CN113890397A - Auxiliary grid-connected device of inverter power supply under low-voltage power supply network - Google Patents
Auxiliary grid-connected device of inverter power supply under low-voltage power supply network Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/493—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode the static converters being arranged for operation in parallel
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Abstract
The invention relates to an auxiliary inverse power supply grid-connected device in a low-voltage power supply network, which adopts a configuration mode of one master and multiple slaves to configure control stations, wherein each control station acquires a breaker state signal, a manual switching-on/off operation input instruction and inverse power supply state feedback information of a switch in a corresponding power supply area, and outputs the breaker switching-on/off output instruction and the inverse power supply working state control output instruction in the corresponding power supply area; all control stations communicate with each other through a master-slave communication bus; only the redundant master PLC the master control station has. The device achieves the grid-connected auxiliary control function of the inverter power supply in a complex power supply network, automatically achieves the acquisition of the state of the power supply network after acquiring an input manual switching-on and switching-off operation input instruction, identifies a main network of the inverter power supply to be connected in parallel, transmits the three-phase electric phase information of the main network to the inverter power supply to be connected in a grid, and timely informs the inverter power supply of switching the working state after identifying that the inverter power supply is connected in parallel with a diesel generator, and can achieve automatic grid connection without human intervention.
Description
Technical Field
The invention relates to a power grid control technology, in particular to an auxiliary grid connection device of an inverter power supply in a low-voltage power supply network.
Background
With the development of new energy technology, independent power systems in remote mountainous areas, islands and the like increasingly adopt a new energy power generation device and diesel generator hybrid power supply mode. For such systems, there is a functional requirement for the inverter power supply to supply power separately and in parallel with the diesel generator. The inverter is in different working states, adopts voltage source control when independently supplying power, and adopts current source control as the basis when being connected in parallel with the diesel generator for supplying power, and the inverter needs to acquire a main network phase as a synchronization source when being connected in parallel with the inverter or the diesel generator, and adjusts the self power phase to be synchronous with the main network phase so as to carry out grid-connected operation.
For a simple power supply network, if only one inverter power supply and one diesel generator are arranged in the system, the grid-connected operation of the inverter power supply and the diesel generator can be realized only by transmitting the three-phase voltage at the outlet end of the diesel generator to the inverter power supply, but the power supply network of an independent power system is usually complex, and a plurality of inverter power supplies and a plurality of diesel generators form a plurality of annular networks. The grid-connected working condition of one inverter power supply and a plurality of main networks exists, the grid-connected point of one inverter power supply and a specific main network also has a plurality of conditions, after grid connection, whether the inverter power supply is in parallel operation with a diesel generator or not needs to be known, and then the inverter power supply is timely informed of switching the working state.
For a complex power supply system, a system network can be usually partitioned according to power generation and load physical areas, wires, copper bars and circuit breakers are adopted in the areas for switching a power supply, cables and circuit breakers are adopted between the areas for networking operation between the areas, a complex power grid structure forms a plurality of grid-connected working conditions of an inverter power supply, how to acquire the state of the power supply network is to identify a main grid of the inverter power supply to be connected in parallel, the three-phase information of the main grid is transmitted to the inverter power supply to be connected in parallel, and after the inverter power supply and a diesel generator are identified to be connected in parallel, the inverter power supply is informed of switching working states in time, namely the complexity of the power supply network is increased, and the inverter power supply is connected in a grid manner.
Disclosure of Invention
Aiming at the grid connection problem of a complex power supply network containing an inverter power supply, the auxiliary grid connection device of the inverter power supply under the low-voltage power supply network is provided.
The technical scheme of the invention is as follows: a control station is configured in a master-slave configuration mode, each control station acquires a breaker state signal, a manual switching-on/off operation input instruction and inverter power state feedback information of a corresponding power supply area switch through a digital quantity input signal cable, and outputs a breaker switching-on/off output instruction and an inverter power working state control output instruction of the corresponding power supply area through a digital quantity output signal cable; all control stations communicate with each other through a master-slave communication bus; the slave control station does not contain a redundant master control PLC only provided by the master control station, and the rest configurations are consistent with the master control station.
Preferably, the control station comprises a box body, a power supply module, a digital quantity input module, a digital quantity output module, a coupling module, a tail end module, a module back plate and a mounting plate except only a redundant master control PLC of the master control station; the redundant main control PLC and all modules are fixedly arranged on a mounting plate in the box body; a 24V direct current power supply is connected into a power supply module, and the output of the power supply module is connected with all modules in the box body through a circuit on a module backboard to supply power to the redundancy master control PLC; the circuit on the module back plate is connected with the digital quantity input module, the digital quantity output module, the coupling module and the tail end module to realize information interaction among the modules, transmits the digital input to the coupling module and the tail end module to the redundancy main control PLC, and transmits a control instruction sent by the redundancy main control PLC to the digital quantity output module.
Preferably, the redundancy master control PLC consists of two PLCs, redundancy switching is realized, and the two PLCs carry out data synchronization through optical fibers; the redundant master control PLC's in the main control station 2 PLC and each control station in the coupling module, the tail end module forms 2 independent ring networks and is used for distributed IO control, wherein the coupling module possesses 2 network input interface and selects 2 network output interface on connecting 2 PLC or 2 network output interface on the tail end module, the tail end module possesses 2 network output interface and selects 2 network input interface on connecting 2 PLC or 2 network input interface on the coupling module, wherein realize the partly of ring network through the module backplate between the coupling module in each control station and the tail end module, redundant master control PLC between each control station, coupling module and tail end module realize the surplus part of ring network through principal and subordinate communication bus.
Preferably, the control station further comprises a line selection relay board, and the relay board comprises three groups of relays, an input wiring terminal, an output wiring terminal and a relay board PCB body; the power supply source of each power supply area comprises all inverter power supplies or diesel generator sets, the signal input relays in the first group are used for selecting and sending three-phase voltage of the power supply to the control station as reference voltage, and the set number is equal to the number of the power supply; the second group of signal transfer relays are used for trans-regional transmission of three-phase voltage, and the set number of the transfer relays is matched with the number of adjacent power supply regions of the power supply region where the control station is located; and the third group of signal output relays realize the transmission of three-phase voltage to the inverter power supplies needing to be subjected to step-by-step, the set number is matched with the number of the inverter power supplies in the controlled power supply area, and the line selection relay board control instruction directly controls the three groups of relays to act so as to realize the accurate distribution and transmission of the three-phase voltage in the power supply area.
Preferably, the line selection relay board receives the three-phase voltage of the control station through a three-phase voltage input cable, and simultaneously receives a line selection relay board control instruction given by a digital output module of the control station, the control instruction correspondingly controls the actuation and the disconnection of a relay on the line selection relay board, the line selection relay board sends the three-phase voltage to a specified inverter power supply or other power supply areas through a three-phase voltage output cable to perform signal transmission on the next step, and the internal circuit logic of the line selection relay board is realized in the relay board PCB board body.
The invention has the beneficial effects that: the auxiliary grid-connected device for the inverter power supply under the low-voltage power supply network can realize the auxiliary grid-connected control function of the inverter power supply in a complex power supply network, can automatically acquire the state of the power supply network after acquiring an input manual switching-on and switching-off operation input instruction, identifies the main grid to be connected in parallel of the inverter power supply, transmits the three-phase electric phase information of the main grid to the inverter power supply to be connected in parallel, and timely informs the inverter power supply of switching the working state after identifying that the inverter power supply is connected in parallel with a diesel generator, so that the auxiliary inverter power supply can realize automatic grid-connection without human intervention. And the device is designed through distributed IO design, redundant PLC and double-ring network, so that the reliability and the vitality of the device are improved.
Drawings
Fig. 1 is a diagram of equipment configuration and external interfaces of an auxiliary grid-connected device of an inverter power supply in a low-voltage power supply network;
FIG. 2 is a diagram showing the layout of the internal devices of the main control station according to the present invention;
FIG. 3 is a layout diagram of the components of the line selection relay board according to the present invention;
FIG. 4 is an electrical schematic diagram of the line selection relay board of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 1, the device configuration and external interface diagram of the inverter power auxiliary grid-connected device in the low-voltage power supply network includes a plurality of control stations, and adopts a configuration form of one master and a plurality of slaves. In fig. 1, a dotted line frame indicates a physical power supply area, wherein DC/AC indicates an inverter power supply, DG indicates a diesel generator set, Q indicates a circuit breaker, a solid line indicates a bus, and the same dotted line frame indicates that equipment such as the inverter power supply, the diesel generator set, the circuit breaker, and the bus are in the same physical area. Usually, the distance of a power supply physical area is far, control stations are arranged on the spot in the area to acquire and control switching values, and information is transmitted among the control stations in a data communication mode so as to avoid laying a large number of remote control lines. The number of the specific control stations is related to the number of physical areas of a complex power supply network, and taking 3 power supply physical areas as an example, the inverter grid-connected auxiliary device under the complex power supply network comprises a main control station 1, a first slave control station 2, a second slave control station 3, a master-slave communication bus 4, an electric signal aviation plug 5, a control station power supply cable 6, a digital quantity input signal cable 7, a digital quantity output signal cable 8, a three-phase voltage input cable 9 and a three-phase voltage output cable 10. The direct current 24V power supply introduced by the power supply cable 6 is used for providing working power supply for each control station, the digital input signal cable 7 mainly comprises the following three information, namely a power supply area switch breaker state signal, a manual switching-on and switching-off operation input instruction and inverter power supply state feedback information, the digital output signal cable 8 also comprises a breaker switching-on and switching-off output instruction and an inverter power supply working state control output instruction, and the line selection relay board control instruction is not output outwards.
As shown in the configuration and layout diagram of the internal devices of the master control station in fig. 2, the master control station 1 includes a box 011, a power module 012, a redundant master PLC013, a digital input module 015, a digital output module 016, a coupling module 017, a tail end module 018, an output extension relay 019, a route selection relay board 020, a box door 021, a screw 022, a module back board 023, a mounting board 024, and a wire groove 014. The slave control station 2 and the slave control station 3 do not comprise redundant master control PLC013, the rest configurations are consistent with those of the master control station 1, the box body 011 is made of metal materials and is assembled with the box door 021 through a plurality of screws 022, and the IP protection level, the impact resistance and the anti-electromagnetic interference capability of the device are improved. The components and parts in the box body 011 are mechanically connected and fixed on the mounting plate 024 through guide rails or screws, so that the whole box body is convenient to disassemble and maintain, and the box body has good shock and vibration resistance.
24V DC power supply inserts power module 012 accessible circuit connection on module backplate 023 is redundancy master control PLC013, digital quantity input module 015, digital quantity output module 016, coupling module 017, the power supply of tail end module 018 while module backplate 023 can also realize digital quantity input module 015, digital quantity output module 016, coupling module 017, communication between the tail end module 018 module, transmit digital input to coupling module 017, tail end module 018 sends to redundancy master control PLC013, and issue control command to digital quantity output module 016. Redundancy master control PLC013 comprises two PLC, can realize redundancy switch, and under the circumstances of one of them PLC trouble, another PLC can take over control, and the device can continue to operate still, and two PLC carry out data synchronization through optic fibre. 2 PLC of redundant master control PLC013 in the master control station, a coupling module 017 and a tail end module 018 in each station can form 2 independent ring networks for distributed IO control, wherein the coupling module 017 is provided with 2 network input interfaces which can be connected with network output interfaces on the 2 PLC or 2 network output interfaces on one tail end module 018, the tail end module 018 is provided with 2 network output interfaces which can be connected with network input interfaces on the 2 PLC or 2 network input interfaces on one coupling module 017, wherein a part of the ring network is realized between the coupling module 017 and the tail end module 018 in each station through a module backboard 023, the rest of the ring network is realized by the inter-station redundant master control PLC013, the coupling module 017 and the tail end module 018 through a master-slave communication bus 4, the ring network plays a role of transmitting input and output signals, namely transmitting the input of digital quantity input module 015 of each station to the redundant master control PLC013, and a logic control output instruction generated by the redundant master control PLC013 is transmitted to the digital quantity output module 016, and a master-slave communication bus 4 physical link adopts an optical fiber.
As shown in fig. 3 and 4, the line selection relay board 020 is composed of three sets of relays, namely a signal input relay 0201, a signal transfer relay 0202, a signal output relay 0203, an input connection terminal 0204, an output connection terminal 0205 and a relay board PCB board body 0206. Because the parallel connection point of the inverter power supply and the main network can be in the power supply area where the inverter power supply is located and can also be in other power supply areas, three-phase voltage of other areas needs to be transmitted to the inverter power supply, for each power supply area, the three-phase voltage source comprises all inverter power supplies or diesel generator sets, if the inverter power supplies or the diesel generator sets are called as power supply sources, the signal input relays 0201 in the first group are used for selecting the three-phase voltage of the power supply as reference voltage to be transmitted to the control station, and the number of the signal input relays 0201 is equal to the number of the power supply sources. The second group of signal transfer relays 0202 are mainly used for trans-regional transmission of three-phase voltage to adjacent power supply regions, and the number of the transfer relays 0202 is matched with the number of the adjacent power supply regions of the power supply region where the control station is located; and the third group of signal output relays 0203 realize that three-phase voltage is transmitted to the inverter power supply needing to be subjected to step-by-step, and the number of the output relays 0203 is matched with the number of the inverter power supplies in the controlled power supply area.
The main power three-phase voltage is introduced into a line selection relay board 020 through a three-phase voltage input cable 9 through an input wiring terminal 0204, and meanwhile, a line selection relay board 020 control instruction given by a digital output module 016 is accessed, the control instruction can control the actuation and the disconnection of the relay, and the three-phase voltage is sent to a specified inverter power supply or other power supply areas through an output wiring terminal 0205 through a three-phase voltage output cable 10 to carry out next-step signal transmission. The logic of the internal circuit of the line selection relay board 020 is realized in the relay board PCB body.
The inverter power auxiliary grid-connected device applicable to the complex power supply network has the following specific operation process:
the state of each power supply area switch breaker, manual switching on and off operation input instructions, inverter power supply state feedback information is input as digital quantity through an electric signal aviation plug (all lines are externally connected through aerial plugs) access device of each station and is transmitted to a digital quantity input module of each station through a conventional wire laid in a wire groove, the signals of the power supply area are collected from the digital quantity input modules in the control station 2 and the control station 3 and are transmitted to a PLC (programmable logic controller) in a current working state in a redundancy master control PLC013 through a ring network formed by a coupling module in the station and a tail end module, the redundancy master control PLC013 can analyze the current whole power supply network structure through the state of each power supply area switch breaker, and after receiving the manual switching on and off operation input instructions, the device automatically analyzes and performs three-phase voltage line selection operation, namely the main three-phase voltage is accurately transmitted to an inverter power supply to be combined (for example, a DG2 and a DC/AC1 in the graph 1 are realized through Q12 and are combined In connection with the parallel connection (Q4, Q3, Q1, Q16, Q18 and Q11 are switched on, and finally Q12 is switched on to realize the parallel connection), the DC/AC1 inverter power supply needs to obtain the three-phase voltage at the other side of the QF12 breaker switch, namely the voltage at the three-phase voltage and the outlet voltage of a DG2 generator, and the three-phase voltage is used for voltage step adjustment of the inverter power supply, and the voltage step adjustment is a necessary premise for the parallel connection of the inverter power supplies. At the moment, the PLC controls each group of relays in the line selection relay boards in each control station to switch on and off, and transmits the DG2 outlet voltage to the DG/AC1 inverter power supply, when the inverter power supply state feedback information indicates that the inverter power supply is completed in a whole step, the device outputs a circuit breaker switching-on instruction (as in the above example, the Q12 circuit breaker is switched on at the moment), and after the circuit breaker is successfully switched on, the device identifies the whole power supply network structure again and sends an inverter power supply working state control output instruction to the specified inverter power supply. The circuit breaker switching-on/off output instruction, the inverter power supply working state control output instruction and the line selection relay board control instruction are issued to each station digital quantity output module through an annular network formed by each station internal coupling module and the tail end module, the circuit breaker switching-on/off output instruction and the inverter power supply working state control output instruction are output to a specified inverter power supply or a circuit breaker through an electric signal aviation plug and a digital quantity output signal cable 8 after being expanded through an output expansion relay, and the line selection relay board control instruction is directly introduced into the line selection relay board in the station through a wiring terminal to control three groups of relays to act, so that accurate transmission of three-phase voltage is realized.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (5)
1. The auxiliary inverse power supply grid-connection device under the low-voltage power supply network is characterized in that control stations are configured in a master-slave configuration mode, each control station acquires a breaker state signal, a manual switching-on/off operation input instruction and inverse power supply state feedback information of a corresponding power supply area switch through a digital quantity input signal cable, and outputs a breaker switching-on/off output instruction and an inverse power supply working state control output instruction of the corresponding power supply area through a digital quantity output signal cable; all control stations communicate with each other through a master-slave communication bus; the slave control station does not contain a redundant master control PLC only provided by the master control station, and the rest configurations are consistent with the master control station.
2. The inverse power supply auxiliary grid-connected device under the low-voltage power supply network according to claim 1, wherein the control station comprises a box body, a power supply module, a digital quantity input module, a digital quantity output module, a coupling module, a tail end module, a module back plate and a mounting plate except for a redundant main control PLC only provided by the main control station; the redundant main control PLC and all modules are fixedly arranged on a mounting plate in the box body; a 24V direct current power supply is connected into a power supply module, and the output of the power supply module is connected with all modules in the box body through a circuit on a module backboard to supply power to the redundancy master control PLC; the circuit on the module back plate is connected with the digital quantity input module, the digital quantity output module, the coupling module and the tail end module to realize information interaction among the modules, transmits the digital input to the coupling module and the tail end module to the redundancy main control PLC, and transmits a control instruction sent by the redundancy main control PLC to the digital quantity output module.
3. The auxiliary inverse power grid connection device for the low-voltage power supply network according to claim 2, wherein the redundant master control PLC is composed of two PLCs, redundant switching is realized, and the two PLCs perform data synchronization through optical fibers; the redundant master control PLC's in the main control station 2 PLC and each control station in the coupling module, the tail end module forms 2 independent ring networks and is used for distributed IO control, wherein the coupling module possesses 2 network input interface and selects 2 network output interface on connecting 2 PLC or 2 network output interface on the tail end module, the tail end module possesses 2 network output interface and selects 2 network input interface on connecting 2 PLC or 2 network input interface on the coupling module, wherein realize the partly of ring network through the module backplate between the coupling module in each control station and the tail end module, redundant master control PLC between each control station, coupling module and tail end module realize the surplus part of ring network through principal and subordinate communication bus.
4. The auxiliary grid-connected device of the inverse power supply in the low-voltage power supply network according to claim 3, wherein the control station further comprises a line selection relay board, and the relay board comprises three groups of relays, input connecting terminals, output connecting terminals and a relay board PCB board body; the power supply source of each power supply area comprises all inverter power supplies or diesel generator sets, the signal input relays in the first group are used for selecting and sending three-phase voltage of the power supply to the control station as reference voltage, and the set number is equal to the number of the power supply; the second group of signal transfer relays are used for trans-regional transmission of three-phase voltage, and the set number of the transfer relays is matched with the number of adjacent power supply regions of the power supply region where the control station is located; and the third group of signal output relays realize the transmission of three-phase voltage to the inverter power supplies needing to be subjected to step-by-step, the set number is matched with the number of the inverter power supplies in the controlled power supply area, and the line selection relay board control instruction directly controls the three groups of relays to act so as to realize the accurate distribution and transmission of the three-phase voltage in the power supply area.
5. The auxiliary grid-connected device for the inverter power supply in the low-voltage power supply network according to claim 4, wherein the line selection relay board receives a three-phase voltage of the control station through a three-phase voltage input cable, and simultaneously receives a line selection relay board control command given by a digital output module of the control station, the control command correspondingly controls the on-off of a relay on the line selection relay board, the line selection relay board sends the three-phase voltage to a specified inverter power supply or other power supply areas through a three-phase voltage output cable to perform next signal transmission, and the internal circuit logic of the line selection relay board is realized in a relay board PCB body.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010103442A (en) * | 2000-05-10 | 2001-11-23 | 이종훈 | Automatic Power Restoration System |
| US20100236612A1 (en) * | 2009-02-20 | 2010-09-23 | Sayed Ali Khajehoddin | Inverter for a Distributed Power Generator |
| CN202602162U (en) * | 2012-05-23 | 2012-12-12 | 长江三峡能事达电气股份有限公司 | Wind power converter based on PLC (programmable logic controller) control architecture |
| WO2015180529A1 (en) * | 2014-05-27 | 2015-12-03 | 国家电网公司 | Microgrid adaptive overcurrent protection method |
| CN208174274U (en) * | 2018-05-31 | 2018-11-30 | 北京天诚同创电气有限公司 | Micro-grid system |
| CN211296207U (en) * | 2019-12-31 | 2020-08-18 | 郑州众智科技股份有限公司 | Control device for parallel connection of generator set and inverter |
-
2021
- 2021-11-05 CN CN202111305823.1A patent/CN113890397B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010103442A (en) * | 2000-05-10 | 2001-11-23 | 이종훈 | Automatic Power Restoration System |
| US20100236612A1 (en) * | 2009-02-20 | 2010-09-23 | Sayed Ali Khajehoddin | Inverter for a Distributed Power Generator |
| CN202602162U (en) * | 2012-05-23 | 2012-12-12 | 长江三峡能事达电气股份有限公司 | Wind power converter based on PLC (programmable logic controller) control architecture |
| WO2015180529A1 (en) * | 2014-05-27 | 2015-12-03 | 国家电网公司 | Microgrid adaptive overcurrent protection method |
| CN208174274U (en) * | 2018-05-31 | 2018-11-30 | 北京天诚同创电气有限公司 | Micro-grid system |
| CN211296207U (en) * | 2019-12-31 | 2020-08-18 | 郑州众智科技股份有限公司 | Control device for parallel connection of generator set and inverter |
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