Research On Risk Assessement Of 500Kv Substation Equipment Based On Running Satates

500kV substation is a particularly important hub in the power grid.,the safety of its operation will affect the safe operation of a power grid.In this paper,the condition of electrical equipment is analyzed,the condition and risk of the electrical equipment are assessed that provide decision-making information to condition-based maintenance and electric power system operation.The main research work of this paper is as follows:(1)The background,significance and status of the status assessment and risk assessment of the 500kV substation are introduced from the perspective of the project research and engineering requirements;The research potential and value of electrical equipment status assessment and risk assessment are clarified from the aspect of state maintenance.The existing research is analyzed and summarized,and the existing problems are put forward,which will clear up the thinking and lay a foundation for the subsequent research.(2)In this paper expounds the internal correlation between the defects of electrical equipment,faults and the operation state of equipment and the operation risk of equipment,analyzes the state quantity reflecting the operation state of power transformers,and makes statistics and analysis of the defects and failures of electrical equipment,providing important decision-making information for the risk assessment of subsequent electrical equipment;(3)Using a single defect or fault judgment method is difficult to accurately assess substation electrical equipment running status and the deficiency of risk by using Analytic Hierarchy Process is put forward considering various defect types of state,to realize the condition assessment of transformer and electrical equipment of each evaluation index weight in the reasonable calculation,and the evaluation index in accordance with the unified relation with the running status of the equipment separately measure transformation,realize the scientific and reasonable evaluation of equipment running status;(4)Based on the realization of state evaluation of electrical equipment,the operation risk of electrical equipment in substation is evaluated considering the probability of fault occurrence of electrical equipment and the loss caused by fault,and the method of risk evaluation of electrical equipment is analyzed with an example.The research content is of great practical significance and application value for timely and accurately mastering the operation state of substation,controlling the operation risk of key and important equipment,ensuring the safe and stable operation of power grid,improving the efficiency of equipment use,guiding the operation and maintenance of electrical equipment.