This document describes a proposed prepaid remote energy meter system that uses GSM technology. An energy meter would be interfaced with an easy recharge unit to convert it into a prepaid meter. This would minimize losses from corrupt employees and help protect against overvoltage. The system uses ARM7 and ARM9 microcontrollers connected via GSM modem to a mobile network. When units are consumed, the meter sends updates via SMS. When credit runs out, the connected devices would switch off and an alert SMS is sent. This prepaid remote system allows for better monitoring and control of electricity usage.

1. GSM Based Prepaid
Remote Energy Meter &
OverVoltage Protection
Presented By:-
L.Pringil
10AM1A0476

2. Introduction
• What is Energy Meter?
• What is Prepaid remote Energy meter?
• How Over Voltage is protected and detected ?

3. PROBLEM STATEMENT
• Electricity demand is on the increase. As
population increases, comes more demand for
electricity supply/consumption. Demand per
capita is increasing due to large no. of gadgets
in use. Demand from developing countries is
also on the rise.
• “How can we manage customer consumption
of electricity in response to supply condition,
for example having electricity customers
reduce their consumption at critical times"

4. BRIEFING
• We will interface digital energyWe will interface digital energy
meter to the easy recharge unit andmeter to the easy recharge unit and
hence converts it into a prepaidhence converts it into a prepaid
energy meter.energy meter.
• By using this technology, we willBy using this technology, we will
be able to minimize the lossesbe able to minimize the losses
occurred by corrupt employees.occurred by corrupt employees.
• This also helps in the protection of
Over Voltage

5. PASTPAST
ELECTRO-MECHANICAL
Low Accuracy
Control – NIL
Communications - Expensive
Theft Detection – Poor
ELECTRO-MECHANICAL
Low Accuracy
Control – NIL
Communications - Expensive
Theft Detection – Poor
PRESENTPRESENT
DIGITAL SOLID STATE
High Accuracy
Control – LIMITED
Communications – External through Retrofit
Theft Detection – Node only
DIGITAL SOLID STATE
High Accuracy
Control – LIMITED
Communications – External through Retrofit
Theft Detection – Node only
NEXTGENNEXTGEN
REMOTE PREPAID ENERGY METERS
Very High Accuracy
Control – FULL
Communications – Built in (on chip / PCB)
Theft Detection – High (Network level)
REMOTE PREPAID ENERGY METERS
Very High Accuracy
Control – FULL
Communications – Built in (on chip / PCB)
Theft Detection – High (Network level)
History Of METERING SYSTEM

6. Block Diagram Diagram
Power Station
load 220-230v AC
Relay
ONOFF
Energy Meter
Load
Counter
Unit
Recharging
Section
Mobile
GSM
Modem
Power
Supply
ARM7
LPC2148
Power Supply
Reset
Buzzer
ARM9
3.3V
12V
12V

7. Components
ARM7 LPC248ARM9TDMI
Energy meter GSM modem

8. Energy Meter
Energy meter is a device that measures the amount
of electrical energy is consumed.
The meters fall into two categories:
Electromechanical induction meter operates by
counting the revolutions of aluminum disc which is
made to rotate at a speed proportional to the power.
Electromechanical meter Electronic meter

9. ARM7 & ARM9
ARM7 ARM9
Von neumann architecture. Harvard architecture,
32 bit RISC micro controller.
32 bit RISC micro controller.
3 stage pipeline. 5 stage pipeline.
Single memory for Data and
Instructions.
Seperate instruction and Data
for memory interface.

10. GSM Modem
• A GSM modem is one of the wireless modem that is
devised to work with a GSM wireless network.
• Used for text Sending and Receving.
• Support wide range of frequencies (from 850 MHZ to
1900 MHZ for different classification of GSM
networks).
• In this we use
SIM 300 mini GSM module
for communication.

11. Over voltage Detection
Electronic meter consists
of LED,which blinks
according to power
consumption.
If Power consumption is
more LED blinks faster &
Over Voltage is Detected.
LED blink receives train of
pulses applied to interupt pin
of ARM7

12. How Energy Meter is Interfaced
House
Electricity
Board OfficeGSM Modem
Energy
Meter
ARM7
GSM
network
GSM Modem
ARM7 & Energy meter Is interface with GSM
Network.
GSM Modem is Present at Office & at consumer
side.

13. GSM Initialization
 GSM sends notification to
authenticated number through
SMS.
Initialization Of GSM

14. System Implementation
 Authorized number sends SMS to GSM Modem an
interrupt signal is occured.
ARM7 reads the pulse and sends status of pulse and
units.

15. ARM9 Screen Display
• Once recharge is
done units are
displayed on ARM9
• We can know
consumed units
through SMS by
giving missed to
GSM Modem

16. If Recharged Units are Consumed
The devices will be
SWITCHED OFF and
displayed on ARM9.
Alert message is send
to authenticated number

17. Advantages

18. Disadvantages
• Billing system fails if no GSM
network coverage.
• Charges may be applicable for
network use.
• Requries fixed GSM number.

19. CONCLUSION
• This pre-paid remote energy meter proves to
be a boon in the power sector.
• Control the usage of electricity on consumer
side to avoid wastage of power.
• Helps to the country revenue by stopping
current theft and punishing the dishonest
customers.

20. References
H.G.Rodney, Tan IEEE, C.H.Lee and V.H.Mok, 2007. Automatic Power
Meter Reading system using GSM Network. The 8th International Power
Engineering Conference, pp: 465-469.
Md. Wasi-ur-Rahman, Mohammad Tanvir Rahman,Tareq Hasan Khan and
S.M. Lutful Kabir 2009. Design of an Intelligent SMS Based Remote
Metering System. IEEE International Conference on Information and
Automation, pp: 1040-1043.
Kwang-il Hawang 2009. Fault Tolerant GSM based Remote Meter
Reading Infrastructure. Journal of International Processing Systems. Vol:5,
No 4, pp:221-228.
http://probots.co.in/Manuals/SIM300.pdf
Richa Shrivastava, Nipun Kumar Mishra, “An embedded system for
wireless prepaid billing of digital energy meter” , International Journal of
Advances in Electronics Engineering Vol1 No.1,pp.322-324.

21. Thank You
Any Queries ?