特高压换流变压器绕组波过程分析
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摘要
特高压换流变压器的对地电位很高,所以对其在冲击电压作用下纵绝缘的考核更为严格。文中对特高压换流变压器端部普遍采用多根并绕分数匝插花纠结式线饼的等值纵向电容求解公式进行推导,并根据得出的绕组等值电路参数构建多绕组等值电路模型,最后对特高压换流变压器高压绕组在标准雷电冲击全波下的波过程进行分析计算。结果表明:插花纠结式线饼的等值电容要比普通纠结式线饼大很多,而且线饼并联导线根数越多,其等值电容越大。因此,插花纠结式线饼具有更加优良的抗冲击性能。
The potential of UHV converter transformer to ground is very high,so the test of longitudinal insulationunder impulse voltage is more stringent. In this paper,the equivalent longitudinal capacitance of interleave coil is de-rived which commonly used at the end of UHV transformer winding. The obtained equivalent circuit parameters areused to construct a multi-winding equivalent circuit model. The wave process of high voltage winding in UHV convert-er transformer under standard lightning full wave impulse is analyzed and calculated. The results show that the equiv-alent capacitance of interleave coil is much larger than that of ordinary coil,and the more number of parallel wires,the larger the equivalent capacitance. Therefore,interleave coil has more excellent anti-impulse performance.
The potential of UHV converter transformer to ground is very high,so the test of longitudinal insulationunder impulse voltage is more stringent. In this paper,the equivalent longitudinal capacitance of interleave coil is de-rived which commonly used at the end of UHV transformer winding. The obtained equivalent circuit parameters areused to construct a multi-winding equivalent circuit model. The wave process of high voltage winding in UHV convert-er transformer under standard lightning full wave impulse is analyzed and calculated. The results show that the equiv-alent capacitance of interleave coil is much larger than that of ordinary coil,and the more number of parallel wires,the larger the equivalent capacitance. Therefore,interleave coil has more excellent anti-impulse performance.
引文
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[19]刘兴会,江龙华,张锴,等.大型电力变压器绕组纵绝缘波过程计算分析[J].黑龙江电力,2012,34(2):116-119.LIU Xinghui,JIANG Longhua,ZHANG Kai,et al.Longitudinal insulation wave process calculation of large power transformer windings[J].Heilongjiang Electric Power,2012,34(2):116-119.
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[21]陈昌渔.电力变压器操作冲击试验电压波形的计算[J].高压电器,2016,52(1):27-29.CHEN Changyu.Power transformer operation impact test voltage waveform calculation[J].High Voltage Apparatus,2016,52(1):27-29.
[2]杜建平.基于等值电路模型的变压器波过程计算与软件开发[D].沈阳:沈阳工业大学,2012.DU Jianping.Transformer wave process calculation and software development based on equivalent circuit model[D].Shenyang:Shenyang University of Technology,2012.
[3]葛为民.220 kV自耦有载调压变压器的波过程分析[J].高电压技术,2004,20(10):37-40.GE Weimin.Wave process analysis of 220 k V auto-transformer[J].High Voltage Engineering,2004,20(10):37-40.
[4]CHIMKLAI S,MARTI J.Simplified three-phase transformer model for electromagnetic transient studies[J].IEEETransactions on Power Delivery,1995,10(3):1316-1325.
[5]KANG M,ENJETI P N,PITEL I J.Analysis and design of electronic transformers for electric power distribution system[J].IEEE Transactions on Power Electronics,1999,14(6):1133-1141.
[6]孟晨,李岩,解江伟,等.雷电冲击下变压器等值电路电感参数的计算与分析[J].变压器,2013,50(4):28-32.MENG Chen,LI Yan,XIE Jiangwei,et al.Calculation and analysis of inductance parameters of transformer equivalent circuit under lightning impulse[J].Transformer,2013,50(4):28-32.
[7]杜建平,李岩,徐希强,等.基于有限元法的变压器分布电容参数计算方法的研究[J].变压器,2012,49(2):6-9.DU Jianping,LI Yan,XU Xiqiang,et al.Research on calculation of distribution capacitance parameter in transformer based on FEM[J].Transformer,2012,49(2):6-9.
[8]王冰,孙优良.换流变压器中高串联电容绕组的电容分析[J].变压器,2007,44(7):12-15.WANG Bing,SUN Youliang.Capacitance analysis of high series capacitance winding in converter transformer[J].Transformer,2007,44(7):12-15.
[9]傅铁军,王健,钟俊涛,等.直流输电±800 kV换流变压器的绝缘结构分析[J].变压器,2009,46(3):1-5.FU Tiejun,WANG Jian,ZHONG Juntao,et al.Insulation structure analysis of±800 kV converter transformer in DCtransmission[J].Transformer,2009,46(3):1-5.
[10]NODA T,NAKAMOTO H,YOKOYAMA S.Accurate modeling of core-type distribution transformers for electromagnetic transient studies[J].IEEE Transactions on Power Delivery,2002,17(4):969-976.
[11]DE LEON F,SEMLYEN A.Complete transformer model for electromagnetic transients[J].IEEE Transactions on Power Delivery,1994,9(1):231-239.
[12]孟晨.多绕组电力变压器波过程的计算与分析[D].沈阳:沈阳工业大学,2013.MENG Chen.Multi-winding power transformer wave process calculation and analysis[D].Shenyang:Shenyang University of Technology,2013.
[13]张嘉祥.变压器线圈波过程[M].北京:水利电力出版社,1982:140-173.ZHANG Jiaxiang.Transformer winding wave process[M].Beijing:Water Resources and Electric Power Press,1982:140-173.
[14]林春耀,张哲铭,李军浩,等.变压器振荡型操作冲击试验影响因素的仿真分析[J].高压电器,2017,53(12):106-111.LIN Chunyao,ZHANG Zheming,LI Junhao,et al.Simulation analysis of influencing factors in transformer oscillation operation impact test[J].High Voltage Apparatus,2017,53(12):106-111.
[15]LIANG J F,ZHANG L,LI J H,et al.Study on oscillating switching impulse voltage generation for power transformer onsite test[J].IEEE Transactions on Power Delivery,2014,29(5):2223-2230.
[16]FUJITA S,HOSOKAWA N,SHIBUYA Y.Experimental investigation of high frequency voltage oscillation in transformer windings[J].IEEE Transactions on Power Delivery,1998,13(4):1201-1207.
[17]郭志锋,赵学风,顾朝敏,等.振荡冲击波发生电路的设计及其参数选取[J].变压器,2010,47(8):5-8.GUO Zhifeng,ZHAO Xuefeng,GU Chaomin,et al.Designand parameters selection of oscillating impulse voltage generator circuit[J].Transformer,2010,47(8):5-8.
[18]KANG M,ENJETI P N,PITEL I J.Analysis and design of electronic transformers for electric power distribution system[J].IEEE Transactions on Power Electronics,1999,14(6):1133-1141.
[19]刘兴会,江龙华,张锴,等.大型电力变压器绕组纵绝缘波过程计算分析[J].黑龙江电力,2012,34(2):116-119.LIU Xinghui,JIANG Longhua,ZHANG Kai,et al.Longitudinal insulation wave process calculation of large power transformer windings[J].Heilongjiang Electric Power,2012,34(2):116-119.
[20]杨方衡.变压器绕组波过程计算中冲击电压函数的确定[J].变压器,1983,(12):11-13.YANG Fangheng.Function of impulse voltage in transformer winding wave process calculation[J].Transformer,1983,(12):11-13.
[21]陈昌渔.电力变压器操作冲击试验电压波形的计算[J].高压电器,2016,52(1):27-29.CHEN Changyu.Power transformer operation impact test voltage waveform calculation[J].High Voltage Apparatus,2016,52(1):27-29.