Due to the variable characteristics of photovoltaic energy production or the variation of the load, batteries used in storage systems renewable power can undergo many irregular cycles of charge 1 discharge. In turn, this can also have a detrimental effect on the life of the battery and can increase project costs. This paper presents an embedded energy share method between the energy storage system (battery) and the auxiliary energy storage system such as supercapacitors (SC). Supercapacitors are used to improve batteries life and reduce their stresses by providing or absorbing peaks currents as demanded by the load. The photovoltaic cells are connected to DC bus with boost converter and controlled with MPPT algorithm, Supercapacitors and batteries are linked to the DC bus through the buck-boost converter. The inductive load is connected to the DC bus by a DC-AC converter. The static converters associated with batteries and supercapacitors are controlled by current. The components of the systems are supervised through a block of energy management. The complete model of the system is implemented in MATLAB/Simulink environment. Simulation results are given to show the performance of the proposed control strategy, for the overall system.

1. ELECTRICAL PROJECTS USING MATLAB/SIMULINK
Gmail: asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245
For Simulation Results of the project Contact Us
Gmail: asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245
Integration of Supercapacitor in Photovoltaic Energy
Storage: Modelling and Control
ABSTRACT
Due to the variable characteristics of photovoltaic energy production or the variation of the load,
batteries used in storage systems renewable power can undergo many irregular cycles of charge 1
discharge. In turn, this can also have a detrimental effect on the life of the battery and can
increase project costs. This paper presents an embedded energy share method between the energy
storage system (battery) and the auxiliary energy storage system such as supercapacitors (SC).
Supercapacitors are used to improve batteries life and reduce their stresses by providing or
absorbing peaks currents as demanded by the load. The photovoltaic cells are connected to DC
bus with boost converter and controlled with MPPT algorithm, Supercapacitors and batteries are
linked to the DC bus through the buck-boost converter. The inductive load is connected to the
DC bus by a DC-AC converter. The static converters associated with batteries and
supercapacitors are controlled by current. The components of the systems are supervised through
a block of energy management. The complete model of the system is implemented in
MATLAB/Simulink environment. Simulation results are given to show the performance of the
proposed control strategy, for the overall system.
KEYWORDS
1. Photovoltaic
2. batteries
3. supercapacitors
4. DC bus
5. Energy storage
6. Energy management

2. ELECTRICAL PROJECTS USING MATLAB/SIMULINK
Gmail: asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245
For Simulation Results of the project Contact Us
Gmail: asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245
7. Converters control
SOFTWARE: MATLAB/SIMULINK
CONCLUSION
In this paper, the storage photovoltaic energy by using a combination of Battery-Supercapacitor
has been presented. First, the modeling of different components of the system has been
addressed. A comparison of different model of SCs is given. Second, a strategy of control and
regulation of the DC bus voltage was proposed, to deal with the variation of solar irradiation
and/or the variation of the load. This controller gives the better an efficient energy management
and ensures continuity of supply by using the methodology that involves a reversible chopper
between the batteries and the DC bus and another between the SC and the DC bus to ensure
stable voltage on the DC bus of 400V. The three operating scenarios show that the proposed
control and management strategies of DC bus are effective and able to supply desired power. It is
also shown that SCs can absorb rapid changes in current to reduce the stress on batteries.
REFERENCES
[1] L. Peiwen, "Energy storage is the core of renewable technologies," Nanotechnol. Mag., vol.
2, no. 4, pp. 13-18, Dec. 2008.
[2] Q. Liyan and Q. Wei, "Constant power control of DFTG wind turbines with supercapacitor
energy storage," iEEE Trans. Ind. Appl., vol. 47, no. I, pp. 359-367, Jan. 2011.
[3] M. Uzunoglu and M. S. Alam, "Dynamic modeling, design, and simulation of a combined PE
M fuel cell and ultracapacitor system for stand-alone residential applications," IEEE Trans.
Energy Convers., vol. 21,no. 3,pp. 767-775,Sep. 2006.
[4] B. P. Roberts and C. Sandberg,'The role of energy storage in development of smart grids,"
Proc. IEEE, vol. 99, no. 6, pp. 1139-1144, June. 2011.

3. ELECTRICAL PROJECTS USING MATLAB/SIMULINK
Gmail: asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245
For Simulation Results of the project Contact Us
Gmail: asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245
[5] A Khaligh and L. Zhihao, "Battery, ultracapacitor, fuel cell, and hybrid energy storage
systems for electric, hybrid electric, fuel cell, and plugin hybrid electric vehicles: State-of-the -
art," IEEE Trans. Veh. Technol, vol. 59, no. 6, pp. 2806-2814, Jully. 2010.