A Communication-Free Decentralized Control for Grid-Connected Cascaded PV Inverters

Mei Su, Chao Luo, Xiaochao Hou, Wenbin Yuan, Zhangjie Liu, Hua Han and Josep M. Guerrero
Additional contact information
Mei Su: School of Information Science and Engineering, Central South University, Changsha 410083, China
Chao Luo: School of Information Science and Engineering, Central South University, Changsha 410083, China
Xiaochao Hou: School of Information Science and Engineering, Central South University, Changsha 410083, China
Wenbin Yuan: School of Information Science and Engineering, Central South University, Changsha 410083, China
Zhangjie Liu: School of Information Science and Engineering, Central South University, Changsha 410083, China
Hua Han: School of Information Science and Engineering, Central South University, Changsha 410083, China
Josep M. Guerrero: Department of Energy Technology, Aalborg University, DK-9220 Aalborg East, Denmark

Energies, 2018, vol. 11, issue 6, 1-18

Abstract: This paper proposes a communication-free decentralized control for grid-connected cascaded PV inverter systems. The cascaded PV inverter system is an AC-stacked architecture, which promotes the integration of low voltage (LV) distributed photovoltaic (PV) generators into the medium/high voltage (MV/HV) power grid. The proposed decentralized control is fully free of communication links and phase-locked loop (PLL). All cascaded inverters are controlled as current controlled voltage sources locally and independently to achieve maximum power point tracking (MPPT) and frequency self-synchronization with the power grid. As a result, control complexity as well as communication costs are reduced, and the system’s reliability is greatly enhanced compared with existing communication-based methods. System stability and dynamic performance are evaluated by small-signal analysis to guide the design of system parameters. The feasibility and effectiveness of the proposed solution are verified by simulation tests.

Keywords: cascaded inverters; PV inverters; PV generation architecture; decentralized control; frequency self-synchronization (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 (5)

Downloads: (external link)
https://www.mdpi.com/1996-1073/11/6/1375/pdf (application/pdf)
https://www.mdpi.com/1996-1073/11/6/1375/ (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:6:p:1375-:d:149436

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 ().