ZnO避雷器电阻片上电压承担率优化方法
|
摘要
氧化锌避雷器是过电压防护的重要电气设备,但非线性电阻片上电压分布不均匀将导致局部电阻片的运行荷电率升高,进而引发电阻片发生热崩溃.为此,通过定义每个氧化锌电阻片上的电压承担率,研究电阻片相对介电常数对电压承担率的影响,并给出一种通过改变上、下节氧化锌电阻片的相对介电常数来改善电阻片电压承担率的方法,采用COMSOL软件对330 kV变电站的氧化锌避雷器进行三维立体建模,研究氧化锌避雷器场强分布情况.结果表明,氧化锌避雷器上节采用大电容(相对介电常数为800),下节采用小电容(相对介电常数为650)时,电压分布不均匀系数得到很大的改善,从而优化了氧化锌避雷器的结构.
Zinc oxide arrester is an important electrical equipment for over-voltage protection,but the non-uniform distribution of voltage on the non-linear varistors will result in the increase of the operating charge rate of partial varistors,which in turn will lead to the thermal collapse of these varistors.For this purpose,by defining the voltage-bearing rate on each Zinc oxide resistor,the effect of the relative dielectric constant of the resistor on the voltage-bearing rate is studied,and a method to improve the volt-age-bearing rate on the resistor by changing the relative dielectric constant of the upper and lower sections of the Zinc oxide resistor is proposed,the three-dimensional model of Zinc oxide arrester in 330 k V substation is built by COMSOL software,and the field intensity distribution of Zinc oxide arresters is studied.The results show that the non-uniform coefficient of voltage distribution is greatly improved when large capacitance(relative dielectric constant 800) is used in the upper section and small capacitance(relative dielectric constant 650) is used in the lower section.Thus the structure of Zinc oxide arresters is optimized.
Zinc oxide arrester is an important electrical equipment for over-voltage protection,but the non-uniform distribution of voltage on the non-linear varistors will result in the increase of the operating charge rate of partial varistors,which in turn will lead to the thermal collapse of these varistors.For this purpose,by defining the voltage-bearing rate on each Zinc oxide resistor,the effect of the relative dielectric constant of the resistor on the voltage-bearing rate is studied,and a method to improve the volt-age-bearing rate on the resistor by changing the relative dielectric constant of the upper and lower sections of the Zinc oxide resistor is proposed,the three-dimensional model of Zinc oxide arrester in 330 k V substation is built by COMSOL software,and the field intensity distribution of Zinc oxide arresters is studied.The results show that the non-uniform coefficient of voltage distribution is greatly improved when large capacitance(relative dielectric constant 800) is used in the upper section and small capacitance(relative dielectric constant 650) is used in the lower section.Thus the structure of Zinc oxide arresters is optimized.
引文
[1]熊泰昌.电力避雷器[M].北京:中国水利水电出版社,2013:1-6.XIONG T C.Electric surge arresters[M].Beijing:China Water&Power Press,2013:1-6.(in Chinese)
[2]王辉,何锦强,赵倡皓,等.35kV金属氧化物避雷器雷电冲击老化性能的研究[J].电瓷避雷器,2014(4):72-77.WANG H,HE J Q,ZHAO C H,et al.Research of degradation performance of 35 k V MOA under lighting impulses[J].Insulators and Surge Arresters,2014(4):72-77.(in Chinese)
[3]秦锟.金属氧化物避雷器试验综述[J].科技资讯,2008(26):218.QIN K.Summary of tests of metal oxide surge arrester[J].Science&Technology Information,2008(26):218.(in Chinese)
[4]宋继军,菅雅弘,潘仰光.金属氧化物避雷器现状及发展趋势[J].电力设备,2005,6(8):1-3.SONG J J,JIAN Y H,PAN Y G.Present situation and development tendency of metal oxide lighting arrester[J].Electric E-quipment,2005,6(8):1-3.(in Chinese)
[5]何计谋,祝嘉喜,李晓峰.特高压避雷器的探讨[J].电瓷避雷器,2006,168(1):23-28.HE J M,ZHU J X,LI X F.Approach to UHV surge arresters[J].Insulators and Surge Arresters,2006,168(1):23-28.(in Chinese)
[6]徐静.氧化锌避雷器原理与试验分析[J].科技风,2010(8):229.XU J.Principle and test analysis of Zn O arrester[J].Technology Trend,2010(8):229.(in Chinese)
[7]孟庆喜,韩项峰,刘晓焱.氧化锌非线性电阻片的性能及制造工艺[J].电气工程学报,2009(4):44-47.MENG Q X,HAN X F,LIU X Y.Zinc Oxide nonlinear resistance film performance and manufacturing process[J].Journal of Electrical Engineering,2009(4):44-47.(in Chinese)
[8]刘博垚,徐建源,高强,等.特高压交流氧化锌避雷器电位分布仿真计算与分析[J].高压电器,2018(5):156-160.LIU B Y,XU J Y,GAO Q,et al.Simulation and analysis of the potential distribution of UHV AC Zn O surge arrester[J].High Voltage Apparatus,2018(5):156-160.(in Chinese)
[9]王保山,刘斌,张曦,等.交流特高压避雷器电压分布的测量与分析[J].高电压技术,2008,34(9):1781-1787.WANG B S,LIU B,ZHANG X,et al.Measurement and analysis about the potential distribution of the 1 000 k V metal oxide surge arrester[J].High Voltage Engineering,2008,34(9):1781-1787.(in Chinese)
[10]马烨,郭洁,矫立新,等.750 k V交流金属氧化物避雷器均压环结构对避雷器电位分布的影响研究[J].电瓷避雷器,2015(1):139-143.MA Y,GUO J,JIAO L X,et al.Study on influence of the grading ring structure on potential distribution of MOA for 750 k VAC system[J].Insulators and Surge Arresters,2015(1):139-143.(in Chinese)
[11]路彦峰.氧化锌避雷器电位分布数值计算研究[D].西安:西安电子科技大学,2007:36.LU Y F.Research on numerical calculation of the potential distribution of Zn O surge arrester arrester[D].Xi'an:Xidian University,2007:36.(in Chinese)
[12]DOMINGUEZ D C,ESPINO-CORTES F P,GOMEZ P.Optimized design of electric field grading systems in 115 k V non-ceramic insulators[J].IEEE Transactions on Dielectrics&Electrical Insulation,2013,20(1):63-70.
[13]HADDAD A,NAYLOR P.Finite-element computation of capacitance networks in multiple-electrode systems:Application to Zn O surge arresters[J].IEE Proceedings-Science,Measurement and Technology,2002,145(4):129-135.
[14]晋文杰,赵淼,汤霖,等.新型500 k V金属氧化物避雷器电位分布研究[J].高压电器.2010,46(5):39-41.JIN W J,ZHAO M,TANG L,et al.New 500 k V metal oxide arrester potential distribution[J].High Voltage Apparatus,2010,46(5):39-41.(in Chinese)
[15]张宏涛,何计谋,张慧娟,等.500 k V系统用无间隙金属氧化物避雷器的优化研究[J].电瓷避雷器,2011(6):103-107.ZHANG H T,HE J M,ZHANG H J,et al.The optimization research of 500 k V MOA without gap[J].Insulators and Surge Arresters,2011(6):103-107.(in Chinese)
[16]王保山,刘洋,汤霖,等.交流无间隙金属氧化物避雷器的电压分布特性研究[J].电瓷避雷器,2012(1):38-44.WANG B S,LIU Y,TANG L,et al.Research on characteristics of voltage distribution of the metal oxide arrester without gap used for AC system[J].Insulators and Surge Arresters,2012(1):38-44.(in Chinese)
[17]王奎.变电站避雷器电位分布及结构优化研究[D].南昌:华东交通大学,2016:5-7.WANG K.The optimization research of substation surge arrester potential distribution and structure[D].Nanchang:East China Jiaotong University,2016:5-7.(in Chinese)
[2]王辉,何锦强,赵倡皓,等.35kV金属氧化物避雷器雷电冲击老化性能的研究[J].电瓷避雷器,2014(4):72-77.WANG H,HE J Q,ZHAO C H,et al.Research of degradation performance of 35 k V MOA under lighting impulses[J].Insulators and Surge Arresters,2014(4):72-77.(in Chinese)
[3]秦锟.金属氧化物避雷器试验综述[J].科技资讯,2008(26):218.QIN K.Summary of tests of metal oxide surge arrester[J].Science&Technology Information,2008(26):218.(in Chinese)
[4]宋继军,菅雅弘,潘仰光.金属氧化物避雷器现状及发展趋势[J].电力设备,2005,6(8):1-3.SONG J J,JIAN Y H,PAN Y G.Present situation and development tendency of metal oxide lighting arrester[J].Electric E-quipment,2005,6(8):1-3.(in Chinese)
[5]何计谋,祝嘉喜,李晓峰.特高压避雷器的探讨[J].电瓷避雷器,2006,168(1):23-28.HE J M,ZHU J X,LI X F.Approach to UHV surge arresters[J].Insulators and Surge Arresters,2006,168(1):23-28.(in Chinese)
[6]徐静.氧化锌避雷器原理与试验分析[J].科技风,2010(8):229.XU J.Principle and test analysis of Zn O arrester[J].Technology Trend,2010(8):229.(in Chinese)
[7]孟庆喜,韩项峰,刘晓焱.氧化锌非线性电阻片的性能及制造工艺[J].电气工程学报,2009(4):44-47.MENG Q X,HAN X F,LIU X Y.Zinc Oxide nonlinear resistance film performance and manufacturing process[J].Journal of Electrical Engineering,2009(4):44-47.(in Chinese)
[8]刘博垚,徐建源,高强,等.特高压交流氧化锌避雷器电位分布仿真计算与分析[J].高压电器,2018(5):156-160.LIU B Y,XU J Y,GAO Q,et al.Simulation and analysis of the potential distribution of UHV AC Zn O surge arrester[J].High Voltage Apparatus,2018(5):156-160.(in Chinese)
[9]王保山,刘斌,张曦,等.交流特高压避雷器电压分布的测量与分析[J].高电压技术,2008,34(9):1781-1787.WANG B S,LIU B,ZHANG X,et al.Measurement and analysis about the potential distribution of the 1 000 k V metal oxide surge arrester[J].High Voltage Engineering,2008,34(9):1781-1787.(in Chinese)
[10]马烨,郭洁,矫立新,等.750 k V交流金属氧化物避雷器均压环结构对避雷器电位分布的影响研究[J].电瓷避雷器,2015(1):139-143.MA Y,GUO J,JIAO L X,et al.Study on influence of the grading ring structure on potential distribution of MOA for 750 k VAC system[J].Insulators and Surge Arresters,2015(1):139-143.(in Chinese)
[11]路彦峰.氧化锌避雷器电位分布数值计算研究[D].西安:西安电子科技大学,2007:36.LU Y F.Research on numerical calculation of the potential distribution of Zn O surge arrester arrester[D].Xi'an:Xidian University,2007:36.(in Chinese)
[12]DOMINGUEZ D C,ESPINO-CORTES F P,GOMEZ P.Optimized design of electric field grading systems in 115 k V non-ceramic insulators[J].IEEE Transactions on Dielectrics&Electrical Insulation,2013,20(1):63-70.
[13]HADDAD A,NAYLOR P.Finite-element computation of capacitance networks in multiple-electrode systems:Application to Zn O surge arresters[J].IEE Proceedings-Science,Measurement and Technology,2002,145(4):129-135.
[14]晋文杰,赵淼,汤霖,等.新型500 k V金属氧化物避雷器电位分布研究[J].高压电器.2010,46(5):39-41.JIN W J,ZHAO M,TANG L,et al.New 500 k V metal oxide arrester potential distribution[J].High Voltage Apparatus,2010,46(5):39-41.(in Chinese)
[15]张宏涛,何计谋,张慧娟,等.500 k V系统用无间隙金属氧化物避雷器的优化研究[J].电瓷避雷器,2011(6):103-107.ZHANG H T,HE J M,ZHANG H J,et al.The optimization research of 500 k V MOA without gap[J].Insulators and Surge Arresters,2011(6):103-107.(in Chinese)
[16]王保山,刘洋,汤霖,等.交流无间隙金属氧化物避雷器的电压分布特性研究[J].电瓷避雷器,2012(1):38-44.WANG B S,LIU Y,TANG L,et al.Research on characteristics of voltage distribution of the metal oxide arrester without gap used for AC system[J].Insulators and Surge Arresters,2012(1):38-44.(in Chinese)
[17]王奎.变电站避雷器电位分布及结构优化研究[D].南昌:华东交通大学,2016:5-7.WANG K.The optimization research of substation surge arrester potential distribution and structure[D].Nanchang:East China Jiaotong University,2016:5-7.(in Chinese)