Modeling of Grid connected PV System by using Matlab/Simulink

1. SAI VINAY GUPTHA – 15C11A0256
SAKETH MAGI - 15C11A0257
BALA RAJU - 15C11A0209
JAYAKRISHNA - 15C11A0219
Guide:
T.RaghuM.Tech(PhD)
Associate Professor

2. Model of a
Single-Phase
Grid-Connected
Photovoltaic System
Using
MATLAB/SIMULINK

3. Abstract
Model of a single phase grid-connected photovoltaic (PV)
system with associated controllers is presented. For better
analysis of Performance of this System, A simulation model
is developed in MATLAB/SIMULINK tool. The main
component of the single phase grid-connected PV system
are, a PV array, a dc-dc boost converter, a PWM based
voltage source inverter and filter. For high efficiency of the
PV system used maximum power point tracking (MPPT)
algorithm. Simulation studies shows that the sun irradiance
are increase so increase the PV array output power and
also increase the PQ.

4. Objective
The Main Objective of this project is
to study the performance of a Single-
phase Grid-Connected photovoltaic
System Model.

5. Introduction:
Solar PV systems are generally
classified into Grid-connected and
Stand-alone systems.
 In grid-connected PV systems Power
conditioning unit (PCU) converts the DC
power produced by the PV array into AC
power and supplies the power to the
utility grid.

6. Our Project Involve
Model of PV cell
Model of DC-DC Converter
Model of PWM Inverter
Model MPPT Controller

7. Components involved
The Main Parts of the Grid-Connected
PV System are
1.PhotoVoltaic Array
2.DC-DC boost converter
3.PWM Inverter
4.MPPT controller

8. Photovoltaic Array:
A PhotoVoltaic Array is a collection of PV cells.
PV cells convert the Solar energy into
Electricity by using the PhotoVoltaic
Phenomenon.

9. Performance Curves of PV Array
Power-Voltage Curve of PV Array

10. Current-Voltage Curve of PV Array

11. Advantages of PV Array
 Eco-friendly and
Environment-friendly Energy
Infinite Source of Energy
Long Life and Good
Durability

12. DC-DC Boost Converter:
A DC-to-DC
converter is an
electronic circuit that
converts a source
of direct current (DC)
from one voltage level
to another.

13. PWM Inverter:
A PWM inverter is a
circuit which
converts a dc power
into an ac power at
desired output
voltage and
frequency by
varying the Duty
Cycle.

14. MPPT Controller:
MPPT or Maximum Power Point Tracking is an
algorithm that is used for extracting maximum
available power from PV module under certain
conditions. The point at which PV module can
produce maximum power is called 'maximum
power point' (or peak power voltage).

15. Advantages of MPPT Controller:
Gives Maximum Efficiency.
Sustained system, no
frequent collapse of PV
power.
Increased running time.

16. Existing System

17. Proposed System Model

18. Proposed System Block Diagram

19. Working:
 The Solar radiation is converted into Electricity by the PV
cell.
This Electricity is stepped up by the DC-DC Boost
Converter.
Output of the Converter is then converted in to AC by
the PWM Converter.
PWM converter output is sent to low pass filter to
remove the Harmonic contents in the output.
The Filtered Output is directly fed to the Utility Grid .
Along with this an Closed loop Control is Employed for
the optimum Operation of the system.

20. Thank You