Title:
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Energy-balance control of PV cascaded multilevel grid-connected inverters under level-shifted and phase-shifted PWMs
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Author:
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Chavarría Roé, Javier; Biel Solé, Domingo; Guinjoan Gispert, Francisco; Meza Benavides, Carlos; Negroni Vera, Juan José
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Other authors:
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Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica; Universitat Politècnica de Catalunya. ACES - Control Avançat de Sistemes d'Energia; Universitat Politècnica de Catalunya. EPIC - Energy Processing and Integrated Circuits |
Abstract:
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This paper presents an energy-balance control strat-
egy for a cascaded single-phase grid-connected H-bridge multi-
level inverter linking
n
independent photovoltaic (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 array operating conditions.
The control design is adapted to phase-shifted and level-shifted
carrier pulsewidth modulations to share the control action among
the cascade-connected 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 seven-level inverter are included to validate the proposed
approach. |
Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria electrònica::Electrònica de potència -Àrees temàtiques de la UPC::Informàtica::Automàtica i control -Discrete-time systems -Cascaded H-bridge inverters -Discrete-time control -Grid-connected PV systems -Multilevel modulations -Sistemes discrets en temps -Control automàtic -Sistemes de control -Semiconductors de potència -Controladors |
Rights:
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Document type:
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Article - Published version Article |
Published by:
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Institute of Electrical and Electronics Engineers (IEEE)
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