The Key Technology And Application Of Automatic Voltage Control Based On EMS

With the development of the smart grid dispatching automation technology,the requirements of the modern power grid for the dispatching automation are not only restricted to the real-time acquisition and monitoring of the remote information of the substations any more.Dispatching automation system should provide more power application software in order to ensure the safety,economy,reliability,quality and environmental protection of power supply.Regarding the power application software,Automatic Voltage Control(AVC)is one of the advanced ones.To address the above problems,this paper proposes a method of AVC adjustment sensitivity computation and its application based on historical data of Energy Management System(EMS).In order to calculate the AVC adjustment sensitivity,the writer obtains the telemetry data section through the analysis of the message file between the substations and the master station,as well as find out the telemetry data section that before and after the AVC operational moment by combining the AVC operation history.In addition,the writer makes the statistics and analysis on the AVC adjustment sensitivity based on operation history in order to calculate the correction value,then make the comparison between this correction value and empirical values in EMS system.This method can realize the correction of the manual input data by actual operation data.Besides,this paper also makes a preliminary exploration on the variation characteristics of the AVC adjustment sensitivity in different time periods by doing the correlation analysis of the correction value and the transformer load of the substations.Besides,analysis of change of AVC adjustment under different operating scene based on the historical data is extended.