基于PSCAD/EMTDC的特高压直流输电系统并行仿真研究与应用  

Research and application of parallel simulation of a UHVDC system based on PSCAD/EMTDC

作　　者：胡永昌 李泰 曹森 苏进国 张艳浩 李艳梅 HU Yongchang;LI Tai;CAO Sen;SU Jinguo;ZHANG Yanhao;LI Yanmei(XJ Electric Co.,Ltd.,Xuchang 461000,China)

机构地区：[1]许继电气股份有限公司,河南许昌461000

出　　处：《电力系统保护与控制》2021年第17期178-186,共9页Power System Protection and Control

基　　金：国家电网有限公司总部指南科技项目资助“基于特高压直流换流站多场景仿真的保护及调控辅助校核技术研究和应用”(SGJ0000DKJS1900863)。

摘　　要：为提升特高压直流输电系统仿真效率,提出了基于PSCAD/EMTDC的多核并行仿真方法。通过模型拆分和多进程并行运算,该方法解决了大规模直流系统离线电磁暂态仿真无法运行或者效率低的问题。首先,介绍了一次系统和控制保护装置的高精度建模方法和原则。然后,针对一次系统,在长线路自然解耦的基础上,提出一种基于主回路现有元件的等效短线路解耦方法,解决了在无线路或者短线路情况下分网并行的接口问题,并制定了一次系统解耦分网方案。最后,为解决多仿真进程并行之间的通信和同步问题,设计了基于共享内存的多进程并行方法。以雁门关-淮安特高压直流工程为例搭建多核并行模型,通过对比试验验证了该并行方法可大大提升仿真效率,且不会影响仿真精度。To improve the simulation efficiency of a UHVDC system,a multi-core parallel simulation method based on PSCAD/EMTDC is proposed.Through model splitting and multi process parallel operation,this method solves the problem of inability to run or low efficiency in the offline electromagnetic transient simulation of a large-scale DC system.First,high-precision modeling methods and principles of primary systems and control and protection devices are introduced.Then,for the primary system,based on the natural decoupling of long lines,an equivalent short line decoupling method based on the existing components of the main circuit is proposed.This solves the problem of parallel interfaces in the case of no line or short lines,and the decoupling and network division scheme of the primary system is formulated.Finally,in order to solve the problem of communication and synchronization between multi simulation processes,a multi process parallel method based on shared memory is designed.Taking the Yanmenguan-Huaian UHVDC project as an example,a multi-core parallel model is built.Through comparative experiments,it is verified that the parallel method can greatly improve simulation efficiency without affecting accuracy.

关 键 词：特高压直流输电 PSCAD/EMTDC 短线路解耦 多进程并行 模型验证 

分 类 号：TM721.1[电气工程—电力系统及自动化]