• 专利附录
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    • 专利摘要:
    Systems and methods for transferring output power between power sources (110, 120) to an electric bus (130) are provided. In one example, a multi-source power supply system may include an electric bus (130) having at least two power sources (110, 120) that can each be selectively coupled to the power bus (130), by example via contactors (115, 125). At least one of the power sources (120) may include a unidirectional or bidirectional power converter. The power supply system may further include a control system (200) configured to control the power output (e.g. output voltage and output current) of the power converter to provide a power transfer. uninterrupted power output power to the electric bus (130) between the first and second power sources (110, 120). In exemplary embodiments, the uninterruptible power transfer can be achieved by regulating the output current of a power source (120) to a fixed current value, a current ramp, and / or using a resistor. virtual (226) programmed into a voltage regulator (224).
    公开号:FR3043272A1
    申请号:FR1660210
    申请日:2016-10-21
    公开日:2017-05-05
    发明作者:Ryan Buffenbarger；Jinhui Zhang
    申请人:GE Aviation Systems LLC；
    IPC主号:
    专利说明:

    Uninterruptible power transfer for multi-source power system
    The present invention generally relates to multi-source power supply systems and in particular to power transfer among power sources in a multi-source power supply system.
    A multi-source power supply system may include an electric bus that can receive power from multiple sources. For example, contactors or other switching elements may be used to selectively couple each of the multiple power sources to the electric bus. At least one of the power supplies coupled to the power bus may include a power converter used to convert the power generated by a power source into a power adapted to the electric bus.
    For example, in an aeronautical system, electrical energy for avionics, engines and other electrical equipment of an aircraft may be provided by multiple generator systems coupled to the electric bus. Each generator system may comprise a generator coupled to a gas turbine engine. Each generator can convert mechanical energy produced by the gas turbine engine into alternating current (AC) power. A power converter can be used to convert the generated AC power into DC power for a DC electric bus.
    In some circumstances, it may be desirable to switch the power output between power sources coupled to the electric bus. For example, it may be desirable to transfer power output from one of the multiple power sources to another power source. The transfer of power output between power sources coupled to the electric bus can lead to power interruptions and / or power quality disturbances, such as voltage dips or spikes or voltages. high currents flowing between the connected sources.
    For example, in AC systems, the transfer of output power among multiple power sources into a multi-source power supply system can be achieved by adjusting a voltage of a sampling source (for example, the source of power). power supply which is added to the electric bus) on a voltage which is higher than a voltage of the power supply already delivering power to the electric bus. This can cause power oscillations between power sources because the higher voltage set point value of the new power source can result in the entire load being picked up on the power bus. This can eventually cause the bus voltage to drop as the current increases and the load moves back to the original source. In addition, the frequency of the source connected to the bus may be slightly offset with respect to the bus frequency. As a result, there may be an unknown and uncontrolled load movement between the sources when the new source is added to the electric bus.
    In DC systems, a sampling source may be coupled to the electric bus using power sources capable of providing or absorbing loads up to and including the full power capacity of each of the sources. In addition to and / or instead of this, complex algorithms can be used to set the internal voltage setpoint values among the regulators for the power sources, in order to reduce the current flowing. These techniques can lead to unknown and uncontrolled load shifts and cause significant oscillations between power sources, as well as significant power losses. Therefore, there is a need for systems and methods for transferring output power among power sources into a multi-source power supply system while reducing power interruptions and power disturbances. the quality of the power.
    Aspects and advantages of embodiments of the present disclosure will be set forth in part in the description below or will be apparent from the description or will appear in the practice of the embodiments.
    An example of an aspect of the present disclosure is a method of transferring power output to an electric bus between a first power source and a second power source. The method includes regulating, using a voltage regulator, an output voltage of the second power source, based, at least in part, on a measured voltage of the electric bus. The method further includes coupling the second power source to the power bus, so that the first power source and the second power source are both coupled to the power bus during a transfer period. During the transfer period, the method includes assigning the power output to the electric bus from the first power source and the second power source, so that the second power source provides power to the power bus. controlled output to the electric bus. The method further includes decoupling the first power source of the electric bus at the end of the transfer period.
    Another aspect, given by way of example, of the present disclosure relates to a power supply system. The power supply system may include a first power source and a second power source. The second power source may include a power converter. The system may further include an electrical bus configured to be selectively coupled to the first power source and configured to be selectively coupled to the second power source. The system further comprises a control system comprising a current regulator, configured to regulate an output current of the power converter, and a voltage regulator configured to regulate an output voltage of the power converter. When the control system receives a transfer signal indicating the triggering of an output power transfer to the electric bus, from the first power source to the second power source, the voltage regulator is configured to regulate the voltage outputting the second power source to match a voltage associated with the electric bus, and a current setpoint value for the current regulator is adjusted to a fixed current setpoint of about zero amperes.
    Another example of an aspect of the present disclosure is a method of transferring power output to an electric bus between a first power source and a second power source. The method includes setting a current setpoint value of a current controller associated with the second power source, a fixed current setpoint, and coupling the first power source to the electric bus. so that the first power source and the second power source are both connected to the power bus during a transfer period. During the transfer period, the method includes regulating an output current of the second power source based, at least in part, on the fixed current reference value. On the other hand, the method includes decoupling the second power source from the electric bus at the end of the transfer period.
    Variations and modifications can be made to these aspects of the present invention given as examples.
    These and other features, aspects and advantages of various embodiments will be better understood from the following detailed description of embodiments, taken as non-limiting examples. The accompanying drawings, which are incorporated herein by reference and form an integral part thereof, illustrate embodiments of the present disclosure and, together with the description, serve to explain the related principles. The detailed examination of embodiments addressed to those skilled in the art is the subject of the description, with reference to the appended drawings, in which: FIG. 1 represents an example of an electrical system according to examples; embodiments of the present disclosure; Fig. 2 shows aspects of an exemplary control system according to exemplary embodiments of the present disclosure; Fig. 3 shows a method of transferring power output to a power source associated with a power converter according to exemplary embodiments of the present invention; and Fig. 4 shows a method of transferring output power from a power source associated with a power converter according to exemplary embodiments of the present disclosure.
    Aspects exemplified relate to systems and methods for transferring output power between power sources to an electric bus in a multi-source power supply system. More particularly, a multi-source power supply system can comprise an electric bus having at least two power sources which can each be selectively coupled to the electric bus, for example via contactors. At least one of the power sources may include a unidirectional or bidirectional power converter. The power supply system may further include a control system configured to control the power output (e.g., output voltage and output current) of the power converter to provide uninterrupted power transfer. from the power output to the electric bus, between the first and second power sources.
    In exemplary embodiments, the uninterruptible power transfer can be achieved by regulating the output current of a power source to a fixed current value (e.g., about zero amperes) during a transfer period, so the power source provides a known load when connected or disconnected from the power bus. In some embodiments, the output current of the power source may be regulated according to a current ramp during the transfer period. In addition and / or alternatively, the uninterruptible power transfer can be implemented by providing a virtual resistance in a voltage regulator associated with the power source to ensure a smooth transition between the power sources.
    More particularly, in one embodiment, the power system can transfer power output from a first power source, delivering power to an electric bus, to a second power source that does not deliver power. power to the electric bus. The second power source may have a power converter that can be controlled to regulate the output current and the output voltage of the second power source.
    Uncutting power transfer to the second power source can be accomplished by initializing the second power source for connection to the power bus. The initialization of the second power source may comprise the setting of a current reference value of a current regulator associated with the second power source, on a fixed current reference value, for example of about zero amperes. The initialization of the power source may further comprise regulating, using a voltage regulator associated with the second power source, the output voltage of the second power source, in order to adapt it to the voltage of the electric bus.
    After initializing the second power source, the power system can couple the second power source to the power bus, so that the first power source and the second power source are both coupled to the electric bus during a transfer period. During the transfer period, power output to the electric bus can be allocated between the first power source and the second power source, so that the second power source provides controlled output power to the bus. electric.
    For example, in some embodiments, the assignment of power output to the electric bus from the first power source and the second power source may include regulation, using a controller current, an output current of the second power source, based, at least in part, a fixed current reference value, during the transfer period. In particular embodiments, the fixed current setpoint may be about zero amps, so that the second power source does not deliver power to the electric bus during the transfer period. Since the output voltage of the second power source is regulated to match the voltage of the electric bus, the second power source can be controlled to not provide or absorb current from the electric bus, resulting in oscillations. reduced power during power transfers.
    In some embodiments, the assignment of power output to the electric bus from the first power source and the second power source may include regulating, using a current regulator, an output current of the second power source, based, at least in part, on a current ramp during the transfer period. The current ramp can define a gradual increase in current during the transfer period. This increase can be linear, exponential, incremental increments, or other suitable forms of increase in current during the transfer period. In this embodiment, the current regulator may receive a current return at a time from the first power source and the second power source, or another appropriate power return indicating the total current supplied to the electric bus. .
    In some embodiments, the assignment of the power output to the electric bus from the first power source and the second power source during the transfer period may include regulation, using a voltage regulator, the output voltage of the second power source, based, at least in part, on a virtual resistor programmed into the voltage regulator. The actual output current of the second power source can be multiplied by the virtual resistance to obtain a voltage adjustment. This voltage adjustment can be subtracted from the voltage setpoint supplied to the voltage regulator, so that the output voltage of the second power source is reduced as an output current supplied by the second power source is reduced. power source is increased. In this embodiment, the power source can take a portion of the power delivered to the electric bus during the transfer period, to ensure a smooth transition from the first power source to the second power source. At the end of the transfer period, the first power source can be decoupled from the electric bus. As soon as the first power source is decoupled from the power bus, the second power source can be regulated using the voltage regulator to deliver the power to the electric bus based on a voltage setpoint. The current regulation performed by the current regulator, based on a fixed current reference value (for example zero amperes), can be stopped as soon as the first power source is decoupled from the electric bus.
    In another mode of implementation, the power system can transfer the output power of the second power source, delivering power to an electric bus, to a first power source that does not deliver power. to the electric bus. The second power source may include a power converter that can be controlled to regulate the output current and the output voltage of the second power source.
    Specifically, an uninterruptible power transfer can take place by initializing the second power source for power transfer to the first power source. The initialization of the second power source may include the setting of a current setpoint value of a current regulator associated with the second power source, to a fixed current setpoint value, for example about zero amps. This can cause the second power source to provide an output voltage that drifts to a minimum voltage limit for the power converter. As soon as the second power source has been initialized, the power system can couple the first power source to the power bus, so that the first power source and the second power source are both coupled to the electric bus during a transfer period. During the transfer period, the output current of the second power source can be regulated using a current regulator, based, at least in part, on the fixed current reference value (for example, zero amps). . In some embodiments, the output current of the power source can be regulated according to a current ramp during the transfer period. Thus, the second power source is controlled to provide a known load during the transfer period. At the end of the transfer period, the second power source can be decoupled from the electric bus.
    Aspects of the present disclosure, by way of example, may have a technical effect of providing seamless output power transfer among power sources in a multi-source power supply system. As a result, voltage drops, spikes, and / or high currents flowing during the power transfer from power sources to an electric bus can be reduced.
    Fig. 1 shows an example of a power supply system 100 according to exemplary aspects of the present invention. The power supply system 100 may be associated for example with an aircraft. The power supply system 100 may include a first power source 110 and a second power source 120. The first power source 110 and the second power source 120 may be coupled to an electric bus 130, for example a DC electric bus. One or more charges 132 (for example electric charges used by the aircraft) can be coupled to the electric bus 130.
    The first power source 110 may include a generator 112 configured to generate a three-phase AC current. The generator 112 may be coupled to a power converter 114 which may be controlled to convert the three-phase AC current to the DC output current, for application to the electric bus 130. In some embodiments, the generator 112 may be mechanically actuated by a gas turbine engine 102 associated with an aircraft via a transmission housing 104.
    Similarly, the second power source 120 may include a generator 122 configured to generate a three-phase AC current. The generator 122 may be coupled to a power converter 124 which may be controlled to convert the three-phase AC current to the DC output current, for application to the electric bus 130. In some embodiments, the generator 122 may be mechanically actuated by a gas turbine engine 106 associated with an aircraft through a transmission casing 108.
    The system may comprise a control system 200. The control system 200 may comprise one or more control devices, sensors and / or other control devices configured to perform different measurements (for example voltage and / or voltage measurements). current) and to control various aspects of the power system 100. In some embodiments, the control system 200 may include one or more processors and one or more memory devices. The memory devices may include computer-readable instructions, or other logic elements that, when executed by the one or more processors, cause the control system to fulfill the desired control functionality, for example implementing one or more current regulators, voltage regulators, or other control functions disclosed in the present disclosure.
    As shown in FIG. 1, the control system 200 can provide control signals to the first power source 110 and the second power source 120, in order to control the power output (e.g. the output voltage and / or the output current) by the first power source 110 and / or the second power source 120. For example, control signals may be provided to the converters 114, 124 to regulate the voltage and power outputs. current of the first power source 110 and the second power source 120, in order to achieve an uninterruptible power transfer, according to exemplary aspects of the present invention which will be discussed in more detail later.
    The control system 200 may also provide control signals to the contactor 115 and the contactor 125. The contactor 115 may be used to selectively couple and decouple the first power source 110 to the power bus 130. The switch 125 may be used to selectively couple and decouple the second power source 120 to the power bus 130.
    Embodiments of the present invention are described with reference to the multi-source power supply system 100 for use with an aircraft for illustrative and detailed purposes. Those skilled in the art, based on the explanations given herein, will understand that the object of the present invention can be used with any type of suitable multi-source power supply system, without departing from the scope of the present invention. present invention. For example, the multi-source power system may or may not be associated with an aircraft or other on-board power system. In some embodiments, the multi-source power system may include any combination of DC power sources and AC sources. In some embodiments, at least one of the power systems (e.g., only one of the power sources) may be associated with a power converter. The electric bus can be a DC electric bus or a CA bus.
    Fig. 2 shows aspects of an exemplary control system 200 for implementing the methods and control systems according to exemplary embodiments of the present invention. The system may include a control block 202 configured to generate power supply commands 252, 254 (e.g., current set point signals or other signals representing the desired output power allocation between the first source 110 power supply and the second power source 120). The control block 202 may address the power supply control 252 to a first control structure 210 associated with the first power source 110 and the power supply control 254 to a second control structure 220 associated with the second source. 120 power supply.
    As used herein, the terms "control structure" or "control block" refer to a logic or control circuit configured to implement one or more control functions, for example one or more of the functions of the control. control device, control loop functions, transformation functions, and other control functions discussed here. In some embodiments, a control structure may designate a set of instructions stored in a memory device that, when executed by one or more control devices (for example, a microprocessor (s), microcontroller (s), etc.), have the effect that the control device (s) fulfill the desired control functionality. The control logic can be implemented at any suitable location, for example by a separate control device or one or more control devices associated with the power supply system, for example the control system 200, the control device. control associated with the power source 110, the controller associated with the power source 120 or other suitable power source.
    The power supply controls 252, 254 may indicate a ratio between the load controlled by the respective power source 110, 120 and the total power to be supplied by the power sources 110 and 120 to the power bus 130. In embodiments, the power supply controls 252, 254 may include current setpoint components or may be used to derive current setpoint values to provide the desired output power allocation between the first and second power outputs. power source 110 and the second power source 120. For example, if it is desired that the second power source 120 does not provide power to the electric bus 130, a current reference of zero amperes can be provided as part of the power supply control 254 or may be derived from the power supply control 254 indicating that No power should be provided to the electric bus 130.
    The first control structure 210 may be configured to provide one or more control signals 262 to the first power source 110 to control the output voltage and / or the output current of the first power source 110. first control structure 210 may comprise a current regulator 212 and a voltage regulator 214. The current regulator 212 may be configured to regulate the output current of the first power source 110, based, at least in part , a current reference value signal (for example as part of the power supply control 252) and / or current feedback signals 272, 282. The current regulator 212 may for example be a integral proportional controller, a derivative proportional regulator, a derivative integral proportional regulator or other suitable regulator. The current feedback signal 272 may be provided by a sensor or other current measuring device configured to provide a signal indicative of the output current of the first power source 110. The current feedback signal 282 may be provided by a sensor or other current measuring device configured to provide a signal indicative of the output current of the second power source 120.
    The voltage regulator 214 may be configured to regulate the output voltage of the first power source 110, based, at least in part, on one or more voltage setpoint signals, a voltage feedback 274 indicating the output voltage of the first power source, and / or a voltage feedback signal 276 indicating a voltage of the electric bus. The voltage regulator 214 may for example be an integral proportional regulator, a derivative proportional regulator, a derivative integral proportional regulator or another suitable regulator. The voltage feedback signal 274 may be provided by a sensor or other voltage measuring device configured to provide a signal indicative of the output voltage of the first power source 110. The voltage feedback signal 276 may be provided by a sensor or other voltage measuring device configured to provide a signal indicative of the voltage of the electric bus 130.
    In some embodiments, the voltage regulator 214 may include a virtual resistor 216 programmed into the voltage regulator 214. The magnitude of the virtual resistor 216 may be calculated based on various operational parameters of the power system. The virtual resistor 216 may be used to regulate the output voltage of the first power source 110. For example, in some embodiments, the voltage regulator 214 may be configured to multiply the virtual resistance 216 by the output current. (eg as indicated by the current feedback signal 272) to obtain a voltage adjustment. The voltage regulator 214 may be configured to subtract the voltage adjustment from a voltage setpoint value used by the voltage regulator 214 when regulating the output voltage of the first power source 110. Thus, when implemented, the virtual resistor 216 may have a droop control feature.
    The first control structure 210 can also access a minimum voltage reference 213 and a maximum voltage reference 215. The first control structure 210 can use the minimum voltage reference 213 and the maximum voltage reference 215 to limit the signal. / the control signals 262 supplied to the first power source 110, so that the output voltage of the first power source 110 does not fall below the minimum voltage reference 213 or does not exceed maximum voltage reference 215.
    The second control structure 220 may be configured to provide one or more control signals 264 to the second power source 120 to control the output voltage and / or the output current of the second power source 120. second control structure 220 may comprise a current regulator 222 and a voltage regulator 224. The current regulator 222 may be configured to regulate the output current of the second power source 120, based, at least in part , a current reference value signal (for example as part of the power supply control 254) and / or current feedback signals 272, 282. The current regulator 222 may for example be a integral proportional controller, a derivative proportional regulator, a derivative integral proportional regulator or other suitable regulator. The current feedback signal 272 may be provided by a sensor or other current measuring device configured to provide a signal indicative of the output current of the first power source 110. The current feedback signal 282 may be provided by a sensor or other current measuring device configured to provide a signal indicative of the output current of the second power source 120.
    The voltage regulator 224 may be configured to regulate the output voltage of the second power source 120, based, at least in part, on one or more voltage setpoint signals, a voltage return 284 indicating the output voltage of the second power source, and / or a voltage feedback signal 276 indicating a voltage of the electric bus. The voltage regulator 224 may for example be an integral proportional regulator, a derivative proportional regulator, a derivative integral proportional regulator or other suitable regulator. The voltage feedback signal 284 may be provided by a sensor or other voltage measuring device configured to provide a signal indicative of the output voltage of the second power source 120.
    In some embodiments, the voltage regulator 224 may include a virtual resistor 226 programmed into the voltage regulator 224. The magnitude of the virtual resistor 226 may be calculated based on various operational parameters of the power system. The virtual resistor 226 may be used to regulate the output voltage of the second power source 120. For example, in some embodiments, the voltage regulator 224 may be configured to multiply the virtual resistor 226 by the output current. (e.g. as indicated by the current feedback signal 282) to obtain a voltage adjustment. The voltage regulator 224 may be configured to subtract the voltage adjustment from a voltage setpoint value used by the voltage regulator 224 when regulating the output voltage of the second power source 120. Thus, when implemented, the virtual resistor 226 may have a droop control feature.
    The first control structure 220 can also access a minimum voltage reference 223 and a maximum voltage reference 225. The second control structure 220 can use the minimum voltage reference 223 and the maximum voltage reference 225 to limit the signal. / the control signals 264 supplied to the second power source 120, so that the output voltage of the second power supply 120 does not fall below the minimum voltage reference 223 or does not exceed reference of maximum voltage 225.
    Fig. 3 shows a flowchart of an exemplary output power transfer method 300 from a first power source to a second power source having a power converter according to exemplary embodiments of the present invention. In some embodiments, the method 300 may be implemented using the control system shown in Fig. 2, or other suitable control device. In addition, Figure 3 shows steps performed in a particular order for purposes of illustration and study. Those skilled in the art, based upon this disclosure, will appreciate that various aspects of the methods disclosed herein may be modified, adapted, reworked, omitted or expanded in a variety of ways, without departing from the scope of the present invention.
    At 302, a transfer signal may be received, which indicates the transfer of power output from a first power source to the second power source. For example, a transfer signal may be received or generated by the control system 200 of Figure 1, indicating a transfer of power output to the power bus 130, from the first power source 110 to the second power source. 120. The transfer signal can be generated as part of the internal control logic of the control system 200 or be received from an external source, for example as a signal in response to an operator input. requesting an output power transfer.
    With reference to FIG. 3, in 304, the second power source can be initialized for transfer to the electric bus. For example, with reference to Fig. 1, the second power source 120 may be initialized for transfer to the power bus 130. In some embodiments, initializing the second power source for transfer to the power bus may include setting a current setpoint value for the current controller associated with the second power source, to a fixed current setpoint, for example about zero amperes. As used herein, the term "about zero amperes" refers to 10% of the rated current of the power supplies, or less.
    With reference to FIG. 2, by way of example, a current reference value associated with the current regulator 222 of the second control structure 220 associated with the second power source 120 can be set to approximately zero amperes. In some embodiments, the power supply control 254 addressed to the control structure 220 may include an element supplying a fixed current reference value of about zero amperes to the current regulator 222. The initialization of the second power source for transfer to the electric bus may further include regulating, using a voltage regulator, an output voltage of the second power source, based on a measured voltage of the electric bus. With reference to FIG. 2, by way of example, a voltage set point value for the voltage regulator 224 can be determined based, at least in part, on the voltage feedback signal 276 indicating the voltage of the electric bus. 130. In some embodiments, the voltage regulator can regulate the output voltage to match an electric bus voltage. When the electric bus is a DC bus, the adaptation to a voltage of the electric bus may include matching (for example bringing the up to 20%) to a value of a voltage associated with the electric bus. When the electric bus is an AC bus, the adaptation to a voltage of the electric bus may include the adaptation to a magnitude, a phase and a frequency of the electric bus.
    With reference to FIG. 3, at 306, the method may include coupling the second power source to the power bus, so that the first power source and the second power source are both coupled to the power supply. electric bus during a transfer period. For example, the control system 200 of FIG. 1 can control the switch 125 to couple the second power source 120 to the electric bus 130.
    After coupling the second power source to the power bus, the method may include assigning power output between the first power source and the second power source, such that the second power source power supply provides controlled output power to the electric bus during the transfer period, as shown at 308 in Fig. 3. Assigning power output between the first power source and the second power source, according to exemplary aspects of the present invention, may include controlling an output current of the second power source, based, at least in part, on a fixed current setpoint, d a current ramp and / or the implementation of a virtual resistor as part of the voltage regulator.
    For example, in one embodiment, a current regulator associated with the second power source can be activated based on a fixed current reference value, so that the output current of the second power source power supply is regulated to the fixed current setpoint. In some embodiments, the fixed current setpoint is about zero amperes, so that the second power source is controlled to provide no power to the electric bus during the transfer period. For example, the control signal 254 received by the control structure 220 from the control block 202 may be included or used to derive a fixed current setpoint of about zero amperes. The current regulator 222 can regulate the output current of the second power source 120 based, at least in part, on the current feedback signal 282 and the fixed current setpoint of about zero amps. so that a small, if any, output current is provided by the second power source 120 to the power bus 130 during the transfer period.
    In embodiments where a current regulator associated with the second power source receives a current feedback indicating the total current on the electric bus, the assignment of an output power to the electric bus, from the first source of power to the power source. power supply and the second power source, may include regulating, with the aid of a current regulator, an output current of the second power supply on the base, at least in part, of a current ramp during the transfer period. The current ramp can define a gradual increase in current during the transfer period. This increase can be linear, exponential, incremental increments, or other suitable forms of increase in current during the transfer period. In this embodiment, the current regulator may receive a current return at a time from the first power source and from the second power source, or another appropriate power return indicating the total current supplied to the bus. electric.
    In another embodiment, a virtual resistor can be implemented as a voltage regulator associated with the second power source. The virtual resistor can be used to regulate output power to the electric bus by adjusting the output voltage of the second power source as the output current of the second power source increases.
    With reference to FIG. 2, by way of example, the virtual resistor 226 programmed in the regulator 224 can be multiplied by an output current of the power source 120 (for example as determined from the return signal 282). to obtain an adjusted tension. The adjusted voltage can be subtracted from the voltage setpoint used by the voltage regulator 224 to regulate the output voltage of the power source 120. In this way, the output voltage can be reduced as the power is applied. output increases, thereby establishing a controlled output power from the second power source 120 to the power bus 130.
    As shown at 310 in FIG. 3, the method assigns the power according to (308) until the transfer period is defined as complete. The transfer period may be defined as terminated after the expiration of a predetermined period of time. In addition and / or alternatively, the transfer period may be defined as terminated after the occurrence of a trip condition, for example in the form of signals indicating that the first power source 110 is ready to be decoupled from the electric bus 130. At the end of the transfer period, the method comprises decoupling the first power source of the electric bus, as shown at 312 in FIG. 3. For example, the control system 200 can control the contactor 115 so that it decouples the first power source 110 of the electric bus 130. As soon as the first power source has been decoupled from the electric bus, the method may comprise stopping the regulation of the output current of the second supply source using the current regulator, as shown at 314 in FIG. 3. For example, the current regulator 222 may be disabled to that the output current of the power source 120 is no longer regulated to a fixed current reference value (for example zero amperes).
    In 316, the method may include regulating the output voltage of the second power source by using the voltage regulator based on a voltage setpoint. For example, the voltage regulator 224 may be used to regulate the output voltage of the second power source 120, based on a voltage setpoint value and a return signal 284 indicating the output voltage. of the second power source 120. The voltage set point can be set to a desired voltage of the electric bus 130. The output current supplied by the second power source can be based, at least in part, on the loads connected to the electric bus.
    In some embodiments, the controller change indicated at 314 and 316 in FIG. 3 can be accomplished in response to receiving a signal indicating that the first power source is decoupled from the power bus. The signal can be based for example on the detection of the state of the contactor which couples / decouples the first power source of the electric bus, a command from the control system and / or the expiration of a lapse of time. predefined time.
    FIG. 4 represents a flowchart of an exemplary method 400 for transferring output power from a second power source, comprising a power converter, to a first power source, in accordance with embodiments of FIG. present invention. In some embodiments, the method 400 may be implemented using the control system shown in Figure 2, or other suitable control device. In addition, Figure 4 shows steps performed in a particular order for illustration and study purposes. Those skilled in the art, based upon this disclosure, will appreciate that various aspects of the methods disclosed herein may be modified, adapted, reworked, omitted or expanded in a variety of ways, without departing from the scope of the present invention.
    At 402, a transfer signal may be received which indicates the transfer of output power from the second power source to the first power source. For example, a transfer signal may be received or generated by the control system 200 of Figure 2, indicating a transfer of power output to the power bus 130, from the second power source 120 to the first power source. 110. The transfer signal may be generated as part of the internal control logic of the control system 200 or may be received from an external source, for example as a signal in response to an operator input. requesting an output power transfer.
    In response to the transfer signal, the second power source may be initialized to transfer power output to the electric bus, as shown at 404 in FIG. 4. For example, the second power source 120 may be initialized to connect to the power bus 130. In some embodiments, initializing the second power source for transferring power output to the power bus may include setting a current setpoint for the controller current associated with the second power supply, on a fixed current reference value, for example about zero amperes. With reference to FIG. 2, by way of example, a current reference value associated with the current regulator 222 of the second control structure 220 can be set to approximately zero amperes.
    At 406 in FIG. 4, the method may include coupling the first power source to the power bus, so that the first power source and the second power source are both coupled to the power bus for a transfer period. For example, the control system 200 of Fig. 2 may control the switch 115 to couple the first power source 110 to the power bus 130. As soon as the first power source is coupled to the power bus, the method may comprise assigning an output power between the first power source and the second power source, so that the second power source provides controlled output power to the power bus during the transfer period, as shown at 408 in FIG. 4. The assignment of the output power between the first power source and the second power source, in accordance with exemplary aspects of the present invention, may include the control of an output current of the second power source based, at least in part, on a fixed current reference value, a current ramp (by example of a progressive decrease of the current) and / or the implementation of a virtual resistance as part of the voltage regulator associated with the second power source.
    For example, in one embodiment, a current regulator associated with the second power source can be activated based on a fixed current reference value, so that the output current of the second power source power supply is regulated to the fixed current setpoint. In some embodiments, the fixed current setpoint is about zero amperes, so that the second power source is controlled to provide no power to the electric bus during the transfer period.
    In embodiments where a current regulator associated with the second power source receives a current feedback indicating the total current on the electric bus, the assignment of an output power to the electric bus, from the first source of power to the power source. power supply and the second power source, may include regulating, with the aid of a current regulator, an output current of the second power supply on the base, at least in part, of a current ramp during the transfer period. The current ramp may define a progressive decrease in current during the transfer period. This decrease can be linear, exponential, stepwise increments, or other suitable forms of decreasing current during the transfer period. In this embodiment, the current regulator may receive a current return at a time from the first power source and from the second power source, or another appropriate power return indicating the total current supplied to the bus. electric.
    In another embodiment, a virtual resistor can be implemented as a voltage regulator associated with the second power source. The virtual resistor can be used to regulate the power output to the electric bus, adjusting the output voltage of the second power source, as the output current of the second power source increases, as discussed more high.
    As shown at 410, the method assigns power in accordance with 408, until the transfer period is defined as complete. The transfer period may be defined as terminated after the expiration of a predetermined period of time. In addition and / or alternatively, the transfer period may be defined as terminated after the occurrence of a trip condition, for example in the form of signals indicating that the second power source 120 is ready to be decoupled from the electric bus 130. At the end of the transfer period, the method comprises decoupling the second power source of the electric bus, as shown at 412 in FIG. 4. For example, the control system 200 can control the contactor 125 to decouple the second power source 120 of the electric bus 130.
    Although specific features of different embodiments are possibly shown in some drawings and not in others, this is solely for the sake of convenience. In accordance with the principles of the present invention, any feature of a design may be cited and / or claimed in combination with any feature of any other design.
    The present written description uses examples to explain the invention, including the preferred embodiment, and to enable anyone skilled in the art to practice the invention, including making and using any type of device or device. system and perform any type of process incorporated. The patentable scope of the invention is defined by the claims and may include other examples that are within the skill of the art. These other examples will fall within the scope of the claims, if they contain structural elements that are not different from the literal meaning of the terms of the claims, or if they have equivalent structural elements with non-substantial differences from each other. in the literal sense of the terms of the claims.
    List of marks 100 Fuel system 102 Gas turbine engine 104 Transmission housing 106 Gas turbine engine 108 Transmission housing 110 First power source 112 Generator 114 Power converter 115 Contactor 120 Second power source 122 Generator 124 Power converter 125 Contactor 130 Electric bus 132 Loads 200 Control system 202 Control block 210 First control structure 212 Current regulator 213 Minimum voltage reference 214 Voltage regulator 215 Maximum voltage reference 216 Virtual resistor 220 Second control structure 222 Current regulator 223 Minimum voltage reference 224 Voltage regulator 225 Maximum voltage reference 226 Virtual resistance 252 Power supply control 254 Power supply control 262 Control signal 264 Control signal 272 Current feedback signal 274 Signal from return from t current 276 Feedback signal 282 Current feedback signal 284 Voltage feedback signal 300 Process 302 Process step 304 Process step 306 Process step 308 Process step 310 Process step 312 Process step 314 Process step 316 Process Step 400 Process 402 Process Step 404 Process Step 406 Process Step 408 Process Step 410 Process Step 412 Process Step
    权利要求:
    Claims (10)
    [1" id="c-fr-0001]
    A method of transferring output power to an electric bus (130) between a first power source (110) and a second power source (120), the method comprising: regulating, using a voltage regulator (224), an output voltage of the second power source (120) based, at least in part, on a measured voltage of the electric bus (130); coupling the second power source (120) to the power bus (130) so that the first power source (110) and the second power source (120) are both coupled to the power bus (130) during a transfer period; during the transfer period, assigning the power output to the power bus (130) between the first power source (110) and the second power source (120), so that the second power source power supply (120) provides controlled output power to the electric bus (130); and decoupling the first power source (110) from the electric bus (130) at the end of the transfer period.
    [2" id="c-fr-0002]
    Method according to claim 1, characterized in that, prior to the coupling of the second power source (120) to the electric bus (130), the method comprises setting a current setpoint value for a voltage regulator. current (222) associated with the second power source (120) to a fixed current setpoint.
    [3" id="c-fr-0003]
    3. Method according to claim 2, characterized in that the fixed current reference value is about zero amperes.
    [4" id="c-fr-0004]
    4. Method according to claim 1, characterized in that, after the decoupling of the first power source (110) of the electric bus (130), the method further comprises the regulation, using the voltage regulator ( 224), the output voltage of the second power source (120).
    [5" id="c-fr-0005]
    Method according to claim 1, characterized in that the assignment of an output power to the electric bus (130) from the first power source (110) and the second power source (120) comprises the regulation with a current regulator (222), an output current of the second power source (120) based, at least in part, on a fixed current reference value, during the transfer period.
    [6" id="c-fr-0006]
    The method of claim 1, characterized in that the output power assignment to the electric bus (130) from the first power source (110) and the second power source (120) comprises the regulation, using a current regulator (222), an output current of the second power source (120), in accordance with a current ramp during the transfer period.
    [7" id="c-fr-0007]
    Method according to claim 5, characterized in that, after the decoupling of the first power source (110) of the electric bus (130), the process terminates the regulation of the output current of the second power source. power supply (120) using the current regulator (222).
    [8" id="c-fr-0008]
    The method of claim 1, characterized in that the power output assignment to the electric bus (130) from the first power source (110) and the second power source (120) comprises the regulation, using the voltage regulator (224), the output voltage of the second power source (120) to base, at least in part, a virtual resistor (226), so that the output voltage of the second power source (120) is reduced as an output current supplied by the second power source (120) is increased.
    [9" id="c-fr-0009]
    The method according to claim 1, characterized in that the method further comprises: setting a current setpoint value of a current regulator (222) associated with the second power source (120), on a fixed current setpoint of about zero amperes; coupling the first power source (110) to the power bus (130) so that the first power source (110) and the second power source (120) are both connected to the power bus (130) during a second transfer period; and during the second transfer period, regulating an output current of the second power source (120) based at least in part on the fixed current setpoint of about zero amperes; and decoupling the second power source (120) from the electric bus (130) at the end of the second transfer period.
    [10" id="c-fr-0010]
    An electrical power system, comprising: a first power source (110); a second power source (120), the second power source comprising a power converter (124); an electric bus (130) configured to be selectively coupled to the first power source (110) and configured to be selectively coupled to the second power source (120); a control system (200) comprising a current regulator (222) configured to regulate an output current of the power converter (124), the control system further comprising a voltage regulator (224) configured to regulate a voltage of output of the power converter (124); knowing that when the control system receives a transfer signal indicating the triggering of an output power transfer to the electric bus (130), from the first power source (110) to the second power source (120) the voltage regulator (224) is configured to regulate the output voltage of the second power source (120) to match a voltage associated with the electric bus (130), and a current setpoint for the current regulator (222) is set to a fixed current setpoint of about zero amperes.
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    同族专利:
    公开号 | 公开日
    BR102016024732A2|2017-07-25|
    CA2945907A1|2017-04-30|
    US20170126018A1|2017-05-04|
    GB2545314A|2017-06-14|
    CN106873708A|2017-06-20|
    CN106873708B|2018-07-13|
    JP2017085880A|2017-05-18|
    US9966764B2|2018-05-08|
    GB201617978D0|2016-12-07|
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    法律状态:
    2017-10-25| PLFP| Fee payment|Year of fee payment: 2 |
    优先权:
    申请号 | 申请日 | 专利标题
    US14/927,631|US9966764B2|2015-10-30|2015-10-30|No break power transfer for multi-source electrical power system|
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