Research On The Failure Rate Of Medium Voltage Distribution Network In Shaoguan City And Practice Of Reducing Measures

In recent years,the state has issued a series of policies,which put forward new missions and requirements for deepening the reform of the electric power system,and the voice of all sectors of the society for accelerating the reform of the electric power system is also growing.Under this series of reforms,the monopoly position of the power grid enterprises in the electric power trading market has been broken,and the special commodity of electric power has been commercialized.The power market share of power grid enterprises is constantly eroded,and they are facing more and more operating pressure,which may even be eliminated by the market.As a typical power grid enterprise,Guangdong Shaoguan Urban Power Supply Bureau of China Southern Power Grid must keep pace with the reform,change the old thinking,improve the power quality,improve the reliability of power supply,reduce the failure rate of distribution network,improve the service level,optimize the power business environment,improve the power acquisition index of customers,create more value for customers,and enhance customer loyalty in order to achieve the goal of improving the power supply quality and reliability In the tide of market-oriented power,we can get a glimmer of vitality.Distribution system is an important part of the terminal in the whole power system,which supplies and distributes power directly to customers.he number of distribution line equipment is large and widely distributed.Once there is a fault outage,he loss and impact can not be ignored,which has the greatest impact on the reliability of power supply for users.Shaoguan is located in the mountainous area of northern Guangdong.The medium voltage distribution network adopts 10 KV voltage level.For many years,the investment in the incoming power network has the problems of "focusing on the main network,ignoring the distribution network" and "focusing on power transmission and transformation,ignoring the distribution network".The development of the distribution network is relatively backward compared with the Pearl River Delta region.The failure rate of Shaoguan urban power supply bureau is still high,which can not meet the high reliability demand of the society.Through the research and exploration of the methods to reduce the failure rate of medium voltage distribution network,it can improve the reliability of power supply,improve the rate of transfer,narrow the scope of power failure and reduce the impact of power failure,which has great social and economic benefits.Based on the historical operation data of the distribution network in Shaoguan City and the practical work experience,this paper summarizes the problem of high failure rate through the detailed analysis of the historical failure data of the power supply bureau in Shaoguan City,and makes technical analysis on the line arrester,cable accessories and other high failure equipment,studies and discusses the methods of reducing the failure rate of the medium voltage distribution network and the time of failure and power failure In the aspect of management,it summarizes a set of management methods from planning,implementation,supervision,assessment,review,improvement and promotion.After one year of actual operation,it is proved to be effective.These measures provide relevant working experience of distribution network operation and reliability management improvement.Hope to reduce the medium voltage failure rate to improve the competitiveness of power supply enterprises have a positive impact,and to other county-level power supply enterprises of medium voltage distribution network management to provide some reference.