直流法测量极性组别原理及与向量图的关系探究

Study on Principle of DC Method Measurement for Polar Groups and Its Relationship with Vector Graphs

介绍了单相、三相变压器直流法测试绕组极性两种组别试验方法,以YN,y12和YN,d11两种接线组别为例对直流法测量变压器的原理进行分析,通过向量分解法探究极性组合与向量图的对应关系,找出直流法与向量分解法之间的联系和规律,确保了变压器组别判定的正确性。

Two types of group test methods are introduced for measuring the polarity of windings of single-phase and three-phase transformers based on the DC method.Taking two wiring groups(YN,y12 and YN,d11)as an example,analysis is conducted on the principle of DC method transformer measurement,the correspondence of polarity combination and vector graphs based on the vector decomposition method are investigated,and the relationship and the laws between the DC method and the vector deposition method is found out,which ensures the correctness of identifying the transformer groups.