| In recent years,China’s economy has been developing rapidly,and the scale of China’s power grid is also constantly expanding and improving.These great changes are caused by the sharp increase in the electricity demand of various industries and residents year by year.The electric power industry is the basic industry of the national economy.As one of the main energy industries,it plays a very important role in the economic development.Therefore,as a necessary demand in daily life,all kinds of electricity customers in the society have also put forward higher requirements for power quality,especially for power supply reliability.Moreover,in actual operation,power supply reliability construction is a great test in power grid construction.It can be said that the purpose of improving power supply reliability of distribution network,transferring water supply and restoring capacity as much as possible is not only to improve power quality,but also to realize the development direction of "strong power grid".First of all,this paper introduces the current situation of power supply reliability research at home and abroad,and understands that the research of power supply reliability in China is behind that in developed countries,and there is still a long way to go in the research of power supply reliability.Secondly,the paper introduces and analyzes in detail the construction scale of power supply in dongguan city,the status quo of 10 k V and 0.4k V distribution network and the status quo of distribution automation,and summarizes the existing problems in dongguan city distribution network.Combined with the data statistics of power failure events of lines and cables occurred last year,this paper analyzes the power failure events and seriously studies the main causes of power failure events.Finally,this paper introduces influence of dongguan city distribution network power supply reliability of 5 kinds of evaluation index and the calculation method of calculate the relevant power supply reliability,by combining the fuzzy comprehensive evaluation method,analytic hierarchy process(ahp),and to construct membershipfunctions of related theory knowledge,comprehensive power supply capacity of dongguan city distribution network analysis and evaluation,according to the conclusions of the assessment,put forward the advice on how to improve the dongguan city distribution network power supply reliability and specific measures. |
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