Real-time Control Based on Power Hierarchy for Photovoltaic-storage-charging Distribution Substation

The “light storage charging” distribution radio area is an important form of future urban power distribution, and one of its key technologies is real-time control technology centered on power regulation. A hierarchical power regulation strategy for the “optical storage charging” distribution station area with the goal of safety and economy is proposed. The control strategy for the grid connection mode in the distribution station area is further divided into power support mode and peak valley arbitrage mode. And through the combination of energy storage system and voltage source converter(VSC), a power balance unit is constructed, and power layer zones are divided based on the magnitude of unbalanced power in the substation area, real-time electricity price, and energy storage charge state. The reference values of energy storage system and VSC power are given, and joint output optimization is carried out to achieve safe and economic operation of the substation area. In island mode, the use of electric vehicle to grid(V2G) technology as a supplement to the power regulation of the energy storage system increases the power regulation capability of the station area. Finally, a simulation model was built in Matlab/Simulink to verify the accuracy and practicality of the proposed control strategy.