基于PTC材料的短路限流保护方案及PTC限流特性研究  

Research on PTC current limiting characters and fault current protection scheme based on PTC material

作　　者：杨锋[1] 李志[2] 毛海涛[1] 

机构地区：[1]海军工程大学电气与信息工程学院,湖北武汉430033 [2]海军驻427厂军事代表室,广东广州510715

出　　处：《继电器》2007年第12期10-14,共5页Relay

基　　金：湖北省自然科学基金项目(2004ABA026)

摘　　要：分析了现有电力系统短路限流保护技术在低压独立电力系统中应用存在的问题,提出了一种基于PTC材料的可恢复型断路器的拓扑结构并说明其工作原理;完成了PTC热敏电阻应用于蓄电池组电源短路限流的试验测试,给出了不同电流下PTC材料电阻变化过程的试验结果,并对于将PTC材料应用于短路限流保护的电阻变化特性进行了分析,试验表明,应用该拓扑结构限流效果显著,具有良好的应用前景。This paper analyses the problem of existing fault current limiting technology＇s application in low-voltage independency power systems. A topology scheme of resumable breaker based on PTC heat-sensitive resistance is put forward and its working principle is explained. The fault current limiting device based on PTC heat-sensitive resistance is tested with the accumulator source and the testing results is presented. The resistance change characters of PTC material applying in fault current limiting is analyzed. Testing results shows that the PTC material which can limit the fault current effectively has a nice prospect of applicantion.

关 键 词：PTC材料 短路保护 电阻变化特性 可恢复型断路器 

分 类 号：TM771[电气工程—电力系统及自动化] TM713