When running a simple power flow, the slack bus must provide *all* of the power needed make up the difference between the load+losses and the sum of the other generators. It cannot be restricted without changing the other generator dispatches, but then it isn't a simple power flow problem anymore, but rather some sort of re-dispatch problem (of which an OPF is one kind).
So in MATPOWER the PMAX column of the gen table is only used for OPF problems. -- Ray Zimmerman Senior Research Associate 419A Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645 On Feb 16, 2012, at 4:35 PM, iman wrote: > Dear all, > > > > Supposedly DNO doesn’t allow us to import more than 30 MW from the network > (and if we do we would be charged), is there any way to limit the power > coming from the slack up to 30 MW ? > > I can see that there is a maximum real power output (MW) designated in > column 9 of Generator Data (mpc.gen); however when I increase the load by > running pf I can see P Generation from bus 1 is 127 MW ,no matter what the > value of “maximum real power output” is. > > How can I solve this problem? > > > -- > Best regards > Iman >
