CN115494777A - A microgrid control system - Google Patents

Abstract

The invention discloses a micro-grid control system, which includes several power units and subsystem controllers, the subsystem controllers establish communication connections with each power unit, the output terminals of each power unit are used to connect controlled electric equipment, and the subsystem controller Synchronize with the clock of each power unit; the subsystem controller obtains the power equipment monitoring information of the controlled power equipment, determines the power control command according to the power equipment monitoring information, and sends the power control command to each power unit; each power The unit regulates the power of the controlled electric equipment connected to the output end according to the power control instruction. The power regulation of the controlled power equipment is carried out through the monitoring information of the controlled power equipment, and the coordinated control of multiple types of power equipment is realized, which is applicable to the complex power consumption environment.

Description

A microgrid control system

technical field

The present invention relates to the technical field of power electronics, in particular to a microgrid control system.

Background technique

With the development of new energy technologies, related new energy industries such as photovoltaics, wind power, and energy storage are booming. Gradually entering everyone's field of vision, energy storage equipment is used on a large scale, and the supporting power router constitutes a micro-grid system, adapting to the supply-demand relationship under the new situation of "source-network-load-storage", and there are more and more types of power equipment in the grid. Therefore, how to realize the coordinated control of various types of power equipment has become an urgent technical problem to be solved.

The above content is only used to assist in understanding the technical solution of the present invention, and does not mean that the above content is admitted as prior art.

Contents of the invention

The main purpose of the present invention is to provide a micro-grid control system, which aims to solve the technical problem that the existing micro-grid control system cannot realize the coordinated control of multiple types of electric equipment.

To achieve the above object, the present invention provides a micro-grid control system, the micro-grid control system includes several power units and subsystem controllers, the subsystem controllers establish communication connections with each power unit, each power unit The output terminal is used to connect the controlled electric equipment, and the subsystem controller is synchronized with the clock of each power unit;

The subsystem controller is configured to acquire power equipment monitoring information of the controlled power equipment, determine a power control command according to the power equipment monitoring information, and send the power control command to each power unit;

Each power unit is used to adjust the power of the controlled electric equipment connected to the output terminal according to the power control instruction.

Optionally, the microgrid control system includes at least two subsystem controllers, a first communication connection is established between each subsystem controller, and each subsystem controller also establishes a second communication connection with a corresponding power unit, Each subsystem controller is synchronized with the clock of the power unit;

The first subsystem controller among the subsystem controllers is used to acquire the first electric equipment monitoring information and receive the second electric equipment monitoring information sent by other subsystem controllers through the first communication connection, according to the first The first electric equipment monitoring information and the second electric equipment monitoring information determine a power control instruction;

A power unit that establishes a communication connection with the first subsystem controller, configured to receive the power control instruction sent by the first subsystem controller through the second communication connection, and perform power control according to the power control instruction. Controlled electrical equipment performs power regulation.

Optionally, the microgrid control system further includes a system-level controller, a third communication connection is established between the system-level controller and each subsystem controller, and the system-level controller, each subsystem controller Synchronized with each power unit clock;

The system-level controller is configured to receive third power equipment monitoring information sent by each subsystem controller through the third communication connection, determine an energy distribution instruction according to the third power equipment monitoring information, and transfer the energy The allocation command is sent to each subsystem controller that establishes the third communication connection;

The first subsystem controller establishing a third communication connection with the system-level controller is configured to determine a power control instruction according to the energy distribution instruction, and issue the power control instruction to each of the sub-system controllers establishing the second communication connection. power unit.

Optionally, the microgrid control system further includes an integrated controller and a switch, and the integrated controller, the system-level controller and each subsystem controller are in the same local area network through the switch;

The integrated controller is configured to issue an energy scheduling instruction to the system-level controller through the switch;

The system-level controller is configured to analyze the energy distribution instruction from the energy scheduling instruction, and issue the energy distribution instruction to each subsystem controller establishing the third communication connection.

Optionally, a direct controller for communication connection is also arranged between each subsystem controller and the corresponding power unit;

The direct controller is configured to receive the power control instruction issued by the corresponding subsystem controller, and issue a power wave instruction to the corresponding power unit according to the power control instruction;

The power unit is further configured to adjust the power of the controlled electric equipment according to the power wave instruction.

Optionally, the microgrid control system further includes an integrated controller and a switch, and the integrated controller and each subsystem controller are in the same local area network through the switch;

The integrated controller is configured to issue an energy scheduling instruction to each subsystem controller in the same local area network through the switch;

The first subsystem controller among the subsystem controllers is further configured to determine a power control instruction corresponding to a power unit establishing a communication connection according to the energy scheduling instruction.

Optionally, a direct controller for communication connection is also set between each subsystem controller and the corresponding power unit, and the integrated controller, the direct controller and each subsystem controller are in the same local area network through the switch Inside, each subsystem controller, direct controller and each power unit clock are synchronized;

The first subsystem controller among the subsystem controllers is further configured to issue a power control instruction to the direct controller according to the energy scheduling instruction issued by the integrated controller;

The direct controller is configured to issue a power wave instruction to a power unit establishing a communication connection according to the power control instruction;

The power unit is further configured to adjust the power of the controlled electric equipment according to the power wave instruction.

Optionally, the microgrid control system further includes a system-level controller, the system-level controller establishes a fourth communication connection with each subsystem controller, the system-level controller, the integrated controller, each The subsystem controller and the direct controller are in the same local area network through the switch;

The system-level controller is configured to receive an energy scheduling instruction issued by the integrated controller through the switch, and parse out an energy allocation instruction from the energy scheduling instruction, and issue the energy allocation instruction to the establishment Each subsystem controller of the fourth communication connection;

The first subsystem controller among the subsystem controllers is configured to analyze the power control instruction from the energy distribution instruction, and issue the power control instruction to the direct controller connected by communication.

Optionally, the system-level controller is further configured to collect operation information of each subsystem controller, and upload the operation information to the integrated controller;

The integrated controller is further configured to determine the operating status of each subsystem controller according to the operating information.

Optionally, the direct controller is further configured to receive device status information uploaded by the communication-connected power unit, and upload the device status information to the communication-connected subsystem controller.

The present invention proposes a micro-grid control system. The micro-grid control system includes several power units and subsystem controllers. The subsystem controllers establish communication connections with each power unit. The output terminals of each power unit are used to connect to the controlling the power equipment, the subsystem controller is synchronized with the clock of each power unit; the subsystem controller is used to obtain the power equipment monitoring information of the controlled power equipment, determine the power control instruction according to the power equipment monitoring information, and Sending the power control instruction to each power unit; each power unit is used to adjust the power of the controlled electric equipment connected to the output terminal according to the power control instruction. The neutron system controller of the present invention determines the power control instruction according to the monitoring information of the electric equipment, sends the power control instruction to each power unit, and the power unit adjusts the power of the controlled electric equipment according to the received power control instruction, The monitoring information of the equipment adjusts the power of the controlled electric equipment, realizes the coordinated control of multiple types of electric equipment, and is applicable to complex power consumption environments.

Description of drawings

Fig. 1 is a structural block diagram of the first embodiment of the microgrid control system of the present invention;

Fig. 2 is a structural block diagram of the second embodiment of the microgrid control system of the present invention;

Fig. 3 is a structural block diagram of the third embodiment of the microgrid control system of the present invention;

Fig. 4 is a structural block diagram of the fourth embodiment of the microgrid control system of the present invention;

Fig. 5 is a structural block diagram of the fifth embodiment of the microgrid control system of the present invention;

Fig. 6 is a structural block diagram of the sixth embodiment of the microgrid control system of the present invention;

Fig. 7 is a structural block diagram of the seventh embodiment of the microgrid control system of the present invention;

Fig. 8 is a structural block diagram of the eighth embodiment of the microgrid control system of the present invention.

Figures and descriptions:

10 subsystem controller 20 power unit 30 System Level Controller 40 Integrated controller 50 switch 60 direct controller A Subsystem Controller Layer B power unit layer C System Level Controller Layer D. Integrated Controller Layer E. direct controller layer K LAN connection L EtherCAT connection m fiber optic connection N Clock Line Connection

The realization of the purpose of the present invention, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

detailed description

It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Referring to FIG. 1 , FIG. 1 is a structural block diagram of the first embodiment of the microgrid control system of the present invention.

As shown in Figure 1, the microgrid control system includes a subsystem controller 10 and several power units 20, the subsystem controller 10 establishes a communication connection with each power unit 20, and the output terminals of each power unit 20 are used to connect Controlled electric equipment, the subsystem controller 10 is clock-synchronized with each power unit 20;

The subsystem controller 10 is configured to obtain power equipment monitoring information of the controlled power equipment, determine a power control instruction according to the power equipment monitoring information, and issue the power control instruction to each power unit 20; each power A unit 20, configured to adjust the power of the controlled electric equipment connected to the output end according to the power control instruction.

In this embodiment, the power equipment monitoring information may be the monitoring information of the controlled power equipment controlled by the power unit connected to the subsystem controller in communication, and the power equipment monitoring information includes information such as power generation, power consumption, operating voltage, and operating current. ; The controlled power equipment includes power generation equipment and power consumption equipment, and the power generation equipment can be photovoltaic equipment, wind power equipment and hydropower equipment, etc.

Determining the power control instruction according to the monitoring information of the electric equipment may be determining the electric power or generating power of each controlled electric equipment according to the electric equipment monitoring information, and determining the power control instruction according to the electric power or generating power of each controlled electric equipment; the power control instruction It may be an instruction to control the controlled electrical equipment to perform power input or output.

This embodiment proposes a micro-grid control system, the micro-grid control system includes several power units and subsystem controllers, the subsystem controllers establish communication connections with each power unit, and the output terminals of each power unit are used to connect For the controlled electric equipment, the subsystem controller is synchronized with the clocks of each power unit; the subsystem controller is used to obtain the electric equipment monitoring information of the controlled electric equipment, and determine the power control instruction according to the electric equipment monitoring information, and sending the power control instruction to each power unit; each power unit is used to adjust the power of the controlled electric equipment connected to the output end according to the power control instruction. In this embodiment, the subsystem controller determines the power control command according to the monitoring information of the power equipment, and sends the power control command to each power unit. The power unit adjusts the power of the controlled power device according to the received power control command. The monitoring information of the power equipment adjusts the power of the controlled power equipment, realizes the coordinated control of multiple types of power equipment, and can be applied to complex power consumption environments.

In specific applications, it may be necessary to carry out two-way mobilization of electric energy across regions, but redeveloping a new control platform requires a relatively large development cost. Therefore, based on the first embodiment above, a second embodiment of the microgrid control system is proposed. Referring to Figure 2, Fig. 2 is a structural block diagram of the second embodiment of the microgrid control system of the present invention.

As shown in Figure 2, the microgrid control system may also include at least two subsystem controllers 10, a first communication connection is established between each subsystem controller 10, and each subsystem controller 10 is also connected to a corresponding power unit 20 With the second communication connection established, each subsystem controller 10 is clock-synchronized with the power unit 20 .

It should be noted that the number of subsystem controllers can be determined according to the number of areas that require power regulation; the number of power units can be determined according to the number of controlled electrical equipment in a specific scenario; the second communication connection with the subsystem controller can be determined The power unit is controlled by the subsystem controller, and the number of power units establishing a second communication connection with each subsystem controller can be increased or decreased according to specific scenarios; The area P includes 5 controlled electric devices, and the area Q includes 8 controlled electric devices. Then, a subsystem controller can be set for each of P and Q, and 5 is set for the subsystem controller corresponding to P. 8 power units are set for the subsystem controller corresponding to Q.

In this embodiment, the communication connections established between the subsystem controllers are collectively referred to as the first communication connection; the communication connections established between the subsystem controllers and the corresponding power units are collectively referred to as the second communication connection; the first communication connection and The second communication connection may be a communication connection established through an optical fiber, a wireless network, etc., which is not limited in this embodiment.

It should be understood that the clock synchronization between the subsystem controllers and between the subsystem controllers and the power unit establishing the communication connection is also carried out through the clock line transmitting the clock signal. The specific way of connecting the clock line can refer to the The level of each subsystem controller in the microgrid control system can also be called A: subsystem controller layer; the level of each power unit in the microgrid controller can also be called B: power Unit layer; the specific connection manners of the first communication connection and the second communication connection can refer to M in FIG. 2 .

The first subsystem controller in each subsystem controller 10 is used to obtain the first electric equipment monitoring information and receive the second electric equipment monitoring information sent by other subsystem controllers through the first communication connection, according to the The first electric device monitoring information and the second electric device monitoring information determine a power control instruction.

In this embodiment, the control hardware architecture of the subsystem controller can be "ARM+FPGA+DSP", wherein the model of ARM can be Renesas R7S910056, the model of DSP can be TMS320F28337, and the model of DFPGA can be LFE5U-85F-7BG381I; Supports digital input and output, analog input and output, can set the protection strategy and status monitoring of the subsystem controller, information interaction and synchronization between ports, supports optical fiber transceiver and Ether CAT ring network, and the subsystem controller can upload operating data in real time Going to the upper level and receiving the control instructions issued by the upper level, the subsystem controller reserves a communication expansion interface to improve the communication compatibility of the subsystem controller.

The power unit can adopt H-bridge modular design, and the control hardware architecture can adopt "ARM+FPGA". The model of ARM can be STM32F407, and the model of FPGA can be EP4CE40F23I7N; ARM supports high-impedance isolation voltage acquisition, Hall current acquisition, temperature Acquisition, RS485 communication, FPGA can realize functions such as optical fiber communication, wave transmission and state detection; H-bridge architecture supports SiC and IGBT two specifications, combined with high-frequency transformers, constitutes an efficient DAB bidirectional topology or cascaded active rectification topology.

It should be noted that the first subsystem controller can be any subsystem controller, and the first subsystem controller can be set and determined; after the first subsystem controller is determined, all other subsystem controllers The system controller clock is synchronized; the first subsystem controller sends the clock signal to the communication-connected power unit through the clock line, so that the communication-connected power unit performs clock synchronization; the first subsystem controller sends the clock signal through the clock line Send to other subsystem controllers, so that other subsystem controllers send the received clock signal to the power unit connected by communication through the clock line to complete clock synchronization.

In this embodiment, the first power equipment monitoring information may be the monitoring information of the controlled power equipment controlled by the power unit communicatively connected with the first subsystem controller, and the first power equipment monitoring information includes power generation, power consumption, working Information such as voltage and working current; the monitoring information of the second power equipment includes the monitoring information of the controlled power equipment corresponding to the remaining subsystem controllers; the controlled power equipment includes power generation equipment and power consumption equipment, and the power generation equipment can be photovoltaic equipment, wind power equipment and hydropower equipment, etc.

Determining the power control instruction according to the first electric equipment monitoring information and the second electric equipment monitoring information may be determining the first power of the corresponding controlled electric equipment according to the first electric equipment monitoring information, and determining according to the second electric equipment monitoring information Corresponding to the second power of the controlled electric device, a power control instruction is determined according to the first power and the second power; the power control instruction may be an instruction for controlling the controlled electric device to perform power input or output.

The power unit 20 establishing a communication connection with the first subsystem controller is configured to receive the power control instruction sent by the first subsystem controller through the second communication connection, and Perform power regulation on controlled electrical equipment.

In a specific implementation, for example, there are three areas P, Q, and R, and the subsystem controllers corresponding to P, Q, and R are respectively the first subsystem controller 201, the second subsystem controller 202, and the third subsystem controller. The controllers 203 and 201 determine that the power consumption is 10KW according to the obtained first electric equipment monitoring information, determine that the first generated power is 8KW according to the second electric equipment monitoring information sent in 202, and determine the second electric power according to the second electric equipment monitoring information sent in 203 2. The power generation power is 5KW, then the power control command can be: 201 sends the control command of transferring 10KW electric energy to the power unit connected by communication, sends the control command of transferring 5KW electric energy to 202, and sends the control command of transferring 5KW electric energy to 203 , each subsystem controller sends the control command to the corresponding power unit, and the power unit controls the corresponding controlled electric equipment to output or input electric energy according to the received control command, so as to realize the scheduling and distribution of energy. EXAMPLE LIMITATIONS.

This embodiment proposes a micro-grid control system, the micro-grid control system includes at least two subsystem controllers, a first communication connection is established between each subsystem controller, and each subsystem controller is also connected to a corresponding power unit The second communication connection is established, and each subsystem controller is synchronized with the clock of the power unit; the first subsystem controller in each subsystem controller is used to obtain the monitoring information of the first power equipment and receive the other subsystem controllers through all the other subsystem controllers. The second power equipment monitoring information sent by the first communication connection, and determine the power control instruction according to the first power equipment monitoring information and the second power equipment monitoring information; establish a communication connection with the first subsystem controller The power unit is configured to receive the power control instruction sent by the first subsystem controller through the second communication connection, and adjust the power of the controlled electric equipment according to the power control instruction. In this embodiment, the interaction of power equipment monitoring information is realized through the first communication connection, and the power control command determined according to the power equipment monitoring information is sent to the corresponding power unit through the second communication connection, so that the power unit can control the received power according to the power control command. Control the power equipment to adjust the power, realize the control of two-way mobilization of electric energy between regions, and only need to increase the corresponding number of subsystem controllers and power units according to the number of regions on the basis of the first embodiment above, and solve the problem of control The technical problem of repeated development of the platform improves the compatibility of the microgrid control system and reduces the development cost.

Referring to FIG. 3 , FIG. 3 is a structural block diagram of a third embodiment of a microgrid control system according to the present invention.

As shown in FIG. 3, based on the second embodiment above, the microgrid control system may further include: a system-level controller 30, and a third communication connection is established between the system-level controller 30 and each subsystem controller 10 , the clocks of the system-level controller 30 , each subsystem controller 10 and each power unit 20 are synchronized.

It should be noted that the number of system-level controllers can be set according to the scale of the controlled electrical equipment. When the scale of the controlled electrical equipment is large, multiple system-level controllers can be set, which is not limited in this embodiment; The control hardware architecture of the system-level controller can be "ARM+FPGA", the ARM model can be AM3352, and the FPGA model can be LFE5U-85F-7BG381I; the system-level controller and each subsystem controller can be connected through Ether CAT The ring network establishes the third communication connection. The specific method of Ether CAT connection can refer to L in Figure 3. The system-level controller sends a clock signal to each subsystem controller for clock synchronization through the clock line; the system-level controller can also use the Ether NET uploads the operating status and operating data of each subsystem controller; it can support multiple digital input and output, reserve CAN, RS485 and other communication interfaces, and also support functions such as HMI expansion.

In this embodiment, the level of the system-level controller in the microgrid control system can be referred to as C: the system-level controller layer; The subsystem controllers perform clock synchronization.

The system-level controller 30 is configured to receive third power equipment monitoring information sent by each subsystem controller through the third communication connection, determine an energy allocation instruction according to the third power equipment monitoring information, and send the The energy allocation command is sent to each subsystem controller establishing the third communication connection.

Compared with the micro-grid control system in the second embodiment, the micro-grid control system proposed in this embodiment adds a system-level controller, can access more controlled electric equipment, and does not need to develop a new control system, only A new system-level controller needs to be added on the basis of the microgrid control system in the second embodiment above, which reduces the development cost.

In this embodiment, the third power equipment monitoring information may be the monitoring information of the corresponding controlled power equipment uploaded by each subsystem controller; the energy distribution instruction may be an instruction for energy scheduling between the regions corresponding to the subsystem controllers , the energy allocation instruction includes an energy transfer-in instruction and an energy transfer-out instruction.

The first subsystem controller establishing a third communication connection with the system-level controller is configured to determine a power control instruction according to the energy distribution instruction, and issue the power control instruction to each of the sub-system controllers establishing the second communication connection. power unit.

Determining the power control instruction according to the energy distribution instruction may be analyzing the power control instruction from the energy distribution instruction; the power unit controls the corresponding controlled electric device to output or input electric energy according to the issued power control instruction.

In a specific implementation, for example, there are three areas P, Q, and R, and the subsystem controllers corresponding to P, Q, and R are respectively the first subsystem controller 201, the second subsystem controller 202, and the third subsystem controller. 203, the third power equipment monitoring information obtained by the system-level controller is: 201 corresponds to the power consumption of the controlled power equipment is 10KW, 202 corresponds to the power generation of the controlled power equipment is 8KW, and 203 corresponds to the power generation of the controlled power equipment If the power is 5KW, the energy distribution instruction can be "201 transfers 10KW electric energy, 202 transfers 5KW electric energy, 203 transfers 5KW electric energy", and sends the energy distribution instruction to each subsystem controller, 201, 202 and 203 analyze the energy The corresponding power control commands obtained by the allocation command are: transfer in 10KW electric energy, transfer out 5KW electric energy, and transfer out 5KW electric energy. The controlled electric equipment outputs or inputs electric energy, and the system-level controller implements energy scheduling and distribution. The above example does not constitute a limitation to this embodiment.

The microgrid control system proposed in this embodiment also includes a system-level controller, and a third communication connection is established between the system-level controller and each subsystem controller, and the system-level controller, each subsystem controller and The clocks of each power unit are synchronized; the system-level controller is configured to receive third power equipment monitoring information sent by each subsystem controller through the third communication connection, and determine an energy allocation instruction according to the third power equipment monitoring information , and issue the energy allocation instruction to each subsystem controller that establishes a third communication connection; the first subsystem controller that establishes a third communication connection with the system-level controller is used to The command determines the power control command, and issues the power control command to each power unit that establishes the second communication connection. In this embodiment, the system-level controller is used to implement energy scheduling between regions, which improves the compatibility of the micro-grid control system and reduces the development cost. Based on the existing micro-grid control system, adding a system-level controller reduces the need for redevelopment. system cost.

Referring to FIG. 4 , FIG. 4 is a structural block diagram of a fourth embodiment of a microgrid control system according to the present invention.

As shown in FIG. 4, based on the above-mentioned third embodiment, the microgrid control system may further include: an integrated controller 40 and a switch 50, the integrated controller 40, the system-level controller 30 and each subsystem controller 10 are in the same local area network through the switch 50.

It should be noted that the integrated controller can be a remote integrated control computer, which can issue energy scheduling instructions through a local area network or Ethernet, and can also receive equipment monitoring data uploaded by the next-level controller, and store the equipment monitoring data to the target In the memory; the level of the integrated controller in the microgrid control system can be called D: integrated controller layer.

The integrated controller 40 is configured to issue an energy scheduling instruction to the system-level controller 30 through the switch;

The system-level controller 30 is configured to analyze the energy distribution instruction from the energy scheduling instruction, and issue the energy distribution instruction to each subsystem controller 10 establishing the third communication connection.

In this embodiment, the energy dispatching instruction may be determined according to the power equipment monitoring information of the controlled electric equipment, or it may be an instruction issued by the user through the integrated controller, which is not limited in this embodiment; the energy dispatching instruction may be Instructions for power scheduling between different areas; the integrated controller 40, the system-level controller 30 and the subsystem controller 10 are in the same local area network through the switch 50, and the way of connecting the local area network can refer to K in FIG. 4 .

In a specific implementation, the integrated controller 40 sends an energy scheduling instruction to the system-level controller 30 through the switch 50, and the system-level controller 40 parses the energy distribution instruction from the energy scheduling instruction, and transmits the energy distribution instruction through the EtherCAT ring network. Send to each subsystem controller, each subsystem controller parses the corresponding power control command from the energy distribution command, and sends the power control command to the power unit connected by communication, so that the power unit controls the corresponding controlled power The equipment outputs or inputs electric energy, and the energy scheduling and distribution are realized through the integrated controller.

The example microgrid control system of this embodiment also includes an integrated controller and a switch, and the integrated controller, the system-level controller, and each subsystem controller are in the same local area network through the switch; the integrated controller uses sending an energy scheduling instruction to the system-level controller through the switch; the system-level controller is configured to analyze the energy allocation instruction from the energy scheduling instruction, and issue the energy allocation instruction to the Each subsystem controller establishes the third communication connection. In this embodiment, a system-level controller is set between the integrated controller and the subsystem controller, and the integrated controller is decoupled from the subsystem controller. System compatibility reduces development costs.

Referring to FIG. 5 , FIG. 5 is a structural block diagram of a fifth embodiment of the microgrid control system of the present invention.

As shown in FIG. 5 , based on the above-mentioned third embodiment, a direct controller 60 for communication connection is also provided between each subsystem controller and the corresponding power unit.

The direct controller 60 is configured to receive the power control instruction issued by the corresponding subsystem controller 10, and issue a power wave instruction to the corresponding power unit 20 according to the power control instruction;

The power unit 20 is further configured to adjust the power of the controlled electric equipment according to the power wave instruction.

It should be noted that the direct controller is in the link between the previous and the next, and the optical fiber interface can be expanded. For systems with small product scales, the direct controller can be cut. For systems with large product scales, such as megawatt-class multi-port power routers, For multi-parallel high-voltage products, the direct controller can be used to realize power fast loop control of multi-subsystem controllers, multi-unit clock synchronization, multi-fiber communication, local storage of black box data and other functions; the control architecture of the direct controller can be "ARM +FPGA", where the ARM model can be STM32F407, and the FPGA model can be LFE5U-85F-7BG381I; establish communication with the background Ethernet through ARM to upload black box data for storage, and realize multi-fiber communication and power fast loop calculation through FPGA , voltage equalization algorithm, current equalization algorithm, fault state detection and other functions; the power method wave instruction can be an instruction to control the duty cycle of the PWM waveform; the level of the direct controller in the microgrid control system can be called E: direct controller layer.

In a specific implementation, the system-level controller receives the third power equipment monitoring information sent by each subsystem controller, determines the energy distribution command according to the third power equipment monitoring information, and sends the energy distribution command to each subsystem through the Ether CAT ring network. Subsystem controller, each subsystem controller parses out the corresponding power control command from the energy distribution command, and sends the power control command to the direct controller connected by communication, and the direct controller provides the power for the communication connection according to the power control command The unit distributes the power wave command, and the power unit outputs PWM waves to drive the corresponding controlled electric equipment to perform power regulation according to the power wave command, so as to realize power scheduling.

In this embodiment, a direct controller for communication connection is also provided between each subsystem controller and the corresponding power unit; the direct controller is used to receive the power control instruction issued by the corresponding subsystem controller, and Sending a power wave command to a corresponding power unit according to the power control command; and the power unit is further configured to perform power regulation on the controlled electric equipment according to the power wave command. In this embodiment, the power unit is controlled by a direct controller, which can enhance the parallel control of multiple power units, realize fast coordinated control of power flow, improve control accuracy and improve system stability at the same time. Adding a direct controller to the power grid control system does not require repeated development of a new control system, reducing development costs.

Referring to FIG. 6 , FIG. 6 is a structural block diagram of a sixth embodiment of the microgrid control system of the present invention.

As shown in Fig. 6, based on the second embodiment above, the microgrid control system may further include: an integrated controller 40 and a switch 50, and the integrated controller 40 and each subsystem controller 10 are in the same In LAN;

The integrated controller 40 is configured to issue an energy scheduling instruction to each subsystem controller 10 in the same local area network through the switch;

The first subsystem controller among the subsystem controllers is further configured to determine a power control instruction corresponding to the power unit 20 establishing a communication connection according to the energy scheduling instruction.

In a specific implementation, the integrated controller 40 sends the energy scheduling instruction to each subsystem controller 10 through the switch 50, and each subsystem controller 10 parses the power control instruction from the energy scheduling instruction, and sends the power control instruction to The power unit connected by communication, the power unit controls the corresponding controlled electric equipment to input or output electric energy according to the power control command, so as to realize the scheduling and distribution of energy among different regions.

In this embodiment, the microgrid control system includes an integrated controller, a switch, a subsystem controller, and a power unit, and can directly send energy scheduling instructions to subsystem controllers in the same local area network through the integrated controller, which improves the microgrid control. System compatibility reduces development costs.

Referring to FIG. 7 , FIG. 7 is a structural block diagram of a seventh embodiment of a microgrid control system according to the present invention.

As shown in FIG. 7 , based on the above-mentioned seventh embodiment, a direct controller 60 for communication connection is also provided between each subsystem controller 10 and the corresponding power unit 20, the integrated controller 40, the direct controller 60 and each subsystem controller 10 are in the same local area network through the switch 50, each subsystem controller 10, direct controller 60 and each power unit 20 clock synchronization;

The first subsystem controller in each subsystem controller 10 is further configured to issue a power control instruction to the direct controller 60 according to the energy scheduling instruction issued by the integrated controller 40;

The direct controller 60 is configured to issue a power wave instruction to the power unit 20 establishing a communication connection according to the power control instruction;

The power unit 20 is further configured to adjust the power of the controlled electric equipment according to the power wave instruction.

In a specific implementation, the integrated controller 40 sends an energy scheduling instruction to each subsystem controller 10 through the switch 50, and each subsystem controller 10 parses the corresponding power control instruction from the energy scheduling instruction, and issues the power control instruction To the direct controller 60 connected by communication, the direct controller 60 determines the power wave command of each power unit 20 according to the power control command, and sends the power wave command to the corresponding power unit 20, and the power unit 20 transmits wave according to the power The command outputs PWM waves to drive the corresponding controlled electrical equipment for power regulation, so as to realize power scheduling.

The microgrid control system in this embodiment includes an integrated controller, a switch, a subsystem controller, a direct controller, and a power unit. Through the direct controller, the parallel control of multiple power units is enhanced, and the control of the medium-voltage power system or high-voltage The multi-level cascade control required in the power system, and the number of power units can be expanded through the direct controller, improves the compatibility of the microgrid control system while improving the fast-loop power control.

Referring to FIG. 8 , FIG. 8 is a structural block diagram of an eighth embodiment of a microgrid control system according to the present invention.

As shown in FIG. 8, based on the seventh embodiment above, the microgrid control system further includes a system-level controller 30, and the system-level controller 30 establishes a fourth communication connection with each subsystem controller 10. The The system-level controller 30, the integrated controller 40, each subsystem controller 10 and the direct controller 60 are in the same local area network through the switch 50;

The system-level controller 30 is configured to receive the energy dispatching instruction issued by the integrated controller 40 through the switch 50, analyze the energy allocation instruction from the energy dispatching instruction, and issue the energy allocation instruction sent to each subsystem controller 10 establishing the fourth communication connection;

The first subsystem controller in each subsystem controller 10 is configured to analyze the power control instruction from the energy distribution instruction, and send the power control instruction to the direct controller 60 connected by communication.

It should be noted that the micro-grid control system in this embodiment adopts five-layer control, and the micro-grid controllers proposed in the above-mentioned embodiments can be obtained by tailoring the micro-grid control system in this embodiment; The integrated controller, switch, system-level controller and direct controller of the microgrid control system are tailored to obtain the microgrid control system in the second embodiment; the integrated controller, switch and direct controller of the microgrid control system in this embodiment are The controller is cut out to obtain the microgrid control system in the third embodiment; the direct controller of the microgrid control system in this embodiment is cut out to obtain the microgrid control system in the fourth embodiment; the microgrid control system in this embodiment is The integrated controller and switch of the control system are tailored to obtain the micro-grid control system in the fifth embodiment; the system-level controller and direct controller of the micro-grid control system in this embodiment are tailored to obtain the micro-grid control system in the sixth embodiment The grid controller; tailor the system-level controller of the micro-grid control system in this embodiment to obtain the micro-grid controller in the seventh embodiment; the micro-grid control system in this embodiment can be tailored to meet different functional requirements Other microgrid controllers, while reducing product development costs and hardware costs, improve the compatibility of microgrid control systems.

In a specific implementation, the integrated controller 40 is in a unified local area network with the system-level controller 30, the subsystem controller 10 and the direct controller 60 through the switch 50, and the way of connecting the local area network can refer to K in FIG. 8; the system-level controller 30 and the subsystem control 10 establish a communication connection through the EtherCAT (Ethernet Control Automation Technology) ring network mode, and the EtherCAT connection mode can refer to L among Fig. 8; the system-level controller 30 sends a clock signal to each Subsystem controllers 10, each subsystem controller 10 sends the clock signal to the direct controller 60 through the optical fiber to establish a communication connection through the clock line, and the direct controller 60 then sends the clock signal to the direct controller 60 through the clock line to establish communication through the optical fiber The connected power unit 20 completes the clock synchronization. The method of clock line connection can refer to N in FIG. 8, and the method of optical fiber connection can refer to M in FIG. The level controller 30 and the system level controller 50 analyze the energy allocation instruction from the energy dispatching instruction, and issue the energy allocation instruction to the communication-connected subsystem controller 10, and the subsystem controller 10 analyzes the energy allocation instruction The power control command of each controlled electric equipment, and send the power control command to the direct controller 60 connected by communication, the direct controller 60 determines the power wave command of each power unit 20 according to the power control command, and sends the power wave The command is issued to the corresponding power unit 20, and the power unit 20 drives the corresponding controlled electric device to perform power regulation by outputting PWM waves according to the power wave command, so as to realize power scheduling.

Further, in order to know the running state of the system in time, the system-level controller is also used to collect the running information of each subsystem controller, and upload the running information to the integrated controller; the integrated controller , and is also used to determine the running state of each subsystem controller according to the running information.

In the specific implementation, the system-level controller collects the operating information of each subsystem controller, and uploads the operating information to the integrated controller. The integrated controller stores the operating information in the target memory, and determines each subsystem controller according to the operating information. The operating status of the system, the operating information includes information such as operating voltage, operating current, overvoltage and overcurrent status; the subsystem controller can also upload the black box data and system operating data to the system-level controller.

Further, in order to monitor the operating state of the power unit in real time to improve the security of the microgrid control system, the direct controller is also used to receive the device status information uploaded by the power unit connected by communication, and send the device Status information is uploaded to the communicatively connected subsystem controllers.

In specific implementation, the direct controller receives the device status information uploaded by the power unit, and uploads the device status information to the subsystem controller, and the subsystem controller can also upload the device status information to the system-level controller, so that the system-level control The device uploads the device status information to the integrated controller, and the device status information includes information such as the working voltage, working current, and working temperature of the power unit.

Further, in order to monitor the operating status of the equipment, the system-level controller is also used to monitor the operating status of each electric equipment in the microgrid.

The micro-grid control system of this embodiment includes an integrated controller, a switch, a system-level controller, a subsystem controller, a direct controller, and a power unit. Based on the micro-grid control system of this embodiment, module tailoring can be performed to obtain The micro-grid controller with functional requirements does not need to repeatedly develop the micro-grid control system for different application scenarios, and can be compatible with different application scenarios. While reducing product development costs and hardware costs, it improves the compatibility of the micro-grid control system.

It should be noted that, as used herein, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or system comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or system. Without further limitations, an element defined by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article or system comprising that element.

The serial numbers of the above embodiments of the present invention are for description only, and do not represent the advantages and disadvantages of the embodiments.

The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process conversion made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technical fields , are all included in the scope of patent protection of the present invention in the same way.

Claims (10)

1. A micro-grid control system, characterized in that, the micro-grid control system includes several power units and subsystem controllers, and the subsystem controllers establish a communication connection with each power unit, and the output ends of each power unit are used For connecting controlled electrical equipment, the subsystem controller is synchronized with each power unit clock; The subsystem controller is configured to acquire power equipment monitoring information of the controlled power equipment, determine a power control command according to the power equipment monitoring information, and issue the power control command to each power unit; Each power unit is used to adjust the power of the controlled electric equipment connected to the output terminal according to the power control instruction. 2. The micro-grid control system according to claim 1, wherein the micro-grid control system comprises at least two subsystem controllers, a first communication connection is established between each subsystem controller, each subsystem control The controller also establishes a second communication connection with the corresponding power unit, and each subsystem controller is synchronized with the clock of the power unit; The first subsystem controller among the subsystem controllers is used to acquire the first electric equipment monitoring information and receive the second electric equipment monitoring information sent by other subsystem controllers through the first communication connection, according to the first The first electric equipment monitoring information and the second electric equipment monitoring information determine a power control command; A power unit that establishes a communication connection with the first subsystem controller, configured to receive the power control instruction sent by the first subsystem controller through the second communication connection, and perform power control according to the power control instruction. Controlled electrical equipment performs power regulation. 3. The micro-grid control system according to claim 2, wherein the micro-grid control system further comprises a system-level controller, and a third communication is established between the system-level controller and each subsystem controller connected, the system-level controller, each subsystem controller, and each power unit clock are synchronized; The system-level controller is configured to receive third power equipment monitoring information sent by each subsystem controller through the third communication connection, determine an energy distribution instruction according to the third power equipment monitoring information, and transfer the energy The allocation command is sent to each subsystem controller that establishes the third communication connection; The first subsystem controller establishing a third communication connection with the system-level controller is configured to determine a power control instruction according to the energy distribution instruction, and issue the power control instruction to each of the sub-system controllers establishing the second communication connection. power unit. 4. The micro-grid control system according to claim 3, wherein the micro-grid control system also includes an integrated controller and a switch, the integrated controller, the system-level controller and each subsystem controller Being in the same local area network through the switch; The integrated controller is configured to issue an energy scheduling instruction to the system-level controller through the switch; The system-level controller is configured to analyze the energy distribution instruction from the energy scheduling instruction, and issue the energy distribution instruction to each subsystem controller establishing the third communication connection. 5. The microgrid control system as claimed in claim 3, wherein a direct controller for communication connection is also arranged between each subsystem controller and the corresponding power unit; The direct controller is configured to receive the power control instruction issued by the corresponding subsystem controller, and issue a power wave instruction to the corresponding power unit according to the power control instruction; The power unit is further configured to adjust the power of the controlled electric equipment according to the power wave instruction. 6. The micro-grid control system according to claim 2, wherein the micro-grid control system also includes an integrated controller and a switch, and the integrated controller and each subsystem controller are in the same local area network through the switch Inside; The integrated controller is configured to issue an energy scheduling instruction to each subsystem controller in the same local area network through the switch; The first subsystem controller among the subsystem controllers is further configured to determine a power control instruction corresponding to a power unit establishing a communication connection according to the energy scheduling instruction. 7. The microgrid control system as claimed in claim 6, wherein a direct controller for communication connection is also arranged between each subsystem controller and the corresponding power unit, the integrated controller, the direct control The controller and each subsystem controller are in the same local area network through the switch, and the clocks of each subsystem controller, direct controller and each power unit are synchronized; The first subsystem controller among the subsystem controllers is further configured to issue a power control instruction to the direct controller according to the energy scheduling instruction issued by the integrated controller; The direct controller is configured to issue a power wave instruction to a power unit establishing a communication connection according to the power control instruction; The power unit is further configured to adjust the power of the controlled electric equipment according to the power wave instruction. 8. The micro-grid control system according to claim 7, wherein the micro-grid control system further comprises a system-level controller, and the system-level controller establishes a fourth communication connection with each subsystem controller, The system-level controller, the integrated controller, each subsystem controller and the direct controller are in the same local area network through the switch; The system-level controller is configured to receive an energy scheduling instruction issued by the integrated controller through the switch, and parse out an energy allocation instruction from the energy scheduling instruction, and issue the energy allocation instruction to the establishment Each subsystem controller of the fourth communication connection; The first subsystem controller among the subsystem controllers is configured to analyze the power control instruction from the energy distribution instruction, and issue the power control instruction to the direct controller connected by communication. 9. The microgrid control system according to claim 4 or 8, wherein the system-level controller is also used to collect operating information of each subsystem controller, and upload the operating information to the integrated controller; The integrated controller is further configured to determine the operating status of each subsystem controller according to the operating information. 10. The micro-grid control system according to claim 8, wherein the direct controller is further configured to receive device status information uploaded by the communication-connected power unit, and upload the device status information to the communication-connected subsystem controller.

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