Ok, so you are seeing some load being curtailed when you expected that none of it would be? I can think of two possible reasons …
(1) there are network constraints (branch flow limits) that do not allow all of the load to be served, or (2) the value of the load does not exceed the cost of the generation required to serve it. You can check the first by trying a case with no line constraints (mpc.branch(:, RATE_A) = 0) to see if that eliminates the curtailment. And you can verify the second by double-checking your generator and load “costs” in the gencost matrix. If you are using a very high price for the loads, you should also see a corresponding price at any buses where curtailment is happing. Ray > On May 6, 2015, at 11:07 AM, Carlos Cruzat Hermosilla <[email protected]> > wrote: > > Hi > > Well I am not having trouble specifying the loads as dispatchable. However > as can you see from the System Summary just 1025.5 of 2296.2 [MW], which is > the total load is dispatchable, so a few loads are dispatched at values less > than their nominal value. > > I hope this could clarify my question. > > Thanks > Carlos > > > ================================================================================ > | System Summary > | > ================================================================================ > > How many? How much? P (MW) Q (MVAr) > --------------------- ------------------- ------------- ----------------- > Buses 24 Total Gen Capacity 5107.5 -535.0 to 2664.0 > Generators 33 On-line Capacity 5107.5 -535.0 to 2664.0 > Committed Gens 33 Generation (actual) 1036.0 -124.1 > Loads 17 Load 1025.5 208.5 > Fixed 0 Fixed 0.0 0.0 > Dispatchable 17 Dispatchable 1025.5 of 2296.2 208.5 > Shunts 1 Shunt (inj) -0.0 -108.4 > Branches 38 Losses (I^2 * Z) 10.53 96.82 > Transformers 5 Branch Charging (inj) - 537.7 > Inter-ties 10 Total Inter-tie Flow 602.1 267.0 > Areas 4 > > 2015-05-06 15:54 GMT+01:00 Ray Zimmerman <[email protected] > <mailto:[email protected]>>: > We will need more information. What do you mean by “one part of the load > becomes dispatchable”? Are you saying that you are having trouble specifying > your loads as dispatchable or that only a few loads are dispatched at values > less than their nominal value? Or that the loads that are curtailed are only > partially curtailed? > > We need to know what specifically you expected to see and how your result > differs from that. > > Ray > > > > On May 6, 2015, at 10:11 AM, Carlos Cruzat Hermosilla <[email protected] > > <mailto:[email protected]>> wrote: > > > > Hi All > > > > I am currently working with dispatchable loads in order to see the impact > > of overloading the lines of the network. However when I run OPF just one > > part of the total load becomes dispatchable which obviously affects my > > results, so Does anybody knows what could be the reason? > > > > Thanks, > > Carlos > > > > PD: The generation and lines capacities are enough to provide the required > > energy. > > > >
