Setting the bid and offer quantities to zero causes QMIN and QMAX to be set to zero when executing the underlying OPF. Doing runmarket without providing any reactive bids and offers is not the same. In that case, you would need to set QMIN and QMAX appropriately in the case file, as they will not be modified by any submitted offers/bids.
-- Ray Zimmerman Senior Research Associate 419A Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645 On Feb 21, 2012, at 2:04 PM, Dailan Xu wrote: > I am sorry for asking many questions. > > Considering active and reactive offer and bid quantities, how can I set > Qmin=Qmax=0? Is it possible? > > Are these two sentences are equal: QMIN = QMAX = 0 && doing runmarket > without reactive offers and bids? > > I didn't understand exactly in which either I have to set QMIN = QMAX = 0 or > offer and bid quantities for reactive power must be zero. > > > Best Regards > > > > > > On Tue, Feb 21, 2012 at 19:55, Ray Zimmerman <[email protected]> wrote: > If you add a power factor constraint instead of setting QMIN = QMAX = 0, then > you should make sure that the corresponding QMIN and QMAX values and reactive > offer and bid quantities correspond to the available reactive range specified > by PMIN, PMAX and the power factor constraint. > > -- > Ray Zimmerman > Senior Research Associate > 419A Warren Hall, Cornell University, Ithaca, NY 14853 > phone: (607) 255-9645 > > > > > On Feb 21, 2012, at 1:49 PM, Dailan Xu wrote: > >> Dear Prof. Zimmerman, >> >> Thank you so much. Can I constrain power factor, i.e set to, for example, >> 0.9? I want to compare the results with and without considering reactive >> power as optimization variable. >> >> Best Regards >> >> Dailan >> >> >> On Tue, Feb 21, 2012 at 19:28, Ray Zimmerman <[email protected]> wrote: >> If you want to no reactive power control (i.e. generators produce no >> reactive power), then the offer and bid quantities for reactive power must >> be zero. >> >> -- >> Ray Zimmerman >> Senior Research Associate >> 419A Warren Hall, Cornell University, Ithaca, NY 14853 >> phone: (607) 255-9645 >> >> >> >> >> On Feb 21, 2012, at 12:07 PM, Dailan Xu wrote: >> >>> Dear Dr. Zimmerman, >>> >>> According to replies to one of the posts: You have written that in the case >>> of without reactive power control I can set Qmax=Qmin. In my case that I >>> have reactive and active offers and bids, how can I do this? I also want to >>> compare the results with and without reactive power control. >>> >>> Best Regards >>> >>> D. Xu >>> >>> >>> >>> On Tue, Feb 21, 2012 at 16:40, Dailan Xu <[email protected]> wrote: >>> Dear Prof. Zimmerman, >>> >>> Thank you very much for your helpful comments. >>> >>> Best Regards >>> >>> Dailan >>> >>> >>> >>> On Tue, Feb 21, 2012 at 14:42, Ray Zimmerman <[email protected]> wrote: >>> Each dispatchable load has a fixed power factor (fixed Q/P ratio) that is >>> determined by PMIN and either QMIN (negative) or QMAX (positive). Only one >>> of QMIN and QMAX can be non-zero (in your data they are both non-zero). >>> Let's suppose that for dispatchable load k that QMIN is the non-zero one. >>> In this case, gen(k,QG) will always be negative and equal to gen(k,PG) * >>> gen(k,QMIN)/gen(k,PMIN). This means that this unit always absorbs both real >>> and reactive power, so it can have non-zero bids to buy both, but the >>> offers to sell must be zero quantity (since PMAX and QMAX are both zero). >>> So you must make sure that the bid quantities have the same ratio ... that >>> is ... sum(bid.Q.qty(k,:)/sum(bid.P.qty(k,:)) must equal >>> gen(k,QMIN)/gen(k,PMIN). >>> >>> -- >>> Ray Zimmerman >>> Senior Research Associate >>> 419A Warren Hall, Cornell University, Ithaca, NY 14853 >>> phone: (607) 255-9645 >>> >>> >>> >>> >>> On Feb 20, 2012, at 4:38 PM, Dailan Xu wrote: >>> >>>> Dear Dr. Zimmerman, >>>> >>>> I am so sorry I disturbed you again. >>>> >>>> When I set Qmax=0 , I get the following error #1 and all the Q/P ratios >>>> are constant and consistent with the offers and bids and when I set it to >>>> non-zero I get error #2. >>>> >>>> If you see the case study in 15 buses I have both generators and >>>> dispatchable loads i.e. buses {6 9 14 28 30 38 40 45 47 54 56 62 64 81 >>>> 84}. >>>> >>>> If it is possible for you please see the files. >>>> >>>> Error #1: >>>> ??? Error using ==> off2case at 174 >>>> Qmax <= 0, reactive offer not allowed for gen 20 >>>> >>>> Error in ==> smartmkt at 74 >>>> [gen, genoffer] = off2case(mpc.gen, mpc.gencost, offers, bids, mkt.lim); >>>> >>>> Error in ==> runmarket at 141 >>>> [co, cb, r, dispatch, success] = smartmkt(mpc, offers, bids, mkt, mpopt); >>>> >>>> Error #2: >>>> >>>> ??? Error using ==> makeAvl at 73 >>>> makeAvl: either Qmin or Qmax must be equal to zero for each dispatchable >>>> load. >>>> >>>> Error in ==> opf_setup at 168 >>>> [Avl, lvl, uvl] = makeAvl(baseMVA, gen); >>>> >>>> Error in ==> opf at 219 >>>> om = opf_setup(mpc, mpopt); >>>> >>>> Error in ==> uopf at 128 >>>> [results, success] = opf(mpc, mpopt); >>>> >>>> Error in ==> smartmkt at 90 >>>> [r, success] = uopf(mpc2, mpopt); >>>> >>>> Error in ==> runmarket at 141 >>>> [co, cb, r, dispatch, success] = smartmkt(mpc, offers, bids, mkt, mpopt); >>>> >>>> Best Regards >>>> >>>> Dailan >>>> >>>> >>>> >>>> On Mon, Feb 20, 2012 at 22:10, Ray Zimmerman <[email protected]> wrote: >>>> The error implies that there is a load that has a non-zero Q bid quantity >>>> and a non-zero Q offer quantity. One of them must be zero. I.e. A load is >>>> either always absorbing reactive power or always supplying it (remember >>>> constant Q/P ratio). >>>> >>>> Ray >>>> >>>> On Feb 20, 2012, at 4:06 PM, Dailan Xu wrote: >>>> >>>>> Dear Dr. Zimmerman, >>>>> >>>>> I have done all of your recommendation. But I get the following error. I >>>>> have attached the files that I have changed. >>>>> >>>>> ?? Error using ==> makeAvl at 73 >>>>> makeAvl: either Qmin or Qmax must be equal to zero for each dispatchable >>>>> load. >>>>> >>>>> Error in ==> opf_setup at 168 >>>>> [Avl, lvl, uvl] = makeAvl(baseMVA, gen); >>>>> >>>>> Error in ==> opf at 219 >>>>> om = opf_setup(mpc, mpopt); >>>>> >>>>> Error in ==> uopf at 128 >>>>> [results, success] = opf(mpc, mpopt); >>>>> >>>>> Error in ==> smartmkt at 90 >>>>> [r, success] = uopf(mpc2, mpopt); >>>>> >>>>> Error in ==> runmarket at 141 >>>>> [co, cb, r, dispatch, success] = smartmkt(mpc, offers, bids, mkt, mpopt); >>>>> >>>>> Best Regards >>>>> >>>>> Dailan >>>>> >>>>> >>>>> >>>>> On Mon, Feb 20, 2012 at 21:53, Ray Zimmerman <[email protected]> wrote: >>>>> For the generators the reactive offer and bid quantities should be >>>>> consistent with the QMAX and QMIN (if negative) parameters for the >>>>> generator. For dispatchable loads, the ratio of P and Q is always >>>>> constant (defined by PMIN and QMIN or QMAX, whichever is non-zero). The P >>>>> and Q bid quantities must be consistent with (ratio must be the same) >>>>> this ratio. >>>>> >>>>> -- >>>>> Ray Zimmerman >>>>> Senior Research Associate >>>>> 419A Warren Hall, Cornell University, Ithaca, NY 14853 >>>>> phone: (607) 255-9645 >>>>> >>>>> >>>>> >>>>> >>>>> On Feb 20, 2012, at 3:44 PM, Dailan Xu wrote: >>>>> >>>>>> Dear Dr. zimmerman, >>>>>> >>>>>> Thank you so much. In my case, if you look at the file, I have 15 >>>>>> Generators and 29 dispatcahble loads in which 15 genarators are in the >>>>>> same place with dispatchable loads. I don't know how can I adjust Qmax >>>>>> and Qmin as one of them should be zero. After setting I got the >>>>>> following errors: >>>>>> >>>>>> ??? Error using ==> off2case at 174 >>>>>> Qmax <= 0, reactive offer not allowed for gen 17 >>>>>> >>>>>> Error in ==> smartmkt at 74 >>>>>> [gen, genoffer] = off2case(mpc.gen, mpc.gencost, offers, bids, mkt.lim); >>>>>> >>>>>> Error in ==> runmarket at 141 >>>>>> [co, cb, r, dispatch, success] = smartmkt(mpc, offers, bids, mkt, mpopt); >>>>>> >>>>>> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ >>>>>> After changing Qmax I got these errors >>>>>> >>>>>> ??? Error using ==> makeAvl at 73 >>>>>> makeAvl: either Qmin or Qmax must be equal to zero for each dispatchable >>>>>> load. >>>>>> >>>>>> Error in ==> opf_setup at 168 >>>>>> [Avl, lvl, uvl] = makeAvl(baseMVA, gen); >>>>>> >>>>>> Error in ==> opf at 219 >>>>>> om = opf_setup(mpc, mpopt); >>>>>> >>>>>> Error in ==> uopf at 128 >>>>>> [results, success] = opf(mpc, mpopt); >>>>>> >>>>>> Error in ==> smartmkt at 90 >>>>>> [r, success] = uopf(mpc2, mpopt); >>>>>> >>>>>> Error in ==> runmarket at 141 >>>>>> [co, cb, r, dispatch, success] = smartmkt(mpc, offers, bids, mkt, mpopt); >>>>>> >>>>>> Best Regards >>>>>> >>>>>> D. Xu >>>>>> >>>>>> >>>>>> >>>>>> On Mon, Feb 20, 2012 at 21:13, Ray Zimmerman <[email protected]> wrote: >>>>>> It's been a while since I looked at this code, but it appears that there >>>>>> is a requirement that reactive bids and offers must have ng rows, where >>>>>> ng is equal to the total number of generators and dispatchable loads >>>>>> together. >>>>>> >>>>>> -- >>>>>> Ray Zimmerman >>>>>> Senior Research Associate >>>>>> 419A Warren Hall, Cornell University, Ithaca, NY 14853 >>>>>> phone: (607) 255-9645 >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> On Feb 20, 2012, at 1:28 PM, Dailan Xu wrote: >>>>>> >>>>>>> By adding reactive offers I get the following error, as I have attached >>>>>>> the files. >>>>>>> >>>>>>> Error using - >>>>>>> Matrix dimensions must agree. >>>>>>> >>>>>>> Error in auction (line 185) >>>>>>> clip = o.on .* (offers.prc - co.prc); >>>>>>> >>>>>>> Error in smartmkt (line 156) >>>>>>> [co.Q, cb.Q] = auction(Qoffer, Qbid, mkt.auction_type, >>>>>>> mkt.lim.Q, gtee_prc); >>>>>>> >>>>>>> Error in runmarket (line 141) >>>>>>> [co, cb, r, dispatch, success] = smartmkt(mpc, offers, bids, mkt, >>>>>>> mpopt); >>>>>>> >>>>>>> Error in ANM_3 (line 75) >>>>>>> [r,co,cb] = runmarket(mpc,offers,bids,mkt,mpoption); >>>>>>> >>>>>>> Best Regards >>>>>>> >>>>>>> Dailan >>>>>>> >>>>>>> >>>>>>> >>>>>>> ---------- Forwarded message ---------- >>>>>>> From: Dailan Xu <[email protected]> >>>>>>> Date: Mon, Feb 20, 2012 at 18:29 >>>>>>> Subject: Re: Reactive offers and bids >>>>>>> To: Ray Zimmerman <[email protected]> >>>>>>> >>>>>>> >>>>>>> Please look at this files. It is the simplified version of that I sent >>>>>>> you. I think the problem is this MATPOWER cannot solve reactive bids >>>>>>> with more than 1 block per bid.Please help me. >>>>>>> >>>>>>> Reference to non-existent field 'Q'. >>>>>>> >>>>>>> Error in smartmkt (line 139) >>>>>>> nQo = size(offers.Q.qty, 2); >>>>>>> >>>>>>> Error in runmarket (line 141) >>>>>>> [co, cb, r, dispatch, success] = smartmkt(mpc, offers, bids, mkt, >>>>>>> mpopt); >>>>>>> >>>>>>> >>>>>>> Best Regards >>>>>>> >>>>>>> Dailan >>>>>>> >>>>>>> >>>>>>> On Mon, Feb 20, 2012 at 18:01, Dailan Xu <[email protected]> wrote: >>>>>>> Please don't write as a function. Please select all and push F9 and >>>>>>> will get the error. When I run it for only active offers and bids there >>>>>>> is no problem while by adding the reactive bids this problem is >>>>>>> occurred. >>>>>>> Best Regards >>>>>>> >>>>>>> D. Xu >>>>>>> >>>>>>> >>>>>>> >>>>>>> On Mon, Feb 20, 2012 at 17:54, Ray Zimmerman <[email protected]> wrote: >>>>>>> I cannot reproduce your error. Here is what I get ... >>>>>>> >>>>>>> >> ANM_1 >>>>>>> >>>>>>> ans = >>>>>>> >>>>>>> 44 21 >>>>>>> >>>>>>> >>>>>>> ans = >>>>>>> >>>>>>> 44 8 >>>>>>> >>>>>>> >>>>>>> ans = >>>>>>> >>>>>>> 29 2 >>>>>>> >>>>>>> >>>>>>> ans = >>>>>>> >>>>>>> 29 2 >>>>>>> >>>>>>> >>>>>>> ans = >>>>>>> >>>>>>> 44 2 >>>>>>> >>>>>>> >>>>>>> ans = >>>>>>> >>>>>>> 44 2 >>>>>>> >>>>>>> >>>>>>> SMARTMARKET: non-convergent UOPFError using * >>>>>>> Inner matrix dimensions must agree. >>>>>>> >>>>>>> Error in smartmkt (line 174) >>>>>>> price = mkt.lim.P.max_offer * ones(ng, 1); >>>>>>> >>>>>>> Error in runmarket (line 141) >>>>>>> [co, cb, r, dispatch, success] = smartmkt(mpc, offers, bids, mkt, >>>>>>> mpopt); >>>>>>> >>>>>>> Error in ANM_1 (line 260) >>>>>>> [r, co, cb, f, dispatch, success, et] = >>>>>>> runmarket(mpc,offers,bids,mkt,mpoption); >>>>>>> >>>>>>> 174 price = mkt.lim.P.max_offer * ones(ng, 1); >>>>>>> >>>>>>> >>>>>>> >>>>>>> -- >>>>>>> Ray Zimmerman >>>>>>> Senior Research Associate >>>>>>> 419A Warren Hall, Cornell University, Ithaca, NY 14853 >>>>>>> phone: (607) 255-9645 >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> On Feb 20, 2012, at 10:48 AM, Dailan Xu wrote: >>>>>>> >>>>>>>> Dear Dr. Zimmerman, >>>>>>>> >>>>>>>> I want to do runmarket with active and reactive offers and bids. I >>>>>>>> receive the following message: >>>>>>>> >>>>>>>> How can I solve the problem? I have attached the case files. >>>>>>>> By the way, I do not want to distribute my case file because of this >>>>>>>> reason I only sent to your email. >>>>>>>> >>>>>>>> Reference to non-existent field 'Q'. >>>>>>>> >>>>>>>> Error in smartmkt (line 139) >>>>>>>> nQo = size(offers.Q.qty, 2); >>>>>>>> >>>>>>>> Error in runmarket (line 141) >>>>>>>> [co, cb, r, dispatch, success] = smartmkt(mpc, offers, bids, mkt, >>>>>>>> mpopt); >>>>>>>> >>>>>>>> Best Regards >>>>>>>> >>>>>>>> Dailan >>>>>>>> >>>>>>>> >>>>>>>> <ANM_1.m><case84_newdispatch6_7.m> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> <case84_newdispatch6_3.m><ANM_3.m> >>>>>> >>>>>> >>>>> >>>>> >>>>> <case84_newdispatch6_8.m><ANM_3.m> >>>> >>>> >>>> <case84_newdispatch6_8.m><ANM_3.m> >>> >>> >>> >> >> > >
