Determination of variation in efficiency of a 200 MW unit when it operates in the load control mode
Experiments were performed to determine the influence of the control mode of a thermal power plant in service on its efficiency. Experiments were carried out on a 200 MW unit with a drum steam generator operating on gas. To conduct the experiment a procedure was developed with provision for determining variations in efficiency of the generating unit by the direct balance method. The procedure was developed in order to determine the influence of a generating unit of two parameters of its control mode: the amplitude and period of the disturbances passing to the thermal power plant, (ThPs), from the automatic equipment of the power system. The procedure was developed on the assumption that dependence of efficiency on the period of fluctuations has only one extremum. In accordance with this the plan of the experiment was such that it should be possible to represent its results in the form of a power series convenient for subsequent use. On the basis of the test results it was concluded that the efficiency of a ThPs apart from the very fact of changing the plant to operation in the control mode and apart from the parameters of this mode is mainly affected by the structure and adjustment of the circuits of the interacting control systems of individual process parameters on which the form of the frequency characteristic of variation in efficiency depends. Therefore, the structure and adjustment of control systems of power and of process parameters of a generating unit, forming in the end a single complex of control of power of the generating unit, should be selected with allowance for the actual or assigned spectrum of control actions passing to the station from the automatic equipment of the power supply system.
- Research Organization:
- All-Union Scientific Research Inst. of Power Engineering, Moscow
- OSTI ID:
- 5201813
- Journal Information:
- Therm. Eng. (USSR) (Engl. Transl.); (United States), Vol. 22:11; Other Information: Translated from Teploenergetika; 22: No. 11, 27-32(Nov 1975)
- Country of Publication:
- United States
- Language:
- English
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