| 两起高压直流输电系统保护动作事件分析及对策 |
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| 引用本文： | 姚其新,黎恒烜.两起高压直流输电系统保护动作事件分析及对策[J].电力系统自动化,2016,40(23):163-167. |
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| 作者姓名： | 姚其新 黎恒烜 |
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| 作者单位： | 国网湖北省电力公司检修公司, 湖北省武汉市430050,国网湖北省电力公司电力科学研究院, 湖北省武汉市 430077 |
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| 摘 要： | 高压直流输电系统单极运行时,中性母线电压过高会影响系统正常运行。介绍了一起由感应电压导致的同塔双回直流输电系统单极运行时的大地回线转换开关保护动作事件和一起由换相失败引发的换流器差动保护动作事件。文中对这两起事件保护动作过程进行了全面的分析并提出了改进措施以避免相同类型故障的再次发生。通过现场试验和实际运行情况验证了措施的有效性。
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| 关 键 词： | 高压直流输电系统 同塔双回线 单极运行 继电保护 事故分析 |
| 收稿时间： | 2016/1/23 0:00:00 |
| 修稿时间： | 2016/10/17 0:00:00 |
Analysis and Handling Methods of Two Protection Action Events in HVDC Transmission Systems |
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| YAO Qixin and LI Hengxuan.Analysis and Handling Methods of Two Protection Action Events in HVDC Transmission Systems[J].Automation of Electric Power Systems,2016,40(23):163-167. |
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| Authors: | YAO Qixin and LI Hengxuan |
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| Affiliation: | Maintenance Company of State Grid Hubei Electric Power Company, Wuhan 430050, China and Electric Power Research Institute of State Grid Hubei Electric Power Company, Wuhan 430077, China |
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| Abstract: | Over-high neutral bus voltage will affect the normal operation of a high voltage direct current(HVDC)transmission system, especially when the system is in monopolar operation condition. This paper describes an event of ground return transfer switch protection action caused by induction voltage when one of the double-circuit DC transmission systems is in monopolar operation condition and an event of converter differential protection action caused by commutation failure. To avoid recurrence of similar accidents, an overall analysis is made on the protection action process of two events and improving measures are put forward. Validity of the improving measures is proved by the test and actual operations. |
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| Keywords: | high voltage direct current(HVDC)transmission system double-circuit transmission line on the same tower monopolar operation relay protection fault analysis |
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