Quasi-Z-Source Based WECS for Suppression of Short Term Fluctuations
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2014, Vol 2, Issue 12
Abstract
This paper proposes the design and simulation of Quasi-Z-source based wind energy conversion system for suppressing short term fluctuations. Quasi-Z-source inverter is a new promising power adaptation technology perfectly suitable for interfacing of renewable energy sources such as wind turbines, photo voltaic. The Quasi-Z-source network has the advantage of single stage conversion of Buck-boost function and non zero input current. This leads to reduced stress of the input voltage source. Normally to interface the energy storage systems like supercapacitors and battery banks to wind power systems, converters were used and this will introduce additional cost and power losses. Hence in this proposed method dual inverter topology and super capacitor bank were used to reduce the aforementioned drawbacks. A dual inverter consists of MAIN inverter which is connected to the coupling transformer and an auxiliary inverter, an energy storage system is interfaced with secondary inverter. So the overall system includes wind turbine, PMSG, DC-DC converters, three phase voltage source inverters, energy storage system and related power electronic devices. The Simulation results are presented to authenticate the effectiveness of the proposed system in suppressing short-term wind power fluctuations.
Authors and Affiliations
M. Mohanraj, Dr. Rani Thottungal, N. Anitha
Keywords
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