New Plc Ppt (2)

POWER LINE communication BASED POWER THEFT DETECTION SYSTEM

GUIDED BY: Mrs. S.SUJA M.E., EEE DEPT., CIT BY D.RAGUBALAN 07MER06 EMBEDDED AND REAL TIME

POWER THEFT IN INDIA v Introduction v Hooks & cables v Power theft & India v Utility meters v Monitoring system v Use of PLC in monitoring system v End of the power theft

OVER VIEW v The objective of the project is to identify methods for detecting power theft. v The power theft is to be i. detected, ii.located and iii. communicated to the authorities. v Parameters of power delivery includes power line current, power line voltage and network load distribution.

DIAGRAM FOR POWER THEFT DETECTION SYSTEM

USER DEVICE

SENSOR Consumer premises

BLOCK DIAGRAM MODEM PORTION OF POWER STSTEM (POWER LINE) EB premises POWER LINE MODEM

COMPUTER

BLOCK DIAGRAM FOR CONSUMER PREMISES

CIRCUIT DIAGRAM FOR CONSUMER PREMISES

BLOCK DIAGRAM OF EB PREMISES

CIRCUIT DIAGRAM OF EB PREMISES

POWER LINE COMMUNICATION(PLC) v 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. v The components involved in PLC are the v Power Line Carrier Unit – provide signal transmission and reception v Coupler – for “clamping” around a live wire thus injecting the communication signals into the power line. v PLC modem v The monitoring system mainly has the following functions: 1.Remote meter-reading 2.Data acquisition 3.Thread loss

PLC TRANSMISSION v 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. v square wave with a max Delay of 100 μs from the zero crossing point v The maximum delay between signal envelope input and 120KHz output bursts is 50 μs. v Therefore, it should be arranged that outputs to the within 50 μs.

PLC TRANSMISSION 5

5

1

2

CODE TRANSMISSION v 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. v Therefore only the 1 ms "envelope" need be applied to their inputs. v 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

wa ve

CODE TRANSMISSION v A complete code transmission encompasses eleven cycles of the power line. v 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. v 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 vUnder power theft, the relay is switched off isolating the area of power theft from the EB side . vLCD display also indicates power theft.

CONCLUSIONS vThe system functions with real-time monitoring users and burden forecast, which uses MV&LV PLC as its transmission media. vThe system is integrated with management and burden control.

power

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 v “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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