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首页> 外文期刊>Power Electronics, IET >Mechanism and elimination of harmonic current injection from single-phase grid-connected PWM converters
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Mechanism and elimination of harmonic current injection from single-phase grid-connected PWM converters

机译：单相并网PWM变换器注入谐波电流的机理及消除

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摘要

The mechanism of harmonic current injection from single-phase grid-connected converters is comprehensively investigated. The measurable impacts from grid voltage, converter commutation, power factor, PWM modulation and control strategy are demonstrated on the harmonic current injection. According to the mechanism, a tailor-made control solution which employs a low pass voltage-loop filter and internal model principle-based hybrid current controller, is proposed to eliminate the harmonic current injection from the single-phase grid-connected converters. Experiments are performed to verify the validity of the mechanism and the proposed control method. It not only presents an effective tailor-made solution to the elimination of harmonic current injection from grid-connected power converters, but also provides a mechanism-based benchmark tool to further develop rational grid requirements on the harmonic injection levels in the grid integration of distributed generation units.
机译：全面研究了单相并网逆变器注入谐波电流的机理。在谐波电流注入中，证明了来自电网电压，换流器换向，功率因数，PWM调制和控制策略的可测量影响。根据该机理，提出了一种采用低通电压环路滤波器和基于内部模型原理的混合电流控制器的量身定制的控制解决方案，以消除单相并网转换器中注入的谐波电流。通过实验验证了该机构和所提出的控制方法的有效性。它不仅提供了一种有效的量身定制的解决方案，消除了从并网电源转换器注入的谐波电流，而且还提供了一种基于机制的基准工具，可以进一步开发合理的电网要求，以解决分布式电网并网中的谐波注入水平代单位。

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