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一起断路器三相不一致保护误动事件的分析及改进

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通过对一起220 kV主变断路器本体三相不一致保护误动事件的分析,发现了断路器三相不一致保护回路中延时继电器绝缘强度不够的缺陷,并针对如何提高断路器本体三相不一致保护动作的安全性和可靠性,提出了相应的改进措施.
Analysis and Improvement of Three-Phase Inconsistent Protection Misoperation Accident for Circuit Breaker
This paper analyzes the 220kV transformer circuit breaker three-phase inconsistent protection misoperation,and finds out the accident is due to the deficient insulation strength of the delay relay in the protection circuit.Then the corresponding measures are presented in order to improve the safety and reliability of three-phase inconsistent protection operation.

three-phase inconsistent protectionprotection misoperationinsulationtime-delay relay

包雪铭、吴刚、许洁

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无锡供电公司,江苏无锡214061

三相不一致保护 保护误动 绝缘 延时继电器

2014

华东电力
华东电力试验研究院有限公司

华东电力

CSTPCD
影响因子:0.551
ISSN:1001-9529
年,卷(期):2014.42(12)
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