Journal of System Simulation ›› 2015, Vol. 27 ›› Issue (7): 1532-1540.

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Parameter Optimization on Coordinated Control System of Thermal Power Units in High Rate Variable Load Operation Mode

Tian Liang1, Liu Fang2, Liu Xinping1, Liu Jizhen1   

  1. 1. North China Electric Power University, Changping District, State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources, Beijing 102206, China,
    2. Repair and Test Department of Ordos Electric Power Bureau, Ordos 017010, China
  • Received:2014-07-17 Revised:2014-12-18 Online:2015-07-08 Published:2020-07-31

Abstract: The frequent fluctuations and rapid change of power grid generating load instruction cause the deterioration of control quality of generating load and throttle pressure in thermal power units. To solve this problem, a trial and error method, the parameters adjustment range of which could be quantified, was proposed. Based on the model of controlled object, the initial value of controller parameters were set conservatively. By calculating the difference between current value and the target value of load change rate, the optimization times were determined, the PID controller parameters optimization method of coordinated control system was studied, and the effectiveness of this method has been proved in theory. The application in a 600MW unit shows that the control quality of generating load and throttle pressure were improved obviously.

Key words: thermal power unit, coordinated control, parameter optimization, trial-and-error method, mathematical analysis

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