GIS电流互感器现场检定中的大电流升流方法  

High-current Generating Methods for On-site Calibration Tests of GIS Current Transformers

作　　者：章述汉[1] 李前[1] 吴良科[1] 李登云[1] 李鹤[1] 刘浩[1] 胡浩亮[1] 

机构地区：[1]国网电力科学研究院,武汉430074

出　　处：《电测与仪表》2009年第12期6-8,69,共4页Electrical Measurement & Instrumentation

摘　　要：目前变电站普遍采用GIS形式,电流互感器封装在罐体内部。GIS线路全封闭的特点使管道内电流互感器的检定试验回路长、阻抗大,所用设备多,难以升至设备额定电流。国际上一般采用外推法或CT分析仪进行操作,与现场实际运行工况不符,降低了检定数据的可靠性。用电容器进行无功补偿是减小试验升流设备容量的有效方法,本文针对电流互感器现场检定试验线路,提出了三种补偿方式,分析了各自的优缺点及适用范围,结合在中国1000kV特高压示范工程及750kV变电站的实践经验,总结了对GIS电流互感器进行全电流现场检定的方法。GIS is widely used in substations currently. As the current transformers were packaged in the closed tube, the on-site calibration test of GIS current transformers became difficult because of the long test loop and the large loop impedance. In this case, big quantity of high-current generating equipments was needed and the test Current is hard to achieve the rated value. As indirect methods, the CT analyzer and the error characteristics simulation method were often used to carry out the calibration operation which reduced the reliability of the test data. The reactive power compensation with capacitors is an effective way to reduce the demand of the current generating equipment. This paper brought forward three kind of compensation methods, analyzed their characteristics and applications,and introduced the practical experience of on-site calibration tests for GIS current transformer in Chinese 1000kV UHV power grid project and 750kV substations.

关 键 词：GIS 电流互感器 现场检定试验 无功补偿 

分 类 号：TM930.12[电气工程—电力电子与电力传动]