A Model-free Control Strategy for Battery Energy Storage with an Application to Power Accommodation

Modeling of battery energy storage applied in photovoltaic (PV) grid-connected system with its power accommodation via advanced controllers is a challenging task since complex features and adjustment difficulties. For the sake of it, a model-free control strategy with intelligent proportional-integral controller and tracking differentiator has been put forward. The design approach of the proposed model-free controller has also been represented in detail and applied in power accommodation. Simulations on a battery energy storage system and comparisons with traditional PI controllers are reported. Compared with PI controller, the proposed strategy has achieved the perfect control performance.