特高压换流变压器绕组波过程分析  

Wave Process Analysis of UHV Converter Transformer

作　　者：张良县 帅远明 陈荣 张昭 张珊珊 ZHANG Liangxian;SHUAI Yuanming;CHEN Rong;ZHANG Zhao;ZHANG Shanshan(Xi＇an XD transformer Co.,Ltd.,Xi＇an 710077,China)

机构地区：[1]西安西电变压器有限责任公司,西安710077

出　　处：《高压电器》2018年第10期1-7,共7页High Voltage Apparatus

基　　金：国家重点基础研究发展计划项目(2017YFB0902700)~~

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 insulation under impulse voltage is more stringent. In this paper, the equivalent longitudinal capacitance of interleave coil is derived which commonly used at the end of UHV transformer winding. The obtained equivalent circuit parameters are used to construct a multi-winding equivalent circuit model. The wave process of high voltage winding in UHV converter transformer under standard lightning full wave impulse is analyzed and calculated. The results show that the equivalent 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.

关 键 词：纠结式线饼 特高压换流变压器 波过程分析 

分 类 号：TM41[电气工程—电器]