Study On Power Grid Recovery Strategy After Accident

With the rapid development of the national economy,the scale of the power grid is getting larger and larger,especially the construction of the five vertical and five horizontal UHV power grid planned and constructed by the State Grid Corporation of China in recent years.All levels of power grids are more and more closely connected.The safe and stable operation of the power grid is related to the healthy operation of the national economy and the safety of people’s lives and property.However,in the actual operation of the power grid,no matter how safe the power grid is,it will fail due to the influence of internal and external factors.Therefore,how to recover the failure quickly and effectively after the failure is an important practical problem.It is an important task for power grid operators to quickly restore the normal operation of the power grid after a fault occurs.This paper first analyzes the main faults that may occur in the power grid and their solutions,introduces the fault diagnosis methods,in order to find out what faults occur.Research the fault location algorithm to find where the fault occurs;Finally,on the basis of accurately locating the type and location of the fault,the subsequent fault processing and power grid recovery are realized.Next,this paper studies the key technologies of power grid recovery after accidents.First of all,it is necessary to follow a certain fault processing process,and then analyze the power system after the failure of the treatment countermeasures,and for specific faults,put forward the corresponding solution technology.Then,the implementation method of fault location,processing and dispatching strategy is studied in combination with specific power grid.After a power grid failure,it may lead to a large area of power failure in an area and generate an isolated island.The isolated island task is formed on the basis of the analysis of the power grid wiring,and it is generated after the standby self-switching processing and electrical isolation failure.In this paper,"electricity island and boundary conditions" as a path search strategy,with the help of it constantly search for the charged state of the electricity island opposite the boundary conditions,so as to quickly get the restoration of power supply path.Finally,the paper designs a set of accident treatment system,the system acquisition signal and displacement signal of breaker and switch,including the microcomputer protection operation and fault information and other data,remote measurement,and after preliminary processing of the data and information to repeating the transmission signal,and identification of false alarm signals and normal operation,will eventually be processed data as grid accident analysis of the data source.The basic functions of the fault management system include fault information collection and integration,fault comprehensive analysis,abnormal alarm,fault isolation,fault recovery and plan design.And the actual case is verified.