Common Mode Voltage Compensation for Capacitor Voltage Ripple Reduction of 7-kV SiC-based Modular Multilevel Converter
- The Ohio State Univ., Columbus, OH (United States)
Abstract -Modular multilevel converters (MMCs), with the filterless and transformer-less features, are considered as a promising topology for high-efficiency medium voltage (MV) high voltage (HV) drive systems. However, a large current ripple flowing through the capacitors of each submodule will cause significant capacitor voltage fluctuation. This paper proposes a new compensation method in common mode voltage injection to further reduce the magnitude of the fundamental component in capacitor voltages. The capacitor voltage ripples are reduced significantly by using the proposed control method, which means that smaller size of capacitors can be used for same voltage ripple requirements. Simulation and experimental test results verify the proposed compensation method using a three-phase permanent magnet synchronous machine (PMSM).
- Research Organization:
- The Ohio State Univ., Columbus, OH (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- DOE Contract Number:
- EE0007255
- OSTI ID:
- 1578110
- Resource Relation:
- Conference: Conference: Workshop on Wide Bandgap Power Devices and Applications in Asia (WiPDA Asia) Date: 2018 Location: Xi'an, China
- Country of Publication:
- United States
- Language:
- English
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