• 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:
    Device for the control of switches (4, 5) arranged to connect at least two sources of electrical energy (1, 2) to an electric load (8) as a function of the availability of said sources, and comprising: - circuits control system, - a power bus (63), - a first (61) and a second (62) voltage converter arranged to respectively convert a first voltage (Us1) of the first power source (1) and a second voltage (Us2) and the second power source (2) to an intermediate voltage (Ui) for supplying the power supply bus (63), - a third voltage converter (64) arranged to convert the voltage (Ui) of the power supply bus into a utilization voltage (Uc) to supply the control circuits. The invention also relates to a source inverter comprising such a device as well as a method for powering the control device.
    公开号:FR3054737A1
    申请号:FR1657195
    申请日:2016-07-27
    公开日:2018-02-02
    发明作者:Alain RET
    申请人:Schneider Electric Industries SAS；
    IPC主号:
    专利说明:

    TECHNICAL AREA
    The invention relates to a device for monitoring and controlling at least first and second switches arranged to connect respectively at least a first and a second source of electrical energy to an electrical load depending on the availability of said sources.
    The invention also relates to a source inverter intended to connect a first and a second source of electrical energy respectively to an electrical load depending on the availability of said sources.
    The invention also relates to a method for supplying a device intended for the control-command of a source inverter.
    STATE OF THE ART
    The availability of electrical energy is important, among other things for hospitals, for production industries that do not support unexpected shutdowns or for installations operating with large IT resources. Indeed, a power supply cut can generate significant damage: loss of production, loss of data and worse loss of human life.
    To avoid such consequences, a device generally called a source inverter is used: as soon as the main source of energy is no longer available, the source inverter automatically switches the arrival of electrical energy to a second source of energy. energy available. This second source is generally a generator, but can be a different power line or an output from a redundant transformer in the electrical installation. In addition, it is more and more common to have several other energy sources in order to compensate for any failure of the second source, for example a failure to start the generator set or maintenance operations for the power line.
    The second source provides power as long as the main source is unavailable. When it becomes available again, the source inverter usually disconnects the second source to automatically reconnect the user to the main source. Depending on the user's needs, other modes of transition to a return to a normal situation may exist.
    As the operational safety and security of property and / or people is at stake, the operation of the source inverter must be reliable and without malfunction: for example, it is prohibited to simultaneously connect two or more desynchronized sources in order to avoid unacceptable overcurrents and voltage variations. For this, for example in the simplest inverters having only two sources, the control of one of the switches is connected in series with a state sensor of the other switch and vice versa in order to ensure electrical self-locking. switches. However, as soon as the installation has more than two sources, the wiring complexity becomes greater, with the risk of incorrect wiring when mounting the source inverter.
    This complexity increases further when the power of the electrical installation exceeds several hundred amperes: the switches used can be power circuit breakers providing the additional short-circuit protection function. These power circuit breakers have a more complex operation than simple contactors, in particular their operation requires a rearming step between opening and closing, they can be plugged in or out for maintenance operations. The auxiliaries indicating their state are therefore more numerous than in the case of a simple contactor.
    Furthermore, the electrical isolation between the different sources and their auxiliaries must be guaranteed in order to avoid untimely looping between the circuit of the main source and the circuit of the second source, which could be the cause of a serious short circuit. between sources.
    In addition, since the electrical installations must be adapted to the development of the activity and the availability of energy being more and more demanded by the users, it is necessary to be able to easily change a source inverter without risk for goods and the people.
    Finally, in the event of a failure in the supply of energy, it becomes vital to be able to diagnose the origin of the fault in order to remedy it as quickly as possible.
    Document FR 3 026 245 is known which describes an interconnection device intended to secure and facilitate connection in a source inverter. This device includes a pre-wiring facilitating the interconnection of the switches and the control-command box of the source inverter. Although it provides an answer to the problem of simplifying wiring and reducing the risk of wiring error, the interconnection device does not easily allow the integration of a third energy source since, in this case , new wiring harnesses will have to be made.
    Document US Pat. No. 7,259,481 is known, describing a source inverter capable of adapting to a wide range of voltage variation delivered by the second source. It is suitable for an electrical network comprising only two sources and does not have a galvanic separation between the two sources. The failure of a diode in the rectifier stage can create an accidental connection between the main source circuit and the second source circuit leading to a short circuit between the two sources. On the other hand, the invention is dedicated to a reduced power installation: the relay used to switch the sources is not suitable for a high power industrial installation using power switches having opening and closing modes in many stages. Finally, it does not easily allow the integration of a third source, the relay used having only two possible states.
    STATEMENT OF THE INVENTION
    In order to remedy the abovementioned drawbacks of the state of the art, the invention provides a device intended for the control-command of at least a first and a second switch arranged to connect at least a first and a second energy source, respectively. electric to an electric charge depending on the availability of said sources, said device comprising:
    - a driving circuit,
    - control-command circuits,
    - a power bus,
    a first voltage converter comprising an input connected to the first energy source and an output connected to the supply bus, and arranged to convert a first voltage of the first energy source into an intermediate voltage to supply the bus d 'food,
    a second voltage converter comprising an input connected to the second energy source and an output connected to the supply bus, and arranged to convert a second voltage of the second energy source into an intermediate voltage to supply the bus d 'food,
    - a third voltage converter arranged to convert the intermediate voltage of the supply bus into a voltage of use for supplying the control-command circuits.
    Preferably, the control-command circuits include:
    - a circuit for controlling the activation of the switches and / or
    - a circuit for monitoring the state of the switches and / or
    - a circuit for determining the availability of sources.
    Preferably, the first and second conversion means comprise galvanic isolation between the first source of electrical energy and the power bus respectively, and between the second source of electrical energy and the power bus.
    Preferably, the first voltage converter converts the first voltage from the first energy source into an intermediate voltage when the first voltage is above a first threshold. Similarly, the second voltage converter converts the second voltage from the second energy source into an intermediate voltage when the second voltage is above a second threshold.
    Advantageously, the intermediate voltage is a direct voltage.
    Preferably, the operating voltage is substantially equal to the nominal operating voltage of the control-command circuits. Advantageously, an emergency power supply device is connected to the power bus to deliver the intermediate voltage to said power bus when the first and second energy sources are unavailable.
    Advantageously, the emergency power supply device comprises an energy storage means arranged to be charged under a storage voltage when the first and / or the second energy source is available.
    According to a preferred embodiment, the intermediate voltage is substantially equal to the storage voltage of the energy storage means of the backup device.
    Preferably, the control circuit is connected to the supply bus for its supply.
    The subject of the invention is also a source inverter intended to connect respectively a first or a second source of electrical energy to an electrical load depending on the availability of said sources, said source inverter comprising:
    - at least a first and a second switch,
    - at least two control auxiliaries, each auxiliary being intended to respectively control a switch,
    one or more state sensors, each state sensor cooperating respectively with a switch to detect the state of said switch, and
    - a control-command device comprising one or more of the characteristics described above.
    Preferably, the input of the first conversion means is connected between the first source and the first switch, and the input of the second conversion means is connected between the second source and the second switch.
    The invention also relates to a method for supplying a device intended for the control of a source inverter comprising one or more of the characteristics described above, said method comprising the following steps:
    - the conversion of the first voltage of the first energy source into an intermediate voltage to supply the supply bus by means of a first voltage converter,
    - the conversion of the second voltage from the second energy source into an intermediate voltage to supply the power bus by means of a second voltage converter,
    the conversion of the voltage of the supply bus into a working voltage by means of a third voltage converter.
    The method further comprises the following steps in the event of the presence of an emergency power supply device:
    the supply by the emergency supply device of the intermediate voltage 15 to the supply bus when the two means for converting the first voltage or the second voltage do not work, otherwise,
    - recharging the storage means of the emergency power supply device when the intermediate voltage is supplied by at least one of the means for converting the first voltage or the second voltage.
    Thus, all the auxiliaries of the switches are supplied by a single operating voltage, galvanically isolated and independent of the various energy sources, of stable and controlled amplitude. This arrangement simplifies the wiring diagram of the auxiliaries and therefore minimizes the risk of wiring errors, while allowing easy extension to additional energy sources.
    BRIEF DESCRIPTION OF THE DRAWINGS
    Other advantages and characteristics will emerge more clearly from the description which follows, of particular embodiments of the invention, given by way of nonlimiting examples, and represented in the appended drawings in which:
    - Figure 1 is a schematic representation of an electrical installation comprising a source inverter;
    - Figure 2 is a schematic representation of a source reversing device implemented in the prior art;
    - Figure 3 is a schematic representation of a source reversing device implemented with a control device of the invention, in a preferred embodiment;
    - Figure 4 is a flowchart illustrating a method of supplying the control-command device of a source inverter.
    DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
    In the description, the term "a source is available" will be used to describe a source capable of delivering electrical energy. A source can deliver electrical energy in polyphase form, and in this case generally three-phase, or even single-phase or continuous.
    The term "switch" will be used to preferentially name an electrical circuit breaker but may also denote a contactor, one of the channels of a double contactor, a relay or a static electronic semiconductor switch.
    The term "upstream connection" will be used to name a link to an energy source, the term "downstream connection" will be used to name a link to an energy receiver.
    Figure 1 is a conventional schematic representation of an electrical installation comprising a source inverter. A main source 1 supplies electrical energy to one or more loads 8. A load 8 can be a piece of equipment or a set of several pieces of equipment the operation of which must not be interrupted, a technical zone containing pieces of equipment having to be supplied continuously or a building whose energy supply has a vital aspect. A switch 4, connected upstream to the source 1 and downstream to a busbar 7, establishes the link between the source 1 and the busbar 7. The load 8 is connected to the busbar 7. The switch 4 can be a contactor, a relay, a circuit breaker.
    In the event of unavailability of the main source 1, for example following a cable break or a short circuit upstream of the installation, a second source 2 of electrical energy is used to continue to supply the load 8. This second source could be a local generator such as a generator. A switch 5, connected upstream to the second source 2 and downstream to the busbar 7, establishes the link between the second source 2 and the busbar 7.
    It may happen that the first source 1 and the second source 2 are available simultaneously. These two sources are generally not synchronized and therefore not being in phase with one another, it is imperative that they are not connected simultaneously to the busbar 7. One of the roles of the source inverter and to avoid this situation. For this, an interlocking device 6 prevents the closing of a switch if the other switch is already closed. However, the two switches can be opened simultaneously, thereby separating the busbar from each energy source, for example to perform maintenance operations on the load.
    Figure 2 is a schematic representation of a source reversing device as described in the prior art. A device 3 is intended for controlling the switches 4 and 5. The device 3 is supplied from energy sources 1 and 2 by means of a power supply 39. This low power supply is connected to energy sources 1 and 2 and takes the energy from each of the sources, for example through semiconductor rectifiers followed by a voltage regulation, not shown in FIG. 2. A circuit 31 provides information concerning the source or sources available to a circuit 32 and an auxiliary source inverter 38 by means of a link 33. Said auxiliary source inverter is connected upstream to sources 1 and 2 and downstream to contacts 36 and 37. Its function is to select the source d power available to draw the energy required to activate switches 4 and 5, without creating an electrical connection between sources 1 and 2. An overcurrent protection device 11, such as a circuit breaker, prot removes the electrical connection between the source 1 and the source inverter 38 against any overcurrent related to a short circuit at the level of the source inverter 38 or downstream of it. Likewise, an overcurrent protection device 21 protects the electrical connection between the source 2 and the source inverter 38 against any overcurrent linked to a short circuit at the level of the source inverter 38 or downstream thereof. this.
    A device such as the power supply 39 cannot be used to control the activation of the switches, the demanded power being too great, for example when the switches 4 and 5 are high power circuit breakers.
    The function of the control circuit 32 is to control the contacts 36 and 37 according to the information on the availability of sources 1 and 2 delivered by the circuit 31.
    The switch 4 is composed of a set of contacts 41 for establishing the connection between the source 1 and the busbar 7 when the contacts 41 are closed and for opening said connection when the contacts 41 are open. A control auxiliary 43 controls the closing and opening of the contacts 41 by transforming a command received by the link 44 into action for the opening and closing of the contacts 41. At least one status sensor 42 gives information on the open or closed state of the contact 41. Generally, this state sensor is an electrical contact called "auxiliary contact". It is mechanically linked to the contacts 41 and has no electrical connection with the contacts 41 or with the control auxiliary 43. Preferably, the electrical contact of the state sensor is closed when the contacts 41 are open, and open when the contacts 41 are closed, as shown in FIG. 2.
    Likewise, the switch 5 is composed of a set of contacts 51 for establishing the connection between the secondary source 2 and the busbar 7 when the contacts 51 are closed and for opening said connection when the contacts 51 are open. A control auxiliary 53 controls the closing and opening of the contacts 51 by transforming a command received by the link 54 into action for the opening and closing of the contacts 51. At least one status sensor 52 gives information on the open or closed state of the contact 51. Like the sensor 42, this state sensor is an electrical contact called "auxiliary contact". It is mechanically linked to the contacts 51 and has no electrical connection with the contacts 51 or with the control auxiliary 53. Preferably, the electrical contact of said state sensor is closed when the contacts 51 are open, as shown in Figure 2, and open when the contacts 51 are closed.
    For the sake of clarity in FIG. 2, the connection between the source 1 and the busbar 7 or the connection between the source 2 and the busbar 7 are shown in the form of a current line. In the case of a three-phase network, this line generally consists of four conductive lines corresponding to the three phases and to the neutral conductor. The contact set 41 then comprises four contacts. Likewise, the set of contacts 51 comprises four contacts. Other variants are possible: for a single-phase network the set of contacts will have two contacts, for a three-phase network without neutral the set of contacts will have three contacts.
    The state sensors 42 and 52 are preferably electromechanical components. They can also be produced by devices comprising electronics: sensors for the position of the contacts 41, 51 with optical or magnetic detection and output of the position information in "all or nothing" form by means of electromechanical relays, static electronic contacts or a digital communication bus.
    The contact 36 is connected by the link 55 to the state sensor 52, itself connected by the link 44 to the control auxiliary 43 of the switch 4.
    Similarly, the contact 37 is connected by the link 45 state sensor 42, itself connected by the link 54 to the control auxiliary 53 of the switch 5.
    The closure of contact 36 controls the supply of the control auxiliary 43, linked to contact 41 of switch 4 to actuate the closure of contact 41, when the state sensor 52 is closed. Thus, the connection between the source 1 and the busbar 7 is established by the contact 41, the load 8 is supplied with energy. When the contact 52 is open, corresponding to a closed contact 51, the closing of the contact 36 has no effect on the contact 41. It is therefore not possible to simultaneously close the contacts 41 and 51 which constitutes a electrical interlocking of switches 4 and 5.
    Similarly, closing the contact 37 controls the supply of the control auxiliary 53 mechanically linked to the contact 51 of the switch 5 to actuate the closing of the contact 51 when the contact 41 is open. Thus, the connection between the source 2 and the busbar 7 is established, the load 8 is supplied with energy.
    As shown in FIG. 2, in the case where the main source 1 is available, the control circuit 32 sends an order to close the contact 36 and an order to open the contact 37. The auxiliary source inverter 38 makes the connection between the source 1 and a common point of the contacts 36 and 37. Thus, the order to close the contact 36 will have the effect of supplying the control auxiliary 43 of the switch 4 and of activating the closing of the switch 4 while the order of opening the contact 37 will have the effect of cutting off the supply of the electromechanical member 53 of the switch 5 and of opening the switch 5. The load 8 connected to the busbar 7 will be supplied by the source 1. Source 2 will be isolated, not connected to busbar 7.
    In the event of unavailability of the source 1, and if the second source 2 is available, the control circuit 32 controls the opening of the contact 36 and the closing of the contact 37. Thus the switch 4 will be open and the switch 5 will be closed , the load 8 connected to the busbar 7 will be supplied by the secondary source 2. The source 1 will be isolated, not connected to the busbar 7.
    In the event of unavailability of the two sources, the power supply 39 does not have a power source, the control-command device 3 does not work, the contacts 36 and 37 are open and consequently the switches 4 and 5 are open , load 8 is not supplied.
    A source inverter is a device used in emergency situations to provide emergency power to a critical load, its operation must be very safe. In particular, the source 1 and the secondary source 2 generally do not have to be connected simultaneously to the busbar 7. The schematic representation of FIG. 2 thus illustrates a particular mode of simple electrical interlocking, requiring processing means of reduced data in the control circuit 32.
    This type of source inverter has drawbacks, however:
    - the use of more than two energy sources quickly complicates the wiring diagram. Indeed, in the case where there are n sources, it is necessary to put in series n-1 state sensors 42, 52 in order to allow the closing of a single contact 41, 51 only when all the others are open. This complexity is manifested by significant wiring,
    - the power supply to the control members 43, 53 being taken directly from the link with the main source 1 and secondary 2, any voltage variation or disturbance will be passed on to the control auxiliary. In particular, the second source 2 often being a generator set that can have a fluctuating speed of rotation depending on its load and the quality of its regulation, the voltage delivered may be outside the specification of the control auxiliary. An auxiliary being supplied in a voltage range outside its specification can be damaged or have an inefficient operation, and finally
    - the electrical insulation between the two sources 1, 2 can be broken by an insulation fault at the level of the contacts in the auxiliary source inverter 38 or also by a failure to synchronize the closing of said contacts can be at the origin a short circuit between source 1 and second source 2. To eliminate this risk, protective means 11 and 21, such as circuit breakers or fuses, must be used. This increases the cost and wiring of the source inverter.
    Figure 3 is a schematic representation of a source reversing device implemented with a control device 3 of the invention, in a preferred embodiment.
    An AC / DC voltage converter 61 is connected between the source 1 and a supply bus 63. This converter transforms a first voltage Us1 generated by the source 1, for example 400 Volt 50 Hz, applied to its input, into a voltage intermediate Ui, delivered by its output to the supply bus 63, for example 24 Volt, this value being given by way of non-limiting example. The AC / DC voltage converter 61 is an autonomous component which performs the voltage conversion as soon as the first voltage Us1 applied to its input exceeds a first minimum threshold Us1_mini, for example Us1_mini = 50 Volt.
    A second AC / DC voltage converter 62 is connected between the secondary source 2 and the power bus 63.
    Identically to the converter 61, the second voltage converter 62 transforms a second voltage Us2 generated by the secondary source 2, applied to its input, into an intermediate voltage, Ui, delivered by its output to the supply bus 63. It performs , autonomously, the voltage conversion as soon as the second voltage Us2 exceeds a second minimum threshold Us2_mini.
    According to a preferred embodiment, the first voltage Us1 and the second voltage Us2 are alternating voltages, the intermediate voltage Ui is a direct voltage.
    The values of the voltage thresholds Us1_mini and Us2_mini at the input of the voltage converters 61 and 62 are independent of each other. For practical reasons, the AC / DC converters 61 and 62 being preferably identical, the first and second voltages Us1 and Us2 being of generally close amplitude, the threshold Us2_mini is preferably substantially equal to the threshold Us1_mini.
    Advantageously, the voltage converters 61 and 62 are dimensioned to operate on a large dynamic range of input voltage Us1 and Us2 in order to allow installation of the source reversing device under very varied conditions of use without requiring any particular adaptation or a significant number of industrial variants. The voltage range Us1 or Us2 acceptable by AC / DC voltage converters 61 or 62 is, for example, from 60 Volt to 600 Volt. In addition, the voltage converters 61 and 62 are arranged according to the known technique to operate without modification in an electrical installation whose sources 1 and 2 have a frequency between a few Hertz and several hundred Hertz, for example from 16.33 Hz up to at 400 Hz.
    Advantageously, each voltage converter 61.62 has internal galvanic isolation between its input and its output. This insulation is generally carried out by a transformer. There is no direct connection between the input and the output of the converter, the transfer of energy being done by exchange of magnetic flux in the transformer. The risk of accidental electrical connection between sources 1 and 2 is thus extremely reduced.
    The power bus 63 preferably supplies power to the control circuit 32. Said control circuit 32 is connected to command-control circuits 65, 66 for controlling switches 4 and 5 according to the availability of sources 1 or 2 and controlling if the orders have been placed correctly. As an option, the control circuit 32 may include a communication link 67 intended for the communication of state information or the reception of commands from an external device, for example a supervisor. This link 67 is particularly useful for diagnosing an operating anomaly by allowing the availability information of the sources 1, 2 and the state sensors 42, 52 to be raised.
    The input of a DC / AC voltage converter 64 is connected to the supply bus 63. The voltage converter 64 transforms the intermediate voltage Ui, present at its input, into a use voltage Uc to supply the circuits of Remote control. The voltage converter 64 performs the voltage conversion as soon as the intermediate voltage Ui is present at its input.
    The operating voltage Uc is independent of the voltages Us1, Us2 or Ui, the value of the amplitude of the voltage Uc can therefore be freely chosen.
    In practice, it is the nominal operating voltage chosen for the control-command circuits which fixes the amplitude of the operating voltage Uc supplied by the voltage converter, preferably from values commonly used in Europe or the United States or linked to local habits. For example, a working voltage Uc of amplitude 240 Volt and frequency 50 Hz is suitable for many control-command circuits in Europe and in China, in particular for control auxiliaries 43, 53 or status sensors 42, 52. A use voltage Uc of amplitude 400 Volt and frequency 50 Hz is also very widespread in industrial environments. For the United States market, a working voltage of 120 Volt amplitude and frequency 60 Hz will be perfectly suitable. Thus the cost and the availability of control-command circuits is optimal because these circuits will be widespread. However, the use of the DC / AC 64 voltage converter makes it possible to take into account local specificities of the electrical installation. It is thus possible to provide another voltage amplitude and another frequency without having to change the voltage converter 64: the configuration of the converter to define the amplitude and the frequency of the operating voltage Uc can be carried out for example by factory, during the manufacture of the source reverser or during the implementation on site.
    The use of the DC / AC converter 64 makes it possible to guarantee a stable voltage and frequency of the operating voltage Uc independently of the fluctuations in the voltages Us1 or Us2 supplied by the sources 1 or 2. Thus the control-command circuits operate in the nominal voltage range for which they are designed. The risk of malfunction of said circuits due to operation outside specification is therefore eliminated. It is also possible to use control-command circuits whose supply voltage ranges are reduced and therefore circuits are less expensive.
    The control circuits include:
    a circuit 65 for controlling the activation of the switches and / or
    - A circuit 66 for monitoring the state of the switches and / or
    a circuit 31 for determining the availability of sources.
    Circuit 65 controls the activation of switches 4 and 5. It is connected upstream to control circuit 32 to receive orders to open or close switches 4 and 5 and downstream to links 45 and 55.
    A command to activate switch 4 from circuit 65 is routed via link 55 to the status sensor 52. When the status sensor 52 is closed, the command is routed through link 44 to the control auxiliary 43 of the switch 4. An activation command of the switch 5 will follow a similar path through the link 45, the status sensor 42, the link 54 and the control auxiliary 53.
    In the same way as in FIG. 2, the switches 4 and 5 are interlocked.
    Circuit 65 is connected downstream of the DC / AC converter 64 for its power supply. It receives a voltage Uc.
    The circuit 66 is intended to control the state of the state sensors 42 and 52. It is connected upstream to the control circuit 32 and connected downstream to the state sensors 42 and 52. In a preferred embodiment, the circuit 66 polarizes the state sensors 42 and 52 of switches 1 and 2 in order to determine whether said contacts are open or closed and transmits the state of the state sensors to the control circuit 32.
    The state control circuit 66 may include other inputs: for example, when the switches 4, 5 are withdrawable power circuit breakers, the circuit 66 may include inputs relating to the racked-in or racked-out state, the state armed or tripped switches 4.5.
    Circuit 66 is connected downstream of the DC / AC converter 64 for its power supply. It receives a voltage Uc.
    For reasons of manufacturing economy and / or rationalization of the functions, the circuits 65 and 66 can be arranged in a single module, connected downstream of the DC / AC converter 64 by a single link for its power supply.
    The circuit 31 provides information on the availability of the sources 1, 2 to the control circuit 32. It can receive its supply from the supply bus 63 or be connected downstream from the DC / AC converter 64. In a preferred embodiment , the circuit 31 draws its energy directly from the sources 1 and 2 to which it is connected, as shown in FIG. 3.
    Optionally, a backup power device 68 is connected to the power bus to deliver power to the power bus 63 when the first and second power sources 1, 2 are unavailable. The power supply device 68 preferably comprises an electrical energy storage means such as a battery or a set of capacitors, not shown in FIG. 3. It includes recharging circuits for recharging the means of energy storage, under a storage voltage Ust, when at least one of the converters 61, 62 is in operation. It also comprises circuits making it possible to detect the absence of intermediate voltage Ui on the supply bus when the two converters 61 and 62 are not in operation and circuits for delivering, in this case, an intermediate voltage Ui to the bus d supply by taking the necessary energy from the energy storage means.
    The intermediate voltage Ui is independent of the source voltages Us1, Us2 and the operating voltage Uc. The intermediate voltage Ui can therefore be freely chosen. Preferably, it is fixed at a value making it possible to make the design simple. In the case where an emergency supply device 68 is connected to the supply bus 63, it is advantageous to set the voltage Ui to a value substantially equal to the nominal storage voltage Ust of the energy storage means of the device backup 68. For example Ust = 24 Volt or 48 Volt which are voltages conventionally used for storage means using one or more batteries connected in series. In the absence of an emergency supply device 68, the intermediate voltage Ui can be fixed to be suitable for supplying the control circuit 32, for example 5 or 12 Volt. More generally, the higher the intermediate voltage Ui, the lower the current in the supply bus 63. The energy lost by the Joule effect will be less important.
    Preferably, the control circuit 32 includes a man-machine interface allowing an operator to carry out any control or command operation of the source inverter, for example in the maintenance phase. Advantageously, when no source is available and there is an emergency power supply device 68, an operator can view the availability state of the first and second sources 1 and 2 given by the circuit 31 and the state of the switches 4 and 5 given by the state control circuit 66 to provide a diagnosis.
    As a variant, the AC / DC voltage converters 61, 62 can supply the source availability information 1,2 directly to the control circuit 32 by means of a direct link, not shown in FIG. 3. The circuit 31 of determination of the availability of the sources is no longer necessary, the cost of the control circuit 32 is reduced.
    The architecture of the control-command device 3 as presented in FIG. 3 has several advantages:
    - the control-command device 3 can easily be adapted to a configuration having n sources, by adding as many AC / DC voltage converters 61,62 as additional sources 1,2;
    - galvanic isolation is ensured between the control auxiliaries, the control-command circuits and the sources;
    - the control auxiliaries are supplied by a use voltage Uc independent of the first and second source voltages Us1 and Us2. The operating voltage of the control auxiliaries can therefore be standardized, which allows a reduction in the number of variant control auxiliaries, leading to savings on the cost of the product;
    - the operating voltage Uc is independent of one of the voltages Us1 or Us2 of the sources or of the component of said voltages Us1 or Us2 or even of the intermediate voltage Ui. This advantage is particularly advantageous in a three-phase energy distribution regime, when the neutral is not distributed downstream from sources 1 and 2. Unlike the device described in the prior art illustrated in FIG. 2, it is possible to supply the control-command circuits under a voltage equal to the single voltage: to illustrate this advantage, when Us1 and Us2 are equal to 400 Volt between phases, the operating voltage Uc can be fixed at 240 Volt. This advantage makes it possible to use control circuits having a supply voltage of 240 Volt, which are less expensive and more widespread than equivalent circuits operating at a voltage of 400 Volt. This configuration is impossible to achieve with the device of the prior art since the connections for the supply of the control auxiliaries 43 and 53 come directly from the sources and therefore without the possibility of connection to a neutral link when the latter does not does not exist.
    FIG. 4 is a flow diagram of a method for supplying the device 3 intended for the control of a source inverter.
    A step 100 consists in converting the first voltage Us1 of the first energy source 1 into an intermediate voltage Ui to supply the power bus 63 by means of a first voltage converter 61.
    At the same time, a step 101 consists in converting the second voltage Us2 from the second energy source into an intermediate voltage Ui to supply the power bus 63 by means of a second voltage converter 62.
    Following one or the other of the preceding steps, a step 102 consists in converting the intermediate voltage Ui of the supply bus 63 into a use voltage Uc.
    When the first energy source 1 and the second energy source 2 are unavailable and in the absence of an emergency power supply device 68, step 102 is not executed, the operating voltage Uc n ' is therefore not provided.
    When an emergency power supply device 68 is present, two cases arise:
    step 103 is executed when the intermediate voltage Ui is not delivered by conversion of one of the first or second voltage, Us1 or Us2: the emergency supply device 68 supplies an intermediate voltage Ui available on the bus d power supply 63 and step 102 can be executed,
    - when the intermediate voltage Ui is delivered by conversion of one of the first or second voltage Us1 or Us2, step 102 is executed and in parallel step 104 is executed: the emergency power supply device 68 recharges its storage means by taking energy from the power bus 63.
    权利要求:
    Claims (14)
    [1" id="c-fr-0001]
    1. Device (3) intended for the control-command of at least a first and a second switch (4, 5) arranged to connect respectively at least a first (1) and a second (2) source of electrical energy to a electric charge (8) depending on the availability of said sources, said device comprising a control circuit (32) and control-command circuits, characterized in that it comprises:
    - a power bus (63),
    - a first voltage converter (61) comprising an input connected to the first energy source (1) and an output connected to the supply bus (63), and arranged to convert a first voltage (Us1) from the first source of energy into an intermediate voltage (Ui) to supply the supply bus (63),
    - a second voltage converter (62) comprising an input connected to the second energy source (2) and an output connected to the supply bus (63), and arranged to convert a second voltage (Us2) from the second source energy (2) into an intermediate voltage (Ui) to supply the supply bus (63),
    - a third voltage converter (64) arranged to convert the intermediate voltage (Ui) of the supply bus (63) into a working voltage (Uc) to supply the control-command circuits.
    [2" id="c-fr-0002]
    2. Device according to claim 1 characterized in that the control-command circuits comprise:
    - a circuit (65) for controlling the activation of the switches and / or
    - a circuit (66) for monitoring the state of the switches and / or
    - A circuit (31) for determining the availability of sources.
    [3" id="c-fr-0003]
    3. Device according to claim 1 characterized in that the first and second conversion means (61, 62) comprise galvanic isolation respectively between the first source of electrical energy (1) and the supply bus (63), and between the second source of electrical energy (2) and the supply bus (63).
    [4" id="c-fr-0004]
    4. Device according to one of the preceding claims, characterized in that the first voltage converter (61) converts the first voltage (Us1) from the first energy source into an intermediate voltage (Ui) when the first voltage (Us1) is greater than a first threshold (Us1_mini) and that the second voltage converter (62) converts the second voltage (Us2) of the second energy source into said intermediate voltage (Ui) when the second voltage (Us2) is greater than a second threshold (Us2_mini).
    [5" id="c-fr-0005]
    5. Device according to one of the preceding claims, characterized in that the intermediate voltage (Ui) is a direct voltage.
    [6" id="c-fr-0006]
    6. Device according to one of the preceding claims, characterized in that the operating voltage (Uc) is substantially equal to the nominal operating voltage of the control-command circuits.
    [7" id="c-fr-0007]
    7. Device according to one of the preceding claims characterized in that an emergency supply device (68) is connected to the supply bus to deliver the intermediate voltage (Ui) to said supply bus when the first and the second energy source (1,2) are unavailable.
    [8" id="c-fr-0008]
    8. Device according to claim 7 characterized in that the emergency power supply device (68) comprises an energy storage means arranged to be charged under a storage voltage (Ust) when the first and / or the second source energy (1,2) is available.
    [9" id="c-fr-0009]
    9. Device according to one of the preceding claims, characterized in that the intermediate voltage (Ui) is substantially equal to the storage voltage (Ust) of the energy storage means of the emergency device (68).
    [10" id="c-fr-0010]
    10. Device according to one of the preceding claims, characterized in that the control circuit (32) is connected to the supply bus (63) for its supply.
    [11" id="c-fr-0011]
    11. Source inverter intended to connect respectively a first or a second source of electrical energy (1, 2) to an electrical load (8) depending on the availability of said sources, said source inverter comprising:
    - at least a first and a second switch (4, 5),
    - at least two control auxiliaries (43, 53), each auxiliary being intended to respectively control a switch (4, 5), and
    - one or more state sensors (42, 52), each state sensor cooperating respectively with a switch (4, 5) to detect the state of said switch, characterized in that it comprises a control-command device according to one of claims 1 to 10.
    [12" id="c-fr-0012]
    12. Source inverter according to claim 11, characterized in that the input of the first conversion means (61) is connected between the first source (1) and the first switch (4), and that the input of the second means conversion (62) is connected between the second source (2) and the second switch (5).
    [13" id="c-fr-0013]
    13. Method for supplying a device intended for the control-command of a source inverter according to one of claims 11 or 12 characterized in that it comprises the following steps:
    - converting the first voltage (Us1) from the first energy source (1) into an intermediate voltage (Ui) to supply the power bus (63) by means of a first voltage converter (61),
    - converting the second voltage (Us2) of the second energy source (2) into an intermediate voltage (Ui) to supply the power bus (63) by means of a second voltage converter (62),
    - the conversion of the voltage (Ui) of the supply bus into a working voltage (Uc) by means of a third voltage converter.
    [14" id="c-fr-0014]
    14. A method for supplying a device intended for the control-command of a source inverter according to claim 13 characterized in that it comprises the following steps in the event of the presence of an emergency supply device
    5 (68):
    - the supply by the emergency supply device (68) of the intermediate voltage (Ui) to the supply bus (63) when the two conversion means (61, 62) of the first voltage (Us1) or of the second voltage (Us2) does not work, otherwise,
    10 - recharging the storage means of the emergency power supply device (68) when the intermediate voltage (Ui) is supplied by at least one of the conversion means (61,62) of the first voltage (Us1) or of the second voltage (Us2).
    1/4
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    同族专利:
    公开号 | 公开日
    EP3276769A1|2018-01-31|
    CN107666176A|2018-02-06|
    BR102017014317A2|2018-03-20|
    AU2017208281A1|2018-02-15|
    FR3054737B1|2020-01-17|
    US20180034316A1|2018-02-01|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US7259481B2|2003-02-28|2007-08-21|Kohler Co.|Automatic transfer switch capable of receiving input power having voltage within a wide range|
    EP2260560A2|2008-04-09|2010-12-15|Thales|Method for managing electrical network|
    EP2999084A1|2014-09-18|2016-03-23|Schneider Electric Industries SAS|Electrical interconnection device for source inverter, and source inverter comprising such a device|
    FR3081608B1|2018-05-28|2021-01-22|Amc|CURRENT SOURCE INVERTER FOR NUCLEAR POWER PLANT|
    IT201900015959A1|2019-09-10|2021-03-10|Fpt Ind Spa|ELECTRIC POWER SUPPLY ASSEMBLY|
    US11221658B2|2020-01-16|2022-01-11|Alpha And Omega Semiconductor , Ltd.|Multi-port power delivery system and related control method|
    法律状态:
    2017-07-06| PLFP| Fee payment|Year of fee payment: 2 |
    2018-02-02| PLSC| Publication of the preliminary search report|Effective date: 20180202 |
    2018-07-05| PLFP| Fee payment|Year of fee payment: 3 |
    2019-07-26| PLFP| Fee payment|Year of fee payment: 4 |
    2020-07-28| PLFP| Fee payment|Year of fee payment: 5 |
    2021-07-26| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1657195|2016-07-27|
    FR1657195A|FR3054737B1|2016-07-27|2016-07-27|DEVICE FOR CONTROLLING A SOURCE INVERTER|FR1657195A| FR3054737B1|2016-07-27|2016-07-27|DEVICE FOR CONTROLLING A SOURCE INVERTER|
    EP17176865.8A| EP3276769A1|2016-07-27|2017-06-20|Device for monitoring/controlling a source changeover switch|
    BR102017014317-1A| BR102017014317A2|2016-07-27|2017-06-30|DEVICE FOR MONITORING / CONTROLING A SOURCE INVERTER SWITCH|
    CN201710594771.1A| CN107666176A|2016-07-27|2017-07-20|Equipment for monitoring/controlling power change-over switch|
    US15/660,222| US20180034316A1|2016-07-27|2017-07-26|Device for commanding/controlling a source changeover switch|
    AU2017208281A| AU2017208281A1|2016-07-27|2017-07-26|Device for commanding/controlling a source changeover switch|
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