An Efficient Hybrid Filter-Based Phase-Locked Loop under Adverse Grid Conditions

Nanmu Hui, Dazhi Wang and Yunlu Li
Additional contact information
Nanmu Hui: School of Information Science & Engineering, Northeastern University, Shenyang 110819, Liaoning, China
Dazhi Wang: School of Information Science & Engineering, Northeastern University, Shenyang 110819, Liaoning, China
Yunlu Li: School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, Liaoning, China

Energies, 2018, vol. 11, issue 4, 1-18

Abstract: Synchronous-reference-frame phase-locked loop (SRF-PLL) is widely used in grid synchronization applications. However, under unbalanced, distorted and DC offset mixed grid conditions, its performance tends to worsen. In order to improve the filtering capability of SRF-PLL, a modified three-order generalized integrator (MTOGI) with DC offset rejection capability based on conventional three order generalized integrator (TOGI) and an enhanced delayed signal cancellation (EDSC) are proposed, then dual modified TOGI (DMTOGI) filtering stage is designed and incorporated into the SRF-PLL control loop with EDSC to form a new hybrid filter-based PLL. The proposed PLL can reject the fundamental frequency negative sequence (FFNS) component, DC offset component, and the rest of harmonic components in SRF-PLL input three-phase voltages at the same time with a simple complexity. The proposed PLL in this paper has a faster transient response due to the EDSC reducing the number of DSC operators. A small-signal model of the proposed PLL is derived. The stability is analyzed and parameter design guidelines are given. Experimental results are included to validate the effectiveness and robustness of the proposed PLL.

Keywords: harmonic; DC offset; three order generalized integrator (TOGI); delayed signal cancellation; phase locked loop (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

Downloads: (external link)
https://www.mdpi.com/1996-1073/11/4/703/pdf (application/pdf)
https://www.mdpi.com/1996-1073/11/4/703/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:11:y:2018:i:4:p:703-:d:137307

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().