基于故障自愈及录波技术的站用直流电源系统

Substation DC Power Supply System Based on Fault Self-healing and Wave Recording Technology

针对变电站直流电源系统抵御故障风险能力低、事后故障分析困难的现状,提出了分段直流母线失压主动补偿、交流侵入直流支路自动切除、故障蓄电池在线隔离等典型的故障治理方法,并研究了变电站直流电源系统故障多判据智能录波以及事故分级告警技术,给出了事故分级告警方案。在此基础上,开发了一套具有典型故障自愈及故障录波功能的高安全型直流电源系统,实现了直流电源系统典型故障的自动治理和故障原因的可追溯。经河北南部电网变电站实际工程应用,验证了所开发系统的有效性和实用性。

Aiming at the problems of low ability to withstand fault risk and difficulty in post fault analysis of DC power supply system in substation,some typical fault treatment methods are proposed,such as active compensation for voltage loss of sectional DC bus,automatic removal of AC invaded DC branch,and online isolation of fault battery.The multi criteria intelligent recording of DC power supply system fault and the fault classification alarm technology are studied,the fault classification alarm scheme is given.On this basis,one set of high safety DC power supply system with typical fault self-healing and fault recording functions is developed,it realized the automatic treatment of typical faults of DC power supply system and the traceability of fault causes.The effectiveness and practicability of the system are verified by the practical engineering application of the substation in the Southern Hebei Power Grid.