Fluid power network for centralized electricity generation in offshore wind farms

Fluid power network for centralized electricity generation in offshore wind farms

Jarquin-Laguna, A.

Civil Engineering and Geosciences

Hydraulic Engineering

2014-03-31

An innovative and completely different wind-energy conversion system is studied where a centralized electricity generation within a wind farm is proposed by means of a hydraulic network. This paper presents the dynamic interaction of two turbines when they are coupled to the same hydraulic network. Due to the stochastic nature of the wind and wake interaction effects between turbines, the operating parameters (i.e. pitch angle, rotor speed) of each turbine are different. Time domain simulations, including the main turbine dynamics and laminar transient flow in pipelines, are used to evaluate the efficiency and rotor speed stability of the hydraulic system. It is shown that a passive control of the rotor speed, as proposed in previous work for a single hydraulic turbine, has strong limitations in terms of performance for more than one turbine coupled to the same hydraulic network. It is concluded that in order to connect several turbines, a passive control strategy of the rotor speed is not sufficient and a hydraulic network with constant pressure is suggested. However, a constant pressure network requires the addition of active control at the hydraulic motors and spear valves, increasing the complexity of the initial concept. Further work needs to be done to incorporate an active control strategy and evaluate the feasibility of the constant pressure hydraulic network.

http://resolver.tudelft.nl/uuid:000045fb-4762-4985-a423-688824607d8c

https://doi.org/10.1088/1742-6596/524/1/012075

IOP Publishing

1742-6596

Journal of Physics: conference series 1, 524, 2014

Institutional Repository

journal article

(c)2014 Jarquin-Laguna, A.
Published under licence by IOP Publishing Ltd