Prepared By: Aayush Kumar

Study of Power Distribution of 3MTPA Blast Furnace in TATA

STEEL

Study PatternPower Supply in IBF• Grid Supply• TRT Emergency Generator• UPS System

Study of Power Distribution Elements• Transformers• Busbars and Cables• Motors

Power Maintenance and Quality Improvement• Protection System• Harmonics Filtering• Power Factor Correction

Power Supply in IBFGrid Supply• Obtained directly from DVC and Tata Power at 132 kV;

stepped down to 6.6kV at LBSS and further to distribution

Emergency TRT Generator• Local power generation at 10kV (16 MW) and stepping up to 33kV• Oil based generator; used in case of regional shut-down

Backup UPS System• 6 x 60 kVA UPS system to ensure backup

Power Distribution Architecture

Power Distribution Elements• Transformer rating from 20kVA to 20 MVA

• Total of 27 transformers in operation (Dry and Oil Cooled)

• Maintenance Tests

Transformers

• Busbars used for more delicate and firm connections (High Ampere Rating)

• Cables of different rating (LT, HT, EHT, UHT)Busbars &

Cables

• Electrical Characteristics Test• Physical Test• Motor Current Signature Analysis• Advanced Vibrational Analysis

Motors

Power Maintenance and Quality Improvement

Maintenance

Relays Circuit Breakers

Quality Improvement

Harmonic Filtering

Power Factor Correction

• Siprotech 7SJ63 Relay

• MiCOM P220 Motor Protection

• G60 Generator Protection

• MM 30 LT Motor

• Air Circuit Breaker

• Vacuum Circuit Breaker

• Vacuum Circuit Unit

• Active Harmonic Filter

• Passive Harmonic Filter

• Reduce reactive load

• Use of Capacitor bank

References• Materials Provided by Tata Steel

• Theoretical aspects by SNTI• Data Sheets of equipment installed

• Device Manuals• Micom P220 Relay• General Electric G60 Generator Protection Relay• Siprotech 7SJ63 Relay• MM30 Relay• L&T SR21i Release

• Electrical Engineering Related Blogs• http://www.electrical4u.com/tan-delta-test-loss-angle-test-dissi

pation-factor-test/• http://electrical-engineering-portal.com/selection-of-number-of-

cable-cores-with-emphasis-on-sizing-parameters• https://electricalnotes.wordpress.com/2014/08/05/panel-design

-calculate-size-of-bus-bar/• Electrical Machinery by Dr. P.S. Bhimbhra