Assignment/1: Example 1 A generating station has a connected load of 40 MW and a maximum demand of 20 MW : the units generated being 60 x 106 Calculate (i) the demand factor (ii) the load factor. [) 0-5 (ii) 34.25% Example 2 generating station supplies the following loads : 15000 kW, 12000 kW, 8500 kW, 6000 kW and 450 kW. The station has a maximum demand of 22000 kW. The annual load factor of the station is 48%. Calculate (i) the number of units supplied annually (ii) the diversity factor and (iii) the demand factor. 16) 925 105 kWh (ii) 52.4% (iii) 1.91 Example 3 The annual load duration curve of a certain power station can be considered as a straight line from 20 MW to 4 MW. To meet this load, three turbine-generator units, two rated at 10 MW each and one rated at 5 MW are installed. Determine (i) installed capacity (ii) plant factor (iii) units generated per annum (iv) load factor and (v) utilization factor. (1) 25 MW (ii) 48% (iii) 105.12 106 kWh (iv) 60% (v) 80%. Example 4 A proposed station has the following daily load cycle : Time in hours 68 811 1116 16191922 2224 246 Load in MW 20 40 50 35 70 40 20 Draw the load curve and select suitable generator units from the 10,000, 20,000, 25,000, 30,000 kVA. Prepare the operation schedule for the machines selected and determine the load factor from the curve. 155.06%