Exactly, under the heading "Generator capability curves". The usual
synchronous generator capability curves look more like the pictures in
that section of the manual. But you can also model a truncated cone
(corresponding to limits on power factor dispatch) using the same
parameters.
carlos.
Richard Ngonga wrote:
Thank you Carlos, is this the one refered to on section 5.4.3 of the
Matpower user manual(trapezoidal modelling)
> Date: Mon, 20 Aug 2012 12:23:10 -0400
> From: [email protected]
> To: [email protected]
> Subject: Re: PV Generators and Transformer modelling
>
> So, if the reactive dispatch of your generators is constrained to be
> within a 0.95 power factor, then you can use MATPOWER's trapezoidal
> modeling of the (P,Q) feasible region. as opposed to simple bound
> constraints on P and Q
> for a generator. In your case, if Pmin reaches down to 0, then you have
> more of a cone instead of a trapezoid.
> This is best explained using a picture; see manual for details.
>
> carlos.
>
> Richard Ngonga wrote:
> > Thanks for that, I mean photo voltaic. I am modelling PV generators
> > that are able to dispatch reactive power(i.e operating at -0.95 to
> > 0.95 power factor).
> >
> >
> > > Date: Mon, 20 Aug 2012 01:34:09 -0400
> > > From: [email protected]
> > > To: [email protected]
> > > Subject: Re: PV Generators and Transformer modelling
> > >
> > > Um, an unfortunate crisscross with acronyms... by PV generators
do you
> > > mean power-voltage as in classical power flow problem parlance
or do
> > you
> > > rather mean "photo voltaic"?
> > >
> > > Richard Ngonga wrote:
> > > >
> > > > Hi there,
> > > >
> > > > I am working on a thesis on reactive power control on a
distributed
> > > > network with transformers and PV generators. Can I model the
PVs as
> > > > generators on a PV bus or should I model them as capacitors on
a PQ
> > > > bus? I'm also having problems modelling transformers from a 20KV
> > > > network to a 0.4KV network; when I use the transformer ration
50 I
> > get
> > > > very large power flows and losses. The transformer data is: Sn
> > 400KVA,
> > > > Usc=10%, Uprm/Usec=20/0.4(KV) and Usec set=1.05.
> > > >
> > > > Regards
> > >
> > >
>
>
