Optimal bidding strategy of coordinated wind power and gas turbine units in real-time market using conditional value at risk

Abstract

Nowadays, the incorporation of wind power in electrical grids and electricity markets is grown. Due to the fluctuation of wind speed, one of the main challenges of wind power would be selling power directly to the wholesale markets. A method for solving this challenge is coordination of wind power with energy storages, cascaded hydro, or gas turbine units in bidding strategy and operation. By coordinating with gas turbine units, wind power can be incorporated in real-time markets with fewer capital costs. In this paper, a stochastic bi-level optimization is proposed for coordinated wind power and gas turbine units in the real-time market. The uncertainties of wind power, demands, rivals' biddings, and limitations of natural gas are considered. The optimal bidding strategy is determined by adding a barrier term into the objective function of the proposed optimization model. The added term is based on the concept of conditional value at risk.