The document discusses a GSM-based prepaid electricity meter, highlighting issues with standalone electric meters and key components such as microcontrollers and circuit diagrams. It addresses advantages and disadvantages, including the necessity for staffing and challenges in billing and energy recovery. The document also notes that although transitioning from postpaid to prepaid systems is difficult, it is more feasible in new developments and requires collaboration with regulators.

1. GSM BASED
PREPAID
ELECTRICITY
METER

2. 1. AVIK KR. KUNDU (ROLL NO.-14)
2. ARINDAM KANODIA(ROLL NO.-10)
3. ARKO DAS(ROLL NO.-12)
4. PRITAM SAMANTA(ROLL NO.-36)

3.  ISSUES WITH STAND ALONE ELECTRIC METER.
 COMMON FEATURES OF PREPAID ELECTRIC METER.
 PRINCIPLE OF OPERATION.
 COMPONENTS OF PREPAID ELECTRIC METER.
 CIRCUIT DIAGRAM.
 MEASURES AGAINST ELECTRICITY THEFT
 ADVANTAGES AND DIS-ADVANTAGES
 FUTURE SCOPE

4.  REQUIRES HUGE MAN POWER.
 BILLING PROCESS REQUIRES EXCESSIVE TIME.
 VERY LITTLE OR NO PREVENTION FOR THE TAMPERING OF
SUPPLY LINES
 DUE TO POSTPAID BILLING SYSTEM, A LARGE NUMBER OF
STATES ARE NOT EVEN ABLE TO RECOVER 90% OF THE ENERGY
BILLED BY THEM.

5. GRAPH OF COLLECTION EFFICIENCY
BY DIFFERENT STATES

6. 1. RECHARGE
2. CONNECT-DISCONNECT
3. IN HOUSE DISPLAY UNIT
4. COST EFFECTIVE
5 .TARIFF REVISION
6. EXTRA CREDIT LIMIT

7. PRINCIPLE OF OPERATION

8. 1. AT89S52
2. 16*2 LCD
3. ULN2003
4. AT2402
5. DIGITAL ENERGY METER
6. RELAY
7. BUZZER
8. GSM MODEM

9. FEATURES:
A. IT BELONGS TO ATMEGA FAMILY OF MICROCONTROLLERS.
B. 8K FLASH MEMORY ROM AND 256K RAM.
C. IT HAS 40 PINS.
D. ONLY PIN NO'S 12,31,40,34-39,22,21,25,28 ARE USED FOR OUR
PURPOSE.
E. 4.0V TO 5.5V OPERATING VOLTAGE RANGE
F. IT OPERATES AT 33KHZ FREQUENCY.
G. 32 I/O LINES.

10. PIN DIAGRAM OF AT89S52

11. FEATURES:
A. 16*2 LCD DISPLAY HAS TWO ROW SCREEN AND EACH ROW
DISPLAYS 16 DIGIT AT A TIME.
B. IT CONSISTS OF SEVEN INDEPENDENT DARLINGTON
CONNECTION.

12. FEATURES:
A. IT CONSISTS OF SEVEN INDEPENDENT DARLINGTON
CONNECTION.
B. IT IS USED TO RUN A HIGH VOLTAGE/CURRENT
PERIPHERAL CIRCUITS.
C. WHEN INPUT TERMINAL IS HIGH IT OFFERS LOW
IMPEDANCE PATH OTHER WISE IT OFFERS A HIGH
IMPEDANCE
D. IT ACTS AS A CURRENT AMPLIFIER CIRCUIT.

13. ULN2003
INTERNAL VIEW WORKING

14. FEATURES:
A. CHIP IS USED TO READ DATA FROM EEPROM
THROUGH CARD READER.
B. STANDARD VOLTAGE OPERATION VCC 2.7-5.5V
C. SELF-TIMED WRITE CYCLE(5MS MAX)
D. BI DIRECTIONAL DATA TRANSFER PROTOCOL
E. ALL THE DATA ARE TRANSMITTED SERIALLY IN 8
BIT WORDS.

15. PIN DIAGRAM OF AT24C02

16. PARTS:
A. ADE7757.
B. 7805 (VOLTAGE REGULATOR)
C. MCT2E (OPTO COUPLER)

17. FEATURES:
A. On-Chip Oscillator as Clock Source.
B. . On-Chip Creep Protection (No Load Threshold)
C. On-Chip SUPPLY MONITORING
D. AC Input Only

18. CIRCUIT AND PIN DIAGRAM

19. C.MCT2E(OPTO COUPLER)

20. RELAY CONTROL UNIT

21. FEATURES:
A. DUAL BAND OR TRIBAND GSM GPRS MODEM (EGSM
900/1800MHZ) / (EGSM 900/1800 / 1900 MHZ )
B. INTERFACES VIA RS-232 THROUGH D-TYPE 9 PIN CONNECTOR.
C. POWER SUPPLY THROUGH MOLEX 4 PIN CONNECTOR
D. SMA ANTENNA CONNECTOR

22. GSM MODEM CONSTRUCTION

23. GSM COMMUNICATION SYSTEM

24. CIRCUIT DIAGRAM OF PREPAID
ELECTRICITY METER

25. SERVER’S END CONNECTION FLOWCHART:

26. CUSTOMER’S END CONNECTION FLOWCHART:

27. A. PROTECTION AGAINST SHORTING THE PHASE LINE AND
DISCONNECTING THE NEUTRAL LINE .
B. PROTECTION AGAINST WHOLE METER BYPASSING .
C. CONTROL OF ELECTRICITY THEFT USING OBSERVER
METER .
D. PROTECTION AGAINST TAMPERING .

28. A. NO DEPOSIT
B. NO ID OR CREDIT CHECK
C. NO TERMINATION FEES; NO LATE FEES
D. MULTIPLE PAYMENT OPTIONS
E. LOW MONTHLY RATES
F. LOW KWH RATE
G. CUSTOMER HAS A VERY GOOD IDEA OF HOW MUCH
MONTHLY BILLS WILL BE GOING FORWARD

29. A. THEY CAN BE INCONVENIENT BECAUSE YOU HAVE TO GO OUT
TO A SERVICE CENTER TO PURCHASE A TOKEN.
B. WITH THE PREPAID, YOUR ELECTRICITY IS DISCONNECTED
AS SOON AS YOUR UNITS GET FINISHED WHILE WITH THE POST-
PAID SYSTEM, YOU CAN PAY YOUR BILLS IN BITS WITHOUT BEING
DISCONNECTED
C. IF YOU CAN’T REACH A SHOP TO TOP UP YOUR METER YOUR
ELECTRICITY WILL BE OFF UNTIL YOU GET ACCESS TO A SERVICE
CENTER.

30. A. Madhya Gujarat Vij Company Ltd. – Gujarat .
B. Maharashtra State Electricity Distribution Company Ltd.
(MSEDCL) – Maharashtra .
C. West Bengal State Electricity Distribution Company Ltd. –
West Bengal .
D. New Delhi power limited-New Delhi.

31. Though converting existing post paid electricity
users to prepaid has proven more difficult, it is much
easier to implement Prepaid Electricity in new green
field projects such as new real estate developments,
townships, industrial / commercial areas & non
electrified areas. Often Utilities work with regulators
& governments to obtain support for prepaid
deployments, as it can involve disconnection of
services on reaching zero balance

32. CONCLUSION

33. THANK YOU