基于配电网一二次融合成套设备的接地故障处理方案研究

Research on Earthing Fault Treatment Based on Primary and Secondary Integration Technology of Distribution Network

摘要:

针对单相接地故障检测和快速隔离的难题，提出了基于配电网一二次融合技术的接地故障处理方案。方案通过一二次融合成套设备及小波包暂态零序选线技术，利用来电合闸、无压分闸、合于故障加速跳闸、故障路径优先等策略，有效解决了多分支、多供电方式下单终端选线选段的难题。同时结合现场应用案例，证明了所提方案可以快速实现接地故障区段的定位和隔离，具有普遍的适用性。

Abstract:

In order to solve the problems about the detection and quick isolation of single-phaseearthing faults in a small current grounding system, an earthing fault treatment scheme is proposed based on primary and secondary integration technology of distribution network. Through a complete set of primary and secondary fusion equipment and wavelet packet transient zero-sequence line selection technology, and combined with the use of incoming call closing, voltage free opening, closing on fault accelerated tripping, fault path priority and other strategies, the problems of single terminal line selection under multi-branch and multi-power supply modes are effectively solved. At the same time, combined with on site application cases, it is proved that the proposed scheme can quickly realize the location and isolation of ground fault zone and has universal applicability.