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Harmonic Analyzing of the Double PWM Converter in DFIG Based on Mathematical Model

Author

Listed:
  • Jing Liu

    (Key Laboratory of Magnetic Suspension Technology and Maglev Vehicle, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China
    School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China)

  • Zhigang Liu

    (Key Laboratory of Magnetic Suspension Technology and Maglev Vehicle, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China
    School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China)

Abstract

Harmonic pollution of double fed induction generators (DFIGs) has become a vital concern for its undesirable effects on power quality issues of wind generation systems and grid-connected system, and the double pulse width modulation (PWM)converter is one of the main harmonic sources in DFIGs. Thus the harmonic analysis of the converter in DFIGs is a necessary step to evaluate their harmonic pollution of DFIGs. This paper proposes a detailed harmonic modeling method to discuss the main harmonic components in a converter. In general the harmonic modeling could be divided into the low-order harmonic part (up to 30th order) and the high-order harmonic part (greater than order 30) parts in general. The low-order harmonics are produced by the circuit topology and control algorithm, and the harmonic component will be different if the control strategy changes. The high-order harmonics are produced by the modulation of the switching function to the dc variable. In this paper, the low-order harmonic modeling is established according to the directions of power flow under the vector control (VC), and the high-order harmonic modeling is established by the switching function of space vector PWM and dc currents. Meanwhile, the simulations of harmonic a components in a converter are accomplished in a real time digital simulation system. The results indicate that the proposed modeling could effectively show the harmonics distribution of the converter in DFIGs.

Suggested Citation

  • Jing Liu & Zhigang Liu, 2017. "Harmonic Analyzing of the Double PWM Converter in DFIG Based on Mathematical Model," Energies, MDPI, vol. 10(12), pages 1-19, December.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:12:p:2087-:d:122190
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    References listed on IDEAS

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    1. Vandai Le & Xinran Li & Yong Li & Tran Le Thang Dong & Caoquyen Le, 2016. "An Innovative Control Strategy to Improve the Fault Ride-Through Capability of DFIGs Based on Wind Energy Conversion Systems," Energies, MDPI, vol. 9(2), pages 1-23, January.
    2. Jun Yao & Qing Li & Zhe Chen & Aolin Liu, 2013. "Coordinated Control of a DFIG-Based Wind-Power Generation System with SGSC under Distorted Grid Voltage Conditions," Energies, MDPI, vol. 6(5), pages 1-21, May.
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    Cited by:

    1. Daliang Yang & Li Yin & Shengguang Xu & Ning Wu, 2018. "Power and Voltage Control for Single-Phase Cascaded H-Bridge Multilevel Converters under Unbalanced Loads," Energies, MDPI, vol. 11(9), pages 1-18, September.
    2. Xunjun Chen & Zhigang Liu, 2019. "Impedance Modeling and Stability Analysis of the Converters in a Double-Fed Induction Generator (DFIG)-Based System," Energies, MDPI, vol. 12(13), pages 1-23, June.
    3. Qingqing He & Lei Liu & Mingyang Qiu & Quanming Luo, 2021. "A Step-by-Step Design for Low-Pass Input Filter of the Single-Stage Converter," Energies, MDPI, vol. 14(23), pages 1-25, November.

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