Dear Alireza SalimAmini
Thank you for your care and blessing. I think I have implemented this using
runuopf(), a built-in function of matpower to do mixed unit commitment and OPF.
In such cases where geneators are used to model shunt capacitors and reactors,
just add a few generators whose real power generation Pg is zero and reactive
power generation Qg set at a constant value. The Qmax and Qmin in generator
data has to be identical with the set Qg. Notably, the Pmax and Pmin cannot be
set to zero because runuopf() will merely deal with generators whose Pmin is
greater than zero (see source codes of uopf() ). To get "shunt" generators
involved as candidates of unit commitment programming only calls for Pmin and
Pmax set at a very small number numerically, say, 1e-6 and 1e-5. This minor
active power injection will hardly affect the power flow but can get "shunt"
generators involved.
------------------ ???????? ------------------
??????:
"MATPOWER discussion forum"
<[email protected]>;
????????: 2020??9??9??(??????) ????2:22
??????: "MATPOWER discussion forum"<[email protected]>;
????: Re: optimal power flow with unit commitment using mixed integer
programming
hi i wish u are healthy at this conditions( Covid19)
i think if you adjust Qmin and Qmax of capacitors at 'gen' matrix equal to
6Mvar, it will help , and you can use status ( it is a column in gen
matrix as came below) of that capacitor a variable for reactive
power balance.
'8 GEN_STATUS status, > 0 - in service, <= 0 - out of service'
On Wed, Sep 9, 2020 at 6:34 AM yangyang <[email protected]> wrote:
Dear all,
I am working on optimal power flow whose objective is the cost of generation
plus the quadratic deviation of voltage magnitudes to 1.0. The special
part of the optimization lies in it that it has to include shunt capacitors and
reactors in this network apart from conventional generators, which can control
reactive power and voltages. In this network, the capacitors and reactors are
modelled as discrete constant reactive power loads, whose values are like 0,
-6MVar, -12MVar, -18MVar, etc. I think a practical implementation is to
take these shunt capacitors as a bunch of generators whose active power
generation is set to 0 and reactive power generation set to constant values.
Say, a chain of 6*6MVar shunt capacitors at one bus can be viewed as 6
generators at this bus whose active gen is 0 and reactive gen is 6MVar. On my
opinion, these shunt capacitor or reactor generators should not change their
active and reactive generation in OPF but only decide which generators should
be on, just like unit commitment, while other conventional generators will
change their active and reactive generation continously as conventional OPF. I
dont know if it is practical using matpower. Despite the miqps_matpower
function and the new-released mp-opt-model, it seems that no one has done so
ever. Would you please help me with it? Thank you for you kind patience and
consideration.
