多变比电流互感器带电倒换装置的应用分析

Application and Analysis of Live Working Switching Device for Multi-transformation Ratio Current Transformer

随着负荷的不断增长，原电流互感器变比在运行中已不能满足负荷的增长需要。现运行的电流互感器多为多抽头式互感器，为了改变变比，必需将该一次设备全部停电，这样既影响了售电量，又潜在着运行危险。文章介绍了一种多变比电流互感器带电倒换装置可以用于10～220kV多变比式电流互感器，该装置倒换变比不需停电，对降低劳动成本，增加售电量，增加供电可靠性有着重要意义。

Along with the unceasing increase of load, transformation ratio of current transformer in operation cannot be satisfied with load increasing Now the current transformer in operation is multi - tap change type transformer, it is necessary to have power outage for changing the transformation ratio, which affects electricity sales and power grid operation. The paper introduced a kind of live working switching device for multi - transformation ratio current transformer, which can be used in 10 -220 kV multi - tap change type transformer, and need not power failure during switching, and has important meaning for reducing labour cost, increasing electricity sales and the reliability of power supply.