Primary Frequency Response Enhancement for Future Low Inertia Power Systems Using Hybrid Control Technique

Abdulhameed S. Alsharafi, Ahmad H. Besheer and Hassan M. Emara
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Abdulhameed S. Alsharafi: Electrical Power and Machines Department, Cairo University, Giza 12613, Egypt
Ahmad H. Besheer: Environmental Studies and Research Institute, University of Sadat City, Sadat City 32897, Egypt
Hassan M. Emara: Electrical Power and Machines Department, Cairo University, Giza 12613, Egypt

Energies, 2018, vol. 11, issue 4, 1-20

Abstract: Maintaining the stability of a conventional power system during under frequency events is partially dominated by a natural behavior called inertial response. Although a variable speed wind turbine (VSWT) is fundamentally deprived from such behavior, it was shown recently that it can virtually emulate this response, hence increasing its output power given to the grid to sustain the power balance. This paper reviews and analyzes the performance of four primary frequency control structures, and provides comparison between these controllers in terms of security indices. The results reflect the superiority of the inertia emulation controller and the droop control type in low and high wind speed respectively. To enhance the system frequency control response and take any inherent advantage of each controller, this paper proposes two novel controllers based on combination (hybridization) strategy between the four controllers. The results show that the combination between the inertia emulation controller and the de-loading controller will lead to reducing the rate of change of frequency (ROCOF) and raising the frequency nadir (FN) values. Finally, the role of each discussed controller in determining the correlations among ROCOF, FN and wind power penetration level are explored.

Keywords: primary frequency control; wind turbine; inertia control; frequency nadir (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: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (12)

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