电力系统自动化2017，Vol.41Issue(17)：87-93,133,8.DOI:10.7500/AEPS20170228003
基于自定义差分电流的MMC-HVDC输电线路纵联保护
Pilot Protection for MMC-HVDC Transmission Line Based on Custom Difference Current
摘要
Abstract
In order to improve the reliability of fault detection and fault line selection for modular multilevel converter based high voltage direct current (MMC-HVDC) transmission line, a novel pilot protection principle is proposed.Based on the characteristics of the MMC-HVDC system, custom difference current (named CDC-BPN) between the positive pole at one terminal and the negative pole at the other is constructed and used for voltage and current protection.The analysis shows that the absolute value of CDC-BPN for DC line faults is obviously higher than that of normal operation condition and AC system faults.In addition, the sign (positive or negative) of CDC-BPN for positive pole-to-ground fault, negative pole-to-ground fault and pole-to-pole fault is obviously different.According to these characteristics, a pilot protection criterion is constructed to recognize DC line faults and fault line.Simulation results show that the proposed protection is able to detect DC line fault under different fault conditions and select the fault line quickly and reliably.关键词
模块化多电平换流器型高压直流/直流输电线路/纵联保护/自定义差分电流Key words
modular multilevel converter based high voltage direct current (MMC-HVDC)/DC transmission line/pilot protection/custom difference current引用本文复制引用
宁连营,邰能灵,郑晓冬,黄文焘..基于自定义差分电流的MMC-HVDC输电线路纵联保护[J].电力系统自动化,2017,41(17):87-93,133,8.基金项目
国家自然科学基金资助项目(51407115) （51407115）
国家重点研发计划资助项目(2016YFB0900601).This work is supported by National Natural Science Foundation of China (No.51407115) and National Key Research and Development Program of China (No.2016YFB0900601). （2016YFB0900601）
