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GridMod / RTS-GMLC

Reliability Test System - Grid Modernization Lab Consortium
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Same LMP values at all buses for DCOPF #31

Closed krishnakanaparthi closed 7 years ago

krishnakanaparthi commented 7 years ago

When DC OPF is run on the RTS data (using the RTS.m file), the LMP values obtained at all the buses are the same. But AC OPF gives different LMPs at the buses. This might not be an issue but an observation regarding the data set.

claytonpbarrows commented 7 years ago

are you using MATPOWER?

krishnakanaparthi commented 7 years ago

Yes, I used MATPOWER with GLPK solver. Also was the same with the initial formulation in Python with GLPK implementation.

claytonpbarrows commented 7 years ago

With all generators committed, the DCOPF doesn't have any binding transmission constraints, therefore the LMP values will all be the same. If you can optimize the unit commitment, you will find periods where transmission constraints are binding and LMP values are not uniform.

krishnakanaparthi commented 7 years ago

Thank you, I agree. The unit commitment information available should address this issue.