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A Stochastic Optimal Dispatching for Thermal-Wind-Hydro-Storage Power System Considering Cascaded Hydropower System

With the massive construction of wind plants in the power system, the power balance is getting more and more difficult to maintain because of the uncertainties bringing by wind power. However, the above problems can be greatly alleviated by introducing a variety of flexible resources such as cascaded hydropower system (CHS) and energy storage. Therefore, a stochastic optimal dispatching model considering CHS and energy storage is proposed. Further, participation of thermal power plants (TPPs) in deep peak regulation is considered in the model which can improve the flexibility of the grid. The proposed model is performed through a modified 24-node test system with the CHS in the Wujiang River. The numerical result shows that the proposed method can improve renewable energy accommodation.