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首页> 外文期刊>Arabian Journal for Science and Engineering >A Three-phase Nine-level Fault Tolerant Asymmetrical Inverter
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A Three-phase Nine-level Fault Tolerant Asymmetrical Inverter

机译：三相九电平容错不对称逆变器

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摘要

The reliability in inverters has gained a vast importance for their enhanced economic operation of the system. This paper proposes a three-phase reliable nine-level inverter with fault ride through capability. The proposed inverter synthesizes nine levels in the output with two asymmetrical voltage sources configured at a ratio of 1:3 under healthy operation. The inverter is analyzed for open circuit faults in switches. A reliability analysis is carried out for proposed inverter and compared with classical Cascaded-H Bridge. Combined control logic is implemented to control the inverter in accordance with the operating conditions. The circuit is operated with sinusoidal pulse width modulation under healthy condition, and it is made to operate with switching frequency optimal-based pulse width modulation (SFO-PWM) under fault cases, as it enhances fundamental DC value. The proposed inverter is simulated in MATLAB/SIMULINK, and the results are validated by an experimental setup.
机译：逆变器的可靠性因其系统经济性的提高而变得极为重要。本文提出了一种具有故障穿越能力的三相可靠的九电平逆变器。所建议的逆变器在正常运行时，使用两个以1：3的比率配置的非对称电压源在输出中合成九个电平。分析逆变器中开关的开路故障。对提出的逆变器进行了可靠性分析，并与经典的层叠H桥进行了比较。实施组合控制逻辑以根据工作条件控制逆变器。该电路在健康状态下以正弦脉冲宽度调制方式工作，在故障情况下，由于它提高了基本DC值，因此可以在基于开关频率最优的脉冲宽度调制（SFO-PWM）下工作。所提出的逆变器在MATLAB / SIMULINK中进行了仿真，并通过实验设置验证了结果。

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