摘要
抽头式双变比电流互感器可以适应一次负荷变化的需要。通过与双二次绕组电流互感器的绕组和铁芯关系进行比较分析,可从理论上获得铁芯磁势平衡所应具备的条件。通过对抽头式双变比电流互感器的各种接线方式进行详细分析计算,可以确定实际负荷电流与期望电流的关系和非接地端的电位,以便选择正确的接线方式。
Multi-tap current transformers with two current ratios can be used for different primary loads.Based on the analysis of the winding and core compared with current transformers with two secondary windings,the requests to balance the core magnetometive force can be got.Based on the analysis and calculations for different secondary terminal connections,the relationship between the real currents and the expected currents can be got.The potential of secondary terminals can also be got.The analysis results can be used to evaluate different connection types.
作者
朱忠亭
ZHU Zhong-ting(East China Electric Power Design Institute Co.,Ltd.of CPECC,Shanghai 200063,China)
出处
《电力勘测设计》
2020年第10期22-25,34,共5页
Electric Power Survey & Design
关键词
抽头式
双变比
电流互感器
二次侧
接线方式
multi-tap
two current ratios
current transformer
secondary
connection types
