The real power loss in branch k can be computed as ... Ploss = results.branch(k, PF) + results.branch(k, PT)
Also, I just noticed my previous response had an error in it. The voltage angles used to compute Vf and Vt need to be multiplied by pi/180 to convert from degrees to radians. -- Ray Zimmerman Senior Research Associate B30 Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645 On Oct 2, 2013, at 2:18 AM, Muhammad Buhari <[email protected]> wrote: > Hi, > > Pls can you help me with an advice on the best method to compute the branch > losses using matpower > > Thanks for your continued assisstance. > > Regards > > Muhammad Buhari > > PhD student > > Electrical Energy and Power Systems Research group, > > University of Manchester, UK > > From: [email protected] > [[email protected]] on behalf of Ray Zimmerman > [[email protected]] > Sent: 30 September 2013 8:22 PM > To: MATPOWER discussion forum > Subject: Re: Branch Currents in matpower 4.1 > > For branch k, connecting bus f to bus t, you can calculate them directly from > the bus voltages and branch powers. > > Sf = results.branch(k, PF) + 1j * results.branch(k, QF); > St = results.branch(k, PT) + 1j * results.branch(k, QT); > Vf = results.bus(f, VM) * exp(1j * results.bus(f, VA)); > Vt = results.bus(t, VM) * exp(1j * results.bus(t, VA)); > If = conj( Sf / Vf ); > %% complex current injected into branch k at bus f > It = conj( St / Vt ); > %% complex current injected into branch k at bus t > > > -- > Ray Zimmerman > Senior Research Associate > B30 Warren Hall, Cornell University, Ithaca, NY 14853 > phone: (607) 255-9645 > > > On Sep 28, 2013, at 11:24 AM, Jiashen Teh <[email protected]> > wrote: > >> Hi >> >> I would like to know the method to calculate correctly the branch currents >> from the matpower results. >> >> Regards >> >> >> Yours sincerely, >> >> Jiashen Teh >> PhD Student >> Electrical Energy & Power Systems Group, School of Electrical & Electronic >> Engineering >> Ferranti Building (B18), The University of Manchester, M13 9PL, United >> Kingdom >> Tel: +44 (0) 161 306 2263; Mobile: +44 (0) 792 322 4864 >> From: Muhammad Buhari >> Sent: 28 September 2013 16:19 >> To: Jiashen Teh >> Subject: Branch Currents in matpower 4.1 >> >> Hi, >> >> Please can you help me with the method to calculate correctly the branch >> currents from the matpower results. >> >> Regards >> >> Muhammad Buhari >> >> PhD student >> >> Electrical Energy and Power Systems Research group, >> >> University of Manchester, UK >> > >
