Abstract
The determining factor for the efficient operation of electrical systems is their stability. To ensure stability, it is important to establish links between neighboring electrical systems, enhance the capacity of overloading and unloading power plants, improving the flexibility of power plants, etc. For electrical systems with high autonomy, it is also important to solve the problems of power control by the installations of the system itself, including the combined cycle power units, the main purpose of which is to cover the base load of the grid. The studies carried out by the authors of the article have shown that the tasks of regulating the load of electric power systems can be solved by using power units of a gas turbine combined cycle. In order to achieve this, it is required to identify and realize deep unloading capabilities of such power generating units. In standard conditions the combined cycle power generating units are utilized for covering base loads, and their participation in a daily regulation of the grid load is not considered. However, the concept of the combined power control method suggested by the authors of this article involves combination of quantitative and qualitative regulation methods of the gas turbine component which significantly expands the unloading range of such power generating units and increases their engagement in regulating the power system loads.
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