摘要
针对煤矿高压防爆开关综合保护装置主要存在的短路故障越级跳闸和漏电保护动作不准确的问题进行了深入的研究。提出了利用微机保护的通讯闭锁功能来解决短路故障越级跳闸问题的新方法;针对煤矿电网中性点接地方式不同和消弧线圈控制方式的不同,提出了分别利用导纳法、电导法和导纳增量法的分类漏电保护原理来实现漏电保护。实验和现场一年多的运行证明,利用上述原理设计的高压防爆开关综合保护装置具有防止短路故障越级跳闸、漏电保护动作准确、适应性强等的特点,基本解决了现有保护存在的问题,具有较高的推广价值。
This paper conducts a thorough research to the problem of short circuit override trip and inaccurate leakage protection action mainly existing in HV flameproof switchgear comprehensive protection. A method of using communication atresia of microcomputer protection to solve the problem of short circuit override trip is put forward. Moreover, it puts forward classification leakage protection principle respectively using mobility method, conductivity method and admittance increment method to realize leakage protection, according to the differences of neutral grounding mode and arc suppression coil control mode in coal mine power network. Proved by experiments and practical application for more than one year, this comprehensive protection of HV flameproof switchgear designed by above-mentioned principle which has the characteristic of preventing short circuit override trip, accurate leakage protection action and strong adaptability etc, basically solves many problems in existing protection and has high value of promotion.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2009年第24期137-141,共5页
Power System Protection and Control
关键词
漏电保护
越级跳闸
综合保护
高压防爆开关
DSP
leakage protection
override trip
comprehensive protection
HVexplosion-proofswitch
DSP
