Modular inverter system redundancy management strategy based on device mixing technology

Abstract

The invention discloses a modular inverter system redundancy management strategy based on a device mixing technology, and the strategy comprises the steps: completing the energy adjustment of each inverter unit through providing an effective fault-tolerant multiple control scheme for the system and a modular inverter system, and enabling the final output power of an inverter to be stable and unchanged; a modular inverter system redundancy management strategy based on a device mixing technology can effectively avoid further reduction of the performance and reliability of a modular inverter system under the corresponding fault condition through adjustment of an inverter system redundancy fault-tolerant control program, so that the modular inverter system can maintain a relatively high performance index, and the reliability of the modular inverter system is improved. And the requirements of higher frequency, higher efficiency, higher power density and lower cost of high-performance power electronic equipment in the field of coast engineering are met.

Description

technical field [0001] The invention relates to the field of power electronics technology and the field of coastal engineering, in particular to a redundancy management strategy for a modularized inverter system based on device hybrid technology. Background technique [0002] With the increasingly complex working environment of special power supplies in coastal engineering, high power density, high efficiency and high reliability have become the development trend of special power supply equipment. To achieve this goal is inseparable from the core power electronic devices of special power supply equipment. In recent years, the rapid development of wide bandgap semiconductor devices represented by silicon carbide (SiC) MOSFETs has brought major technological breakthroughs to the power electronics industry. Due to factors such as technology, low product yield, and long-term operating reliability, it is impossible to effectively shake the dominance of Si IGBT, which also limits...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a redundant fault-tolerant control strategy combined with multiple control modes, so as to reduce the adverse effects of hybrid device failure, and solve the problem of module failure through the redundant fault-tolerant control strategy combined with multiple control modes The technical problems of efficiency, voltage quality and reliability reduction caused by the inverter system in the state of device failure

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