Sure, good idea. Basicly, at first, I just want to confirm that, P is used by norminal value, but not p.u. I am using the foudation of matpower and fmincon for optimization. Thank you Dr. Zimmerman.
Regards, Yurong 2010/5/25 Ray Zimmerman <[email protected]> > On further thought, the units of the objective function are in $/hr, so > that means the units of b would be $/MWh. > > Ray > > > On May 25, 2010, at 10:31 AM, Ray Zimmerman wrote: > > 1) Units of b are $/MW (or $/MVAr). > 2) P values are in MW (or MVAr). > > I will clarify this in the documentation for the next release. > > -- > Ray Zimmerman > Senior Research Associate > 211 Warren Hall, Cornell University, Ithaca, NY 14853 > phone: (607) 255-9645 > > > > On May 25, 2010, at 9:01 AM, 王玉荣 wrote: > > Thank you. > > I agree with you both, and in fact, I changed the data based on the gencost > matrix. But I have two more questions: > 1) what are the units of this parameters? such like $/MW or M$/MW for b ? > because I also want to know the cost of Var devices and moreover, I need to > put these in my research, so I think I need to make sure these parameters > are compatible. > 2)I want to double check with you: when using f=a*P^2+b*P+c, the P values > are norminal value or p.u.? I used norminal value. > > Thanks. > > > > On Mon, May 24, 2010 at 10:46 PM, Ray Zimmerman <[email protected]> wrote: > >> I would just caution you that, just because you find a case file with a >> particular set of cost coefficients does not mean that those cost >> coefficients are in any sense "typical" generator costs. In many cases, they >> are more likely some random numbers that someone typed in so they could run >> an OPF. >> >> -- >> Ray Zimmerman >> Senior Research Associate >> 211 Warren Hall, Cornell University, Ithaca, NY 14853 >> phone: (607) 255-9645 >> >> >> >> On May 24, 2010, at 8:38 PM, m d wrote: >> >> Hello, >> I have just got familiar with Matpower too but as much as I know in every >> casedata there is a part namely: generator cost data that you can find the >> relevant cost coefficients. >> for example type: open case9 >> then in case9.m file at the end of the page in the generator cost data >> there is a matrix: mpc.gencost with >> 7 columns...the last three columns are the coefficients that you need. >> should you need more details, just simply type : 'help caseformat ' and you >> will find good information. >> hope it helps >> >> >> ------------------------------ >> *From:* 王玉荣 <[email protected]> >> *To:* [email protected] >> *Sent:* Sun, May 23, 2010 2:50:53 PM >> *Subject:* some coefficients >> >> Hi All, >> >> I am doing optimal research recently, and I badly need some coefficients >> related to the generation cost and some VAr devices cost. >> >> Specifically, >> the generation cost is like this: f=a*P^2+b*P+c, where the P is the active >> power output. The coefficients are a,b,c. >> For the Var devices cost, I hope the cost is composed by >> f=C_fix+C_variable*Qc, where Qc is the output reative power of the Var >> device. And the coefficients are C_fix and C_variable. >> >> Does anybody have some reference data please? Thank you so much. >> >> Regards, >> Yurong >> >> -- >> 王玉荣 (Yurong WANG) >> Dept. of EECS, the University of Tennessee >> Knoxville, TN37996, USA >> >> School of Electrical Engineering >> Southeast University, Nanjing, China 210096 >> >> We Will Progress. >> >> >> >> > > > -- > 王玉荣 (Yurong WANG) > Dept. of EECS, the University of Tennessee > Knoxville, TN37996, USA > > School of Electrical Engineering > Southeast University, Nanjing, China 210096 > > We Will Progress. > > > > -- 王玉荣 (Yurong WANG) Dept. of EECS, the University of Tennessee Knoxville, TN37996, USA School of Electrical Engineering Southeast University, Nanjing, China 210096 We Will Progress.
