Assuming that you want to specify a reactive dispatch capability within the .9 power factor cone that we talked about earlier, and assuming Pmin = 0 and Pmax = 1MW, then at Pmax the reactive dispatch could be in [-0.4843, 0.4843] MVAr. Then, the following parameters define that cone for Matpower:
Pmin = 0 Pmax = 0 Qmax = 0.4843 Qmin = -0.4843 Pc1 = 0 Qc1min = 0 Qc1max = 0 Pc2 = 1 Qc2min = -0.4843 Qc2max = 0.4843 On Thu, Aug 30, 2012 at 4:56 PM, Richard Ngonga <[email protected]> wrote: > > Hi Carlos, > > Do I have to model photovoltaic generators in matpower like diesel > generators? My aim is to model photovoltaic inverters as dispatchable > reactive power sources using Matpower's trapezidal modeling of the (P,Q) > feasible region. What is the best way to model them in matpower? > > Regards > > Richard > >> 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 >> > > >> > > >> >>
