Every network model has a limited load that it can support before reaching voltage collapse. Obviously, there is no single right answer to your question about how to scale loads in a test case like the IEEE 14-bus case. My recommendation would be to scale your daily profile so that the peak equals 1 (this assumes the existing loads represent a peak loading condition). Then use that normalized profile to scale the existing loads uniformly. There is no problem with including load at the slack bus.
-- Ray Zimmerman Senior Research Associate B30 Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645 On Oct 14, 2013, at 3:19 PM, Yahook K <[email protected]> wrote: > Dear all, > > Is there a limitation for the system load (the sum of the load of all the > buses) in the matpower? I have a power system daily load profile in a 15 min > resolution. I want to scale it down to use in ieee 14 bus case. > > First, how can I scale it down? Is there a limitation for the system load? > Second, how to distribute the system load among 14 buses? I think I can not > specify load for the slack bus at the begining, so the load for bus 1 is > zero; the load for the other 13 buses can be randomly distributed, as long as > the sum of all the load equal to the system load. Am I right? > > > %% bus data > % bus_i type Pd Qd Gs Bs area Vm Va baseKV > zone Vmax Vmin > mpc.bus = [ > 1 3 0 0 0 0 1 1.06 0 0 1 1.06 0.94; > 2 2 21.7 12.7 0 0 1 1.045 -4.98 0 1 1.06 > 0.94; > 3 2 94.2 19 0 0 1 1.01 -12.72 0 1 1.06 > 0.94; > 4 1 47.8 -3.9 0 0 1 1.019 -10.33 0 1 > 1.06 0.94; > 5 1 7.6 1.6 0 0 1 1.02 -8.78 0 1 1.06 > 0.94; > 6 2 11.2 7.5 0 0 1 1.07 -14.22 0 1 1.06 > 0.94; > 7 1 0 0 0 0 1 1.062 -13.37 0 1 1.06 > 0.94; > 8 2 0 0 0 0 1 1.09 -13.36 0 1 1.06 > 0.94; > 9 1 29.5 16.6 0 19 1 1.056 -14.94 0 1 > 1.06 0.94; > 10 1 9 5.8 0 0 1 1.051 -15.1 0 1 1.06 > 0.94; > 11 1 3.5 1.8 0 0 1 1.057 -14.79 0 1 1.06 > 0.94; > 12 1 6.1 1.6 0 0 1 1.055 -15.07 0 1 1.06 > 0.94; > 13 1 13.5 5.8 0 0 1 1.05 -15.16 0 1 1.06 > 0.94; > 14 1 14.9 5 0 0 1 1.036 -16.04 0 1 1.06 > 0.94; > ];
