高电压技术2011，Vol.37Issue(9)：2280-2287,8.
低压微网接地型式选择和中性线环流抑制
Earthing Arrangement and Neutral Conductor Circulating Current Suppression for Low-voltage Microgrid
摘要
Abstract
Microgrid is a cluster of distributed generations and loads as well as storage.To ensure safety of equipment and human,microgrid should be properly earthed.Focussing on low voltage microgrid,we investigated domestic and international standards on earthing,analyzed the characteristics of TN,TT and IT earthing system,and summaried the principle of employing earthing system for microgrid.Moreover,we analyzed the electromagnetic compatibility（EMC） and the stray current problem.With regardto the circulating current aroused by parallel distributed generations,we proposed a remedy that distributed generation provides phase wires while a transformer with low zero sequence impedance provides the neutral wires.With respect to the neutral voltage displacement,we adopted theoretical analysies and simulations to confirm the feasibility.Furthermore,we presented and discussed some doubtful problems of the involved domestic standards including additional earthing and earthing sharing,and provided the revised suggestions.关键词
微网/低压电网/接地/杂散电流/环流/标准Key words
microgrid/low-voltage network/earthing/stray current/circulating current/standard分类
信息技术与安全科学引用本文复制引用
程军照,李澍森,陈江波,卢文华,张海龙..低压微网接地型式选择和中性线环流抑制[J].高电压技术,2011,37(9):2280-2287,8.基金项目
国家电网公司科技项目 （）
