Under weak grid conditions and in microgrids, the gird impedance is often large has a highly varying nature. In such scenario, stabilizing grid-connected inverters with an LCL output filter could be challenging task. The control delay that comes from sampling PWM may contribute to worsen this condition. particular, mentioned causes critical frequency at one-sixth of (f <sub xmlns:mml="http://ww...

Abstract Multiple inverters are connected to the distribution network with complex non‐linear loads and may interact background harmonics in some cases. In addition parallel resonance caused by harmonic current, voltage also causes series resonance. The matching of frequencies current results serious distortion grid‐connected bus waveform, or even threatens stability its operating point. A gene...

Single-source binary hybrid multilevel inverters with cascaded transformers have a bulky transformer connected to their main H-bridge cells in each phase. This bulky transformer has been eliminated in this work without any effect on operation and modulation strategies. The proposed topology has significant advantages from view point of dimensions and number of transformers, design of transforme...