电测与仪表2017，Vol.54Issue(6)：37-43,7.
基于用户自定义特征的反时限有源配网保护方案
User-defined characteristics based inverse timing protection scheme for active distribution network
摘要
Abstract
The access of distributed generations adds new sources to distribution network, which changes the grid structure.The traditional inverse-time overcurrent protection scheme is difficult to satisfy the requirements of selectivity and speed because of randomness and fluctuation of DG's output power.The digital inverse time overcurrent relay was considered here and a new protection scheme of inverse-time overcurrent protection based on user-defined characteristics was proposed in this paper.The proposed protection scheme considers the two relay characteristics constants(A、B) and picks up current, time multiplier setting as continuous variable settings that can be adjusted.The main objective is to minimize the overall time of operation of relays considering the minimum fault current.Four parameters are optimized by using interior-point method to achieve the optimal configuration of the protection.It makes protective relays act instantaneously when fault occurs at line exit end and satisfies the requirements of selectivity and speed.Finally, verification of the protection scheme is carried out by simulation analysis.关键词
有源配电网/分布式电源/用户自定义特征/参数优化/反时限过流保护Key words
active distribution network/DG/user-defined characteristics/parameter optimization/inverse time overcurrent relays分类
信息技术与安全科学引用本文复制引用
李嘉恒,任惠,师璞,孙辰军,王飞..基于用户自定义特征的反时限有源配网保护方案[J].电测与仪表,2017,54(6):37-43,7.基金项目
河北省电力公司科技项目(SGTYHT/13-JS-175) （SGTYHT/13-JS-175）
河北省科技支撑计划重点项目(12213913D) （12213913D）
