PPT ON 33/11KV SUBSTATION

PPT ON 33/11 KV SUBSTATION

1. A PRESENTATION ON SUMMER TRAINING FROM SHIRBHAVI , SANGOLA 33/11 KV SUB-STATION PRESENTED BY : PHADTARE RAVI DATTATRYA ROLL NO.- 21 SUBMITTED TO : MR. PATIL J. B ( PROF. EE DEPT )

2. CONTENTS : SUB STATIONS BUS BAR TRANSFORMER CURRENT TRANSFORMER POTENTIAL TRANSFORMER DISTRUBUTION TRANSFORMER INSULATORS PROTECTIVE RELAY CIRCUIT BREAKER CAPACITOR BANK METERING AND INDICATING INSTRUMENT LIGHTENING ARRESTORS LINE ISOLATOR SINGLE LINE DIAGRAM

3. SUBSTATION A Station is a subsidiary station of an electricity generation, transmission,& distribution system where voltage is transformed to high to low or the reverse using transformers. A substation generally have switching, protection, & control equipment & one or more transformers. CONSTRUCTIONAL FEATURES OF 33/11 KV SHIRBHAVI SANGOLA , In this substation the power is coming from two lines namely 440V SHIRBHAVI 440V DEVAKATEVADI

4. 33 /11 KV Yard

5. BUS BAR A Bus bar is a conducting bar that carries heavy currents to supply several electric circuits. Bus bar is made from ‘Cu’ and ‘Al’. TYPES OF BUS BAR- Main Bus Bar Auxiliary Bus Bar One Bus Bar is Main Bus Bar and another is Auxiliary Bus Bar.

6. TRANSFORMER A Transformer is a static device that transfers Electrical energy from one Electrical circuit to another Electrical circuit by means of a common Magnetic Circuit . TRANSFORMER USED IN GSS DISTRIBUTION X - MER C.T. P.T.

7. d i n g) DISTRUBUTION TRANSFORMER To step-down the voltage and transfer power from one A.C voltage to another A.C Voltage at same frequency. MAIN PARTS OF POWER TRANSFORMER- Winding(H.V winding , I.V winding) Core Tap changer Conservator Tank Buchholz Relay Dehydrating Breather Oil Temperature Indicato r

8. CURRENT TRANSFORMER Current Transformer :- A C.T is used to step down current for measurement, control and protection. Current Transformer is an instrument transformer used to protection & Metering of high values of current.

9. POTENTIAL TRANSFORMER Potential Transformer :- Potential Transformer are Instrument Transformer. A P.T is used to step down voltage for measurement, control and protection.

10. INSULATORS transmission lines, In order to avoid current leakage to the Earth, through the supporting structure provide to the conductor of overhead insulators are used.

11. PROTECTIVE RELAYS A protective relay is a device that detects the fault and initiates the operation of the C.B. to isolate the defective element from the rest of the system The relay detects the abnormal condition in the electrical circuit by constantly measuring the electrical quantities, which are different under normal and fault conditions .

12. There are several metering and indicating Instrument (e.g. Ammeters, Voltmeters, energy meter, etc.) installed in a Substation to maintain which over the circuit quantities. The instrument transformers are invariably used with them for satisfactory operation . Metering and Indicating Instruments

13. CI R CUIT BREAKER A Circuit Breaker is an automatically or manually operated electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit. TYPES OF CIRCUIT BREAKER- which is used in 33/11kv substation oil circuit breaker

14. Capacitor banks are used to improve the quality of the electrical supply and the efficient operation of the power system. Studies show that a flat voltage profile on the system can significantly reduce line losses. CAPACITOR BANK

15. ISOLATING SWITCH In Sub-Station, it is often desired to disconnect a part of the system for general maintenance and repairs. This is accomplished by an isolating switch or isolator isolator Switches are operate only when the line is which they are connected carry no load.

16. LIGHTENING ARRESTORS Lightening arrestors with earth switch lightening arrestors after the current transformer are used so as to protect it from lightening i.e. from high voltage entering into it . This lightening arrestor has an earth switch, which can directly earth the lightening. lightening. The arrestor works at 30° to 45° angel of the lightening making a cone

17. LINE ISOLATOR The line isolators are used to isolate the high voltage flow through the line into the bus. This isolator prevents the instruments to get damaged It also allows the only need of voltage and rest is earthed by itself Insulators are used in electrical equipment to support and separate electrical conductors without allowing current through themselves.

18. Single line diagram

19. Thank you