| 断路器三相不一致保护误动原因分析及对策 |
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| 引用本文： | 刘秋英,邱宏明,李强.断路器三相不一致保护误动原因分析及对策[J].江苏电器,2012(7):34-37. |
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| 作者姓名： | 刘秋英 邱宏明 李强 |
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| 作者单位： | 广东电网公司佛山供电局 |
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| 摘 要： | 针对一起220kV线路断路器发生的误跳闸事件,根据该线路故障录波示意图及现场情况,结合断路器三相不一致保护的原理,得出误动原因是断路器本体三相不一致保护时间继电器异常造成的。针对该缺陷,提出了防范其误动的措施及两种改进方案,提高三相不一致保护动作可靠性,有效保障电网安全稳定运行。
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| 关 键 词： | 断路器 三相不一致保护 误动 时间继电器 非全相运行 |
Malfunction Causes Analysis of Circuit-Breaker Three-Phase Inconsistent Protection and Countermeasures |
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| Authors: | LIU Qiu-ying QIU Hong-ming LI Qiang |
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| Affiliation: | (Foshan Power Supply Bureau, Guangdong Power Grid Corp, Foshan 528000, China) |
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| Abstract: | In allusion to a false-tripping event of 220kV line circuit breaker and according to the line fault record waves schematic diagram and site situations, combined with circuit-breaker three-phase inconsistent protection principle, this paper concluded that the time relay abnormity of circuit-breaker three-phase inconsistent protection caused malfunction. Aiming at the defect, this paper raised countermeasures for malfunction and two kinds of improved schemes, which raised the reliability of three-phase inconsistent protection and ensured power grid in safe and stable operation effectively. |
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| Keywords: | circuit breaker three-phase inconsistent protection malfunction time relay open-phase operation |
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