高压直流工程熄弧角测量异常引发换相失败故障的分析与处理
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摘要
南方电网某直流工程在调试期间发生了数次换相失败故障,对交直流都产生了较大的影响。对换相失败时的故障录波数据进行分析,推断换相失败原因为熄弧角测量系统偶发故障而引起直流控制系统误动,基于此推断在该直流工程的详细PSCAD模型中进行了模拟,对该故障进行了仿真复现,验证了故障原因分析的正确性。为解决熄弧角测量装置偶发异常的问题,提出在直流控制系统内增加防误逻辑环节屏蔽熄弧角测量异常的影响,并用PSCAD/EMTDC仿真验证了该处理方案的效果,仿真结果和实际运行表明所提解决方案对熄弧角测量异常问题是有效的,确保了高压直流系统的正常稳定运行。
Several commutation failures occurred during commissioning of a HVDC project in China Southern Power Grid,which had a great impact on both AC and DC power systems. The transient fault recording data during the commutation failure is analyzed. It is concluded that the reason of the commutation failure is the malfunction of the HVDC control system caused by the accidental failure of the extinguishing angle measurement system. Based on this inference,the detailed PSCAD model of the HVDC project is established,and the fault is simulated and reproduced,which verifies the correctness of the fault cause analysis. In order to resolve the occasional abnormality of the extinction angle measuring device,an anti-error logic link is added in the control system to shield the abnormality of the extinction angle measurement. The effect of the proposed solution is verified by PSCAD/EMTDC simulation,simulative results and actual operation show that the proposed solution is effective for abnormal measurement of extinction angle and ensures safe and stable operation of HVDC system.
Several commutation failures occurred during commissioning of a HVDC project in China Southern Power Grid,which had a great impact on both AC and DC power systems. The transient fault recording data during the commutation failure is analyzed. It is concluded that the reason of the commutation failure is the malfunction of the HVDC control system caused by the accidental failure of the extinguishing angle measurement system. Based on this inference,the detailed PSCAD model of the HVDC project is established,and the fault is simulated and reproduced,which verifies the correctness of the fault cause analysis. In order to resolve the occasional abnormality of the extinction angle measuring device,an anti-error logic link is added in the control system to shield the abnormality of the extinction angle measurement. The effect of the proposed solution is verified by PSCAD/EMTDC simulation,simulative results and actual operation show that the proposed solution is effective for abnormal measurement of extinction angle and ensures safe and stable operation of HVDC system.
引文
[1] RAHIMI E,GOLE A M,DAVIES J B,et al. Commutation failure analysis in multi-infeed HVDC systems[J]. IEEE Transactions on Power Delivery,2011,26(1):378-384.
[2]王晶,梁志峰,江木,等.多馈入直流同时换相失败案例分析及仿真计算[J].电力系统自动化,2015,39(4):141-146.WANG Jing,LIANG Zhifeng,JIANG Mu,et al. Case analysis and simulation of commutation failure in multiinfeed transmission systems[J]. Automation of Electric Power Systems,2015,39(4):141-146.
[3]汪隆君,王钢,李海锋,等.交流系统故障诱发多直流馈入系统换相失败风险评估[J].电力系统自动化,2011,35(3):9-14.WANG Longjun,WANG Gang,LI Haifeng,et al. Risk evaluation of commutation failure in multi-infeed HVDC systems under AC System fault conditions[J]. Automation of Electric Power Systems,2011,35(3):9-14.
[4]邵瑶,汤涌.采用多馈入交互作用因子判断高压直流系统换相失败的方法[J].中国电机工程学报,2012,32(4):108-114.SHAO Yao,TANG Yong. A commutation failure detection method for HVDC systems based on multi-infeed interaction factors[J].Proceedings of the CSEE,2012,32(4):108-114.
[5]袁阳,卫志农,雷霄,等.直流输电系统换相失败研究综述[J].电力自动化设备,2013,33(11):140-147.YUAN Yang,WEI Zhinong,LEI Xiao,et al. Research survey on commutation failure in DC transmission system[J]. Electric Power Automation Equipment,2013,33(11):140-147.
[6]欧开健,任震,荆勇.直流输电系统换相失败的研究(一)———换相失败的影响因素分析[J].电力自动化设备,2003,23(5):5-8.OU Kaijian,REN Zhen,JING Yong. Research on commutation failure in HVDC transmission system part 1:commutation failure factors analysis[J]. Electric Power Automation Equipment,2003,23(5):5-8.
[7]任震,欧开健,荆勇.直流输电系统换相失败的研究(二)———避免换相失败的措施[J].电力自动化设备,2003,23(6):6-9.REN Zhen,OU Kaijian,JING Yong. Research on commutation failure in HVDC transmission system part 2:measures against commutation failure[J]. Electric Power Automation Equipment,2003,23(6):6-9.
[8]王海军,黄义隆,周全.高压直流输电换相失败响应策略与预测控制技术路线分析[J].电力系统保护与控制,2014,42(21):124-131.WANG Haijun,HUANG Yilong,ZHOU Quan. Analysis of commutation failure response strategies and prediction control technology in HVDC[J]. Power System Protection and Control,2014,42(21):124-131
[9]严海健,凡朋,姚言超,等.高压直流系统受端实测型与预测型换相失败响应特性分析[J].电工技术,2018(5):87-90.YAN Haijian,FAN Peng,YAO Yanchao,et al. Analysis of commutation failure response characteristics based on actual measuring and prediction control in the inverter station of HVDC system[J]. Electric Engineering,2018(5):87-90.
[10]郝跃东,倪汝冰. HVDC换相失败影响因素分析[J].高电压技术,2006,32(9):38-41.HAO Yuedong,NI Rubing. Analysis on influence factors of commutation failure in HVDC[J]. High Voltage Engineering,2006,32(9):38-41.
[11] THIO C V,DAVIES J B,KENT K L. Commutation failures in HVDC transmission systems[J]. IEEE Transactions on Power Delivery,1996,11(2):946-957.
[12]赵畹君.高压直流输电工程技术[M].北京:中国电力出版社,2004:33-37.
[13]何朝荣,李兴源,金小明,等.高压直流输电系统换相失败的判断标准[J].电网技术,2006,30(22):19-23,58.HE Zhaorong,LI Xingyuan,JIN Xiaoming,et al. Study on mutual admittance and commutation failure for multi-infeed HVDC transmission systems[J]. Power System Technology,2008,28(7):51-57.
[2]王晶,梁志峰,江木,等.多馈入直流同时换相失败案例分析及仿真计算[J].电力系统自动化,2015,39(4):141-146.WANG Jing,LIANG Zhifeng,JIANG Mu,et al. Case analysis and simulation of commutation failure in multiinfeed transmission systems[J]. Automation of Electric Power Systems,2015,39(4):141-146.
[3]汪隆君,王钢,李海锋,等.交流系统故障诱发多直流馈入系统换相失败风险评估[J].电力系统自动化,2011,35(3):9-14.WANG Longjun,WANG Gang,LI Haifeng,et al. Risk evaluation of commutation failure in multi-infeed HVDC systems under AC System fault conditions[J]. Automation of Electric Power Systems,2011,35(3):9-14.
[4]邵瑶,汤涌.采用多馈入交互作用因子判断高压直流系统换相失败的方法[J].中国电机工程学报,2012,32(4):108-114.SHAO Yao,TANG Yong. A commutation failure detection method for HVDC systems based on multi-infeed interaction factors[J].Proceedings of the CSEE,2012,32(4):108-114.
[5]袁阳,卫志农,雷霄,等.直流输电系统换相失败研究综述[J].电力自动化设备,2013,33(11):140-147.YUAN Yang,WEI Zhinong,LEI Xiao,et al. Research survey on commutation failure in DC transmission system[J]. Electric Power Automation Equipment,2013,33(11):140-147.
[6]欧开健,任震,荆勇.直流输电系统换相失败的研究(一)———换相失败的影响因素分析[J].电力自动化设备,2003,23(5):5-8.OU Kaijian,REN Zhen,JING Yong. Research on commutation failure in HVDC transmission system part 1:commutation failure factors analysis[J]. Electric Power Automation Equipment,2003,23(5):5-8.
[7]任震,欧开健,荆勇.直流输电系统换相失败的研究(二)———避免换相失败的措施[J].电力自动化设备,2003,23(6):6-9.REN Zhen,OU Kaijian,JING Yong. Research on commutation failure in HVDC transmission system part 2:measures against commutation failure[J]. Electric Power Automation Equipment,2003,23(6):6-9.
[8]王海军,黄义隆,周全.高压直流输电换相失败响应策略与预测控制技术路线分析[J].电力系统保护与控制,2014,42(21):124-131.WANG Haijun,HUANG Yilong,ZHOU Quan. Analysis of commutation failure response strategies and prediction control technology in HVDC[J]. Power System Protection and Control,2014,42(21):124-131
[9]严海健,凡朋,姚言超,等.高压直流系统受端实测型与预测型换相失败响应特性分析[J].电工技术,2018(5):87-90.YAN Haijian,FAN Peng,YAO Yanchao,et al. Analysis of commutation failure response characteristics based on actual measuring and prediction control in the inverter station of HVDC system[J]. Electric Engineering,2018(5):87-90.
[10]郝跃东,倪汝冰. HVDC换相失败影响因素分析[J].高电压技术,2006,32(9):38-41.HAO Yuedong,NI Rubing. Analysis on influence factors of commutation failure in HVDC[J]. High Voltage Engineering,2006,32(9):38-41.
[11] THIO C V,DAVIES J B,KENT K L. Commutation failures in HVDC transmission systems[J]. IEEE Transactions on Power Delivery,1996,11(2):946-957.
[12]赵畹君.高压直流输电工程技术[M].北京:中国电力出版社,2004:33-37.
[13]何朝荣,李兴源,金小明,等.高压直流输电系统换相失败的判断标准[J].电网技术,2006,30(22):19-23,58.HE Zhaorong,LI Xingyuan,JIN Xiaoming,et al. Study on mutual admittance and commutation failure for multi-infeed HVDC transmission systems[J]. Power System Technology,2008,28(7):51-57.