Robust disturbance rejection control of grid-connected fuel cell converters with grid support ability under unbalanced faults

This work proposes a high-performance, robust and low-complexity control strategy for grid-connected fuel cell converters that operate under several performance limiting conditions such as grid faults, parametric and modeling uncertainties, unknown disturbances, step changes and noise. The strategy...

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Bibliographic Details
Published in:Energy systems (Berlin. Periodical) Vol. 11; no. 3; pp. 673 - 698
Main Authors: Sabir, Adeel, Ibrir, Salim
Format: Journal Article
Language:English
Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.08.2020
Springer Nature B.V
Subjects:
Complexity
Controllers
Converters
Distributed generation
Disturbances
Economics and Management
Energy
Energy Policy
Energy Systems
Faults
Fuel cells
Fuel technology
Operations Research/Decision Theory
Optimization
Original Paper
Phase locked loops
Rejection
Repetitive control
Robust control
Strategy
Uncertainty
Robust control
Fault ride-through
Distributed generation
Fuel cells
Disturbance rejection control
Repetitive control
ISSN:1868-3967, 1868-3975
Online Access:Get full text
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Summary:This work proposes a high-performance, robust and low-complexity control strategy for grid-connected fuel cell converters that operate under several performance limiting conditions such as grid faults, parametric and modeling uncertainties, unknown disturbances, step changes and noise. The strategy enables the fuel cell-based distributed generators to ride through balanced and unbalanced grid faults and fulfills the modern grid code requirements that mandate them to actively support the grid in case of contingencies. The controller is built by combining disturbance rejection control and repetitive control, both having simple structures and attractive performance features. Moreover, during grid faults, the strategy manages to keep the active power delivered to the grid constant and the phase currents sinusoidal, without a phase locked loop or the positive and negative sequence components of the unbalanced grid voltages or currents. As a result, the controller’s computational and structural complexity are reduced without compromising its performance. Several test cases are run using the SimPowerSystems TM toolbox of MATLAB/Simulink computing environment to demonstrate the response of the proposed strategy and ascertain its performance under grid faults, parametric uncertainties, noise and unknown disturbances.
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ISSN:1868-3967
1868-3975
DOI:10.1007/s12667-019-00332-4