110 kV智能变电站复杂环境下电子式互感器校验方法

为解决智能变电站电子式电压、电流互感器现场误差校验问题,分别提出了以IEC61850为通讯规约的基于比较法的电子式电压、电流互感器现场校验方法.以某110kV智能变电站为背景,首先分析了该智能变电站电子式电压、电流互感器的配置情况,然后详细阐述了使用所提出方法进行校验时一次设备的操作过程.在研究所提出的电子式互感器现场误差校验方法工作机理的基础上,建立了电子式电压互感器现场校验方法的一次等效电路,同时还建立了其等效数学模型.现场应用结果不仅证明了本文研究内容的有效性与正确性,而且表明该智能变电站的电子式电流互感器,可做0.2S级电流计量互感器使用;电子式电压互感器,可做0.2级电压计量互感器使用.

Calibration Method of Electronic Transformer in Complex Environment of 110 kV Smart Substation

For the field error calibration problems of electronic voltage transformer(EVT) and electronic current transformer(ECT) in smart substation,field calibration methods of EVT and ECT were proposed on the basis of voltage and current comparative methods.The proposed field calibration methods used the communication protocol IEC 61850.Using a 110 kV smart substation as the background,the distribution of EVT and ECT was analysed respectively,and the operation methods of primary devices were described by using the proposed field calibration methods.By studying the working principle of the proposed field calibration methods,the secondary basic principle and working mechanism of the proposed method were studied.Meanwhile,the equivalent mathematical model of EVT’s field calibration method was established.The field results not only demonstrate the effectiveness and accuracy of the proposed method,but also show that the tested EVT can be used as 0.2 level power meter transformers and the tested ECT can be used as 0.2S level power meter transformers.