Study On The Identification Method Of Common Faults In Power Systems

With the rapid development of modern economy and society,high-quality,reliable and stable power supply has become a common demand of power users,which is bound to require power supply enterprises to constantly improve the operation and maintenance capacity of the grid,and significantly shorten the time limit of fault analysis and disposal.However,the current domestic complex power system operating environment and frequent natural disasters and misoperation and other objective factors seriously restricted customer demand.If the local fault of power network is not dealt with in time,it may lead to the occurrence of power outage.This will not only have a huge impact on national economic development,but also threaten national security.Therefore,the contradiction between high-level power customer demand and relatively backward power supply is increasingly prominent.In order to solve this contradiction,this paper proposes a feasible fault analysis solution according to the actual situation of domestic power grid.On the one hand,it ensures the stable operation of the power grid.The main contents of this paper are as follows:1)Aiming at the main fault types in the power system,this paper adopts the artificial intelligence diagnosis methods such as expert system and Agent system that have been widely used in the power system to deal with the above faults rapidly and effectively.2)Based on the theory of wavelet transform,the problem of fault location and line selection of transmission lines is studied in depth.The short-circuit fault phenomenon of single-phase grounding of the small current grounding system is simulated,and the disposal capacity of wavelet transform theory in the field of power network fault analysis is verified.3)In order to quickly determine the fault type of power system,this paper establishes a fault diagnosis auxiliary analysis system for power system through fault recording technology and IEEE COMTRADE standard.The system can make use of relevant information more conveniently and quickly and make a correct judgment on the fault cause of power network,so as to improve the reliability and stability of power network operation.This paper hope through the above means,at the beginning of the power system failure,can quickly response,emergency handling,reduce the fault scale,shortening the time of disposal of analysis and fault diagnosis,ensure the stable operation of power system,as well as grid control department,operation maintenance,maintenance staff,grid in finding the cause of the accident,to provide scientific and effective means of auxiliary analysis theory and disposition decision.