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Load Following Operation Improvement by Governor Control Logic Modification of Thermal Power Plant (System Frequency Drop Prevention)  

Lee, Jong-Ha ((주)한국남동발전 여수화력발전처)
Kim, Tae-Woong (경상대 제어계측공학과)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.11, no.4, 2006 , pp. 302-306 More about this Journal
Abstract
The improvement of load following operation of the thermal power plant is influenced to the electrical quality. Analysis of boiler, turbine, and governor system, and the study of control algorithm are necessarily preceded. The thermal power plant is operated by various control systems. In the case of faulty governor system, it takes long days to solve the problem and impossible to repair the mechanism without outage. A non-planned outage is taken into consideration because of economical power production. The paper introduces the followings; In case of system-frequency drop during long term, at 500MW thermal power plant, the generator output was drop. To clear this problem, the control logic is modified with analysis of trend and control algorithm. As a result system frequency drop is prevented during the long tenn and the electric grid operation is improved.
Keywords
Power plant; Governor; Control logic; System-frequency; Speed droop curve;
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