Development of a Comprehensive Transformer Material System Analyzer

Abstract

In view of the phenomenon that the existing dry-type distribution transformers are replaced by aluminum and copper, there is no aluminum wire or aluminum wire-wrapped dry-type transformer standard for distribution in China, and it is impossible to accurately detect whether the dry-type transformer exists in aluminum-based copper. Based on this situation, a high-precision distribution network dry-type transformer comprehensive test system is developed. This system is a combination of transformer property testing, material testing, capacity testing, direct resistance testing, and ratio-ratio testing. It is for dry-type transformers. A high-precision comprehensive test system specially developed. The data conversion method of DC resistance and transformer capacity is mainly used. The method of accurately measuring the transformer ratio and the method of determining the material based on the transformer current density are used to detect whether the dry transformer is replaced with aluminum and copper. Accurately testing the transformer capacity can accurately detect whether the user changed or replaced the transformer nameplate. It can also accurately measure power frequency parameters such as capacity, load loss, no-load loss, impedance voltage, and no-load current of various transformers, thereby improving the ability to detect the quality of power equipment.