Optimization Strategy of Sliding Pressure, Condensated Water Control and Coordinated Control System
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Abstract
As the contradiction between power supply and demand of our country gradually easing, annual utilization hours of generating units decreasing year by year, running in low load condition for a long time, it has been caused the unit thermal economy continue to decrease, unable to meet our country's need for energy saving and improving productivity. This paper concentrated on optimization of sliding pressure for low load operation generating units. The optimization scheme of sliding pressure control technology based on optimum valve-point was studied. The optimization strategy accelerating the response of main steam pressure and the throttling technique of condensed water is adopted in CCS that can not only improve the operation efficiency of the generating unit under low load condition, but also ensure the unit to promptly and rapidly respond the load change requirement during the variable load process. The result of this study shows that the optimization strategy of sliding pressure control technology based on optimum valve-point and the coordinated control system can effectively improve the operation efficiency and control quality of the unit under low load operation condition, and can be popularized and applied in other generating units in china.
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