Dynamic power management of PV based islanded microgrid using hybrid energy storage

摘要

This paper presents the power management scheme of PV based islanded microgrid using battery and supercapacitor hybrid energy storage under dynamic load conditions. The energy management scheme employs hysteresis controlled bidirectional dc-dc converter for battery and supercapacitor. The constant power fluctuations are compensated using battery as energy buffer while transient power fluctuations are compensated using supercapacitor as energy buffer. The three phase VSC supplying dynamic load power is decoupled controlled to regulate voltage and frequency of the ac bus. The proposed control scheme enhances the battery life and manages the power variations under varying irradiance conditions without losing MPPT of PV system.