混合式高压直流断路器空间电场分布
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摘要
为提高高压直流断路器阀塔绝缘设计可靠性,针对自主设计的±535 k V混合式高压直流断路器阀塔,采用CREO和ANSYS混合建模技术,搭建直流断路器阀塔的3维模型,并进行静电场求解。对该模型添加阀端间直流耐压试验电压,求解得到组件和屏蔽系统的电场;添加阀支架直流耐压试验电压,求解得到阀支架的电场;在电场最大区域添加考察线,考察场强最大值周围空间电场分布规律。求解得到:±535 k V混合式高压直流断路器的最大场强为2.748 k V/mm,位于底层直屏蔽罩的倒角位置;离电极表面20 mm,场强减小至1.4 k V/mm;离电极表面40 mm,场强减小至1 k V/mm;离电极表面100 mm,场强减小至0.5 k V/mm以下。结果表明:±535 k V断路器的整体电场满足电场控制要求值,电极周围空气间隙中场强快速衰减。研究结果为±535 k V混合式高压直流断路器绝缘结构设计提供了可靠支撑,具有重要的借鉴价值。
To improve the insulation design reliability of HVDC circuit breaker tower, we established a 3 D model of self-designed HVDC circuit breaker tower using CREO and ANSYS hybrid modeling technology, and solved the model by electrostatic field finite element analysis method. We calculated the electric field of the component and shielding system by adding the DC withstand voltage test voltage, and calculated the electric field of valve support by adding the valve support DC withstand voltage test voltage. We got the electric field distribution around the maximum electric field by adding investigation lines. The calculation results show that the maximum electric field of ±535 k V hybrid HVDC circuit breaker is 2.747 k V/mm, which is located around the corner of underlying straight shielding case. The electric field is reduced to 1.4 k V/mm 20 mm away from the electrode surface, reduced to 1 k V/mm 40 mm away from the electrode surface and reduced to less than 0.5 k V/mm 100 mm away from the electrode surface. The results show that the electric field of ±535 k V HVDC circuit breaker tower meet the requirements of electric control value, and it decays rapidly in the air clearance around the electrode. The research provides a reliable support for designing the ±535 k V HVDC circuit breaker, and it has important reference value.
To improve the insulation design reliability of HVDC circuit breaker tower, we established a 3 D model of self-designed HVDC circuit breaker tower using CREO and ANSYS hybrid modeling technology, and solved the model by electrostatic field finite element analysis method. We calculated the electric field of the component and shielding system by adding the DC withstand voltage test voltage, and calculated the electric field of valve support by adding the valve support DC withstand voltage test voltage. We got the electric field distribution around the maximum electric field by adding investigation lines. The calculation results show that the maximum electric field of ±535 k V hybrid HVDC circuit breaker is 2.747 k V/mm, which is located around the corner of underlying straight shielding case. The electric field is reduced to 1.4 k V/mm 20 mm away from the electrode surface, reduced to 1 k V/mm 40 mm away from the electrode surface and reduced to less than 0.5 k V/mm 100 mm away from the electrode surface. The results show that the electric field of ±535 k V HVDC circuit breaker tower meet the requirements of electric control value, and it decays rapidly in the air clearance around the electrode. The research provides a reliable support for designing the ±535 k V HVDC circuit breaker, and it has important reference value.
引文
[1]徐政,薛英林,张哲任.大容量架空线柔性直流输电关键技术及前景展望[J].中国电机工程学报,2014,34(29):5051-5062.XU Zheng,XUE Yinglin,ZHANG Zheren.VSC-HVDC technology suitable for bulk power overhead line transmission[J].Proceedings of the CSEE,2014,34(29):5051-5062.
[2]贺之渊,赵岩,汤广福.±320 k V/1 000 MW柔性直流输电核心技术研发及应用[J].智能电网,2016,4(2):124-132.HE Zhiyuan,ZHAO Yan,TANG Guangfu.Key technology research and application of the±320 k V/1 000 MW VSC-HVDC[J].Smart Grid,2016,4(2):124-132.
[3]徐政,刘高任,张哲任.柔性直流输电网的故障保护原理研究[J].高电压技术,2017,43(1):1-8.XU Zheng,LIU Gaoren,ZHANG Zheren.Research on fault protection principle of DC grids[J].High Voltage Engineering,2017,43(1):1-8.
[4]吴亚楠,吕铮,贺之渊,等.基于架空线的直流电网保护方案研究[J].中国电机工程学报,2016,36(14):3726-3734.WU Yanan,LüZheng,HE Zhiyuan,et al.Study on the protection strategies of HVDC grid for overhead line application[J].Proceedings of the CSEE,2016,36(14):3726-3734.
[5]魏晓光,高冲,罗湘,等.柔性直流输电网用新型高压直流断路器设计方案[J].电力系统自动化,2013,37(15):95-102.WEI Xiaoguang,GAO Chong,LUO Xiang,et al.A novel design of high-voltage DC circuit breaker in HVDC flexible transmission grid[J].Automation of Electric Power Systems,2013,37(15):95-102.
[6]李斌,何佳伟.多端柔性直流电网故障隔离技术研究[J].中国电机工程学报,2016,36(1):87-95.LI Bin,HE Jiawei.Research on the DC fault isolating technique in multi-terminal DC system[J].Proceedings of the CSEE,2016,36(1):87-95.
[7]郑旭,丁坚勇,朱若曦,等.电流源型机电混合式直流断路器在特高压直流输电系统中的应用[J].高电压技术,2016,42(7):2243-2250.ZHENG Xu,DING Jianyong,ZHU Ruoxi,et al.Application of current-source hybrid electro-mechanical DC circuit breaker in UHVDC transmission systems[J].High Voltage Engineering,2016,42(7):2243-2250.
[8]ZHANG J,XU W J,WANG S H.Analysis of inter-turn insulation of high voltage electrical machine by using multi-conductor transmission line model[J].IEEE Transactions on Magnetic,2013,49(5):1905-1908.
[9]CHENG J W,PENG Z G,WANG J L.Electric field calculation and optimization of the UHVDC converter valve shield case[C]∥10th IEEE International Conference on the Properties and Applications of Dielectric Materials.Bangalore,India:IEEE,2012:1-4.
[10]齐磊,王星星,李超,等.±1 100 k V特高压直流换流阀绝缘型式试验下的电场仿真及优化[J].高电压技术,2015,41(4):1262-1271.QI Lei,WANG Xingxing,LI Chao,et al.Electric field simulation and optimization of±1 100 k V HVDC converter valve in insulation type test[J].High Voltage Engineering,2015,41(4):1262-1271.
[11]王加龙,彭宗任,刘鹏,等.±1 100 k V特高压换流站阀厅均压屏蔽金具表面电场分析[J].高电压技术,2015,41(11):3728-3736.WANG Jialong,PENG Zongren,LIU Peng,et al.Analysis of electric field on the surface of grading and shielding fittings inside±1 100 k V ultra-high voltage converter valve hall[J].High Voltage Engineering,2015,41(11):3728-3736.
[12]齐磊,张静岚,符瑜科,等.交直流复合电压下的稍不均匀场高压电极起晕特性[J].高电压技术,2017,43(9):2991-2997.QI Lei,ZHANG Jinglan,FU Yuke,et al.Corona onset characteristics for electrodes of slightly non-uniform electric field under composite AC-DC voltage[J].High Voltage Engineering,2017,43(9):2991-2997.
[13]王星星,罗潇,齐磊,等.高压直流换流阀用绝缘子表面电场计算及均压环设计[J].电网技术,2014,38(2):289-296.WANG Xingxing,LUO Xiao,QI Lei,et al.Calculation of electric field distribution along composite insulator and design of grading ring of HVDC converter valve[J].Power System Technology,2014,38(2):289-296.
[14]刘泽洪,丁永福,王祖力,等.特高压阀厅金具表面电场计算及起晕校核[J].中国电力,2014,47(10):19-23.LIU Zehong,DING Yongfu,WANG Zuli,et al.Calculation of the surface electric field and checking of the corona onset field intensity on the fittings inside UHVDC valve hall[J].Electric Power,2014,47(10):19-23.
[15]邱志斌,阮江军,黄道春,等.直流导线和阀厅金具的电晕起始电压预测[J].电工技术学报,2016,31(12):80-89.QIU Zhibin,RUAN Jiangjun,HUANG Daochun,et al.Prediction on corona onset voltage of DC conductors and valve hall fittings[J].Transactions of China Electrotechnical Society,2016,31(12):80-89.
[16]刘士利,王洋,李承彬,等.应用伽辽金边界元法的特高压直流换流站阀厅金具表面电场计算[J].高电压技术,2017,43(6):2049-2054.LIU Shili,WANG Yang,LI Chengbin,et al.Calculation for surface electric field intensity of UHVDC valve hall fittings with Galerkin boundary element method[J].High Voltage Engineering,2017,43(6):2049-2054.
[17]齐磊,李超,王星星,等.柔性高压直流输电系统换流阀塔交流电场仿真计算[J].高电压技术,2014,40(11):3537-3543.QI Lei,LI Chao,WANG Xingxing,et al.Simulation calculation of AC electric field for valve tower of flexible HVDC transmission system[J].High Voltage Engineering,2014,40(11):3537-3543.
[18]范彩云,胡秋玲,陶颖军,等.±500 k V柔性直流换流阀电场分布及绝缘特性研究[J].高压电器,2017,53(3):31-35.FAN Caiyun,HU Qiuling,TAO Yingjun,et al.Research of electric field distribution and insulation properties for±500 k V VSC-HVDC converter valve[J].High Voltage Apparatus,2017,53(3):31-35.
[19]周涛涛,阮江军,杜志叶,等.高海拔地区高压直流屏蔽金具电晕特性[J].高压电器,2017,53(9):3036-3041.ZHOU Taotao,RUAN Jiangjun,DU Zhiye,et al.Corona characteristics of HVDC shielding fittings in high altitude area[J].High Voltage Engineering,2017,53(9):3036-3041.
[20]M’HAMDI B,TEGUAR M,MEKHALDI A.Optimal design of corona ring on HV composite insulator using PSO approach with dynamic population size[J].IEEE Transactions on Dielectrics and Electrical Insulation,2016,23(2):1049-1057.
[21]周泽存,沈其工,方瑜.高电压技术[M].3版.北京:中国电力出版社,2009:12-81.ZHOU Zecun,SHEN Qigong,FANG Yu.High voltage technology[M].3rd ed.Beijing,China:China Electric Power Press,2009:12-81.
[22]PEEK W.Dielectric phenomena in high-voltage engineering[M].New York,USA:Mc Graw-Hill Book Company,1929.
[2]贺之渊,赵岩,汤广福.±320 k V/1 000 MW柔性直流输电核心技术研发及应用[J].智能电网,2016,4(2):124-132.HE Zhiyuan,ZHAO Yan,TANG Guangfu.Key technology research and application of the±320 k V/1 000 MW VSC-HVDC[J].Smart Grid,2016,4(2):124-132.
[3]徐政,刘高任,张哲任.柔性直流输电网的故障保护原理研究[J].高电压技术,2017,43(1):1-8.XU Zheng,LIU Gaoren,ZHANG Zheren.Research on fault protection principle of DC grids[J].High Voltage Engineering,2017,43(1):1-8.
[4]吴亚楠,吕铮,贺之渊,等.基于架空线的直流电网保护方案研究[J].中国电机工程学报,2016,36(14):3726-3734.WU Yanan,LüZheng,HE Zhiyuan,et al.Study on the protection strategies of HVDC grid for overhead line application[J].Proceedings of the CSEE,2016,36(14):3726-3734.
[5]魏晓光,高冲,罗湘,等.柔性直流输电网用新型高压直流断路器设计方案[J].电力系统自动化,2013,37(15):95-102.WEI Xiaoguang,GAO Chong,LUO Xiang,et al.A novel design of high-voltage DC circuit breaker in HVDC flexible transmission grid[J].Automation of Electric Power Systems,2013,37(15):95-102.
[6]李斌,何佳伟.多端柔性直流电网故障隔离技术研究[J].中国电机工程学报,2016,36(1):87-95.LI Bin,HE Jiawei.Research on the DC fault isolating technique in multi-terminal DC system[J].Proceedings of the CSEE,2016,36(1):87-95.
[7]郑旭,丁坚勇,朱若曦,等.电流源型机电混合式直流断路器在特高压直流输电系统中的应用[J].高电压技术,2016,42(7):2243-2250.ZHENG Xu,DING Jianyong,ZHU Ruoxi,et al.Application of current-source hybrid electro-mechanical DC circuit breaker in UHVDC transmission systems[J].High Voltage Engineering,2016,42(7):2243-2250.
[8]ZHANG J,XU W J,WANG S H.Analysis of inter-turn insulation of high voltage electrical machine by using multi-conductor transmission line model[J].IEEE Transactions on Magnetic,2013,49(5):1905-1908.
[9]CHENG J W,PENG Z G,WANG J L.Electric field calculation and optimization of the UHVDC converter valve shield case[C]∥10th IEEE International Conference on the Properties and Applications of Dielectric Materials.Bangalore,India:IEEE,2012:1-4.
[10]齐磊,王星星,李超,等.±1 100 k V特高压直流换流阀绝缘型式试验下的电场仿真及优化[J].高电压技术,2015,41(4):1262-1271.QI Lei,WANG Xingxing,LI Chao,et al.Electric field simulation and optimization of±1 100 k V HVDC converter valve in insulation type test[J].High Voltage Engineering,2015,41(4):1262-1271.
[11]王加龙,彭宗任,刘鹏,等.±1 100 k V特高压换流站阀厅均压屏蔽金具表面电场分析[J].高电压技术,2015,41(11):3728-3736.WANG Jialong,PENG Zongren,LIU Peng,et al.Analysis of electric field on the surface of grading and shielding fittings inside±1 100 k V ultra-high voltage converter valve hall[J].High Voltage Engineering,2015,41(11):3728-3736.
[12]齐磊,张静岚,符瑜科,等.交直流复合电压下的稍不均匀场高压电极起晕特性[J].高电压技术,2017,43(9):2991-2997.QI Lei,ZHANG Jinglan,FU Yuke,et al.Corona onset characteristics for electrodes of slightly non-uniform electric field under composite AC-DC voltage[J].High Voltage Engineering,2017,43(9):2991-2997.
[13]王星星,罗潇,齐磊,等.高压直流换流阀用绝缘子表面电场计算及均压环设计[J].电网技术,2014,38(2):289-296.WANG Xingxing,LUO Xiao,QI Lei,et al.Calculation of electric field distribution along composite insulator and design of grading ring of HVDC converter valve[J].Power System Technology,2014,38(2):289-296.
[14]刘泽洪,丁永福,王祖力,等.特高压阀厅金具表面电场计算及起晕校核[J].中国电力,2014,47(10):19-23.LIU Zehong,DING Yongfu,WANG Zuli,et al.Calculation of the surface electric field and checking of the corona onset field intensity on the fittings inside UHVDC valve hall[J].Electric Power,2014,47(10):19-23.
[15]邱志斌,阮江军,黄道春,等.直流导线和阀厅金具的电晕起始电压预测[J].电工技术学报,2016,31(12):80-89.QIU Zhibin,RUAN Jiangjun,HUANG Daochun,et al.Prediction on corona onset voltage of DC conductors and valve hall fittings[J].Transactions of China Electrotechnical Society,2016,31(12):80-89.
[16]刘士利,王洋,李承彬,等.应用伽辽金边界元法的特高压直流换流站阀厅金具表面电场计算[J].高电压技术,2017,43(6):2049-2054.LIU Shili,WANG Yang,LI Chengbin,et al.Calculation for surface electric field intensity of UHVDC valve hall fittings with Galerkin boundary element method[J].High Voltage Engineering,2017,43(6):2049-2054.
[17]齐磊,李超,王星星,等.柔性高压直流输电系统换流阀塔交流电场仿真计算[J].高电压技术,2014,40(11):3537-3543.QI Lei,LI Chao,WANG Xingxing,et al.Simulation calculation of AC electric field for valve tower of flexible HVDC transmission system[J].High Voltage Engineering,2014,40(11):3537-3543.
[18]范彩云,胡秋玲,陶颖军,等.±500 k V柔性直流换流阀电场分布及绝缘特性研究[J].高压电器,2017,53(3):31-35.FAN Caiyun,HU Qiuling,TAO Yingjun,et al.Research of electric field distribution and insulation properties for±500 k V VSC-HVDC converter valve[J].High Voltage Apparatus,2017,53(3):31-35.
[19]周涛涛,阮江军,杜志叶,等.高海拔地区高压直流屏蔽金具电晕特性[J].高压电器,2017,53(9):3036-3041.ZHOU Taotao,RUAN Jiangjun,DU Zhiye,et al.Corona characteristics of HVDC shielding fittings in high altitude area[J].High Voltage Engineering,2017,53(9):3036-3041.
[20]M’HAMDI B,TEGUAR M,MEKHALDI A.Optimal design of corona ring on HV composite insulator using PSO approach with dynamic population size[J].IEEE Transactions on Dielectrics and Electrical Insulation,2016,23(2):1049-1057.
[21]周泽存,沈其工,方瑜.高电压技术[M].3版.北京:中国电力出版社,2009:12-81.ZHOU Zecun,SHEN Qigong,FANG Yu.High voltage technology[M].3rd ed.Beijing,China:China Electric Power Press,2009:12-81.
[22]PEEK W.Dielectric phenomena in high-voltage engineering[M].New York,USA:Mc Graw-Hill Book Company,1929.