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This paper proposes a new modular multilevel converter with symmetric bidirectional DC fault blocking capability for high voltage direct current transmission systems. The new modular multilevel converter is composed of novel submodules, which is developed from a three-level T-type converter combined with some clamp circuits. The proposed novel submodule can output three voltage levels with six IGBTs,...
In this paper, an open-switch fault diagnosis method for five-level H-Bridge Neutral Point Piloted (HB-NPP) or T-type converters is proposed. While fault tolerant operation is based on three steps (fault detection, fault localization and system reconfiguration), a fast fault diagnosis, including both fault detection and localization, is mandatory to make a suitable response to an open-circuit fault...
In grid-connected photovoltaic systems (PV) the inverter is a fundamental component. In fact, a fault in a switch of this power converter could result in an important system malfunction. Thus, fault detection and diagnosis of this fault type is fundamental to overcome this problem. This paper proposes a fault detection diagnosis for the T-type three level inverter. This inverter presents characteristics...
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