400 MW 80 MW 40 MW с D Figure P6.5 Three-bus power system for Problems 6.5 to 6.9 and 6.12 to 6.17 Marginal cost Generator Capacity (MW) (S/MWh) A 150 12 B 200 15 C 150 10 D 400 6.6 The table below gives the branch data for the three-bus power system of Prob- lem 6.5. Using the superposition principle, calculate the flow that would result if the generating units were dispatched as calculated in Problem 6.5. Identify all the violations of security constraints. Branch Reactance Capacity (pu) (MW) 1-2 0.2 250 1-3 0.3 250 2-3 0.3 250 6.7 Determine two ways of removing the constraint violations that you identified in Problem 6.6 by redispatching generating units. Which redispatch is preferable? 6.8 Calculate the nodal prices for the three-bus power system of Problems 6.5 and 6.6 when the generating units have been optimally redispatched to relieve the constraint violations identified in Problem 6.7. Calculate the merchandising sur- plus and show that it is equal to the sum of the surpluses of each line. 6.9 Consider the three-bus power system described in Problems 6.5 and 6.6. Suppose that the capacity of branch 1-2 is reduced to 140 MW while the capacity of the 204 6 TRANSMISSION NETWORKS AND ELECTRICITY MARKETS other lines remains unchanged. Calculate the optimal dispatch and the nodal prices for these conditions. (Hint: the optimal solution involves a redispatch of generating units at all three buses)
400 MW 80 MW 40 MW с D Figure P6.5 Three-bus power system for Problems 6.5 to 6.9 and 6.12 to 6.17 Marginal cost Generator Capacity (MW) (S/MWh) A 150 12 B 200 15 C 150 10 D 400 6.6 The table below gives the branch data for the three-bus power system of Prob- lem 6.5. Using the superposition principle, calculate the flow that would result if the generating units were dispatched as calculated in Problem 6.5. Identify all the violations of security constraints. Branch Reactance Capacity (pu) (MW) 1-2 0.2 250 1-3 0.3 250 2-3 0.3 250 6.7 Determine two ways of removing the constraint violations that you identified in Problem 6.6 by redispatching generating units. Which redispatch is preferable? 6.8 Calculate the nodal prices for the three-bus power system of Problems 6.5 and 6.6 when the generating units have been optimally redispatched to relieve the constraint violations identified in Problem 6.7. Calculate the merchandising sur- plus and show that it is equal to the sum of the surpluses of each line. 6.9 Consider the three-bus power system described in Problems 6.5 and 6.6. Suppose that the capacity of branch 1-2 is reduced to 140 MW while the capacity of the 204 6 TRANSMISSION NETWORKS AND ELECTRICITY MARKETS other lines remains unchanged. Calculate the optimal dispatch and the nodal prices for these conditions. (Hint: the optimal solution involves a redispatch of generating units at all three buses)
Chapter4: Economic Evaluation In Health Care
Section: Chapter Questions
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Transcribed Image Text:400 MW
80 MW
40 MW
с
D
Figure P6.5 Three-bus power system for Problems 6.5 to 6.9 and 6.12 to 6.17
Marginal cost
Generator Capacity
(MW)
(S/MWh)
A
150
12
B
200
15
C
150
10
D
400
6.6 The table below gives the branch data for the three-bus power system of Prob-
lem 6.5. Using the superposition principle, calculate the flow that would result
if the generating units were dispatched as calculated in Problem 6.5. Identify
all the violations of security constraints.
Branch
Reactance
Capacity
(pu)
(MW)
1-2
0.2
250
1-3
0.3
250
2-3
0.3
250
6.7 Determine two ways of removing the constraint violations that you identified in
Problem 6.6 by redispatching generating units. Which redispatch is preferable?
6.8 Calculate the nodal prices for the three-bus power system of Problems 6.5 and
6.6 when the generating units have been optimally redispatched to relieve the
constraint violations identified in Problem 6.7. Calculate the merchandising sur-
plus and show that it is equal to the sum of the surpluses of each line.
6.9 Consider the three-bus power system described in Problems 6.5 and 6.6. Suppose
that the capacity of branch 1-2 is reduced to 140 MW while the capacity of the
204
6 TRANSMISSION NETWORKS AND ELECTRICITY MARKETS
other lines remains unchanged. Calculate the optimal dispatch and the nodal
prices for these conditions. (Hint: the optimal solution involves a redispatch of
generating units at all three buses)
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