RohitPowerGridReport
- 1. POWER GRID CORPORATION OF INDIA LIMITED SUBMITTED BY: PROJECT REPORT ON PATNA 400/220KV SUBSTATION Control, Automation & Protection Of Patna Substation ROHIT SCHOLAR NO: 13-1-3-043 ELECTRICAL ENGINEERING NIT SILCHAR
- 5. EVOLUTION OF NATIONAL GRID SOUTHER N REGION WESTER NREGIO N EASTERN REGION NORTHERN REGION NORTH- EASTERN REGION 1 2 3
- 7. AN OVERVIEW OF PATNA SUB STATION LAYOUT
- 9. 400 KV SLD
- 10. 220 KV SLD
- 11. INTRUDUCTION TO SUBSTATION & ITS EQUIPMENTS The First Step in designing a Substation is to design an Earthing and Bonding System.
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- 14. • SWITCHYARD PROTECTION Specifications of SF6 C.B. used in substation:-
- 24. 23 Fire fighting system -sensors, detection system -water spray system -fire protection control panels, alarm system -water tank and spray system To sense the occurrence of fire by sensors and to initiate water spray, to disconnect power supply to affected region to pin- point location of fire by indication in control room. 24 Auxiliary standby power system -diesel generator sets -switchgear -distribution system For supplying starting power, stand by power for auxiliaries. 25 Telephone, Telex system, Microwave system For internal and external communication. Pre-Commissioning Testing of equipment :
- 28. This is to measure the resistance of secondary winding & is done for all the cores with DIGITAL MULTIMETER.
- 31. LOADING TRANSFOR TONG TESTER (LOW RANGE FOR SEC.
- 33. 9. Contact Resistance Measurement.
- 34. energisation.) TRANSMISSION LINE PROTECTION & AUTO RECLOSE SCHEME
- 36. Z3 Z2 Z1 80% 100+ 100 + 100 + 20% Z3R 20% Section 1 Section 2 Section 3 Zone 1 = 80% of ZL or 70% ZL in Double Circuit lines Zone 2 = 120% of ZL Zone 3F = 220% of ZL Zone 3R = 20% of ZL Z 1A Z 2A Z 3A SETTING CRITERIA
- 37. PERMISSIVE UNDER REACH SCHEME Fault beyond the Zone 1 reach of relay A but within the Zone 1 reach of relay B Distance relay at B will trip the breaker in Z 1 time & send carrier to end A. Fault detected in Zone 2 reach of relay A and carrier recd. Trips instantaneously without Zone 2 delay A B Z 1A Z 1B Fault
- 43. SUBSTATION AUTOMATION AND REMOTE OPERATION • • • • •
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