基于电流行波极性的高压直流极母线保护.PDF

智能电网 Smart Grid 27卷 3期 电网与清洁能源 Vol.27 No.3 20 11年3月 Power System and Clean Energy Mar. 2011 文章编号：1674-3814（2011 ）03-0042-04 中图分类号：TM7 11 献标志码： A 于电流行波极性的高压直流极母线保护 1 2 孙刚 宗芝荣 , 1.山东理工大学 电气与电子工程学院，山东淄博255049;2.淮北供电公司，安徽 淮北235000) HVDC Bus-Bar Protection Based on Polar of Current Traveling Waves 1 2 SUN Gang , ZONG Zhi-rong 1. School of Electrical and Electronic Engineering, Shandong University of Technology, Zibo 255049, Shandong Province, China; 2. Huaibei Power Supply Company, Huaibei 235000, Anhui Province, China ) ： ABSTRACT Large transient unbalance current may occur on 超过7 000 km ，该2项指标均成为世界 一。这也 the HVDC pole bus-bar differential protection when an internal 对直流系统的保护提出了更严格的要求。 fault hits, which causes the malfunction of the protection 极母线是高压直流输电系统（HVDC ）连接阀厅 system. This paper presents the working principle of the 出线和直流线路的重要装置。其保护也应快速准确 protection of HVDC pole bus-bar based on the polar of initial current traveling waves, and this protection can entirely 地反应出母线的区内和区外故障，保证系统的安全 eliminate all the differential protection malfunctions caused by 稳定运行。目前，直流极母线采用的是电流差动保 the unbalanced current as it can identify the internal fault and 护算法。该方法存在的主要缺陷还是如 躲避不平 external fault of the pole bus-bar throug