Impact of Integrating Solar Generation in Power Systems with Battery Energy Storage

With the increasing penetration of intermittent solar energy in the power system, it is common to utilize battery energy storage to mitigate the variation and fluctuation injected by the solar power. However, the integration of solar power can influence the scheduling of thermal generation and battery charging and discharging, which can further impact the power system operation in terms of operational and economics aspects. To study this impact, in this paper, an optimal scheduling model is proposed that considers the scheduling of battery and thermal generation under solar power penetration. Actual solar power output data of the summer season is applied to the proposed model for simulation. Furthermore, to approximate the stochastic nature of solar power, a method is proposed to randomly generate solar power profiles and Monte-Carlo simulations are carried out on the proposed model. By simulations on IEEE 118-bus system, it is demonstrated that integrating solar power can help to reduce system operation cost, balance the peak load during the noon, and saves battery discharging energy for balancing evening peak load.