Calculation of power generation cost of Thermal power plants & Co-generation plants

Power generation cost: It is the amount of rupees spent on generation of 1 unit of power

Power export cost: It is the amount of rupees spent on export of 1 unit of power

Generally power generation actual cost is the sum of Fuel cost, man power cost, operation & maintenance costs administration cost, river water cost, plant gardening & vehicles cost  etc

Power generation & Export cost in Thermal power plants:

Part A:Fixed data

• Total power generation in KWH = A1

• Total power export KWH = A2

• Total fuel consumed = A3

• Rate of per ton of fuel in = A4

• Raw water consumption per day in MT or M3 = A5

• Rate of per ton or   of river water in  = A6

• Rate of per unit power for lifting water from source to Reservoir Rs= A7

Calculation of power generation in steam Turbines

Part B:

Operation cost head wise

• Cost of fuel in Rs B1= A3 X A4

• Cost of raw water in Rs B2 = A5 X A6

• Cost of chemicals consumed for water treatment = B3

• Cost of fuel feeding in =B4

• Cost of raw water lifting charges from river to reservoir= B5

Total operation cost C = B1 + B2 +B3 + B4 + B5

Power generation phenomenon in STG

Part C:

Maintenance cost head wise

• Cost of spares,consumables consumed  = C1

• Cost of Lubricants = C2

• Cost of store inventory= C3

• Tools tackles testing cost = C4

• Measuring instruments calibration cost = C5

Total maintenance cost C = C1 +C2 + C3 + C4 + C5

Part D :

Administration cost head wise

• Cost of  O &M man power salary = D1
• 
  
• Cost of site expenditures =  D2
• 
  
• Cost of gardening labours salary =D3
• 
  
• Cost of Security guards salary = D4
• 
  
• Cost of transportation vehicles =D5

Total administration cost = D = D1 + D2 + D3 + D4 + D5

• Total Cost of production, E = B + C + D
•  
• Power generation cost per unit =A1/E....Rupees/KWh or Dollars/Kwh
• 
  
• Power export cost per unit = A2/E.....Rupees/KWh or Dollars/Kwh

Note:

1-In calculation power generation cost, power consumed for plant auxiliary running should not be considered

2-In co-generation plants:

• Cost of power given to process plants should be considered
• Cost of process steam given should be considered for power generation cost calculation

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