| 特高压直流与常规直流工程最后断路器保护浅析 |
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| 引用本文： | 许卫刚,张志宏,单哲,査申森,汪道勇.特高压直流与常规直流工程最后断路器保护浅析[J].江苏电机工程,2010,29(5):6-10. |
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| 作者姓名： | 许卫刚 张志宏 单哲 査申森 汪道勇 |
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| 作者单位： | [1]常州供电公司,江苏常州213003 [2]江苏省电力设计院,江苏南京211102 [3]国网运行分公司,上海201708 |
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| 摘 要： | 为防止逆变站交流系统甩负荷后引起的严重过电压,通常会在逆变站安装最后断路器保护。在±800 kV向家坝-上海直流工程中,ABB公司采用了不同于常规直流的最后断路器保护设计理念。从保护信号采集、保护逻辑、存在隐患等方面,阐述了特高压直流和常规直流中的最后断路器保护,并进行了对比分析。指出了常规直流最后断路器保护在设计上的局限性以及特高压直流最后断路器保护在运行中可能存在的问题,并提出了改进意见。该研究有助于提高现有直流工程的运行可靠性,并对将要投产的特高压直流工程的运行维护工作有一定指导意义。
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| 关 键 词： | 特高压直流 常规直流 最后断路器保护 过电压 |
Analysis of the Last Breaker Protection in UHVDC and Conventional HVDC Projects |
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| XU Wei-gang,ZHANG Zhi-hong,SHAN Zhe,ZHA Shen-sen,WANG Dao-yong.Analysis of the Last Breaker Protection in UHVDC and Conventional HVDC Projects[J].Jiangsu Electrical Engineering,2010,29(5):6-10. |
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| Authors: | XU Wei-gang ZHANG Zhi-hong SHAN Zhe ZHA Shen-sen WANG Dao-yong |
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| Affiliation: | 1.Changzhou Power Supply Company,Changzhou 213003,China;2.Jiangsu Electric Power Design Institute,Nanjing 211102,China;3.State Grid Operation Company,Shanghai,201708,China) |
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| Abstract: | The last breaker protection is usually installed in inverter station against the severe over-voltage caused by load shedding of AC system.A new last breaker protection design concept different from convention is adopted by ABB in ± 800kV Xiangjiaba-Shanghai UHVDC project.The comparative analysis of the last breaker protection in UHVDC and conventional HVDC projects is pursued with protection signal acquisition,protection logic,safety hazard etc.The limits of the last breaker protection designed in HVDC project and problems possibly occur in UHVDC project are pointed out.Finally,the corresponding suggestion is also presented.The study is helpful to improve the reliability of existing HVDC projects,and is useful for the operation and maintenance of future UHVDC projects. |
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| Keywords: | UHVDC HVDC the last breaker protection overvoltage |
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