Self-tuning resonant control of a 7-leg back-to-back converter for interfacing variable speed generators to 4-wire loads
Cardenas, Roberto and Espina, Enrique and Clare, Jon C. and Wheeler, Patrick (2015) Self-tuning resonant control of a 7-leg back-to-back converter for interfacing variable speed generators to 4-wire loads. IEEE Transactions on Industrial Electronics, 62 (7). pp. 4618-4629. ISSN 1557-9948
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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