Energy-Balance Modeling and Discrete Control for Single-Phase Grid-Connected PV Central Inverters
Meza, C.; Negroni, J.J.; Biel, D.; Guinjoan, F.
Industrial Electronics, IEEE Transactions on
Volume 55, Issue 7, July 2008 Page(s):2734 - 2743
Digital Object Identifier   10.1109/TIE.2008.922595
Summary:This paper presents a two-control loop design considering the nonlinear time-varying characteristics of a single-phase grid-connected photovoltaic (PV) full-bridge central inverter. The control scheme design is based on the energy-balance modeling of the PV system and enables the design of a voltage loop linear discrete controller ensuring the stability of the system for the whole range of PV array operating conditions. A set of experimental results carried out on a laboratory prototype is provided to validate the proposed approach.

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