Research And Design Of Risk Prevention & Control And Fault Processing System For Regional Power Grid In Taiyuan

With the rapid development of power grid,State Grid Corporation of China puts forward to consturct the unified strong smart power grid with Ultra-High Voltage(UHV)as backbone network and coordinated development of multi-level voltage grid,which uses intelligent technology to achieve the requirement and purpose of enhancing the level of safety production management.Under this background,this thesis standardizes the risk identification,assessment,control and other related work to intensify the risk management of regional power grid in Taiyuan,which will comprehensively improve the level of power grid operation control and ensure the safe and stable operation of power grid and reliable power supply.It alse helps to offer a integrated service,combined with risk precontrol as the motivation,process management as the core,data analysis as the support and power safety production as the goal,aiming at meeting the demand of intelligently identifying,preventing and controlling the risk from power grid,equipment,environment,people and so on,focusing effort on the risk prevention,and improving safety management level.According to the operation of regional power grid in Taiyuan,this thesis proposes a method of risk identification,assessment,prevention and control by studying the risk characteristics of regional power grid,builds the topology models of power grid equipments to automatic determine and locate the power grid fault and choose the optimal way of fault recovery,studies the rapid processing technology of grid fault section to realize efficient fault records and retrieval,establishes a comprehensive control system of risk and fault to achieve the requirements of risk prevention and precontrol as well as real-time fault processing after studying the regional power grid risk prevention & control and fault processing method.In the assistant decision-making of risk source identification and risk precontrol of regional power grid in Taiyuan,an alternate verification algorithm of risk and control measures is proposed,which applies the technique of Markoff(Markov)fusion theory and clustering.First,obtain the most similar risk cluster to the new risk sources,and then,get the best risk prevention and control measures through the state transition matrix analysis.Besides,a double close-looped management system of risk control is established,one is the whole process close-looped mechanism of risk identification,assessment,identification,prevention,control and elimination established in the control flow and technology application,the other is the comprehensive analysis close-looped mechanism of fault database,model,precontrol and professional analysis database.By establishing a scheme storehouse of real-time adaptive recovery for power grid fault,this thesis constructes a recovery scheme evaluation system based on multiple factors and multiple weights to provide a variety of fault recovery schemes.These schemes basicly contain all possible means of fault recovery used in the regional powr grid operation,including self power supply scheme,external power supply scheme,two partition scheme,three partition scheme,load transfer scheme,load shedding scheme,etc.The evaluation system can help dispatchers to get the optimal fault recovery scheme as fast as possible.This thesis also establishes a platform of the risk prevention & control and fault processing to realize the comprehensive control of risk and fault,and to achieve the requirements of risk prevention and precontrol as well as real-time fault processing.Focusing on the risk analysis and fault comprehensive control of the regional power grid in Taiyuan,this thesis proposes some solutions and precautions which could provide some valuable references for risk prevention & control and fault instant processing.