Performance analysis of energy storage systems connected to a doubly fed induction generator

Abstract

Wind Energy is a viable source of renewable energy to solve global problems. However, the disadvantage is that wind power is variable, depending critically on wind speed. The simula- tion tool Power System Computer Aided Design/Electromagnetic Transients Direct Current (PSCAD/EMTDC) is used to simulate the model of the Doubly Fed Induction Generator (DFIG) connected to the Energy Storage Systems (ESS). In terms of technical analysis, DFIG which was equipped with the ESS can partly compensate the unstable active power output from the variable wind output power. In addition, this paper analyzed about the performance of Total Harmonic Distortion (THD) for different ESS options such as Super Capacitor ESS (SCESS), Battery ESS (BESS), Two Layer (TL) ESS in the DFIG as 1.5MW ,60Hz under mean wind speed 12 m/s during the 12 second. From the simulation results, The average THD of Hybrid ESS as SC-B ESS, SC- TLESS is the best options to reduce the THD for power quality improvement compared to other ESS options. In terms of economical analysis, the payback time of Battery ESS and Super Capacitor ESS are 3.47 years and 15.76 years respectively. The pay back time of Hybrid ESS is between these two payback time, therefore the system can still be affordable. This paper will provide a better understanding of the performance of different ESS systems, and will be a help for practical applications of ESS in future wind energy projects.