GUIDED BY: Mrs. S.SUJA M.E., EEE DEPT., CIT BY D.RAGUBALAN 07MER06 EMBEDDED AND REAL TIME SYSTEMS(EEE) POWER LINE communication BASED POWER THEFT DETECTION SYSTEM
GUIDED BY: Mrs. S.SUJA M.E.,
EEE DEPT.,CIT
BYD.RAGUBALAN07MER06EMBEDDED AND REAL
TIME SYSTEMS(EEE)
POWER LINE communication BASED POWER THEFT DETECTION SYSTEM
POWER THEFT IN INDIA
Introduction Hooks & cables Power theft & IndiaUtility metersMonitoring systemUse of PLC in
monitoring systemEnd of the power theft
OVER VIEW
The objective of the project is to identify methods for detecting power theft.
The power theft is to be i. detected, ii.located and
iii. communicated to the authorities.
Parameters of power delivery includes power line current, power line voltage and network load distribution.
DIAGRAM FOR POWER THEFT DETECTION SYSTEM
PORTION OF POWER STSTEM
(POWER LINE)
USER DEVICE
SE
NS
OR
POWER LINE
MODEM
COMPUTER
MODEM
BLOCK DIAGRAM
Consumer premises
EB premises
BLOCK DIAGRAM FOR CONSUMER PREMISES
CIRCUIT DIAGRAM FOR CONSUMER PREMISES
BLOCK DIAGRAM OF EB PREMISES
CIRCUIT DIAGRAM OF EB PREMISES
POWER LINE COMMUNICATION(PLC)
PLC is a kind of communication technology, which uses Medium Voltage(MV) & Low Voltage(LV) distribution network as the communication media to implement transmission of data, voice and real time image.
The components involved in PLC are the
Power Line Carrier Unit – provide signal transmission and reception
Coupler – for “clamping” around a live wire thus injecting the communication signals into the power line.
PLC modem
The monitoring system mainly has the following
functions:
1.Remote meter-reading
2.Data acquisition
3.Thread loss
4.Real-time Monitoring and trip-off( required system)
PLC TRANSMISSION
PLC transmissions are synchronized to the zero crossing point of the AC power line. It should be transmitted as close to the zero crossing point i.e. within 200 μs.
square wave with a max Delay of 100 μs from the zero crossing point
The maximum delay between signal envelope input and 120KHz output bursts is 50 μs.
Therefore, it should be arranged that outputs to the within
50 μs.
PLC TRANSMISSION
1 2
50
50
CODE TRANSMISSION
A Binary 1 is represented by a 1 ms burst of 120 KHz the zero crossing point and a Binary 0 by the absence of
120 KHz.
Therefore only the 1 ms "envelope" need be applied to their inputs.
These 1 millisecond bursts should actually be transmitted three times to coincide with the zero crossing points of all three phases in a three phase distribution system.
CODE TRANSMISSION
wave
CODE TRANSMISSION
A complete code transmission encompasses eleven cycles of the power line.
The first two cycles represent a Start Code. The next four cycles represent the House Code and the last five cycles represent either a Number Code or a Function Code.
This complete block, (Start Code, House Code, and Key Code) should always be transmitted in groups of 2 with 3 power line cycles between each group of 2 codes.
WAVEFORM GENERATION
230V 50Hz
Operation of the project
Consumer premises EB premises
Results
Under power theft, the relay is switched off isolating the area of power theft from the EB side .
LCD display also indicates power theft.
The system functions with real-time monitoring users and burden forecast, which uses MV&LV PLC as its transmission media.
The system is integrated with power management and burden control.
CONCLUSIONS
REFERENCES
[1]Icahn and J.K.Hwang, “A power line based sensor network for protective electrical fire precaution and early discovery,” IEEE trans. power delivery, vol 23.,No.2.,April2008.
[2]Daver, Sr.J. Brian,and Radtke , O.Wiilam. “power theft detection system”, WIPO trans .,WO 2008/057808., 15 MAY 2008.
[3]MIN Tao, "Joint Schemes of Electricity Energy Metering System and Their Implementation", Power System Technology, August 2003, pp.59-63.
REFERENCES[4]L. T. Tang, “Development of a high-speed power line
communication system,” Master’s thesis, Nanyang Technol. Un
[5]D. K. Cheng, Fundamental of Engineering Electromagnetics. Reading, MA: Addison-Wesleyiv., Singapore, 2001.
[6]J. Dickinson and P. J. Nicholson, “Calculating the high frequency transmission line parameters of power cables,” in Proc. 1st Int. Symp. Power-Line Communications and its Applications (ISPLC 97), Apr.1997, pp. 127–133.
CONFERENCE
“POWER LINE COMMUNICATION BASED POWER THEFT DETECTION SYSTEM” has been presented on NATIONAL CONFERENCE ON SIGNAL PROCESSING COMMUNICATIONS AND VLSI DESIGN (NCSCV’09) Conducted by Department of Electronics and Communication Engineering, Anna University
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