An intelligent operation and maintenance control system and method for an unattended microgrid

Abstract

The present invention discloses an intelligent operation and maintenance control system and method for an unattended microgrid, including: an information acquisition module for real-time acquisition and recording of microgrid operation status information, sending alarm information when the microgrid operation status changes, and receiving and executing control operations of an intelligent sequence control module; a fault discrimination module for judging whether a microgrid fails, and if a fault occurs, identifying the microgrid fault component and generating a fault discrimination result; a system analysis and decision module for selecting matching fault handling measures from a microgrid strategy table; an intelligent sequence control module for generating a multi-step control operation that can be continuously executed according to the fault handling measures; and a remote management module for remotely managing the microgrid operation status, the microgrid strategy table, and the operation steps of the intelligent sequence control module. The present invention can realize the operation and maintenance control of a microgrid in an unattended situation, and expand the social and economic benefits of the microgrid.

Description

Technical Field

[0001] The present invention relates to an intelligent operation and maintenance control system and method for an unattended microgrid, belonging to the technical field of microgrid automation. Background Art

[0002] Microgrids are usually small power generation and distribution systems composed of distributed generation units, energy storage devices, energy conversion devices, related loads and monitoring and protection devices. With the development of microgrid technology, microgrids have been widely popularized and applied overseas and in remote areas of China. Although microgrids are small in size, they involve multiple subdivided technical fields of power systems, which have high requirements on the knowledge system and work skills of operation and maintenance personnel. On the other hand, the site environment of microgrids is usually harsh and transportation is inconvenient. Therefore, most of the current microgrid projects are either unmanned or employ professional operation and maintenance teams for on-site maintenance. However, the former cannot handle abnormalities in time, resulting in low efficiency and cannot give full play to the role of microgrids. The latter has high operating costs, which reduces the economic efficiency of using microgrids. It is an indispensable part of the future development of microgrids for microgrids to complete operation and maintenance control operations autonomously and intelligently and realize the efficient and economic operation of unmanned microgrids. Therefore, it is urgent to study microgrid intelligent operation and maintenance technology and develop unmanned intelligent operation and maintenance control systems for microgrids. Summary of the invention

[0003] The present invention proposes an intelligent operation and maintenance control system and method for a microgrid, aiming to solve the problem that current microgrid control products do not realize functions such as power supply restoration after a fault, fault isolation, automatic switching of operation modes and strategies, automatic battery maintenance and remote management in an unattended situation, which seriously weakens the social and economic benefits brought by the microgrid system.

[0004] In order to solve the above technical problems, the present invention adopts the following technical means:

[0005] In a first aspect, the present invention proposes an intelligent operation and maintenance control system for an unattended microgrid, comprising:

[0006] The information collection module is used to collect and record the operating status information of the primary and secondary equipment of the microgrid in real time through the communication channel. When the operating status of the microgrid changes, it sends alarm information to the fault identification module and the remote management module. On the other hand, it is used to receive and execute the control operations of the intelligent sequence control module;

[0007] A fault identification module is used to determine whether a microgrid fault occurs based on the collected operating status information after receiving the alarm information. If a fault occurs, the fault component of the microgrid is identified, a fault identification result is generated, and the microgrid state change information and the fault identification result are sent to the system analysis and decision module;

[0008] The system analysis and decision-making module is used to select matching fault handling measures from a pre-built microgrid strategy table according to the microgrid state change information and fault identification results;

[0009] Intelligent sequential control module, used to generate multiple steps of control operations that can be executed continuously according to fault handling measures, send the control operations to the information acquisition module and obtain the operation execution results. Each step of the control operation includes the execution operation preconditions, execution operation content, and execution operation result verification;

[0010] The remote management module is used to remotely manage the microgrid operating status, microgrid strategy table and operation steps of the intelligent sequential control module.

[0011] In combination with the first aspect, further, the information collection module includes a communication model configuration unit, an information collection and recording unit, an alarm information push unit and a control execution unit; wherein the communication model configuration unit is used to configure the communication information model of the microgrid controller, and form a communication channel between the primary and secondary devices of the microgrid, the microgrid controller and the information collection and recording unit; the information collection and recording unit is used to collect and record the operating status information of the primary and secondary devices of the microgrid in real time through the communication channel; the alarm information push unit is used to send alarm information to the fault identification module and the remote management module when the operating status of the microgrid changes, and the alarm information includes the name of the device whose operating status has changed and its operating status information; the control execution unit is used to receive the control operation of the intelligent sequential control module, use the microgrid controller to operate switches and circuit breakers through the communication channel, adjust the working mode and operating parameters of the microgrid-related equipment, and return the execution operation result.

[0012] In combination with the first aspect, further, the fault judgment module includes a fault state judgment unit, a fault component identification unit and a judgment result push unit; wherein, the fault state judgment unit is used to judge whether a microgrid fault occurs according to the collected operating state information and the preset fault state information after receiving the alarm information; the fault component identification unit is used to locate the microgrid fault component according to the microgrid fault location method based on incomplete information when a fault occurs, and generate a fault judgment result; the judgment result push unit is used to send the microgrid state change information and the fault judgment result to the system analysis and decision module.

[0013] In combination with the first aspect, further, the operation steps of the microgrid fault location method based on incomplete information are as follows:

[0014] Obtain the terminal active power, reactive power and voltage amplitude information collected by the terminal inverter of the microgrid network;

[0015] Obtain branch active power, reactive power and voltage amplitude information collected by the measurement and control device in the microgrid network;

[0016] Perform microgrid state estimation calculation based on the above information;

[0017] Calculate the deviation between the running status information collected by each measuring point of the information collection module and the state estimation calculation result, and obtain the two measuring points with the largest deviation;

[0018] The fault area is located as the equipment between the two measuring points with the largest deviation.

[0019] In combination with the first aspect, further, a method for constructing a microgrid strategy table is:

[0020] According to the historical fault processing data of the microgrid, the mapping relationship between the source state, the destination state and the fault processing measures of the microgrid is obtained, and then the microgrid strategy table is generated;

[0021] Fault handling measures include operating mode switching, periodic parameter adjustment, battery maintenance, power supply restoration and fault isolation measures.

[0022] In combination with the first aspect, further, the system analysis and decision-making module obtains the source state of the microgrid according to the microgrid state change information and the fault judgment result, selects the destination state of the microgrid according to the principle of maximizing the power supply range, and selects matching fault handling measures from the microgrid strategy table according to the microgrid source state and the destination state.

[0023] In combination with the first aspect, further, in the intelligent sequential control module, when the operation execution result is abnormal, the abnormal information is fed back to the system analysis and decision module and the remote management module, and the system analysis and decision module is used to reselect the fault handling measures, or the remote management module is used to adjust the control operation of the intelligent sequential control module.

[0024] In combination with the first aspect, further, the remote management module includes a Web server unit and a front-end human-machine interface unit; wherein, the Web server unit is used to implement a standard data interface service function based on the SOA software architecture system, publish data in the form of a web service, and import external data into the system; the front-end human-machine interface unit is used to display the microgrid operating status and fault judgment results in the form of a web page on a remote operation and maintenance workstation, and at the same time remotely add and modify the microgrid strategy table and the operation steps of the intelligent sequential control module through the front-end human-machine interface.

[0025] In combination with the first aspect, further, the intelligent operation and maintenance control system also includes a message bus, which is used to realize information transmission between the information acquisition module, the fault identification module, the system analysis and decision module, the intelligent sequence control module and the remote management module.

[0026] In a second aspect, the present invention proposes an intelligent operation and maintenance control method based on the intelligent operation and maintenance control system of the first aspect, comprising the following steps:

[0027] Obtain the operating status information of primary and secondary equipment of microgrid in real time through communication channels;

[0028] When the operating status of the microgrid changes, an alarm message is generated;

[0029] Determine whether the microgrid has a fault based on the collected operating status information and alarm information. If a fault occurs, identify the microgrid fault component and generate a fault judgment result;

[0030] Select matching fault handling measures from a pre-built microgrid strategy table based on microgrid state change information and fault identification results;

[0031] Generate multiple steps of control operations that can be executed continuously according to the fault handling measures, send the control operations to the information acquisition module and obtain the operation execution results, where each step of the control operation includes the execution operation preconditions, execution operation content, and execution operation result verification;

[0032] According to the control operation, the microgrid controller is used to operate switches and switches through the communication channel, and the working mode and operating parameters of the microgrid related equipment are adjusted;

[0033] During the intelligent operation and maintenance control process, the microgrid operating status, microgrid strategy table and operation steps of the intelligent sequential control module are remotely managed.

[0034] The following advantages can be obtained by using the above technical means:

[0035] The present invention proposes an intelligent operation and maintenance control system and method for an unmanned microgrid. When the operating state of the microgrid changes, the faulty components can be automatically identified, and control operations for fault handling can be generated and executed, thereby autonomously and intelligently completing the operation and maintenance control operations of the microgrid, and realizing functions such as power supply restoration, fault isolation, automatic switching of operating modes and strategies, automatic battery maintenance, and remote management of the microgrid after a fault in an unmanned situation.

[0036] The system and method of the present invention have good openness and compatibility, and can be applied to various types of microgrids composed of different primary devices. In the case of unattended operation, the system can automatically determine the microgrid fault and perform corresponding fault processing, thereby improving the efficiency of microgrid fault processing, reducing the dependence of microgrid operation on operation and maintenance personnel, improving the operational stability of the microgrid, and expanding the social and economic benefits of the microgrid. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1Schematic diagram of the unattended microgrid system architecture and operation and maintenance control system in an embodiment of the present invention;

[0038] Figure 2 This is an architecture diagram of an intelligent operation and maintenance control system for an unattended microgrid according to the present invention;

[0039] Figure 3 This is a structural schematic diagram of an intelligent operation and maintenance control system for an unattended microgrid according to the present invention;

[0040] Figure 4 The present invention is a flowchart of the steps of an intelligent operation and maintenance control method for an unattended microgrid. DETAILED DESCRIPTION

[0041] The technical solution of the present invention is further described below in conjunction with the accompanying drawings:

[0042] Embodiment 1:

[0043] Figure 1 This is a typical unattended microgrid system architecture and operation and maintenance control system diagram. The microgrid includes photovoltaic, wind turbine, diesel generator, energy storage system and load. Each unit is connected through the AC bus and connected to the distribution network. The microgrid controller controls the internal switches of the microgrid through the secondary control cable. The microgrid intelligent operation and maintenance control system collects the status information of the meter, battery management system, energy storage converter, photovoltaic inverter, wind turbine controller, diesel generator controller and microgrid controller through the communication channel, and sends the operation and maintenance operation control instructions through the communication channel. The microgrid intelligent operation and maintenance control system is connected to the remote operation and maintenance workstation through Ethernet.

[0044] The present invention proposes an intelligent operation and maintenance control system for an unmanned microgrid, such as Figure 2 As shown in the figure, the design architecture of the system can be divided into hardware platform, operating system, support platform and application functions. The hardware layer is the hardware equipment of the system, which is mainly computer, with flexible hardware configuration, and can realize the scalability and maintainability of the system according to the specific scale of the microgrid; the operating system can adopt UNIX, Windows, Linux and other operating systems, and the software system has cross-platform characteristics and can be well compatible with multiple operating systems; the support platform is composed of a cross-platform graphics development platform, an object-oriented database management platform and a distributed network communication management platform, among which the distributed network communication is the communication message bus of the network and content of the entire microgrid system communication, mainly composed of industrial Ethernet, wireless network and RS485; the application function realizes the core functions of the microgrid intelligent operation and maintenance control system, including information collection, fault identification, system analysis and decision-making, intelligent sequential control and remote management.

[0045] In the embodiment of the present invention, Figure 3As shown, the intelligent operation and maintenance control system mainly includes an information acquisition module, a fault identification module, a system analysis and decision module, a remote management module and a message bus. The message bus is used to realize information transmission among the information acquisition module, the fault identification module, the system analysis and decision module, the intelligent sequential control module and the remote management module.

[0046] The information acquisition module includes a communication model configuration unit, an information acquisition and recording unit, an alarm information push unit and a control execution unit. Among them, the communication model configuration unit is used to configure the communication information model of the microgrid controller, and form a communication channel between the primary and secondary devices of the microgrid, the microgrid controller and the information acquisition and recording unit. The information acquisition and recording unit is used to collect and record the operating status information of the primary and secondary devices of the microgrid in real time through the communication channel. The alarm information push unit is used to send alarm information to the fault identification module and the remote management module when the operating status of the microgrid changes (including the generation of alarms, fault information, switch displacement, battery voltage exceeding the limit, battery SOC exceeding the limit, equipment abnormality, system shutdown, etc.). The alarm information includes the name of the device whose operating status has changed and its operating status information. The control execution unit is used to receive the control operation instructions of the intelligent sequential control module, and according to the instructions, use the microgrid controller through the communication channel to operate the switches and knife switches in the microgrid in real time, adjust the working mode and operating parameters of the microgrid-related equipment in real time, and return the execution operation results.

[0047] The fault discrimination module includes a fault state discrimination unit, a fault component identification unit and a discrimination result push unit. Among them, the fault state discrimination unit is used to determine whether the microgrid has a fault according to the collected operating state information and the preset fault state information after receiving the alarm information. For example, if the operating state of the microgrid changes to switch 1 disconnected, and the preset fault state information contains switch 1 disconnected, it means that the microgrid has a fault. The fault component identification unit is used to locate the microgrid fault component according to the microgrid fault location method based on incomplete information when a fault occurs, and generate a fault discrimination result. The discrimination result push unit is used to send the microgrid state change information and the fault discrimination result to the system analysis and decision module.

[0048] In the fault component identification unit, the operation steps of the microgrid fault location method based on incomplete information are as follows:

[0049] (1) Obtain the terminal active power, reactive power and voltage amplitude information collected by the terminal inverter of the microgrid network.

[0050] (2) Obtain branch active power, reactive power and voltage amplitude information collected by the measurement and control device in the microgrid network.

[0051] (3) Based on the above information (the information obtained in steps (1) and (2)), the microgrid state estimation calculation is performed. The specific operation of the state estimation calculation adopts the existing technology.

[0052] (4) Calculate the deviation between the operating status information collected by each measuring point of the information acquisition module (generally, one device is equipped with one measuring point) and the state estimation calculation result, and obtain the two measuring points with the largest deviation.

[0053] (5) Locate the fault area as the equipment between the two measuring points with the largest deviation.

[0054] The system analysis and decision module includes a microgrid strategy table unit, an expert rule system unit, a maintenance operation analysis unit, and a maintenance operation decision unit. Among them, the microgrid strategy table unit can obtain the mapping relationship between the microgrid source state, the destination state and the fault handling measures according to the microgrid historical fault handling data, and then generate and store the microgrid strategy table. In the embodiment of the present invention, the source state is the microgrid operating state before the control is implemented, and the destination state is some pre-set safe and optimized microgrid operating states. The fault handling error input fault handling measures in the microgrid strategy table include the operation mode and strategy automatic switching, periodic parameter adjustment, battery automatic maintenance, power supply recovery and fault isolation processing methods required after the system state changes or a fault occurs. The expert rule system unit obtains the source state of the microgrid according to the microgrid state change information and the fault discrimination result, and selects the microgrid destination state according to the principle of maximizing the power supply range, and then selects the matching fault handling measures from the microgrid strategy table according to the microgrid source state and the destination state. When the intelligent sequential control module fails to execute, the expert rule system unit needs to reselect the appropriate fault handling measures. The maintenance operation analysis unit is used to parse the fault handling error into the corresponding operation and maintenance operation logic steps. The maintenance operation decision unit is used to rehearse the operation and maintenance operation logic steps on the system simulation platform to judge the operation and maintenance operation; whether the logic steps are consistent with the current state of the system and whether the operation logic steps are feasible under the current state, and push the feasible operation and maintenance operation logic to the intelligent sequential control module.

[0055] The intelligent sequential control module is used to generate multiple steps of continuously executable control operations based on fault handling measures, send the control operations to the information acquisition module and obtain the operation execution results. Each step of the control operation includes the execution operation preconditions, execution operation content, and execution operation result verification.

[0056] The intelligent sequential control module includes an operation logic analysis unit, an operation logic execution unit, and a sequential control monitoring unit. Among them, the operation logic analysis unit analyzes and processes the operation and maintenance operation logic, and automatically generates multiple steps of continuously executable control operations according to the communication information model of the microgrid controller. The operation logic execution unit automatically loops to complete the precondition check, operation execution instruction sending, and operation execution result verification. During the automatic loop process, the operation logic execution unit continuously sends the control operation to the information acquisition module. The sequential control monitoring unit monitors the operation execution result. When the operation execution result is abnormal, the abnormal information is fed back to the system analysis and decision module and the remote management module, and the system analysis and decision module is used to reselect the fault handling measures, or the remote management module is used to adjust the control operation of the intelligent sequential control module.

[0057] The remote management module includes a Web server unit and a front-end human-machine interface unit. The Web server unit is used to implement the standard data interface service function based on the SOA software architecture system, publish data in the form of web services, and import external data into the system. The front-end human-machine interface unit is used to display the microgrid operating status and fault identification results in the form of web pages on the remote operation and maintenance workstation, and remotely add and modify the microgrid strategy table and the operation steps of the intelligent sequential control module through the front-end human-machine interface. During the intelligent operation and maintenance control process, the operation and maintenance personnel of the remote operation and maintenance workstation can monitor the system at any time and adjust the parameters, strategies, control instructions, etc. in the system to ensure the accuracy of the microgrid operation and maintenance control.

[0058] The intelligent operation and maintenance control system proposed in the present invention has good openness and compatibility, and can be applied to various types of microgrids composed of different primary equipment. In the case of unattended operation, the system can automatically determine the microgrid fault and perform corresponding fault processing, thereby improving the microgrid fault processing efficiency, reducing the dependence of microgrid operation on operation and maintenance personnel, improving the operation stability of the microgrid, and expanding the social and economic benefits of the microgrid.

[0059] Embodiment 2:

[0060] Based on the intelligent operation and maintenance control system in the first embodiment, the present invention proposes an intelligent operation and maintenance control method for an unattended microgrid, such as Figure 4 As shown, the specific steps include:

[0061] S1. Obtain the operating status information of primary and secondary equipment of the microgrid in real time through the communication channel.

[0062] S2. When the operating status of the microgrid changes (including alarm, fault information, switch position change, battery voltage exceeding the limit, battery SOC exceeding the limit, equipment abnormality, system shutdown, etc.), an alarm message is generated and sent to the fault identification module and the remote management module.

[0063] S3. Determine whether the microgrid has a fault based on the collected operating status information and alarm information. If a fault occurs, identify the microgrid fault component, generate a fault judgment result, and push the microgrid state change information and fault judgment result to the system analysis and decision module.

[0064] S4. Select matching fault handling measures from the pre-built microgrid strategy table according to the microgrid state change information and fault identification results. The fault handling measures include logical operation steps of operation and maintenance such as operation mode switching, periodic parameter adjustment, and battery maintenance.

[0065] S5. According to the fault handling measures, the microgrid controller communication information model is used to automatically generate multiple steps of control operations that can be executed continuously, and the control operations are sent to the information acquisition module and the operation execution results are obtained. Each step of the control operation includes the execution operation preconditions, execution operation content, and execution operation result verification.

[0066] S6. According to the control operation, the microgrid controller is used to operate the switch and the knife switch through the communication channel, and the working mode and operating parameters of the microgrid related equipment are adjusted. If the operation preconditions are not met or the operation fails during the sequential control execution, the process will return to step S4, reselect the fault handling measures, and repeat the steps S4 to S6 until the sequential control operation is successfully executed.

[0067] S7. During the intelligent operation and maintenance control process, remotely manage the microgrid operating status, microgrid strategy table and operating steps of the intelligent sequential control module.

[0068] The system and method of the present invention can autonomously and intelligently complete the operation and maintenance control operations of the microgrid, and realize functions such as power restoration after a fault of the microgrid, fault isolation, automatic switching of operation modes and strategies, automatic battery maintenance and remote management in an unmanned situation, thereby reducing the dependence of the microgrid operation on operation and maintenance personnel, improving the operational stability of the microgrid, and expanding the social and economic benefits of the microgrid.

[0069] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An intelligent operation and maintenance control system for an unattended microgrid, characterized in that: include: The information collection module is used to collect and record the operating status information of the primary and secondary equipment of the microgrid in real time through the communication channel. When the operating status of the microgrid changes, it sends alarm information to the fault identification module and the remote management module. On the other hand, it is used to receive and execute the control operations of the intelligent sequence control module; A fault identification module is used to determine whether a microgrid fault occurs based on the collected operating status information after receiving the alarm information. If a fault occurs, the fault component of the microgrid is identified, a fault identification result is generated, and the microgrid state change information and the fault identification result are sent to the system analysis and decision module; The system analysis and decision-making module is used to select matching fault handling measures from a pre-built microgrid strategy table according to the microgrid state change information and fault identification results; Intelligent sequential control module, used to generate multiple steps of control operations that can be executed continuously according to fault handling measures, send the control operations to the information acquisition module and obtain the operation execution results. Each step of the control operation includes the execution operation preconditions, execution operation content, and execution operation result verification; The remote management module is used to remotely manage the microgrid operating status, microgrid strategy table and operation steps of the intelligent sequential control module.

2. According to claim 1, the intelligent operation and maintenance control system of an unattended microgrid is characterized in that: The information acquisition module includes a communication model configuration unit, an information acquisition and recording unit, an alarm information push unit and a control execution unit; wherein the communication model configuration unit is used to configure the communication information model of the microgrid controller, and form a communication channel between the primary and secondary devices of the microgrid, the microgrid controller and the information acquisition and recording unit; the information acquisition and recording unit is used to collect and record the operating status information of the primary and secondary devices of the microgrid in real time through the communication channel; the alarm information push unit is used to send alarm information to the fault identification module and the remote management module when the operating status of the microgrid changes, and the alarm information includes the name of the device whose operating status has changed and its operating status information; the control execution unit is used to receive the control operation of the intelligent sequential control module, use the microgrid controller to operate switches and circuit breakers through the communication channel, adjust the working mode and operating parameters of the microgrid-related equipment, and return the execution operation result.

3. The intelligent operation and maintenance control system of an unattended microgrid according to claim 1 is characterized in that: The fault discrimination module includes a fault state discrimination unit, a fault component identification unit and a discrimination result push unit; wherein the fault state discrimination unit is used to determine whether a microgrid fault occurs according to the collected operating state information and the preset fault state information after receiving the alarm information; the fault component identification unit is used to locate the microgrid fault component according to the microgrid fault location method based on incomplete information when a fault occurs, and generate a fault discrimination result; the discrimination result push unit is used to send the microgrid state change information and the fault discrimination result to the system analysis and decision module.

4. The intelligent operation and maintenance control system of an unattended microgrid according to claim 3 is characterized in that: The operation steps of the microgrid fault location method based on incomplete information are as follows: Obtain the terminal active power, reactive power and voltage amplitude information collected by the terminal inverter of the microgrid network; Obtain branch active power, reactive power and voltage amplitude information collected by the measurement and control device in the microgrid network; Perform microgrid state estimation calculation based on the above information; Calculate the deviation between the running status information collected by each measuring point of the information collection module and the state estimation calculation result, and obtain the two measuring points with the largest deviation; The fault area is located as the equipment between the two measuring points with the largest deviation.

5. The intelligent operation and maintenance control system of an unattended microgrid according to claim 1 is characterized in that: The construction method of the microgrid strategy table is: According to the historical fault processing data of the microgrid, the mapping relationship between the source state, the destination state and the fault processing measures of the microgrid is obtained, and then the microgrid strategy table is generated; Fault handling measures include operating mode switching, periodic parameter adjustment, battery maintenance, power supply restoration and fault isolation measures.

6. An unattended microgrid intelligent operation and maintenance control system according to claim 1 or 5, characterized in that: The system analysis and decision-making module obtains the source state of the microgrid based on the microgrid state change information and fault judgment results, selects the destination state of the microgrid based on the principle of maximizing the power supply range, and selects matching fault handling measures from the microgrid strategy table based on the source state and destination state of the microgrid.

7. The intelligent operation and maintenance control system of an unattended microgrid according to claim 1 is characterized in that: In the intelligent sequential control module, when the operation execution result is abnormal, the abnormal information is fed back to the system analysis and decision module and the remote management module, and the system analysis and decision module is used to reselect the fault handling measures, or the remote management module is used to adjust the control operation of the intelligent sequential control module.

8. The intelligent operation and maintenance control system of an unattended microgrid according to claim 1, characterized in that: The remote management module includes a Web server unit and a front-end human-machine interface unit; wherein the Web server unit is used to implement the standard data interface service function based on the SOA software architecture system, publish data in the form of web service, and import external data into the system; the front-end human-machine interface unit is used to display the microgrid operating status and fault judgment results in the form of web pages on the remote operation and maintenance workstation, and at the same time remotely add and modify the microgrid strategy table and the operation steps of the intelligent sequential control module through the front-end human-machine interface.

9. The intelligent operation and maintenance control system of an unattended microgrid according to claim 1, characterized in that: The intelligent operation and maintenance control system also includes a message bus, which is used to realize information transmission among the information acquisition module, the fault identification module, the system analysis and decision module, the intelligent sequence control module and the remote management module.

10. An intelligent operation and maintenance control method based on the intelligent operation and maintenance control system according to any one of claims 1 to 9, characterized in that: The steps include: Obtain the operating status information of primary and secondary equipment of microgrid in real time through communication channels; When the operating status of the microgrid changes, an alarm message is generated; Determine whether the microgrid has a fault based on the collected operating status information and alarm information. If a fault occurs, identify the microgrid fault component and generate a fault judgment result; Select matching fault handling measures from a pre-built microgrid strategy table based on microgrid state change information and fault identification results; Generate multiple steps of control operations that can be executed continuously according to the fault handling measures, send the control operations to the information acquisition module and obtain the operation execution results, where each step of the control operation includes the execution operation preconditions, execution operation content, and execution operation result verification; According to the control operation, the microgrid controller is used to operate switches and switches through the communication channel, and the working mode and operating parameters of the microgrid related equipment are adjusted; During the intelligent operation and maintenance control process, the microgrid operating status, microgrid strategy table and operation steps of the intelligent sequential control module are remotely managed.

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