The research on transformer IED excitation source

Intelligent Electronic Device (IED)excitation source is generated by the excitation signal simulator, by simulating various operating states of intelligenthigh-voltage equipment and the typical failure to achieve the over all joint detection in the laboratory environment. In this paper, we study the transformer IED excitation source, which including a)On-load tap control IED excitation source: to design the model of load switch´s main state parameters by studying the model of the transformer´s switch status, which can truly reflect the information of on-load tap switch status, including stall information and operating mechanism status. b)Cooling device control IED excitation source: to design the model of the cooling device´s main state parameters, which can simulate fan operation, pump operation, alarm etc. c) Core ground current measure IED excitation source: its model can simulate the coreground current of 0-10A. When overall detection, string the IED excitation source in to the ground transformer core current sensor to detect in non-normal state. d)Casing monitor IED excitation source: simulating casing dielectric loss value, casing leakage current and casing invasion wave state by designing the transformer casing´s main state parameters. In conclusion, through the research of stability control scheme of IED excitation source, this paper developed various types of transformer IED excitation source analog devices based on the data acquisition and control system of Industrial Personal Computer (IPC). The IED excitation source simulation device is used for smart high-voltage equipment laboratory overall joint detection, which is of great significance to guarantee the normal operation of electrical equipment and power system.