Coordinated control of battery energy storage system and diesel generator for isolated power system stabilization

Nowadays, renewable energy such as wind turbine generator and photovoltaic system are introduced in power system. Output power fluctuations of these generation systems will result in frequency deviations and terminal voltage fluctuations. In order to overcome these problems, battery energy storage system is used for frequency and voltage control. However, it needs large capacity of battery system which increase the equipment cost. In this paper, we propose the coordinated control strategy between diesel generator and battery system for reducing the equipment cost of battery, inverter capacity and storage capacity. The proposed control system incorporates H_infin control theory which enables intuitive controller design in frequency domain. The effectiveness of the proposed control system is validated by simulation results in MATLAB.