Analysis And Research To Open-loop Operation Of Electromagnetic Loop In Nanning Power Grid

At home and abroad a series of major power grid accident analysis and summary report,all emphasize the importance of the power grid structure to the safe and stable operation of power grid,in this paper,from the perspective of power grid operation,this paper focuses on the main problems that may be caused by the electromagnetic loop network in the power grid structure:low voltage transmission network overload and thermal stability failure,system stability failure.At the same time,taking Nanning power grid as the object,the effect and influence of the open-loop solutions on the specific structure of Nanning power grid are analyzed,and the feasibility and effectiveness of the solution of the Nanning power grid are proved.In this paper,we first analyze the phenomenon of electromagnetic loop network in the grid,and the main problems that may arise,as well,listing the major power grid accidents caused by the phenomenon of electromagnetic loop at home and abroad,and its harm and influence,and,summarizing the analysis and discussion of the electromagnetic loop network at different levels in China,and emphasizing the necessity to pay attention to the analysis of the electromagnetic loop network in the operation of the power grid.Next,according to the operation rules and basic requirements of the power system in our country,we analyzes the basis and emphasis of the N-1 calibration method used in the local power grid.In view of the current electromagnetic loop network system should be appropriate to use the way to run the loop,the Nanning power grid operation analysis also put forward the specific solutions.Based on the analysis of electromagnetic loop network,this paper analyzes and proves the feasibility of the open-loop operation of the Nanning power grid.For detailed description of the main operating conditions of load points,this paper adopts the Guangxi power grid calculation model,focuses on the influence of 500kV transmission line in Guangxi power grid and Nanning power grid connected in to each node of 220kV transmission line in Nanning power grid,followed by Nanning power grid computing focuses on the influence of Nanning power grid 220kV network load of main city 110kV network model.Because of the Nanning power grid 35kV network and lOkV network can have a open-loop formed by the radial network(the backup power automatic device to ensure the reliability of power supply)operation,it will not necessary to analyze the problems of electromagnetic loop network voltage level in the two.This paper analyses and proves the feasibility and effectiveness of the open-loop solution adopted by Nanning power grid.It can be used as the theoretical basis for the solution of the Nanning power grid.