A PLL-Based Controller for Three-Phase Grid-Connected Power Converters

Publikation: Bidrag til tidsskriftTidsskriftartikel

Abstract

The current control of grid-connected converters is typically carried out by using the proportional-resonant controllers or the synchronous reference frame proportional-integral regulators. The implementation of these controllers requires knowledge of the grid voltage frequency/phase angle, which is often provided by a synchronization unit. It implies that dynamics and possible inaccuracies of the synchronization unit have a considerable impact on the current controller performance. The aim of this letter is to design a self-synchronizing current controller by using a conventional synchronous reference frame phase-locked loop (SRF-PLL). In this way, the current controller and synchronization part are merged into a single unit, which results in a simpler and more compact structure. The effectiveness of the proposed controller is verified using experimental results.
Luk

Detaljer

The current control of grid-connected converters is typically carried out by using the proportional-resonant controllers or the synchronous reference frame proportional-integral regulators. The implementation of these controllers requires knowledge of the grid voltage frequency/phase angle, which is often provided by a synchronization unit. It implies that dynamics and possible inaccuracies of the synchronization unit have a considerable impact on the current controller performance. The aim of this letter is to design a self-synchronizing current controller by using a conventional synchronous reference frame phase-locked loop (SRF-PLL). In this way, the current controller and synchronization part are merged into a single unit, which results in a simpler and more compact structure. The effectiveness of the proposed controller is verified using experimental results.
OriginalsprogEngelsk
TidsskriftIEEE Transactions on Power Electronics
Volume/Bind33
Tidsskriftsnummer2
Sider (fra-til)911-916
Antal sider6
ISSN0885-8993
DOI
StatusUdgivet - feb. 2018
PublikationsartForskning
Peer reviewJa
ID: 261081856