Human Subjective Annoyance And Adjustment Metrods Of Substation Noise

We monitored and sampled the noise of 110kV,220kV and 500kV substation. Then, we analyzed the data to obtain the A-weighted sound power level (LWA) and the characteristics of time domain, spectral and attenuation. The results of substation noise can provide acoustic parameters for predicting and controlling the substation noise.We established a method of predicting the substation noise based on Cadna/A software. We think the main transformer for five surface and modeled the method according the actual noise of substation.Different levels of the main transformer noise voltage is sampled by the main changein the process of actual noise attenuation sound samples, sound samples carried outusing the human subjective annoyance evaluation experiments, were used semantic subdivision and score a sample of the sound comprehensive evaluation, the main change has been the noise of human subjective response curve (including the high of annoyance and trouble the average rate curve curve) and the main transformer noise annoyance threshold, and then proposed a sound environment in different functional areas of the substation plant noise emission control boundary recommended limits.Main transformer using artificial noise sampling, editing, sound control methods using different samples of the original sound control, the use of paired comparison method for sound samples and control samples of the original sound annoyance to carry out subjective evaluation experiments, the main transformer substation to be reduced acoustic noise control methods proposed substation main transformer to reduce the subjective annoyance of noise sound adjustment measures.