An Adaptive Frequency Phase-Locked Loop Based on a Third Order Generalized Integrator

Heng Du, Qiuye Sun, Qifu Cheng, Dazhong Ma and Xu Wang
Additional contact information
Heng Du: College of Information Science and Engineering, Northeastern University, Shenyang 110004, China
Qiuye Sun: College of Information Science and Engineering, Northeastern University, Shenyang 110004, China
Qifu Cheng: College of Information Science and Engineering, Northeastern University, Shenyang 110004, China
Dazhong Ma: College of Information Science and Engineering, Northeastern University, Shenyang 110004, China
Xu Wang: College of Information Science and Engineering, Northeastern University, Shenyang 110004, China

Energies, 2019, vol. 12, issue 2, 1-20

Abstract: In this paper, the basic principle and characteristics of a phase-locked loop (PLL) in a single phase grid-connected system are analyzed, and this paper introduces one type virtual orthogonal voltage vector method based on a third order generalized integrator (TOGI) to construct an alpha and beta static coordinate system. The TOGI structure can eliminate the DC offset in a voltage signal or zero offset in the sampling process, and ensure the amplitude of the virtual orthogonal signal is consistent. At the same time, the adaptive frequency estimation unit is introduced, which can effectively deal with the power grid voltage frequency changes and ensure the accuracy of PLL. MATLAB (R2012a, MathWorks, Natick, MA, USA) is used to simulate the variation of power grid voltage frequency, DC component injection, harmonics injection and other parameters, and the performance of PLL is adequately verified. In addition, a 5kW single-phase energy router experimental platform is built to verify the proposed PLL. The experimental results show that the PLL can well track the frequency change of the grid voltage and eliminate the DC offset, so as to achieve accurate phase tracking.

Keywords: single phase PLL; third order generalized integrator (TOGI); DC offset elimination; adaptive frequency (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: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
https://www.mdpi.com/1996-1073/12/2/309/pdf (application/pdf)
https://www.mdpi.com/1996-1073/12/2/309/ (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:12:y:2019:i:2:p:309-:d:199200

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 ().