Thermal-Hydro-Renewable Joint Stochastic Dispatch Considering Hydro Unit Forbidden Zones and Renewable Curtailments

With the increased penetration of renewable energy sources in power systems, we need to strike a balance between rising consumption of renewable energy and secure power supply. This paper presents a thermal-hydro-renewable joint day-ahead dispatch model that produces reasonable renewable energy curtailment plans, which improves the power dispatching and reserve allocation under controlled risk. The new strategy to constrain crossing of forbidden zones in hydro unit guarantees the security and economy. The numerical test on a modified system from actual power grids is conducted to validate the efficiency of the proposed model. The results show our framework can effectively reduce operational costs as well as consider the regular forbidden zone crossing constraints of hydro units.