A mathematical model of SOFC power plant for dynamic simulation of multi-machine power systems

Safari, Amin; Shahsavari, Hossein; Salehi, Javad

doi:10.1016/j.energy.2018.02.068

Cited by 19 publications

(13 citation statements)

References 20 publications

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“…These models range from zero-dimensional (0-D) ones, which are lumped models using concentrated parameters and which can only relate to cell global proprieties, to three dimensional (3-D) ones, which are detailed models using distributed parameters and can describe cell local proprieties on the three spatial coordinates. The use of any one of these types of models depends of the research aims: Usually 3-D and 2-D models concern phenomena investigation, while 1-D and 0-D models are related to control purposes [6][7][8][9][10][11].…”

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confidence: 99%

A 2-D model for Intermediate Temperature Solid Oxide Fuel Cells Preliminarily Validated on Local Values

et al. 2019

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Intermediate Temperature Solid Oxide Fuel Cell (IT-SOFC) technology offers interesting opportunities in the panorama of a larger penetration of renewable and distributed power generation, namely high electrical efficiency at manageable scales for both remote and industrial applications. In order to optimize the performance and the operating conditions of such a pre-commercial technology, an effective synergy between experimentation and simulation is fundamental. For this purpose, starting from the SIMFC (SIMulation of Fuel Cells) code set-up and successfully validated for Molten Carbonate Fuel Cells, a new version of the code has been developed for IT-SOFCs. The new release of the code allows the calculation of the maps of the main electrical, chemical, and physical parameters on the cell plane of planar IT-SOFCs fed in co-flow. A semi-empirical kinetic formulation has been set-up, identifying the related parameters thanks to a devoted series of experiments, and integrated in SIMFC. Thanks to a multi-sampling innovative experimental apparatus the simultaneous measurement of temperature and gas composition on the cell plane was possible, so that a preliminary validation of the model on local values was carried out. A good agreement between experimental and simulated data was achieved in terms of cell voltages and local temperatures, but also, for the first time, in terms of local concentration on the cell plane, encouraging further developments. This numerical tool is proposed for a better interpretation of the phenomena occurring in IT-SOFCs and a consequential optimization of their performance.

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confidence: 99%

A 2-D model for Intermediate Temperature Solid Oxide Fuel Cells Preliminarily Validated on Local Values

et al. 2019

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“…Figure indicates the block diagram of the SOFC generator, which is perfectly applicable, and its dynamic model is presented as follows based on models of previous studies …”

Section: Problem Formulationmentioning

confidence: 99%

“…synchronous generator (SG); solid oxide fuel cell (SOFC); wind turbine (WT) Figure 2 indicates the block diagram of the SOFC generator, which is perfectly applicable, and its dynamic model is presented as follows based on models of previous studies. [3][4][5][6][7][8][9][10] The SOFC dynamic describes the control process and the output current SOFC, I fc , which is represented by (8). A first-order transfer function is used for dynamical modeling with a time constant of about 0.8.…”

Section: Modeling An Sofc Figurementioning

confidence: 99%

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Modeling of integrated power system with wind turbine based on a doubly fed induction generator and solid oxide fuel cell for small‐signal stability analysis

Safari

Badr

Farrokhifar

2019

Int Trans Electr Energ Syst

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Summary This paper aims to propose the small‐signal model of a wind turbine (WT) based on a doubly fed induction generator (DFIG) and a solid oxide fuel cell (SOFC) into the transmission network for dynamic stability analysis of the integrated system. The principal goal is to introduce the novel small‐signal model of the hybrid power system in the presence of the WT and SOFC power plants for analyzing of electromechanical oscillations. Therefore, the modeling of each generation unit of the integrated system in the same framework is illustrated. Besides, a comprehensive mathematical model is demonstrated from WT and SOFC units integrated with a synchronous generator (SG) and the infinite bus system. Based on the proposed model, the linear analysis is illustrated under different conditions for stability studies. Moreover, this study presents the influence of different portions of WT and SOFC units on the small‐signal stability. The simulation results represent the performance of the suggested model.

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“…Such disturbance can lead the power system to lose its partial or total stability. erefore, many researchers focus on the stability of electric power systems in scientific and engineering studies [2][3][4][5], especially on an equivalent single-machine infinite-bus (SMIB) power system. e model of the swing equation has attracted great interest in the last decades due to its wide application in the research of stability of such power system.…”

Section: Introductionmentioning

confidence: 99%

Chaotic Threshold for a Class of Power System Model

Wang

Song

2019

Shock and Vibration

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This paper deals with the bifurcation and chaotic dynamic characteristic of a single-machine infinite-bus (SMIB) power system under two kinds of harmonic excitation disturbance, which are induced by the external periodic load and the outer mechanical disturbance. By applying Melnikov’s method, the threshold value for the occurrence of chaotic motion is provided. In addition, the chaotic boundary surface is given. The efficiency of the criteria for chaotic motion obtained in this paper is verified by bifurcation diagram, phase portraits, Poincaré section, and frequency spectrum. The results obtained in this paper will provide a better understanding of the nonlinear dynamic behaviors for this class of SMIB power system subjected to two kinds of harmonic excitation components.

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A mathematical model of SOFC power plant for dynamic simulation of multi-machine power systems

Cited by 19 publications

References 20 publications

A 2-D model for Intermediate Temperature Solid Oxide Fuel Cells Preliminarily Validated on Local Values

A 2-D model for Intermediate Temperature Solid Oxide Fuel Cells Preliminarily Validated on Local Values

Modeling of integrated power system with wind turbine based on a doubly fed induction generator and solid oxide fuel cell for small‐signal stability analysis

Chaotic Threshold for a Class of Power System Model

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