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Introduction to PLCC & Tele-Protection S V S Sathyanarayana Manager(OS) Power Grid Corporation of India Ltd., RHQ,Se

Introduction to PLCC & Tele-Protection S V S Sathyanarayana Manager(OS) Power Grid Corporation of India Ltd., RHQ,Secunderabad M: 9490611042 Email: svssai@y ahoo.com. Welcome. VHF WIRELESS COMMUNICATION 100 – 300 MHZ LEASED P&T LINES POWERLINE CARRIER COMMUNICATION 30-500 KHZ

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Introduction to PLCC & Tele-Protection S V S Sathyanarayana Manager(OS) Power Grid Corporation of India Ltd., RHQ,Se

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  1. Introduction to PLCC & Tele-Protection S V S Sathyanarayana Manager(OS) Power Grid Corporation of India Ltd., RHQ,Secunderabad M: 9490611042 Email: svssai@yahoo.com Welcome...

  2. VHF WIRELESS COMMUNICATION 100 – 300 MHZ LEASED P&T LINES POWERLINE CARRIER COMMUNICATION 30-500 KHZ MICROWAVE COMMUNICATION 800 MHZ – 4 GHZ SATELITE COMMUNICATION MORE THAN 4 GHZ OPTICLE FIBRE COMMUNICATION TYPES OF COMMUNICATIONS

  3. SPEECH TELE PROTECTION TELE METERING TELE SIGNALLING TELE CONTROL TELE PRINTING WIDE AREA NETWORKING APPLICATIONS IN POWERSYSTEMS

  4. IN PLCC EHV POWER LINE IS USED FOR POWERSYSTEM COMMUNICATIONS THE PLCC HF SIGNALS (30-500KHZ) IS COUPLED TO THE EHV POWER LINE THROUGH COUPLING CAPCITOR IT IS USED FOR SPEECH AND DATA TRANSFERING IT IS ALSO USED FOR THE LINE PROTECTION HIGHLY RELIABLE COMMUNICATION SYSTEM MAINTENANCE FREE LESS INSTALLALTION COST NO RUNNING EXPENDITURE POWER LINE CARRIER COMMUNICATION

  5. CAPCITOR VOLTAGE TRANSFORMER WAVE TRAP LINE MATCHING UNIT BALANCING TRANSORMER 3 ELEMENT PROTECTION DEVICE DRAINAGE COIL LIGHTNING ARRESTOR EARTH SWITCH COAXIAL CABLE EHV TRANSMISSION LINE OUTDOOR EQUIPMENT OF PLCC

  6. PLCC PANEL ABB-ETI 21, BPL-9505,WS-WSP100 & PUNCOM PROTECTION COUPLER NSD60 & NSD61 OF ABB, 6710 OF BPL DATA MODEM NSK3,NSK4 & NSK5 OF ABB TELEPHONE EXCHANGE EPAX-200.3 & MDX50 OF BPL EXPRESS TELEPHONE FOR POINT TO POINT COMMUNICATION INDOOR EQUIPMENT OF PLCC

  7. THERE ARE DIFFERENT TYPES OF PLCC COUPLING SYSTEMS PHASE TO GROUND COUPLING PHASE TO PHASE COUPLING LINE TO LINE COUPLING INSULATED GROUND WIRE COUPLING INTRA BUNDLE COUPLING POWERGRID IS ADOPTING MAINLY PHASE TO PHASE COUPLING FOR ALL THE LINES METHODS OF PLCCCOUPLING

  8. PHASE TO PHASE COUPLING

  9. TYPES OF SPEECH SIMPLEX - ONLY ONE FREQENCY FOR TX & RX DUPLEX - SEPARATE FREQUENCIES FOR TX & RX TYPES OF SYSTEMS 4 WIRE - 2WIRES FOR TX (MOUTHPIECE) & 2WIRES FOR RX (EARPIECE) 2 WIRE - ONLY 2 WIRES FOR TX & RX WITH HYBRID 4 WIRE E&M - 2WIRES FOR TX & 2WIRES FOR RX PLUS ONE FOR SIGNELLING IN (E) AND ONE WIRE FOR SIGNELLING OUT(M) 2 WIRE E&M - ONLY 2 WIRES FOR TX & RX PLUS ONE FOR SIGNELLING IN (E) AND ONE WIRE FOR SIGNELLING TYPES OF DIALING PULSE - NORMAL ON/OFF DIALLING TONE - DUEL MULTI FREQUENCY DIALING (DTMF) BASICS OF TELEPHONY

  10. BLOCK DIAGRAM OF TELEPHONE

  11. MULTIPLUXING TIME MULTIPLUXING THE AVILABLE CHANNEL IS SHARED TO MANY BY SWITCHING ONE BY ONE FREQUENCY MULTIPLUXING THE AVILABLE CHANNEL IS SERVED TO MANY BY MODULATING THE INPUT SIGNALS WITH DIFFERENT FREQUENCIES MODULATION AMPLITUDE MODULATION THE AMPLITUDE OF THE CARRIER IS CHANGED WITH SIGNAL UNDER MODULATION FREQUENCY MODULATION THE FREQUENCY OF THE CARRIER IS CHANGED WITH SIGNAL UNDER MODULATION PHASE MODULATION THE PHASE ANGLE OF THE CARRIER IS CHANGED WITH SIGNAL UNDER MODULATION BASICS OF COMMUNICATION

  12. IN PLCC PANEL THE VOICE, TELEMETERING / TELE PROTECTION SIGNALS WILL BE IN THE RANGE OF 0-4 KHZ WORLDWIDE THE ALLOCATED FREQUENCY BAND FOR PLCC IS 30-500 KHZ IN POWERGRID EACH LINE IS HAVING 3 PLCC PANELS ONE FOR SPEECH & DATA TWO FOR SPEECH & TELE PROTECTION IN POWERGRID ABB,BPL,WS,PUNCOM MAKE PLCC PANELS ARE AVIALABLE PLCC PANELS

  13. ETI 21 IS A MODEL NAME OF ABB MAKE SINGLE CHANNEL AF MULTIPLUXER IN POWER GRID MAJORITY PLCC PANELS ARE ETI-21 ETI 21 CAN BE 20W OR 40W 20W SET WILL HAVE 3 TIERS P7EA,P7EB & P7EG 40 W SET WILL HAVE 4 TIERS P7EA,P7ES ,P7EB & P7EG ETI 22 IS A ABB MAKE TWIN CHANNEL AF MULTIPLUXER & RARELY USED IN POWERGRID PLCC PANEL ETI

  14. MODULE LAYOUT OF ETI-21 (20W)

  15. CARRIER SUPPRESED LOWER SIDE BAND SYSTEM TWO LEVEL MODULATION / DEMODULATION IF WITH 16 KHZ CARRIER RF WITH TX+16KHZ / RX+16KHZ CARRIER FREQUENCY DISTRIBUTION SPEECH (0-2KHZ) DATA/PROTECTION (2-3.4KHZ) PILOT (3.631 KHZ) / DIALING (3.581) SYNCHRONISATION BY AUXILARY CARRIER(16 KHZ) NET WORKING WITH BUILT IN COMPANDER CONTROL CARD FEATURES OF ETI-21

  16. ETI-21 BLOCK DIAGRAM

  17. SPEECH 4W E&M WITH COMPANDER CONTROL WITH EXCHANGE 2W E&M FOR EXPRESS TELEPHONES WITH 2WINT CARD INPUT LEVEL IS 0dB AT 600 OHMS IMPEDANCE INPUT AND OUPUT IS THROUGH O3EE CARD DATA 50 BAUD CHANNELS OF 5 NOS OR 200 BAUD CHANNELS 2 NOS OR 600 BAUD CHANNELS OF 1 NO INPUT IS IN 03EA CARD AND OUPUT IS IN 03EH CARD PROTECTION 600 BAUD CHANNEL WITH OdB LEVEL INPUT IS IN 03EA CARD AND OUPUT IS IN 03EH CARD RF INPUT/OUTPUT COAXIAL CABLE OF IMPEDENCE 75 OHMS/ 125 OHMS /150 OHMS INPUTS & OUTPUTS OF ETI-21

  18. TELEPROTECTION Protection of a circuit, the ends of which are geographically separate like Lines and Cables in which co-operation is obtained between the two relaying points by the transmission of information over the Distance by Telecommunication Technique.

  19. The types of tele-protections adopted in power system Phase comparison Distance protection (Permissive/Blocking) Direct Tripping The techniques available in Tele protection Protection couplers with coding : NSD60, NSD61 and 6710 Protection couplers with out coding: NSD40 etc The Typical Timings For the for Permissive/Blocking applications is 20m.sec & for Direct Tripping Schemes 28 to 30 m.sec TELEPROTECTION

  20. TELEPROTECTION

  21. THANK YOU

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