Fault-tolerant control for a modular generator and converter scheme for direct-drive wind turbines : Industrial Electronics, IEEE Transactions on

Parker, M.A. and Ng, Chong and Ran, Li (2011) Fault-tolerant control for a modular generator and converter scheme for direct-drive wind turbines : Industrial Electronics, IEEE Transactions on. IEEE Transactions on Industrial Electronics, 58 (1). pp. 305-315. ISSN 0278-0046 (https://doi.org/10.1109/TIE.2010.2045318)

[thumbnail of Fault Tolerant Control for a Modular Generator-Converter Scheme for Direct Drive Wind Turbines]
Preview
PDF. Filename: fault_tolerance.pdf
Accepted Author Manuscript
License: Creative Commons Attribution-NonCommercial-ShareAlike 4.0 logo

Download (2MB)| Preview

Abstract

A modular power electronic converter, with a cascaded H-bridge multilevel inverter, has been proposed as the grid interface for a large direct drive wind turbine generator. The present study is to investigate the potential and requirement of fault tolerant operation in such a system. As each module is connected to isolated generator coils, tolerance to a module or coil fault is possible if the affected module can be bypassed while the control of the healthy modules can be adjusted accordingly. A boost rectifier scheme on the machine side of the power conversion stage has been developed for this purpose, featuring control of the coil current without measuring the EMF. A coordinated DC-link voltage controller has been developed which can rapidly raise the DC-link voltage of the remaining modules to compensate for the loss of a module, while ignoring the ripple in the DC-link due to low-frequency inverter switching. The ability of the resultant system to tolerate module faults has been demonstrated on a small scale laboratory prototype.

ORCID iDs

Parker, M.A. ORCID logoORCID: https://orcid.org/0000-0001-8268-4829, Ng, Chong and Ran, Li;