Control of PEM fuel cell distributed generation systems

Wang, C.; Nehrir, M.H.; Gao, Hongwei

doi:10.1109/tec.2005.860404

Cited by 172 publications

(81 citation statements)

References 22 publications

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“…Some DG sources with intermittent features such as wind turbine, PV, the output performance of which is easily affected by environment factors [32,33], are usually controlled by a PQ method to output power according to the given reference or maximum output; while some other DGs such as energy storage battery, which are easily controlled [34], can be controlled by PQ or V/f methods [35]. The control action is mainly applied via the power interface inverter of each DG.…”

Section: Droop Based V/f Control Methodsmentioning

confidence: 99%

Transient Oscillations Analysis and Modified Control Strategy for Seamless Mode Transfer in Micro-Grids: A Wind-PV-ES Hybrid System Case Study

et al. 2015

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Abstract:With the rapid development of the micro-grid associated with new and clean energies, the smooth switching between grid-connected and islanded operation modes of the micro-grid is a key issue that needs to be addressed urgently. In traditional solutions, V/f (Voltage/frequency) control is adopted for the master micro sources when the micro-grid works in islanded mode, while PQ (real and reactive power) control is adopted when in grid-connected mode. However, when the two controllers switch when mode transfer occurs, transient oscillations usually occur and thereafter the dynamic response will be degraded. This paper considers an archetypical micro-grid with Wind-PV-ES (Wind, Photovoltaic and Energy Storage) hybrid system, which forms the basis of our case study. The underlying reason for such transient oscillation is analyzed in this paper. Thereafter a modified control strategy for seamless mode transfer is designed and implemented. An improved PQ control method is designed by which the output of the PQ controller always synchronously tracks the output of the V/f controller for micro-grid switches from islanded mode to grid-connected; furthermore, a dq rotating coordinate synchronization based V/f control method is proposed for transition from grid-connected mode to islanded mode. Finally, experiments and analysis are undertaken on some basic and important operating cases; the results in our case study indicate that the modified control strategy is effective in dominating the micro-grid during mode transfer and thus yielding significantly better performances.

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Section: Droop Based V/f Control Methodsmentioning

confidence: 99%

Transient Oscillations Analysis and Modified Control Strategy for Seamless Mode Transfer in Micro-Grids: A Wind-PV-ES Hybrid System Case Study

et al. 2015

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“…The basic components of this system are a DG power plant, a DC/DC boost converter and a DC/AC inverter. In recent decades, a voltage source inverter (VSI) capable of both grid-tied and stand-alone operations has been suggested [7]- [10]. Available low power DG units can be connected electrically to yield the necessary power for high power applications.…”

Section: Introductionmentioning

confidence: 99%

“…One approach is to connect each DG system separately to the AC utility grid using independent power electronic interfaces. However, using a single DC/AC inverter for all of the DG modules brings the advantages of reduced cost, reduced losses as well as easier design and control of the ICS [7]- [10]. Thus, DG module systems should be aggregated to provide DC input voltage for the DC/AC inverter.…”

Section: Introductionmentioning

confidence: 99%

Grid-Tied and Stand-Alone Operation of Distributed Generation Modules Aggregated by Cascaded Boost Converters

Noroozian

Gharehpetian²,

Abedi³

et al. 2010

Journal of Power Electronics

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This paper presents the modeling, control and simulation of an interconnection system (ICS) of cascaded distributed generation (DG) modules for both grid-tied and stand-alone operations. The overall configuration of the interconnection system is given. The interconnection system consists of a cascaded DC/DC boost converters and a DC/AC inverter. Detailed modeling of the interconnection system incorporating a cascaded architecture has not been considered in previous research. In this paper, suitable control systems for the cascaded architecture of power electronic converters in an interconnection system have been studied and modeled in detail. A novel control system for DC/DC boost converters is presented based on a droop voltage controller. Also, a novel control strategy for DC/AC inverters based on the average large signal model to control the aggregated DG modules under both grid-tied and stand-alone modes is demonstrated. Simulation results indicate the effectiveness of the proposed control systems.

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“…There are numerous economic and societal incentives for increasing the grid capacity to meet this growth without major changes to the existing transmission infrastructure [2,3]. Adding distributed generation (DG) is a viable way to increase grid capacity while providing additional benefits over traditional electricity generation and transmission [2].…”

Section: Introductionmentioning

confidence: 99%

“…Distributed generation, which is the process of generating electricity at or near the point of its use, can both reduce the demand for transmission/generation and provide backup power [3]. Benefits of keeping generation and load physically close include high power quality, reduced transmission losses, reduced dependence on the transmission system, and improved efficiency through combined heat and power systems.…”

Section: Introductionmentioning

confidence: 99%

Applications of one-cycle control to improve the interconnection of a solid oxide fuel cell and electric power system with a dynamic load

Auld

Mueller

Smedley

et al. 2008

Journal of Power Sources

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Adding distributed generation (DG) is a desirable strategy for providing highly efficient and environmentally benign services for electric power, heating, and cooling. The interface between a solid oxide fuel cell (SOFC), typical loads, and the electrical grid is simulated in Matlab/Simulink and analyzed to assess the interactions between DG and the electrical grid. A commercial building load profile is measured during both steady-state and transient conditions. The load data are combined with the following models that are designed to account for physical features: a One-Cycle Control grid-connected inverter, a One-Cycle Control active power filter, an SOFC, and capacitor storage. High penetration of DG without any power filter increases the percentage of undesirable harmonics provided by the grid, but combined use of an inverter and active power filter allows the DG system interconnection to improve the grid tie-line flow by lowering total harmonic distortion and increasing the power factor to unity.

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Control of PEM fuel cell distributed generation systems

Cited by 172 publications

References 22 publications

Transient Oscillations Analysis and Modified Control Strategy for Seamless Mode Transfer in Micro-Grids: A Wind-PV-ES Hybrid System Case Study

Transient Oscillations Analysis and Modified Control Strategy for Seamless Mode Transfer in Micro-Grids: A Wind-PV-ES Hybrid System Case Study

Grid-Tied and Stand-Alone Operation of Distributed Generation Modules Aggregated by Cascaded Boost Converters

Applications of one-cycle control to improve the interconnection of a solid oxide fuel cell and electric power system with a dynamic load

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