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Improvement of grid frequency dynamic characteristic with novel wind turbine based on electromagnetic coupler

Author

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  • You, Rui
  • Barahona, Braulio
  • Chai, Jianyun
  • Cutululis, Nicolaos A.
  • Wu, Xinzhen

Abstract

A synchronous generator is directly coupled to grid in the novel wind turbine drive train concept based on electromagnetic coupler (WT-EMC). Similarly to conventional power plants, WT-EMC has inherent (inertial) grid frequency support capability, albeit rather limited due to its configuration. Additional power should be generated in response to a grid frequency drop in order to improve the dynamic characteristic of the grid frequency. In this paper, a novel control strategy for WT-EMC to improve the dynamic characteristic of grid frequency is proposed. The principle is to detect active power imbalance in the grid and then rapidly regulate the output power of WT-EMC. Based on the calculated electromagnetic torque of the synchronous generator in WT-EMC—acquired faster than the calculated grid frequency—the synchronous generator mechanical torque is controlled to track its electromagnetic torque to stabilize the rotor speed, therefore directly improving the grid frequency. The proposed control strategy effectiveness is firstly tested through simulations and then validated on a specially built experimental platform.

Suggested Citation

  • You, Rui & Barahona, Braulio & Chai, Jianyun & Cutululis, Nicolaos A. & Wu, Xinzhen, 2017. "Improvement of grid frequency dynamic characteristic with novel wind turbine based on electromagnetic coupler," Renewable Energy, Elsevier, vol. 113(C), pages 813-821.
    • Handle: RePEc:eee:renene:v:113:y:2017:i:c:p:813-821
    DOI: 10.1016/j.renene.2017.06.038
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    References listed on IDEAS

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    1. Rui You & Braulio Barahona & Jianyun Chai & Nicolaos A. Cutululis, 2013. "A Novel Wind Turbine Concept Based on an Electromagnetic Coupler and the Study of Its Fault Ride-through Capability," Energies, MDPI, vol. 6(11), pages 1-17, November.
    2. You, Rui & Barahona, Braulio & Chai, Jianyun & Cutululis, Nicolaos A., 2015. "Frequency support capability of variable speed wind turbine based on electromagnetic coupler," Renewable Energy, Elsevier, vol. 74(C), pages 681-688.
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    Cited by:

    1. Fernández-Guillamón, Ana & Gómez-Lázaro, Emilio & Muljadi, Eduard & Molina-García, Ángel, 2019. "Power systems with high renewable energy sources: A review of inertia and frequency control strategies over time," Renewable and Sustainable Energy Reviews, Elsevier, vol. 115(C).
    2. Yingming Liu & Yingwei Wang & Xiaodong Wang & Jiangsheng Zhu & Wai Hou Lio, 2019. "Active Power Dispatch for Supporting Grid Frequency Regulation in Wind Farms Considering Fatigue Load," Energies, MDPI, vol. 12(8), pages 1-23, April.

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