换流站直流场避雷器带电测试抗干扰研究
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摘要
直流避雷器在正常运行电压下漏电流较小,为微安级别,难以准确采集,且极易受外界条件干扰,目前国内对直流避雷器带电测试抗干扰研究工作开展较少。文中通过实验室开展直流避雷器在持续电压下的漏电流试验,研究漏电流受直流电压波动、温度和表面污秽等因素的干扰情况,并提出相应抗干扰措施,有利于排除直流避雷器开展带电测试过程中的干扰因素,准确判断直流避雷器运行状态。结论如下:(1)大幅值的直流电压波动会对直流场避雷器带电测试造成干扰,但在直流系统电压波动允许的±3%范围内,漏电流变化量与电压波动呈线性关系,带电测量直流避雷器漏电流时,必须记录当时的直流系统电压,以便对漏电流进行换算;(2)在直流避雷器正常运行温度范围内,漏电流的最大变化量不超过5μA,漏电流受避雷器内部温度影响较小,可忽略不计;(3)表面污秽对避雷器漏电流测试结果干扰比较严重,在直流避雷器表面潮湿且存在污秽的条件下,开展带电测试时必须加装屏蔽环,加装位置可以选择在避雷器低压端距法兰2-3个伞裙处。
The leakage current of DC arresters under CCOV is too low to catch,and it is easily to be interfered by ex-ternal conditions. There is seldom anti-interference research on live test of converter station DC arresters in domestic.This article tests the leakage current of DC arresters under CCOV in laboratory,and analyzes the influence of DCvoltage fluctuation,temperature and surface contamination on leakage current. The anti-interference measures are al-so proposed. The conclusions are as follow:(1)High amplitude DC voltage fluctuation will influence the live test re-sults of DC arresters. But within the range of ±3% that is permitted in DC system,the relationship between leakagecurrent and voltage fluctuation is linear. The temperature must be recorded in order to convert the leakage current;(2)Within the normal temperature range of arrester,the maximum variation of leakage current is less than 5 μA. Theleakage current is not affected by the internal temperature of the arrester;(3)The interference of surface contamina-tion on the leakage current test result is serious. In the condition of surface contamination on DC arresters,shieldring must be added when carrying out live test. The installation position can be selected at two to three umbrellas dis-tant from the flange in low voltage end of the arrester.
The leakage current of DC arresters under CCOV is too low to catch,and it is easily to be interfered by ex-ternal conditions. There is seldom anti-interference research on live test of converter station DC arresters in domestic.This article tests the leakage current of DC arresters under CCOV in laboratory,and analyzes the influence of DCvoltage fluctuation,temperature and surface contamination on leakage current. The anti-interference measures are al-so proposed. The conclusions are as follow:(1)High amplitude DC voltage fluctuation will influence the live test re-sults of DC arresters. But within the range of ±3% that is permitted in DC system,the relationship between leakagecurrent and voltage fluctuation is linear. The temperature must be recorded in order to convert the leakage current;(2)Within the normal temperature range of arrester,the maximum variation of leakage current is less than 5 μA. Theleakage current is not affected by the internal temperature of the arrester;(3)The interference of surface contamina-tion on the leakage current test result is serious. In the condition of surface contamination on DC arresters,shieldring must be added when carrying out live test. The installation position can be selected at two to three umbrellas dis-tant from the flange in low voltage end of the arrester.
引文
[1]常越,钱家骊.几种检测氧化物避雷器阻性漏电流方法的分析[J].电瓷避雷器,2014(4):120-121.CHANG Yue,QIAN Jiali.The analyze of some leakage current measurement methods[J].Insulators and Surge Arresters,2014(4):120-121.
[2]电力设备预防性试验规程[S].北京:中华人民共和国电力工业部,1996.Preventive test code for electric power equipment:DL/T596—1996[S].Beijing:Ministry of Power Industry of the PRC,1996.
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[4]孙鹏举.金属氧化物避雷器泄漏电流在线测试分析[J].电瓷避雷器,2008,14(4):30-32.SUN Pengju.Online measurement on leak current of MOA[J].Insulators and Surge Arresters,2008,14(4):30-32.
[5]祝铭,邹彬,万善良,等.采用测量阻性电流提高避雷器状态监测的可行性研究[J].电瓷避雷器,2007(6):31-36.ZHU Ming,ZOU Bin,WAN Shanliang,et al.Study on feasibility of monitoring MOA with measurement of resistive current[J].Insulators and Surge Arresters,2007(6):31-36.
[6]邵涛,周文俊,闫光华,等.电压谐波对金属氧化物避雷器泄漏电流及其阻性分量的影响[J].电网技术,2004,28(8):56-59.SHAO Tao,ZHOU Wenjun,YAN Guanghua,et al.Influence of voltage harmonics on leakage current and it’s resistive component of MOA[J].Power System Technology,2004,28(8):56-59.
[7]邵慧丽.电压谐波对MOA泄漏电流检测方法影响分析[J].电瓷避雷器,2012(1):94-98.SHAO Huili.Effect of voltage harmonics on test method of MOA leakage current[J].Insulators and Surge Arresters,2012(1):94-98.
[8]李顺尧.金属氧化锌避雷器测试方法对比与分析[J].高压电器,2010,46(3):94-97.LI Shunyao.Comparison and analysis of MOA test methods[J].High Voltage Apparatus,2010,46(3):94-97.
[9]蔡伟贤,陈蓓.提高氧化物避雷器带电测试准确性的探讨[J].电瓷避雷器,2011(8):63-67.CAI Weixian,CHEN Bei.Discussion on improving accuracy of MOA live testing[J].Insulators and Surge Arresters,2011(8):63-67.
[10]申忠如,郭福田,丁晖.氧化锌避雷器泄漏电流在线检测的研究[J].西安交通大学学报,1996,30(12):21-26.SHEN Zhongru,GUO Futian,DING Hui.Study of the Instruments for monitoring the state of the zinc oxide surge arresters on line[J].Journal of Xian Jiaotong University,1996,30(12):21-26.
[11]杨殿成.金属氧化物避雷器带电测试干扰分析[J].高压电器,2009,45(5):130-132.YANG Diancheng.Metal-oxide surge arresters live test interferences analyze[J].High Voltage Apparatus,2009,45(5):130-132.
[12]郭洁,朱跃.温度对避雷器电阻片主要电气性能的影响[J].电瓷避雷器,2002(2):28-30.GUO Jie,ZHU Yue.The interference of temperture for MOA main behaviour of electricity[J].Insulators And Surge Arresters,2002(2):28-30.
[13]钟定珠,樊灵孟,李谦.避雷器表面污秽对其影响[C]//2006年学术年会论文集.乌鲁木齐:中国电机工程学会高电压专业委员会过电压及绝缘配合学组,2006:55-58.ZHONG Dingzhu,FAN Lingmeng,LI Qian.The arresters’surface pollution and the interference[C]//The Proceedings of the Annual academic meeting.Urumqi:Overvoltage and Insulation Coordination Section of the High Voltage Professional Committee of the Chinese Association of Electrical Engineering,2006:55-58.
[14]殷雄开,邵涛,高翔,等.金属氧化物避雷器检测方法的现状与发展[J].高电压技术,2002,28(6):34-36.YIN Xiongkai,SHAO Tao,GAO Xiang,et al.Present state and future of detecting methods of MOA[J].High Voltage Engineering,2002,28(6):34-36.
[15]邓维,刘卫东,傅志扬,等.避雷器泄漏电流网络化在线监测系统[J].高电压技术,2003,29(9):22-23.DENG Wei,LIU Weidong,FU Zhiyang,et al.The network model on-line monitoring system of leakage current of Zn O surge arresters[J].High Voltage Engineering,2003,29(9):22-23.
[16]王永强,律方成,张柯,等.考虑电网谐波影响的避雷器在线检测方法[J].高电压技术,2003,29(9):24-25.WANG Yongqiang,LYU Fangcheng,ZHANG Ke,et al.Online monitoring of MOA considering the influence of harmonic voltage in power system[J].High Voltage Engineering,2003,29(9):24-25.
[17]高压直流换流站无间隙金属氧化物避雷器导则:GB/T22389—2008[S].北京:中国标准出版社,2008.Guidelines of metal oxide surge arresters without gaps for HVDC converter stations:GB/T 22389—2008[S].Beijing:Standards Press of China,2008.
[18]交流无间隙金属氧化物避雷器:GB 11032—2010[S].北京:中国标准出版社,2010.Metal-oxide surge arresters without gaps for a.c.systems:GB 11032—2010[S].Beijing:Standards Press of China,2010.
[19]交流系统用高压绝缘子的人工污秽试验:GB/T 4585—2004[S].北京:中国标准出版社,2004.Artificial pollution tests on high-voltage insulators to be used on AC systems:GB/T 4585—2004[S].Beijing:Standards Press of China,2004.
[20]贺国平,邵涛,周文俊.表面污秽对避雷器在线检测的影响[J].高电压技术,2003,29(6):27-28.HE Guoping,SHAO Tao,ZHOU Wenjun.Influence of external pollution on MOA online detection[J].High Voltage Engineering,2003,29(6):27-28.
[2]电力设备预防性试验规程[S].北京:中华人民共和国电力工业部,1996.Preventive test code for electric power equipment:DL/T596—1996[S].Beijing:Ministry of Power Industry of the PRC,1996.
[3]毛慧明,刘兵.金属氧化物避雷器带电检测方法综述[J].高电压技术,2000,26(3):15-16.MAO Huiming,LIU Bing.A summary of detection method of in service[J].High Voltage Engineering,2000,26(3):15-16.
[4]孙鹏举.金属氧化物避雷器泄漏电流在线测试分析[J].电瓷避雷器,2008,14(4):30-32.SUN Pengju.Online measurement on leak current of MOA[J].Insulators and Surge Arresters,2008,14(4):30-32.
[5]祝铭,邹彬,万善良,等.采用测量阻性电流提高避雷器状态监测的可行性研究[J].电瓷避雷器,2007(6):31-36.ZHU Ming,ZOU Bin,WAN Shanliang,et al.Study on feasibility of monitoring MOA with measurement of resistive current[J].Insulators and Surge Arresters,2007(6):31-36.
[6]邵涛,周文俊,闫光华,等.电压谐波对金属氧化物避雷器泄漏电流及其阻性分量的影响[J].电网技术,2004,28(8):56-59.SHAO Tao,ZHOU Wenjun,YAN Guanghua,et al.Influence of voltage harmonics on leakage current and it’s resistive component of MOA[J].Power System Technology,2004,28(8):56-59.
[7]邵慧丽.电压谐波对MOA泄漏电流检测方法影响分析[J].电瓷避雷器,2012(1):94-98.SHAO Huili.Effect of voltage harmonics on test method of MOA leakage current[J].Insulators and Surge Arresters,2012(1):94-98.
[8]李顺尧.金属氧化锌避雷器测试方法对比与分析[J].高压电器,2010,46(3):94-97.LI Shunyao.Comparison and analysis of MOA test methods[J].High Voltage Apparatus,2010,46(3):94-97.
[9]蔡伟贤,陈蓓.提高氧化物避雷器带电测试准确性的探讨[J].电瓷避雷器,2011(8):63-67.CAI Weixian,CHEN Bei.Discussion on improving accuracy of MOA live testing[J].Insulators and Surge Arresters,2011(8):63-67.
[10]申忠如,郭福田,丁晖.氧化锌避雷器泄漏电流在线检测的研究[J].西安交通大学学报,1996,30(12):21-26.SHEN Zhongru,GUO Futian,DING Hui.Study of the Instruments for monitoring the state of the zinc oxide surge arresters on line[J].Journal of Xian Jiaotong University,1996,30(12):21-26.
[11]杨殿成.金属氧化物避雷器带电测试干扰分析[J].高压电器,2009,45(5):130-132.YANG Diancheng.Metal-oxide surge arresters live test interferences analyze[J].High Voltage Apparatus,2009,45(5):130-132.
[12]郭洁,朱跃.温度对避雷器电阻片主要电气性能的影响[J].电瓷避雷器,2002(2):28-30.GUO Jie,ZHU Yue.The interference of temperture for MOA main behaviour of electricity[J].Insulators And Surge Arresters,2002(2):28-30.
[13]钟定珠,樊灵孟,李谦.避雷器表面污秽对其影响[C]//2006年学术年会论文集.乌鲁木齐:中国电机工程学会高电压专业委员会过电压及绝缘配合学组,2006:55-58.ZHONG Dingzhu,FAN Lingmeng,LI Qian.The arresters’surface pollution and the interference[C]//The Proceedings of the Annual academic meeting.Urumqi:Overvoltage and Insulation Coordination Section of the High Voltage Professional Committee of the Chinese Association of Electrical Engineering,2006:55-58.
[14]殷雄开,邵涛,高翔,等.金属氧化物避雷器检测方法的现状与发展[J].高电压技术,2002,28(6):34-36.YIN Xiongkai,SHAO Tao,GAO Xiang,et al.Present state and future of detecting methods of MOA[J].High Voltage Engineering,2002,28(6):34-36.
[15]邓维,刘卫东,傅志扬,等.避雷器泄漏电流网络化在线监测系统[J].高电压技术,2003,29(9):22-23.DENG Wei,LIU Weidong,FU Zhiyang,et al.The network model on-line monitoring system of leakage current of Zn O surge arresters[J].High Voltage Engineering,2003,29(9):22-23.
[16]王永强,律方成,张柯,等.考虑电网谐波影响的避雷器在线检测方法[J].高电压技术,2003,29(9):24-25.WANG Yongqiang,LYU Fangcheng,ZHANG Ke,et al.Online monitoring of MOA considering the influence of harmonic voltage in power system[J].High Voltage Engineering,2003,29(9):24-25.
[17]高压直流换流站无间隙金属氧化物避雷器导则:GB/T22389—2008[S].北京:中国标准出版社,2008.Guidelines of metal oxide surge arresters without gaps for HVDC converter stations:GB/T 22389—2008[S].Beijing:Standards Press of China,2008.
[18]交流无间隙金属氧化物避雷器:GB 11032—2010[S].北京:中国标准出版社,2010.Metal-oxide surge arresters without gaps for a.c.systems:GB 11032—2010[S].Beijing:Standards Press of China,2010.
[19]交流系统用高压绝缘子的人工污秽试验:GB/T 4585—2004[S].北京:中国标准出版社,2004.Artificial pollution tests on high-voltage insulators to be used on AC systems:GB/T 4585—2004[S].Beijing:Standards Press of China,2004.
[20]贺国平,邵涛,周文俊.表面污秽对避雷器在线检测的影响[J].高电压技术,2003,29(6):27-28.HE Guoping,SHAO Tao,ZHOU Wenjun.Influence of external pollution on MOA online detection[J].High Voltage Engineering,2003,29(6):27-28.