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A design methodology of multi-resonant controllers for high performance 400Hz ground power units

Rojas, Felix; Cardenas-Dobson, Roberto; Clare, Jon C.; Diaz, Matias; Pereda, Javier; Kennel, Ralph


Felix Rojas

Roberto Cardenas-Dobson

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Professor of Power Electronics

Matias Diaz

Javier Pereda

Ralph Kennel


In aerospace applications, a Ground Power Unit (GPU) has to provide balanced and sinusoidal 400 Hz phase-to-neutral voltages to unbalanced and non-linear single-phase loads. Compensation of high-order harmonics is complex, as the ratio between sampling frequency and compensated harmonics can be very small. Thus multiple superimposed resonant controllers or PI nested controllers in multiple dq frames are not good alternatives. The first approach cannot ensure stability, while the second cannot track sinusoidal zero-sequence components, typically present in unbalanced system, and unachievable high bandwidth at the inner current control loop is typically required. In this paper, a simple methodology for designing a single-loop, multiple resonant controller for simultaneous mitigation of several high-order harmonics, ensuring stability, is presented. Experimental results, based on a 6kW four-leg NPC converter, validates the proposed controller design, showing excellent steady state and transient performance.


Rojas, F., Cardenas-Dobson, R., Clare, J. C., Diaz, M., Pereda, J., & Kennel, R. (2019). A design methodology of multi-resonant controllers for high performance 400Hz ground power units. IEEE Transactions on Industrial Electronics, 66(8), 654 -6559.

Journal Article Type Article
Acceptance Date Jan 1, 2019
Online Publication Date Feb 15, 2019
Publication Date Aug 1, 2019
Deposit Date Mar 20, 2019
Publicly Available Date Mar 20, 2019
Journal IEEE Transactions on Industrial Electronics
Print ISSN 0278-0046
Electronic ISSN 1557-9948
Publisher Institute of Electrical and Electronics Engineers
Peer Reviewed Peer Reviewed
Volume 66
Issue 8
Pages 654 -6559
Public URL
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