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Power devices short circuit or open circuit fault can have serious impact on the reliability of the photovoltaic inverter system during the operational process. On the basis of analysis of the fault characteristics and types with neutral point clamped three-level photovoltaic inverter as the research object, fault diagnosis logic is given. Fault tolerant control strategy for three-level photovoltaic...
Various fault-tolerant inverter structures have been proposed, which are mostly reconfigured by fault-isolating fuses. The inverter design requirements for safe fuse blowing are investigated. Moreover, the effects of differing fuse characteristics and the influence on semiconductors during fuse interruption are evaluated in theory and with a practical setup.
A fault tolerant single phase five level inverter is proposed in this paper for islanded photovoltaic (PV) generation system. The topology has the capability of maintaining same output voltage magnitude in case of switch open circuit fault and/or source open or short circuit fault with slightly reduced number of voltage levels. This helps in supplying uninterruptable power to essential loads even...
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