应对多馈入直流换相失败的同步调相机布点方法  

Method of Site Selection for Synchronous Condenser Responding to Commutation Failures of Multi-infeed DC System

作　　者：王强[1] 李天然[1] 唐小波[1] 刘福锁 雷杰 袁超 WANG Qiang;LI Tianran;TANG Xiaobo;LIU Fusuo;LEI Jie1YUAN Chao(School of NARI Electric and Automation,Nanjing Normal University,Nanjing 210042,China;NARI Group Corporation (State Grid Electric Power Research Institute),Nanjing 211106,China)

机构地区：[1]南京师范大学南瑞电气与自动化学院,江苏省南京市210042 [2]南瑞集团(国网电力科学研究院)有限公司,江苏省南京市211106

出　　处：《电力系统自动化》2019年第1期222-227,共6页Automation of Electric Power Systems

基　　金：智能电网保护和运行控制国家重点实验室资助项目(2017111TS90183);江苏省研究生科研与实践创新计划资助项目(KYCX18_1224)~~

摘　　要：特高压直流输电网受端交流故障诱发的直流换相失败会造成系统短时大量功率短缺,对系统安全稳定性带来巨大威胁。同步调相机因其强大的动态无功支撑能力,在应对多馈入直流换相失败及加快系统暂态恢复过程方面受到了越来越多的关注。从多馈入直流间相互作用角度出发,分析了调相机应对多馈入直流换相失败的优势,结合多馈入交互作用因子、多馈入有效短路比及相对暂态电压跌落面积指标,逐层确定最佳的动态无功补偿站点,提出一种可运用于工程实际的调相机应对多馈入直流换相失败的布点方法,并在华东电网数据典型运行方式的基础上进行了仿真验证。Faults occurring in receiving-end alternate current(AC)grid of multi-infeed high-voltage direct current(HVDC)system may result in simultaneous commutation failures and short-time huge power shortage,which are great threats to the stability of power grid.Due to the strong support abilities in reactive power,synchronous condenser has received more and more attention in restraining commutation failures of multi-infeed DC systems and speeding up the transient recovery process after faults.From the angle of interplay between multi-infeed DC systems,the superiority of synchronous condenser in restraining commutation failures is analyzed,and then the best dynamic reactive power compensation node level are determined by combining with concepts of multi-infeed interaction factor(MIIF),multi-infeed effective short circuit ratio(MESCR)and relative-transient-voltage-drop-area index(RTVDAI).Finally,a reliable and applicable method for the site selection of synchronous condenser responding to commutation failures in multi-infeed HVDC system is proposed,and the simulation is carried out on the basis of typical operation mode of East China power grid.

关 键 词：换相失败 同步调相机 交互作用因子 多馈入有效短路比 暂态电压跌落面积指标 

分 类 号：TM721.1[电气工程—电力系统及自动化]