A

seminar on Practical Training taken

at

220KV GSS PINDWARA

PRESENTED BY:Pankaj Rawal4th year, EEEE/11/093

DEPARTMENT OF ELECTRICAL ENGINEERING POORNIMA COLLEGE OF ENGINEERING

ISI-6 RIICO INSTITUTIONAL AREA, JAIPUR -302022

GIUDED BY:Mr. Vikash kr. SainiDept. Of Electrical Engg.

2014-15

CONTENTS• Introduction• Definition Of sub-Station• Component Of sub-station• Single Line Diagram Of Sub-station• Lightning Arrestor• Capacitor voltage Transformer• PLCC• Isolater• Current Transformer• Circuit Breaker• Bus Bar• Transformer• Protective relay• Control room• Conclusion

INTRODUCTION RVPNL is a company of Rajasthan State Electricity

Board(RSEB) established by government of Rajasthan. Aim of RVPNL is to provide reliable transmission service to customers. 220 KV G.S.S., Pindwara is a part of RVPNL.

It is established on 19 July 2000 by Govt. Of Rajasthan under the Provision of Rajasthan Power Sector Reforms Act 1999 as the successor company of RSEB.

Earlier this sub-station Pindwara was 132kv GSS Then in 2008 it become 220kv GSS with total capacity of 125MVA.

DEFINITION OF SUBSTATION

Sub-station is a subsidiary station of an electric generation ,transmission and distribution system where voltage is transformed from high to low or low to high voltage using transformers. Electric Power may flow through several sub-station between generated plant and consumer and may be changed in voltage in several steps.

COMPONENT OF SUBSTATION

1. Primary power lines

2. Ground wire

3. Overhead lines

4. Transformer for measurement of electric voltage

5. Disconnect switch

6. Circuit breaker

7. Current Transformer

8. Lightning arrester

9. Main Transformer

10. Control building

11. Security fence

12. Secondary power lines

SINGLE LINE DIAGRAM

LIGHTENING ARRESTOR

• Lightning arrester is a protective

device which provides protection

against high voltage surges. A

lightning arrester has two terminals

viz a high voltage terminal and

a ground terminal.

CAPACITIVE VOLTAGE TRANSFORMER

• Capacitive voltage transformers are special kind of power transformers using capacitors to step down the voltage.

capacitive voltage transformer

WAVE TRAP(LINE TRAP)

Wave trap

• A Line trap (high-frequency stopper) is a maintenance-free inductor, mounted inline on high voltage AC transmission power lines to prevent the transmission of high frequency (40 kHz to 1000 kHz) carrier signals of line communication to unwanted destinations.

POWER LINE CARRIER COMMUNICATION

• PLCC for exchange of data and transfer of messages between substations, voice communication is necessary. For this purpose high frequency carrier current is transmitted over same transmission line on which power is transmitted. Hence this communication is called as power line carrier communication.

ISOLATOR

• It isolates the devices from live line when there is a maintenance. It operates when there is no load. It is also used to change bus bar line from main to reserve or vise versa.

220 KV ISOLATOR

CURRENT TRANSFORMER

• C.T. is used to measure high value of current. C.T.`s secondary is connected to relay to protect the system against Overcurrent.

CurrentTransformer

CIRCUIT BREAKER

• Circuit breaker Today, two most popular Circuit breakers are used in substation which are: Vacuum Circuit breaker

& SF6 Circuit breaker. Oil and Air blast Circuit breaker was used in earlier decades.

BUS BAR

• Bus Bars are common electrical component through which a large no. of feeders operating at same voltage have to be connected.

BUS COUPLER

• It is nothing but arrangement of joining of two buses.• It is use for load sharing purposes.

TRANSFORMER

• The transformer is a static apparatus, which receives power/energy at it, one circuit and transmits it to other circuit without changing the frequency.

• 1. Primary and secondary coils (circuit) or windings.• 2. Core• 3. Main Tank• 4. Conservator• 5. Breather• 6. Radiator• 7. Buchholz relay• 8. Bushings (HT & LT) (Primary or secondary)• 9. Cooling fans• 10. Tap changer (on load and off load)• 11. NGR (Neutral Grounding Resistance) to minimize the

earth fault current

MAIN PART OF TRANSFORMER

POWER TRANSFORMER

To step-up or step-down the voltage and transfer power from one a.c. voltage to another a.c. voltage at the same frequency.

CAPACITOR BANK

• The capacitor bank provides reactive power at grid sub-station.the voltage problem frequently reduce so of circulation of reactive power.

PROTECTIVE RELAY

• A protective relay is a device that detects the fault and initiates the operation of the circuit breaker to isolator the defective element from the rest of the system.

CONTROL ROOM

CONCLUSION

• I studied lot of knowledge. In G.S.S. lot of instrumentation and protection required. So I gain lot of knowledge.

• Training at 220kv GSS pindwara gives the insight of the real instrument used.There are many instruments like Transformer, C.T.,P.T.,L.A.,relay,busbar,capacitorbank,insulators,isolators,control room,etc.

• To get insight of the sub station ,how things operate,how things manage all is learned there.

REFERENCES

www.rvpnl.com

www.wikipedia.org

www.electricalhub.com

www.techforu.com

QUER

IES