Application of flywheel battery in solar power system
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GHOUSIA COLLEGE OF ENGINEERING RAMANAGARAM. Application of flywheel battery in solar power system. Und er guidance:. ASST.PROF. DEPARTMENT OF ELECTRICAL &ELECTRONICS ENGG. INTRODUCTION.

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Application of flywheel battery in solar power system

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GHOUSIA COLLEGE OF ENGINEERING

RAMANAGARAM

Application of flywheel battery in solar power system

Under guidance:

ASST.PROF.

DEPARTMENT OF ELECTRICAL &ELECTRONICS ENGG.


INTRODUCTION

  • It is designed in which the flywheel battery saves and releases energy when necessary.

  • Flywheel battery resolves the problem of incapability of solar power supply at night and delays the time of supply.

  • Output characteristics of photovoltaic cell are optimized in this system.

  • Quality & reliability in power supply is greatly improved.


Modes of Operation

  • Mode 1: No energy is required by the load, and all energy generated by the PV array is stored in the flywheel.

  • Mode 2: The PV energy is greater than the load and

    the surplus is stored in the flywheel.

  • Mode 3: The PV energy is less than the load and

    the flywheel supplements the necessary energy to match the load.

  • Mode 4: No PV energy is generated and the

    flywheel supplies the load until fully discharged


Modes of operation


PHOTOVOLTAIC CELL

  • A solar cell or photovoltaic cell is a device that converts sunlight directly into electricity by the photovoltaic effect.

  • Solar cell is configured as a large-area p-n junction made from silicon.

  • If a piece of p-type silicon is placed in contact with a piece of n-type silicon, then a diffusion of electrons occurs from the region of high electron concentration to low electron concentration.

  • when the electrons diffuse across the p-n junction, they recombine with holes on the p-type side.


The electric field established across the p-n junction creates a diode that promotes charge flow, known as drift current.

  • This region where electrons and holes have diffused across the junction is called the depletion region.

  • This region no longer contains any mobile charge carriers known as the space charge region.


Diagram of Flywheel energy storage unit


Merits of Flywheel energy storage unit

  • Highly efficient, Non-polluting.

  • Reliable, Long life.

  • Easily and inexpensively maintained, and safe.

  • Much higher charging and discharging rate.

  • Able to cyclic discharged to zero energy

    without degrading

  • The storage capacity is independent of temperature

    fluctuations.

  • Much higher energy storage efficiencies.

  • High power output.


POWER REGULATION AND CONDITIONING

  • Regulator circuitry is required to cyclically bring the energy storage system on- and off-line to maintain a constant supply of energy available to the load.

  • If the PV array output dropped below a certain threshold, the PV would be disconnected from the load to be replaced by the flywheel battery which would begin to decelerate and discharge.

  • If the PV output rise above a certain threshold, the flywheel battery would be disconnected from the load and would begin to accelerate & charge from a port of the array's output.

  • Once the flywheel reached its design speed, it would not require any further charging due to its long rundown time-constant.


FLYWHEEL BATTERY USED IN SOME DIFFERENT AREAS ARE SHOWN BELOW :

Wasted heat is storage


Storage system


Satellite Placed in


Head phone battery


CONCLUSION

  • Reduce cost of flywheel rotor and advanced magnetic bearing.

  • Mass will produced with quality.

  • Develop light weight vacuum containment vessel.

  • Reduced over all system weight.

  • With the proposed system, the PV array can satisfy the load for a prolonged duration.


REFERENCES

  • Tang Shuangqing Zuo Weiwei Liao Daoxum A new flywheel energy storage system for distributed generation.

  • Jiancheng Zhang; Zhiye Chen; Lijun Cai; Yuhua Zhao. "Flywheel energy storage system design for distribution network", IEEE on Power Engineering Society Winter Meeting, 2000, Vol. 4: 2619 –2623.

  • Yuanfang Zhou, Renshan Xiao, Jingzhang Liao, Shizuo Li. "Design Researches on Rare-Earth Permanent Magnetic Brushless D.C. Motors", Guangxi Elctric Power Technology in China, 1996, Vol. 2:15-20.

  • Reinke, L.J. "Tutorial overview of flywheel energy storage in a photovoltaic power generation system", vol.2: 1161 –1164.


THANK YOU


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