Online simulation and display method and system for black-start recovery scheme of power grid

Abstract

The invention provides an online simulation and display method and system for a black-start recovery scheme of a power grid. The method comprises the following steps: identifying the running state of main equipment of the power grid; coloring the state of power grid equipment based on a GIS map network frame; reconstructing a black start recovery model; generating black start recovery process information; and the black-start recovery process is visualized based on the GIS map. The technical problem that the black start scheme display and management are not visual enough and the effectiveness of the black start of the power grid is restricted is solved.

Description

Technical Field

[0001] The present invention relates to the field of power grid safety and emergency control, and in particular to an online simulation and display method and system for a power grid black start recovery scheme. Background Art

[0002] At present, my country's power grid has two obvious characteristics: ultra-high voltage cross-regional power transmission and a high proportion of new energy. The power grid structure and operation form have become more complex. At the same time, affected by natural disasters and external forces, the risk of large-scale power outages in the power grid is also increasing year by year. State Grid Corporation pointed out: We must deeply understand the situation and challenges facing the safe and stable work of the power system, enhance our awareness of potential dangers, and strengthen our bottom-line thinking. Ensuring the safety and stability of the power system is the top priority for preventing large-scale power outages and ensuring power safety.

[0003] A black start of a power grid refers to starting the units with self-starting capability to drive the units without self-starting capability after a system has completely stopped operating due to a fault, gradually expanding the power supply range of the system and eventually achieving the recovery of the entire system. In the case of a large-scale or full-network power outage, if there is no black start measure, the power outage time will be greatly extended, causing significant economic losses and serious social impacts.

[0004] At present, most power grid companies prepare black start plans for power grids in the form of reports. In actual power grids, the equipment itself does not meet the start-up conditions due to maintenance or failure, but this is not fully considered in the preparation of black start plans, and the black start plans lack intuitive management methods in actual combat. Therefore, in order to more effectively play the role of black start plans, it is necessary to combine power grid maintenance and faulty equipment to make the evolution process of power grid black start recovery plans online and visualized, so that power grid analysts can intuitively see the recovery process of power grid black start.

[0005] The existing invention patent application document "Black start path generation and system recovery decision system based on 3D visualization technology" with publication number CN112416344A, the existing method includes: the decision system includes a graphical interface module, a database and an algorithm function library; the graphical interface module includes a graphical configuration software system and a 3D graphics system, which are used to generate a plant diagram, a grid plan diagram and a grid diagram with a 3D actual geographical background of the power system; the database can import power system data in BPA and CIM-E formats through a data conversion interface, and the power system data includes component parameters and corresponding calculation results; the algorithm function library includes black start plans and numerical analysis during system recovery. This invention patent solves the generation and display of black start plans for power grids under offline power data. Compared with the invention patent of this application, it does not solve the generation of black start plan paths under real-time online power grids, and does not consider actual situations such as power grid maintenance and equipment failures. This patent focuses on solving the online simulation and visualization of the evolution process of black start recovery plans, and improves the practical level of black start recovery plans.

[0006] The existing invention patent application document "A black start decision-making assistance system based on DTS" with publication number CN105515044A, the existing system includes: including a graphics platform, a database and an algorithm analysis library, the graphics platform is composed of a screen browser of the smart grid dispatching technical support system and a self-developed window; the database saves the parameters of each component in the power system and the analysis results, which is convenient for users to modify and view; the algorithm analysis library includes all the numerical analysis algorithms and optimization algorithms needed in the black start process, which is the technical core of the entire system; it is characterized by: the system adopts a modular hierarchical structure, consisting of a data layer, an application layer, an application support layer, an interface layer and a user layer. The solution provided by this invention patent is a black start decision-making assistance system, focusing on black start simulation and the algorithm itself, which are common practices in power systems, and the system provided by the patent is combined with the DTS of the D5000 intelligent dispatching support system, the display technology is old, the graphic display is not intuitive, and the practicality is poor. Compared with the invention patent of this application, the problem of the lack of intuitive display and management of the black start solution is not solved.

[0007] The existing public document "Research on the Development of Visual Black Start Decision Support Software" contains functions such as network topology analysis, black start decision plan formation and simulation, power flow calculation, calculation of various network parameters and technical indicators when the network is restored, and storage and update of parameters of various components in the network. The system mainly consists of several parts such as a general visual interface module, a black start expert system, a calculation module, and a database module. The visual interface is the most important module of the system, which mainly consists of a graphical interface and a user interface and its management. The user interface provides a good user operating environment and realizes most of the operations of human-computer interaction, including inputting parameters, giving calculation conditions, querying calculation results, and selecting expert system solutions. The solution given in this article is a set of visual black start decision support software, focusing on black start simulation and the algorithm itself, which are common practices in power systems. In addition, the SVG display technology given in the patent is old and not intuitive in graphic display. It is suitable for small and medium-sized power grids such as prefecture-level cities, and cannot be clear and smooth when facing provincial power grid scale display. Compared with the invention patent of this application, the problem of not being intuitive enough in the display and management of black start solutions is not solved.

[0008] In summary, the existing technology has the technical problem that the display and management of black start schemes are not intuitive enough, which restricts the effectiveness of black start of power grids. Summary of the invention

[0009] The technical problem to be solved by the present invention is: how to solve the technical problem that the display and management of black start schemes in the prior art are not intuitive enough, which restricts the effectiveness of black start of power grids.

[0010] The present invention adopts the following technical solutions to solve the above technical problems: A method for online simulation and display of a power grid black start recovery solution comprises:

[0011] S1. Obtain measurement data to identify the operating status of the main equipment of the power grid;

[0012] S2. Obtain and color the state of the main equipment of the power grid according to the primary main equipment of the power grid and the corresponding geographic spatial data, combined with the mapping relationship with the main equipment of the power grid, according to the operation status of the equipment, based on the pre-set GIS map power grid framework;

[0013] S3. According to the power grid equipment status and equipment measurement data, the original static black start model is modified to reconstruct the basic model of black start recovery simulation and eliminate unavailable equipment;

[0014] S4, generating black start recovery process information, wherein the reconstructed black start recovery model, the set of unavailable equipment and the starting power supply are used as input parameter data, the starting power supply is used as the starting time node, the black start recovery process information is generated by integrating and calling the existing black start recovery algorithm program, and the starting substation, line information and the started load and power generation information in the recovery process information are extracted in rounds according to the order of the recovery period;

[0015] S5. Based on the GIS map and the black start recovery process information, perform black start recovery process visualization.

[0016] The present invention proposes a GIS-based online simulation and display method for a power grid black start recovery plan, which uses power grid operation data to automatically identify the operation status of power grid equipment, and uses GIS map display technology, combined with the power grid geographic grid, and integrated with the black start recovery process information to achieve online simulation and visualization of the black start recovery plan evolution process, so as to improve the practical level of the black start recovery plan.

[0017] In a more specific technical solution, S1 includes:

[0018] S11. Obtaining measurement data from the primary equipment information of the power grid from the power dispatching automation system;

[0019] S12. Taking the equipment interval as a unit, establish the relationship between the main equipment of the power grid and the switches, switches, and grounding switches in the interval;

[0020] S13. Obtain all measurement data of the main power grid equipment within the equipment interval, and use them to identify and obtain the equipment operation status.

[0021] In a more specific technical solution, the primary power grid equipment information in S21 includes: primary power grid equipment inventory, primary power grid equipment topology, and primary power grid equipment measurement data.

[0022] In a more specific technical solution, the main equipment of the power grid includes: lines, transformers, and busbars.

[0023] In a more specific technical solution, the status of the main equipment of the power grid includes: operating state, hot standby, cold standby and maintenance state.

[0024] In a more specific technical solution, S2 includes:

[0025] S21. Obtain the primary main equipment of the power grid and the corresponding geographic spatial data from the dedicated GIS platform within the power system;

[0026] S22. Based on the primary main equipment of the power grid and the corresponding geographic spatial data, relying on the interconnection control and approval process of the internal production and dispatching equipment ledger of the power system, establish a mapping relationship between the main equipment of the power grid in the power dispatching automation system and the primary main equipment in the GIS platform;

[0027] S23. According to the operating status of the equipment, based on the preset GIS map power grid, the status of the power grid lines, busbars, transformers and corresponding substations and power plants are displayed in different colors.

[0028] The GIS-based online simulation and display method for power grid black start recovery plan proposed in the present invention solves the defect that the power grid black start recovery process cannot be intuitively displayed and simulated online compared with the existing technology, changes the working mode of preparing the black start plan once a year, incorporates power grid maintenance and faulty equipment into black start simulation, and raises the power grid black start work to a practical level, so as to improve the safety and stability level of the power grid under the new power system.

[0029] In a more specific technical solution, the primary main equipment of the power grid and the corresponding geospatial data: power plants, substations, lines, transformers and busbars.

[0030] In more specific technical solutions, S3 includes:

[0031] S31, according to the power grid equipment status and equipment measurement data, process and obtain the current power grid operation status data;

[0032] S32, according to the current grid operation data, the grid equipment status and load and output data in the original black start model are corrected to obtain a reconstructed black start recovery model;

[0033] S33. Mark the main power grid equipment that has failed or is in a maintenance state to form a set of unavailable equipment. When performing black start simulation analysis, remove the unavailable equipment.

[0034] In a more specific technical solution, S5 includes:

[0035] S51, dividing the interval time of each round according to the black start recovery process information, the total number of startup rounds, and the startup process tracking and display requirements;

[0036] S52, based on the GIS map, lighting up and coloring substations and lines on the GIS map one by one according to the sequence of restoration periods and time intervals;

[0037] S53. Synchronously display the startup details list, startup load and power generation information in a table format.

[0038] In a more specific technical solution, an online simulation and display system for a power grid black start recovery solution includes:

[0039] The equipment operation status identification module is used to obtain measurement data and identify the operation status of the main equipment of the power grid;

[0040] The state coloring module is used to obtain and establish a mapping relationship based on the primary main equipment of the power grid and the corresponding geographic space data, and to perform state coloring operations on the main equipment of the power grid based on the preset GIS map power grid frame according to the equipment operation status. The state coloring module is connected to the equipment operation status identification module;

[0041] A black start model construction and correction module is used to correct the original black start model according to the power grid equipment status and equipment measurement data to obtain a reconstructed black start recovery model and eliminate unavailable equipment. The black start model construction and correction module is connected to the status coloring module and the equipment operation status identification module;

[0042] A black start information acquisition module is used to generate black start recovery process information, wherein the reconstructed black start recovery model, the set of unavailable equipment and the starting power supply are used as input parameter data, the starting power supply is used as the starting time node, and the black start recovery process information is generated by integrating the black start recovery algorithm. The starting substation, line information and the started load and power generation information in the recovery process information are extracted in rounds according to the order of the recovery period. The black start information acquisition module is connected to the black start model construction and correction module;

[0043] The recovery visualization module is used to perform black start recovery process visualization based on the GIS map and according to the black start recovery process information. The recovery visualization module is connected with the black start information acquisition module.

[0044] Compared with the prior art, the present invention has the following advantages:

[0045] The present invention proposes a GIS-based online simulation and display method for a power grid black start recovery plan, which uses power grid operation data to automatically identify the operation status of power grid equipment, and uses GIS map display technology, combined with the power grid geographic grid, and integrated with the black start recovery process information to achieve online simulation and visualization of the black start recovery plan evolution process, so as to improve the practical level of the black start recovery plan.

[0046] The GIS-based online simulation and display method for power grid black start recovery plan proposed in the present invention solves the defect that the power grid black start recovery process cannot be intuitively displayed and simulated online compared with the existing technology, changes the working mode of preparing the black start plan once a year, incorporates power grid maintenance and faulty equipment into black start simulation, and raises the power grid black start work to a practical level, so as to improve the safety and stability level of the power grid under the new power system.

[0047] The present invention solves the technical problem in the prior art that the display and management of black start schemes are not intuitive enough, which restricts the effectiveness of black start of power grids. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 A schematic diagram of basic steps of an online simulation and display method for a power grid black start recovery solution according to Embodiment 1 of the present invention;

[0049] Figure 2 This is a schematic diagram of equipment spacing in Example 2 of the present invention;

[0050] Figure 3 This is a coloring effect diagram of the power grid equipment status according to Embodiment 2 of the present invention;

[0051] Figure 4 This is a diagram showing the effect of black start recovery process information generation in Example 2 of the present invention;

[0052] Figure 5 A schematic diagram of a substation and a line is shown on a GIS map according to Embodiment 2 of the present invention;

[0053] Figure 6 This is a schematic diagram of the startup detailed list and startup load and power generation information interface of Example 2 of the present invention. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] Example 1

[0056] like Figure 1 As shown, the present invention provides an online simulation and display method for a power grid black start recovery solution, comprising the following basic steps:

[0057] S1, Identification of the operating status of the main equipment of the power grid;

[0058] In this embodiment, the ledger, topology and measurement data of the primary equipment of the power grid are obtained from the power dispatching automation system, and the relationship between the main equipment such as the line, transformer, busbar and the switch, knife switch and grounding knife switch in the interval is constructed based on the equipment interval. The equipment operation status is determined through the measurement data of all equipment in the main equipment interval, and the main equipment status of the power grid is recognized;

[0059] In this embodiment, the aforementioned power grid master equipment status includes but is not limited to: operation status, hot standby status, cold standby status and maintenance status;

[0060] In this embodiment, when the main equipment of the power grid is in operation, the switches and circuit breakers in the main equipment compartment are in a closed state, and the grounding switch is in a disconnected state;

[0061] In this embodiment, when the main equipment of the power grid is in hot standby state, the knife switch in the main equipment interval is in a closed state, and the circuit breaker and the grounding knife switch are in an open state;

[0062] In this embodiment, when the main equipment of the power grid is in the cold standby state, the switch, circuit breaker and grounding switch in the main equipment compartment are in the disconnected state;

[0063] In this embodiment, when the main equipment of the power grid is in the maintenance state, the switches and circuit breakers in the main equipment compartment are in the disconnected state, and the grounding switches are in the closed state. At the same time, according to the power grid fault analysis and maintenance plan data, the equipment in the fault or maintenance state is further distinguished and calibrated;

[0064] S2, coloring of power grid equipment status based on GIS map grid;

[0065] In this embodiment, the primary main equipment of the power grid and the corresponding geographic spatial data are obtained from the dedicated GIS platform within the power system, and a mapping relationship is established with the main equipment in the dispatching automation system identified in the aforementioned step S1. According to the operating status of the equipment identified in the aforementioned step S1, the status of the power grid lines, busbars, transformers, and corresponding substations and power plants are displayed in different colors based on the GIS map power grid framework;

[0066] In this embodiment, the aforementioned primary main equipment of the power grid and the corresponding geographic spatial data include but are not limited to: power plants, substations, lines, transformers and busbars;

[0067] S3, reconstruct the black start recovery model;

[0068] In this embodiment, based on the identification of the power grid equipment status and equipment measurement data in the aforementioned step S1, the power grid equipment status and load and output data in the black start model are corrected to obtain a black start recovery model that is completely consistent with the current power grid operation status. At the same time, the equipment that has failed or is under maintenance is marked to form a set of unavailable equipment, and such equipment is eliminated when conducting black start simulation analysis.

[0069] S4, black start recovery process information generation;

[0070] In this embodiment, based on the aforementioned step S3, the reconstructed black start calculation model, the unavailable equipment set and the starting power supply are used as input parameters, and starting from the starting power supply, the black start recovery process information is automatically generated by integrating the black start recovery algorithm, and the starting substation (busbar and transformer), line information and the started load and power generation information in the recovery process information are extracted in rounds according to the sequence of the recovery time periods.

[0071] S5. Visualization of black start recovery process based on GIS map.

[0072] In this embodiment, according to the black start recovery information formed in the aforementioned step S4, the interval time of each round is divided according to the total number of startup rounds and the requirement of tracking and displaying the startup process within 1 minute. Based on the GIS map, the substations and lines are lighted and colored on the GIS map one by one according to the recovery sequence and time interval. At the same time, the startup detailed list and the startup load and power generation information are synchronously displayed in a tabular form, thereby realizing a visual display of the black start recovery process.

[0073] Example 2

[0074] like Figure 2 As shown, in the process of identifying the operating status of the main equipment of the power grid in this embodiment, the equipment interval refers to Figure 2 : Within the 2V60 line interval: 2V60 line (measured value: -30MW), 2V60 circuit breaker (measured value: closed), 2V601 knife switch (measured value: disconnected), 2V602 knife switch (measured value: closed), 2V603 knife switch (measured value: closed), 2V600 grounding knife switch (measured value: disconnected), 2V6030 grounding knife switch (measured value: disconnected), 2V6020 grounding knife switch (measured value: disconnected).

[0075] The status of the 2V60 line is: running.

[0076] The power grid equipment status coloring effect based on the GIS map grid of this embodiment can be seen in Figure 3 : Different colors are used to distinguish different voltage levels of power grid equipment and status, where red is 500 kV power grid equipment, purple is 220 kV power grid equipment, green is 110 kV power grid equipment, yellow is 35 kV power grid equipment, gray is out of service power grid equipment, and gray and dotted lines are unavailable equipment; the black start recovery process information generation effect of this embodiment can be seen in Figure 4 :Including restoration period, restoration substation (busbar and transformer), restoration line information, etc.; visualization of black start restoration process based on GIS map, see Figure 5:The overall power grid is initially displayed in gray. According to the recovery period and the recovery plant and line information, the power grid is gradually measured to present the black start process in a visual way; the startup detailed list and startup load and power generation information interface are shown in Figure 6 :According to the recovery period and the recovery plant, combined with the original black start simulation model, the load and power generation information are automatically counted, and the startup detailed list and statistical information are gradually displayed in the order of recovery, and the power generation load situation during the black start process is dynamically observed.

[0077] In summary, the present invention proposes an online simulation and display method for a black start recovery plan of a power grid based on GIS, which uses the power grid operation data to automatically identify the operation status of power grid equipment, and uses GIS map display technology, combined with the power grid geographic grid structure, and integrated with the black start recovery process information to achieve online simulation and visualization of the evolution process of the black start recovery plan, so as to improve the practical level of the black start recovery plan.

[0078] The GIS-based online simulation and display method for power grid black start recovery plan proposed in the present invention solves the defect that the power grid black start recovery process cannot be intuitively displayed and simulated online compared with the existing technology, changes the working mode of preparing the black start plan once a year, incorporates power grid maintenance and faulty equipment into black start simulation, and raises the power grid black start work to a practical level, so as to improve the safety and stability level of the power grid under the new power system.

[0079] The present invention solves the technical problem in the prior art that the display and management of black start schemes are not intuitive enough, which restricts the effectiveness of black start of power grids.

[0080] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for online simulation and display of a power grid black start recovery scheme, characterized in that: The method comprises: S1. Obtain measurement data to identify the operating status of the main equipment of the power grid; S2, obtaining and establishing a mapping relationship based on the primary main equipment of the power grid and the corresponding geographic spatial data, and performing a state coloring operation on the main equipment of the power grid according to the operating status of the equipment and the power grid framework of the preset GIS map; S3, according to the power grid equipment status and the equipment measurement data, the original black start model is modified to reconstruct a basic model for black start recovery simulation, and unavailable equipment is eliminated; S4, generating black start recovery process information, wherein the reconstructed black start recovery model, the set of unavailable devices and the starting power supply are used as input parameter data, the starting power supply is used as the starting time node, and the black start recovery process information is generated by integrating the black start recovery algorithm, and the starting substation, line information and the started load and power generation information in the recovery process information are extracted in rounds according to the order of the recovery period; S5. Based on the GIS map and according to the black start recovery process information, perform black start recovery process visualization.

2. The method for online simulation and display of a power grid black start recovery scheme according to claim 1, characterized in that: The S1 includes: S11, acquiring the measurement data in the primary equipment information of the power grid from the power dispatching automation system; S12, taking the equipment interval as a unit, establishing the relationship between the main power grid equipment and the switches, switches, and grounding switches in the interval; S13, obtaining all the measurement data of the main equipment of the power grid within the equipment interval, and identifying and obtaining the operating status of the equipment based on the data.

3. The online simulation and display method of a power grid black start recovery scheme according to claim 2 is characterized in that: The power grid primary equipment information in S21 includes: power grid primary equipment ledger, power grid primary equipment topology, and power grid primary equipment measurement data.

4. The online simulation and display method of a power grid black start recovery scheme according to claim 1 is characterized in that: The main equipment of the power grid includes: lines, transformers, and busbars.

5. The online simulation and display method of a power grid black start recovery scheme according to claim 1 is characterized in that: The states of the main equipment of the power grid include: operating state, hot standby, cold standby and maintenance state.

6. A method for online simulation and display of a power grid black start recovery scheme according to claim 1, characterized in that: The S2 includes: S21. Obtaining the primary main equipment of the power grid and corresponding geographic spatial data from a dedicated GIS platform within the power system; S22, establishing the mapping relationship with the power grid master device according to the power grid primary master device and the corresponding geographic space data; S23. According to the operating status of the equipment, based on the preset GIS map power grid, the status of the power grid lines, busbars, transformers and corresponding substations and power plants are displayed in different colors.

7. A method for online simulation and display of a power grid black start recovery scheme according to claim 1, characterized in that: The primary main equipment of the power grid and the corresponding geospatial data: power plants, substations, lines, transformers and busbars.

8. The method for online simulation and display of a power grid black start recovery scheme according to claim 1, characterized in that: The S3 includes: S31, processing and obtaining current grid operation status data according to the grid equipment status and the equipment measurement data; S32, according to the current grid operation data, modifying the grid equipment status and load and output data in the original black start model to obtain the reconstructed black start recovery model; S33, marking the main power grid equipment that has failed and is in a maintenance state to form a set of unavailable equipment, and removing the unavailable equipment when performing black start simulation analysis.

9. The method for online simulation and display of a power grid black start recovery scheme according to claim 1, characterized in that: The S5 includes: S51, dividing the interval time of each round according to the black start recovery process information, the total number of startup rounds and the startup process tracking and display requirements; S52, based on the GIS map, lighting up the colored substations and lines on the GIS map one by one according to the restoration period sequence and time interval; S53. Synchronously display the startup details list, startup load and power generation information in a table format.

10. An online simulation and display system for a power grid black start recovery scheme, characterized in that: The system comprises: The equipment operation status identification module is used to obtain measurement data and identify the operation status of the main equipment of the power grid; A status coloring module is used to obtain and establish a mapping relationship based on the primary main equipment of the power grid and the corresponding geographic spatial data, and to perform a status coloring operation on the main equipment of the power grid based on the preset GIS map power grid frame according to the operating status of the equipment. The status coloring module is connected to the equipment operating status identification module; A black start model construction and correction module is used to correct the original black start model according to the power grid equipment state and the equipment measurement data to obtain a reconstructed black start recovery model and eliminate unavailable equipment. The black start model construction and correction module is connected to the state coloring module and the equipment operation state identification module; A black start information acquisition module is used to generate black start recovery process information, wherein the reconstructed black start recovery model, the set of unavailable devices and the starting power supply are used as input parameter data, the starting power supply is used as the starting time node, and the black start recovery process information is generated by integrating a black start recovery algorithm, and the starting substation, line information and started load and power generation information in the recovery process information are extracted in rounds according to the order of the recovery period, and the black start information acquisition module is connected to the black start model construction and correction module; A recovery visualization module is used to perform black start recovery process visualization based on a GIS map and according to the black start recovery process information. The recovery visualization module is connected to the black start information acquisition module.

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