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This article analyzes the different type of large synchronous generator excitation system and discussed the adaptability of the excitation system model of PSASP. A self-excitation model and a three machine excitation model is modeled and simulated, which proves the accuracy of PSASP model. Introduction Large generators excitation control system have a significant impact on the static stability, dynamic stability and transient stability of the power system. The results of power system stability calculation will very different when Using different excitation system model and parameters. Therefor we need more accurate mathematical model and parameters that can properly reflect the actual operating state of the equipment, making the results reliable. Providing accurate data for power system stability analysis and daily production scheduling by testing generator excitation system model and parameters will effectively guarantee the security and stability of Gird operation and improve labor productivity, which has important social significance and economic benefits . In this paper, a large synchronous generator excitation system model is established through the research on the model of large generator excitation system and simulation tools PSASP, and accuracy of the model is verified by simulation analysis. Synchronous Generator Excitation System Overview Generator excitation system consists of excitation power section, excitation control section, generators voltage measurement, reactive current compensation section and power system stabilizer (PSS), as shown in Fig1. Fig.1 Components of synchronous generator excitation system Excitation system can be divided into DC exciter excitation system, AC exciter excitation system and static excitation systems according to different power components. Common generator excitation system can be subdivided as shown in Table 1. 4th International Conference on Mechatronics, Materials, Chemistry and Computer Engineering (ICMMCCE 2015) © 2015. The authors Published by Atlantis Press 2700 Table.1 Common classification of synchronous generator excitation system Exciter Type Whether the rectifier controlled Whether has pilot exciter Brush /no Bush DC / / /

Modeling and Simulation of Large Synchronous Generator Excitation System with PSASP