PT一二次接线方式与计量准确度关系的探讨

Discussion on Relation of PT Primary Secondary Connecting Mode and Metering Accuracy

高压配电网采用三相两元件的电能计量方式,而与之配合使用的两个电压互感器(Potential transform,PT)由于一二次侧极性端的不同配合方式可能对电能表的计量准确度产生影响。该文分析了开口三角形接线的电压互感器的多种接线方式,并从理论推导和实验分析两个角度出发论证其对电能表计量的影响。

A high voltage distribultion network adopts an electric energy way of three-phase binary element,and two potential transforms fixfted into it may have an effect on metering accuracy of the electric enery meter due to different fitting ways of the primary secondary side polarend.The paper analyzes multiple wiring ways of the potential transform for open-delta wiring and proves its effect on the electric energy meter from theoretical derivation and experimental analysis.