Abstract:

This paper proposes a three-level co-optimization model for determining energy production and regulation reserve schedule in a day-ahead market by minimizing the total cost of unit commitment, generation dispatch, frequency regulation and performance. The unscented transformation and historical profiles are used to generate scenarios for modelling the fluctuations of intermittent renewable and stochastic loads at different time scales. Through detailed modelling and simulation of generation dispatch and frequency regulation, the determined generation schedule can have sufficient reserve capacity and adequate response speed to deal with the renewable and load variations occurred between shorter dispatching and regulating intervals, as well as longer scheduling intervals. Numerical results on a 5-bus sample system are given to demonstrate the effectiveness of proposed method.