Staircase Control of Hybrid Cascaded Multi-level Inverter

Sang, Zixia; Mao, Chengxiong; Wang, Dan

doi:10.1080/15325008.2013.843219

Cited by 14 publications

(2 citation statements)

References 19 publications

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“…Research on these inverters has been focused on the analysis of topologies , the proposal of modulation schemes and modifications to the basic CMI topology . In , a modulation scheme is proposed to deal with different capacitor voltages in the DC‐link to obtain increased output voltage level number. In particular, there have been modulation schemes and modifications to the basic topology aimed to reduce the LGC.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, the harmonic content of the AC voltage is low, which translates into output filters of smaller size with guaranteed low harmonic distortion. All these benefits make the CMI very attractive for transformerless PV applications.Research on these inverters has been focused on the analysis of topologies [10], the proposal of modulation schemes [6,23] and modifications to the basic CMI topology [24]. In [23], a modulation scheme is proposed to deal with different capacitor voltages in the DC-link to obtain increased output voltage level number.…”

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confidence: 99%

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A PWM method for single-phase cascade multilevel inverters to reduce leakage ground current in transformerless PV systems

Vázquez

Martinez‐Rodriguez

Escobar

et al. 2016

Int. Trans. Electr. Energ. Syst.

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SUMMARYA single-phase cascade multilevel inverter is able to synthesize AC output voltages with considerably reduced harmonic distortion, which results in reduced size output filters. In addition, the amplitude of the output voltage in the cascade multilevel inverter topology is usually higher than in a single H-Bridge inverter, which makes possible the power injection into the grid without a voltage boost stage. These benefits make cascade multilevel inverter a suitable topology for PV applications. However, cascade multilevel inverters may exhibit large leakage ground current in a grid-connected PV transformerless system, which is caused by a variable voltage across the stray capacitances formed between the PV panel and ground. In this paper, a modulation strategy for the cascade multilevel inverter is proposed to deal with leakage ground currents arising in transformerless PV applications. Numerical and experimental results are performed to assess the effectiveness of the proposed modulation strategy in the reduction of leakage ground currents and improving the topology efficiency.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%