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Active Power Dispatch for Supporting Grid Frequency Regulation in Wind Farms Considering Fatigue Load

1
Institute of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China
2
Energy Department of Technology, Aalborg University, 6700 Esbjerg, Denmark
3
Department of Wind Energy, Technical University of Denmark, 4000 Roskilde, Denmark
*
Author to whom correspondence should be addressed.
Energies 2019, 12(8), 1508; https://doi.org/10.3390/en12081508
Received: 28 February 2019 / Revised: 9 April 2019 / Accepted: 17 April 2019 / Published: 21 April 2019
(This article belongs to the Special Issue Control Schemes for Wind Electricity Systems)
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Abstract

This paper proposes an active power control method for supporting grid frequency regulation in wind farms (WF) considering improved fatigue load sensitivity of wind turbines (WT). The control method is concluded into two parts: frequency adjustment control (FAC) and power reference dispatch (PRD). On one hand, the proposed Fuzzy-PID control method can actively maintain the balance between power generation and grid load, by which the grid frequency is regulated when plenty of winds are available. The fast power response can be provided and frequency error can be reduced by the proposed method. On the other hand, the sensitivity of the WT fatigue loads to the power references is improved. The explicit analytical equations of the fatigue load sensitivity are re-derived to improve calculation accuracy. In the process of the optimization dispatch, the re-defined fatigue load sensitivity will be used to minimize fatigue load. Case studies were conducted with a WF under different grid loads and turbulent wind with different intensities. By comparing the frequency response of the WF, rainflow cycle, and Damage Equivalent Load (DEL) of the WT, the efficacy of the proposed method is verified. View Full-Text
Keywords: fatigue load; active power dispatch; frequency regulation; fuzzy control; wind farm fatigue load; active power dispatch; frequency regulation; fuzzy control; wind farm
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Liu, Y.; Wang, Y.; Wang, X.; Zhu, J.; Lio, W.H. Active Power Dispatch for Supporting Grid Frequency Regulation in Wind Farms Considering Fatigue Load. Energies 2019, 12, 1508.

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