Stator Current Harmonic Reduction in a Novel Half Quasi-Z-Source Wind Power Generation System

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

Energies, 2016, vol. 9, issue 10, 1-15

Abstract: The generator stator current gets distorted with unacceptable levels of total harmonic distortion (THD) because impedance-source wind power generation systems use three-phase diode rectifiers. The stator current harmonics will cause increasing losses and torque ripple, which reduce the efficiency and stability of the system. This paper proposes a novel half quasi-Z-source inverter (H-qZSI) for grid-connected wind power generation systems, which can reduce the generator stator current harmonics a great deal. When H-qZSI operates in the shoot-through zero state, the derivative of the generator stator current is only determined by the instantaneous value of the generator stator voltage, so the nonlinear relationship between generator stator current and stator voltage is improved compared with the traditional impedance-source inverter. Theoretically, it is indicated that the stator current harmonics can be reduced effectively by means of the proposed H-qZSI. Finally, simulation and experimental results are given to verify the theoretical analysis.

Keywords: wind power generation; half quasi-Z-source inverter (H-qZSI); three-phase diode rectifier; shoot-through zero state; harmonic reduction (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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