电力系统自动化2017，Vol.41Issue(19)：89-94,146,7.DOI:10.7500/AEPS20170331005
基于直流电抗器电压的多端柔性直流电网边界保护方案
Boundary Protection Scheme for Multi-terminal Flexible DC Grid Based on Voltage of DC Reactor
摘要
Abstract
Fast and reliable DC fault detection is one of the key techniques to break through for multi-terminal flexible DC grid.According to the characteristics of the DC reactors on the line,a novel boundary protection scheme is proposed to quickly detect the fault line using the voltage magnitude and direction of the DC reactors.And the fault type and fault pole can be judged with the difference in the voltage of DC reactor between the positive and negative poles of the fault line.The scheme can provide fast DC fault detection and identification just by the voltage of the single-ended DC reactor,thereby meeting the protection requirement of the DC grid while simplifying implementation.For the local fault detection of the proposed scheme,no telecommunication is needed.A three-terminal flexible DC grid model is built in PSCAD/EMTDC for simulation results to demonstrate the effectiveness of the scheme proposed under different DC faults and operating conditions.关键词
多端柔性直流电网/边界保护/直流电抗器电压/故障识别Key words
multi-terminal flexible DC grid/boundary protection/DC reactor voltage/fault identification引用本文复制引用
周家培,赵成勇,李承昱,许建中,安婷..基于直流电抗器电压的多端柔性直流电网边界保护方案[J].电力系统自动化,2017,41(19):89-94,146,7.基金项目
国家电网公司“千人计划”科技专项(SGRIzlsdgcjsyjsJS[2014]264).This work is supported by "Thousands of People Plan" Special Support Project of State Grid Corporation of China (No.SGRIzlsdgcjsyjsJS[2014]264). （SGRIzlsdgcjsyjsJS[2014]264）
