Congestion Influence on Bidding Strategies in an Electricity Market

In this paper, a bidding strategy is developed from the viewpoint of utility wishing to maximize its profit in a congestion environment. The proposed algorithm is formulated as a two steps optimization problem. At the first step, a bidding strategy is solved to maximize its expected profit, and at the second step, a curtailment strategy will be perform to maximize the participant´s profit when the system occurs the transmission congestion. An immune algorithm (RIA) with scale scheme system (SSS) is proposed to solve the optimization problem. It has advantages and some characteristics to show a better performance than many other algorithms. The IEEE 30 bus is selected for test. Simulation results have a good result with this standard to obtain an optimal bidding strategy for electricity suppliers under the congestion environment