±800kV直流分压器径向电位分布有限元分析
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摘要
直流分压器由于内部阻容单元与外绝缘结构电压分布不同,不可避免地使阻容单元与空心绝缘子之间形成径向电位差。为研究直流分压器径向电位与大气环境条件的关系,以具有复合外套的±800 kV直流分压器为例,采用有限元分析计算干燥、均匀湿污、非均匀湿污和大雨等条件下直流分压器内部的径向电位分布。计算结果表明,干燥条件下径向电位最高处位于分压器高压端附近第二节阻容单元处,最高径向电位差约为60 kV;湿污条件下,分压器最大径向电位略微升高,约3 kV;雨量较大并桥接部分伞裙时,最大径向电位会有不同程度的提高,与雨帘的长度和位置有关。直流分压器内部径向电位的抬升易引发内部电极径向放电的风险,因此直流分压器内部绝缘裕度设计过程中应考虑不同工况下的径向电位变化。
As the different electrical potential between internal resistance-capacitance unit and outdoor insulation,the radial potential difference between resistance-capacitance unit and Hollow insulator is inevitable.In order to find out the relationship between the internal radial potential of DC voltage divider and the surrounding environment,a FEM(Finite Element Method)analysis are carried out by the example of ±800 kV DC voltage divider with composite housing.The internal radial potential of DC voltage divider under the dry condition,uniform wet pollution,non-uniform wet pollution and heavy rain conditions are calculated.The simulation results show that the maximum radial potential of the DC divider subjected to dry condition is about 60 kV located at the second resistance-capacitance unit near the high voltage terminal.For the case of wet and polluted condition,the radial potential is about3 kV larger than that in the case of dry condition.When heavy rain and part of the sheds of the composite housing are bridged by the rain,the maximum radial potential increases,and the displacement is related to the length and location of the sheds bridged.With the increase of internal radial potential,the voltage divider will run the high risk of radial discharge.Thus then the radial potential under different environment conditions are strongly recommended to consider in the insulation design of DC voltage divider.
As the different electrical potential between internal resistance-capacitance unit and outdoor insulation,the radial potential difference between resistance-capacitance unit and Hollow insulator is inevitable.In order to find out the relationship between the internal radial potential of DC voltage divider and the surrounding environment,a FEM(Finite Element Method)analysis are carried out by the example of ±800 kV DC voltage divider with composite housing.The internal radial potential of DC voltage divider under the dry condition,uniform wet pollution,non-uniform wet pollution and heavy rain conditions are calculated.The simulation results show that the maximum radial potential of the DC divider subjected to dry condition is about 60 kV located at the second resistance-capacitance unit near the high voltage terminal.For the case of wet and polluted condition,the radial potential is about3 kV larger than that in the case of dry condition.When heavy rain and part of the sheds of the composite housing are bridged by the rain,the maximum radial potential increases,and the displacement is related to the length and location of the sheds bridged.With the increase of internal radial potential,the voltage divider will run the high risk of radial discharge.Thus then the radial potential under different environment conditions are strongly recommended to consider in the insulation design of DC voltage divider.
引文
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[8]胡宇洋,余珊珊.宝鸡换流站直流功率反向保护动作原因分析[J].电力系统自动化,2011,35(11):103-107.HU Yuyang,YU Shanshan.Fault analysis of DC power reverse protections of baoji HVDC converter station[J].Automation of Electric Power Systems,2011,35(11):103-107.
[9]胡翔.一起直流分压器故障导致直流系统闭锁事故分析[J].四川电力技术,2011,34(4):59-60.HU Xiang.A failure of HVDC pole blocking by the fault of DC divider[J].Sichuan Electric Power Technology,2011,34(4):59-60.
[10]汪本进,吴细秀,徐思恩,等.复奉特高压直流分压器二次电压异常原因分析[J].高压电器,2016,52(1):7-14.WANG Benjin,WU Xixiu,XU Si'en,et al.Investigate on the failure mechanism of the DC voltage divider for its secondary voltage jumping abnormally in Fulong and Fengxian substation[J].High Voltage Apparatus,2016,52(1):7-14.
[11]梁旭明,常勇,吴巾克,等.高压直流输电直流分压器内部故障分析及反措[J].电力系统自动化,2012,36(20):118-121.LIANG Xuming,CHANG Yong,WU Jinke,et al.Internal fault analysis of high voltage direct current transmission DC voltage divider with anti-accident measures[J].Automation of Electric Power Systems,2012,36(20):118-121.
[12]DU Z,HUANG G,RUAN J,et al.Calculation of the ionized field around the DC voltage divider[J].IEEE Transactions on Magnetics,2013,49(5):1933-1936.
[13]魏杰,高海峰,黄瑞平,等.±500 kV换流站直流场主设备典型外绝缘故障分析及对策[J].电网技术,2012,36(12):276-282.WEI Jie,GAO Haifeng,HUANG Ruiping,et al.Analysis and countermeasure on typical external insulation failure of main equipments of±500 kV converter stations[J].Power System Technology,2012,36(12):276-282.
[14]高海峰,樊灵孟,李庆峰,等.±500 kV高肇直流线路绝缘子积污特性对比分析[J].高电压技术,2010,36(3)672-677.GAO Haifeng,FAN Lingmeng,LI Qingfeng,et al.Comparative analysis on pollution deposited performances of insulators on the±500 kV Gao-Zhao DC transmission line[J].High Voltage Engineering,2010,36(3):672-677.
[15]孙保强,王黎明,关志成,等.电压种类及极性对绝缘子积污的影响[J].高电压技术,2013,39(12):3101-3108.SUN Baoqiang,WANG Liming,GUAN Zhicheng,et al.Influence of voltage types and polarity on contamination of insulators[J].HighVoltageEngineering,2013,39(12):3101-3108.
[16]律方成,秦春旭,郭文义,等.高海拔地区±800 k V特高压直流输电系统绝缘子带电自然积污特性[J].高电压技术,2013,39(3):513-519.LYU Fangcheng,QI Chunxu,GUO Wenyi,et al.Natural contamination deposited characteristics of±800 k V UHVDC insulators at high altitudes[J].High Voltage Engineering,2013,39(3):513-519.
[17]吴光亚,叶廷路,吴巾克,等.±500 kV换流站直流分压器用复合套管外绝缘闪络事故分析及处理措施[J].电瓷避雷器,2010(5):17-22.WU Guangya,YE Tinglu,WU Jinke,et al.Analysis and treatment measures on composite bushing external insulation flashover for the D.C.divider of±500 kV converter station[J].Insulators and Surge Arresters,2010(5):17-22.
[18]郭树永,郝江涛.天生桥换流站高压直流分压器雨闪事故分析[J].四川电力技术,2008,31(2):36-37.GUO Shuyong,HAO Jiangtao.Accident analysis on rain flashover of HVDC voltage divider in tianshengqiao converter station[J].Sichuan Electric Power Technology,2008,31(2):36-37.
[19]宿志一.超高压变电设备污秽外绝缘设计的重点[J].中国电力,2001,34(1):52-55.SU Zhiyi.To prevent the big bushing flashover the focal point of external insulation design of the UHV transformation equipment[J].Electric Power,2001,34(1):52-55.
[20]关志成,牛康,王黎明,等.环境湿度对硅橡胶材料憎水迁移性的影响[J].高电压技术,2012,38(8):2030-2036.GUAN Zhicheng,NIU Kang,WANG Liming,et al.Influence of ambient humidity on hydrophobicity transfer of silicone rubber material[J].High Voltage Engineering,2012,38(8):2030-2036.
[21]覃永雄,虞澜,傅佳,等.长波紫外照射下高温硫化硅橡胶的微观物性及憎水性研究[J].电工技术学报,2014,29(12):242-250.QIN Yongxiong,YU Lan,FU Jia,et al.Research on microscopic properties and hydrophobicity of high temperature vulcanization silicone rubber under long-wave ultraviolet radiation[J].Transactions of China Electrotechnical Society,2014,29(12):242-250.
[22]屠幼萍,陈静静,许卓,等.长期运行复合绝缘子憎水性的非均匀变化特性[J].高电压技术,2013,39(6):1469-1475.TU Youping,CHEN Jingjing,XU Zhuo,et al.Uneven change characteristic of composite insulators hydrophobicity in long-time service[J].High Voltage Engineering,2013,39(6):1469-1475.
[23]陈刚,韦晓星,苑舜,等.组合室温硫化硅橡胶对绝缘子电场分布的影响[J].高电压技术,2011,37(2):298-303.CHEN Gang,WEI Xiaoxing YUAN Shun,et al.Effect of combination room temperature vulcanized silicone rubber on electric field distribution of insulators[J].High Voltage Engineering,2011,37(2):298-303.
[24]QIN Y,XU Z,JIA Z,et al.An application of RTV with different conductivities in anti-icing[C]//Proceedings of 2009IEEE 9th International Conference on the Properties and Applications of Dielectric Materials.Harbin,China:IEEE,2009:41-44.
[25]QIN Y,WANG Z,XU Z,et al.Reducing ice coating on insulators by combining RTV with different volume resistivity[C]//Proceedings of IEEE Conference on Electrical Insulation and Dielectric Phenomena.Virginia Beach,VA:IEEE,2009:446-449.
[2]吴泽辉,张鹏,左干清.高肇高压直流系统电压波动的分析与处理[J].电力系统自动化,2008,32(5):104-107.WU Zehui,ZHANG Peng,ZUO Ganqing.Disturbance analysis and modification of DC voltage divider for gaozhao DC project[J].Automation of Electric Power Systems,2008,32(5):104-107.
[3]陈宏志,高奇,史仰伟.高肇直流极二直流线路电压光电传感器故障及其解决方案[J].现代电力,2009,26(5):24-26.CHEN Hongzhi,GAO Qi,SHI Yangwei.Analysis and solution to DC voltage poleⅡphotoelectric transformer failure in gaozhao HVDC transmission system[J].Modern Electric Power,2009,26(5):24-26.
[4]刘占双,石径.直流分压器电压异常引起直流闭锁原因及防范[J].青海电力,2012,31(s1):53-56.LIU Zhanshuang,SHI Jing.DC interlock reason and countermeasures induced by voltage abnormal of DC divider[J].Qinghai Electric Power,2012,31(s1):53-56.
[5]吴庆范,黄金海,张爱玲,等.团林换流站电压突变量保护研究[J].南方电网技术,2014,8(4):37-41.WU Qingfan,HUANG Jinhai,ZHANG Ailing,et al.Research of undervoltage sensing protection at tuanlin converter station[J].Southern Power System Technology,2014,8(4):37-41.
[6]胡学兵,张正茂,雷鸣.团林换流站高压直流电压异常波动分析与处理[J].高压电器,2014,50(9):111-118.HU Xuebing,ZHANG Zhengmao,LEI Ming.Analysis on HVDC voltage abnormal fluctuation of tuanlin converter station[J].High Voltage Apparatus,2014,50(9):111-118.
[7]孙少晗,付纪华,刘军,等.±500 kV换流站直流分压器扰动分析及改造[J].陕西电力,2012 40(5):34-38.SUN Shaohan,FU Jihua,LIU Jun,et al.Disturbance analysis and modification of±500 kV DC voltage divider for converter station[J].Shaanxi Electric Power,2012 40(5):34-38.
[8]胡宇洋,余珊珊.宝鸡换流站直流功率反向保护动作原因分析[J].电力系统自动化,2011,35(11):103-107.HU Yuyang,YU Shanshan.Fault analysis of DC power reverse protections of baoji HVDC converter station[J].Automation of Electric Power Systems,2011,35(11):103-107.
[9]胡翔.一起直流分压器故障导致直流系统闭锁事故分析[J].四川电力技术,2011,34(4):59-60.HU Xiang.A failure of HVDC pole blocking by the fault of DC divider[J].Sichuan Electric Power Technology,2011,34(4):59-60.
[10]汪本进,吴细秀,徐思恩,等.复奉特高压直流分压器二次电压异常原因分析[J].高压电器,2016,52(1):7-14.WANG Benjin,WU Xixiu,XU Si'en,et al.Investigate on the failure mechanism of the DC voltage divider for its secondary voltage jumping abnormally in Fulong and Fengxian substation[J].High Voltage Apparatus,2016,52(1):7-14.
[11]梁旭明,常勇,吴巾克,等.高压直流输电直流分压器内部故障分析及反措[J].电力系统自动化,2012,36(20):118-121.LIANG Xuming,CHANG Yong,WU Jinke,et al.Internal fault analysis of high voltage direct current transmission DC voltage divider with anti-accident measures[J].Automation of Electric Power Systems,2012,36(20):118-121.
[12]DU Z,HUANG G,RUAN J,et al.Calculation of the ionized field around the DC voltage divider[J].IEEE Transactions on Magnetics,2013,49(5):1933-1936.
[13]魏杰,高海峰,黄瑞平,等.±500 kV换流站直流场主设备典型外绝缘故障分析及对策[J].电网技术,2012,36(12):276-282.WEI Jie,GAO Haifeng,HUANG Ruiping,et al.Analysis and countermeasure on typical external insulation failure of main equipments of±500 kV converter stations[J].Power System Technology,2012,36(12):276-282.
[14]高海峰,樊灵孟,李庆峰,等.±500 kV高肇直流线路绝缘子积污特性对比分析[J].高电压技术,2010,36(3)672-677.GAO Haifeng,FAN Lingmeng,LI Qingfeng,et al.Comparative analysis on pollution deposited performances of insulators on the±500 kV Gao-Zhao DC transmission line[J].High Voltage Engineering,2010,36(3):672-677.
[15]孙保强,王黎明,关志成,等.电压种类及极性对绝缘子积污的影响[J].高电压技术,2013,39(12):3101-3108.SUN Baoqiang,WANG Liming,GUAN Zhicheng,et al.Influence of voltage types and polarity on contamination of insulators[J].HighVoltageEngineering,2013,39(12):3101-3108.
[16]律方成,秦春旭,郭文义,等.高海拔地区±800 k V特高压直流输电系统绝缘子带电自然积污特性[J].高电压技术,2013,39(3):513-519.LYU Fangcheng,QI Chunxu,GUO Wenyi,et al.Natural contamination deposited characteristics of±800 k V UHVDC insulators at high altitudes[J].High Voltage Engineering,2013,39(3):513-519.
[17]吴光亚,叶廷路,吴巾克,等.±500 kV换流站直流分压器用复合套管外绝缘闪络事故分析及处理措施[J].电瓷避雷器,2010(5):17-22.WU Guangya,YE Tinglu,WU Jinke,et al.Analysis and treatment measures on composite bushing external insulation flashover for the D.C.divider of±500 kV converter station[J].Insulators and Surge Arresters,2010(5):17-22.
[18]郭树永,郝江涛.天生桥换流站高压直流分压器雨闪事故分析[J].四川电力技术,2008,31(2):36-37.GUO Shuyong,HAO Jiangtao.Accident analysis on rain flashover of HVDC voltage divider in tianshengqiao converter station[J].Sichuan Electric Power Technology,2008,31(2):36-37.
[19]宿志一.超高压变电设备污秽外绝缘设计的重点[J].中国电力,2001,34(1):52-55.SU Zhiyi.To prevent the big bushing flashover the focal point of external insulation design of the UHV transformation equipment[J].Electric Power,2001,34(1):52-55.
[20]关志成,牛康,王黎明,等.环境湿度对硅橡胶材料憎水迁移性的影响[J].高电压技术,2012,38(8):2030-2036.GUAN Zhicheng,NIU Kang,WANG Liming,et al.Influence of ambient humidity on hydrophobicity transfer of silicone rubber material[J].High Voltage Engineering,2012,38(8):2030-2036.
[21]覃永雄,虞澜,傅佳,等.长波紫外照射下高温硫化硅橡胶的微观物性及憎水性研究[J].电工技术学报,2014,29(12):242-250.QIN Yongxiong,YU Lan,FU Jia,et al.Research on microscopic properties and hydrophobicity of high temperature vulcanization silicone rubber under long-wave ultraviolet radiation[J].Transactions of China Electrotechnical Society,2014,29(12):242-250.
[22]屠幼萍,陈静静,许卓,等.长期运行复合绝缘子憎水性的非均匀变化特性[J].高电压技术,2013,39(6):1469-1475.TU Youping,CHEN Jingjing,XU Zhuo,et al.Uneven change characteristic of composite insulators hydrophobicity in long-time service[J].High Voltage Engineering,2013,39(6):1469-1475.
[23]陈刚,韦晓星,苑舜,等.组合室温硫化硅橡胶对绝缘子电场分布的影响[J].高电压技术,2011,37(2):298-303.CHEN Gang,WEI Xiaoxing YUAN Shun,et al.Effect of combination room temperature vulcanized silicone rubber on electric field distribution of insulators[J].High Voltage Engineering,2011,37(2):298-303.
[24]QIN Y,XU Z,JIA Z,et al.An application of RTV with different conductivities in anti-icing[C]//Proceedings of 2009IEEE 9th International Conference on the Properties and Applications of Dielectric Materials.Harbin,China:IEEE,2009:41-44.
[25]QIN Y,WANG Z,XU Z,et al.Reducing ice coating on insulators by combining RTV with different volume resistivity[C]//Proceedings of IEEE Conference on Electrical Insulation and Dielectric Phenomena.Virginia Beach,VA:IEEE,2009:446-449.
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