A Novel Modulation Method to Reduce Leakage Current in Transformerless Z-source PV Inverters

Abadifard, Armin; Ghavidel, Pedram; Taherkhani, Nima; Sabahi, Mehran

doi:10.1109/dcas51144.2020.9330676

Cited by 5 publications

(1 citation statement)

References 20 publications

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“…When designing the controller, it is necessary to design each harmonic controller, which increases the design difficulty of the controller and the computational burden of the processor. The study in [ 19 ] proposed an equivalent impedance reshaping strategy to reduce the output voltage THD, and the effect was remarkable, but did not give the selection method of virtual harmonic impedance and did not analyze the stability of the system. The studies in [ 20 , 21 ] introduced droop control to reduce the THD of the output voltage.…”

Section: Introductionmentioning

confidence: 99%

Investigation of an Output Voltage Harmonic Suppression Strategy of a Power Quality Control Device for the High-End Manufacturing Industry

Wan

et al. 2022

Micromachines

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Due to the influence of nonlinear loads, power quality control devices under the traditional double closed-loop control strategy suffer from a large output voltage harmonic distortion rate and a slow harmonic suppression response and cannot meet the high-quality power supply requirements of high-end manufacturing. A compound control strategy based on voltage feedback and current feed-forward is proposed to solve the voltage quality problem under a nonlinear load. Firstly, based on the mathematical model of power quality control device, the working principle and voltage current coupling relationship are analyzed. Then, an output voltage compound control strategy based on feed-forward and feedback is proposed, and the harmonic suppression mechanisms are deduced and analyzed. Finally, simulation and experimental results are presented to show that, compared with the traditional double closed-loop control strategy, the harmonic suppression effect of the composite control strategy proposed in this paper can be increased by 2.2%, and the response time is decreased to 100 ms.

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Section: Introductionmentioning

confidence: 99%