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00925njm 22002777a 4500 dc Chavarría Roé, Javier author Biel Solé, Domingo author Guinjoan Gispert, Francisco author Meza Benavides, Carlos author Negroni Vera, Juan José author 2012-01-26 This paper presents an energy-balance control strategy for a cascaded single-phase grid-connected H-bridge multilevel inverter linking n independent PV arrays to the grid. The control scheme is based on an energy-sampled data model of the PV system and enables the design of a voltage loop linear discrete controller for each array ensuring the stability of the system for the whole range of PV arrays operating conditions. The control design is adapted to Phase-Shifted and Level-Shifted Carrier PWM to share the control action among the cascadeconnected bridges in order to concurrently synthesize a multilevel waveform and to keep each of the PV arrays at its maximum power operating point. Experimental results carried out on a 7-level inverter are included to validate the proposed approach. Peer Reviewed Postprint (published version) Àrees temàtiques de la UPC::Matemàtiques i estadística Discrete-time systems. Control theory. Control, Teoria de Models matemàtics Sistemes discrets en temps Energy-balance control of PV cascaded multilevel grid-connected inverters under level-shifted and phase-shifted PWMs