船舶中压直流系统接地保护研究  

Research on Grounding Fault Protection for Shipboard Medium Voltage DC System

作　　者：靳攀峰[1] 毕大强[2] 孟遂民[1] 

机构地区：[1]三峡大学,湖北宜昌443002 [2]清华大学,北京100084

出　　处：《船电技术》2013年第5期4-7,共4页Marine Electric & Electronic Engineering

基　　金：三峡大学硕士学位论文培优基金(2012PY037)

摘　　要：由于船舶中压直流电网的特殊性,现有差动保护和变流器保护不能满足整个系统保护的可靠性要求。本文以一种船舶中压直流系统为例,研究了中性点高阻接地方式的接地故障特性,分析了差动保护方案和变流器保护的不足,提出了通过电子式电流互感器进行测量的零序差动和特征频率电压接地保护方案,提高了保护灵敏度。通过SIMULINK仿真分析验证了该保护方法具有可行性。Because of the particularity of the shipboard medium voltage DC power grid, differential and inverter protection can not meet the reliability requirements of total system protection. Based on a shipboard medium voltage DC system, grounding fault characteristics of the neutral point grounding by the high resistance is researched, and the disadvantage of differential protection and inverter protection is analyzed, thus the grounding protection scheme of the zero sequence differential protection and the characteristic frequency voltage protection via electronic current transformer （ECT） are proposed, and the sensitivity of protection is improved in this method. The simulation analysis validates the feasibility of protection methods by SIMULINK.

关 键 词：船舶 中压直流系统 接地故障 差动保护 

分 类 号：TM744[电气工程—电力系统及自动化]