Gas assisted doubly fed induction generator with ramp rate controller

Sukumar Mishra; Puthan Peedikakkal Zarina; Perumalla Chandra Sekhar

Gas assisted doubly fed induction generator with ramp rate controller

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Author(s): Sukumar Mishra ¹ ; Puthan Peedikakkal Zarina ¹ ; Perumalla Chandra Sekhar ²
- Affiliations: 1: Department of Electrical Engineering, Indian Institute of Technology Delhi, New Delhi 110016, India ;
  2: Department of Electrical Engineering, National Institute of Technology, Warangal, India
Source: Volume 10, Issue 7, August 2016, p. 955 – 963
DOI: 10.1049/iet-rpg.2015.0487 , Print ISSN 1752-1416, Online ISSN 1752-1424

Received 29/10/2015, Accepted 01/02/2016, Revised 16/01/2016, Published 01/08/2016

All the sources are required to supply the scheduled power to the system as directed by the system operator, within a time frame of operation. The fluctuating nature of wind makes supplying the scheduled power a challenging task. To address this, gas turbines are proposed to augment the wind generator to work as buffer owing to their high ramping capability. However, the cost of gas turbine increases with increased ramp rates, whereas, operating efficiency and the life time decreases. Hence, to relieve the buffering gas turbines from higher ramp rate requirements, emulation of inertia of the wind generator is proposed in this paper. The controller is designed to operate in inertia emulation mode whenever there is a retardation of rotor of the wind turbine and the proposed ramp controller will be in action only for first few seconds after the fall in wind speed. While emulating the inertia, the performance of the proposed control philosophy with different ramp rates is investigated in this paper. Guide lines for the selection of the ramp duration and ramp rate for seamless transition from inertia emulation mode to maximum power extraction mode are also suggested in this paper.

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Gas assisted doubly fed induction generator with ramp rate controller

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