Wide Bandwidth Control for Multi-Parallel Grid-Connected Inverters with Harmonic Compensation

Jingrong Yu, Limin Deng, Dongran Song and Maolin Pei
Additional contact information
Jingrong Yu: School of Information Science and Engineering, Central South University, Changsha 410083, China
Limin Deng: School of Information Science and Engineering, Central South University, Changsha 410083, China
Dongran Song: School of Information Science and Engineering, Central South University, Changsha 410083, China
Maolin Pei: Jiangxi Electric Power Research Institute, Nanchang 330096, China

Energies, 2019, vol. 12, issue 3, 1-22

Abstract: This paper proposes a virtual impedance-based bandwidth control method for multi-parallel harmonic-compensation grid-connected inverters (HCGIs). Firstly, the influence of the resonance points caused by the interaction of multiple HCGIs on the control bandwidth is analyzed, and the analysis result shows that the control bandwidth becomes narrow due to the appearance of a new resonance point. Then, to increase the control bandwidth of multi-parallel HCGIs, six different types of virtual impedance circuits are constructed and compared, and the bandwidth control method based on virtual impedance by capacitor voltage feedback is proposed. Following that, the relationship between feedback coefficient and bandwidth is established, the design approach of parameters for the proposed method is presented. Finally, the proposed method is confirmed by the simulation and experimental tests. The simulation and experimental results show that the proposed control method can effectively shift resonance frequencies right to solve the issue of control bandwidth reduction in multi-parallel HCGIs systems, while without affecting the low-frequency harmonic current compensation.

Keywords: harmonic-compensation grid-connected inverters; multiple parallel; control bandwidth; virtual impedance; capacitor voltage feedback (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 references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.mdpi.com/1996-1073/12/3/571/pdf (application/pdf)
https://www.mdpi.com/1996-1073/12/3/571/ (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:3:p:571-:d:205198

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 ().