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  • 1. Submitted By:- yogesh kumar gurjar IIMET/ECE/10/777 1
  • 2. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. Training overview Company profile Introduction of PLCC Component Used Circuit Description Maintenance & Fault Tracking Advantages Limitations Key Learning Conclusions References 2/9/2014 2
  • 3.  Name Of Industry : Rajasthan Rajya Vidyut Prasaran Nigam Limited Location: 132KV CHAMBAL GSS, Jaipur  Reporting Officer: R.P. MEENA  Duration of training : 1th June to 15th July  Department of training :Electronics & Communication  3
  • 4.      RRVPNL started working from july1957 Sh.Shailendra Agarwal,IAS is the Chairman & MD of RRVPNL RVPN Provides the pathway for power within whole of Rajasthan This is the body of big organization act , like public limited companies It works as electric Power distribution regulator within the state. 4
  • 5. INTRODUCTION • PLCC is the method of transmitting information using power network. • Its equipment are used for point-to-point communication over high voltage power lines • Its equipments are used send/receive speech/data/teleprotection signals. • It’s the most economical and reliable method of communication for medium or long distance. 5
  • 6. • The telephone communication system cannot be directly connected to the high voltage lines suitably designed coupling devices. • These usually consist of high voltage capacitor with polaritical devices used in conjunction with suitable line matching unit (LMU) for matching the impedance of line to that of the coaxial cable connecting the unit to the PLC transmit-receive equipment. 6
  • 7. The signal that can be transmitted over the PLCC include  Speech signal (300-2000Hz )  Data signal (2000-3000Hz) 7
  • 8.        PLCC station Line matching Unit CVT/CC Earth Switch Lightening Arrestor Wave Trap Co axial Cable 8
  • 9.   It is the station where (modulation)Transmitting , Receiving (Demodulation ) , Amplification , Filtration are performed. Transmitter : 9
  • 10. 10
  • 11.   It is Control Voltage transformer/ Coupling capacitor. This is used for blocking the high voltage entering the PLCC Equipment. to Earth Switch  This is used at the time of maintenance of LMU. 11
  • 12. • Used to protect the system from the damaging effect of lightening. • It works as an insulator between light and the power line. Co axial Cable  This is used for inter connection between PLCC & L.M.U for carrying the high frequency signal. 12
  • 13. The out-put of PLCC is connected to the matching unit before to the power lines to achieve the proper impedance matching in between PLCC Equipments and power line. 13
  • 14. PLC signal Blocking • Consists of a number choke coils connected in series. HV Line • It prevents carrier current from entering to the power equipment. Power energy PLC Signal Substation • Offer negligible impedance to power frequency & high impedance to carrier frequency 14
  • 15. 15
  • 16. • The power frequency and radio frequency currents are sorted by this arrangement • Carrier currents are prevented to enter station bus by wave trap & power frequency current is blocked by coupling capacitor, from the PLC equipment. • Hence we get power current at the bus & carrier current at PLC equipment. 16
  • 17. • PLCC work on rectified AC or main supply, when supply goes off, we make use of a device for proper functioning of PLCC called battery charger. • This is the device that provide supply to the PLCC equipment for uninterrupted working. • It provide DC to the panel by battery. 17
  • 18.  FAULT ANALYSIS In fault analysis the faulty devices are checked in this serial or manner:1. 2. 3. 4. Telephone or tale operation signal Cabling low frequency circuit or DC power supply PLC equipment HF transmission path 18
  • 19. 1. The control circuit boards should be inserted far firmly. 2. The charger should be switch off once in every month. 3. The battery terminal should be connected first and the AC input after that. 4. All mounting bolts should be checked before energizing. 19
  • 20.  No separate wires are needed for communication purpose.  Both communication and power transfer can be possible on same circuit.  Power lines provides the shortest route between the power station.  Increased reliability.  Lower attenuation over long distance.  Implementation cost is reduced. 20
  • 21.  Reflection are produced on spur lines connected to high voltage line. This increased attenuation and create other problem.  High voltage lines have transformer connections, which attenuate carrier currents.  Noise introduced by power lines is far more than in case of telephone lines. 21
  • 22.    PLCC is mainly used for telecommunication, tele-protection and tele-monitoring between electrical substations through power lines. In a PLCC system the communication is established through the power line. The carrier frequency range is allocated to include the audio signal, protection and the pilot frequency. 22
  • 23. The Training was based on communication over existing power line 23
  • 24.  Rajasthan Rajya Vidyut Utpadan Nigam Ltd. ( )  Jodhpur dicom vidyut vitran nigam limited ( )  Department of Energy Government of Rajasthan ( )  Jaipur vidhut vitran nigam limited ( )  Rajasthan state load dispatch center ( ) 24
  • 25. Questions?? 25
  • 26. Thank You 26