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Engineering · Electrical Engineering
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Consider a three-bus power system shown in Figure 2. Table 5 shows the capacity and marginal energy costs for the four generating units connected to this system 400 MW 80 MW Figure 2 Table 5 CapacityMarginal cost of energy Generator £/MWh 15 150 250 150 400 10 (a) Calculate the unconstrained economic dispatch, the nodal prices for the loading condition, and the total generation cost for meeting the demand (b) Table 6 gives the branch data for the three-bus power system. By using the superposition principle, calculate all branch flows if the generating units are dispatched as that calculated in (a). Identify all violations that exceed the capacity of the three branches Table 6 Reactance Capacity Branch 1-2 1-3 2-3 0.3 0.2 0.5 300 300 300 (c) Remove the violations identified in (b) by increasing the output of generating unit A at bus 2. Quantify the extra generation cost incurred by this re-dispatch. Use a diagram to illustrate the new energy flows along the three branches and the new generation outputs

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