Power quality is important for the reliable operation of power grids. Unwanted harmonics cause serious degradation of power quality. This problem is more obvious for distributed generations connected to a microgrid. To solve this issue, this paper proposes an improved voltage and current (VI) compensator to collectively suppress voltage and current harmonics in a three‐phase hybrid fuel cell and photovoltaic grid‐connected inverters using a synchronous reference frame (SRF) based technique in the presence of non‐linear loads. It is shown that the proposed compensator can effectively reduce the harmonic contents in voltage and current without any dependence on offset devices such as active and passive filters. Simulations in MATLAB/Simulink show that the proposed control strategy not only reduces the total harmonic distortion to less than 5% (as per the IEEE 519 standard) but also results in the least total harmonic distortion (THD) as compared to existing techniques.

中文翻译：

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使用同步参考框架技术的非线性电压条件下的并网微电网混合电压电流补偿器

电能质量对于电网的可靠运行很重要。有害的谐波会导致电能质量严重下降。对于连接到微电网的分布式发电来说，这个问题更加明显。为了解决这个问题，本文提出了一种改进的电压和电流（VI）补偿器，该技术可以使用基于同步参考框架（SRF）的技术来共同抑制三相混合燃料电池和光伏并网逆变器中的电压和电流谐波。非线性载荷的存在。结果表明，所提出的补偿器可以有效地降低电压和电流中的谐波含量，而无需依赖于诸如有源和无源滤波器之类的补偿器件。