Small Signal Dynamic Model of a Self-Synchronising Current Regulated Rectifier for a Permanent Magnet Wind Energy Conversion System (WECS)

McGrath, B, Lopez, O and Holmes, G 2018, 'Small Signal Dynamic Model of a Self-Synchronising Current Regulated Rectifier for a Permanent Magnet Wind Energy Conversion System (WECS)', in Proceedings of the 10th Annual IEEE Energy Conversion Congress and Exposition (ECCE 2018), Portland, Oregon, United States, 23-27 September 2018, pp. 5521-5528.


Document type: Conference Paper
Collection: Conference Papers

Title Small Signal Dynamic Model of a Self-Synchronising Current Regulated Rectifier for a Permanent Magnet Wind Energy Conversion System (WECS)
Author(s) McGrath, B
Lopez, O
Holmes, G
Year 2018
Conference name ECCE 2018
Conference location Portland, Oregon, United States
Conference dates 23-27 September 2018
Proceedings title Proceedings of the 10th Annual IEEE Energy Conversion Congress and Exposition (ECCE 2018)
Publisher IEEE
Place of publication United States
Start page 5521
End page 5528
Total pages 8
Abstract Permanent magnet synchronous generators (PMSGs) are attractive for wind energy applications since they can both self-excite and operate at high power densities. Recent work has shown how the rectifiers for these systems can self-synchronise to the stator output voltage using a phase-locked-loop (PLL), and thus control the stator current without requiring rotor position sensors/observers and/or field orientation/direct torque control concepts. This paper now presents a small signal model of this strategy that accounts for the dynamic elements of the current regulator, the PLL, converter modulation delays, and the generator electrical dynamics. The model establishes design principles for this control strategy that confirm its stability when the PLL bandwidth is set to one decade below the current regulator bandwidth. The theoretical findings have been validated using a full-switched model of a PMSG based Wind Energy Conversion System (WECS).
Subjects Renewable Power and Energy Systems Engineering (excl. Solar Cells)
Keyword(s) Wind energy conversion system
active rectifier
small signal linearization
self-synchronising control
proportional resonant (PR) current regulation
DOI - identifier 10.1109/ECCE.2018.8557668
Copyright notice © 2018 IEEE
ISBN 9781479973132
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