舰船复杂树型电网新型保护方法的研究

Study of a new complex tree-structure network protection in shipboard

分析了我国舰船树型电网现有的电流原则和时间原则对大电网保护的不可靠性,通过研究舰船树型电网发生短路故障时的电流特征,依靠电网上下级保护开关的故障电流特征进行综合逻辑判断,达到对舰船树型电网的保护,同时考虑了用电流方向判断装置来解决馈电流误动作问题。

This paper discusses the current principle and time principle of complex tree-structure network in domestic shipboard at present. Based on the study of current characteristics of complex tree-structure network, the paper employs the one protective switch and the lower switch's fault current characteristics to get the comprehensive logic judgement to protect the complex tree-structure network in shipboard. This paper also presents the method of using the feedback current's direction to solve maloperation by feedback current.