Prediction and analysis of 220kV substation based on geometric acoustic simulation

Abstract

With the continuous improvement of people's living standards, the city has gradually formed a residential community with high residential density. In order to meet the power demand of the community, each new community basically needs to establish a supporting indoor substation according to the power load of the residents. Considering the residents' electricity habits, the electricity room of the supporting substation in the residential area works 24 hours a day, resulting in frequent noise nuisance incidents. Therefore, the detailed analysis of the indoor noise distribution and the radiated noise from the envelope surface of the substation has a positive significance for the reasonable control of substation noise. In this paper, the method of combining indoor and outdoor simulation is used to predict the 220 kV indoor substation noise. The indoor noise is simulated by Odeon software, and the outdoor noise is simulated by Cadna / a software, the two kinds of software are also based on the virtual sound source and sound ray tracking method of geometric acoustics. Firstly, the noise spectrum of each wall is calculated by Odeon software, and then the noise spectrum is interpolated and attenuated according to the sound insulation spectrum of the composite wall. The calculated spectrum is used as the plane source intensity for noise prediction in Cadna / a software, and finally the noise value of sensitive points at the boundary of substation can be predicted.