Quotation Strategy of Combined-Cycle Gas Turbine Considering Flexibility and Start-Stop Peak Shaving

This paper proposes a bilevel optimal scheduling model considering the flexibility and peak shaving benefits of gas-steam combined cycle units, which realizes “thermoelectric decoupling” and the flexibility of the unit by configuring electric boilers, and adds the benefit of peak shaving to the upper model to maximize the profit of the unit. Among them, the upper model is the unit optimal bidding model considering flexibility and peak shaving benefits, and the lower model is the power market-clearing model considering the maximization of social welfare. The bilayer model is transformed into a mixed-integer linear programming problem through KKT conditions and other solution methods. The effectiveness and rationality of the model are verified by the analysis of examples. The results of examples show that “thermoelectric decoupling” and start-stop peak shaving can effectively improve the profit of the gas-steam combined cycle unit and the wind power consumption capacity of the system. Finally, the strategic bidding behavior of gas-steam combined cycle units in different periods of the power market is explored.