ABSTRACT
Due to the
variable characteristics of photovoltaic energy production, batteries used in
storage systems renewable power can undergo many irregular cycles of charge I discharge.
In turn, this can also have a detrimental effect on the life of the battery and
can increase project costs. This paper presents a study of the storage of
photovoltaic energy by using a hybrid batteries-Supercapacitors system.
Supercapacitors are used to improve batteries life and reduce their stresses.
The photovoltaic cells are connected to DC bus (400V) 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. Some simulation results prove the effectiveness
of the proposed control strategy.
KEYWORDS
1. Photovoltaic,
batteries
2. Supercapacitors
3. DC bus
4. Energy
storage
5. Energy
management
6. Converters
control
SOFTWARE: MATLAB/SIMULINK
This paper
presents the storage photovoltaic energy by using a combination of
Battery-Supercapacitor. Batteries provide energy storage for a relatively long
duration, while SCs can absorb rapid changes in current to reduce the stress on
batteries. The proposed strategy concerned the regulation of the DC bus voltage
for different sources: Photovoltaic, battery and Supercapacitor, despite the
variation of solar irradiation. This enabled an efficient energy management and
ensures continuity of supply. Simulation results show that the proposed control and mangement strategies of DC
bus are effective and able to supply desired power .
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