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220/132 KV Substation or Step down Substation.pptx
- 1. INDUSTRIAL TRAINING AT UPPTCL 220/132KV SUB-STATION SHAHJAHANPUR Presented by- Avanish Pal Roll no.- 1612220023
- 2. Uttar Pradesh PowerCorporation Limited (UPPCL) is the company responsible for electricity transmission and distribution within the Indian state Uttar Pradesh. For efficient operation & management Uttar Pradesh Power Corporation Limited (UPPCL) is further restructured into- 1. Dakshinanchal Vidyut Vitaran Nigam Limited (DVVNL)-Agra Zone 2. Madhyanchal Vidyut Vitaran Nigam Limited (MVVNL)-Lucknow Zone 3. Pashchimanchal Vidyut Vitaran Nigam Limited (PVVNL)-Meerut Zone 4. Purvanchal Vidyut Vitaran Nigam Limited (PUVVNL)-Varanasi Zone 5. Kanpur Electricity Supply Company (KESCO)-Kanpur City ABOUT UPPCL
- 3. SUBSTATION • A substationis a place which is used for switch generation (one voltage level to another voltage level). • So the substations may be called as link between generation stations and consumers. •Type of substation 1. Indoor substation- All equipment are mounted inside, safer and require lesser space. 2. Outdoor substation- All equipment are mounted outside and require more area.
- 4. SINGLE LINE DIAGRAMOF 220/132 KV SUB-STATION SHAHJAHANPUR
- 5. MAJOR COMPONENTS OF220 KV SUBSTATION • POWER TRANSFORMER • POTENTIAL TRANSFORMER • CURRENT TRANSFORMER • CIRCUIT BREAKERS • LIGHTENING ARRESTOR • PROTECTIVE RELAYS • ISOLATOR
- 6. POWER TRANSFORMER • Transformeris a static machine, which transforms the potential of alternating current at same frequency. • It works on the principle of mutual inductance. • They are of two type step up and step down . • Two transformer are used in Shahjahanpur substation • 160 MVA ( for 220/132kv) • 40 MVA (132/33kv)
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- 8. POTENTIAL TRANSFORMER • Thepotential transformer may be defined as an instrument transformer used for the transformation of voltage from a higher value to the lower value. • Potential transformer(also called as voltage transformer) are a parallel connected type of instrument transformer. • The potential transformer is made with high- quality core operating at low flux density so that the magnetizing current is small.
- 9. CURRENT TRANSFORMER • Acurrent transformer is used for measurement of alternating electric current. • It produces a current in its secondary which is proportional to the current in its primary. • Current transformers are the current- sensing units of the power system and are used at generating stations, electrical substations, and in industrial and commercial electric power distribution.
- 10. CIRCUIT BREAKER • Acircuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by excess current from an overload or short circuit. • Its basic function is to interrupt current flow after a fault is detected. • Unlike a fuse, which operates once and then must be replaced, a circuit breaker can be reset (either manually or automatically) to resume
- 11. LIGHTNING ARRESTERS • Lightningarrester diverts the abnormal high voltage to the ground without affecting the continuity of supply. • It is connected between the line and earth, i.e., in parallel with the equipment to be protected at the substation. • It should not draw any current during normal operating condition. • The lightning arrester is located close to the equipment that is to be protected
- 12. PROTECTIVE RELAYS • Protectiverelay work as a sensing device, it senses the fault, then known its position and finally, it gives the tripping command to the circuit breaker. • The circuit breaker after taking the command from the protective relay, disconnect. • Primary sensing unit .
- 13. ISOLATOR • It isan off-load device. • It disconnects or isolates the circuit from the main power supply. • Isolators may provide additional safety features like, when switched of the trapped charge will be ground through a ground terminal in the isolators • They are also used in homes to provide essential safety and protection against any electrical problem.
- 14. FEEDER • A setconductor that originate at a primary distribution centre and supply power to one or more secondary distribution centre • Feeders are the power lines through which electricity is transmitted in power systems. • Feeder transmits power from Generating station or substation to the distribution points.
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