Capacitor Voltage Ripple Suppression for Z-Source Wind Energy Conversion System

Shoudao Huang, Yang Zhang and Zhikang Shuai
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Shoudao Huang: College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
Yang Zhang: College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
Zhikang Shuai: College of Electrical and Information Engineering, Hunan University, Changsha 410082, China

Energies, 2016, vol. 9, issue 1, 1-15

Abstract: This paper proposes an improved pulse-width modulation (PWM) strategy to reduce the capacitor voltage ripple in Z-source wind energy conversion system. In order to make sure that Z-source capacitor voltage has symmetrical maximum and minimum amplitudes in each active state, the shoot-through time is divided into six unequal parts. According to the active state and zero state, the shoot-through time is rearranged to match the charging time and discharging time of the Z-source capacitors. Theoretically, it is indicated that the voltage ripple of the Z-source capacitors can be reduced effectively by means of the proposed PWM scheme. Finally, simulation and experimental results are given to verify the performance of the presented method.

Keywords: wind generation system; Z-source inverter; pulse width modulation; capacitor voltage ripple (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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