A Simple Switching-Frequency-Regulated Sliding-Mode Controller for a VSI With a Full Digital Implementation

This article describes the design of a first-order sliding-mode controller for a voltage source inverter (VSI) operating at a fixed switching frequency. The proposal is simple, as it does not include any integral or resonant action in the switching function, and good results are obtained in terms of...

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Bibliographic Details
Published in:IEEE journal of emerging and selected topics in power electronics 2021-02, Vol.9 (1), p.569-579
Main Authors: Repecho, Victor, Biel, Domingo, Olm, Josep M.
Format: Article
Language:English
Subjects:
Controllers
Current transformers
Dynamic stability
Electric potential
Fixed switching frequency
Harmonic distortion
Hysteresis
Inverters
Microcontrollers
Motion stability
nonlinear load
Performance indices
Robustness
Sliding mode control
sliding-mode control (SMC)
Stability analysis
Switches
Switching
Switching frequency
Tracking errors
Transient response
Voltage
Voltage control
voltage source inverter (VSI)
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Summary:This article describes the design of a first-order sliding-mode controller for a voltage source inverter (VSI) operating at a fixed switching frequency. The proposal is simple, as it does not include any integral or resonant action in the switching function, and good results are obtained in terms of robustness, steady-state tracking error, fast transient response, and low total-harmonic distortion (THD). The implementation methodology using a microcontroller preserves all the benefits of a continuous-time implementation. Moreover, the article analyzes the sliding motion dynamics, and stability conditions are derived. Experimental results obtained with a 2.2-kW inverter show that fixed switching-frequency operation and robust output-voltage regulation with good performance indexes are achieved.
ISSN:2168-6777
2168-6785
DOI:10.1109/JESTPE.2020.2969553