Electric Power Research Institute of State Grid Shanxi Electric Power Company
Shanxi Key Laboratory of Power System Operation and Control, Taiyuan University of Technology

【目的】随着分布式电源(distributedgenerator,DG)在传统配电网的不断接入,给配电网保护配置带来了严峻的挑战。为应对这一问题,对配电网线路故障时,不同类型DG的故障电流幅相特性进行了分析,在此基础上提出了一种基于故障序电流幅相特性的配电网纵联保护方案。【方法】该方案利用线路两端的各序故障电流幅值和相位差特征,分别构造保护动作量及制动量。通过合理设置保护参数来应对不同类型DG接入下,新型配电网继电保护选择性、灵敏性所面临的问题。【结果】通过RTDS搭建仿真算例进行了方案验证,结果表明,该方案整定简单,无需在运行阶段对保护阈值实时调整,对设备算力要求较低的同时具有良好的动作性能。

【Purposes】 With the continuous access of distributed generator (DG) in the tradi-tional distribution network, it has brought serious challenges to the distribution network protec-tion configuration. Based on the analysis of the amplitude and phase characteristics of different types of DG fault current in distribution network line fault, this paper proposes a distribution network pilot protection scheme based on the amplitude and phase characteristics of fault se-quence current. 【Methods】 The scheme uses the amplitude and phase difference characteristics of each sequence fault current at both ends of the line to construct the protection action amount and braking amount respectively. By setting the protection parameters reasonably, the selectivity and sensitivity of complex distribution network protection with different types of DG can be taken in-to account. 【Findings】 The protection scheme setting is simple, real-time adjustment is not re-quired at the operation stage, and the computational power of the protection equipment is low. Finally, the effectiveness of the protection scheme is verified by a simulation example built by RTDS.

山西省科技重大专项资助项目(20181102028);国网山西省电力公司科技项目(520530200014)

杨洋,李胜文,陈晓乾,等.基于故障序电流幅相特性的含分布式电源配电网纵联保护方案[J].太原理工大学学报,2024,55(1):93-101.

YANG Yang,LI Shengwen,CHEN Xiaoqian,et al.Longitudinal protection scheme for distribution network with distributed power based on amplitude and phase characteristics of fault sequence current[J].Journal of Taiyuan University of Technology,2024,55(1):93-101.