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Dynamic Power–Frequency Control in a Hybrid Wind-PV Plant Interlinked with AC Power System

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Abstract

Hybrid renewable energy-based generation can improve the reliability in power supply. While avoiding the big cost in energy storage/battery, it is apparent that, such hybrid plants could be interlinked with the conventional power system for ensuring continuous power supply in the local area and better utilization of renewable energy sources. As generation from the renewable energy sources are intermittent, the interaction of such hybrid plants with the traditional power network can abruptly disturb the power/frequency level. Thus, devising a robust power–frequency control (PFC) scheme for the contemporary hybrid renewable interlinked power systems is highly obligatory. In this context, this paper presents a fractional-order-proportional-integral-derivative (FOPID) controller based advanced PFC scheme. Bacterial-foraging optimization (BFO) technique is adopted for computing the design parameters, namely, the controller gains and set-point weights. A typical hybrid wind- photovoltaic (PV) Plant interlinked thermal power system is modelled and simulated in order to investigate the system dynamics. Effectiveness of the proposed PFC scheme corroborated with the renewable power variations as well as load perturbation is confirmed and the results are presented.

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Appendix

Appendix

The nominal system parameters:

f = 60 Hz, H1 = H3 = 5 s, D1 = D2 = 0.00833 pu MW/Hz, Kp1 = Kp2 = 120 Hz/pu MW, Tp1 = Tp2 = 20 s, B1 = B2 = 0.425 pu MW/Hz, R1 = R2 = 2.4 Hz/pu MW, T12 = 0.545 pu MW, Kw = 0.8, Tw = 5 s, Kw1 = 1.28, Tw1 = 1 s, Kw2 = 12.5, Tw2 = 0.03 s, Kw3 = 1.5, Tw3 = 1.2 s, Kbc = 0.08, T = 1 s, M1 = 0.3, M2 = 1, Ti = 1.5 s, R = 10 Ω, L = 210 mH, C = 0.476 μF, Tg = 0.08 s, Tt = 0.3 s, Kr = 0.5, Tr = 10 s, GPFw = 0.8, GPFPV = 0.2.

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Datta, A., Koley, I., Panda, G.K. et al. Dynamic Power–Frequency Control in a Hybrid Wind-PV Plant Interlinked with AC Power System. J. Electr. Eng. Technol. 16, 1469–1479 (2021). https://doi.org/10.1007/s42835-021-00691-y

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