Sequential timestep unit commitment

This paper presents a method for solving the unit commitment problem sequentially in time. By decomposing the problem in time, each timestep is solved individually using a free market model of the power system. The corresponding market clearing handles both energy demand, primary reserve demand and secondary reserve demand, and is performed using an extended economic dispatch algorithm that determines both the unit dispatch decisions and the unit commitment decisions. The paper focuses on describing the formulation and the solution of the problem, and includes explicit formulations of both the unit dispatch decision and the unit commitment decision as functions of the system prices. Comparisons with results provided by other methods show that the method is very competitive.