某实际间歇性弧光接地事故仿真分析与对策研究
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摘要
针对实际工程中某110 kV变电站因单相接地故障引起的弧光接地过电压和铁磁谐振过电压,及其导致的多条10 kV线路电流保护和主变低后备保护动作原因与对策开展研究。用通用的电磁暂态仿真软件PSCAD/EMTDC建立了仿真模型,详细研究了间歇性弧光接地引起的过电压和故障消失激发的铁磁谐振造成的谐振过电压,并与金属性接地故障时激发铁磁谐振的情况进行了对比研究。提出PT采用二次消谐装置和系统中性点经消弧线圈接地两种消谐方法,并进行了仿真研究。结果表明,两种方法在合理配置时均能有效地消除铁磁谐振,防止类似事故的再次发生。
The paper focuses on the research of an arc grounding over-voltage and ferroresonance over-voltage caused by a single-phase grounding fault and its countermeasure occurring in a practical 110 kV substation,which results in that several 10 kV lines' current protection and main transformer low-side backup protection trip.The electromagnetic transient simulation model is established using PSCAD/EMTDC software package.Then the study on the over-voltage resulted from intermittent arc grounding fault and the ferroresonance excited by the fault extinguishment is carried out in detail.A comparison is made between the ferroresonance over-voltage exited by an intermittent arc grounding fault and that by a metallic single-phase grounding fault.The simulation of two kinds of countermeasure,PT delta connection winding connected with resistance or frequency division resonance apparatus and connecting an arc extinguishing winding to the neural point of power system,is carried out,confirming that the two measures can suppress ferroresonance effectively if a appropriate configuration is taken.
The paper focuses on the research of an arc grounding over-voltage and ferroresonance over-voltage caused by a single-phase grounding fault and its countermeasure occurring in a practical 110 kV substation,which results in that several 10 kV lines' current protection and main transformer low-side backup protection trip.The electromagnetic transient simulation model is established using PSCAD/EMTDC software package.Then the study on the over-voltage resulted from intermittent arc grounding fault and the ferroresonance excited by the fault extinguishment is carried out in detail.A comparison is made between the ferroresonance over-voltage exited by an intermittent arc grounding fault and that by a metallic single-phase grounding fault.The simulation of two kinds of countermeasure,PT delta connection winding connected with resistance or frequency division resonance apparatus and connecting an arc extinguishing winding to the neural point of power system,is carried out,confirming that the two measures can suppress ferroresonance effectively if a appropriate configuration is taken.
引文
[1]高亚栋,杜斌,赵峰,等.中性点经小电阻接地配电网中弧光接地过电压的研究[J].高压电器,2004,40(5):345-348.Gao Yadong,Du Bin,Zhao Feng,et al.Study on the arc-grounding over-voltage in the distribution system with neu-tral point grounded through low-resistance[J].High Volt-age Apparatus,2004,40(5):345-348.
[2]陈先禄,田凤兰,许文强,等.非线性电阻限制10kV电网弧光接地过电压分析[J].重庆大学学报(自然科学版),2006,29(7):38-40.Chen Xianlu,Tian Fenglan,Xu Wenqiang,et al.Limiting the arc over-voltage of10kV grids in application of nonlin-ear resistance[J].Journal of Chongqing University(Natu-ral Sceince Edition),2006,29(7):38-40.
[3]支元彦.弧光接地过电压及限制措施的研究与实施[D].兰州:兰州理工大学,2006.
[4]毛卫华.弧光接地过电压的危害及消弧措施[J].电气应用,2008,27(10):49-51.Mao Weihua.The harm and arcextinguishing measures of arc grounding over-voltage[J].Electrotechnical Application,2008,27(10):49-51.
[5]王接旭,侯建军,丁晓锋.弧光接地过电压引起设备烧毁事故原因分析[J].电气技术,2010,(1):79-81.Wang Jiexu,Hou Jianjun,Ding Xiaofeng.Analysis on the cause of the accident of the burning equipment cause by arc grounding over-voltage[J].Electrical Technique,2010,(1):79-81.
[6]张玲,郝春娟.电压互感器铁磁谐振过电压及防止[J].电力自动化设备,2000,20(3):29-31.Zhang Ling,Hao Chunjuan.Ferroresonance over-voltrage on power transformer and its prevention[J].Electric Power Automation Equipment.2000,20(3):29-31.
[7]王晓云,李宝树,庞承宗.电力系统铁磁谐振研究现状分析[J].电力科学与工程,2002,(4):49-51.Wang Xiaoyun,Li Baoshu,Pang Chengzong.Research re-view on ferroresonance in power systems[J].Electric Pow-er Science and Engineering,2002,(4):49-51.
[8]顾荣斌,蔡旭,陈海昆,等.非有效接地电网单相电弧接地故障的建模及仿真[J].电力系统自动化,2009,33(13):63-67.Gu Rongbin,Cai Xu,Chen Haikun,et al.Modeling and simulating of single-phase arc grounding fault in non-effec-tive earthed networks[J].Automation of Electric Power Systems,2009,33(13):63-67.
[9]康健.接地故障电弧的精确数字仿真及其计算[J].继电器,2002,30(5):14-16.Kang Jian.Exact digital simulation and calculation of fault arcs[J].Relay,2002,30(5):14-16.
[10]黄绍平,杨青,李靖.基于MATLAB的电弧模型仿真[J].电力系统及其自动化学报,2005,17(5):64-70.Huang Shaoping,Yang Qing,Li Jing.Simulation of arc models based on MATLAB[J].Proceedings of the CSU-EPSA,2005,17(5):64-70.
[11]John S A T,Aggarwal R K,Song Y H.Improved tech-niques for modeling fault ares on faulted EHV transmission systems[J].IEE Proceedings-Generation,Transmission and Distribution,,1994,141(2):148-154.
[12]司马文霞,郭飞,杨庆,等.变电站铁磁谐振仿真分析及抑制措施[J].电力自动化设备,2007,27(6):21-25.Sima Wenxia,Guo Fei,Yang Qing,et al.Simulative anal-ysis of substation ferroresonance and its suppression meas-ures[J].Electric Power Automation Equipment,2007,27(6):21-25.
[13]周浩,余宇红,张利庭,等.10kV配电网铁磁谐振消谐措施的仿真比较研究[J].电网技术,2005,29(22):24-33.Zhou Hao,Yu Yuhong,Zhang Liting,et al.Comparative study on ferroresonance elimination measures in10kV pow-er distribution system by simulation method[J].Power System Technology,2005,29(22):24-33.
[14]许志龙,黄建华,王大忠.10kV电网TV铁磁谐振过电压数字仿真及研究[J].电力自动化设备,2001,21(2):27-29.Xu Zhilong,Huang Jianhua,Wang Dazhong.The digital simulation and study of TV ferroresonance over-voltage in 10kV power network[J].Electric Power Automation E-quipment,2001,21(2):27-29.
[15]束洪春.配电网络故障选线[M].北京:机械工业出版社,2008.
[16]屠志健,张一尘.电气绝缘与过电压[M].北京:中国电力出版社,2005.
[17]王海棠,窦春霞,王宁,等.基于ATP-EMTP的PT铁磁谐振与消谐措施研究[J].变压器,2008,45(3):24-28.Wang Haitang,Dou Chunxia,Wang Ning,et al.Research on PT ferroresonance and resonance elimination measures based on ATP-EMTP[J].Transfomer,2008,45(3):24-28.
[18]聂炯,郭飞,孙洪成.中性点不接地系统铁磁谐振仿真分析及谐振信号检测[J].四川电力技术,2008,31(5):43-48.Nie Jiong,Guo Fei,Sun Hongcheng.Ferroresonance simu-lation analysis and ferroresonance signal detect in neutral-isolated system[J].Sichuan Electric Power Technology,2008,31(5):43-48.
[19]张利庭.斜桥变电所铁磁谐振过电压的仿真研究[J].高电压技术,2006,32(7):43-45.Zhang Liting.Simulation study of measures for ferroreso-nance elimination in Xieqiao substation[J].High Voltage Engineering,2006,32(7):43-45.
[20]袁威,董新伟,徐敏.煤矿电网电压互感器故障的PSCAD仿真研究[J].工矿自动化,2008,(5):26-29.Yuan Wei,Dong Xinwei,Xu Min.PSCAD simulation re-search of fault of voltage transformer of coal mine powernetwork[J].Industry and Mine Automation,2008,(5):26-29.
[21]杜志叶,阮江军.铁磁谐振仿真模型的改进[J].继电器,2004,32(8):26-35.Du Zhiye,Ruan Jiangjun.Improvement on simulation mod-el of ferroresonance[J].Relay,2004,32(8):26-35.
[22]杨立峰,吴经锋.电压互感器铁损对铁磁谐振的影响[J].电网与清洁能源,2009,25(12):21-22.Yang Lifeng,Wu Jingfeng.Influence of potential transfer i-ron loss on ferroresonance[J].Power System and Clean Energy,2009,25(12):21-22.
[23]朱岸明,吴经锋,于国夫,等.互感器励磁特性线性度对铁磁谐振的影响分析[J].电网与清洁能源,2008,24(11):20-22.Zhu Anming,Wu Jingfeng,Yu Guofu,et al.Influences of the inductive potential transfer magnetizing characteristics on ferroresonance[J].Power System and Clean Energy,2008,24(11):20-22.
[24]李玲,李国庆.小电流接地系统Z形接地变压器模型设计[J].吉林电力,2006,34(3):25-27.Li ling,Li Guoqing.Design on ziazag grounding transform-er model in low current earthing system[J].Jilin Electric Power,2006,34(3):25-27.
[2]陈先禄,田凤兰,许文强,等.非线性电阻限制10kV电网弧光接地过电压分析[J].重庆大学学报(自然科学版),2006,29(7):38-40.Chen Xianlu,Tian Fenglan,Xu Wenqiang,et al.Limiting the arc over-voltage of10kV grids in application of nonlin-ear resistance[J].Journal of Chongqing University(Natu-ral Sceince Edition),2006,29(7):38-40.
[3]支元彦.弧光接地过电压及限制措施的研究与实施[D].兰州:兰州理工大学,2006.
[4]毛卫华.弧光接地过电压的危害及消弧措施[J].电气应用,2008,27(10):49-51.Mao Weihua.The harm and arcextinguishing measures of arc grounding over-voltage[J].Electrotechnical Application,2008,27(10):49-51.
[5]王接旭,侯建军,丁晓锋.弧光接地过电压引起设备烧毁事故原因分析[J].电气技术,2010,(1):79-81.Wang Jiexu,Hou Jianjun,Ding Xiaofeng.Analysis on the cause of the accident of the burning equipment cause by arc grounding over-voltage[J].Electrical Technique,2010,(1):79-81.
[6]张玲,郝春娟.电压互感器铁磁谐振过电压及防止[J].电力自动化设备,2000,20(3):29-31.Zhang Ling,Hao Chunjuan.Ferroresonance over-voltrage on power transformer and its prevention[J].Electric Power Automation Equipment.2000,20(3):29-31.
[7]王晓云,李宝树,庞承宗.电力系统铁磁谐振研究现状分析[J].电力科学与工程,2002,(4):49-51.Wang Xiaoyun,Li Baoshu,Pang Chengzong.Research re-view on ferroresonance in power systems[J].Electric Pow-er Science and Engineering,2002,(4):49-51.
[8]顾荣斌,蔡旭,陈海昆,等.非有效接地电网单相电弧接地故障的建模及仿真[J].电力系统自动化,2009,33(13):63-67.Gu Rongbin,Cai Xu,Chen Haikun,et al.Modeling and simulating of single-phase arc grounding fault in non-effec-tive earthed networks[J].Automation of Electric Power Systems,2009,33(13):63-67.
[9]康健.接地故障电弧的精确数字仿真及其计算[J].继电器,2002,30(5):14-16.Kang Jian.Exact digital simulation and calculation of fault arcs[J].Relay,2002,30(5):14-16.
[10]黄绍平,杨青,李靖.基于MATLAB的电弧模型仿真[J].电力系统及其自动化学报,2005,17(5):64-70.Huang Shaoping,Yang Qing,Li Jing.Simulation of arc models based on MATLAB[J].Proceedings of the CSU-EPSA,2005,17(5):64-70.
[11]John S A T,Aggarwal R K,Song Y H.Improved tech-niques for modeling fault ares on faulted EHV transmission systems[J].IEE Proceedings-Generation,Transmission and Distribution,,1994,141(2):148-154.
[12]司马文霞,郭飞,杨庆,等.变电站铁磁谐振仿真分析及抑制措施[J].电力自动化设备,2007,27(6):21-25.Sima Wenxia,Guo Fei,Yang Qing,et al.Simulative anal-ysis of substation ferroresonance and its suppression meas-ures[J].Electric Power Automation Equipment,2007,27(6):21-25.
[13]周浩,余宇红,张利庭,等.10kV配电网铁磁谐振消谐措施的仿真比较研究[J].电网技术,2005,29(22):24-33.Zhou Hao,Yu Yuhong,Zhang Liting,et al.Comparative study on ferroresonance elimination measures in10kV pow-er distribution system by simulation method[J].Power System Technology,2005,29(22):24-33.
[14]许志龙,黄建华,王大忠.10kV电网TV铁磁谐振过电压数字仿真及研究[J].电力自动化设备,2001,21(2):27-29.Xu Zhilong,Huang Jianhua,Wang Dazhong.The digital simulation and study of TV ferroresonance over-voltage in 10kV power network[J].Electric Power Automation E-quipment,2001,21(2):27-29.
[15]束洪春.配电网络故障选线[M].北京:机械工业出版社,2008.
[16]屠志健,张一尘.电气绝缘与过电压[M].北京:中国电力出版社,2005.
[17]王海棠,窦春霞,王宁,等.基于ATP-EMTP的PT铁磁谐振与消谐措施研究[J].变压器,2008,45(3):24-28.Wang Haitang,Dou Chunxia,Wang Ning,et al.Research on PT ferroresonance and resonance elimination measures based on ATP-EMTP[J].Transfomer,2008,45(3):24-28.
[18]聂炯,郭飞,孙洪成.中性点不接地系统铁磁谐振仿真分析及谐振信号检测[J].四川电力技术,2008,31(5):43-48.Nie Jiong,Guo Fei,Sun Hongcheng.Ferroresonance simu-lation analysis and ferroresonance signal detect in neutral-isolated system[J].Sichuan Electric Power Technology,2008,31(5):43-48.
[19]张利庭.斜桥变电所铁磁谐振过电压的仿真研究[J].高电压技术,2006,32(7):43-45.Zhang Liting.Simulation study of measures for ferroreso-nance elimination in Xieqiao substation[J].High Voltage Engineering,2006,32(7):43-45.
[20]袁威,董新伟,徐敏.煤矿电网电压互感器故障的PSCAD仿真研究[J].工矿自动化,2008,(5):26-29.Yuan Wei,Dong Xinwei,Xu Min.PSCAD simulation re-search of fault of voltage transformer of coal mine powernetwork[J].Industry and Mine Automation,2008,(5):26-29.
[21]杜志叶,阮江军.铁磁谐振仿真模型的改进[J].继电器,2004,32(8):26-35.Du Zhiye,Ruan Jiangjun.Improvement on simulation mod-el of ferroresonance[J].Relay,2004,32(8):26-35.
[22]杨立峰,吴经锋.电压互感器铁损对铁磁谐振的影响[J].电网与清洁能源,2009,25(12):21-22.Yang Lifeng,Wu Jingfeng.Influence of potential transfer i-ron loss on ferroresonance[J].Power System and Clean Energy,2009,25(12):21-22.
[23]朱岸明,吴经锋,于国夫,等.互感器励磁特性线性度对铁磁谐振的影响分析[J].电网与清洁能源,2008,24(11):20-22.Zhu Anming,Wu Jingfeng,Yu Guofu,et al.Influences of the inductive potential transfer magnetizing characteristics on ferroresonance[J].Power System and Clean Energy,2008,24(11):20-22.
[24]李玲,李国庆.小电流接地系统Z形接地变压器模型设计[J].吉林电力,2006,34(3):25-27.Li ling,Li Guoqing.Design on ziazag grounding transform-er model in low current earthing system[J].Jilin Electric Power,2006,34(3):25-27.