Research On Safety Risk Assessment Method Of Active Distribution Network Based On Situational Awareness

In recent years,with the access to a large number of distributed energy sources and the increase in power demand,new risks and tests have been brought to the safe and stable operation of the distribution network.In order to change from passive to active,the active distribution network should be fully utilized.Therefore,this article uses situational awareness technology to study the security risk assessment method of active distribution network.Among them,the active distribution network situation awareness technology is mainly divided into three aspects: situation element collection,situation understanding and situation prediction.In this paper,the situational elements of active distribution network are collected mainly to select evaluation targets and evaluation indicators,and then establish an evaluation system framework for evaluation indicators.The situation understanding of the active distribution network is mainly based on the collection of situation elements and the selection of evaluation targets and evaluation indicators for risk assessment.The situation prediction of the active distribution network is mainly the risk prediction of the operation situation.The main tasks completed in this paper are as follows:In terms of the risk evaluation of active distribution network based on situational awareness,this paper uses the analytic hierarchy process based on the index scaling method to divide the factors affecting safe and stable operation into three evaluation levels.A total of 24 specific evaluation indicators are evaluated to find out.Weaknesses in the regional distribution network.In terms of the risk prediction of active distribution network based on situational awareness,this paper uses the improved big data association rule algorithm Apriori to conduct big data mining of association rules between environmental factors and historical fault data,and dig out the rules between environmental factors and historical fault data.,And then use real-time environmental data to match,and then predict where the failure may occur.At the same time,this article also introduces the severity level of failure prediction to facilitate the prediction of the severity of the upcoming failure and provide a safe,reliable,fast and feasible maintenance program for operation and maintenance.Based on the research of evaluation and prediction,this paper establishes an active distribution network security risk assessment system,which makes the planning,construction,reconstruction and optimization of the distribution network more targeted,and the distribution of risk levels can be more intuitive.