Thank you, Carlos!
> Date: Tue, 21 Aug 2012 01:01:56 -0400
> From: [email protected]
> To: [email protected]
> CC: [email protected]
> Subject: Re: PV Generators and Transformer modelling
>
> 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
> > > > >
> > > > >
> > >
> > >
>
>
