PROBLEMS 465 shown meters 9.3 You are given in the following network with at loc

Question

PROBLEMS 465 shown meters 9.3 You are given in the following network with at locations as in Figure 9.25. Load 2 Load 1 - us 2 Bus 1 M13 M 12 Bus 4 (Reference) Bus 3 FIGURE 9.25 Four-bus system with measurements for Problem 9.3. Branch Impedances (pu) X=0.25 X=0.50 X=0.40 X=0.10 Measurement Errors Measurement Values M =-.70.5 M, = 72. 1 M=21.2 o, = 0.01 o, = 0.01 0.02 o, = a. Is this network observable? Set up the least-squares equations and try to invert (HR 'H). b. Suppose we had a measurement of generation output at bus 3 and included it in our measurement set. Let this measurement be the following: M, = 92 MW with o= 0.015 3gen 4 Repeat part a including this measurement. the to be Given the network shown in Figure 9.26, network is modele with a DC power flow with line reactances as follows (assume 100MV base):

Explanation / Answer

a) this network is observable

inversion of above matrix gives 3

b) generation at bus 3

output will be 45

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