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Control Algorithms of Large Synchronous Machines for Starting Gas Turbosets  

Hwang, Seon-Hwan (Department of Electrical Engineering, Pusan National University)
Kim, Jang-Mok (Department of Electrical Engineering, Pusan National University)
Ryu, Ho-Seon (Instrument & Control Group, Power Generation Lab., KEPRI)
Yoon, Gi-Gab (Advanced Distribution System Group, Distribution Power System Lab., KEPRI)
Publication Information
Journal of Power Electronics / v.9, no.2, 2009 , pp. 146-155 More about this Journal
Abstract
The static frequency converter (SFC) systems are used as a method of driving large synchronous machines in many power and industrial plants. In this paper, new control algorithms of SFC systems for starting gas turbo sets are proposed for a four quadrant operation: start-up at standstill; an acceleration up to the speed of the rated voltage; field weakening to reach the rated speed; synchronization to the main alternating current (AC) source; and dynamic braking to stop safely within the rating of the synchronous machine. Experimental results show that the proposed algorithms are proper and effective.
Keywords
Static frequency converter; Large synchronous machine; Gas turbosets; Four quadrant operation;
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