基于时空特性的直流线路保护性能分析方法  

Analysis method of DC line protection performance based on time-space characteristics

作　　者：李建辉 王波 刘垒 刘世明[3] LI Jianhui;WANG Bo;LIU Lei;LIU Shiming(State Grid Tangshan Power Supply Company,Tangshan,Hebei 063000;NR Electric Co.,Ltd,Nanjing 211100;Key Laboratory of Intelligent Power Dispatching and Control of Ministry of Education(Shandong University),Ji’nan 250061)

机构地区：[1]国网唐山供电公司,河北唐山063000 [2]南京南瑞继保电气有限公司,南京211100 [3]电网智能化调度与控制教育部重点实验室(山东大学),济南250061

出　　处：《电气技术》2022年第8期41-45,52,共6页Electrical Engineering

基　　金：国家自然科学基金(51677108)。

摘　　要：由于传统的直流线路保护性能分析方法存在无法全方面展现直流线路保护特性的缺陷,本文在深入分析现有保护方案的基础上,提出一种基于时空特性的直流线路保护性能分析方法。该方法综合考虑保护在不同故障距离、不同故障过渡电阻下的动作时间,旨在使不同保护方案的性能得到更直观清晰全面的呈现。通过PSCAD/EMTDC仿真平台对现有直流线路单端量保护、纵联保护,以及直流线路保护系统进行仿真分析,验证本文所提方法在分析不同直流线路保护动作特性方面的优势,为直流线路保护优化提供方向。Since the traditional DC line protection analysis method has the defect that it cannot fully show the characteristics of DC lines protection.Based on the in-depth analysis of the existing protection schemes,this paper proposes a protection performance analysis method based on time-space characteristics(TSC).The action time of protection under different fault distances and different fault transition resistances is comprehensively considered,aiming to understand the performance of different protection schemes intuitively,clearly and comprehensively.The PSCAD/EMTDC simulation platform is used to analyze the non-unit protection,unit protection and protection system of the DC line.It is verified that this method has great advantages in reflecting the action characteristics of different DC line protections and provides direction for the optimization of DC line protection.

关 键 词：高压直流(HVDC) 线路保护 时空特性 保护性能分析 故障距离 故障过渡电阻 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM773