基于动态相量的LCC-HVDC输电系统等值技术评述  

Overview of LCC-HVDC Transmission System Equivalent Technology Based on Dynamic Phasor

作　　者：王宾[1] 何小才 WANG Bin;HE Xiaocai(State Key Lab of Control and Simulation of Power Systems and Generation Equipments(Tsinghua University),Haidian District,Beijing 100084,China)

机构地区：[1]电力系统及大型发电设备控制和仿真国家重点实验室(清华大学),北京市海淀区100084

出　　处：《中国电机工程学报》2024年第1期58-71,I0005,共15页Proceedings of the CSEE

基　　金：国家自然科学基金项目(52077116);电力系统及大型发电设备安全控制和仿真国家重点实验室自主课题(SKLD21M09);国家电网公司科技项目(5100-202199511A-0-5-ZN)。

摘　　要：立足于逆变侧换流站受端交流母线看向送端的基于电网换相换流器的高压直流输电(high-voltagedirectcurrent basedlinecommutedconverter,LCC-HVDC)系统的单端等值,对于优化设计继电保护、安稳控制和直流控保具有重要意义。为了同时获取计算的高精确性和实时性,动态相量模型以牺牲较低的仿真精度换取计算速度的提升,是实现LCC-HVDC输电线路双端等值的重要方式,但是用于LCCHVDC输电系统单端等值还存在难以平衡等值精度和计算速度的问题。针对该问题,该文分析了基于动态相量的LCCHVDC输电系统等值的应用价值、需求及难点,分别从等值计算模型中的提前触发角计算、换相重叠角计算、换相失败的判别及其对开关函数的影响和信号调制等4个因素评述现有研究现状及存在的问题,并提出了后续的研究建议。Based on the AC bus at the receiving end of the inverter side converter station,the single end equivalence of the LCC-HVDC transmission system is of great significance for the optimal design of relay protection,stability control and DC control and protection.To obtain the high accuracy and real-time of calculation at the same time,the dynamic phasor model is used as an important way to realize the double terminal equivalence of LCC-HVDC transmission line at the expense of low simulation accuracy.However,there are still many problems in the single terminal equivalence of LCC-HVDC transmission system.To solve this problem,this paper analyzes the application value,requirements and difficulties of LCC-HVDC transmission system equivalence based on dynamic phasor,reviews the existing research status and existing problems from four factors in the equivalence calculation model,such as early trigger angle calculation,commutation overlap angle calculation,commutation failure discrimination and its influence on switching function and signal modulation,and puts forward follow-up research suggestions.

关 键 词：高压直流输电 动态相量 等值计算 换相失败 

分 类 号：TM744[电气工程—电力系统及自动化]