Research On Comprehensive Weight Safety Assessment Method Of Urban Power Supply System

The importance of urban power supply system as the power transmission system of the city is beyond doubt.If the power supply of urban power supply system is interrupted by some risk factors,it will bring great harm to the normal operation of the power grid and the safety of electrical equipment,and even endanger the stability of the whole power grid.Therefore,how to evaluate the security level of urban power supply system and make reasonable dispatching decision and emergency plan based on it is the research focus of power security at present.This paper expounds the basic concepts and methods of security assessment of urban power supply system,and expounds the basic theory of security assessment of urban power supply system.Based on the analysis of urban power supply system security evaluation and the actual field data,a set of general index system suitable for urban power supply system security evaluation is established.The index system includes four criteria level indexes and 16 scheme level indexes,which are used for the calculation and analysis of the improved level analysis model based on the comprehensive weight.Aiming at the problem that there are too many subjective factors and too many accidental factors in the existing urban power supply system security evaluation methods,this paper studies the game theory comprehensive method combining the improved AHP and entropy weight method to establish the urban power supply system security evaluation model.The comprehensive weight is calculated by the game theory comprehensive method combining the improved analytic hierarchy process and entropy weight method,and the weight ratio of the security evaluation index of the urban power supply system is analyzed by the comprehensive weight.Finally,the overall risk degree of the urban power supply system is given by the fuzzy comprehensive evaluation method combined with the overall analysis of the comprehensive weight.Experiments show that it is feasible to use this method to evaluate the security of a city’s power supply system.Through this evaluation method,we can find the main security factors and the overall operation status that affect the stable operation of the city’s power supply systemFigure[10]table[20]reference[62]...