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Actually, if it is just a linear cost
on the absolute value of the reactive output of a generator, you
can define a "V"-shaped piecewise linear cost for it using the
standard piecewise linear cost capability.
carlos.
Ray Zimmerman wrote:
Adding another ng
rows to the gencost matrix
will apply a cost to the reactive power, but not to the absolute
value of the reactive power. And the User-defined Costs as
described in Sections 6.3.1 of the MATPOWER 6 User’s Manual doesn’t
help you here, though you could apply a quadratic cost, if that
would work for you.
However, if it needs to be a linear cost on the
absolute value, I think you’re going to have to use the general
non-linear cost capabilities in the current development version
of MATPOWER on GitHub. They are described in Sections 6.3.3 and
7.2.2 in the new manual.
if you have more questions along the way, don’t
hesitate to ask.
Ray
I am trying to set up an OPF problem where
the objective function consists of
- active power generation (Pg*cp, where Pg is generation
and cp is cost)
- reactive power generation (|Qg|*cq, where Qg is
reactive generation and cq is cost)
How do I get the absolute values for Qg into the
objective function? Is there a way to hard-code the
objective or is there a workaround that will end up
charging the absolute values?
Thanks for any hints.
Best regards, Steffi
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