A Two Loop Optimal Control of Flexible Drive Train Variable Speed Wind Power Systems
| Authors: | Munteanu Iulian, University of Galati, Romania
Bratcu Antoneta Iuliana, University of Galati, Romania
Cutululis Nicolaos Antonio, University of Galati, Romania
Ceanca Emil, University of Galati, Romania |
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| Topic: | 6.3 Power Plants and Power Systems |
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| Session: | Solar and Wind Energy |
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| Keywords: | power generation, windmills, linearization, optimal control, linear quadratic regulators, performance indices |
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Abstract
This paper presents a two loop optimal control structure for variable speed fixed pitch horizontal axis wind turbines (HAWT) having flexible drive trains. That structure, formed by a low frequency loop and a high frequency loop, is the result of the frequency separation principle adopted in the wind modelling. The optimality of the whole system is expressed by the trade-off between the energy conversion maximization and the minimization of the total load excitation that induces the drive train’s mechanical stress. This optimal problem is treated within a complete linear quadratic stochastic approach, whose effectiveness was proved by numerical simulation.
