Dear Mr. Todorovski, thanks for the answer!
________________________________ De: [email protected] <[email protected]> em nome de Mirko Todorovski <[email protected]> Enviado: quinta-feira, 29 de junho de 2017 21:10 Para: MATPOWER discussion forum; [email protected] Assunto: Re: Power Flow for Radial Test Systems with several Feeders Case B can't be solved with PQSUM, ISUM or YSUM since there are three slack buses. There must be only one slack (supply) bus for the distribution network. Case A can be solved but you should put branches 1-2 and 1-3. Their parameters may all be zero (r, x and b). However, bear in mind the zero-impedance branches are problematic for the Netwon method. Finally, do you include tie branches 5-11, 10-14 and 7-16? If yes, the network consists loops and can't be solved with the current version of PQSUM, ISUM or YSUM. Best regards, Mirko On 06/29/2017 03:47 PM, Andrey Vieira wrote: Hi All. With regard to the use of load flow for radial networks, I would like to know if there is for distribution systems with several separately represented radial feeders. That is, each one With their respective sources (substations). For example, note the case 16 buses below [cid:[email protected]] This case can be represented in MATPOWER in two different ways, as below: A) % bus_i type ... mpc.bus = [ 1 3 ... 2 1 ... 3 1 ... 4 1 ... 5 1 ... 6 1 ... 7 1 ... 8 1 ... 9 1 ... 10 1 ... 11 1 ... 12 1 ... 13 1 ... 14 1 ...]; B) % bus_i type ... mpc.bus = [ 1 3 ... 2 3 ... 3 3 ... 4 1 ... 5 1 ... 6 1 ... 7 1 ... 8 1 ... 9 1 ... 10 1 ... 11 1 ... 12 1 ... 13 1 ... 14 1 ... 15 1 ... 16 1 ...]; When carrying out the load flow for the two cases (A and B), success was obtained for the two cases by Newton's method. However, for the PSUM, ISUM, and YSUM methods, none of them were successful. Can anyone tell me if there is the possibility of running the load flow for distribution systems Radials that use the representation of a substation for each feeder?
