电网技术2016，Vol.40Issue(8)：2541-2547,7.DOI:10.13335/j.1000-3673.pst.2016.08.042
交直流混联电网自适应交流过电压保护方案的研究
Research of New Scheme of Adaptive Overvoltage Protection in Hybrid AC/DC Grid
摘要
Abstract
Aiming at problem of absence of effective coordination between AC side overvoltage protection and DC control strategy and taking DC system single pole blocking leading abrupt power reduction as example,this paper analyzes filter action strategy and change rate of active and reactive power respectively after single pole blocking failure.Then a new principle of an adaptive AC overvoltage protection is put forward.With single pole blocking in DC system,considering equipment insulation level,the proposed scheme can adaptively adjust overvoltage protection time settings without changing original protection characteristics.It can slid over filter clearing time and prevent load loss caused by AC overvoltage protection action.When overvoltage is caused by AC grid disturbance,it can operate correctly according to original logic and ensure equipment safety.Simulation results show that this new scheme can strengthen protective relay coordination between AC and DC systems,and thus of great importance in improving hybrid system stability.关键词
交直流混联系统/单极闭锁/过电压保护/自适应保护/功率变化率Key words
hybrid AC/DC grid/single pole blocking/overvoltage protection/adaptive protection/power change rate分类
信息技术与安全科学引用本文复制引用
焦在滨,金吉良,行武,王钊..交直流混联电网自适应交流过电压保护方案的研究[J].电网技术,2016,40(8):2541-2547,7.基金项目
国家自然科学基金项目资助(51377129).Project Supported by National Natural Science Foundation of China (51377129). （51377129）
