A New Simulation and Control Model for a Variable Speed Variable Pitch Direct Drive Large Offshore Wind Turbine Generator With Integrated Energy Storage

Kazemtabrizi, B.; Hogg, S.

Abstract

A comprehensive control and simulation model has been presented in this paper for a large multi-megawatt Variable Speed Variable Pitch Wind Turbine Generator (WTG) with Energy Storage System (ESS) integration. The generator is of a Permanent Magnet Synchronous Generator (PMSG) type which is then decoupled from the grid using a Fully-Rated back-to-back Converter (FRC) link. A Rotor Flux Oriented Control (RFOC) strategy has been adopted in order to extract the maximum output electromagnetic torque from the generator according to a Maximum Power Point Tracking (MPPT) profile for any wind speed lower than rated wind speed. The MPPT method presented in this paper relies on the turbine’s optimal output torque curve. The ESS makes provisions for enhanced performance especially during faults on the system. Dynamic performance of a super-capacitor makes it ideal as the integrated ESS in the WTG for satisfying such performance constraints. Results indicate that the WTG integrated with a super-capacitor ESS provides the required enhanced performance in terms of DC link voltage stability and limiting output power fluctuations during sudden variations in the wind speed as well as enhanced Fault Ride-Through (FRT) capability.

Citation

Kazemtabrizi, B., & Hogg, S. (2014). A New Simulation and Control Model for a Variable Speed Variable Pitch Direct Drive Large Offshore Wind Turbine Generator With Integrated Energy Storage. In Proceedings of ASME Turbo Expo 2014 : Turbine Technical Conference and Exposition, June 16-20, 2014, Düsseldorf, Germany. https://doi.org/10.1115/gt2014-25682

• Conference Name: ASME Turbo Expo 2014
• Conference Location: Dusseldorf, Germany
• Start Date: Jun 16, 2014
• End Date: Jun 20, 2014
• Publication Date: Jun 20, 2014
• Deposit Date: Sep 29, 2014
• Publisher: American Society of Mechanical Engineers
• Volume: 3B
• Book Title: Proceedings of ASME Turbo Expo 2014 : Turbine Technical Conference and Exposition, June 16-20, 2014, Düsseldorf, Germany.
• DOI: https://doi.org/10.1115/gt2014-25682
• Additional Information: Paper No. GT2014-25682 Conference date: 16-20 June 2014