Power transformer is the main noise source of substation. In order to reduce the noise of transformer, this paper presents a double layer sound insulation wall structure of transformer tank. The sound insulation performance test of the sample based on the double wall panel structure is completed. Through the measured data and numerical simulation, the results show that the double-layer sound insulation panel has better sound insulation effect. When the air inside the sandwich space is pumped, the sound insulation volume is not significantly improved due to the deformation factor. The feasibility of this method is verified by experiments, which provides technical reference and experimental basis for noise control of oil-immersed transformer.
KEYWORDS: Transformers, Sensors, Acoustics, Fluctuations and noise, Velocity measurements, Signal processing, Data acquisition, Testing and analysis, Standards development
The main source of noise in the substation is the power transformer. The radiated sound intensity of transformer noise is an important factor affecting boundary noise of substation. It is also an important parameter of equipment factory control. In this paper, the noise intensity of variable voltage under no-load voltage and load current is tested. The transformer noise testing datum is designed. The factory noise intensity characteristics of 220kV power transformer are obtained. The project provides accurate test data for transformer factory noise evaluation.
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