渝鄂直流背靠背联网工程最后断路器跳闸功能配置
|
摘要
柔性直流输电系统逆变站切除全部交流线路,甩负荷运行,会导致逆变站直流侧及其他部分电压异常升高,危及一次设备安全,因此,在逆变站中配置最后断路器跳闸功能非常必要。结合渝鄂直流背靠背联网工程,提出针对柔性直流输电系统的最后断路器跳闸功能配置方案,并基于RT-LAB实时仿真平台,接入实际控制保护系统和运行人员控制层监控系统,对所提配置方案进行验证。试验结果表明,配置最后断路器跳闸功能后,可保证在交流断路器跳开前或直流电压上升到保护定值前,柔性直流控制系统下发换流器闭锁命令,避免直流侧及交流侧严重过压。
The removal of all AC lines and load shedding of inverter station in flexible HVDC system will cause overvoltage at the DC side and other parts in inverter station, which may endanger the safety of primary equipment. Therefore, the configuration of last breaker trip function in inverter station is very necessary. In this paper, based on the Chongqing-Hubei back-to-back HVDC project, a configuration scheme of last breaker trip function for flexible HVDC system is proposed, and is verified by RT-LAB real-time simulation platform which is integrated to the control and protection system and operators monitoring system. The results show that the configuration of last breaker trip function can ensure the locking of converter valves before tripping of the AC circuit breaker or before the DC voltage increasing to the protective setting value so as to avoid serious overvoltage at both AC and DC sides.
The removal of all AC lines and load shedding of inverter station in flexible HVDC system will cause overvoltage at the DC side and other parts in inverter station, which may endanger the safety of primary equipment. Therefore, the configuration of last breaker trip function in inverter station is very necessary. In this paper, based on the Chongqing-Hubei back-to-back HVDC project, a configuration scheme of last breaker trip function for flexible HVDC system is proposed, and is verified by RT-LAB real-time simulation platform which is integrated to the control and protection system and operators monitoring system. The results show that the configuration of last breaker trip function can ensure the locking of converter valves before tripping of the AC circuit breaker or before the DC voltage increasing to the protective setting value so as to avoid serious overvoltage at both AC and DC sides.
引文
[1]姚良忠,吴婧,王志冰,等.未来高压直流电网发展形态分析[J].中国电机工程学报,2014,34(34):6007-6020.YAO Liangzhong,WU Jing,WANG Zhibing,et al.Pattern analysis of future HVDC grid development[J].Proceeding of the CSEE,2014,34(34):6007-6020.
[2]胡文旺,石吉银,唐志军,等.厦门柔性直流输电工程换流阀充电触发无源逆变试验研究[J].中国电力,2016,49(11):51-56.HU Wenwang,SHI Jiyin,TANG Zhijun,et al.Research on the converter valves charging and triggering passive inversion test of Xiamen flexible DC transmission project[J].Electric Power,2016,49(11):51-56.
[3]华文,凌卫家,黄晓明,等.舟山多端柔性直流系统在线极隔离试验[J].中国电力,2016,49(6):78-82.HUA Wen,LING Weijia,HUANG Xiaoming,et al.The online Isolation test of Zhoushan multi-terminal MMC-HVDC system.Electric Power,2016,49(6):78-82.
[4]汤广福,罗湘,魏晓光.多端直流输电与直流电网技术[J].中国电机工程学报,2013,33(10):8-17.TANG Guangfu,LUO Xiang,WEI Xiaoguang.Multi-terminal HVDC and DC-grid technology[J].Proceedings of the CSEE,2013,33(10):8-17.
[5]谢国辉,李琼慧.全球能源互联网技术创新重点领域及关键技术[J].中国电力,2016,49(3):18-23.XIE Guohui,LI Qionghui.Important fields and key technologies of innovation for global energy interconnection[J].Electric Power,2016,49(3):18-23.
[6]赵倩,张群,严兵,等.柔性直流输电系统控制策略及动模试验[J].电力建设,2015,36(12):57-62.ZHAO Qian,ZHANG Qun,YAN Bing,et al.Control strategy and dynamic simulation test of VSC-HVDC system[J].Electric Power Construction,2015,36(12):57-62.
[7]王华伟,蒋卫平,吴娅妮,等.云广±800 k V特高压直流工程逆变站最后断路器跳闸故障研究[J].电网技术,2008,32(18):6-13.WANG Huawei,JIANG Weiping,WU Yani,et al.Study on last break trip fault of inverter station in±800 k V UHVDC project from Yunan to Guangdong[J].Power System Technology,2008,32(18):6-13.
[8]许卫刚,张志宏,单哲,等.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.XU Weigang,ZHANG Zhihong,SHAN Zhe,et al.Analysis of the last breaker protection in UHVDC and conventional HVDC projects[J].Jiangsu Electric Engineering,2010,29(5):6-10.
[9]张婷,蒲永红.高压直流输电系统两种最后断路器跳闸保护比较[J].上海工程技术大学学报,2011,25(2):151-153.ZHANG Ting,PU Yonghong.Comparison between two kinds of last breaker trip protection in HVDC system[J].Journal of Shanghai University of Engineering Science,2011,25(2):151-153.
[10]刘云,王明新,曾南超.高压直流输电系统逆变站最后断路器跳闸装置配置原则[J].电网技术,2006,30(6):35-40.LIU Yun,WANG Mingxin,ZENG Nanchao.Configuration principle of last breaker trip equipment in inverter station of HVDC[J].Power System Technology,2006,30(6):35-40.
[11]国网北京经济技术研究院.渝鄂直流背靠背联网工程设备技术规范[S].2016.
[2]胡文旺,石吉银,唐志军,等.厦门柔性直流输电工程换流阀充电触发无源逆变试验研究[J].中国电力,2016,49(11):51-56.HU Wenwang,SHI Jiyin,TANG Zhijun,et al.Research on the converter valves charging and triggering passive inversion test of Xiamen flexible DC transmission project[J].Electric Power,2016,49(11):51-56.
[3]华文,凌卫家,黄晓明,等.舟山多端柔性直流系统在线极隔离试验[J].中国电力,2016,49(6):78-82.HUA Wen,LING Weijia,HUANG Xiaoming,et al.The online Isolation test of Zhoushan multi-terminal MMC-HVDC system.Electric Power,2016,49(6):78-82.
[4]汤广福,罗湘,魏晓光.多端直流输电与直流电网技术[J].中国电机工程学报,2013,33(10):8-17.TANG Guangfu,LUO Xiang,WEI Xiaoguang.Multi-terminal HVDC and DC-grid technology[J].Proceedings of the CSEE,2013,33(10):8-17.
[5]谢国辉,李琼慧.全球能源互联网技术创新重点领域及关键技术[J].中国电力,2016,49(3):18-23.XIE Guohui,LI Qionghui.Important fields and key technologies of innovation for global energy interconnection[J].Electric Power,2016,49(3):18-23.
[6]赵倩,张群,严兵,等.柔性直流输电系统控制策略及动模试验[J].电力建设,2015,36(12):57-62.ZHAO Qian,ZHANG Qun,YAN Bing,et al.Control strategy and dynamic simulation test of VSC-HVDC system[J].Electric Power Construction,2015,36(12):57-62.
[7]王华伟,蒋卫平,吴娅妮,等.云广±800 k V特高压直流工程逆变站最后断路器跳闸故障研究[J].电网技术,2008,32(18):6-13.WANG Huawei,JIANG Weiping,WU Yani,et al.Study on last break trip fault of inverter station in±800 k V UHVDC project from Yunan to Guangdong[J].Power System Technology,2008,32(18):6-13.
[8]许卫刚,张志宏,单哲,等.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.XU Weigang,ZHANG Zhihong,SHAN Zhe,et al.Analysis of the last breaker protection in UHVDC and conventional HVDC projects[J].Jiangsu Electric Engineering,2010,29(5):6-10.
[9]张婷,蒲永红.高压直流输电系统两种最后断路器跳闸保护比较[J].上海工程技术大学学报,2011,25(2):151-153.ZHANG Ting,PU Yonghong.Comparison between two kinds of last breaker trip protection in HVDC system[J].Journal of Shanghai University of Engineering Science,2011,25(2):151-153.
[10]刘云,王明新,曾南超.高压直流输电系统逆变站最后断路器跳闸装置配置原则[J].电网技术,2006,30(6):35-40.LIU Yun,WANG Mingxin,ZENG Nanchao.Configuration principle of last breaker trip equipment in inverter station of HVDC[J].Power System Technology,2006,30(6):35-40.
[11]国网北京经济技术研究院.渝鄂直流背靠背联网工程设备技术规范[S].2016.