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Uttar pradesh power corporation limited

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Uttar pradesh power corporation limited

  1. 1. UTTAR PRADESH POWER TRANSMISSION CORPORATION LIMITED (132KV Sub Station Dasna ) VIKAS RAGHUVANSHI (1402721916) EN-4th year
  2. 2. CONTENT  Description of 132KV substation DASNA  Single line diagram of UPPCL, DASNA (132KV)  Main equipment at DASNA substation 132KV  Lightning Arrester  Capacitor Voltage transformer  Isolator  Circuit breaker  Transformers  Some important components  References
  3. 3. DISCRIPTION OF 132KV SUBSTATION DASNA  The 132KVpower substation has the capacity of (2*40 MVA+ 1*20MVA).  It receives two 132 KV lines from Muradnagar (circuit 1) and Gulaothi (circuit2).  It step down this supply to 33KV . It gives supply to Coca cola, Mother Dairy, Rama Hospital and other feeder.
  4. 4.  Capacitor bank is connected to main bus of 33KV. It is provided to improve power factor & voltage profile. Capacitor Bank comprises of two units of 10 MVAR making total capacity of 20 MVAR.  Power Bank:- 54 cell is series connected. Each cell 2V.,300AH total capacity=108V.
  5. 5. 132kV Substation  It is devided into two(2) parts:- A. Panel Section A. Control Panel Section B. Relay and Protection Panel Section B. Switch Yard A. 132kV section B. 33kV section C. Battery Room (Extra)
  6. 6. A. Panel Section  It is a room which contains all types of panels.  It has two sections:-  Control Panel Section It contain panels related to controlling of instruments. E.g.:- feeder panel, Apex panel, etc.  Relay And Protection Panel Section It contains panels related to relay systems and protection systems. E.g.:- Relay panel, line protection panel, etc.
  7. 7. B. Switch Yard  It is the field where components used in controlling supply and measuring supply(incoming and outgoing) are placed.  Some of these many components are:-  C.Bs  Isolators  C.Ts  P.Ts  L.As etc.
  8. 8. MAIN EQUIPMENT AT DASNA SUBSTATION 132KV
  9. 9. SINGLE LINE DIAGRAM
  10. 10. The line moves ahead passing through insulators & to the circuit breakers (CB) moving ahead to the main bus bar line moves through Capacitive Voltage Transformer (CVT) & Current Transformer (CT)Capacitive Voltage Transformer (CVT) Current Transformer (CT) 132KV SF6 CB
  11. 11. LIGHTNING ARRESTERS
  12. 12.  A lightning arrester is a device used on electrical power system to protect the insulation and conductor of the system from the damping effect of lightning.  The lightning arresters has a high voltage terminal and a ground terminal.  When a lightning surge travels along the power line to the arrester, the current from the surge is diverted through the arrester, in most cases to earth.
  13. 13. CAPACITOR VOLTAGE TRANSFORMER  A capacitor voltage transformer(CVT) or capacitance coupled voltage transformer(CCVT) is a transformer used in power system to step down extra high voltage signals and provide a low voltage signal, for measurement or to operate a protective relay.  In its most basic form the device consists of three parts– two capacitors across which the transmission line signals is splits, and one inductive element to tune the device to the line frequency, and a transformer to isolate and further step down the voltage for the instrumentation or protective relay.
  14. 14. ISOLATER  In electrical engineering, a disconnector, disconnect switch or isolator switch is used to ensure that an electrical circuit is completely de- energized for service or maintenance.
  15. 15. STEPS OF OPERATION OF ISOLATOR  SEQUENCE OF STEPS FOR ATTENDING MAINTAINANCE— 1. Open CB on no load or full load 2. Open the isolator on no load 3. Close the earth switch EQUENCE OF STEPS FOR KEPT IN SERVICE— 1. Open the earth switch 2. Close the isolator 3. Close the CB
  16. 16. CIRCUIT BREAKER  A CB is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by overcurrent or overload or short circuit.  Its basic function is to interrupt current flow after protective relays detect a fault. Unlike a fuse, which operates once and then must be replaced, a circuit breaker can be reset (either manually or automatically) to resume normal operation.  Whenever a fault occur trip coil gets energised, the moving contact are pulled by some mechanism and therefore the circuit is opened.
  17. 17. TYPES OF CB
  18. 18. TRANSFORMERS POWER TRANSFORMERS Transformer is a static machine, which transforms the potential of alternating current at same frequency. It means the transformer transforms the low voltage into high voltage and vice versa. It works on the principle of mutual inductance. When the energy is transformed to a higher voltage ,the transformer is called step up and if energy transformed to a lower volt, the transformer is called step down.
  19. 19. TWO 10MVAR CAPACITOR BANKS(20 MVAR) FOR POWER FACTOR CORRECTION & VOLTAGE STABILITY FOR DISTRIBUTION Capacitor Cells
  20. 20. SOME IMPORTANT COMPONENTS  EARTH SWITCH:- it is a switch normally kept open and connected b/w earth and conductor. If the switch is closed ,it discharges the electric charge to ground, available on the uncharged line.  BUS –BAR:-when number of lines operating at the same voltage levels needs to be connected electrically, bus bars are used.Bus bars are conductors made of copper or alluminium, with very low impedance and high current carrying capacity.
  21. 21.  CURRENT TRANSFORMER(CT):-the lines in the substations carry currents in the order of thousands of amperes.The measuring instruments are designed for low value of currents. CT are connected in lines to supply measuring instruments and protective relays.  INSULATORS:- they supports the conductor(bus bar) and confine the current to the conductor. The most commonly used material for manufactures of insulators is porcelain. There are several type of insulator (i.e. pin type, suspension type, strain type etc.) and there used in substation will depend upon the service requirement.
  22. 22.  POTENTIAL TRANSFORMERS(PTs):- The lines in the substations operate at high voltage. The measuring instruments are designed for low voltages. PTs are connected in lines to supply measuring instruments and protective relays. These transformers make the low voltage instruments suitable for measurement of high voltages.
  23. 23. Important Terms  Tripping – Power goes due to over load . It is for the protection of components.  Shut down – Power is cut due to maintenance in progress. It is done manually.  Break down – Power goes due to any fault in the line. When fault is removed , power is back.  Rosting – Power is cut deliberately on order of higher authority due to shortage of power.
  24. 24. REFERENCE  Ministry of Power, Govt. of India.  www.wikepedia.com  http://upptcl.org/index.htm  www.home-energy-metering.com  www.nic.in.
  25. 25. THANKS

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