Energy storage design for primary frequency control for islanding micro grid

This paper presents a methodology which allows designing an energy storage device to prevent frequency instability of islanding power network. Then, energy storage will be able to stabilize frequency of the power system by limiting the frequency deviation to be within an acceptable range after occurrence of any disturbance. Principle of energy storage had been first elaborated to select a suitable model. Trials on influencing variables, such as rated power, droop value, and technology of energy storage were undertaken to find out their effects. The results show that the energy storage is likely to be an effective device for the controlling of frequency deviation. Its effectiveness is depending upon the earlier mentioned variables. However, proper calculation for a suitable value of the rated power happened to be the prime requirement of the design for an appropriate energy storage system.