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I don't think that your OPF converged at all, and you are obtaining
bogus values. Your system data is unusual in at least the following ways (there may be more issues with it): 1) It is extremely connected, with just 21 buses yet 111 branches. Is this some kind of extreme reduction? -- way, I take that back, a spy plot of Bdc doesn't seem that full.... but then you probably have many parallel branches? 2) Two of your branches (64, 111) have extremely small line series reactance values (0.000041 and 0.000009), which in turn make... 3) the Bdc matrix to be extremely ill-conditioned, with a maximum singular value of 2e+05 and with the three smallest singular values being 4.14e-13, 1.4e-14 and 9.6e-31 . Now, one expects to have one singular value equal to zero in any Bdc matrix, but not three. It seems to me that buses 2 and 18 connected through branch 64, and buses 16 and 17 connected through branch 111, are candidates for collapsing into a single bus. Carlos. Jorge Sierra wrote:
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