1. MATPOWER considers the active and reactive power injections as two independent optimization variables. The power factor is simply a function of these two, so I would say that it is equivalent to have both active power and power factor angle as optimization variables, though that is not how it is implemented explicitly.
2. I don't remember the context of the reply you refer to, but if I understand correctly, I believe there are contexts in which you are correct. -- Ray Zimmerman Senior Research Associate 419A Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645 On Feb 9, 2012, at 12:57 PM, Silvio Miceli wrote: > Dear Ray, > > 1. Can I say MATPOWER's OPF considers the power factor angle of generators as > optimization variable? If not, how can I consider as optimization variable? > > 2. Also, according to one of your replies to a post with regards to > considering the slack bus voltage as optimization variable, why you want to > implement OLTC in MATPOWER? In my idea, considering the slack bus as > optimization variable is equal to have an OLTC and consequently considering > the secondary voltage as optimization variable. Because usually the OLTC is > used in order to control the voltage of slack bus and in MATPOWER is already > considered as optimization variable. If I am not right, please let me know? > > Best Wishes > > Silvio > > > > On Wed, Feb 8, 2012 at 17:47, Ray Zimmerman <[email protected]> wrote: > On Feb 8, 2012, at 10:01 AM, Silvio Miceli wrote: > >> 1. What kind of generator has been taken into account in MATPOWER in Section >> 5.4.3 of MANUAL in order to consider the capability curve? > > It is simply intended to be a piecewise linear approximation to the kind of > capability curve exhibited by many types of conventional generators, such as > this one from Figure 2 in [1]. > >> 2. I want to minimize losses instead of maximizing social welfare >> considering offers and bids. How can I do it in MATPOWER? > > The answer to this one is readily available in the list archives ... e.g. > http://www.mail-archive.com/[email protected]/msg00817.html > >> 3. How can I maximize profit for generators in MATPOWER instead of >> maximizing Social welfare? >> Also, by which formula I can obtain profits (for generators), revenue and >> cost in MATPOWER? Could you please address it? > > I'm not aware of a method to maximize profits, since that would involve an > objective that is a function of price, a very unconventional type of > optimization problem. You can compute revenue directly as the product of > quantity and price, and the cost is available in the dispatch matrix returned > by runmarket. See help idx_disp for a description of each column of the > dispatch matrix. > > - Ray > > [1] > http://www.hydroworld.com/index/display/article-display/353952/articles/hydro-review/volume-28/issue-2/feature-articles/system-protection/coordinating-generator-protection-and-controls-an-overview.html > > -- > Ray Zimmerman > Senior Research Associate > 419A Warren Hall, Cornell University, Ithaca, NY 14853 > phone: (607) 255-9645 > > >
