Power allocation method of battery energy storage system considering state balance in smoothing photovoltaic power fluctuations

Aiming at the imbalances of SOC (state charge, SOC) and SOH health, SOH) for battery energy storage system (BESS) in smoothing photovoltaic power fluctuations, a allocation method BESS is proposed. Firstly, hierarchical structure given, including acquisition grid-connected reference double-layer strategy BESS. Secondly, swing door trend algorithm optimized by improved Aquila optimizer devised used to deal with raw obtain signal. Next, dynamic grouping principle considering units devised, designed terms results units. Finally, proposed simulated through actual data, compared other methods show that it can smooth fluctuations more effectively, be balanced quickly accurately, which verifies its effectiveness.