Output Power Leveling of Wind Turbine Generator by EDLC Energy Storage System

This paper deals with the modelling and control for wind turbine combined with a battery energy storage system (WT/BESS). A proportional-integral (PI) controller of pitch angle is applied to adjust the output power of WT, and a method for battery scheduling is presented for maintaining the state of charging (SOC) of BESS. When the battery level is below the lower limit, we increase the expected output power of wind turbine through raising the operation point to charge the battery. Considering the effect of charging/discharging, a switched linear system model with two equilibriums is presented firstly for such WT/BESS system. The region stability is analyzed and an approach for estimating the corresponding stable region is also given. The effectiveness of the proposed results is demonstrated by a numerical example.

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Frequency control of a wind turbine generator–flywheel system

Wind Engineering ◽

10.1177/0309524x17721996 ◽

2017 ◽

Vol 41 (6) ◽

pp. 397-408 ◽

Cited By ~ 1

Author(s):

Djalloul Achour ◽

Mohamed Kesraoui ◽

Ahmed Chaib ◽

Abdeldjalil Achour

Keyword(s):

Wind Turbine ◽

Power Flow ◽

Frequency Control ◽

Storage System ◽

Energy System ◽

Energy Storage System ◽

Turbine Generator ◽

Integral Control ◽

Wind Turbine Generator ◽

Hybrid Renewable Energy System

The aim of this article is to propose an enhanced frequency regulator of a wind turbine generator associated with a flywheel applying an adaptive fuzzy proportional integral control, to supply a stand-alone load at 50 Hz. The flywheel energy storage system is used to balance the produced and consumed powers; it means the flywheel stores energy in case of power excess and delivers it in the opposite case. This power flow control stabilizes more the frequency around the set point. This hybrid renewable energy system is simulated by SIMPOWER in MATLAB Simulink software. Furthermore, performance improvement of the proposed new control is validated by the obtained satisfying results.

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Dynamics of a Flywheel Energy Storage System Supporting a Wind Turbine Generator in a Microgrid

International Journal of Emerging Electric Power Systems ◽

10.1515/ijeeps-2015-0128 ◽

2016 ◽

Vol 17 (1) ◽

pp. 15-26 ◽

Cited By ~ 7

Author(s):

Gayathri Nair S ◽

Nilanjan Senroy

Keyword(s):

Energy Storage ◽

Storage System ◽

Energy Storage System ◽

Reduced Order Model ◽

Flywheel Energy Storage ◽

Order Model ◽

Turbine Generator ◽

Reduced Order ◽

Flywheel Energy Storage System ◽

Wind Turbine Generator

Abstract Integration of an induction machine based flywheel energy storage system with a wind energy conversion system is implemented in this paper. The nonlinear and linearized models of the flywheel are studied, compared and a reduced order model of the same simulated to analyze the influence of the flywheel inertia and control in system response during a wind power change. A quantification of the relation between the inertia of the flywheel and the controller gain is obtained which allows the system to be considered as a reduced order model that is more controllable in nature. A microgrid setup comprising of the flywheel energy storage system, a two mass model of a DFIG based wind turbine generator and a reduced order model of a diesel generator is utilized to analyse the microgrid dynamics accurately in the event of frequency variations arising due to wind power change. The response of the microgrid with and without the flywheel is studied.

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