Leakage Current Reduction in Four-leg Inverter Utilizing Three-Dimensional Virtual Voltage Vector-based Predictive Control

Majid Akbari, S. Alireza Davari, Reza Ghandehari, Freddy Flores-Bahamonde, Jose Rodriguez

Research output: Contribution to conferencePaperpeer-review

Abstract

It is possible to connect PV systems to the electrical grid either with a galvanic isolation transformer (transformer) or without one (transformer-less). Galvanic isolation is provided by the low-frequency transformer; nevertheless, this results in an increase in the transformer's size, cost, and losses. Alternatively, transformer-less PV systems increase leakage current. The leakage current is dependent on a number of characteristics, primarily the topology and switching strategy of the inverter. Since switching scheme change does not require new hardware, it is a cost-effective way to minimize leakage current. Common-mode voltage (CMV) fluctuations in transformer-less systems result in high-frequency harmonics and leakage current flow. This study offers a model predictive current control (MPCC) technique for a three-phase four-leg voltage source inverter using three-dimensional (3-D) virtual voltage vectors (VVVs) or (V3) (VSI). To limit CMV amplitude, leakage current, and overall harmonic distortion of the output current load, only selected vectors are employed. This work presents fresh research into the impact of the suggested method and the use of virtual voltage vectors on leakage current and output current total harmonic distortion (THD) in a two-level, three-phase, four-leg inverter.

Original languageEnglish
DOIs
Publication statusPublished - 2023
Event14th Annual Power Electronics, Drive Systems, and Technologies Conference, PEDSTC 2023 - Babol, Iran, Islamic Republic of
Duration: 31 Jan 20232 Feb 2023

Conference

Conference14th Annual Power Electronics, Drive Systems, and Technologies Conference, PEDSTC 2023
Country/TerritoryIran, Islamic Republic of
CityBabol
Period31/01/232/02/23

Keywords

  • 3-D Predictive Current Control (3-DPCC)
  • Common-Mode Voltage (CMV)
  • Descrete Three-dimensional Virtual Voltage Vectors (3-D-V)
  • Leakage Current (LC)

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Electronic, Optical and Magnetic Materials

Fingerprint

Dive into the research topics of 'Leakage Current Reduction in Four-leg Inverter Utilizing Three-Dimensional Virtual Voltage Vector-based Predictive Control'. Together they form a unique fingerprint.

Cite this