Power grid unified model design method and system

Abstract

The invention discloses a power grid unified model design method and system. The method comprises the following steps: synchronizing a CIM / E file mode model; carrying out ETL mode model synchronization; a cloud synchronization mode is regulated and controlled, wherein the cloud synchronization mode comprises stock model synchronization and incremental model automatic synchronization; the system comprises a unified model structure design module and a unified model structure synchronization module. The unified model structure design module comprises an ID coding module and a structured object design module; and the unified model structure synchronization module comprises a content synchronization module and a mode synchronization module. According to the method, the consistency, the integrity and the real-time performance of model data between the regional distribution autonomous station and the provincial real-time analysis engine are ensured, and the operation efficiency and the safety of a power system are improved; unified management of the whole network model data can be realized, a transparent access mechanism is provided, and the use requirements of different applications on the model data are met.

Description

Technical Field

[0001] The present invention relates to the field of power system information technology, and in particular to a power grid unified model design method and system based on big data analysis, data processing and cloud computing. Background Art

[0002] The development of new energy is carried out in both centralized and distributed ways. The breadth and depth of electric energy substitution are constantly expanding, and the power load continues to grow, showing a trend of more complex structure, more numerous equipment, and more complex technology. In addition, digital transformation has become the only way for economic and social development. In the field of power grids, through the integration of physical and virtual power grids, the advantages of digital twin technology are used to perceive, simulate, predict and optimize physical power grids, which will effectively promote the digital transformation of power grids and support the construction of new power systems. The model is the core of the transformation of physical power grids into digital power grids. Due to decentralized management, it is difficult to coordinate the coordination of main and distribution, and difficult to share cross-professional data. It is urgent to unify the model, coordinate the whole process of "source, network, load, storage", and the whole dimension of "resources, assets, measurement, location, business, environment", realize the integration of main and distribution, and meet the application needs of multiple disciplines such as power grid planning, design, construction, dispatching, equipment, marketing, and finance for the model, and form a unified enterprise-level model standard for the entire distribution network. Summary of the invention

[0003] Purpose of the invention: The purpose of the present invention is to provide a method and system for designing a unified power grid model based on big data analysis, data processing and cloud computing.

[0004] Technical solution: The unified power grid model design method of the present invention comprises the following steps:

[0005] (1) CIM / E file model synchronization;

[0006] (2) ETL model synchronization;

[0007] (3) Adjust the cloud synchronization mode, including synchronization of existing models and automatic synchronization of incremental models.

[0008] Furthermore, the step (1) comprises the following steps:

[0009] (1.1) In areas where the new generation control system is not in operation, the distribution automation system uses the model export tool to export the stock model data into CIM / E files according to the format specifications. The CIM / E files contain key information such as regional information, internal ID, PMS resource ID, PMS asset ID, and equipment type;

[0010] (1.2) Forward the exported CIM / E files to the provincial level four districts;

[0011] (1.3) The model import tool in the real-time analysis engine receives the file and parses the CIM / E file content.

[0012] (1.4) Automatically generate the internal ID of the real-time analysis engine according to the regional information, device type and the preset ID unified coding rules;

[0013] (1.5) Store the parsed model data in the model library.

[0014] Furthermore, the step (2) comprises the following steps:

[0015] (2.1) In the areas where the new generation has been put into operation, the regional new generation control system extracts the stock model data into the equipment model table of the real-time analysis engine through the ETL tool, including regional information, internal ID, PMS resource ID, PMS asset ID, and equipment type information;

[0016] (2.2) Verify the consistency between the region’s new generation control internal ID and the real-time analysis engine ID to ensure that there is no need to regenerate the ID;

[0017] (2.3) The extracted model data is stored in the model library of the real-time analysis engine to complete the synchronization.

[0018] Furthermore, the step (3) of synchronizing the stock model includes the following steps:

[0019] (3.1) The real-time analysis engine sends a subscription request to the control cloud model data platform, and can choose to subscribe to the entire table, region, plant station, or feeder.

[0020] (3.2) The model data platform queries and cuts, splits, and combines to generate CIM / E standard format model files based on subscription requests;

[0021] (3.3) Publish the CIM / E standard format model file to the real-time analysis engine;

[0022] (3.4) The model review tool of the real-time analysis engine parses the CIM / E file and compares the differences with the existing model;

[0023] (3.5) After manual review and confirmation, the model is imported into the model library.

[0024] Furthermore, the step (3) of automatically synchronizing the incremental model includes the following steps:

[0025] (3.6) The control cloud uses streaming processing technology to actively push the model data that changes in real time to the real-time analysis engine;

[0026] (3.7) After receiving the incremental data, the real-time analysis engine filters, splits, reorganizes, and converts it to generate a recognizable general incremental data file;

[0027] (3.8) The automatic synchronization service of the real-time analysis engine monitors the incremental message files, parses and stores them in the database, and completes the automatic update of the incremental model.

[0028] The power grid unified model design system described in the present invention includes a unified model structure design module and a unified model structure synchronization module; the unified model structure design module includes an ID encoding module and a structured object design module; the unified model structure synchronization module includes a content synchronization module and a mode synchronization module.

[0029] Furthermore, the ID encoding module adopts a four-segment variable-length character string encoding method, and the encoding length is between 14 and 18 bits.

[0030] Furthermore, the four-segment variable-length character string encoding method includes:

[0031] Object classification: used to clearly identify the category of the object represented by the code, ensuring that the initial classification of the code is clear and unambiguous;

[0032] Object labeling: used to further refine object classification, provide unique identifiers for different objects in the same category, and enhance the distinguishability of coding;

[0033] Create an institution code: used to identify the institution or organization that generates the code, ensuring the attribution and traceability of the code;

[0034] Serial number: used to uniquely identify each specific object of the same category and designation under the same organization, ensuring the uniqueness and continuity of the code.

[0035] Furthermore, the structured object design module inherits the model structure from the control cloud structured design, maps and converts the basic information of the power grid physical model, the static parameters of the model, and the topological structure information of the model from the control cloud system structured design to the real-time analysis engine; expands the application model, and adds application data information based on the power grid physical model; and divides the distribution network model object table in detail, including the distribution network container model, the distribution network primary equipment model, the distribution network secondary equipment model, and the new energy equipment model.

[0036] Furthermore, the content synchronization module includes distribution network feeders, distribution network switch stations, distribution network combination switches, distribution network switches, distribution network switches, distribution network grounding switches, distribution network loads, distribution network busbars, distribution network transformers, distribution network feeder segments, distribution network fault indicators, distribution network secondary protections, distributed photovoltaic ledgers, energy storage ledgers, and charging piles.

[0037] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: the present invention provides a multi-mode flexible power grid model synchronization mechanism and its implementation method, which can be flexibly selected according to the new generation construction situation in the region, ensuring the consistency, integrity and real-time performance of the model data between the regional power distribution autonomous station and the provincial real-time analysis engine, and improving the operating efficiency and safety of the power system; it can achieve unified management of the model data of the entire network, and provide a transparent access mechanism to meet the needs of different applications for the use of model data. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a flow chart of the model synchronization method of the present invention;

[0039] Figure 2 This is a flow chart for regulating cloud synchronization mode. DETAILED DESCRIPTION

[0040] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0041] like Figure 1 As shown, the unified power grid model design method of the present invention includes:

[0042] Including CIM / E file model synchronization, ETL model synchronization and control cloud synchronization, such as Figure 1 The following are three ways to synchronize models:

[0043] (1) CIM / E file model synchronization:

[0044] (1.1) In areas where the new generation control system is not in operation, the distribution automation system uses the model export tool to export the stock model data into a CIM / E file according to the format specification. The file contains key information such as regional information, internal ID, PMS resource ID, PMS asset ID, and equipment type;

[0045] (1.2) Forward the exported CIM / E files to the provincial level four districts;

[0046] (1.3) The model import tool in the real-time analysis engine receives the file and parses the CIM / E file content.

[0047] (1.4) Automatically generate the internal ID of the real-time analysis engine according to the regional information, device type and the preset ID unified coding rules;

[0048] (1.5) Store the parsed model data in the model library.

[0049] (2) ETL model synchronization:

[0050] (2.1) In the areas where the new generation has been put into operation, the regional new generation control system extracts the inventory model data into the equipment model table of the real-time analysis engine through the ETL tool, including regional information, internal ID, PMS resource ID, PMS asset ID, equipment type and other information;

[0051] (2.2) Verify the consistency between the region’s new generation control internal ID and the real-time analysis engine ID to ensure that there is no need to regenerate the ID;

[0052] (2.3) The extracted model data is stored in the model library of the real-time analysis engine to complete the synchronization.

[0053] (3) Control the cloud synchronization method, such as Figure 2 As shown, it includes stock model synchronization and incremental model automatic synchronization:

[0054] Stock model synchronization:

[0055] (3.1) The real-time analysis engine sends a subscription request to the control cloud model data platform, and can choose to subscribe to the full table, region, plant station, feeder, etc.

[0056] (3.2) The model data platform queries and cuts, splits, and combines to generate CIM / E standard format model files based on subscription requests;

[0057] (3.3) Publish the CIM / E standard format model file to the real-time analysis engine;

[0058] (3.4) The model review tool of the real-time analysis engine parses the CIM / E file and compares the differences with the existing model;

[0059] (3.5) After manual review and confirmation, the model is imported into the model library.

[0060] Incremental model automatic synchronization:

[0061] (3.6) The control cloud uses streaming processing technology to actively push the model data that changes in real time to the real-time analysis engine;

[0062] (3.7) After receiving the incremental data, the real-time analysis engine performs filtering, splitting, reorganization, conversion and other processing to generate a recognizable general incremental data file;

[0063] (3.8) The automatic synchronization service of the real-time analysis engine monitors the incremental message files, parses and stores them in the database, and completes the automatic update of the incremental model.

[0064] The power grid unified model design system described in the present invention includes a unified model structure design module and a unified model structure synchronization module; the unified model structure design module includes an ID encoding module and a structured object design module; the unified model structure synchronization module includes a content synchronization module and a mode synchronization module.

[0065] The unified ID coding adopts global management and unified object ID coding for the whole network; based on the comparison of multiple coding schemes, a four-segment variable-length string coding method is designed by comprehensively considering factors such as coding readability, operation efficiency, storage efficiency, and coding space; the string coding method has a coding length between 14 and 18 bits and consists of the following four parts:

[0066] Object classification (2 bits): used to clearly identify the category of the object represented by the code, ensuring that the initial classification of the code is clear and unambiguous;

[0067] Object identification (2 bits): further refines the object classification, provides unique identification for different objects under the same category, and enhances the discrimination of the code;

[0068] Creation agency code (6 digits): used to identify the agency or organization that generates the code, ensuring the attribution and traceability of the code;

[0069] Serial number (4 to 8 digits): As the last part of the code, its length can be flexibly adjusted according to actual needs. It is used to uniquely identify each specific object of the same category and designation under the same organization, ensuring the uniqueness and continuity of the code.

[0070] The structured object design is based on the State Grid CIM model specification to design a real-time analysis business power grid model as the data basis for the real-time analysis engine; inherit the model structure from the control cloud structured design, keep the ID code consistent with the control cloud, and map the basic information of the power grid physical model, the static parameters of the model, and the topological structure information of the model from the control cloud system structured design to the real-time analysis engine; expand the application model and add application data information on the basis of the power grid physical model; divide the distribution network model object table in detail, including four categories: distribution network container model, distribution network primary equipment model, distribution network secondary equipment model, and new energy equipment model;

[0071] The distribution network container model also refers to the distribution network public equipment model, including three types of objects: distribution network feeder, distribution station and combination switch. The distribution station is divided into switch station, distribution room, ring network cabinet, box transformer and other types;

[0072] The distribution network primary equipment model includes 12 types of objects, including distribution network feeder segments, distribution network circuit breakers, distribution network load switches, distribution network fuses, distribution network switches, distribution network grounding switches, distribution network busbars, distribution network transformers, distribution network transformer windings, distribution network capacitors, distribution network towers, distribution network loads, etc.

[0073] The distribution network secondary equipment model includes two types of objects: distribution network protection node and distribution network fault indicator;

[0074] The new energy equipment models include 17 types of objects, including new energy grid connection points, new energy inverters, new energy inverter ports, new energy collectors, new energy photovoltaic power stations, new energy photovoltaic generators, new energy photovoltaic inverters, new energy photovoltaic combiner boxes, new energy photovoltaic box transformers, new energy energy storage power stations, new energy charging and swapping stations, new energy charging piles, new energy energy storage battery packs, new energy wind farms, new energy wind measurement towers, new energy wind turbines, and new energy meteorological stations.

[0075] The model synchronization module of the unified model design scheme mainly includes: model content synchronization module and model mode synchronization module. The model content synchronization mainly includes distribution network feeder, distribution network switch station, distribution network combination switch, distribution network switch, distribution network knife switch, distribution network grounding knife switch, distribution network load, distribution network bus, distribution network transformer, distribution network feeder section, distribution network fault indicator, distribution network secondary protection, distributed photovoltaic ledger, energy storage ledger, charging pile station;

[0076] The distribution network feeder synchronization content includes feeder ID number, feeder name, affiliated plant station, rdf_id, commissioning status, pms_id, psrid;

[0077] The distribution network switch station synchronization content includes the switch station name, affiliated feeder, rdf_id, commissioning status, pmsid, and psrid;

[0078] The synchronization content of the distribution network switch / distribution network switch / distribution network grounding switch includes name, feeder, switch station, rdf_id, node 1, node 2, commissioning status, voltage type ID number, pms_id, combined equipment, sub-equipment serial number, asset 1D, psrid;

[0079] The distribution network load synchronization content includes load name, feeder, rdf_id, node 1, operation status, rated capacity (KVA), pms_id, asset ID, and psrid;

[0080] The distribution network bus synchronization content includes bus name, feeder, switch station, rdf_id, node number, operation status, voltage type ID number, pms_id, asset ID, psrid;

[0081] The distribution network combination switch synchronization content includes the combination switch name, the feeder, the switch station, rdf_id, pms_id, and psrid;

[0082] The distribution network secondary protection synchronization content includes protection ID, protection name, protection type, and equipment PMSID; the distribution network transformer synchronization content includes transformer name, affiliated feeder, affiliated switch station, high-end node number, commissioning status, high-end voltage type, pms_id, asset ID, and psrid;

[0083] The distribution network feeder segment synchronization content includes the feeder segment name, the feeder to which it belongs, rdf_id, node number 1, operation status, voltage type ID number, pms_id, main network load rdf_id, and psrid.

Claims

1. A method for designing a unified power grid model, characterized in that: The steps include: (1) CIM / E file model synchronization; (2) ETL model synchronization; (3) Adjust the cloud synchronization mode, including synchronization of existing models and automatic synchronization of incremental models.

2. The method for designing a unified power grid model according to claim 1, characterized in that: The step (1) comprises the following steps: (1.1) In areas where the new generation control system is not in operation, the distribution automation system uses the model export tool to export the stock model data into CIM / E files according to the format specifications. The CIM / E files contain key information such as regional information, internal ID, PMS resource ID, PMS asset ID, and equipment type; (1.2) Forward the exported CIM / E files to the provincial level four districts; (1.3) The model import tool in the real-time analysis engine receives the file and parses the CIM / E file content. (1.4) Automatically generate the internal ID of the real-time analysis engine according to the regional information, device type and the preset ID unified coding rules; (1.5) Store the parsed model data in the model library.

3. The method for designing a unified power grid model according to claim 1, characterized in that: The step (2) comprises the following steps: (2.1) In the areas where the new generation has been put into operation, the regional new generation control system extracts the stock model data into the equipment model table of the real-time analysis engine through the ETL tool, including regional information, internal ID, PMS resource ID, PMS asset ID, and equipment type information; (2.2) Verify the consistency between the region’s new generation control internal ID and the real-time analysis engine ID to ensure that there is no need to regenerate the ID; (2.3) The extracted model data is stored in the model library of the real-time analysis engine to complete the synchronization.

4. The method for designing a unified power grid model according to claim 1, characterized in that: The step (3) of synchronizing the stock model includes the following steps: (3.1) The real-time analysis engine sends a subscription request to the control cloud model data platform, and can choose to subscribe to the entire table, region, plant station, or feeder. (3.2) The model data platform queries and cuts, splits, and combines to generate CIM / E standard format model files based on subscription requests; (3.3) Publish the CIM / E standard format model file to the real-time analysis engine; (3.4) The model review tool of the real-time analysis engine parses the CIM / E file and compares the differences with the existing model; (3.5) After manual review and confirmation, the model is imported into the model library.

5. The method for designing a unified power grid model according to claim 1, characterized in that: The step (3) of automatically synchronizing the incremental model includes the following steps: (3.6) The control cloud uses streaming processing technology to actively push the model data that changes in real time to the real-time analysis engine; (3.7) After receiving the incremental data, the real-time analysis engine filters, splits, reorganizes, and converts it to generate a recognizable general incremental data file; (3.8) The automatic synchronization service of the real-time analysis engine monitors the incremental message files, parses and stores them in the database, and completes the automatic update of the incremental model.

6. A unified power grid model design system, characterized in that: It includes a unified model structure design module and a unified model structure synchronization module; the unified model structure design module includes an ID coding module and a structured object design module; the unified model structure synchronization module includes a content synchronization module and a mode synchronization module.

7. The unified power grid model design system according to claim 6, characterized in that: The ID encoding module adopts a four-segment variable-length character string encoding method, and the encoding length is between 14 and 18 bits.

8. The unified power grid model design system according to claim 7, characterized in that: The four-segment variable-length character string encoding method comprises: Object classification: used to clearly identify the category of the object represented by the code, ensuring that the initial classification of the code is clear and unambiguous; Object labeling: used to further refine object classification, provide unique identifiers for different objects in the same category, and enhance the distinguishability of coding; Create an institution code: used to identify the institution or organization that generates the code, ensuring the attribution and traceability of the code; Serial number: used to uniquely identify each specific object of the same category and designation under the same organization, ensuring the uniqueness and continuity of the code.

9. The unified power grid model design system according to claim 6, characterized in that: The structured object design module inherits the model structure from the control cloud structured design, maps and converts the basic information of the power grid physical model, the static parameters of the model, and the topological structure information of the model from the control cloud system structured design to the real-time analysis engine; expands the application model, and adds application data information based on the power grid physical model; The distribution network model object table is divided in detail, including the distribution network container model, the distribution network primary equipment model, the distribution network secondary equipment model and the new energy equipment model.

10. The unified power grid model design system according to claim 6, characterized in that: The content synchronization module includes distribution network feeders, distribution network switch stations, distribution network combination switches, distribution network switches, distribution network switches, distribution network grounding switches, distribution network loads, distribution network busbars, distribution network transformers, distribution network feeder segments, distribution network fault indicators, distribution network secondary protections, distributed photovoltaic ledgers, energy storage ledgers, and charging piles.

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