CN-122026466-A - Multi-extra-high voltage direct current interconnection simulation method, system, electronic equipment and storage medium

CN122026466ACN 122026466 ACN122026466 ACN 122026466ACN-122026466-A

Abstract

The invention relates to the technical field of power simulation, and provides a multi-extra-high voltage direct current interconnection simulation method, a system, electronic equipment and a storage medium. The implementation scheme is that an electromagnetic transient simulation model is divided into a plurality of sub-models, the plurality of sub-models are respectively loaded to each data processing rack, each data processing rack carries out iterative operation solving on each sub-model in parallel under the control of a clock synchronous signal sent by a synchronous signal hub, operation solving results of each iteration are mutually exchanged through a plurality of data switches to obtain each operation solving result, and the simulation result of the multi-extra-high voltage direct current interconnection simulation system is determined based on each operation solving result. According to the embodiment of the invention, the complex electromagnetic transient simulation model is segmented and loaded to a plurality of parallel computing nodes, and a strict clock synchronization and high-speed data exchange mechanism is adopted, so that efficient and accurate simulation of the complex electromagnetic transient process of the multi-extra-high voltage direct current interconnection system is realized.

Inventors

XU YING
DONG JIASHENG
GAO ZIJIAN
MA YULONG
ZHANG FAN
LI TAN
LI ZHICHUANG
ZHOU BANGHAO
LI YUXUAN
WANG LUO

Assignees

国网经济技术研究院有限公司
国网河北省电力有限公司经济技术研究院

Dates

Publication Date: 20260512
Application Date: 20260121

Claims (10)

1. The multi-extra-high voltage direct current interconnection simulation method is characterized by being applied to a multi-extra-high voltage direct current interconnection simulation system, wherein the multi-extra-high voltage direct current interconnection simulation system comprises a plurality of data processing racks, a synchronous signal hub and a plurality of data switches, and the synchronous signal hub and the data switches are used for interconnecting the plurality of data processing racks, and the method comprises the following steps: Acquiring electrical topology parameters and equipment parameters of the multi-extra-high voltage direct current interconnection simulation system to construct an electromagnetic transient simulation model; Dividing the electromagnetic transient simulation model into a plurality of sub-models, and respectively loading the plurality of sub-models to each data processing rack; Under the control of a clock synchronizing signal sent by the synchronizing signal hub, each data processing rack carries out iterative operation solving on each sub-model in parallel, and the operation solving results of each iteration are mutually exchanged through the multi-data exchange machine so as to obtain each operation solving result; And determining a simulation result of the multi-extra-high voltage direct current interconnection simulation system based on the calculation results.
2. The method according to claim 1, wherein the performing, by each of the data processing racks, iterative operation solutions on each of the submodels in parallel under the control of the clock synchronization signal sent by the synchronization signal hub, and exchanging the operation solutions of each iteration with each other through the plurality of switches to obtain each operation solution result, includes: initializing initial values of state variables of the sub-models, and taking the initial values as input data of simulation step sizes; And under the condition that the simulation duration does not reach the preset iteration termination condition, the following operations are circularly executed: transmitting the clock synchronization signal by the synchronization signal hub to each of the data processing racks; after receiving the clock synchronization signal, each data processing rack carries out operation solving on the sub-model carried by each data processing rack in parallel based on the input data of the simulation step length so as to generate an instantaneous operation result of the simulation step length; recording the instantaneous operation result of the simulation step length; The data processing racks exchange boundary variable data required by the next simulation step length in the instantaneous operation result through the multi-data switch, and the exchanged data are updated into input data of the next simulation step length; And stopping the loop under the condition that the simulation duration accords with the preset iteration termination condition, and determining each operation solving result based on each recorded instantaneous operation result.
3. The method of claim 1, wherein the obtaining the electrical topology parameters and the device parameters of the multiple extra-high voltage dc interconnect simulation system to construct an electromagnetic transient simulation model comprises: constructing an alternating current power grid model based on electric topology parameters corresponding to each power grid topology structure in the multi-extra-high voltage direct current interconnection simulation system; constructing a direct current power transmission network model based on equipment parameters and technical types of each converter station in the multi-extra-high voltage direct current interconnection simulation system; integrating the alternating current power grid model and the direct current power transmission network model according to each topological connection relation to obtain a model topological structure; And carrying out parameterization configuration on the model topological structure to obtain the electromagnetic transient simulation model.
4. The method according to claim 3, wherein the constructing an ac power grid model based on the electrical topology parameters corresponding to each power grid topology in the multiple extra-high voltage dc interconnection simulation system includes: obtaining electric topology parameters corresponding to each power grid topological structure in the multi-extra-high voltage direct current interconnection simulation system, wherein each power grid topological structure comprises a power supply center topology and a load center topology; constructing a transmitting-end alternating current network model based on the electrical topology parameters corresponding to the power supply center topology; constructing a receiving end alternating current network model based on the electrical topology parameters corresponding to the load center topology; And determining the alternating current power grid model based on the sending end alternating current network model and the receiving end alternating current network model.
5. The method of claim 1, wherein the partitioning the electromagnetic transient simulation model into a plurality of sub-models and loading the plurality of sub-models into each of the data processing racks, respectively, comprises: Partitioning the electrical topology of the electromagnetic transient simulation model based on a preset calculation load balancing principle and a communication delay minimizing principle to obtain each sub-model; Mapping each sub-model and each data processing rack respectively to obtain a data processing rack corresponding to each sub-model; And loading the data files in each sub-model to the data processing rack corresponding to each sub-model.
6. The method of claim 1, wherein the multiple extra-high voltage dc interconnect simulation system further comprises a data acquisition module coupled to each of the data processing racks, the method further comprising: Collecting one or more hardware-in-the-loop test signals of external physical equipment in real time through the data collection module; Performing digital processing on the hardware-in-loop test signal to obtain a digital processing result; And sending the digital processing result to a data processing rack connected with the data acquisition module.
7. A multiple extra-high voltage direct current interconnection simulation system, the multiple extra-high voltage direct current interconnection simulation system comprising a plurality of data processing racks, and a synchronization signal hub and a plurality of data switches interconnecting a plurality of the data processing racks, the system configured to: Acquiring electrical topology parameters and equipment parameters of the multi-extra-high voltage direct current interconnection simulation system to construct an electromagnetic transient simulation model; Dividing the electromagnetic transient simulation model into a plurality of sub-models, and respectively loading the plurality of sub-models to each data processing rack; Under the control of a clock synchronizing signal sent by the synchronizing signal hub, each data processing rack carries out iterative operation solving on each sub-model in parallel, and the operation solving results of each iteration are mutually exchanged through the multi-data exchange machine so as to obtain each operation solving result; And determining a simulation result of the multi-extra-high voltage direct current interconnection simulation system based on the calculation results.
8. The system according to claim 7, wherein each of the data processing racks performs iterative operation solving on each of the submodels in parallel under the control of the clock synchronization signal sent by the synchronization signal hub, and exchanges operation solving results of each iteration with each other through the plurality of data exchanges to obtain each operation solving result, specifically for: initializing initial values of state variables of the sub-models, and taking the initial values as input data of simulation step sizes; And under the condition that the simulation duration does not reach the preset iteration termination condition, the following operations are circularly executed: transmitting the clock synchronization signal by the synchronization signal hub to each of the data processing racks; after receiving the clock synchronization signal, each data processing rack carries out operation solving on the sub-model carried by each data processing rack in parallel based on the input data of the simulation step length so as to generate an instantaneous operation result of the simulation step length; recording the instantaneous operation result of the simulation step length; The data processing racks exchange boundary variable data required by the next simulation step length in the instantaneous operation result through the multi-data switch, and the exchanged data are updated into input data of the next simulation step length; And stopping the loop under the condition that the simulation duration accords with the preset iteration termination condition, and determining each operation solving result based on each recorded instantaneous operation result.
9. An electronic device, comprising: And a memory communicatively coupled to the at least one processor; Wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-6.
10. A non-transitory computer readable storage medium storing computer instructions for causing a computer to perform the method of any one of claims 1-6.

Description

Multi-extra-high voltage direct current interconnection simulation method, system, electronic equipment and storage medium Technical Field The invention relates to the technical field of power simulation, in particular to a multi-extra-high voltage direct current interconnection simulation method, a system, electronic equipment and a storage medium. Background With the rapid development of new power systems, multi-terminal high voltage direct current transmission systems (Multi-TERMINAL HIGH Voltage Direct Current, MT-HVDC) are widely used in large-scale new energy grid connection, trans-regional power interconnection and flexible grid construction. The multi-extra-high voltage direct current interconnection system generally comprises a plurality of direct current converter stations, a complex direct current network structure and deep coupling with a plurality of alternating current power grids, wherein the complex electromagnetic transient processes such as quick switching of the converter, control and protection actions, alternating current-direct current interaction and the like are involved in the operation process. In the existing power system simulation technology, electromagnetic transient simulation (Electromagnetic Transient Simulation, EMT) can accurately describe electromagnetic behaviors and transient responses in a converter, but under the background that the scale of a multi-extra-high voltage direct current interconnection system is continuously enlarged, the system topology complexity and model dimension are obviously increased, so that the simulation calculation amount is rapidly increased, and the simulation precision and calculation efficiency are difficult to be considered. On one hand, the adoption of a fine modeling mode can improve the simulation precision, but often causes limited simulation step length and overlong calculation time, which is unfavorable for large-scale system analysis and multi-working-condition simulation, and on the other hand, the adoption of a simplified model or an equivalent method can improve the calculation speed, but easily ignores key electromagnetic transient characteristics, and influences the accuracy and reliability of a simulation result. Therefore, how to improve the simulation calculation efficiency while guaranteeing the electromagnetic transient simulation precision of the multi-extra-high voltage direct current interconnection system so as to realize efficient and accurate simulation of the complex electromagnetic transient process is a technical problem to be solved in the field. Disclosure of Invention The invention provides a multi-extra-high voltage direct current interconnection simulation method, a system, electronic equipment and a storage medium, which can solve at least one technical problem. In a first aspect, an embodiment of the present invention provides a multi-extra-high voltage dc interconnection simulation method, which is applied to a multi-extra-high voltage dc interconnection simulation system, where the multi-extra-high voltage dc interconnection simulation system includes a plurality of data processing racks, and a synchronization signal hub and a multi-data switch that interconnect the plurality of data processing racks, and the method includes: Acquiring electrical topology parameters and equipment parameters of the multi-extra-high voltage direct current interconnection simulation system to construct an electromagnetic transient simulation model; Dividing the electromagnetic transient simulation model into a plurality of sub-models, and respectively loading the plurality of sub-models to each data processing rack; Under the control of a clock synchronizing signal sent by the synchronizing signal hub, each data processing rack carries out iterative operation solving on each sub-model in parallel, and the operation solving results of each iteration are mutually exchanged through the multi-data exchange machine so as to obtain each operation solving result; And determining a simulation result of the multi-extra-high voltage direct current interconnection simulation system based on the calculation results. In a second aspect, an embodiment of the present invention provides a multiple extra-high voltage direct current interconnection simulation system, where the multiple extra-high voltage direct current interconnection simulation system includes a plurality of data processing racks, and a synchronization signal hub and a multiple data switch that interconnect a plurality of the data processing racks, and the system is configured to: Acquiring electrical topology parameters and equipment parameters of the multi-extra-high voltage direct current interconnection simulation system to construct an electromagnetic transient simulation model; Dividing the electromagnetic transient simulation model into a plurality of sub-models, and respectively loading the plurality of sub-models to each data processing rack; Under the control of a