Modeling and Sizing of Supercapacitors

Petreuş, Dorin; Moga, D.; Gălătuș, Ramona; Munteanu, Radu

doi:10.4316/aece.2008.02003

Cited by 25 publications

(12 citation statements)

References 5 publications

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“…Therefore, it is supposed that initial voltage for supercapacitor is 250 V. The average current that should be supplied by the supercapacitor bank corresponds to the average of the maximum and minimum current demands from the supercapacitor bank [20] …”

Section: Simulation Resultsmentioning

confidence: 99%

Voltage Control and Active Power Management of Hybrid Fuel-Cell/Energy-Storage Power Conversion System Under Unbalanced Voltage Sag Conditions

Hajizadeh

Golkar

Feliachi

2010

IEEE Trans. Energy Convers.

110

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This paper concentrates on the control of hybrid fuelcell (FC)/energy-storage distributed generation (DG) systems under voltage sag in distribution systems. The proposed control strategy makes hybrid DG system work properly when a voltage disturbance occurs in distribution system, and it stays connected to the main grid. To distribute the power between dc power sources and stabilize the dc-link power, a Lyapunov-based neuro-fuzzy control strategy has been developed. This controller determines the supercapacitor power that should be generated according to the amount of available energy in dc-link. Also, current control strategies for the FC converter (boost) and supercapacitor converter (buck-boost converter) are designed by proportional-integral and sliding-mode control consequently. Moreover, a complementary control strategy for voltage source converter based on positive and negative symmetrical components is presented to investigate the voltage sag ride-through and voltage control capability. The hybrid system is studied under unbalance voltage sag condition. Simulation results are given to show the overall system performance including active power control and voltage sag ride-through capability of the hybrid DG system.

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Section: Simulation Resultsmentioning

confidence: 99%

Voltage Control and Active Power Management of Hybrid Fuel-Cell/Energy-Storage Power Conversion System Under Unbalanced Voltage Sag Conditions

Hajizadeh

Golkar

Feliachi

2010

IEEE Trans. Energy Convers.

110

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“…The electrical parallel resistance is neglected because it influences the long-term SC performance which is not the concern of this study. According to the design specifications, the SC is adopted, wherein the capacitance equation is as follows [23]: (1) where is the discharging travel time, and are the initial voltage before discharging and the final voltage after discharging respectively.…”

Section: A Modeling Of the Fc Stack And Sc Modulementioning

confidence: 99%

Active Power Management of Multihybrid Fuel Cell/Supercapacitor Power Conversion System in a Medium Voltage Microgrid

Ghazanfari

Hamzeh

Mokhtari

et al. 2012

IEEE Trans. Smart Grid

140

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This paper proposes a hierarchical active power management strategy for a medium voltage (MV) islanded microgrid including a multihybrid power conversion system (MHPCS). To guarantee excellent power management, a modular power conversion system is realized by parallel connection of small MHPCS units. The hybrid system includes fuel cells (FC) as main and supercapacitors (SC) as complementary power sources. The SC energy storage compensates the slow transient response of the FC stack and supports the FC to meet the grid power demand. The proposed control strategy of the MHPCS comprises three control loops; dc-link voltage controller, power management controller, and load current sharing controller. Each distributed generation (DG) unit uses an adaptive proportional resonance (PR) controller for regulating the load voltage, and a droop control strategy for average power sharing among the DG units. The performance of the proposed control strategy is verified by using digital time-domain simulation studies in the PSCAD/EMTDC software environment. Index Terms-Fuel cell (FC), multihybrid power conversion system (MHPCS), MV microgrid, supercapacitor (SC).

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“…The electrical parallel resistance (EPR) is neglected because EPR influences the long-term SC performance which is not the concern of this study. The average current which should be supplied by the SC module is calculated in [22]. In practical applications, the SC are built up with modules of serial connected single cells packed with adjacent parallel connected modules to acquire required capacitance and terminal voltage.…”

Section: B Modeling Of the Scmentioning

confidence: 99%

Power management strategy for a multi-hybrid fuel cell/energy storage power generation systems

Ghazanfari

Hamzeh

Mokhtari

2012

2012 3rd Power Electronics and Drive Systems Technology (PEDSTC)

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This paper depicts a new configuration for modular hybrid power conversion systems, namely, multi-hybrid generation system (MHGS), and parallel connection at the output, such that the converter of each unit shares the load current equally. This is a significant step towards realizing a modular power conversion system architecture, where smaller units can be connected in any series/parallel grouping to realize any required unit specifications. The supercapacitor (SC) as a complementary source is used to compensate for the slow transient response of the fuel cell (FC) as a main power source. It assists the Fe to meet the grid power demand in order to achieve a better performance and dynamic behavior. Reliable control of the proposed MHGS with multiple units is also a challenging issue. In this paper, a simple control method to achieve active sharing of load current among MHGS modules is proposed. The simulation results verify the performance of the proposed structure and control scheme.

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Modeling and Sizing of Supercapacitors

Cited by 25 publications

References 5 publications

Voltage Control and Active Power Management of Hybrid Fuel-Cell/Energy-Storage Power Conversion System Under Unbalanced Voltage Sag Conditions

Voltage Control and Active Power Management of Hybrid Fuel-Cell/Energy-Storage Power Conversion System Under Unbalanced Voltage Sag Conditions

Active Power Management of Multihybrid Fuel Cell/Supercapacitor Power Conversion System in a Medium Voltage Microgrid

Power management strategy for a multi-hybrid fuel cell/energy storage power generation systems

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