非正弦负载电流下特高压换流变压器绕组的谐波损耗分析  

Study on the Harmonic Losses of UHV Converter Transformer Windings Subject to Non-sinusoidal Load Current

作　　者：张良县[1] 陈模生[1] 彭宗仁[1] 谢庆峰 龚宜祥 

机构地区：[1]电力设备电气绝缘国家重点实验室(西安交通大学),陕西省西安市710049 [2]常州西电变压器有限责任公司,江苏省常州市213012

出　　处：《中国电机工程学报》2014年第15期2452-2459,共8页Proceedings of the CSEE

基　　金：国家重点基础研究发展计划项目(973计划)(2011CB209404)~~

摘　　要：以一台型号为ZZDFPZ-340800/500-800的特高压换流变压器为研究对象,分别采用时域分析法和频域分析法对换流变压器在非正弦负载电流作用下绕组的损耗进行计算,得到绕组损耗的详细分布情况,并对这2种方法进行对比分析,得知频域分析法更适用于实际设计。针对GB/T18494.2-2007和IEC-61378标准在计算绕组各次谐波损耗时未考虑不同频率下集肤深度不同的缺点,引入一个谐波损耗因子对其进行修正,获得更加准确的结果值。以修正后的结果值作为变压器设计时的损耗评估保证基准值,可以降低换流变压器的制造成本。A ultra high voltage （UHV） converter transformer was taken as the research object, whose type was ZZDFPZ-340800/500-800. Time-domain analysis and frequency-domain analysis were used to calculate the losses of converter transformer windings subject to non-sinusoidal load current, and obtained the detailed distribution of windings losses. Result comparison between two different methods has been done, and it could be found that frequency-domain analysis method was much more suitable for practical design. In order to overcome the shortcomings of GB/T 18494.2-2007 and IEC-61378 which ignored the effect of different skin depth on eddy losses of windings under the different frequencies, a harmonic losses factor was introduced to correct the losses, and to get a more accurate result. Using the corrected result to form a basis guarantee for the purpose of losses evaluation can reduce the manufacturing cost of the converter transformer.

关 键 词：特高压 换流变压器 非正弦负载电流 谐波损耗因子 集肤效应 

分 类 号：TM411[电气工程—电器]