CN210273512U - Micro-grid control system - Google Patents
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- CN210273512U CN210273512U CN201921553274.8U CN201921553274U CN210273512U CN 210273512 U CN210273512 U CN 210273512U CN 201921553274 U CN201921553274 U CN 201921553274U CN 210273512 U CN210273512 U CN 210273512U
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Abstract
The utility model discloses a microgrid control system for improve the power supply reliability of electric wire netting. The utility model discloses microgrid control system is applied to the medium voltage distribution network, and the medium voltage distribution network includes major network, medium voltage switch and load electric wire netting. The microgrid control system comprises a bus, a photovoltaic power generation system, an energy storage system, power consumption in a box, a power grid circuit breaker and a microgrid controller. The photovoltaic power generation system is electrically connected with the bus, the energy storage system is electrically connected with the bus, and the box is electrically connected with the bus. One end of the power grid circuit breaker is electrically connected with the bus, and the other end of the power grid circuit breaker is electrically connected with the output end of the micro-grid control system. And the output end of the microgrid control system is electrically connected between the medium-voltage switch and the load power grid. And the microgrid controller is respectively in communication connection with the medium-voltage switch, the photovoltaic power generation system, the energy storage system and the power grid circuit breaker. Therefore, when power supply abnormality occurs in the medium-voltage power distribution network, power supply is provided through the micro-grid control system, and power supply reliability of the power grid can be improved.
Description
Technical Field
The utility model relates to a power grid technical field especially relates to a microgrid control system.
Background
The power grid is used for supplying power to users, and has great influence on the development of the livelihood, the industry and the like.
When a circuit of an existing power grid breaks down, large-area power failure is often caused, and therefore life and production of users are affected. For example, some distribution lines adopt a single-radiation type wiring mode, and when a line fails, the single-radiation type line may cause large-scale power failure, so that the power supply reliability is low.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a microgrid control system for improve the power supply reliability of electric wire netting.
To achieve the purpose, the utility model adopts the following technical proposal:
a microgrid control system is applied to a medium-voltage distribution network, wherein the medium-voltage distribution network comprises a main network, a medium-voltage switch and a load power grid;
the microgrid control system comprises: the system comprises a bus, a photovoltaic power generation system, an energy storage system, power utilization in a box, a power grid circuit breaker and a microgrid controller;
the photovoltaic power generation system is electrically connected with the bus, the energy storage system is electrically connected with the bus, and electricity used in the box is electrically connected with the bus;
one end of the power grid circuit breaker is electrically connected with the bus, and the other end of the power grid circuit breaker is electrically connected with the output end of the micro-grid control system;
the output end of the microgrid control system is electrically connected between the medium-voltage switch and the load power grid;
the microgrid controller is respectively in communication connection with the medium-voltage switch, the photovoltaic power generation system, the energy storage system and the power grid circuit breaker.
Optionally, the photovoltaic power generation system comprises a photovoltaic breaker, a photovoltaic inverter, and a photovoltaic panel;
one end of the photovoltaic inverter is electrically connected with the photovoltaic circuit breaker, and the other end of the photovoltaic inverter is electrically connected with the photovoltaic plate;
the photovoltaic circuit breaker is electrically connected with the bus.
Optionally, the energy storage system comprises a PCS circuit breaker, an energy storage converter, and a battery system;
one end of the energy storage converter is electrically connected with the PCS circuit breaker, and the other end of the energy storage converter is electrically connected with the battery system;
the PCS breaker is electrically connected with the bus.
Optionally, the battery system comprises a BMS;
the battery system is used for charging and discharging.
Optionally, an output end of the microgrid control system is electrically connected with a box transformer substation, and the box transformer substation is electrically connected between the medium voltage switch and the load power grid.
Optionally, the main network is a 10kV main network, and the bus is a 0.4kV bus.
Optionally, the energy storage system, the grid breakers and the microgrid controller are mounted within a container.
Optionally, the microgrid controller is communicatively connected to the medium voltage switch, the photovoltaic power generation system, the energy storage system, and the grid circuit breaker, respectively, using a standard Modbus communication protocol.
Optionally, the load grid comprises a power transformer, and a load;
one end of the power transformer is electrically connected with the load, and the other end of the power transformer is electrically connected with the medium-voltage switch.
Optionally, the microgrid controller is configured to control opening or closing of the medium voltage switch according to whether the medium voltage distribution network is abnormal.
The utility model has the advantages that:
the utility model discloses microgrid control system is applied to the medium voltage distribution network, and the medium voltage distribution network includes major network, medium voltage switch and load electric wire netting. The microgrid control system comprises a bus, a photovoltaic power generation system, an energy storage system, power consumption in a box, a power grid circuit breaker and a microgrid controller. The photovoltaic power generation system is electrically connected with the bus, the energy storage system is electrically connected with the bus, and the box is electrically connected with the bus. One end of the power grid circuit breaker is electrically connected with the bus, and the other end of the power grid circuit breaker is electrically connected with the output end of the micro-grid control system. And the output end of the microgrid control system is electrically connected between the medium-voltage switch and the load power grid. And the microgrid controller is respectively in communication connection with the medium-voltage switch, the photovoltaic power generation system, the energy storage system and the power grid circuit breaker. Therefore, when power supply abnormality occurs in the medium-voltage power distribution network, power supply is provided through the micro-grid control system, and power supply reliability of the power grid can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a microgrid control system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a microgrid control system according to another embodiment of the present invention;
fig. 3 is a flowchart of a microgrid control system according to another embodiment of the present invention.
In the figure:
1. a main network; 2. a medium voltage switch; 3. a box transformer substation; 4. a bus bar; 5. a grid circuit breaker; 6. a photovoltaic circuit breaker; 7. a PCS breaker; 8. a microgrid controller; 9. a photovoltaic inverter; 10. an energy storage converter; 11. a photovoltaic panel; 12. a battery system; 13. electricity is used in the box; 14. a container; 15. a power transformer; 16. a load; 17. a load grid; 18. a photovoltaic power generation system; 19. an energy storage system.
Detailed Description
The embodiment of the utility model provides a microgrid control system for improve the power supply reliability of electric wire netting.
In order to make the objects, features and advantages of the present invention more obvious and understandable, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the embodiments described below are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In order to clearly describe the microgrid control system provided by the embodiments of the present invention, some terms related to the embodiments of the present invention are described in detail below.
The micro-grid is an autonomous system capable of realizing self-control, protection and management, and can be operated with an external power grid or operated in an isolated manner. The system is used as a complete power system, and functions of power balance control, system operation optimization, fault detection and protection, power quality management and the like are realized by means of self control and energy supply management. The micro-grid can provide an effective standby support power supply for the mains supply, and under the condition of mains supply power failure, the isolated island operation of the micro-grid is realized, so that the power failure time of a user can be reduced, and the power supply reliability is improved.
The micro-grid combines the energy storage technology and the distributed power generation, can solve the problem of output fluctuation of the distributed power generation, improves the effective running time and efficiency of the distributed power supply, and realizes high reliable supply of various energy forms to the load 16, thereby creating higher economic and environmental values.
The utility model discloses microgrid control system uses promptly in little electric wire netting, through the control to little electric wire netting and distribution network, can improve the power supply reliability of electric wire netting.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a microgrid control system according to an embodiment of the present invention.
The utility model discloses microgrid control system is applied to the medium voltage distribution network, and the medium voltage distribution network includes major network 1, medium voltage switch 2 and load electric wire netting 17.
Wherein, as shown in fig. 2, optionally the load grid 17 comprises a power transformer 15 and a load 16. One end of the power transformer 15 is electrically connected to the load 16, and the other end of the power transformer 15 is electrically connected to the medium voltage switch 2.
The output end of the microgrid control system is electrically connected between the medium-voltage switch 2 and the load power grid 17. In the embodiment of the utility model provides an in, major network 1 and microgrid control system can be used to supply power to load electric wire netting 17.
The utility model discloses microgrid control system includes bus 4, photovoltaic power generation system 18, energy storage system 19, incasement power consumption 13, electric wire netting circuit breaker 5 and microgrid controller 8.
The photovoltaic power generation system 18 and the energy storage system 19 are power supply sources of the microgrid control system. The photovoltaic power generation system 18 is electrically connected with the bus 4, the energy storage system 19 is electrically connected with the bus 4, and the box is electrically connected with the bus 4 by the electricity 13.
One end of the power grid circuit breaker 5 is electrically connected with the bus 4, and the other end of the power grid circuit breaker 5 is electrically connected with the output end of the micro-grid control system. The grid breaker 5 may thus be used to control the supply of power out of the microgrid control system.
The microgrid controller 8 is in communication with the medium voltage switch 2, the photovoltaic power generation system 18, the energy storage system 19 and the grid breaker 5, respectively. In this way, the microgrid controller 8 may monitor and control the medium voltage switch 2, the photovoltaic power generation system 18, the energy storage system 19, and the grid circuit breaker 5.
Specifically, the microgrid controller 8 is in communication connection with the medium voltage switch 2, the photovoltaic power generation system 18, the energy storage system 19, and the grid circuit breaker 5, respectively, using a standard Modbus communication protocol (Modbus protocol).
In order to make the power supplied by the medium voltage distribution network and the microgrid control system different, so that the microgrid control system has more flexibility in setting, optionally, the output end of the microgrid control system is electrically connected with the box transformer 3, and the box transformer 3 is electrically connected between the medium voltage switch 2 and the load power grid 17. In this way, under the control of the box transformer 3, the box transformer 3 can convert the output voltage of the microgrid control system into the same voltage as the voltage supplied by the medium voltage distribution network. At this time, the output voltage of the microgrid control system may be different from the voltage supplied by the medium voltage distribution grid.
For example, in the embodiment of the present invention, the main network 1 is a 10kV main network, and the bus 4 is a 0.4kV bus. Therefore, under the action of the box transformer substation 3, 0.4kV voltage output by the microgrid control system can be converted into 10kV voltage. In some remote mountainous areas, the 10kV distribution line adopts a single radiation type wiring mode with a high proportion, and when the line of the single radiation type line fails, large-scale power failure can be caused, so that the power supply reliability is low. At such mountain area middling pressure distribution network, use the utility model discloses behind the microgrid control system, can build out the energy-conserving smart power grids of low carbon when improving the power supply reliability.
The utility model discloses microgrid control system has multiple implementation, and the following will carry out detailed explanation to each device of microgrid control system.
Optionally, the photovoltaic power generation system 18 includes a photovoltaic breaker 6, a photovoltaic inverter 9, and a photovoltaic panel 11.
One end of the photovoltaic inverter 9 is electrically connected to the photovoltaic breaker 6, and the other end of the photovoltaic inverter 9 is electrically connected to the photovoltaic panel 11. The photovoltaic breaker 6 is electrically connected to the bus bar 4. In other words, the photovoltaic panel 11, the photovoltaic inverter 9, and the photovoltaic breaker 6 are electrically connected in sequence. The photovoltaic power generation system 18 may provide electrical power to the bus bar 4.
Optionally, the energy storage System 19 includes a Power Conversion System (PCS) breaker 7, an energy storage converter 10, and a battery System 12. One end of the energy storage converter 10 is electrically connected with the PCS breaker 7, and the other end of the energy storage converter 10 is electrically connected with the battery system 12. The PCS breaker 7 is electrically connected to the bus bar 4. In other words, the battery system 12, the energy storage converter 10 and the PCS circuit breaker 7 are electrically connected in sequence. The energy storage system 19 may provide electrical energy to the bus bar 4.
The Battery System 12 may include a Battery Management System (BMS). The battery system 12 is used for charging and discharging.
The utility model discloses battery system 12 can provide the electric energy to generating line 4 to can be to the electric wire netting power supply, this battery system 12 also can charge the operation, in order to carry out the energy storage. For example, the electrical energy provided by the photovoltaic power generation system 18 to the bus bar 4 may be transferred to the battery system 12, and the storage of the electrical energy may be performed by the battery system 12.
Therefore, by arranging the photovoltaic power generation system 18 and the energy storage system 19, when the mains supply is normal, the micro-grid control system is in grid-connected operation. When the commercial power is abnormal, the microgrid controller 8 cuts off the medium-voltage switch 2, the PCS is started, the microgrid control system enters island operation, and the energy storage system 19 and the photovoltaic power generation system 18 supply power to the load 16 at the non-fault section through the box transformer 3. Wherein, the electric energy generated by the photovoltaic power generation system 18 is preferentially used, when the sum of the photovoltaic power generation power is larger than the demand of the load 16, the excess photovoltaic electric energy of the photovoltaic power generation system 18 charges the battery of the energy storage system 19, and when the battery is fully charged, the microgrid controller 8 performs power limiting control on the photovoltaic power to keep the energy balance of the system.
In order to facilitate the deployment of the microgrid control system, optionally, the energy storage system 19, the grid breakers 5 and the microgrid controllers 8 are mounted within the container 14. In this way, by arranging the container 14 with the energy storage system 19, the grid breaker 5 and the microgrid controller 8 installed, it is possible to install these components, thus achieving a fast establishment of the grid, and a convenient placement outdoors, at the same time facilitating a system joint debugging and an overall delivery.
For example, the utility model discloses in microgrid control system was arranged in mountain area medium voltage distribution network, this microgrid control system included 0.4kV generating line, photovoltaic power generation system 18, energy storage system 19, incasement power consumption 13, electric wire netting circuit breaker 5 and microgrid controller 8. The grid circuit breaker 5 is arranged on a grid-connected power distribution cabinet, wherein the energy storage system 19, the grid-connected power distribution cabinet and the microgrid controller 8 are arranged in the container 14 so as to be conveniently placed outdoors. The power of the photovoltaic power generation system 18 and the energy storage system 19 of the present example is output to a 0.4kV bus, and then is connected to a 10kV grid through the boosted box transformer substation 3. In a mountain medium voltage distribution network, the front section of the medium voltage switch 2 is connected with a 10kV power grid, the rear section of the medium voltage switch 2 is a load 16 side, the load 16 side comprises a load power grid 17, and the load power grid 17 comprises a plurality of power transformers 15. The mountain area medium voltage distribution network can supply power to mountain area villages through the load 16 side.
In the embodiment of the present invention, optionally, the microgrid controller 8 is used for controlling the switching-off or switching-on of the medium voltage switch 2 according to whether the medium voltage distribution network is abnormal or not. In this way, the microgrid controller 8 can control the medium voltage switch 2. The microgrid controller 8 establishes communication with the controller of the medium voltage switch 2, judges whether the power grid is abnormal or not by acquiring data at two ends of the medium voltage switch 2 and state information of the medium voltage switch 2, and sends a control signal according to a judgment result to control opening or closing of the medium voltage switch 2.
It is right the utility model discloses microgrid control system can carry out remote monitoring to all operating parameters to microgrid control system's each subassembly carry out analysis and management, with realization power consumption management and power consumption safety, and make fortune dimension personnel know microgrid control system real-time running state.
Next, the working process of the microgrid control system according to the embodiment of the present invention will be described by taking the microgrid control system shown in fig. 2 as an example.
1) When the 10kV main network is normal, the medium-voltage switch 2, the power grid circuit breaker 5, the PCS circuit breaker 7 and the photovoltaic circuit breaker 6 are all closed, the photovoltaic power generation system 18 and the energy storage system 19 are connected with the 10kV main network through the box transformer 3 to run in a grid-connected mode, and the photovoltaic power generation system 18 transmits electric energy to the power grid or charges a battery of the energy storage system 19. The pv inverter 9 operates in a Maximum Power Point Tracking (MPPT) mode, and the energy storage system 19 is in a standby state. If the microgrid controller 8 detects that the battery charge of the energy storage system 19 is lower than 0.9, an instruction is sent to the energy storage converter 10 to charge the battery. When the battery of the energy storage system 19 is charged, the electric quantity of the photovoltaic power generation system 18 is preferentially used.
2) When the 10kV main network has a fault, the fault can be divided into two fault conditions of the front section and the rear section of the medium-voltage switch 2.
Firstly, in the front section of the medium-voltage switch 2, the 10kV main network fails and has a power failure. At this time, the microgrid controller 8 disconnects the medium-voltage switch 2, and starts the PCS, the microgrid control system enters an isolated island operation, and the photovoltaic power generation system 18 and the energy storage system 19 supply power to the load 16 of the non-fault section of the power grid. Meanwhile, the microgrid control system sends out a fault mail to inform related workers of maintenance. At this time, the microgrid control system preferentially uses the electric energy generated by the photovoltaic power generation system 18, and when the sum of the photovoltaic power generation power is greater than the demand of the load 16 and the battery system 12 is fully charged, the microgrid controller 8 performs power-limiting control on the photovoltaic power of the photovoltaic power generation system 18 to keep the off-grid energy balance of the system. After the fault of the 10kV main network is cleared, the microgrid controller 8 closes the medium-voltage switch 2, and the microgrid control system and the external power grid are reconnected to enter a grid-connected operation state.
Therefore, the utility model discloses microgrid control system can improve the power supply reliability, reduces the trouble power off time. Under the condition of mains supply fault, the micro-grid is started to perform isolated island operation, necessary time is strived for power grid fault removal and power restoration, and therefore the power failure complaint rate of users can be reduced. In addition, the medium-voltage switch 2 is automatically controlled to build an intelligent power grid. When the power grid fails, the microgrid controller 8 sends out a control signal, the medium-voltage switch 2 is switched off, and the PCS is started in black, so that the microgrid enters an isolated island operation, and a load 16 of a non-failure section of the power grid is supplied with power by the photovoltaic power generation system 18 and the energy storage system 19. Meanwhile, the microgrid control system sends out a fault mail to inform related workers of maintenance. After the fault is cleared, the microgrid controller 8 controls the medium-voltage switch 2 to be closed, and the microgrid is reconnected with the external power grid to enter a grid-connected operation state.
Secondly, a fault occurs in the rear-end line of the medium-voltage switch 2, which causes the medium-voltage switch 2 to trip. And the microgrid control system is closed at the moment. Then the medium voltage switch 2 performs reclosing operation, if the reclosing fails, the microgrid controller 8 sends out a fault mail to inform related staff of maintenance. After the line fault is cleared, similarly, the microgrid controller 8 closes the medium-voltage switch 2, and the microgrid control system and the external power grid are reconnected to enter a grid-connected operation state.
Fig. 3 is a control flowchart of the microgrid controller 8 and the medium-voltage switch 2, and the microgrid control system performs cycle detection on the switching state and the operation of the medium-voltage switch 2, and performs the next operation according to the detection result. As can be seen from the flowchart, the microgrid control system has four operating states: grid-connected operation, closing, PCS black start and off-grid operation. The judgment logics of the four operation states are respectively as follows:
a) grid-connected operation: medium voltage switch 2 remote mode, medium voltage switch 2 closed and both ends powered;
b) closing: the medium-voltage switch 2 is in a remote mode, the medium-voltage switch 2 is disconnected, the front end of the medium-voltage switch is electrified, and the rear end of the medium-voltage switch is not electrified;
c) PCS Black Start: medium voltage switch 2 remote mode, medium voltage switch 2 off and no power at both ends;
d) and (3) off-grid operation: medium voltage switch 2 remote mode, medium voltage switch 2 disconnection and front end do not have the electricity rear end and have the electricity.
Through using the utility model discloses microgrid control system can be by energy storage battery and the distributed energy provide the back-up support for the electric wire netting jointly, has improved the power supply reliability, reduces trouble power off time. In addition, the microgrid control system can realize automatic intelligent control, and particularly realize automatic control of the medium-voltage switch 2. In addition, the distributed green energy consumption is promoted, the power supply capacity at the tail end of the line is improved under the condition that the distribution transformer capacity and the transmission line capacity are not increased, the power utilization access requirements of more users are met, and the investment of capacity increase and power supply point increase is reduced. And the microgrid control system is remotely monitored, the running state of the microgrid control system is mastered in real time, and the operation and maintenance cost can be reduced.
The utility model discloses microgrid control system still can improve distributed generator's utilization efficiency, and distributed generator is close from end user, need not pass through long distance transmission lines to the line loss is low. In addition, when the microgrid operates in an island mode, electric energy generated by a distributed power source (such as the photovoltaic power generation system 18) is still preferentially used.
The utility model discloses microgrid control system can also realize the scheduling of intelligent microgrid, guarantees microgrid control system steady operation. By comprehensively monitoring the micro-grid power generation equipment and evaluating the reserve capacity of the system in real time, basis and guarantee are provided for the establishment of a stable control strategy. By means of a stable and coordinated optimization scheduling mechanism, source-network-load-storage coordinated operation is achieved, comprehensive utilization efficiency of energy is effectively improved, and stable operation of a micro-grid control system is guaranteed.
To sum up, the utility model discloses microgrid control system is applied to the medium voltage distribution network, and the medium voltage distribution network includes major network 1, medium voltage switch 2 and load electric wire netting 17. The microgrid control system comprises a bus 4, a photovoltaic power generation system 18, an energy storage system 19, electricity utilization in a box 13, a power grid circuit breaker 5 and a microgrid controller 8. The photovoltaic power generation system 18 is electrically connected with the bus 4, the energy storage system 19 is electrically connected with the bus 4, and the box is electrically connected with the bus 4 by the electricity 13. One end of the power grid circuit breaker 5 is electrically connected with the bus 4, and the other end of the power grid circuit breaker 5 is electrically connected with the output end of the micro-grid control system. The output end of the microgrid control system is electrically connected between the medium-voltage switch 2 and the load power grid 17. The microgrid controller 8 is in communication with the medium voltage switch 2, the photovoltaic power generation system 18, the energy storage system 19 and the grid breaker 5, respectively. Therefore, when power supply abnormality occurs in the medium-voltage power distribution network, power supply is provided through the micro-grid control system, and power supply reliability of the power grid can be improved.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. The microgrid control system is characterized in that the microgrid control system is applied to a medium-voltage distribution network, and the medium-voltage distribution network comprises a main network, a medium-voltage switch and a load power grid;
the microgrid control system comprises: the system comprises a bus, a photovoltaic power generation system, an energy storage system, power utilization in a box, a power grid circuit breaker and a microgrid controller;
the photovoltaic power generation system is electrically connected with the bus, the energy storage system is electrically connected with the bus, and electricity used in the box is electrically connected with the bus;
one end of the power grid circuit breaker is electrically connected with the bus, and the other end of the power grid circuit breaker is electrically connected with the output end of the micro-grid control system;
the output end of the microgrid control system is electrically connected between the medium-voltage switch and the load power grid;
the microgrid controller is respectively in communication connection with the medium-voltage switch, the photovoltaic power generation system, the energy storage system and the power grid circuit breaker.
2. The microgrid control system of claim 1,
the photovoltaic power generation system comprises a photovoltaic circuit breaker, a photovoltaic inverter and a photovoltaic panel;
one end of the photovoltaic inverter is electrically connected with the photovoltaic circuit breaker, and the other end of the photovoltaic inverter is electrically connected with the photovoltaic plate;
the photovoltaic circuit breaker is electrically connected with the bus.
3. The microgrid control system of claim 1,
the energy storage system comprises an energy storage converter PCS circuit breaker, an energy storage converter and a battery system;
one end of the energy storage converter is electrically connected with the PCS circuit breaker, and the other end of the energy storage converter is electrically connected with the battery system;
the PCS breaker is electrically connected with the bus.
4. The microgrid control system of claim 3,
the battery system comprises a battery management system BMS;
the battery system is used for charging and discharging.
5. The microgrid control system of claim 1,
the output end of the microgrid control system is electrically connected with a box transformer substation, and the box transformer substation is electrically connected between the medium-voltage switch and the load power grid.
6. The microgrid control system of claim 5,
the main network is a 10kV main network, and the bus is a 0.4kV bus.
7. The microgrid control system of claim 1,
the energy storage system, the grid circuit breaker and the microgrid controller are mounted in a container.
8. The microgrid control system of claim 1,
the microgrid controller is in communication connection with the medium-voltage switch, the photovoltaic power generation system, the energy storage system and the power grid circuit breaker respectively by using a standard Modbus communication protocol.
9. The microgrid control system of claim 1,
the load power grid comprises a power transformer and a load;
one end of the power transformer is electrically connected with the load, and the other end of the power transformer is electrically connected with the medium-voltage switch.
10. The microgrid control system of claim 1,
and the microgrid controller is used for controlling the switching-off or switching-on of the medium-voltage switch according to whether the medium-voltage distribution network is abnormal or not.
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| CN110445184A (en) * | 2019-09-18 | 2019-11-12 | 广东电网有限责任公司 | A kind of microgrid control system |
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| CN110445184A (en) * | 2019-09-18 | 2019-11-12 | 广东电网有限责任公司 | A kind of microgrid control system |
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