Power Management Strategy for a Multi-Hybrid Fuel Cell/Energy Storage Power Generation Systems

 ABSTRACT:

This paper depicts a new form for modular hybrid power change systems, namely, multi-hybrid generation system (MHGS), and parallel relation at the output, such that the converter of each unit part the load current evenly. This is a important step towards produce a modular power conversion system architecture, where smaller units can be related in any series/parallel arrangement to get any needed unit need.

SUPER CAPACITOR

The supercapacitor (SC) as a completing source is used to content for the slow transient reaction of the fuel cell (FC) as a main power source. It help the Fe to meet the grid power request in order to solve a better work and dynamic behavior. Safe control of the planned MHGS with multiple units is also a test issue.

MHGS

In this paper, a simple control method to create active giving of load current among MHGS part is planned. The simulation results verify the work of the  planned form and control system.

KEYWORDS:

  1. Multi-hybrid generation system (MHGS)
  2. Fuel cell (FC)
  3. Dc/dc converter
  4. Supercapacitor (SC)
  5. Average load sharing (ALS)

 SOFTWARE: MATLAB/SIMULINK

 CIRCUIT DIAGRAM:

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Figure 1. Configuration of the FC/SC hybrid system.

 CONTROL SYSTEM:

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Figure 2. Proposed control strategy of hybrid FC/SC power conversion

.EXPECTED SIMULATION RESULTS:

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Figure 3. Dynamic response of MHGS, (a) load active power, (b) output power of hybrid units, (c) FC stack and SC module power of first hybrid umt, and (d) FC stack and SC module power of second hybrid unit.

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Figure 4. Output waveform of (a) dc bus voltage, and (b) dc bus current.

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Figure 5. Waveforms of unit’s (a) hydrogen input flow, (b) hydrogen partial pressure, and (d) oxygen partial pressure.

CONCLUSION:

This paper offer a broad and useful multihybrid FC/SC power creation system form and control method The detailed model of the standard FC/SC hybrid system which contain an FC stack as a main power source and an SC as a integral source is presented.

ALS

In order to balance power part among the units, average load part technique is used. Removal of outer voltage loop of ALS technique im prove and reduces the complexity of the control form. To show the superior dynamic action and power part of the proposed MHGS, results for two parallel hybrid systems are supply.

MICROGRID  

The presented search and the simulation results offer a valuable form with an useful control plan to enhance power quality and executive. These work allow the integration MHGS into complex shared generation systems such as microgrids.

REFERENCES:

[1] P. Chiradeja and R. Ramakumar, “An approach to quantify the technical benefits of distributed generation,” IEEE Trans. Energy Convers., voL 19,no. 4,pp. 764-773,Dec,2004.

[2] B. Wojszczyk, R. Uluski, and F. Katiraei, ‘The role of distributed generation and energy storage in utilities of the future,” in Proc. IEEE PES Gen. Meet., 2008, pp. 1-2.

[3] K. Rajashekara, “Hybrid fuel-cell strategies for clean power generation,” IEEE Trans. Ind Appl., voL 41, no. 3, pp. 682-689, May/Jun. 2005.

[4] 1. M. Carrasco, L. G. Franquelo, 1. T. Bialasiewicz, E. Galvan, R. C. PortilloGuisado, M. A M. Prats, 1. L Leon, and N.Moreno-Alfonso, “Power-electronic systems for the grid integration of renewable energy sources: A survey,” IEEE Trans. Ind Electron., voL 53, no. 4, pp. 1002- 1016, Jun. 2006.

[5] Z. Jiang, and R. A Dougal, “A compact digitally controlled fuel cell/battery hybrid power source,” IEEE Trans. Ind Electron., voL 53, no. 4,pp. 1094-1104,Jun. 2006.

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