Design Of Lightning Protection System For 10kV Line In Dalian Area

At present,the 10 kV distribution line is our country electric power network system the part of yo.In this paper,the according to the present situation of 10 kV distribution line lightning protection analysis,carries on the transformation to the existing 10 kV distribution line,enhance the lightning protection performance.Through analysis of the cause of failure of transmission line,that the vast majority of line fault are due to lightning caused by,so to speak,lightning accident is result in power distribution equipment and the main cause of damage to electrical equipment,when the distribution equipment lightning damage will lead to large area blackout,resulting in industrial production,enterprises to stop operation,serious damage to the economic interests,in order to reduce the occurrence of such events,Dalian area for the region where the 10 kV electrical network transformation,and improve the measures of lightning protection level.Transformation here the main purpose is to reduce lightning or lightning induction on the grid causing damage,by reducing the incidence of lightning trip out,reduce electrical equipment because of power outages caused by tripping of damage,in order to ensure the power grid of reliable operation.Here is mainly introduced the distribution line in the Dalian area,is one of the main of Dalian Power Grid are analyzed,and the combination of urban and rural residents in Dalian three 10 kV line analysis are introduced,the three line between urban and rural is mainly the insulation level,lightning accidents occurred as the research,through previous data to calculate and present the results obtained grounding resistance and the resistance of soil parameters,the insulator flashover and some insulation breakdown experiments,and theoretical analysis and simulation based on these experimental phenomena and these experiment al results,mainly carries on the analysis to the cause of lightning accidents in Dalian area,and find out the solution.After analysis,the design of lightning protection system of Dalian distribution network line can know,the main reason of 10 kV distribution line Dalian area accident is because of lightning induced voltage caused by lightning induced voltages,mainly affect the reliable operation of power system,the power grid can stable operation,because the pilot discharge channel when the discharge is formed between the lightning and the distribution network line,has strong magnetic field,may cause lightning bolt on overhead line,therefore,should be performed on the 10 kV distribution line lightning protection design of Dalian area,it is necessa ry to modify 10 kV Dalian grid area,to reduce the lightning rate through the insulation level in this paper,by taking the installation of lightning arrester,adopt neutral grounding,a variety of methods to reduce the grounding resistance to improve the i nsulation level,to strengthen the lightning protection performance of Dalian area,in order to improve the lightning protection design of distribution lines.