Hi,
@ Jose L. Marin:
I used a generator in both cases, hence it should be the correct sign
(should result in the same I guess). Anyway P was very small, around
1e-6 MW.
I'm not sure if I've modelled something wrong: S_base is 100, my
generator is at bus 1 (at the end zeros(1,12)):
bus
Those are certainly some crazy Mvar injections! Just checking: are you
sure you reversed the signs of P properly when switching the type of that
bus from PQ (load) to PV (gen with neg real power), also taking care of
making the corresponding changes in the bus row and adding a new gen row?
If
Ray's suggestion is an excellent idea. I'd like to add the following.
Suppose you start with "caseA", which solves ok. Now you make only one
change to obtain "caseB": you switch one particular PQ bus to PV type, by
carefully specifying its Vg as the voltage value you obtained in the
solution of
It sounds like the voltage at that bus may be very sensitive to the reactive
power injection. One thing you might try to get some idea of this is to change
that bus back to PQ with the reactive at the lower limit, then try running a
few cases with slightly perturbed values of the reactive power
Hi,
I'm using Matpower (v5.0b1, but the same holds for v5.1) for a 220 kV/110
kV/20 kV-grid quite a while. The grid has 1 reference bus (220 kV), 2
PV-buses (220 kV) and >100 PQ-buses (110 kV & 20 kV). So far calculating
the grid using runpf with Newton has never been a problem.
Now I've tried
