Research On Simulation And Setting Calculation Of Partial Or Total Loss Of Excitation Protection For Large Generator

With the power industry develops and the capacity of single generator grows, the large generator-transformer units play more important roles in power system, and the demands for higher performance of large generator protection is necessary. For synchronous generator, loss of excitation is a serious fault and the corresponding protection often refuse to operate or maloperate. It's important for us to analyze the dynamic excitation-loss process precisely. In this paper, by use of the selected blocks from Power System Library in Matlab, the author sets up a generator-infinite system and simulates the loss of excitation fault. Based on the simulation, the author analyzes the dynamic process and gives reasonable explanation. Then the author uses a three-layer ANN to distinguish excitation-loss fault, and brings forward a scheme of excitation-loss protection using ANN for generator. Finally, the author discusses the setting calculation software for generator, and design the part of setting calculation software including partial or total loss of excitation protection.