基于PTC材料的短路限流保护方案及PTC限流特性研究

杨  锋<sup>1</sup>; 李 志<sup>2</sup>; 毛海涛<sup>1</sup>

引用本文:	杨锋,李志,毛海涛.基于PTC材料的短路限流保护方案及PTC限流特性研究[J].电力系统保护与控制,2007,35(12):10-14.
	YANG Feng,LI Zhi,Mao Hai-tao.Research on PTC current limiting characters and fault current protect scheme based on PTC material[J].Power System Protection and Control,2007,35(12):10-14

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基于PTC材料的短路限流保护方案及PTC限流特性研究
杨锋¹, 李志², 毛海涛
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

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。

关键词: PTC材料短路保护电阻变化特性可恢复型断路器

DOI：10.7667/j.issn.1674-3415.2007.12.003

分类号:

基金项目:湖北省自然科学基金项目（2004ABA026）

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

YANG Feng¹, LI Zhi², Mao Hai-tao

1.College of Electrical and Information Engineering, Naval University of Engineering, Wuhan 430033, China;2. Navy Representation Office in 427 Factory,Guangzhou 510336, China

Abstract:

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 application.

Key words: PTC material short-circuit protection resistance change characters resumable breaker

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