基于逻辑时序的选线装置和馈线自动化终端配合风险研究

Study on the Match Risk Between the Line Selection Device and the Feeder Terminal Unit Based on Logic Time Sequence

在复杂接地故障下,新型小电流接地选线装置选线轮切逻辑与就地型馈线自动化终端逻辑时序失配,导致故障线路断路器多次分合闸。针对此问题,本文基于小电流接地选线装置和馈线自动化终端的技术原理,结合事故案例对选线装置与馈线终端失配风险等进行分析,提出小电流接地选线装置与馈线自动化终端配合原则,并在部分地市局进行试点应用。应用结果表明,所提原则提升了选线装置与馈线终端的适配能力。

There are time sequence mismatches between the logics of the small current grounding line selection device and the local type feeder terminal unit for complex grounding faults,which cause multiple opening and closing operations of the circuit breakers of faulty lines.Aimed at solving the problem,the risk of mismatch between the line selection device and the feeder terminal unit is analyzed based on case study and the technical principles of small current grounding line selection device and feeder terminal unit.The match principles between the small current grounding line selection device and the feeder terminal unit are proposed and applied experimentally in power supply bureaus of some cities.Application results show that the proposed principles improve the match capability between the line selection device and the feeder terminal unit.