Design and operation optimization of solar distributed energy supply system based on dynamic operation strategy

This research proposes a dynamic operation strategy that allocates photovoltaic surplus electricity to energy storage batteries and municipal grids in a variable proportion, and establishes a joint optimization model for the design and operation of grid-connected solar distributed energy supply systems based on this strategy, the model is optimized based on the genetic algorithm under different time-of-use electricity prices, and the system operation results under the dynamic operation strategy and the control operation strategy (the remaining power is connected to the grid first or the energy storage battery is allocated first) are compared and analyzed. Taking a typical residential building in a village in Shaanxi as an example, the results show that: 1)When the peak-to-valley price difference of the time-of-use electricity price is large, the dynamic operation strategy can effectively reduce the cost of solar distributed energy supply system; 2)The peak-to-valley price difference of the time-of-use electricity price is relatively dynamic, the capacity configuration of the energy storage battery under the operating strategy has a greater impact: the greater the peak-to-valley price difference, the greater the configuration capacity of the energy storage battery; 3)The impact of photovoltaic kilowatt-hours subsidies on the system cost under the three operating strategies is: dynamic operating strategy>Strategy B (remaining power is allocated to energy storage batteries first)>Strategy A (remaining power is first connected to the grid). © 2022, Solar Energy Periodical Office Co., Ltd. All right reserved.