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 EPE-PEMC 2004 - Topic 12-5: Generator excitation systems 
 You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2004 - Conference > EPE-PEMC 2004 - Topic 12: POWER ELECTRONICS IN GENERATION, TRANSMISSION AND DISTRIBUTION OF ELECTRICAL ENERGY > EPE-PEMC 2004 - Topic 12-5: Generator excitation systems 
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   Comparison Of Different Methods Of Excitation Control For A Synchronous Generator 
 By Neven Bulic, Gorislav Erceg, Tomislav Idzotic 
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Abstract: Two different way of excitation control 75 kVA synchronous generator is considered in this article. First way is with adaptive neuron and the other way is with PI controller. This is simulation and experiment of real synchronous generator connected on the network with reactance X=17 %.

 
   Comparison Of The Excitation Control Of A Synchronous Generator With Fuzzy Logic Controller And PI Voltage Controller 
 By Damir Sumina, Gorislav Erceg, Tomislav Idzotic 
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Abstract: This article is focused on the simulation and implementation of simple fuzzy logic excitation control of a synchronous generator. In MATLAB/SIMULINK is simulated model of the synchronous generator connected to an AC system. A simple fuzzy logic control scheme is simulated for voltage control and generator stabilization. This simulation is compared with the behaviour of the real laboratory model, which include digital regulation system (based on four DSPs) and synchronous generator connected to an AC system. The behaviour of the excitation system with fuzzy logic controller is compared with excitation system based on the PI voltage controller.

 
   Limitation Of Minimal Excitation Current By Load Angle Regulation 
 By Tomislav Idzotic, Gorislav Erceg, Damir Sumina 
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Abstract: A synchronous generator connected to an AC system in capacitive operating mode is near its stability limit. In such conditions, if some disturbances in the system appear, a synchronous generator could lose the synchronism. The classical solution of this problem is to keep a generator in stabile operating range of P-Q diagram by limiting the minimal excitation current. This article analysis impact of additional control algorithms which are included in classical excitation regulation system with the purposes of keeping a generator in synchronism when some disturbances appear and generator is near its stability limit. These control algorithms include load angle estimation by corresponding P-Q diagram and load angle regulator which task is to keep the load angle of a synchronous generator operating in capacitive mode on the reference value so that generator remains in synchronism.