Feed-forward control of a solid oxide fuel cell system with anode offgas recycle

Carré, Maxime; Brandenburger, Ralf; Friede, Wolfgang; Lapicque, François; Limbeck, Uwe; Silva, Pedro da

doi:10.1016/j.jpowsour.2015.02.053

Cited by 24 publications

(22 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To address the load following issue of SOFC, different conventional and advanced control strategies are available. A feedforward controller is designed to resolve the fuel starvation problem but the system is not very efficient due to the weaknesses of feedforward controller, i.e., sensitive to external disturbances and the occurrence of steady state error [ 25 ]. In [ 26 ], a multi-loop feedforward/feedback control scheme is presented.…”

Section: Introductionmentioning

confidence: 99%

Indirect adaptive soft computing based wavelet-embedded control paradigms for WT/PV/SOFC in a grid/charging station connected hybrid power system

et al. 2017

View full text Add to dashboard Cite

This paper focuses on the indirect adaptive tracking control of renewable energy sources in a grid-connected hybrid power system. The renewable energy systems have low efficiency and intermittent nature due to unpredictable meteorological conditions. The domestic load and the conventional charging stations behave in an uncertain manner. To operate the renewable energy sources efficiently for harvesting maximum power, instantaneous nonlinear dynamics should be captured online. A Chebyshev-wavelet embedded NeuroFuzzy indirect adaptive MPPT (maximum power point tracking) control paradigm is proposed for variable speed wind turbine-permanent synchronous generator (VSWT-PMSG). A Hermite-wavelet incorporated NeuroFuzzy indirect adaptive MPPT control strategy for photovoltaic (PV) system to extract maximum power and indirect adaptive tracking control scheme for Solid Oxide Fuel Cell (SOFC) is developed. A comprehensive simulation test-bed for a grid-connected hybrid power system is developed in Matlab/Simulink. The robustness of the suggested indirect adaptive control paradigms are evaluated through simulation results in a grid-connected hybrid power system test-bed by comparison with conventional and intelligent control techniques. The simulation results validate the effectiveness of the proposed control paradigms.

show abstract

Section: Introductionmentioning

confidence: 99%

Indirect adaptive soft computing based wavelet-embedded control paradigms for WT/PV/SOFC in a grid/charging station connected hybrid power system

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Further advantages are fuel flexibility and fuel pre-processing with reduced complexity [2,[5][6][7]. At system level, an SOFC system with anode-exhaust gas recirculation (AEGR) has the highest potential of electrical efficiency [8]. In such a configuration, a part of the depleted anode-exhaust gas is recirculated and mixed with fresh natural gas prior to entering the reformer, resulting in direct current (DC)efficiencies of up to 65% with DC as system output, which is comparable to large power plants [6,9,10].…”

Section: Introductionmentioning

confidence: 99%

Online characterization of operational parameters in an SOFC system with anode‐exhaust gas recirculation by oxygen sensors

et al. 2021

View full text Add to dashboard Cite

In solid oxide fuel cell (SOFC) system with anode-exhaust gas recirculation (AEGR), a part of the depleted anode-exhaust gas is recirculated and mixed with fresh natural gas prior to entering the reformer, resulting in a high potential of direct current-efficiencies of up to 65%. However, for SOFC systems, it is of crucial importance to monitor relevant characteristic parameters and keep them within safe and durable operating limits. Such characteristic parameters are oxygen-tocarbon-ratio and fuel utilization, which must not exceed system-specific thresholds. Monitoring and control of these characteristic parameters is not trivial and a challenging task due to the enhanced system complexity. The authors present an approach and studies for determination and controlling characteristic parameters in an SOFC system with AEGR based on oxygen sensors. Therefore, the oxygen sensors, being a mature and easily available technology, are aimed to be in the fuel gas path at anode inlet and outlet of an SOFC-stack. Analytical correlations of the output value of oxygen sensors to characteristic parameters and simulative studies on the basis of a reference natural gas composition are shown.Additionally, first results of experimental studies of oxygen sensors in representative gas compositions for the anode inlet and outlet of an SOFC system with AEGR are presented.

show abstract

“…The anode offgas recycle (AOR), through which the anode offgas is partially recycled to the anode inlet, has been used in recent research to increase SOFC system efficiency [31][32][33][34]. For the hydrogen-fueled SOFC system ( Figure 2) decoupling controller designing, the plant output variables are difficult to manage independently because of the lack of control inputs needed to construct the input-output pairs.…”

Section: Introductionmentioning

confidence: 99%

“…The AOR is suitable in managing the system-level decoupling control of hydrogen-fueled SOFC because the hydrogen-fueled SOFC without reform reactions requires less heat generated by the burner for system heat self-sustenance, and the AOR can prevent the excessive hydrogen in the offgas from entering the burner to generate useless heat. Although many previous works have employed the AOR to improve system efficiency [31][32][33][34], its function in system-level control is first investigated in the current study.…”

Section: Introductionmentioning

confidence: 99%

Control System Based on Anode Offgas Recycle for Solid Oxide Fuel Cell System

Zhan

Yang

2018

Mathematical Problems in Engineering

View full text Add to dashboard Cite

The conflicting operation objectives between rapid load following and the fuel depletion avoidance as well as the strong interactions between the thermal and electrical parameters make the SOFC system difficult to control. This study focuses on the design of the decoupling control for the thermal and electrical characteristics of the SOFC system through anode offgas recycling (AOR). The decoupling control system can independently manipulate the thermal and electrical parameters, which interact with one another in most cases, such as stack temperatures, burner temperature, system current, and system power. Under the decoupling control scheme, the AOR is taken as a manipulation variable. The burner controller maintains the burner temperature without being affected by abrupt power change. The stack temperature controller properly coordinates with the burner temperature controller to independently modulate the stack thermal parameters. For the electrical problems, the decoupling control scheme shows its superiority over the conventional controller in alleviating rapid load following and fuel depletion avoidance. System-level simulation under a power-changing case is performed to validate the control freedom between the thermal and electrical characteristics as well as the stability, efficiency, and robustness of the novel system control scheme.

show abstract

Feed-forward control of a solid oxide fuel cell system with anode offgas recycle

Cited by 24 publications

References 17 publications

Indirect adaptive soft computing based wavelet-embedded control paradigms for WT/PV/SOFC in a grid/charging station connected hybrid power system

Indirect adaptive soft computing based wavelet-embedded control paradigms for WT/PV/SOFC in a grid/charging station connected hybrid power system

Online characterization of operational parameters in an SOFC system with anode‐exhaust gas recirculation by oxygen sensors

Control System Based on Anode Offgas Recycle for Solid Oxide Fuel Cell System

Contact Info

Product

Resources

About