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In order to study the effect of load on the transformer vibration noise. In this paper, a S13-M-200/10 distribution transformer is taken as the experimental subject and an experimental platform was built to collect the vibration noise signals of the transformer under no-load, short-circuit, resistive load, inductive load and different load rate. These signals are used to study the vibration characteristics of transformers under different load rate and load characteristics. The results show that the amplitude of the 100Hz fundamental frequency increases with the increase of the load rate, and the amplitude of other frequency basically has no change. The inductive load will cause the increase of the amplitude of 150Hz and 250Hz components, and the amplitude increases with the increase of the inductive load. The research results of this paper provide a theoretical basis for the condition monitoring of transformers based on vibration noise signal.

Study on Vibration Noise Signal Characteristics of 10kv Distribution Transformer under Different Load Conditions