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An Optimal Integrated Control Scheme for Permanent Magnet Synchronous Generator-Based Wind Turbines under Asymmetrical Grid Fault Conditions

Author

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  • Dan Wang

    (State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Changping District, Beijing 102206, China)

  • Chongru Liu

    (State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Changping District, Beijing 102206, China)

  • Gengyin Li

    (State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Changping District, Beijing 102206, China)

Abstract

In recent years, the increasing penetration level of wind energy into power systems has brought new issues and challenges. One of the main concerns is the issue of dynamic response capability during outer disturbance conditions, especially the fault-tolerance capability during asymmetrical faults. In order to improve the fault-tolerance and dynamic response capability under asymmetrical grid fault conditions, an optimal integrated control scheme for the grid-side voltage-source converter (VSC) of direct-driven permanent magnet synchronous generator (PMSG)-based wind turbine systems is proposed in this paper. The optimal control strategy includes a main controller and an additional controller. In the main controller, a double-loop controller based on differential flatness-based theory is designed for grid-side VSC. Two parts are involved in the design process of the flatness-based controller: the reference trajectories generation of flatness output and the implementation of the controller. In the additional control aspect, an auxiliary second harmonic compensation control loop based on an improved calculation method for grid-side instantaneous transmission power is designed by the quasi proportional resonant (Quasi-PR) control principle, which is able to simultaneously restrain the second harmonic components in active power and reactive power injected into the grid without the respective calculation for current control references. Moreover, to reduce the DC-link overvoltage during grid faults, the mathematical model of DC-link voltage is analyzed and a feedforward modified control factor is added to the traditional DC voltage control loop in grid-side VSC. The effectiveness of the optimal control scheme is verified in PSCAD/EMTDC simulation software.

Suggested Citation

  • Dan Wang & Chongru Liu & Gengyin Li, 2016. "An Optimal Integrated Control Scheme for Permanent Magnet Synchronous Generator-Based Wind Turbines under Asymmetrical Grid Fault Conditions," Energies, MDPI, vol. 9(4), pages 1-27, April.
    • Handle: RePEc:gam:jeners:v:9:y:2016:i:4:p:307-:d:68738
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    References listed on IDEAS

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    1. Yun-Su Kim & Il-Yop Chung & Seung-Il Moon, 2015. "Tuning of the PI Controller Parameters of a PMSG Wind Turbine to Improve Control Performance under Various Wind Speeds," Energies, MDPI, vol. 8(2), pages 1-20, February.
    2. Shin Young Heo & Mun Kyeom Kim & Jin Woo Choi, 2015. "Hybrid Intelligent Control Method to Improve the Frequency Support Capability of Wind Energy Conversion Systems," Energies, MDPI, vol. 8(10), pages 1-22, October.
    3. 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.
    4. Abdul Motin Howlader & Naomitsu Urasaki & Atsushi Yona & Tomonobu Senjyu & Ahmed Yousuf Saber, 2013. "Design and Implement a Digital H∞ Robust Controller for a MW-Class PMSG-Based Grid-Interactive Wind Energy Conversion System," Energies, MDPI, vol. 6(4), pages 1-26, April.
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    Cited by:

    1. Liuming Jing & Dae-Hee Son & Sang-Hee Kang & Soon-Ryul Nam, 2017. "Unsynchronized Phasor-Based Protection Method for Single Line-to-Ground Faults in an Ungrounded Offshore Wind Farm with Fully-Rated Converters-Based Wind Turbines," Energies, MDPI, vol. 10(4), pages 1-15, April.
    2. Peifeng Xu & Kai Shi & Yuxin Sun & Huangqiu Zhu, 2016. "Analytical Model of a Dual Rotor Radial Flux Wind Generator Using Ferrite Magnets," Energies, MDPI, vol. 9(9), pages 1-18, August.
    3. Shoudao Huang & Yang Zhang & Sijia Hu, 2016. "Stator Current Harmonic Reduction in a Novel Half Quasi-Z-Source Wind Power Generation System," Energies, MDPI, vol. 9(10), pages 1-15, September.
    4. Jin Liu & Wenxiang Zhao & Jinghua Ji & Guohai Liu & Tao Tao, 2016. "A Novel Flux Focusing Magnetically Geared Machine with Reduced Eddy Current Loss," Energies, MDPI, vol. 9(11), pages 1-15, November.
    5. Chenyu Gu & Wenxiang Zhao & Bufeng Zhang, 2016. "Simplified Minimum Copper Loss Remedial Control of a Five-Phase Fault-Tolerant Permanent-Magnet Vernier Machine under Short-Circuit Fault," Energies, MDPI, vol. 9(11), pages 1-15, October.

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