The Impact Analysis Of Urban Substation Noise And The Research And Application Of Noise Reduction Measures

In recent years,with the continuous improvement of living standards and the popularization of smart home,electric cars and other new products,per capita electricity consumption of residents is increasing year by year.Large and small substations in densely populated area or in the center of the city are in urgent need of expansion or building,which is bound to increase investment and causes some substations become closed to residential buildings.Substation noise pollution has become a key complaints object,and audible noise has become one of the important control conditions of a city substation design and construction.Based on urban substation noise as the research object,by means of field survey and data analysis,the paper aims to find out the source of urban substation noise,master the noise characteristics of urban substation and put forward the feasible comprehensive noise control measures.In addition,the paper also develops and utilizes the "substation noise control optimization and simulation analysis software" to optimize the urban substation noise control scheme,which creates the conditions for the development of urban substation construction,harmonious development of environmental protection and the construction of "green substation".This paper focuses on the following four aspects.Firstly,it analyzes the basic characteristic of the noise,finds out the noise generation,propagation and acoustic reflection and transmission,interference,scattering,diffraction and acoustic attenuation characteristics in the process of transmission.Secondly,it carries out the detailed field sampling survey of the present situation of 110 kV and 220 kV substation city noise pollution,analyzes its results and finds out the main noise sources of pollution,such as substation transformer,reactor,capacitor,ventilation system,etc.Thirdly,it carefully researches the main noise source features of urban substation one by one,puts forward the general principles of urban substation noise control and analyzes the whole process of substation noise control from the perspective of the substation site selection,design scheme,optimized general layout and type selection of equipment.In addition,in view of the city substation main noise source,transformer,reactor,capacitor,ventilation system etc,the specific noise reduction measures are put forward respectively.Lastly,we have developed and utilized the "substation noise control optimization and simulation analysis software" to carry out the prediction analysis of substation noise impact and do research on the sensitive analysis,specific direction noise trend analysis,analysis of plane noise division,substation layout optimization,noise control scheme optimization and the optimization and selection of schemes,which provides the technical support for the improvement of substation noise control efficiency.