A method of damping transient rush voltage fluctuation of power systems due to a wind driven generator via nonlinear state feedback control
✍ Scribed by Osamu Kanna; Shigeru Hanba; Katsumi Yamashita
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 154 KB
- Volume
- 124
- Category
- Article
- ISSN
- 0424-7760
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✦ Synopsis
Squirrel-cage induction generators are widely used as generators for windmill power systems, because they are inexpensive, have high durability, and are capable of operating asynchronously with power systems. However, induction generators suffer the drawback that they cause transient rush currents that are several times larger than the rated value when connected to power systems. Also since wind energy is influenced by geographic and weather conditions, start/stop operations occur frequently for windmill power systems. Therefore, connecting induction generators to power systems causes undesirable voltage fluctuations in power systems, which is the major obstacle against the practical use of windmill generator systems. This motivates the study of transient rush current/voltage attenuation in windmill generator systems.
In this paper, a nonlinear state-feedback controller for windmill power systems is proposed. The proposed controller globally asymptotically stabilizes the plant and effectively attenuates the transient current/voltage of these systems. Computer simulations using parameters for an actual windmill generator system also gave good results.