HYBRID DSTATCOM BASED ON SUPERCAPACITORS & BATTERIES FOR PERFORMANCE IMPROVEMENT OF DISTRIBUTION NETWORK
Professor, Dept. of EE, Institute of Engineering & Technology, Lucknow, Uttar Pradesh, India
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Internationally the demand of energy is going up day by day, which is causing the gap between demand and the generation to be high. Further Single-phase loads on a three-phase supply system result in an unbalance in the system voltage and supply current leading to Voltage sags/swells in the network. DSTATCOM is a custom power device that is used to regulate the voltage sags/swells in the distribution system for maintaining the rated voltage level at the terminal of load/sensitive loads. The DSTATCOM can inject three-phase voltages at point of common coupling whose magnitude and phase angle can be regulated with PI controller, while the supercapacitors are used to meet the instantaneous power demand since they can store and quickly release significant amounts of energy, while the batteries are used to supply average power demand. This research paper explores combination of batteries and supercapacitors storage system in DSTATCOM for control of load terminal voltage and regulation of SCESS/BESS voltage/energy storage capability, the enhancement in the power quality and reliability.