特高压直流输电线路行波保护电流判据优化  

Optimization Strategy on Current Criterion of Travelling Wave Protection for UHVDC Transmission System

作　　者：田得良 蔡泽祥[1] 梁益[1] 李晓华[1] 李书勇[2] 

机构地区：[1]华南理工大学电力学院，广东 广州 510640 [2]中国南方电网科学研究院有限责任公司，广东 广州 510080

出　　处：《电网技术》2016年第8期2548-2554,共7页Power System Technology

基　　金：国家自然科学基金项目(51377059)

摘　　要：特高压直流工程在实际运行中会发生因行波保护电流判据不正确满足导致直流线路行波保护发生误动的事故,但以往的行波保护优化措施并未提及对电流判据的改进。以实际某特高压直流工程的EMTDC仿真平台为背景,针对目前电流判据特征量?I处理方式的不足提出了其改进后的处理方式,并对电流判据处理方式缺陷导致行波保护发生误动的机理进行了研究。在此基础上,提出了行波保护电流判据的优化策略,实行对整流侧、逆变侧不同的处理模式,结合实际特高压直流工程的仿真算例验证了该优化策略的有效性。Maloperations in traveling wave protection of UHVDC transmission line happen due to inaccurate meeting current criterion in practical operation, but the criteria are not mentioned in optimization strategy of traveling wave protection. Based on a practical UHVDC model in EMTDC, in order to remedy the defects of present ？I process mode, this paper proposed an improved approach and analyzed the mechanism of how the defects of ？I process mode led to maloperation of traveling wave protection. For this reason, the paper proposed an optimized strategy of current criterion of traveling wave protection to implement different processing modes in rectifier and inerter. Correctness and effectiveness of the new strategy were validated with simulation analysis example in an actual project of UHVDC.

关 键 词：特高压直流线路 行波保护 电流判据特征量?I 优化策略 

分 类 号：TM76[电气工程—电力系统及自动化]