三华电网特高压交直流输电系统交互影响及控制策略  

Control Strategies and Interactions of UHVAC and UHVDC Transmission Systems in North China-Central China-East China Power Grid

作　　者：齐以涛[1] 彭慧敏 杨莹 周海锋 潘学萍[1] 

机构地区：[1]河海大学能源与电气学院,江苏南京210098 [2]南瑞集团公司,江苏南京210003

出　　处：《中国电力》2014年第7期51-56,共6页Electric Power

基　　金：国家电网公司大电网重大专项资助项目(SGCC-MPLG001-031-2012);国家电网公司科技资助项目(特高压交直流;多直流协调控制系统研发及示范)~~

摘　　要：研究特高压交直流系统间的相互影响,并提出相应的控制策略对三华电网的安全稳定运行具有重要意义。基于电力系统安全稳定量化分析软件FASTEST,仿真分析了特高压交流系统故障对直流系统的影响、直流闭锁故障对系统稳定性的影响,在此基础上,提出了直流双极闭锁导致系统失稳时的紧急直流功率支援策略。结果表明:三华电网直流受端附近线路故障对直流系统影响最大;除严重危及直流系统的故障外,同一省区内故障点短路电流越大,故障对特高压联络线功率波动影响越大。仿真验证了所提出策略的有效性。Study on the interplay between UHVAC and UHVDC systems and providing reasonable control strategies are of great significance for the security and stability of the interconnected grid of the North China-Central China-East China Power Grid.Therefore,impacts of AC system faults on DC system,and that of DC blocking faults on the whole system were simulated based on software FASTEST that is a kind of software for analyzing security and stability of power system quantitatively,by which a strategy of emergency DC power support was proposed when DC double-pole blocking occurs,which may lead the instability of the grid.The simulation results show that the AC line faults nearby the inverter side have the greatest impact on the DC system,moreover,the larger the short-circuit current of a fault point within the same province is,the more harmful to UHV tie line power will be.Also it is shown that this proposed control strategy is applicable and effective.

关 键 词：交直流 直流闭锁 临界机群 直流功率支援 

分 类 号：TM712[电气工程—电力系统及自动化]