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AssigneeNanjing University of Science and Technology
InventorsZhiyong ZENG, Xiaoliang JIN, Chong ZHU, Lei LI
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An adaptive fault-tolerant topology for a three-phase multi-parallel converter based on redundant units is disclosed, wherein a redundant module of each phase is connected to a parallel branch through redundant diodes; during normal operation, the redundant module is maintained in an off state and not connected to the parallel branch, when an open-circuit fault occurs in an IGBT or diode of the parallel bridge arm, the redundant module is automatically connected to the parallel branch through the redundant diodes, replacing faulty components in the parallel bridge arm, allowing the multi-parallel converter to operate normally. This disclosure does not require additional control circuits. It can flexibly configure diodes and redundant units according to various fault types to meet the actual reliability requirements achieving adaptive reconfiguration of hardware resources. Meanwhile, through fault-tolerant control algorithms, this disclosure enables fault-tolerant operation of the topology when a fault occurs.
An adaptive fault-tolerant topology for a three-phase multi-parallel converter based on redundant units, comprising a DC power supply, a three-phase AC power supply or a three-phase load resistor, three-phase filter inductors, and three-phase parallel branches, the parallel branches of each phase comprising n parallel bridge arms and n parallel filter inductors, wherein, each phase further comprises a redundant module including redundant units and redundant diodes, each redundant unit is a combination of IGBTs and diodes, the redundant unit is connected to an AC output side of the corresponding parallel bridge arms through a redundant diode;
Dependencies are inferred from the claim text.