2018年多直流馈入江苏规划电网连锁换相失败分析  

Analysis on Commutation Failures in Multi-infeed HVDC System in Planning Power Grid of Jiangsu in 2018

作　　者：周前[1] 张潮 张宁宇[1] 邵雨薇 王思成 韩松 ZHOU Qian;ZHANG Chao;ZHANG Ningyu;SHAO Yuwei;WANG Sicheng;HAN Song(State Grid Key Laboratory of Substation Intelligent Equipment Testing Teehnology （Jiangsu Electric Power Co., Ltd. Research Institute） , Nanjing 211103, China;School of Electrieal Engineering, Southeast University, Nanjing 210096, China)

机构地区：[1]国家电网公司变电站智能设备检测技术重点实验室(国网江苏省电力有限公司电力科学研究院),江苏南京211103 [2]东南大学电气工程学院,江苏南京210096

出　　处：《电力工程技术》2018年第1期51-57,共7页Electric Power Engineering Technology

基　　金：江苏省自然科学基金资助项目(BK20160678);国家电网公司科技项目(5210EF17001G)

摘　　要：针对2018年多直流馈入江苏规划电网,基于电力系统仿真程序PSD-BPA,研究了受端交流系统故障导致直流连锁换相失败及闭锁的问题,总结了多馈入交互作用因子以及节点电压交互作用因子在实际电网中的应用规律。由于江苏电网多回直流之间存在一定的相互耦合作用,当交流系统中主要线路发生故障后,会引起多条直流的连锁换相失败。此外,由于耦合程度的大小,相比于直流换流母线处发生故障,直流逆变站邻近交流母线故障后会造成更多直流的连锁换相失败。由于减轻多直流间交互作用的措施多数投资较大,江苏电网应在实际运行时给予这些交流母线故障更多的关注。Based on the multi-infeed planning power grid of Jiangsu in 2018, the chain commutation failure and HVDC pole blocking problem after three short-circuit faults occurring in AC system are studied by using electromechanical transient simulation software PSD-PBA. Besides, the multi-infeed interaction factor（MIIF） and voltage interaction factor＇s（VIF） laws of usage in power grid are summarized. The results show that several important AC lines＇ short-circuit fault will lead to more than one DC inverter＇ s commutation failure because of the interaction between 4 HVDC transmission systems. In addition, compared to phase-to-ground faults occurring in commutation buses, faults occurring in AC line near inverter will cause more chain commutation failures because of the different coupling relationships. Since most measures of mitigating the interaction between HVDC transmission systems require a large investment, those AC faults should be given enough attention in Jiangsu power grid.

关 键 词：江苏电网 多直流馈入 换相失败 多馈入交互作用因子 

分 类 号：TM721[电气工程—电力系统及自动化]