Since the branch parameters are expressed in p.u. they must be modified along with baseKV in order for them to represent the same physical parameters. As it turns out, when the impedance parameters and voltages are expressed in p.u. (as they are in MATPOWER), there is no effect whatsoever of changing baseKV of a bus. It is in fact, not needed at all for the power flow calculations. It's only relevance is as relates to converting p.u. impedances and voltages back to physical parameters.
-- Ray Zimmerman Senior Research Associate 419A Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645 On Apr 18, 2013, at 3:27 PM, Hedayat Saboori <[email protected]> wrote: > Dear all > I'm about to evaluate the effect of line nominal voltage on line losses. I > simply increase line connected bus voltages, run power flow, and calculate > losses. But, in spite of increasing voltage loss is constant in all cases. I > have developed a simple code for a 2 bus network. M-files are attached. What > is the problem? does nominal voltage change any thing? > <case2.m><lineloss.m>
