SOLAR ELECTRIC CHARGE CONTROLLER AND

PORTABLE POWER SUPPLY

Presented By: Y. Madhu Sudhan Reddy Y. Venkateswara Reddy Y. Sreenivasulu

Project Guide: S. Vijaya Kumar

Hardware

components

Abstract

Introduction

Block

diagram

Solar panel

Boost

converter

A/D

converter

8051 micro

controller

CONTENT:

RPS

Schematic

diagram

Advantages

Disadvantages

Results

Conclusion

Future scope

Bibliography

Hardware Components:

Solar panel

Boost converter

A/D (analog to digital) converter

8051 MC (Micro controller)

LCD display

Relay

RPS (Regulated power supply)

ABSTRACT:

Our project is a device that will allow a solar

panel to efficiently recharge a DC battery.

The controller will vary the voltage across the

panel to find and maintain the maximum power

point.

By monitors the battery voltage level and

charges the battery using pulse width modulation

techniques.

By using the Boost converters to increasing the

solar panel output voltage because of the at any

system we use the some rated voltages.

INTRODUCTION:

The PV string converters which converts solar

radiation in to dc power.

Many types of photovoltaic (PV) power

conversion systems have been developed

including the grid-connected system for reducing

the power from the utility.

BLOCK DIAGRAM:

Here we are using two power supply's. One is the A.C supply and

another one is the d.c supply.

A.C supply - RPS (Regulated Power Supply)

D.C supply (solar o/p power):- Boost converter

SOLAR PANEL:

It is also called as photovoltaic cell. Here we are

using flat type solar panel.

28 cells are used in this flat type solar panel.

Total cells are dividing in to four groups.

Each group we conceder 7 cells by connecting in

series it gives the total voltage as 2.4V & Four

groups are connected in parallel.

Each cell as produced the voltage is 0.35V but

naturally, as for the design and using the different

type of metals solar cell produced the voltage in

b/w 0.35V to 0.5V.

Solar cells are connected in series – increasing

voltage.

Solar cells are connected in parallel – increasing

current.

BOOST CONVERTER:

It is also known as a step up converter, that

means the output voltage is grated than the

source voltage

Switch is closed – current flow is +ve – L – S – -ve

& L – Charging

inductor current ΔIL = (VS / L) * (DT)

Switch is opened – current flow is +ve – L – D – R & C – -ve & L-Discharge.

inductor current ΔIL = (VS - Vo/ L) * (1-D)T

A/D (Analog To Digital) Converter:

Real-world signals must be converted into digital,

using a circuit called ADC (Analog-to-Digital

Converter), before they can be manipulated by

digital equipment.

The frequency on which the sampling will occur is

called sampling rate.

If a sampling rate of 22,050 Hz is used, for

example, this means that in one second 22,050

points will be sampled. Thus, the distance of each

sampling point will be of 1 / 22,050 second (45.35

µs, in this case).

If a sampling rate of 44,100 Hz is used, it means

that 44,100 points will be captured per second. In

this case the distance of each point will be of 1 /

44,100 second or 22.675 µs.

8051 MICRO CONTROLLER:

The generic 8051 architecture supports a Harvard

architecture.

Optimized 8 bit CPU for control applications and

extensive Boolean processing capabilities.

64K Program Memory address space & 64K Data

Memory address space.

128 bytes of on chip Data Memory.

32 Bi-directional and individually addressable I/O

lines.

Two 16 bit timer/counters.

On chip clock oscillator.

RPS (Regulated power supply):

As for the operation the RPS can be classified in

to four parts, they are

1. Transformer

2. Bridge Rectifier

3. Smoothing Capacitor

4. Voltage regulator

SCHEMATIC DIAGRAM:

ADVANTAGES:

Increasing the life time of battery.

Clean, no Noise.

Controlling is simple.

Free.

Any place we can implement for charging

purpose as you can change the rated value of

system.

DISADVANTAGES:

Initial cost is more

It work at only morning sections other

wise it not work

Interconnect costs

Size

RESULTS:

1. Output is less than the 3.7V (Disconnected):

2. Output is in b/w 3.7V to 4.7V (charging mode)

3. Output is greater than the 4.7V (Disconnected):

CONCLUSION:

The solar electric charge controller

regulates the power. Portable power supply it

supplies the power accordingly. It automatically

disconnect the charging system when it get the

high or lower of rated power (rated power rage in

between 3.7V to 4.7V). When the range of power

at rated power at that time it conducts the

charging.

FUTURE SCOPE:

High rated solar power generation

station can also implement this system because

the rated power can modify in this system

accordingly. We can increase the rated power

more than 4.7V.

BIBLIOGRAPHY:

The 8051 Micro controller and Embedded

Systems - Muhammad Ali Mazidi, Janice Gillispie

Mazidi

The 8051 Micro controller Architecture,

Programming & Applications – Kenneth, J.Ayala

Power electronics and drives by M.D Rashid

Linear integrated analysis by ray chowdary

Queries ?

Thank you …