Self-tuning resonant control of a 7-leg back-to-back converter for interfacing variable speed generators to 4-wire loads

Self-tuning resonant control of a 7-leg back-to-back converter for interfacing variable speed generators to 4-wire loads

This paper considers the control of a 7-leg back-to-back Voltage Source Inverter (VSI) arrangement feeding a 4-wire load from a 3-phase Permanent Magnet Synchronous Generator (PMSG) operating at variable speed. The PMSG is controlled using a sensorless Model Reference Adaptive System (MRAS) to obtai...

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Bibliographic Details
Main Authors: Cardenas, Roberto, Espina, Enrique, Clare, Jon C., Wheeler, Patrick
Format: Article
Published: Institute of Electrical and Electronics Engineers 2015
Subjects:
AC-AC Power Convertion
Power generation control
Converters
Variable speed generation
Online Access:https://eprints.nottingham.ac.uk/32172/
Description
Summary:This paper considers the control of a 7-leg back-to-back Voltage Source Inverter (VSI) arrangement feeding a 4-wire load from a 3-phase Permanent Magnet Synchronous Generator (PMSG) operating at variable speed. The PMSG is controlled using a sensorless Model Reference Adaptive System (MRAS) to obtain the rotor position angle. The 7-leg converter is regulated using Resonant Controllers (RCs) at the load side and self-tuning resonant controllers at the generator side. The control system is augmented by a feed-forward compensation algorithm which improves the dynamic performance during transients. Experimental results, obtained from a prototype, are presented and discussed.

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