Assessment And Optimization Of Power Grid Emergency Capability Based On Adaptive Weight

There are many factors affecting the stable operation of the power grid,which can be divided into natural factors,human factors,and equipment failure factors.The intertwining of multiple factors has led to blackouts at home and abroad from time to time.The power grid serves as an important foundation to support the normal production and operation of society,once a power outage occurs,it will seriously affect people’s lives and cause huge losses.However,because the power system is a complex and large network,it is extremely difficult to fundamentally prevent the occurrence of power outages.Even if the power outage cannot be completely avoided,proper emergency work can still reduce the probability of the accident and the losses caused by the accident.Therefore,it is urgently needed to carry out power grid emergency capability assessment and optimization research to better cope with sudden power accidents.Based on this,this paper studies the power grid emergency capability assessment method,scenario-based emergency drill assessment method,and emergency response capability characteristics in a resilient grid environment.The main research contents are as follows:Firstly,a basic evaluation index system for the emergency capability of the power grid is established,and a weight determination model for the basic evaluation index of the emergency capability is established.The emergency capability of the power grid was disassembled based on the time and space dimensions of the scenario,and the construction of the basic evaluation index system for the emergency capability of the power grid was completed;The G1-cloud model was used to assign weights to the established indicators to make the indicator weight values as reasonable as possible;Through the analysis of examples,the results of the index weight assignment are determined,which lays a solid foundation for the establishment of the power grid emergency capability assessment model.Secondly,the quantitative method of power grid emergency capability index is studied,and the power grid emergency capability assessment model is established.Taking into account the dynamics of the index quantification criteria due to the development differences of the objects,the triangular fuzzy numbers are used to quantify the indexes,and an optimization model that can aggregate multiple fuzzy numbers is established.At the same time,in order to facilitate the establishment of the power grid emergency capability assessment model,the α-cut set is used to process the optimized triangular fuzzy number to obtain the final quantitative index result.Based on the index weight assignment and index quantification,a fuzzy-two-stage super-efficiency SBM model considering the index weight is established to achieve a static evaluation of the effectiveness of the emergency capacity of the power grid in a single time dimension;Based on the dismantling of the time dimension,a dynamic comprehensive evaluation model of the emergency capability of the power grid was established to achieve the overall evaluation and ranking of emergency capabilities,making the evaluation results more scientific and reasonable.Finally,an example analysis is performed to verify the effectiveness and feasibility of the method proposed in the power grid emergency capability assessment.Then,aiming at the characteristics of emergency drills as an assessment method and a verification method for the implementation of emergency capabilities and the possible problems in the emergency response process can be found,the evaluation methods are studied.Considering that the exercise is a flow-based activity accompanied by scenario characteristics,and the diversity of exercise methods prevents the establishment of unified evaluation indicators,the Petri net is used to represent the exercise activity process to better perform emergency exercise indicators.In order to achieve the level judgment of the emergency drill performance,the matter element extension method was used to build the exercise evaluation model.The 10 k V live work drill was used to analyze the example,and the method proposed in the article was explained in detail.The analysis of the calculation results shows that the method proposed in this paper can effectively find the deficiencies in the emergency drill disposal process,and achieve the assessment and verification of emergency capabilities.Finally,the supporting role of the construction of a resilient power grid to improve the emergency capabilities of the power grid is studied.The definition and characteristic quantities of the resilient power grid are introduced.From the perspective of improving the resilience of the power grid and the emergency capacity of the power grid,the auxiliary conditions for improving the emergency capacity in the context of resilient power grid construction are studied.The basic elements provided by the emergency capability of the power grid,this shows that the resilient power grid has a positive effect on improving emergency response capacity,which brings new ideas for improving emergency response level.