MPPT Solar Charge Controller

Advance Solar charge controller with lot of benefits. An advantage over common PWM Solar charge controller. Double Boost Technique is used to get a desired output.

1. Minor Project Presentation
MPPTSolar Charge
Controller
By
Shashank Narayan
07820902812
ECE-7
th
Sem

2. Objective
Thesolarchargecontrollerisastand-aloneoff-the-gridphotovoltaic(PV)
systemthatutilizesmaximumpowerpointtracking(MPPT)toobtainthemost
efficiency.Duetotheinherentlossesthatoccurinphotovoltaicsystems,itis
essentialthatthemaximumpowershouldbeextracted.
Theintentistocreateanextremelyefficientchargecontrollerthatwouldbe
abletomonitorthepowergeneratedbythephotovoltaicarrayanddeliverthe
maximumamounttothebatterybankduringvaryingatmosphericconditions.
TheSystemiscompatibletodrive500WattageAC–DCdevicesincluding
chargingofbatteries.
AdvanceControllermakeitanefficientsystem.

3. Basic Functions
Automatic battery charging control
Prevents Battery overcharging
Blocks Reverse current
Provide constant voltage
Overcome whether conditions
Maximum power tracking

4. Applications
TheControllercanbeusedaspowersourcetodriveany
AC/DC500wattagesystemorequipments.
MicrocontrollerbasedMPPTalgorithmisusedto
extractthemaximumpowerfromPVcells.
Canbeusedforbatterychargingoraportablecharging
source.
Userfriendlyandalowcostsystem.

5. Block Diagram

6. DC-DC Conversion Unit
As shown two BOOST Convertor are used in series to get the desired
DC output.
Boost Convertor–I is used to boost the low voltage input DC from the
panel.
Boost Convertor–II is used to boost the total incoming DC voltage from
Boost Convertor–I & high voltage from PV cell.

7. Basic Boost Converter
Circuit is operated by Switch Mosfet.

8. Continue..
When Switch is on, Inductor stores the energy.

9. Continue..
When MOSFETis off, circuit operation starts and at
the output we get V
in+ V
L(Boosted DC voltage)

10. DC-AC Conversion Unit
This is one of the advantage of my controller.
Basic aim to insert DC-AC convertor or we can say
an inverter is to make the controller an portable AC
power source for driving the AC equipments
anywhere.
The power inverter converts DC voltage into 220V ac
voltage and can drive AC load of 500W.

11. Control Unit

12. Microcontroller Overview
Used ARM7 microcontroller which is a 32bit
microcontroller.
It has two ADC ports of 10bit.
AD.0 has 6 channels
AD.1 has 8 channels.

13. Circuit Specifications
Inverter –
12-18V DC input
220V/50-60hz output
Boost convertor –
12-18 V DC input.
16-20 A current input.