design t&d of city
Post on 20-May-2015
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Problem Statement
Show locations and layouts of power plant(s) (type also), switchyard & local distributing unit, distribution / feeder lines, protection scheme for whole system along with proper ratings for the given city. Give a list of equipments (also give their numbers).
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Location of Generation Plant:
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• The Power Plant for the given city has been put up in the area between Industrial Area 1 and Railway Station 2.
Type of Generation Plant:• A SMALL HYDRO Power Plant
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The choice of the type of plant was decided by the factors as under:
• Topography of the area.
• Maximum Power demand of the city (Approx 7.48 MW).
• Cost Consideration.
• Pollution Factor.
• Judicious use of available resources.
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Cost of generation is cheapest highest efficiency and highest project life amongst renewable.
Sector Rs/kWh Efficiency (%) Project Life
Small hydro 1.00–1.50 85-90 60
Wind energy 2.00–2.75 40 20
Solar PV 10.00–12.00 15 20
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• Maximum Demand Calculated is found to be 7.48 MW between 5 a.m. to 6 a.m.
• Plant Capacity Will be 10 MW. • IT consists of 2 Generating Units of 5 MW Capacity for the reliable supply of power.
• Use of Bulb Turbine for Low Heads and Efficiency.
About The Plant
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Distribution System:
• Distributing Unit is used to supply the power to Industrial Area 1.
• Substation 1 is used to supply power Railway Station 2 & Railway Traction 2.
• Substation 2 is used to supply power to Rural Area.
• Substation 3 is used to supply power to Industrial Area 2, Business complex, Hospital, Railway Station 1 and Railways Traction .
•Substation 4 is used to supply power to School, Residential area, Street Lighting, Railway Station 1 and Railway traction.
•Two Railway Substations are used for the Traction Lines .
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Position Of Sub Stations
•Substation 1 is taken near Power plant
•Substation 2 is taken for the Rural so near by it.
•Sustation 3 is taken near by Hospital since the availability of land.
•Substation 4 is taken near by School and Railway Traction And Station 1.
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Protection Scheme
•Lightning Arrestor•Potential Transformer•Ground Switch•Isolator•Current Transformer•Circuit Breaker•Surge Divertor
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S No Name Rating Quantity
1 Transformer 66/11 KV 4
2 Transformer 132/11 KV 1
3 Transformer 11/.4 KV 4
4 Transformer 132/66 KV 1
5 Transformer 66/33 KV 1
6 Potential Transformer - 8
7 Current Transformer - 12
8 Circuit Breaker Varying 10
9 Isolator - 61
10 Lightening Arrestor - 16
11 Surge Diverter - 5
12 Unit Auxiliary Transformer 11/6.6 KV 2
13 Station Transformer 66/6.6 KV 1
Number of Equipments Used
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References: •NITK 33/11 kV substation key diagram.
•Power system engineering by Soni,Gupta,Bhatnagar,hakrawarti.
•Power system protection and Switchgear by Badriram.
•Generation of electrical energy by B.R.Gupta.
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