Grid Voltage Sensorless Control of Three-Phase LCL Grid-Connected Inverters Using Multisampled Current

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

2 Citations (Scopus)

Abstract

This paper presents a grid voltage sensorless control strategy for three-phase LCL-type grid-connected inverters by only using inverter current. The capacitor voltage is estimated based on linear regression of the multisampled current during zero voltage vectors, which is used for the grid synchronization in a phase-locked loop (PLL). Single-loop control with inverter current feedback is employed because the multisampling can reduce control delays and extend the stability range. Moreover, based on the fast response of multisampling control, the inverter current feedforward is utilized to compensate the impact of the grid on the inrush current. Finally, the effectiveness of the proposed method is verified through the simulation.

Original languageEnglish
Title of host publication2020 IEEE 9th International Power Electronics and Motion Control Conference (IPEMC 2020-ECCE Asia)
Number of pages5
PublisherIEEE (Institute of Electrical and Electronics Engineers)
Publication date2020
Pages2002-2006
Article number9367836
ISBN (Print)978-1-7281-5302-5
ISBN (Electronic)978-1-7281-5301-8
DOIs
Publication statusPublished - 2020
Event2020 IEEE 9th International Power Electronics and Motion Control Conference (IPEMC2020-ECCE Asia) - Nanjing, China
Duration: 29 Nov 20202 Dec 2020

Conference

Conference2020 IEEE 9th International Power Electronics and Motion Control Conference (IPEMC2020-ECCE Asia)
Country/TerritoryChina
CityNanjing
Period29/11/202002/12/2020
Series2020 IEEE 9th International Power Electronics and Motion Control Conference, IPEMC 2020 ECCE Asia

Keywords

  • grid voltage estimation
  • grid-connected inverter
  • linear regression
  • multisampling

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