应用附加电容器的不带并联电抗器输电线路自适应三相重合闸策略
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摘要
传统输电线路重合闸装置重合前不区分故障性质定时限重合,可能重合至故障状态线路,对系统造成二次冲击。由于不带并联电抗器的输电线路三相跳闸后电气量快速衰减,以往研究中基于电气量变化特征的故障性质判据难以适用于此。提出一种应用附加电容器的不带并联电抗器输电线路自适应三相重合闸策略。通过在线路跳闸后投入附加电容器,根据电容放(充)电电流的变化特征,判断线路是否处于故障状态。利用循环判定的方式,确定线路熄弧时间,判定线路故障性质。理论推导和基于PSCAD/EMTDC的仿真验证表明,所提重合闸策略能够在线路各种故障状态下准确判定线路故障性质,不受过渡电阻和故障位置影响,并在暂时性故障熄弧后可靠重合。
Fault and secondary strikes to power system may occur when the reclosing devices for traditional transmission lines blindly reclose without identifying fault characteristic. The existing studies of fault characteristic identification based on electric parameters cannot adapt to three-phase reclosure of transmission lines without shunt reactor because the electric parameters will damp quickly after its three-phase tripping. Therefore, we proposed an adaptive three-phase reclosing scheme of transmission lines in the absence of shunt reactors using additional capacitors. The status of transmission line was tested through the discharging(charging) current of additional capacitors installed at one end of the transmission line.The arc extinguish time and fault characteristic were determined by cycle judgment. Theoretical analysis and simulation based on PSCAD/EMTDC verify that the proposed transmission line adaptive three-phase reclosing scheme can identify the fault characteristic accurately under various kind of transmission line faults, is not influenced by transition resistance and fault location, and recloses reliably afterwards.
Fault and secondary strikes to power system may occur when the reclosing devices for traditional transmission lines blindly reclose without identifying fault characteristic. The existing studies of fault characteristic identification based on electric parameters cannot adapt to three-phase reclosure of transmission lines without shunt reactor because the electric parameters will damp quickly after its three-phase tripping. Therefore, we proposed an adaptive three-phase reclosing scheme of transmission lines in the absence of shunt reactors using additional capacitors. The status of transmission line was tested through the discharging(charging) current of additional capacitors installed at one end of the transmission line.The arc extinguish time and fault characteristic were determined by cycle judgment. Theoretical analysis and simulation based on PSCAD/EMTDC verify that the proposed transmission line adaptive three-phase reclosing scheme can identify the fault characteristic accurately under various kind of transmission line faults, is not influenced by transition resistance and fault location, and recloses reliably afterwards.
引文
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[16]邵文权,宋国兵,索南加乐,等.带并联电抗器输电线路三相自适应重合闸永久性故障判别[J].中国电机工程学报,2010,30(4):91-98.SHAO Wenquan,SONG Guobing,SUONAN Jiale,et al.Identification of permanent faults for three-phase adaptive reclosure of the transmission lines with shunt reactors[J].Proceedings of the CSEE,2010,30(4):91-98.
[17]解超,李凤婷,路亮,等.不带并联电抗器的风电场单回送出线自适应三相重合闸策略[J].电网技术,2017,41(11):3492-3498.XIE Chao,LI Fengting,LU Liang,et al.An adaptive three-phase reclosing scheme for wind farm single circuit outgoing line without shunt reactors[J].Power System Technology,2017,41(11):3492-3498.
[18]孙玉坤,陈晓平.电路原理[M].北京:机械工业出版社,2006.SUN Yukun,CHEN Xiaoping.Circuit principle[M].Beijing,China:China Machine Press,2006.
[19]索南加乐,梁振锋,宋国兵.自适应熄弧时刻的单相重合闸的研究[J].电力系统保护与控制,2012,40(5):37-41.SUONAN Jiale,LIANG Zhenfeng,SONG Guobing.Study of single-phase reclosure with adaptive secondary arc extinction[J].Power System Protection and Control,2012,40(5):37-41.
[20]刘培,杨军,陶丁涛.一种输电线路瞬时故障最佳重合闸时刻实用计算方法[J].电网技术,2013,37(3):635-640.LIU Pei,YANG Jun,TAO Dingtao.Practical online calculation of optimal reclosing time for transmission line under transient fault[J].Power System Technology,2013,37(3):635-640.
[2]李润昌,刘洪顺,娄杰,等.特高压无补偿线路潜供电弧电气特征与弧柱形态[J].高电压技术,2018,44(4):1359-1366.LI Runchang,LIU Hongshun,LOU Jie,et al.Investigation on electrical characteristics and arc column morphology of secondary arc on UHV transmission lines[J].High Voltage Engineering,2018,44(4):1359-1366.
[3]缪希仁,林瑞聪.基于关联维数与极端学习机的高压输电线路雷击过电压故障识别[J].高电压技术,2016,42(5):1519-1526.MIAO Xiren,LIN Ruicong.Lightning over-voltage fault identification of high-voltage transmission line based on correlation dimension and extreme learning machine[J].High Voltage Engineering,2016,42(5):1519-1526.
[4]王巨丰,刘津濂,吴国强,等.喷射气流灭弧条件下输电线路雷击跳闸率计算方法[J].高电压技术,2015,41(3):840-847.WANG Jufeng,LIU Jinlian,WU Guoqiang,et al.Calculation method of lightning trip-out rate of transmission line under jet stream arc-extinguishing condition[J].High Voltage Engineering,2015,41(3):840-847.
[5]黄智慧,邹积岩,邹啟涛,等.中性点直接接地系统的相控重合闸研究[J].中国电机工程学报,2016,36(17):4753-4761.HUANG Zhihui,ZOU Jiyan,ZOU Qitao,et al.Research on controlled reclosing for solidly earthed neutral systems[J].Proceedings of the CSEE,2016,36(17):4753-4761.
[6]罗勋华,黄纯,戴永梁,等.输电线路瞬时性故障的恢复电压直流偏移特性研究[J].电力自动化设备,2015,35(1):107-111.LUO Xunhua,HUANG Chun,DAI Yongliang,et al.DC offset characteristics of recovery voltage for transient transmission line fault[J].Electric Power Automation Equipment,2015,35(1):107-111.
[7]梁振锋,索南加乐,宋国兵,等.输电线路自适应重合闸研究综述[J].电力系统保护与控制,2013,41(6):140-147.LIANG Zhenfeng,SUONAN Jiale,SONG Guobing,et al.Research review of adaptive reclosure in transmission lines[J].Power System Protection and Control,2013,41(6):140-147.
[8]YUAN B,ZHANG B H,HAO Z G,et al.A study on auto-reclosing strategy for large-scale wind farm transmission line[C]∥2014 International Conference on Power System Technology(POWERCON 2014).Chengdu,China:[s.n.],2014:2827-2832.
[9]王羽佳,李华强,黄燕,等.暂态稳定视角下的最佳重合闸时间及其在线整定[J].电力自动化设备,2016,36(2):129-135.WANG Yujia,LI Huaqiang,HUANG Yan,et al.Optimal reclosing time orienting to transient stability and its online setting[J].Electric Power Automation Equipment,2016,36(2):129-135.
[10]RADOJEVIC Z,TERZIJA V,PRESTON G,et al.Smart overhead lines autoreclosure algorithm based on detailed fault analysis[J].IEEETransactions on Smart Grid,2013,41(4):1829-1838.
[11]LE BLOND S P,AGGARWAL R K.Design of adaptive autoreclosure schemes for 132 kV network with high penetration of wind-part 1:real-time modeling[J].IEEE Transactions on Power Delivery,2012,27(3):1055-1062.
[12]LE BLOND S P,AGGARWAL R K.Design of adaptive autoreclosure schemes for 132 kV network with high penetration of wind-part 2:real-time development and testing[J].IEEE Transactions on Power Delivery,2012,27(3):1063-1070.
[13]邵文权,张望妮,夏经德,等.基于模型识别的带并补电抗输电线路三相重合闸无故障识别[J].高电压技术,2016,42(5):1630-1635.SHAO Wenquan,ZHANG Wangni,XIA Jingde,et al.Model-recognition-based non-fault detection scheme for three-phase reclosure on reactored transmission lines[J].High Voltage Engineering,2016,42(5):1630-1635.
[14]王庆庆,王慧芳,林达,等.基于并联电抗器差模电流波形特征的三相自适应重合闸永久性故障识别[J].电网技术,2015,39(4):1127-1132.WANG Qingqing,WANG Huifang,LIN Da,et al.Identification of permanent faults for three-phase adaptive reclosure based on waveform characteristics of differential mode current in shunt reactors[J].Power System Technology,2015,39(4):1127-1132.
[15]梁振锋,索南加乐,康小宁,等.利用自由振荡频率识别的三相重合闸永久性故障判别[J].中国电机工程学报,2013,33(7):124-130.LIANG Zhenfeng,SUONAN Jiale,KANG Xiaoning,et al.Permanent faults identification using free oscillation frequency for three-phase reclosure on transmission lines with shunt reactors[J].Proceedings of the CSEE,2013,33(7):124-130.
[16]邵文权,宋国兵,索南加乐,等.带并联电抗器输电线路三相自适应重合闸永久性故障判别[J].中国电机工程学报,2010,30(4):91-98.SHAO Wenquan,SONG Guobing,SUONAN Jiale,et al.Identification of permanent faults for three-phase adaptive reclosure of the transmission lines with shunt reactors[J].Proceedings of the CSEE,2010,30(4):91-98.
[17]解超,李凤婷,路亮,等.不带并联电抗器的风电场单回送出线自适应三相重合闸策略[J].电网技术,2017,41(11):3492-3498.XIE Chao,LI Fengting,LU Liang,et al.An adaptive three-phase reclosing scheme for wind farm single circuit outgoing line without shunt reactors[J].Power System Technology,2017,41(11):3492-3498.
[18]孙玉坤,陈晓平.电路原理[M].北京:机械工业出版社,2006.SUN Yukun,CHEN Xiaoping.Circuit principle[M].Beijing,China:China Machine Press,2006.
[19]索南加乐,梁振锋,宋国兵.自适应熄弧时刻的单相重合闸的研究[J].电力系统保护与控制,2012,40(5):37-41.SUONAN Jiale,LIANG Zhenfeng,SONG Guobing.Study of single-phase reclosure with adaptive secondary arc extinction[J].Power System Protection and Control,2012,40(5):37-41.
[20]刘培,杨军,陶丁涛.一种输电线路瞬时故障最佳重合闸时刻实用计算方法[J].电网技术,2013,37(3):635-640.LIU Pei,YANG Jun,TAO Dingtao.Practical online calculation of optimal reclosing time for transmission line under transient fault[J].Power System Technology,2013,37(3):635-640.