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 energy meter to the easy recharge unit and hence converts it into a prepaid energy meter.
By using this technology, we will be able to minimize the losses occurred by corrupt employees.
This also helps in the protection of Over Voltage

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

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

7. Components
ARM9TDMI
ARM7 LPC248
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:
Electronic meter
Electromechanical meter
Electromechanical induction meter operates by counting the revolutions of aluminum disc which is made to rotate at a speed proportional to the power.

9. ARM7 & ARM9 ARM7 ARM9 Von neumann architecture. Harvard architecture,
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
LED blink receives train of pulses applied to interupt pin of ARM7
Electronic meter consists of LED,which blinks according to power consumption.
If Power consumption is more LED blinks faster & Over Voltage is Detected.

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

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

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, Automatic Power Meter Reading system using GSM Network. The 8th International Power Engineering Conference, pp:
Md. Wasi-ur-Rahman, Mohammad Tanvir Rahman,Tareq Hasan Khan and S.M. Lutful Kabir Design of an Intelligent SMS Based Remote Metering System. IEEE International Conference on Information and Automation, pp:
Kwang-il Hawang Fault Tolerant GSM based Remote Meter Reading Infrastructure. Journal of International Processing Systems. Vol:5, No 4, pp:
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

21. Thank You
Any Queries ?