Micro-grid group distributed cooperative measurement and control protection system

Abstract

The invention discloses a micro-grid group distributed cooperative measurement and control protection system, which relates to the technical field of micro-grids and comprises a measurement and control point monitoring module, a measurement and control data uploading module, a cooperative protection module and an anomaly identification module. According to the distributed collaborative measurement and control protection system for the micro-grid group, a plan acquisition module, a fault generation module and a fault simulation module are arranged, fault types and fault contents of micro-grid group fault-prone equipment are collected and formulated according to historical fault cases, faults are simulated in a virtual micro-grid group model, and a solution plan is formulated; according to the method, a virtual micro-grid group model is established, a plan is input into the virtual micro-grid group model to simulate a fault solution process, the plan content is optimized and adjusted according to the simulation process, a solution plan is generated for the fault content, and simulation implementation can be performed on the fault solution plan in advance, so that the fault solution plan can be optimized, and the micro-grid can be well protected. The loss is reduced.

Description

Technical Field

[0001] The present invention relates to the field of microgrid technology, and in particular to a distributed collaborative measurement, control and protection system for a microgrid group. Background Art

[0002] With the gradual depletion of fossil energy and the increasing concern of human beings for environmental issues, clean renewable energy power generation has expanded rapidly, and a new round of energy transformation has been gradually promoted. After a large number of renewable energy sources are decentralized and connected to the distribution system, it will bring many risks and challenges to the safe, stable and economic operation of the power grid. In order to effectively manage the distributed power sources that are connected in an unordered manner, microgrid technology came into being. Microgrid technology aims to solve the grid connection problem of a large number of distributed power sources in various forms through the coordinated planning and management of local power grids, improve the flexibility and application efficiency of distributed power generation technology, and reduce the scheduling difficulty of system operators. Now, when protecting distributed equipment in the microgrid group, real-time information monitoring is required. After identifying the abnormality, the protection operation is performed according to the preset process. However, due to the huge architecture of the microgrid group, the manually set preset process cannot be simulated and implemented to verify and then optimize the solution effect, resulting in poor solution effect. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a distributed collaborative measurement, control and protection system for a microgrid group, which solves the problems raised in the above-mentioned background technology.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a distributed collaborative measurement and control protection system for a microgrid group, including a measurement and control point monitoring module, the measurement and control point monitoring module, a measurement and control data uploading module, a collaborative protection module, an abnormality identification module, a fault judgment module, a plan acquisition module, a protection implementation module, a fault generation module, a fault simulation module, a solution simulation module, a plan generation module, a plan storage module, a protection device status acquisition module, a device status analysis module, a maintenance record acquisition module, a protection device aging prediction module, a protection device status update module and a protection device maintenance module;

[0005] The monitoring module for measuring and controlling points is used to measure and control data of each sub-microgrid through the protection and measuring points set on each sub-microgrid in the microgrid group;

[0006] The measurement and control data uploading module is used to collect the measurement and control data and upload the measurement and control data to the collaborative protection module;

[0007] The collaborative protection module is used to analyze the measurement and control data after receiving the measurement and control data, and protect the microgrid equipment;

[0008] The abnormality identification module is used to analyze the measurement and control data and identify whether an abnormal fault occurs in the sub-microgrid;

[0009] The fault judgment module is used to judge the type and impact range of the abnormal fault when an abnormal fault is identified;

[0010] The plan acquisition module is used to select a corresponding solution plan for execution based on the abnormal fault information obtained through analysis;

[0011] The protection implementation module is used to protect the microgrid equipment by executing the emergency plan;

[0012] The fault generation module is used to collect and formulate the fault types and fault contents of the microgrid group's fault-prone equipment based on historical cases;

[0013] The fault simulation module is used to simulate the occurrence of faults in the virtual microgrid group model;

[0014] The solution simulation module is used to formulate a solution plan and input the plan into the virtual microgrid group model to simulate the fault resolution process;

[0015] The plan generation module is used to optimize and adjust the plan content according to the simulation process and generate a solution plan for the fault content;

[0016] The plan storage module is used to store the generated solution plan in the storage library.

[0017] Optionally, the protection device status acquisition module is used to acquire the status of the protection devices in each sub-microgrid in the microgrid group; the device status analysis module is used to analyze the status of the protection device; the maintenance record acquisition module is used to acquire the maintenance record of the protection device; the protection device aging prediction module is used to predict the aging fault condition of the protection device based on the status data of the protection device and the maintenance record of the protection device; the protection device status update module is used to update the status of each protection device in the system; the protection device maintenance module is used to adjust the maintenance plan of the protection device according to the aging fault condition of the protection device.

[0018] Optionally, the collaborative protection module can implement overcurrent protection, undervoltage protection, overvoltage protection, underfrequency protection, overfrequency protection, synchronous closing protection, and reverse power protection.

[0019] Optionally, the maintenance record acquisition module includes a maintenance feedback module and a record storage module. The maintenance feedback module is used to record the maintenance process and provide feedback on the equipment status after the maintenance of the protection equipment is completed; the record storage module is used to save and store each maintenance record.

[0020] Optionally, the protection equipment maintenance module includes a maintenance plan generation module, a maintenance execution module and a task assignment module. The maintenance plan generation module is used to generate a maintenance plan according to the status of the protection equipment; the maintenance execution module is used to maintain the protection equipment according to the maintenance plan; and the task assignment module is used to assign tasks to maintenance personnel according to the maintenance plan.

[0021] Optionally, the fault simulation module includes a microgrid group structure acquisition module and a simulated microgrid group construction module. The microgrid group structure acquisition module is used to acquire the architecture and structure data of the microgrid group; the simulated microgrid group construction module is used to build a virtual microgrid group model according to the microgrid group data information, and perform fault simulation plan resolution through the virtual microgrid group model.

[0022] Optionally, the virtual microgrid model constructed by the simulated microgrid construction module can not only be used for fault plan simulation, but also realize the visualization microgrid function. The virtual microgrid model can be used to map the status of the actual microgrid and display the equipment information status and operating status in the microgrid.

[0023] Optionally, the protection device status update module updates the protection device status information in the virtual microgrid model according to the protection device status analysis result.

[0024] The present invention provides a distributed collaborative measurement, control and protection system for a microgrid group, which has the following beneficial effects:

[0025] 1. The distributed collaborative measurement, control and protection system of the microgrid group is provided with a plan acquisition module, a fault generation module and a fault simulation module. According to the historical fault case collection and the fault type and fault content of the microgrid group's fault-prone equipment, the fault is simulated in the virtual microgrid group model, and a solution plan is formulated. The plan is input into the virtual microgrid group model to simulate the fault resolution process. According to the simulation process, the plan content is optimized and adjusted, and a solution plan is generated according to the fault content. The fault resolution plan can be simulated and implemented in advance, so that the fault resolution plan can be optimized, thereby better protecting the microgrid and reducing losses.

[0026] 2. The distributed collaborative measurement, control and protection system of the microgrid group is equipped with a protection device status acquisition module, a device status analysis module and a protection device aging prediction module to obtain the status of the protection devices in each sub-microgrid in the microgrid group, analyze the status of the protection devices, and predict the aging and failure of the protection devices according to the status data of the protection devices and the maintenance records of the protection devices. The maintenance plan of the protection devices is adjusted according to the predicted aging and failure of the protection devices, thereby ensuring the stable operation of the protection devices and thus ensuring the measurement, control and protection of the microgrid group. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the system structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of the maintenance record acquisition module of the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of the protection device maintenance module of the present invention;

[0030] Figure 4 It is a schematic diagram of the structure of the fault simulation module of the present invention.

[0031] In the figure: 1. Measurement and control point monitoring module; 2. Measurement and control data upload module; 3. Collaborative protection module; 4. Abnormal identification module; 5. Fault judgment module; 6. Plan acquisition module; 7. Protection implementation module; 8. Fault generation module; 9. Fault simulation module; 10. Solution simulation module; 11. Plan generation module; 12. Plan storage module; 13. Protection equipment status acquisition module; 14. Equipment status analysis module; 15. Maintenance record acquisition module; 16. Protection equipment aging prediction module; 17. Protection equipment status update module; 18. Protection equipment maintenance module; 19. Microgrid group structure acquisition module; 20. Simulation microgrid group construction module; 21. Maintenance feedback module; 22. Record storage module; 23. Maintenance plan generation module; 24. Maintenance execution module; 25. Task allocation module. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] See also Figures 1 to 4 The present invention provides a technical solution: a distributed collaborative measurement and control protection system for a microgrid group, including a measurement and control point monitoring module 1, a measurement and control data uploading module 2, a collaborative protection module 3, an abnormality identification module 4, a fault judgment module 5, a plan acquisition module 6, a protection implementation module 7, a fault generation module 8, a fault simulation module 9, a solution simulation module 10, a plan generation module 11, a plan storage module 12, a protection device status acquisition module 13, a device status analysis module 14, a maintenance record acquisition module 15, a protection device aging prediction module 16, a protection device status update module 17 and a protection device maintenance module 18;

[0034] The monitoring module 1 is used to monitor and control the data of each sub-microgrid through the protection monitoring points set on each sub-microgrid in the microgrid group;

[0035] The measurement and control data uploading module 2 is used to collect the measurement and control data and upload the measurement and control data to the collaborative protection module 3;

[0036] The collaborative protection module 3 is used to analyze the measurement and control data after receiving the measurement and control data and protect the microgrid equipment;

[0037] The abnormality identification module 4 is used to analyze the measurement and control data and identify whether an abnormal fault occurs in the sub-microgrid;

[0038] The fault judgment module 5 is used to judge the type and impact range of the abnormal fault when an abnormal fault is identified;

[0039] The plan acquisition module 6 is used to select a corresponding solution plan for execution based on the abnormal fault information obtained through analysis;

[0040] The protection implementation module 7 is used to protect the microgrid equipment by executing the emergency plan;

[0041] Fault generation module 8, used to collect and formulate fault types and fault contents of fault-prone equipment in microgrid groups according to historical cases;

[0042] A fault simulation module 9 is used to simulate the occurrence of faults in the virtual microgrid group model;

[0043] A solution simulation module 10 is used to formulate a solution plan and input the plan into the virtual microgrid group model to simulate the fault solution process;

[0044] The plan generation module 11 is used to optimize and adjust the plan content according to the simulation process and generate a solution plan for the fault content;

[0045] The plan storage module 12 is used to store the generated solution plan in a repository.

[0046] Furthermore, the protection device status acquisition module 13 is used to acquire the status of the protection devices in each sub-microgrid in the microgrid group; the device status analysis module 14 is used to analyze the status of the protection device; the maintenance record acquisition module 15 is used to acquire the maintenance record of the protection device; the protection device aging prediction module 16 is used to predict the aging fault condition of the protection device based on the status data of the protection device and the maintenance record of the protection device; the protection device status update module 17 is used to update the status of each protection device in the system; the protection device maintenance module 18 is used to adjust the maintenance plan of the protection device according to the aging fault condition of the protection device, so as to ensure the stability of the status of the protection device.

[0047] Furthermore, the collaborative protection module 3 can realize overcurrent protection, undervoltage protection, overvoltage protection, underfrequency protection, overfrequency protection, synchronous closing protection, and reverse power protection. The protection equipment includes circuit breakers and other equipment.

[0048] Furthermore, the maintenance record acquisition module 15 includes a maintenance feedback module 21 and a record storage module 22. The maintenance feedback module 21 is used to record the maintenance process and provide feedback on the equipment status after the maintenance of the protection equipment is completed; the record storage module 22 is used to save and store each maintenance record.

[0049] Furthermore, the protection equipment maintenance module 18 includes a maintenance plan generation module 23, a maintenance execution module 24 and a task assignment module 25. The maintenance plan generation module 23 is used to generate a maintenance plan according to the status of the protection equipment; the maintenance execution module 24 is used to maintain the protection equipment according to the maintenance plan; and the task assignment module 25 is used to assign tasks to maintenance personnel according to the maintenance plan.

[0050] Furthermore, the fault simulation module 9 includes a microgrid group structure acquisition module 19 and a simulated microgrid group construction module 20. The microgrid group structure acquisition module 19 is used to acquire the architecture and structure data of the microgrid group; the simulated microgrid group construction module 20 is used to build a virtual microgrid group model according to the microgrid group data information, and perform fault simulation plan resolution through the virtual microgrid group model.

[0051] Furthermore, the virtual microgrid group model built by the simulated microgrid group building module 20 can not only be used for fault plan simulation, but also can realize the visualization microgrid group function. The virtual microgrid group model can be used to map the status of the actual microgrid group and display the equipment information status and operating status in the microgrid group so as to control the microgrid group.

[0052] Furthermore, the protection device status update module 17 updates the protection device status information in the virtual microgrid model according to the protection device status analysis result, so that the protection device status in the microgrid is visualized.

[0053] In summary, when the distributed collaborative measurement and control protection system of the microgrid group is used, the fault type and fault content of the microgrid group's fault-prone equipment are collected and formulated according to historical cases, the fault is simulated in the virtual microgrid group model, a solution plan is formulated, and the plan is input into the virtual microgrid group model to simulate the fault resolution process. According to the simulation process, the plan content is optimized and adjusted, and a solution plan is generated for the fault content. According to the structure of the microgrid group, several protection measurement and control points are set in the microgrid group, and data measurement and control of each sub-microgrid is carried out through the protection measurement and control points. The measurement and control data is analyzed to identify whether there is an abnormal fault in the sub-microgrid. When an abnormal fault is identified, When an abnormal fault occurs, the type of abnormal fault and the scope of impact are judged. According to the abnormal fault information obtained through analysis, the corresponding solution plan is selected for execution, the protection equipment in each sub-microgrid in the microgrid group is monitored, the status of the protection equipment in each sub-microgrid in the microgrid group is obtained, and the status of the protection equipment is analyzed. According to the status data of the protection equipment and the maintenance record of the protection equipment, the aging failure of the protection equipment is predicted, and the maintenance plan of the protection equipment is adjusted according to the predicted aging failure of the protection equipment. The subsequent maintenance work of the protection equipment is carried out according to the adjusted maintenance plan.

[0054] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A distributed collaborative measurement, control and protection system for a microgrid group, comprising a measurement and control point monitoring module (1), characterized in that: The measurement and control point monitoring module (1), the measurement and control data uploading module (2), the collaborative protection module (3), the abnormality identification module (4), the fault judgment module (5), the plan acquisition module (6), the protection implementation module (7), the fault generation module (8), the fault simulation module (9), the solution simulation module (10), the plan generation module (11), the plan storage module (12), the protection device status acquisition module (13), the device status analysis module (14), the maintenance record acquisition module (15), the protection device aging prediction module (16), the protection device status update module (17) and the protection device maintenance module (18); The measurement and control point monitoring module (1) is used to perform data measurement and control on each sub-microgrid through the protection measurement and control points set on each sub-microgrid in the microgrid group; The measurement and control data uploading module (2) is used to collect the measurement and control data and upload the measurement and control data to the collaborative protection module (3); The collaborative protection module (3) is used to analyze the measurement and control data after receiving the measurement and control data, and protect the microgrid equipment; The abnormality identification module (4) is used to analyze the measurement and control data and identify whether an abnormal fault occurs in the sub-microgrid; The fault judgment module (5) is used to judge the type and impact range of the abnormal fault when an abnormal fault is identified; The plan acquisition module (6) is used to select a corresponding solution plan for execution based on the abnormal fault information obtained through analysis; The protection implementation module (7) is used to protect the microgrid equipment by executing the emergency plan; The fault generation module (8) is used to collect and formulate the fault types and fault contents of the fault-prone equipment in the microgrid group according to historical cases; The fault simulation module (9) is used to simulate the occurrence of faults in the virtual microgrid model; The solution simulation module (10) is used to formulate a solution plan and input the plan into the virtual microgrid group model to simulate the fault solution process; The plan generation module (11) is used to optimize and adjust the plan content according to the simulation process, and generate a solution plan for the fault content; The plan storage module (12) is used to store the generated solution plan in a storage repository.

2. According to claim 1, a distributed collaborative measurement, control and protection system for microgrids is characterized by: The protection device status acquisition module (13) is used to acquire the status of the protection devices in each sub-microgrid in the microgrid group; the device status analysis module (14) is used to analyze the status of the protection devices; the maintenance record acquisition module (15) is used to acquire the maintenance records of the protection devices; the protection device aging prediction module (16) is used to predict the aging fault of the protection devices based on the status data of the protection devices and the maintenance records of the protection devices; the protection device status update module (17) is used to update the status of each protection device in the system; The protection device maintenance module (18) is used to adjust the maintenance plan of the protection device according to the aging fault conditions of the protection device.

3. According to claim 1, a distributed collaborative measurement, control and protection system for microgrids is characterized by: The collaborative protection module (3) can realize overcurrent protection, undervoltage protection, overvoltage protection, underfrequency protection, overfrequency protection, synchronous closing protection, and reverse power protection.

4. According to claim 1, a distributed collaborative measurement, control and protection system for microgrids is characterized by: The maintenance record acquisition module (15) comprises a maintenance feedback module (21) and a record storage module (22), wherein the maintenance feedback module (21) is used to record the maintenance process and provide feedback on the device status after the maintenance of the protection device is completed; and the record storage module (22) is used to save and store each maintenance record.

5. According to claim 1, a distributed collaborative measurement, control and protection system for microgrids is characterized by: The protection equipment maintenance module (18) comprises a maintenance plan generation module (23), a maintenance execution module (24) and a task allocation module (25), wherein the maintenance plan generation module (23) is used to generate a maintenance plan according to the status of the protection equipment; the maintenance execution module (24) is used to perform maintenance on the protection equipment according to the maintenance plan; and the task allocation module (25) is used to allocate tasks to maintenance personnel according to the maintenance plan.

6. A microgrid distributed collaborative measurement, control and protection system according to claim 1, characterized in that: The fault simulation module (9) comprises a microgrid group structure acquisition module (19) and a simulated microgrid group construction module (20), wherein the microgrid group structure acquisition module (19) is used to acquire the architecture and structure data of the microgrid group; and the simulated microgrid group construction module (20) is used to build a virtual microgrid group model according to the microgrid group data information, and perform fault simulation plan resolution through the virtual microgrid group model.

7. A microgrid distributed collaborative measurement, control and protection system according to claim 6, characterized in that: The virtual microgrid group model constructed by the simulated microgrid group construction module (20) can not only be used for fault plan simulation, but also realize the visualization of microgrid group functions. The virtual microgrid group model can be used to map the status of the actual microgrid group and display the information status and operation status of the equipment in the microgrid group.

8. The microgrid distributed collaborative measurement, control and protection system according to claim 1 is characterized by: The protection device status update module (17) updates the protection device status information in the virtual microgrid model according to the protection device status analysis result.

Images