Energy management at the distribution grid using a Battery Energy Storage System (BESS)

• BESS is utilized to manage intermittent renewable resources on a power system addressing circuit and system level issues.
• Optimization algorithm for the charging and discharging of a BESS connected to grid with high renewables penetration.
• BESS is used for peak load shaving and power curve smoothing of a distribution grid load.
• Simulation results on the BESS in Maui grid are used to validate the proposed method.

In 2008, the State of Hawaii initiated a clean energy initiative that set an ultimate goal of 70% clean energy by 2030 (40% from renewable energy and 30% from energy efficiency). A controllable Battery Energy Storage Systems (BESSs) can be used to manage intermittent renewable resources on a power system to address both circuit and system level issues. Simulation and experimental results of applying a novel algorithm for the charging and discharging of a BESS are presented, using actual grid data for controlling a BESS for the purpose of peak load shaving, power curve smoothing, and voltage regulation of a distribution transformer. Two optimization objectives for peak shaving are presented in which proposed load forecasting methods are used. The application of a BESS for voltage regulation is examined and analyzed with different tests, and the observed results are discussed.