CN-115982974-B - Simulation analysis method and device based on RTDS (real time digital system) large power grid equivalent model

CN115982974BCN 115982974 BCN115982974 BCN 115982974BCN-115982974-B

Abstract

The application discloses a simulation analysis method and a simulation analysis device based on an RTDS large power grid equivalent model, wherein the method comprises the steps of determining a power transmission section of a grid frame, and obtaining a section inner boundary station list and a section outer boundary station list of the power transmission section; the method comprises the steps of obtaining a next-stage station of a line connected with each station in a section inner boundary station list, determining a difference station list according to the relation between the next-stage station and a section outer boundary station list and between the next-stage station and a station list to be built, obtaining a next-stage station of a transformer connected with each station in the section inner boundary station list, determining the difference station list according to the voltage level relation between the next-stage station and the station to be built and the relation between the next-stage station and the section outer boundary station list and between the next-stage station and the station list to be built, taking the stations in the difference station list as the stations to be built, and carrying out power grid simulation modeling. Therefore, under the condition of high-proportion new energy permeation at the present stage, the modeling efficiency and the accuracy of simulation analysis are greatly improved.

Inventors

ZHANG JIE
YU JIAWEI
ZHU YIHUA
HU BINJIANG
WU MINGKANG
GUO HENGDAO
CHANG DONGXU
ZHU YUKUN
LI CHENGXIANG
LIU REN

Assignees

南方电网科学研究院有限责任公司

Dates

Publication Date: 20260508
Application Date: 20221216

Claims (6)

1. A simulation analysis method based on an RTDS large power grid equivalent model is characterized by comprising the following steps: determining a power transmission section of a grid frame, and acquiring a section inner boundary station list and a section outer boundary station list of the power transmission section; acquiring a next-stage site of a line connected with each site in the section inner boundary site list, and determining a difference site list according to the relationship between the next-stage site and the section outer boundary site list and the to-be-built site list; Acquiring a next-stage station of a transformer connected with each station in the section inner boundary station list, and determining a difference station list according to the voltage level relation between the next-stage station and the station to be modeled and the relation between the next-stage station and the section outer boundary station list and the station to be modeled; Taking the stations in the difference station list as stations to be modeled, and performing power grid simulation modeling; The step of obtaining the next-stage site of the line connected with each site in the section inner boundary site list, and determining a difference site list according to the relationship between the next-stage site and the section outer boundary site list and the to-be-built site list, specifically comprising: S21, acquiring a next-stage site of a line connected with an ith site in the section inner boundary site list, wherein the next-stage site is not in the section outer boundary site list and is not in a site list to be built, and taking the next-stage site as a difference site; S22, enabling i=i+1, returning to the step S21 until all stations in the section inner boundary station list are traversed, and obtaining a difference station list; The step of obtaining the next-stage site of the transformer connected with each site in the section inner boundary site list, and determining a difference site list according to the voltage level relation between the next-stage site and the site to be modeled and the relation between the next-stage site and the section outer boundary site list and the site to be modeled, specifically comprising the following steps: S31, acquiring a next-stage site of a transformer connected with an ith site in the section inner boundary site list, and performing voltage level analysis on a second next-stage site when the voltage level of the first next-stage site is smaller than that of the site to be molded; S32, taking the next-stage site as a difference site if the next-stage site is not in the section outer boundary site list and is not in the site to be built list; And S33, making i=i+1, and returning to the step S31 until all stations in the section inner boundary station list are traversed, so as to obtain a difference station list.
2. The simulation analysis method based on the RTDS large power grid equivalent model according to claim 1, wherein the acquiring the next stage site of the line connected to each site in the in-section boundary site list and the acquiring the next stage site of the transformer connected to each site in the in-section boundary site list further includes: And judging whether a station does not exist in the section inner boundary station list, and judging whether the section outer boundary station list contains a certain station in the next-stage multiple stations, if so, ending the algorithm.
3. The simulation analysis system based on the RTDS large power grid equivalent model is characterized by comprising: the device comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for determining a power transmission section of a grid frame and acquiring a section inner boundary station list and a section outer boundary station list of the power transmission section; The first analysis unit is used for acquiring a next-stage site of a line connected with each site in the section inner boundary site list, and determining a difference site list according to the relationship between the next-stage site and the section outer boundary site list and the to-be-built site list; the second analysis unit is used for acquiring the next-stage site of the transformer connected with each site in the section inner boundary site list, and determining a difference site list according to the voltage level relationship between the next-stage site and the site to be modeled and the relationship between the next-stage site and the section outer boundary site list and the relationship between the next-stage site and the site to be modeled; The modeling unit is used for taking the stations in the difference station list as stations to be modeled and performing power grid simulation modeling; the first analysis unit is specifically configured to: S21, acquiring a next-stage site of a line connected with an ith site in the section inner boundary site list, wherein the next-stage site is not in the section outer boundary site list and is not in a site list to be built, and taking the next-stage site as a difference site; S22, enabling i=i+1, returning to the step S21 until all stations in the section inner boundary station list are traversed, and obtaining a difference station list; the first analysis unit is specifically configured to: S31, acquiring a next-stage site of a transformer connected with an ith site in the section inner boundary site list, and performing voltage level analysis on a second next-stage site when the voltage level of the first next-stage site is smaller than that of the site to be molded; S32, taking the next-stage site as a difference site if the next-stage site is not in the section outer boundary site list and is not in the site to be built list; And S33, making i=i+1, and returning to the step S31 until all stations in the section inner boundary station list are traversed, so as to obtain a difference station list.
4. The simulation analysis system based on the RTDS large power grid equivalent model according to claim 3, further comprising a judging unit; the judging unit is used for judging whether the stations do not exist in the section inner boundary station list or not, and whether the section outer boundary station list contains one station in the next-stage multiple stations or not, if yes, the algorithm is ended.
5. An emulation analysis device based on an RTDS large power grid equivalent model, which is characterized by comprising a processor and a memory: The memory is used for storing program codes and transmitting the program codes to the processor; The processor is configured to execute the simulation analysis method based on the RTDS large power grid equivalent model according to any one of claims 1-2 according to the instructions in the program code.
6. A computer readable storage medium for storing program code for performing the RTDS large grid equivalent model based simulation analysis method according to any of claims 1-2.

Description

Simulation analysis method and device based on RTDS (real time digital system) large power grid equivalent model Technical Field The application relates to the technical field of electric power simulation analysis, in particular to a simulation analysis method and device based on an RTDS large power grid equivalent model. Background With the rapid development and the rapid development of the large alternating-current and direct-current hybrid power grid and the penetration of the new energy with high proportion, the full-electromagnetic transient modeling and simulation analysis of the large-scale alternating-current and direct-current hybrid power grid become the necessary requirements for the development of the power grid. However, the electromagnetic transient simulation calculation amount is huge, so that the simulation efficiency is reduced, and the application of the electromagnetic transient simulation calculation amount to an actual large power grid is restricted. Although the real-time digital Simulator (REAL TIME DIGITAL Simulator, RTDS) fully utilizes the massive parallel computing technology, is a currently accepted efficient electromagnetic transient simulation device, in practical application, before the RTDS experiment is passed, a model related to simulation analysis needs to be manually modeled, and if modeling of a plurality of provinces is related, great efforts of simulation staff are required to be consumed for completion. Disclosure of Invention The application provides a simulation analysis method and a simulation analysis device based on an RTDS (real time digital system) large power grid equivalent model, which are used for reducing the establishment and simulation analysis of the large power grid equivalent model on an RTDS platform, and greatly improving the modeling efficiency and the simulation analysis accuracy under the condition of high-proportion new energy permeation at the present stage. In view of this, the first aspect of the present application provides a simulation analysis method based on an RTDS large power grid equivalent model, the method comprising: determining a power transmission section of a grid frame, and acquiring a section inner boundary station list and a section outer boundary station list of the power transmission section; acquiring a next-stage site of a line connected with each site in the section inner boundary site list, and determining a difference site list according to the relationship between the next-stage site and the section outer boundary site list and the to-be-built site list; Acquiring a next-stage station of a transformer connected with each station in the section inner boundary station list, and determining a difference station list according to the voltage level relation between the next-stage station and the station to be modeled and the relation between the next-stage station and the section outer boundary station list and the station to be modeled; and taking the stations in the difference station list as stations to be modeled, and performing power grid simulation modeling. Optionally, the obtaining the next stage site of the line connected to each site in the section inner boundary site list, and determining a difference site list according to the relationship between the next stage site and the section outer boundary site list and the to-be-built site list, specifically includes: S21, acquiring a next-stage site of a line connected with an ith site in the section inner boundary site list, wherein the next-stage site is not in the section outer boundary site list and is not in a site list to be built, and taking the next-stage site as a difference site; S22, letting i=i+1, returning to the step S21 until all stations in the section inner boundary station list are traversed, and obtaining a difference station list. Optionally, the obtaining the next stage site of the transformer connected to each site in the section inner boundary site list, and determining a difference site list according to the voltage level relationship between the next stage site and the site to be modeled, and the relationship between the next stage site and the section outer boundary site list and the relationship between the next stage site and the site to be modeled list, specifically includes: s31, acquiring a next-stage site of a line connected with an ith site in the section inner boundary site list, and performing voltage level analysis on a second next-stage site when the voltage level of the first next-stage site is smaller than that of the site to be molded; S32, taking the next-stage site as a difference site if the next-stage site is not in the section outer boundary site list and is not in the site to be built list; And S33, making i=i+1, and returning to the step S31 until all stations in the section inner boundary station list are traversed, so as to obtain a difference station list. Optionally, the acquiring the next-stage site of the line conne