| 防止WMZ-41A母差保护装置启动失灵保护误动的改进 |
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| 引用本文： | 张龙,蔡杰,李生龙. 防止WMZ-41A母差保护装置启动失灵保护误动的改进[J]. 电力建设, 2007, 28(5): 42-43 |
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| 作者姓名： | 张龙 蔡杰 李生龙 |
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| 作者单位： | 西北电网公司西宁输变电运行工区,青海省西宁市,810000 |
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| 摘 要： | 针对WMZ-41A型330kV母差保护装置启动失灵保护易误动的情况,通过分析对其逻辑保护回路做了改进,保证了只有在主从机同时有"失灵开入"时,保护装置才会动作出口,只有1组失灵开入时,失灵保护不出口,只发报警信号,提高了保护装置运行的可靠性和稳定性.
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| 关 键 词： | 母差保护装置 断路器失灵保护 回路改造 |
| 文章编号： | 1000-7229（2007）05-0042-02 |
| 修稿时间： | 2006-12-12 |
Improvement on Preventing Start Failure and Misoperation of WMZ-41A Bus Bar Differential Protection Device |
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| ZHANG Long,CAI Jie,LI Sheng-long. Improvement on Preventing Start Failure and Misoperation of WMZ-41A Bus Bar Differential Protection Device[J]. Electric Power Construction, 2007, 28(5): 42-43 |
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| Authors: | ZHANG Long CAI Jie LI Sheng-long |
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| Affiliation: | Xining Electric Power Transmission and Transformation District, Xining 810000, China |
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| Abstract: | To solve the start failure and misoperation problems of the WMZ-41A 330kV bus bar differential protection device,current paper modifies the protection logic circuit to ensure that the protection device is only activated when both main and auxiliary machines have failure signals.However,if there is only one set of failure signal,the protection device will only send alarm signals without activating protection device.This improves the reliability and stability of the protection devices. |
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| Keywords: | bus bar differential protection device circuit breaker failure protection circuit upgrade |
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