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DESIGN, IMPLEMENTATION AND PERFORMANCE TEST OF A PREPAID ENERGY METER.

Submitted by:Md.Chand Siddique (ET-111102)

Md.Saimun Sarif (ET-111018)

Department of Electrical and Electronic EngineeringInternational Islamic University Chittagong

June 2015

Under the supervision ofEngr. Shafait Ahmed.Lecturer EEE,IIUC

Design, implementation and performance test of a prepaid energy meter

Project Outlines

IntroductionMotivationObjectiveHistory of metering systemWhy prepaid energy meter- from customer point of view?Block DiagramProject ToolsCircuit DiagramFull device overviewPractical data for prepaid energy meterLimitationsFuture scopeconclusion

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Design, implementation and performance test of a prepaid energy meter

Introduction

Prepaid energy meter which is based on the concept “Pay first and then use it”.

Prepaid energy meter also reduces the error made by humans while taking readings to a large extent and there is no need to take reading in it.

The prepaid energy meter uses a recharge card which is available in the prepayment electricity vending station.

In our project we are using keypad through which we can done our recharge.

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Design, implementation and performance test of a prepaid energy meter

Motivation

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Eliminate the billing delay.

The prepaid energy meter save the man power.

Save electrical power.

Save our money and time.

Design, implementation and performance test of a prepaid energy meter

Objectives

The main objective of our project is to minimise the cost of our

project which we design.

To overcome the problems or error in meter reading.

To overcome in the problems of traditional billing systems this

project is designed.

To reduce the loss of power and revenue.

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Design, implementation and performance test of a prepaid energy meter

History of metering system

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PAST

ELECTRO-MECHANICALLow AccuracyControl – NILCommunications – Unidirectional Theft Detection – Poor

PRESENT

DIGITAL SOLID STATEHigh Accuracy Control – LIMITEDCommunications – UnidirectionalTheft Detection – Low

Next gener.

PREPAID ENERGY METERVery High AccuracyControl – FULLCommunications – BidirectionalTheft Detection – High

Design, implementation and performance test of a prepaid energy meter

Why Prepaid energy meter – From Customer point of view?

Pay to suit your income status.

Reduce waste – conserve energy

No billing errors

No unacceptable disconnections. etc

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Design, implementation and performance test of a prepaid energy meter

Block Diagram

Microcontroller

Voltage and current

controlling unit

keypadRelay

Buzzer

LCD display

Figure:1 Block Diagram of a prepaid energy meter.

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Main supply

Design, implementation and performance test of a prepaid energy meter

Project ToolsTransformer(220/6V)Relay (12v)Capacitor(1000µf to 220 and 330µf to 100µf)LCD (2×16)Key pad(3×4 matrix)Crystal oscillatorDiodeTransistor (NPN)C828Microcontroller(MCU PIC16F876A)BuzzerVaro boardVariable Resistor(4.7kohm)Plastic wood sheet200W bulb

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Design, implementation and performance test of a prepaid energy meter

Full Device Overview

Load LCD

Relay

Buzzer

Keypad

Load switch

PIC16F876A

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Design, implementation and performance test of a prepaid energy meter

Practical data for prepaid energy meter

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No.of

observ-

ation

Load

(watt)

Amount

recharge

(tk)

Unit

taken

Time

(mint)

Line

voltage

(v)

Line

current

(A)

Power used

(Wh)

1 60 200tk 40 25.11 228 0.22 50.16

2 100 200tk 40 14.54 229 0.37 84.73

3 120 200tk 40 12.25 225 0.45 101.2

4 160 200tk 40 9.17 226 0.60 135.6

5 200 200tk 40 7.20 225 0.74 166.5

Design, implementation and performance test of a prepaid energy meter

Chart of practical data

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1 2 3 4 50

50

100

150

200

250

60

100

120

160

200

50.16

84.73101.2

135.6

166.5

9.84 15.27 18.8 24.433.5

Chart for practical data

LOAD CONSUMED POWER POWER LOSS

Design, implementation and performance test of a prepaid energy meter

Future Scope

A mini printer can be interfaced to get a printed bill or details of billing.

Remote recharging can be implemented through telephone line or wireless network.

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Design, implementation and performance test of a prepaid energy meter

Limitations

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Because of experimental design our device is not suitable for practical use

now.

Lack of emergency balance.

Limitation of load.

Design, implementation and performance test of a prepaid energy meter

ConclusionIn this our report it is intended to present an overview of prepaid energy meter,

which can control the usage of electricity on consumer side to avoid wastage of power.

Prepaid energy meter is a concept to minimize the Electricity theft with a cost efficient manner.

In Bangladesh and other Asian country peoples are using more post-paid energy meter so here we are courage to peoples about the prepaid energy meter.

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Design, implementation and performance test of a prepaid energy meter

THANKS TO ALL

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