The scope of work is to perform the following studies in ETAP & PSCAD
1. Load flow study
2. Short circuit study
3. Relay Co-ordination study
4. Arc Flash study
5. Insulation coordination study(33kV)
a)Temporary Over Voltage
b)Slow Front Over Voltage
6. Training on ETAP
Incoming Power Supply: The airport receives power from the Electricity Board at two locations within the airport plot: the Main Receiving Substation (MRSS) and the East Substation (ESS). The power is received at a voltage level of 33 kV.
Step-Down Transformation: The 33 kV voltage is stepped down to 11 kV at both MRSS and ESS. This lower voltage is then circulated throughout the airport plot to feed various distribution substations.
Main Low Voltage Panels: At the distribution substations, the 11 kV supply is further stepped down to 415V to feed the main low voltage panels.
Transformers at MRSS and ESS: Each substation (MRSS and ESS) is equipped with two Power transformers, TP-01 and TP-02. These transformers have a power rating of 25 MVA and a voltage rating of 33/11 kV.
Medium Voltage Switchgear: The medium voltage side of the power distribution system consists of two 11 kV switchgear units. Each switchgear unit has three incoming feeders:
• Grid Side Feeder,
• DG Incoming Feeder,
• Solar Incoming Feeder (for future consideration).
Outgoing Feeders: Each MV switchgear unit has a total of six outgoing feeders. These feeders are connected in a ring system, which provides redundancy and improved reliability in power distribution. Among the six outgoing feeders, five are ring feeders, while one is a utility feeder.
Distribution Substations: The power distribution system includes a total of 31 distribution substations. Currently, 24 substations are in working condition, while the remaining 7 substations are designated for future extensions. These substations play a crucial role in stepping down the voltage from transmission level to a lower voltage suitable for local distribution.
Distribution Transformers: There are 53 No’s of distribution transformers proposed for the substations. These transformers have different power ratings and operate at a voltage of 11/0.433 kV.
Diesel Generators: The MRSS substation has 7 diesel generators rated at 11 kV, while the ESS substation has 4 diesel generators rated at 11 kV. Each individual generator has a power output of 2.250 MVA.
Congratulations to Selvakumar and Ajith G for bagging the project.
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