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 This case can be represented in MATPOWER in two different ways,
as below: A)
%bus_itype...
mpc.bus = [ 13 ... 2 1 ... 3 1 ...41 ...5 1...6 1...
7 1...
81...9 1... 10 1... 11 1... 12 1... 13 1... 14 1 ...];
B)
%bus_itype...
mpc.bus = [ 13 ... 2 3 ... 3 3 ...41 ...5 1...6 1...
7 1...
81...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?
