Industrial Visit to Oman Transmission Grid-Station, Ibri, Oman
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An industrial visit was carried out at OMAN TRANSMISSION GRID SUB-STATION (400KV/220KV/132KV/33KV/11KV/415V) – IBRI maintained by Oman Electricity Transmission Company on 22 March 2018.
22 students of II- year Diploma Electrical Power Engineering along with two teachers (Mr. Veera Nagireddy V and Srinivasa Rao. N) reached the sub-station at 10.15am. The Sub-Station staff received us well. HSE Officer, Mr. Hamed Al Shali, explained the safety rules in the sub-station. The Operation and Maintenance Engineer, Mr Waleed Al Kalbani, explained the load dispatch centre in Muscat and how the sub-station receives electrical power from the generating station.
Another Operation and Maintenance Engineer, Mr Yahya Al Ghafri, elaborated about the control room operations and the methods they follow to control feeders, transformer and bus bars. The control room has remote control panels for 375/500 MVA transformers, 220KV Relay panels, 220KV Bus coupler. The battery room consists of battery banks of 48 volts. We also visited the Gas Insulated Sub-Station, where SF6 gas is used for insulation. They showed us 132 KV power cables in their cellar.
Assistant Engineer, Mr Salim Al Sawafi, explained the 500 MVA power transformer and cooling system for power transformers. They explained the use of protective and measuring equipment like current transformers, voltage transformers, auto-transformers, circuit breakers, lightning arresters, isolators, earthing transformers, earthing switches, neutral earthing, etc.,
The engineers gave us a live demonstration of circuit breakers, disconnecting switches, earthing switches and isolator operations.
Students clarified their technical and practical doubts by interacting with the engineers. In this sub-station, power is stepped down from 400KV TO 220KV T0 132KV T0 33KV TO 11KV. 11KV, which is further sub-divided into 415 V for sub-station lighting. Firefighting equipment was also installed in order to control fire, in case of fire accidents.
This visit was very helpful to the students because they received first-hand knowledge of what they study in their ELECTRICAL POWER SYSTEMS (EEPW 2252), and now they are well familiar with terms like transmission lines, underground cables, corona, insulators, circuit breaker, bus bar and earthing systems.
We, along with students, would like to extend our gratitude to the company for the permission and support they gave to make our visit a success with accomplishment of objective and our college of Technology HOD Mr Nasser Al-Shammakhi and
HOS Dr Illankumaran. V, for arranging this visit for our student.