Analysis And Research Of VQC Systems Running For Pu Dong Area

In recent years,the power quality problems have become more and more attention.Voltage quality is one of the main indicators of power quality.Voltage quality directly affects the safety and stability of power system and economic operation,and is very important for power companies to provide quality services.Based on the voltage quality problem in Pudong,this paper analyzes the problems and voltage quality in distribution network.Through analyzing the basic principle and structure of VQC system,this paper studies the problems existing in the operation of VQC system in Pudong,and puts forward the improvement scheme of improving voltage quality and VQC system.Firstly,we analyze the basic principles and structure of VQC system,and the application of VQC system in power system,and then study the voltage quality management and voltage quality in Pudong,and the coverage of VQC system in Pudong area,and four typical action logic statements of VQC system.Analyze typical VQC control flow chart of Pudong area,and the action logic of Station Mingyue and Station Jiafeng.Then,the problems of voltage quality management and the common problems of VQC system in Pudong region,system verification and processing,as well as the common problems in other pressure control system are studied.In view of the voltage mutation caused by the load disturbance and the load disturbance in substation automation system,the VQC inverse time limit curve is introduced to improve the response speed of VQC voltage regulation.According to the problems of VCQ system,the improvement scheme of VQC is proposed,which includes the blocking logic and the logic of PT standby.Through the test of the typical substation site,the paper verifies the effectiveness of the proposed scheme and the coordination control strategy.