The Simulation And Calculation Of Sound Field In The HVDC

While HVDC plays a vital role in electricity transmission, the big noise there of has a bad effect on the production and life of the personnel in and outside the station. Simulation of sound field in the station is of great significance.This thesis has utilized the Sound PLAN software and completed the simulation of sound field in Huaxin and Caijiachong converter stations. After exploring the noise distribution, we have diagnosed the main noise source which affects the noise distribution inside and outside—converter transformer, smoothing reactor and AC filter field, and have analyzed the respective sound production principles. According to acoustics theory, the acoustic source model of the station has been constructed. Through processing, analyzing and inducing the data, and combining the actual situation, we have transformed the sound power level into the sound pressure level, which is lead into the model. Finally the Grid Noise Map of the two stations has been reached.After the actual survey, the simulation value and the actual observed value have been compared. Then the model of the sound field has been examined and adjusted by the Sound PLAN. The result shows that the established model of Huaxin and Caijiachong converter stations agrees with the actual situation in the main. For some reason, the unconformity of the simulation value to the actual observed value in individual spots exists, but the overall error remains within±3dB. Accuracy and feasibility of the model have been verified.