A Comparison of a Discrete-Time PI and an Indirect MPC Current Controllers for a Single-Phase Grid-Connected Inverter Operating with Distorted Grid and Significant Computation Feedback Delay

Sergio Pires Pimentel, Oleksandr Husev, Dmitri Vinnikov, Serhii Stepenko, Lauri Kutt, Jose Rodriguez

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this paper, one technical gap related to the indirect model predictive control (MPC) is discussed. This technical gap corresponds to the performance of such a controller to deal with distorted grid voltages and a significant computation delay through the feedback regulation loop. A basic case study involving a traditional 3-level h-bridge and a first-order output filter was considered in order to magnify the effect of time horizon prediction and voltage over the regulated grid current waveform. A comparison related to the covered MPC controller (in two different forms) and a classical discrete-time proportional-integral (PI) controller is performed by means of the achieved total harmonic distortion (THD) values. Simulation results from a model built on PSIM/Powersim are presented and discussed. It can be concluded that the MPC controller offers a wider operating range with stable conditions and lower measured values of THD from regulated grid current. And such kind of special feature becomes even more evident if a significant computation delay at the feedback control loop must be overtaken.

Original languageEnglish
Title of host publication2019 IEEE 15th Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference, COBEP/SPEC 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728141800
DOIs
Publication statusPublished - Dec 2019
Event15th IEEE Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference, COBEP/SPEC 2019 - Santos, Brazil
Duration: 1 Dec 20194 Dec 2019

Publication series

Name2019 IEEE 15th Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference, COBEP/SPEC 2019

Conference

Conference15th IEEE Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference, COBEP/SPEC 2019
Country/TerritoryBrazil
CitySantos
Period1/12/194/12/19

Keywords

  • Discrete-time Systems
  • Distributed Power Generation
  • Industrial Applications
  • Power Electronics
  • Predictive Control

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Safety, Risk, Reliability and Quality
  • Computer Networks and Communications
  • Hardware and Architecture
  • Energy Engineering and Power Technology
  • Control and Optimization

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