Current harmonics generated by adjustable-speed drives (ASDs) are one of the main power quality concerns in commercial and industrial distribution networks due to a high number of ASDs. These harmonics affect the grid power quality, instability, resonances, and power losses. Therefore, different harmonic mitigation strategies using active front end have been proposed to tackle this issue. However, due to the cost-effectiveness, conventional front end such as diode rectifier is still recommended in industries for a broad range of three-phase power electronics systems. Thus, in this study, a new DC modulation method is proposed using three-phase diode rectifier with controlled DC-link current (boost converter) for grid harmonic elimination approach. Simulations and experiments have been carried out to validate the proposed concept that a selective harmonic can be eliminated from the grid using the developed strategy.

中文翻译：

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使用在商业或工业配电网络中使用的有源三相变频器的谐波缓解技术

可调速驱动器（ASD）产生的电流谐波是商业和工业配电网络中主要的电能质量问题之一，原因是ASD数量很多。这些谐波会影响电网的电能质量，不稳定性，谐振和功率损耗。因此，已经提出了使用有源前端的不同谐波缓解策略来解决该问题。但是，由于成本效益，在工业领域中仍然建议将常规前端（例如二极管整流器）用于广泛的三相电力电子系统。因此，在这项研究中，提出了一种新的直流调制方法，该方法使用具有受控直流母线电流（升压转换器）的三相二极管整流器来消除电网谐波。