Model-Predictive Control to Minimize Ground Potentials in Transformerless Grid-Connected 5-Level Power Electronic Converters

S. A. Saleh, R. Ahshan, A. Al-Durra

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

This paper presents the development and testing of a model-predictive control (MPC) for three phase (3φ) transformerless grid-connected 5-level power electronic converters (PECs). The proposed MPC employs a discrete-time model of 5-level PECs to predict the future values of the grid-injected currents and ground potential. predicted values of the grid-injected currents and ground potential are used to set the reference signals to minimize a cost function, which is formulated in terms of the command and actual grid-injected current and ground potential. The tested MPC is implemented for transformerless grid-connected diode-clamped and flying-capacitor 5-level PECs under different conditions. Test results show that the developed MPC can operate transformerless grid-connected PECs to ensure accurate, dynamic, and fast responses to changes in the power injected into the grid. Furthermore, the tested control demonstrates a good ability to minimize ground potentials during steady-state and step changes in the power delivered to/from the grid.

Original languageEnglish
Title of host publication2021 IEEE/IAS 57th Industrial and Commercial Power Systems Technical Conference, I and CPS 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728186320
DOIs
Publication statusPublished - Apr 27 2021
Externally publishedYes
Event57th IEEE/IAS Industrial and Commercial Power Systems Technical Conference, I and CPS 2021 - Las Vegas, United States
Duration: Apr 27 2021Apr 30 2021

Publication series

NameConference Record - Industrial and Commercial Power Systems Technical Conference
Volume2021-April

Conference

Conference57th IEEE/IAS Industrial and Commercial Power Systems Technical Conference, I and CPS 2021
Country/TerritoryUnited States
CityLas Vegas
Period4/27/214/30/21

Keywords

  • ground potentials
  • model predictive control
  • Multi-level power electronic converters
  • power system grounding

ASJC Scopus subject areas

  • Engineering(all)

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