This paper presents the comparative analysis between constant duty cycle and Perturb & Observe (P&O) algorithm for extracting the power from Photovoltaic Array (PVA). Because of nonlinear characteristics of PV cell, the maximum power can be extract under particular voltage condition. Therefore, Maximum Power Point Tracking (MPPT) algorithms are used in PVA to maximize the output power. In this paper the MPPT algorithm is implemented using Ćuk converter. The dynamics of PVA is simulated at different solar irradiance and cell temperature. The P&O MPPT technique is a direct control method enables ease to implement and less complexity.

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Simulation and Analysis of Perturb and Observe MPPT
Algorithm for PV Array Using ĊUK Converter
ABSTRACT:
This paper presents the comparative analysis between constant duty cycle and Perturb & Observe
(P&O) algorithm for extracting the power from Photovoltaic Array (PVA). Because of nonlinear
characteristics of PV cell, the maximum power can be extract under particular voltage condition.
Therefore, Maximum Power Point Tracking (MPPT) algorithms are used in PVA to maximize
the output power. In this paper the MPPT algorithm is implemented using Ćuk converter. The
dynamics of PVA is simulated at different solar irradiance and cell temperature. The P&O MPPT
technique is a direct control method enables ease to implement and less complexity.
KEYWORDS
1. Photovoltaic Array (PVA)
2. MPPT
3. ĆUK Converter
SOFTWARE: MATLAB/SIMULINK

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BLOCK DIAGRAM:
Fig. 1: Block Diagram of MPPT Using PI Controller
Fig. 2: Block Diagram of Direct Duty Cycle (δ) Control MPPT

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EXPECTED SIMULATION RESULTS:
Fig. 3: MATLAB/SIMULINK Model of PVCC for δ =0.6

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Fig. 4: Output Power Curve of the PV Module and Ćuk Converter for Constant δ = 0.6 and
Different β.

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Fig. 5: Output Power Curve of the PV Module and Ćuk Converter for Constant δ = 0.6 and
Different T
Fig. 6: MATLAB/SIMULINK Model of PVCC Using P & O Algorithm

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Fig. 7: Output Power Curve of the PV Module and Ćuk Converter for Different β and P&O
MPPT
Fig. 8: Output Power Curve of the PV Module and Ćuk Converter for Different T and P & O
MPPT.

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CONCLUSION:
In this paper, P&O and constant duty cycle algorithm of MPPT is implemented using ĆUK
converter. The model is simulated with MATLAB/SIMULINK. It is shown that PV system
output power increases with rise in solar irradiance and fall in cell temperature. Therefore, solar
cell performance better in winter season than summer. The P&O gives the optimum duty cycle as
compare to Constant duty cycle control, to extract the maximum power from PV system.
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