A communication-free decentralized control for grid-connected cascaded pv inverters

Mei Su, Chao Luo, Xiaochao Hou, Wenbin Yuan, Zhangjie Liu*, Hua Han, Josep M. Guerrero

*Kontaktforfatter

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10 Citationer (Scopus)
130 Downloads (Pure)

Abstrakt

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.
OriginalsprogEngelsk
Artikelnummer1375
TidsskriftEnergies
Vol/bind11
Udgave nummer6
Sider (fra-til)1-18
Antal sider18
ISSN1996-1073
DOI
StatusUdgivet - maj 2018

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