特高压变压器现场局放试验的变频电源方法应用  

Application of Variable Frequency Power Supply Method to In-site ACLD Tests of 1 000 kV UHV Transformer

作　　者：韩金华[1] 夏中原 王伟[1] 王吉[1] 王震宇[1] 李晓纲[1] 

机构地区：[1]河南电力试验研究院,郑州450052

出　　处：《高压电器》2013年第10期51-57,共7页High Voltage Apparatus

摘　　要：局部放电试验是目前预防和检测变压器绝缘缺陷的有效方法之一。文章介绍了以变频电源装置为试验电源在工程现场对1 000 kV变压器进行的局部放电试验。其中分析了1 000 kV变压器的性能参数及试验过程,并且对整个局放试验回路进行了适应性计算,与试验实测数据进行了对比分析,提出了放电干扰紫外定位、试验回路多端接地和试验电源加装隔离变等抗干扰措施,指出了该方法试验设备体积小、接线方式灵活等优点,认为该试验方法可以在特高压工程中推广使用。This article describes the partial discharge test in-site for 1 000 kV power transformers taking a variable frequency power supply as the test power source. The performance parameters and testing process of a 1 000 kV power transformer are analyzed. The whole test circuit is computed for validation, and the computation result is compared with the measured data. In addition, some anti-interference measures, such as detecting and locating partial discharge with ultraviolet, multipoint earthing of test circuit, and adding isolation transformer to test power source, are offered. This partial discharge test method has the advantages of smaller test equipment and flexible connection, and is worth while to propagate in ultra-high voltage projects.

关 键 词：局部放电试验 特高压 1000 KV变压器 变频电源 

分 类 号：TM41[电气工程—电器]