配电网开关型消弧装置选相失败的特性及对策研究
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摘要
在中性点不接地配电系统中,逐渐普及的开关型消弧装置无法完全保证选相无误,给配电网的正常运行带来风险。针对上述问题,从开关型消弧装置的工作原理着手,分析了消弧装置发生选相失败的原因。在选相失败发生后,对系统故障情况进行详细研究,得出故障前后馈线零序电流变化特征。根据这些故障特征,提出了判定选相失败及再次选相的方法,提高了开关型消弧装置应对选相失败的能力。最后,在PSCAD/EMTDC仿真软件搭建的10 kV配电网模型进行仿真分析,仿真结果表明所设计的选相失败对策具有较高的准确性,验证了该对策的合理性和有效性。
In the neutral point ungrounded power distribution system,the increasingly popular switch-type arc suppression devices can't absolutely guarantee the accuracy of phase selection,which brings risks to the normal operation of the distribution network.In view of the above problems,this paper starts with the working principle of the device,and analyzes the reasons for which may cause the phase selection failure. After the phase selection failure,the fault condition of the system is studied and the characteristics of zero-sequence current of feeders before and after the failure are obtained.According to these characteristics,this paper proposes a method for judging phase selection failure and reselection to improve the ability of the switch-type arc suppression devices to cope with phase selection failure.Finally,by using the PSCAD/EMTDC software,a 10 kV distribution network model is built and simulated.The simulation results indicate that the designed countermeasure for phase selection failure has high accuracy,verifying the rationality and effectiveness of the countermeasure.
In the neutral point ungrounded power distribution system,the increasingly popular switch-type arc suppression devices can't absolutely guarantee the accuracy of phase selection,which brings risks to the normal operation of the distribution network.In view of the above problems,this paper starts with the working principle of the device,and analyzes the reasons for which may cause the phase selection failure. After the phase selection failure,the fault condition of the system is studied and the characteristics of zero-sequence current of feeders before and after the failure are obtained.According to these characteristics,this paper proposes a method for judging phase selection failure and reselection to improve the ability of the switch-type arc suppression devices to cope with phase selection failure.Finally,by using the PSCAD/EMTDC software,a 10 kV distribution network model is built and simulated.The simulation results indicate that the designed countermeasure for phase selection failure has high accuracy,verifying the rationality and effectiveness of the countermeasure.
引文
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[10]艾绍贵,李秀广,黎炜,等.配电网快速开关型消除弧光接地故障技术研究[J].高压电器,2017,53(3):178-184.AI Shaogui,LI Xiuguang,LI Wei,et al.Arc suppression technology based on fast switch for distribution network[J].High Voltage Apparatus,2017,53(3):178-184.
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[13]刘渝根,王建南,马晋佩,等.结合小波包变换和5次谐波法的谐振接地系统综合故障选线方法[J].高电压技术,2015,41(5):1519-1525.LIU Yugen,WANG Jiannan,MA Jinpei,et al.Comprehensive fault line selection method for resonant grounded system combining wavelet packet transform with fifth harmonic method[J].High Voltage Engineering,2015,41(5):1519-1525.
[14]姜博,董新洲,施慎行.基于单相电流行波的配电线路单相接地故障选线方法[J].中国电机工程学报,2014,34(34):6216-6227.JIANG Bo,DONG Xinzhou,SHI Shenxing.A method of single phase to ground fault feeder selection based on single phase current traveling wave for distribution lines[J].Proceedings of the CSEE,2014,34(34):6216-6227.
[15]周志成,付慧,凌建,等.消弧线圈并联中阻选线的单相接地试验及分析[J].高电压技术,2009,35(5):1054-1058.ZHOU Zhicheng,FU Hui,LING Jian,et al.Single phasetoearth test and analysis for the fault line selection under arcsuppression coil parallel connecting the mid-resistance[J].High Voltage Engineering,2009,35(5):1054-1058.
[16]朱珂,王怡轩,倪建.主动干扰技术在消弧线圈接地系统故障选线中的应用[J].电力自动化设备,2017,37(10):189-196.ZHU Ke,WANG Yixuan,NI Jian.Application of active disturbance technology in faulty line selection of arc suppression coil grounding system[J].Electric Power Automation Equipment,2017,37(10):189-196.
[17]焦彦军,杨明玉,曹树江,等.电力系统继电保护原理[M].北京:中国电力出版社,2015:83-87.
[18]王丙东,蔡蕾,董旭,等.中性点不接地系统非对称短路故障分析[J].电力系统保护与控制,2017,43(3):149-153.WANG Bingdong,CAI Lei,DONG Xu,et al.Acomprehensive analysis for asymmetrical short-circuit fault of electric power system with neutral-point unground[J].Power System Protection and Control,2017,43(3):149-153.
[19]张波,王越.中性点不接地系统同一点两相接地短路故障分析[J].继电器,2007,33(15):59-61.ZHANG Bo,WANG Yue.Analyis of two-phase grounding fault of isolated neutral system[J].Relay,2007,33(15):59-61.
[20]晏锋,廖志军,刘伟平,等.自动跟踪消弧补偿装置与故障转移接地装置现场故障处理对比试验及分析[J].供用电,2017,34(11):89-92.YAN Feng,LIAO Zhijun,LIU Weiping,et al.The test and analysis of automatic tracking arc suppression compensation device and fault transfer grounding device onsite fault treatment[J].Distribution&Utilization,2017,34(11):89-92
[2]李谦,赵东生,肖磊石,等.广东电网小电流接地系统中性点接地方式优化对策[J].广东电力,2017,30(12):124-129.LI Qian,ZHAO Dongsheng,XIAO Leishi,et al.Optimization measures for neutral point grounding mode of small current grounding system of Guangdong power grid[J].Guangdong Electric Power,2017,30(12):124-129.
[3]靳孝峰,张琦.新型消弧及过电压保护装置[J].电力系统保护与控制,2009,37(1):101-103.JIN Xiaofeng,ZHANG Qi.New arc extinguishing and overvoltage protection equipment[J].Power System Protection and Control,2009,37(1):101-103.
[4]吕涛,邵文权,程远,等.配电网有源消弧深度补偿的分析与仿真研究[J].智慧电力,2018,46(4):33-38.LüTao,SHAO Wenquan,CHENG Yuan,et al.Analysis and simulation research on full compensation of distribution network active arc-suppression[J].Smart Power,2018,46(4):33-38.
[5]刘衍,龙国华,周求宽,等.开关型消弧激发PT过流的试验与仿真研究[J].高压电器,2017,53(2):87-94.LIU Yan,LONG Guohua,ZHOU Qiukuan,et al.Experimental and simulation study on over-current of PTcaused by switch type arc extinguishing[J].High Voltage Apparatus,2017,53(2):87-94.
[6]李新泉,齐郑,杨以涵.一种新型消弧方法的研究及其实现[J].电力系统保护与控制,2008,36(24):83-87.LI Xinquan,QI Zheng,YANG Yihan.Research and realization on a new tape arc-suppression method[J].Power System Protection and Control,2008,36(24):83-87.
[7]郑鹏鹏.配电网消弧装置应用中相关问题的研讨[J].电力自动化设备,2007,27(8):115-118.ZHENG Pengpeng.On arc suppression device applications in distribution network[J].Electric Power Automation Equipment,2007,27(8):115-118.
[8]陈忠仁,吴维宁,张勤,等.调匝式消弧线圈自动调谐新方法[J].电力系统自动化,2005,29(24):75-78.CHEN Zhongren,WU Weining,ZHANG Qin,et al.Design of remote communication in substation automation based on trusted computing method[J].Automation of Electric Power Systems,2005,29(24):75-78.
[9]李巍,陈伟.基于等效电路法的快速消弧装置的优化设计及参数分析[J].中国电机工程学报,2014,34(21):3496-3503.LI Wei,CHEN Wei.Optimization and parameter analysis of arc eliminators using adaptive equivalent circuit method[J].Proceedings of the CSEE,2014,34(21):3496-3503.
[10]艾绍贵,李秀广,黎炜,等.配电网快速开关型消除弧光接地故障技术研究[J].高压电器,2017,53(3):178-184.AI Shaogui,LI Xiuguang,LI Wei,et al.Arc suppression technology based on fast switch for distribution network[J].High Voltage Apparatus,2017,53(3):178-184.
[11]梁睿,杨学君,彭楠,等.基于广域零序分布电压特征的小电流接地选线方法[J].电网技术,2016,40(10):3236-3242.LIANG Rui,YANG Xuejun,PENG Nan,et al.A method for single-line-to-ground fault feeder selection based on the characteristic of wide area zero sequence voltage[J].Power System Technology,2016,40(10):3236-3242.
[12]吴乐鹏,黄纯,林达斌,等.基于暂态小波能量的小电流接地故障选线新方法[J].电力自动化设备,2013,33(5):70-75.WU Lepeng,HUANG Chun,LIN Dabin,et al.Faulty line selection based on transient wavelet energy for nonsolidearthed network[J].Electric Power Automation Equipment,2013,33(5):70-75.
[13]刘渝根,王建南,马晋佩,等.结合小波包变换和5次谐波法的谐振接地系统综合故障选线方法[J].高电压技术,2015,41(5):1519-1525.LIU Yugen,WANG Jiannan,MA Jinpei,et al.Comprehensive fault line selection method for resonant grounded system combining wavelet packet transform with fifth harmonic method[J].High Voltage Engineering,2015,41(5):1519-1525.
[14]姜博,董新洲,施慎行.基于单相电流行波的配电线路单相接地故障选线方法[J].中国电机工程学报,2014,34(34):6216-6227.JIANG Bo,DONG Xinzhou,SHI Shenxing.A method of single phase to ground fault feeder selection based on single phase current traveling wave for distribution lines[J].Proceedings of the CSEE,2014,34(34):6216-6227.
[15]周志成,付慧,凌建,等.消弧线圈并联中阻选线的单相接地试验及分析[J].高电压技术,2009,35(5):1054-1058.ZHOU Zhicheng,FU Hui,LING Jian,et al.Single phasetoearth test and analysis for the fault line selection under arcsuppression coil parallel connecting the mid-resistance[J].High Voltage Engineering,2009,35(5):1054-1058.
[16]朱珂,王怡轩,倪建.主动干扰技术在消弧线圈接地系统故障选线中的应用[J].电力自动化设备,2017,37(10):189-196.ZHU Ke,WANG Yixuan,NI Jian.Application of active disturbance technology in faulty line selection of arc suppression coil grounding system[J].Electric Power Automation Equipment,2017,37(10):189-196.
[17]焦彦军,杨明玉,曹树江,等.电力系统继电保护原理[M].北京:中国电力出版社,2015:83-87.
[18]王丙东,蔡蕾,董旭,等.中性点不接地系统非对称短路故障分析[J].电力系统保护与控制,2017,43(3):149-153.WANG Bingdong,CAI Lei,DONG Xu,et al.Acomprehensive analysis for asymmetrical short-circuit fault of electric power system with neutral-point unground[J].Power System Protection and Control,2017,43(3):149-153.
[19]张波,王越.中性点不接地系统同一点两相接地短路故障分析[J].继电器,2007,33(15):59-61.ZHANG Bo,WANG Yue.Analyis of two-phase grounding fault of isolated neutral system[J].Relay,2007,33(15):59-61.
[20]晏锋,廖志军,刘伟平,等.自动跟踪消弧补偿装置与故障转移接地装置现场故障处理对比试验及分析[J].供用电,2017,34(11):89-92.YAN Feng,LIAO Zhijun,LIU Weiping,et al.The test and analysis of automatic tracking arc suppression compensation device and fault transfer grounding device onsite fault treatment[J].Distribution&Utilization,2017,34(11):89-92