of the electricity source is lower than said lower boundary value, the energy is transferred from the energy storage medium to the electricity grid (26).
    [3]
    3. Method, according to claim 2, characterized by the fact that it also includes the step of restricting the amount of energy transferred from the energy storage medium to the grain
    Petition 870190077312, of 08/09/2019, p. 23/32
    3/7 of electricity (26) in accordance with the maximum predefined value for the rate of change.
    [4]
    4. Method according to claim 3, characterized by the fact that the amount of energy transferred from the energy storage medium to the electricity grid (26) is further restricted in accordance with the minimum state of charge of the medium. energy storage and the maximum power rating of the energy storage medium.
    [5]
    5. Method, according to claim 2, characterized by the fact that said predetermined range is still defined by an upper boundary value, and in which, if the output power of the electricity source is greater than said boundary value the energy is transferred from the electricity grid (26) to the energy storage medium.
    [6]
    6. Method, according to claim 5, characterized by the fact that it also includes a step of restricting the amount of energy transferred to the energy storage medium from the electricity grid (26) in accordance with the maximum predefined value for the change rate.
    [7]
    7. Method, according to claim 6, characterized by the fact that the amount of energy transferred to the energy storage medium from the electricity grid (26) is further restricted according to the minimum of the unused capacity of the medium. energy storage and the maximum power rating of the energy storage medium.
    [8]
    8. Method according to claim 1, characterized by the fact that the predetermined range is a function of a time factor.
    [9]
    9. Method, according to claim 1, characterized by the fact that the predetermined range is a function of a parameter
    Petition 870190077312, of 08/09/2019, p. 24/32
    4/7 geographic section that influences the output of the electricity source.
    [10]
    10. Method according to claim 1, characterized by the fact that the predetermined range is a function of the state of charge of the energy storage medium.
    [11]
    11. Method according to claim 1, characterized by the fact that the predetermined maximum rate of change is a function of a temporal factor.
    [12]
    12. Method, according to claim 1, characterized by the fact that the predetermined maximum rate of change is a function of a geographical parameter that influences the output of the electricity source.
    [13]
    13. Method according to claim 1, characterized by the fact that the predetermined maximum rate of change is a function of the output of the electricity source.
    [14]
    14. Method according to claim 1, characterized by the fact that the predetermined maximum rate of change is a function of the state of charge of the energy storage medium.
    [15]
    15. Method according to claim 1, characterized by the fact that it also includes the step of restricting the amount of energy transferred from the energy storage medium to the electricity grid (26) in accordance with the minimum state of charge of the energy storage medium and the maximum power rating of the energy storage medium.
    [16]
    16. Method according to claim 1, characterized by the fact that it also includes the step of restricting the amount of energy transferred to the energy storage medium from the electricity grid (26) in accordance with the minimum capacity of the energy storage medium and the maximum power rating of the energy storage medium.
    Petition 870190077312, of 08/09/2019, p. 25/32
    5/7
    [17]
    17. Method according to claim 1, characterized by the fact that the predetermined limits are a function of a temporal factor.
    [18]
    18. System for regulating the output power of an electricity source that is supplied to an electricity distribution grid (26), characterized by the fact that it comprises:
    at least one energy storage medium;
    a converter system which, in response to a command to add energy to or absorb energy from the grid (26), is configured to selectively couple said storage medium to the grid (26) to transfer energy between the energy storage and the grid (26); and a power regulation system that determines whether:
    (a) an output power from the electricity source is outside a predetermined range based on the ability of the grid (26) to absorb variations, and (b) the rate of change in the output power exceeds a predefined maximum value, where said power regulation system controls said converter system by transferring energy between the energy storage medium and the electricity grid (26) in response to the determination that one or both conditions (a) and (b) are satisfied , where the transfer comprises discharging or charging the energy storage medium, and where the loading of the energy storage medium is restricted by a loading restriction based on unused energy storage capacity of the energy storage medium, and a maximum power rating of the energy storage medium; and
    Petition 870190077312, of 08/09/2019, p. 26/32
    6/7 where the discharging of the energy storage medium is restricted by a discharge constraint based on the available energy storage capacity of the energy storage medium and the maximum power rating of the energy storage medium, where the power regulation system is further configured to:
    in response to the determination that none of conditions (a) and (b) are met:
    determine if a state of charge (SoC) of the energy storage medium is within predetermined limits; and in response to the determination that the SoC of the energy storage medium is outside of said predetermined limits, transferring energy between the energy storage medium and the electricity grid (26) to bring the SoC into said predetermined limits, set a higher value and a lower value for transferring energy between the energy storage medium and the electricity grid (26), each of which is based on a more recent amount of electricity being supplied to the electricity grid (26) and the maximum value for the rate of change;
    determine whether the output power of the electricity source is greater than the upper value, and in response to the determination that the output power of the electricity source is greater than the upper value, transfer energy from the electricity grid (26) to the energy storage medium carrying the energy storage medium.
    [19]
    19. System, according to claim 18, characterized by the fact that said power regulation system still includes a frequency regulation system that determines whether the frequency
    类似技术:
    公开号 | 公开日 | 专利标题
    BR112012022923B1|2019-11-26|METHOD AND SYSTEM FOR REGULATING OUTPUT POWER FROM AN ELECTRICITY SOURCE TO AN ELECTRICITY DISTRIBUTION GRID
    CN108306331B|2020-09-25|Optimal scheduling method of wind-solar-storage hybrid system
    US10355487B2|2019-07-16|Photovoltaic system
    JP5100132B2|2012-12-19|Frequency adjustment system and frequency adjustment method
    JP4170565B2|2008-10-22|Power fluctuation smoothing apparatus and control method of distributed power supply system including the same
    JP5073258B2|2012-11-14|Control method of sodium-sulfur battery
    JP2001327080A|2001-11-22|Power storage device and control method of distributed power supply system equipped therewith
    CN103986190A|2014-08-13|Wind and solar storage combining power generation system smooth control method based on power generation power curves
    DK2562904T3|2018-12-17|Process for maintaining an optimal amount of energy derived from a power generation system in a storage device
    JPWO2011118766A1|2013-07-04|Power supply system, centralized management device, system stabilization system, centralized management device control method, and centralized management device control program
    US9502903B2|2016-11-22|Energy management systems and methods
    US20120228939A1|2012-09-13|Power supply method, a recording medium which is computer readable and a power generation system
    BR112020019760A2|2021-01-26|utility scale renewable power plant, energy storage and tightly coupled solar PV
    US10819269B2|2020-10-27|DC integration of photovoltaic and DFIG wind turbine generation with electric storage
    JP5475019B2|2014-04-16|Power supply method, computer-readable recording medium, and power generation system
    WO2016055658A1|2016-04-14|State of charge management in battery systems
    US10069303B2|2018-09-04|Power generation system and method with energy management
    US20120253537A1|2012-10-04|Power supply method, recording medium which is computer readable and power generation system
    CN111064196B|2021-07-20|Micro-grid voltage control method for fuzzy self-adaptive operation of high-permeability fan
    JP2020191698A|2020-11-26|Power system
    JP5355721B2|2013-11-27|Charge / discharge system and charge / discharge control device
    JP7011881B2|2022-01-27|Hybrid power generation system and power control device
    JP2021005912A|2021-01-14|Power generation control device, power generation control method and renewable energy hybrid power generation system
    WO2019147887A1|2019-08-01|Wind turbina with electric strorage
    BR112021002913A2|2021-05-11|battery energy storage system
    同族专利:
    公开号 | 公开日
    RU2012143401A|2014-04-20|
    CL2012002505A1|2013-01-18|
    BR112012022923A2|2017-10-24|
    ES2762402T3|2020-05-25|
    CN103081290A|2013-05-01|
    EP2545632A2|2013-01-16|
    WO2011112255A3|2012-01-05|
    RU2565235C2|2015-10-20|
    US8914158B2|2014-12-16|
    HUE047262T2|2020-04-28|
    EP2545632B1|2019-10-23|
    US20110221276A1|2011-09-15|
    PT2545632T|2020-01-21|
    EP2545632A4|2013-12-18|
    CN103081290B|2017-03-01|
    WO2011112255A2|2011-09-15|
    DK2545632T3|2020-01-20|
    AR080498A1|2012-04-11|
    PL2545632T3|2020-04-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE19516838A1|1995-05-08|1996-11-14|Hagen Batterie Ag|Method and circuit arrangement for covering energy peak demand in electrical AC or three-phase networks|
    EP0858153B1|1997-02-07|2003-04-16|ALSTOM Ltd|Method for controlling a power plant|
    US5923100A|1997-03-31|1999-07-13|Lockheed Martin Corporation|Apparatus for controlling a solar array power system|
    NZ535509A|2002-03-28|2006-03-31|Robertshaw Controls Co|Energy management system and method|
    US7262520B2|2003-12-18|2007-08-28|General Electric Company|Robust power distribution systems and methods|
    US7117044B2|2003-12-30|2006-10-03|Square D Company|Alternative energy system control method and apparatus|
    US20070100506A1|2005-10-31|2007-05-03|Ralph Teichmann|System and method for controlling power flow of electric power generation system|
    WO2007104167A1|2006-03-16|2007-09-20|Abb Research Ltd|Method for operating a battery energy storage system and battery energy storage system|
    WO2007149822A2|2006-06-18|2007-12-27|Mythos Solar Energy|Solar power supply with monitoring and communications|
    US7983799B2|2006-12-15|2011-07-19|General Electric Company|System and method for controlling microgrid|
    US7787272B2|2007-03-01|2010-08-31|Wisconsin Alumni Research Foundation|Inverter based storage in dynamic distribution systems including distributed energy resources|
    JP4551921B2|2007-09-27|2010-09-29|株式会社日立エンジニアリング・アンド・サービス|Wind power generation system with storage system|
    JP5391598B2|2008-07-10|2014-01-15|株式会社明電舎|Stabilized control system for distributed power supply|
    US8901411B2|2008-08-27|2014-12-02|General Electric Company|System and method for controlling ramp rate of solar photovoltaic system|
    MX2011008581A|2009-02-13|2011-09-01|First Solar Inc|Photovoltaic power plant output.|
    US9257847B2|2009-10-12|2016-02-09|Sunpower Corporation|Photovoltaic system with managed output|
    US8860236B2|2009-10-19|2014-10-14|Uwm Research Foundation, Inc.|Wind energy power conversion system reducing gearbox stress and improving power stability|
    US9466984B2|2009-10-26|2016-10-11|General Electric Company|Power ramp rate control for renewable variable power generation systems|
    CA2798827A1|2010-05-07|2011-11-10|Advanced Energy Industries, Inc.|Systems and methods for forecasting solar power|
    US8344550B2|2010-12-21|2013-01-01|General Electric Company|Power conversion control with energy storage|US8847551B2|2009-02-09|2014-09-30|Younicos, Inc.|Discharging batteries|
    US8471520B2|2010-05-04|2013-06-25|Xtreme Power Inc.|Managing renewable power generation|
    WO2013041534A2|2011-09-20|2013-03-28|Sma Solar Technology Ag|Provision of control power with a photovoltaic arrangement|
    DE102011055232A1|2011-11-10|2013-05-16|Evonik Industries Ag|Method for providing control power with a variable dead band energy storage in the control power supply|
    US10886742B2|2011-12-09|2021-01-05|The Aes Corporation|Method and system for performance management of an energy storage device|
    KR101818036B1|2012-01-30|2018-01-15|한국전자통신연구원|Energy Storage System with Wire and Wireless Energy Transfer Function|
    JP5738220B2|2012-02-28|2015-06-17|三菱重工業株式会社|Output smoothing apparatus, output smoothing method and program|
    WO2014000770A1|2012-06-26|2014-01-03|Siemens Aktiengesellschaft|Power supply system|
    JP5968719B2|2012-08-06|2016-08-10|京セラ株式会社|Management system, management method, control device, and storage battery device|
    US20140350743A1|2012-08-27|2014-11-27|Nec Laboratories America, Inc.|Tiered power management system for microgrids|
    US9685887B2|2012-10-12|2017-06-20|Younicos Inc.|Controlling power conversion systems|
    US9276425B2|2012-12-28|2016-03-01|Younicos Inc.|Power management systems with dynamic target state of charge|
    US9368968B2|2012-12-28|2016-06-14|Younicos, Inc.|Responding to local grid events and distributed grid events|
    JP5709910B2|2013-01-21|2015-04-30|三菱重工業株式会社|Control apparatus and method, program, and natural energy power generation apparatus including the same|
    US9641021B2|2013-01-31|2017-05-02|General Electric Company|Photovoltaic power generation system including apparatus and method to buffer power fluctuations|
    DE102013206808A1|2013-04-16|2014-10-16|Younicos Ag|Method and device for controlling the state of charge of a battery power plant|
    US20160079778A1|2013-04-29|2016-03-17|Welsengen Limited|Apparatus and method for managing stored energy|
    CN103248069B|2013-05-10|2015-11-18|深圳晶福源科技股份有限公司|A kind of counterflow-preventing photovoltaic parallel in system and prevent the method for reverse current|
    CN105379058A|2013-07-16|2016-03-02|日本电气株式会社|Rapid charging method for storage cell, rapid charging system, and program|
    US9599976B2|2013-09-23|2017-03-21|Infosys Limited|Systems and methods for effective selection of disparate distributed power sources for smart grid|
    CN104201699A|2014-09-05|2014-12-10|广东电网公司佛山供电局|Energy storage converter based automatic micro-grid PCCpower tracking method|
    DE102014221555A1|2014-10-23|2016-04-28|Wobben Properties Gmbh|Method for operating an island grid|
    US20170271912A1|2014-12-16|2017-09-21|Sinewatts, Inc.|Dispatchable photovoltaic panel with fully integrated energy storage and grid interactive power conversion|
    JP6449645B2|2014-12-26|2019-01-09|シャープ株式会社|Power control apparatus and power control method|
    JP6480196B2|2015-01-26|2019-03-06|株式会社日立製作所|Storage battery system and photovoltaic power generation system having the same|
    JP6480198B2|2015-01-28|2019-03-06|株式会社日立製作所|Storage battery system and photovoltaic power generation system having the same|
    FR3035550B1|2015-04-27|2019-05-03|Commissariat A L'energie Atomique Et Aux Energies Alternatives|METHOD FOR ELECTRICALLY CHARGING A BATTERY WITH AN INTERMITTENT ENERGY SOURCE AND CORRESPONDING CHARGE CONTROL DEVICE|
    WO2016196968A1|2015-06-04|2016-12-08|Nec Energy Solutions, Inc.|Utilizing a load for optimizing energy storage size and operation in power systems regulation applications|
    CN104967139A|2015-07-29|2015-10-07|阳光电源股份有限公司|Photovoltaic power generation device|
    US10418832B2|2015-10-08|2019-09-17|Con Edison Battery Storage, Llc|Electrical energy storage system with constant state-of charge frequency response optimization|
    US10197632B2|2015-10-08|2019-02-05|Taurus Des, Llc|Electrical energy storage system with battery power setpoint optimization using predicted values of a frequency regulation signal|
    US10186889B2|2015-10-08|2019-01-22|Taurus Des, Llc|Electrical energy storage system with variable state-of-charge frequency response optimization|
    US10283968B2|2015-10-08|2019-05-07|Con Edison Battery Storage, Llc|Power control system with power setpoint adjustment based on POI power limits|
    US10222427B2|2015-10-08|2019-03-05|Con Edison Battery Storage, Llc|Electrical energy storage system with battery power setpoint optimization based on battery degradation costs and expected frequency response revenue|
    US11210617B2|2015-10-08|2021-12-28|Johnson Controls Technology Company|Building management system with electrical energy storage optimization based on benefits and costs of participating in PDBR and IBDR programs|
    US10700541B2|2015-10-08|2020-06-30|Con Edison Battery Storage, Llc|Power control system with battery power setpoint optimization using one-step-ahead prediction|
    US10190793B2|2015-10-08|2019-01-29|Johnson Controls Technology Company|Building management system with electrical energy storage optimization based on statistical estimates of IBDR event probabilities|
    US10742055B2|2015-10-08|2020-08-11|Con Edison Battery Storage, Llc|Renewable energy system with simultaneous ramp rate control and frequency regulation|
    US10418833B2|2015-10-08|2019-09-17|Con Edison Battery Storage, Llc|Electrical energy storage system with cascaded frequency response optimization|
    US10554170B2|2015-10-08|2020-02-04|Con Edison Battery Storage, Llc|Photovoltaic energy system with solar intensity prediction|
    US10250039B2|2015-10-08|2019-04-02|Con Edison Battery Storage, Llc|Energy storage controller with battery life model|
    US10389136B2|2015-10-08|2019-08-20|Con Edison Battery Storage, Llc|Photovoltaic energy system with value function optimization|
    US10564610B2|2015-10-08|2020-02-18|Con Edison Battery Storage, Llc|Photovoltaic energy system with preemptive ramp rate control|
    WO2017154116A1|2016-03-08|2017-09-14|日本電気株式会社|Power control device, power control system, power control method, and program|
    US10778012B2|2016-07-29|2020-09-15|Con Edison Battery Storage, Llc|Battery optimization control system with data fusion systems and methods|
    US10594153B2|2016-07-29|2020-03-17|Con Edison Battery Storage, Llc|Frequency response optimization control system|
    JP6640925B2|2017-05-29|2020-02-05|京セラ株式会社|Management system, management method, control device, and storage battery device|
    FR3060229B1|2016-12-12|2019-01-25|Electricite De France|POWER CONTROL OF INVERTERS OF A PHOTOVOLTAIC INSTALLATION FOR PARTICIPATING IN THE FREQUENCY ADJUSTMENT OF THE ELECTRICAL DISTRIBUTION NETWORK|
    US11163271B2|2018-08-28|2021-11-02|Johnson Controls Technology Company|Cloud based building energy optimization system with a dynamically trained load prediction model|
    US11159022B2|2018-08-28|2021-10-26|Johnson Controls Tyco IP Holdings LLP|Building energy optimization system with a dynamically trained load prediction model|
    CN109617093A|2018-12-04|2019-04-12|北京科诺伟业科技股份有限公司|A kind of control method for maintaining grid power stable|
    TWI726590B|2019-01-30|2021-05-01|財團法人工業技術研究院|Charging and discharging device and charging and discharging method|
    DE102019123383A1|2019-08-30|2021-03-04|Wobben Properties Gmbh|Method for operating an electrical storage station|
    FR3104842A1|2019-12-16|2021-06-18|Commissariat A L'energie Atomique Et Aux Energies Alternatives|Method and device for controlling an electricity production assembly, and associated production assembly|
    法律状态:
    2019-01-08| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-06-11| B06T| Formal requirements before examination [chapter 6.20 patent gazette]|
    2019-10-08| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2019-11-26| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 10/03/2011, OBSERVADAS AS CONDICOES LEGAIS. (CO) 20 (VINTE) ANOS CONTADOS A PARTIR DE 10/03/2011, OBSERVADAS AS CONDICOES LEGAIS |
    优先权:
    申请号 | 申请日 | 专利标题
    US12/722,271|US8914158B2|2010-03-11|2010-03-11|Regulation of contribution of secondary energy sources to power grid|
    US12/722,271|2010-03-11|
    PCT/US2011/000446|WO2011112255A2|2010-03-11|2011-03-10|Regulation of contribution of secondary energy sources to power grid|
    [返回顶部]