Abstract
The present paper discusses the modelling and the nonlinear control of a DC/AC conversion system composed of photovoltaic arrays, boost converters, DC bus capacitors, N-cascaded H-bridge multilevel inverters (CHBMI) and an L-filter linked to a single-phase grid. This work aims at achieving threefold control objectives: i) regulating the voltages across the PV panels in order to extract the available maximum power, ii) guaranteeing a unitary power factor (UPF) by forcing the grid current to be sinusoidal and in phase with the electric network voltage, iii) controlling the DC-link voltages to track their given references. The achievement of these objectives is done thanks to a regulator based on a multi-loop structure. Indeed, on one hand, each panel is individually controlled to track the maximum power point; on the other hand, two cascaded loops aim at ensuring a satisfactory power factor correction and DC-link voltages regulation. The proposed regulator is developed using the nonlinear backstepping approach and some tools from Lyapunov stability. The simulation results, obtained using MATLAB/SIMULINK/ SimPowerSystems environment, prove that the synthesized regulator meets its objectives and presents interesting performance in terms of tracking and regulation.
Original language | English |
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Book series | IFAC-PapersOnLine |
Volume | 53 |
Issue number | 2 |
Pages (from-to) | 12859-12864 |
Number of pages | 6 |
ISSN | 2405-8963 |
DOIs | |
Publication status | Published - 2020 |
Event | 21st IFAC World Congress 2020 - Berlin, Germany Duration: 12 Jul 2020 → 17 Jul 2020 |
Conference
Conference | 21st IFAC World Congress 2020 |
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Country/Territory | Germany |
City | Berlin |
Period | 12/07/2020 → 17/07/2020 |
Bibliographical note
Publisher Copyright:Copyright © 2020 The Authors. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0)
Keywords
- Backstepping approach
- Cascaded H-bridge multilevel inverter
- Grid
- Lyapunov
- Nonlinear control
- PFC
- PV system