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A Brushless Wound Rotor Induction Generator for Variable Speed Microhydel Plants Without Ballast Load

Joseph, Rex and Umanand, L (2015) A Brushless Wound Rotor Induction Generator for Variable Speed Microhydel Plants Without Ballast Load. In: IEEE TRANSACTIONS ON SUSTAINABLE ENERGY, 6 (1). pp. 20-27.

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Official URL: http://dx.doi.org/ 10.1109/TSTE.2014.2354135


A new generator topology for microhydel power plants, capable of unsupervised operation, is proposed. While conventional microhydel plants operate at constant speed with switched ballast loads, the proposed generator, based on the wound rotor induction machine, operates at variable speed and does away with the need for ballast loads. This increases reliability and substantially decreases system costs and setup times. The proposed generator has a simplified decoupled control structure with stator-referenced voltage control similar to a conventional synchronous generator, and rotor-side frequency control that is facilitated by rotating electronics mounted on the rotor. While this paper describes an isolated plant, the topology can also be tailored for distributed generation enabling conversion of the available hydraulic power into useful electrical power when the grid is present, and supplying local loads in the event of grid outage.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to the IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
Keywords: Ballast-free microhydel; brushless wound rotor induction generator; static commutator; variable speed microhydel
Department/Centre: Division of Electrical Sciences > Electronic Systems Engineering (Formerly Centre for Electronic Design & Technology)
Date Deposited: 28 Jan 2015 04:21
Last Modified: 28 Jan 2015 04:21
URI: http://eprints.iisc.ac.in/id/eprint/50744

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