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A Guide to Concentration Alternating Frequency Response Analysis of Fuel Cells

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Published on: December 11, 2019

Passivity-Based Control for Output Voltage Regulation in a Fuel Cell/Boost Converter System.

Carlo A Beltrán¹, Luis H Diaz-Saldierna², Diego Langarica-Cordoba¹

¹Faculty of Sciences, Autonomous University of San Luis Potosi (UASLP), Av. Chapultepec 1570, San Luis Potosi 78295, Mexico.

|January 21, 2023

Summary

This summary is machine-generated.

This study introduces a passivity-based control (PBC) for fuel-cell/boost converter systems. The novel current-mode control (CMC) scheme ensures precise voltage regulation and robust performance against system uncertainties.

Keywords:

fuel cells parameter estimation passivity-based control power converters

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Area of Science:

Electrical Engineering
Control Systems
Renewable Energy Systems

Background:

Fuel cells are crucial for clean energy, but their integration with power electronics requires sophisticated control.
Boost converters are essential for voltage regulation in fuel cell systems.
Output voltage stability is critical for reliable fuel cell operation.

Purpose of the Study:

To design and validate a passivity-based control (PBC) scheme for output voltage regulation in fuel-cell/boost converter systems.
To enhance system robustness against parameter uncertainties.
To demonstrate the control scheme's effectiveness through real-time simulations.

Main Methods:

A current-mode control (CMC) scheme with nested voltage and current loops was designed.
The inner current loop utilized Euler-Lagrange (E-L) formulation for standard PBC.
An adaptive law based on immersion and invariance (I&I) theory was developed for parameter approximation.
Real-time simulations were conducted to test the closed-loop system.

Main Results:

The proposed PBC scheme achieved precise output voltage regulation.
The system demonstrated robustness against variations in fuel cell voltage, load, and output voltage reference.
Asymptotic approximation of uncertain parameters (load, parasitic resistance) was achieved.
Real-time simulations confirmed the control scheme's effectiveness and stability.

Conclusions:

The designed passivity-based control scheme effectively regulates output voltage in fuel-cell/boost converter systems.
The adaptive law enhances system robustness by handling parameter uncertainties.
The study validates the proposed control strategy's performance and reliability for renewable energy applications.