1. A New Space-Vector-Modulation Algorithm for a Three-Level Four-Leg NPC Inverter.
- Author
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Rojas, Felix, Kennel, Ralph, Cardenas, Roberto, Repenning, Ricardo, Clare, Jon C., and Diaz, Matias
- Subjects
- *
ELECTRIC inverters , *VECTOR spaces , *IDEAL sources (Electric circuits) - Abstract
For power conversion systems interfaced to four-wire supplies, four-leg converters have become a standard solution. A four-leg converter allows good compensation of zero-sequence harmonics and full utilisation of the dc-link voltage. These are very important features when unbalanced and/or nonlinear loads are connected to the system. This paper proposes a three-dimensional space vector modulation (SVM) algorithm and provides a comprehensive analysis of the algorithm implemented on a three-level, four-leg neutral-point-clamped converter. The algorithm allows a simple definition of the different switching patterns and enables balancing of the dc-link capacitor voltages using the redundancies of the converter states. A resonant controller is selected as the control strategy to validate the proposed SVM algorithm in a 6 kW experimental rig. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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