LCC-HVDC输电系统单端等值可行性分析  

Feasibility Analysis of Single-terminal Equivalent of LCC-HVDC Transmission System

作　　者：王宾[1] 何小才 郭琦 刘志江 李书勇 李志中[1] WANG Bin;HE Xiaocai;GUO Qi;LIU Zhijiang;LI Shuyong;LI Zhizhong(State Key Laboratory of Control and Simulation of Power Systems and Generation Equipments(Department of Electrical Engineering,Tsinghua University),Beijing 100084,China;State Key Laboratory of HVDC,CSG Electric Power Research Institute Co.,Ltd.,Guangzhou,Guangdong 510663,China;National Energy Power Grid Technology R&D Center,Guangzhou,Guangdong 510663,China;Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System,Guangzhou,Guangdong 510663,China;CSG Key Laboratory for Power System Simulation,Guangzhou,Guangdong 510663,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(清华大学电机系),北京100084 [2]直流输电技术国家重点实验室(南方电网科学研究院有限责任公司),广东广州510663 [3]国家能源大电网技术研发(实验)中心,广东广州510663 [4]广东省新能源电力系统智能运行与控制企业重点实验室,广东广州510663 [5]中国南方电网有限责任公司电网仿真重点实验室,广东广州510663

出　　处：《广东电力》2021年第11期11-18,共8页Guangdong Electric Power

基　　金：直流输电技术国家重点实验室开放基金项目(SKLHVDC-2019-KF-23);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项目(SKLD21M09)。

摘　　要：为解决交流大扰动下电网换相换流器型高压直流(line commutated converter based HVDC,LCC-HVDC)输电系统等值计算模型中整流侧信息不易获取的问题,基于动态相量模型和准稳态模型,建立基于受端交流信息下LCC-HVDC的建模方法,针对受端换流器容易发生的换相失败问题,创建基于换相机理的开关函数的修改方法。故障仿真结果表明,该方法可以较为准确地反映受端交流扰动下的暂态响应特征,同时该方法还提高了计算速度,实现了仅基于受端交流信息下LCC-HVDC的高精度、实时化计算。In order to solve the problem that electrical information of the rectifier side is not easy to obtain in the equivalent model of line commutated converter based HVDC(LCC-HVDC)system under large AC disturbance,this paper establishes a model of LCC-HVDC system at the inverter side based on dynamic phasor model and the quasi-steady state model.As for the problem of commutation failure easily occurring at the inverter side,it constructs a modification method of switching function according to commutation mechanism.The fault simulation results show that the method can accurately reflect the transient response characteristics of AC disturbance at the inverter side.Meanwhile,this method also improves calculation speed,thereby realizing high-precision and real-time calculation of the LCC-HVDC system based on AC information at the inverter side only.

关 键 词：高压直流输电 准稳态模型 动态向量法 换相失败 

分 类 号：TM744[电气工程—电力系统及自动化]