基于谐波效应的变压器绕组材质鉴别方法与实验验证

Transformer Winding Material Identification Method and Experimental Verification Based on Harmonic Effect

为实现配电变压器绕组材质的快速准确辨识,在已有研究的基础上提出了一种基于谐波效应的变压器绕组材质无损鉴别方法并进行了实验验证。首先研究了谐波效应下的理论机理,根据变压器绕组谐波电阻的计算公式分析了基于谐波效应法进行变压器绕组材质辨识的可行性。之后针对配电变压器常用联结组别的特征给出了对应的测试模型和等效电路,并对实验设备的误差影响进行了分析,最后利用不同绕组材质的配电变压器进行了实验验证并对该方法的工程实用性进行了说明。实验结果表明所述方法测试速度快、辨识准确度高,能够快速有效地进行配电变压器的绕组材质鉴别,具有广阔的工程应用前景。

In order to realize the fast and accurate identification of distribution transformer winding materials,we proposed a nondestructive identification method of transformer winding materials based on harmonic effect and experimentally verified it based on the existing research.Firstly,we studied the theoretical mechanism under harmonic effect,and analyzed the feasibility of material identification of transformer winding based on harmonic effect method according to the calculation formula of harmonic resistance of transformer winding.Then,the corresponding test model and equivalent circuit were given according to the characteristics of common connection groups of distribution transformers and the error effect of the experimental equipment was analyzed.Finally,we used the distribution transformers with different winding materials for experimental verification and explained the engineering practicability of this method.The experimental results show that the method described in the article is fast and accurate,and can quickly and effectively identify the winding material of distribution transformers,which has a broad engineering application prospect.