I executed the AC OPF on a real power system. There are 52 power units in this
network considered as P-V buses. when the OPF is run, the active outputs of
some of them are zero, because they have higher cost of production. In other
words, they are shot down. But I face with a wonderful problem. The generators
with zero active production still produce reactive power, however in realistic
when a generator is shot down it can not also produce reactive power in
addition of active power.
Why this happen in matpower and how I can solve this?
Morteza Rahimiyan
