mppt new edit

8/3/2019 Mppt New Edit

1/27

MAXIMUM POWER POINTTRACKER BASED CHARGEDCONTROLLER

Presented ByMuhammad Ali Aziz- IS/22555/Aut/M-08

Project Supervisor:Asad Jamal

External SupervisorHuq Bob (Project director NIE)


2/27

Outline of Presentation Overview Deliverable

Literature Review Methodology Implementation Tools Working Model

Implementation Phases Results & Discussion Proposed Future Work and conclusion References


3/27

Contents

Solar Panel

Charge Controller and Battery

Inverter

AC Load


4/27

Overview

To identify how to get the maximum power out of asolar panel.

To determine the maximum level at which batterywill charged by using maximum power pointtracker.

To increase the efficiency of solar system andabsorb maximum power to the PV array.


5/27

Projected By Pakistan Engineering Council Project.


6/27

Sponsored By

National Institute of Electronics (NIE)


7/27

What is MPPT?

Solar arrays have a power curve with amaximum power point and the devicethat sets this point is called a MaximumPower Point Tracker


8/27

Working Model


9/27

MPPT Working

MPPT checks output of PV module.

Compare O/P of PV module with battery voltage.

Fix the voltage at which PV module give the

maximum power.


10/27

What is maximum power

point tracking?

Maximum Power Point Tracking is

electronic tracking system notmechanical system.

The charge controller looks at the

output of the panels, and compares itto the battery voltage..


11/27

Cont ...

The best power that the panel can put

out to charge the battery. It takes thisand converts it to best voltage to getmaximum AMPS into the battery.


12/27

Solar Charge Controller

MPPT solar charge controller is used to correct for detectingthe variations in the current-voltage characteristics of solarcell and shown by I-V curve.

It forces PV module to operate at voltage close to maximumpower point to draw maximum available power.

MPPT solar charge controller allows users to use PV module

with a higher voltage output than operating voltage of batterysystem.


13/27

How Maximum PowerPoint Tracking works

Assume your battery is low, at 12 volts.A MPPT takes that 17.6 volts at 7.4

amps and converts it down, so thatwhat the battery gets is now 10.8 ampsat 12 volts. Now you still have almost

130 watts.


14/27


15/27

Series: Volts increase,

Amp-hours remain thesame

Parallel:Volts remainthe same and the

Amp-hours increase!


16/27

Cont

This allows you to

configure how many

volts, at how many

amp-hours your need.


17/27

MPPT vs PWM Controllers

MPPT is much,

much better at

maintaining

battery life thanPWM controllers,

and more costly!


18/27

Ideal Conditions for MPPT

Cold weather, cloudy or hazy days: Normally,

PV module works better at cold temperaturesand MPPT is utilized to extract maximumpower available for them.

When battery is deeply discharged: MPPT can

extract more current and charge the battery ifthe state of charge in the battery is lowers.


19/27

Adv of Solar Charge Controller

Reduces complexity of system

Output of system is high efficiency

PV output power is used to control DC-DC converter directly.

MPPT solar charge controller can be applied to other renewableenergy sources such as small water turbines, wind-power turbines,

etc.


20/27

Deliverables

Hardware will have Ability to Recover Lost BatteryCapacity, Increase Battery Charge Acceptance.

An LCD continuously displays the percentage of dutycycle and battery charge level.

The output of PV array is DC source then we convertit in to AC.


21/27

Literature Review

Wikipedia.org MPPT charge controller, current control and switching logic (PDF

125p).

Hart, Daniel W., Introduction to Power Electronics, Prentice Hall,Upper Saddle River, N.J.

Inverter Design Shines in Photovoltaic Systems By Eric Zhang,Senior Technical Marketing Engineer, Fairchild Semiconductor,Shanghai, China.

Solar panels introduction http://poweredbysolarpanels.com/.

Basic Tutorials: Charge Controllers for Solar Energy Systemshttp://www.freesunpower.com/chargecontrollers.php


22/27

Methodology

MPPT (Maximum Power Point Tracker )TECHNIQUE

MPPT (Maximum Power Point Tracker ) is a latest

technology to get maximum power on PV (photovoltic) array.

Pulse Width Modulation is a modulation technique in whichvariable width pulses are generated to represent the amplitudeof an analog input signal


23/27

Block diagram


24/27

MPPT BLOCKDIAGRAM


25/27

Implementation Tools

MPPT charge controller

PIC18F4520

OS Platform = Windows


26/27

Implementation Phases

Phase1 Theoretical Analysis

Maximum power point tracker Design

Phase2 PIC Architecture & C Programming

PWM Algorithm & Battery Charging Control

Components Purchasing & Hardware Designing

OR-CAD & PCB Designing


27/27

References

MPPT charge controller, current control andswitching logic (PDF 125p).

Hart, Daniel W., Introduction to Power Electronics,Prentice Hall, Upper Saddle River, N.J.

Inverter Design Shines in Photovoltaic Systems ByEric Zhang, Senior Technical Marketing Engineer,Fairchild Semiconductor, Shanghai, China.

Solar panels introduction

http://poweredbysolarpanels.com/. Basic Tutorials: Charge Controllers for Solar Energy

Systemshttp://www.freesunpower.com/chargecontrollers.ph

p

mppt new edit

Documents