Ok. I know in OPF, we should use constraints on active and reactive power generation and declare one bus as a reference bus. But I'm not sure about whether in PF we must have to put constraints on reactive power generation. But in this case I agree with you that, to satisfy the power balance equation additional virtual generator have to add to supply slack power.
On Thu, May 5, 2016 at 2:14 PM, Jovan Ilic <[email protected]> wrote: > > Mirish, > > You should use Qmax and Qmin for power flow as well. In Fiaze's case, if > there > are no other generators in his system, he should just put a fictitious > generator at > the substation bus and declare it a slack bus. > > Jovan > > On Thu, May 5, 2016 at 8:05 AM, Mirish Thakur <[email protected]> > wrote: > >> Hello Fiaz, >> >> If you want to perform OPF then you have to put limits on active and >> reactive power generation; i.e. Pmax, Pmin, Qmax Qmin in generator matrix >> column. Just try to format your case according to any sample case;e.g. >> case9. You can get additional information from manual in the Table B-1 to >> B-4. >> >> regards >> Mirish >> >> On Thu, May 5, 2016 at 1:54 PM, Fiaz Ahmad <[email protected]> >> wrote: >> >>> I am putting P=5000W and Q=3500VARs as a substation. How can I make P Q >>> unlimited? Any suggestion >>> On May 5, 2016 2:48 PM, "Jovan Ilic" <[email protected]> wrote: >>> >>>> >>>> Fiaz, >>>> >>>> If you are using the data in your original post only, there are no >>>> generators in >>>> that data set. You should put a (unlimited P and Q) generator where >>>> the substation >>>> would be in your system. >>>> >>>> Jovan >>>> >>>> >>>> On Thu, May 5, 2016 at 7:29 AM, Fiaz Ahmad <[email protected]> >>>> wrote: >>>> >>>>> Yes I m using balanced three phase but how can I do it with matpower. >>>>> I changed the bus data and gen.data matrices but I couldn't get the power >>>>> flows. >>>>> On May 5, 2016 2:24 PM, "Jovan Ilic" <[email protected]> wrote: >>>>> >>>>>> >>>>>> You could use Matpower to simulate distribution systems if you are >>>>>> only >>>>>> interested in balanced 3 phase without mutual line coupling systems. >>>>>> >>>>>> Jovan >>>>>> >>>>>> >>>>>> On Thu, May 5, 2016 at 3:41 AM, Ji Chen <[email protected]> wrote: >>>>>> >>>>>>> Hi Shri, >>>>>>> I am interested in power flows for distribution networks >>>>>>> recently. Do you mean that Matpower is not a good chioce for >>>>>>> distribution networks simulation or it just can not do distribution >>>>>>> networks simulation? >>>>>>> >>>>>>> Thanks, >>>>>>> Ji >>>>>>> >>>>>>> >>>>>>> >>>>>>> At 2016-05-04 23:02:50, "Abhyankar, Shrirang G." <[email protected]> >>>>>>> wrote: >>>>>>> >>>>>>> http://ewh.ieee.org/soc/pes/dsacom/testfeeders/index.html >>>>>>> >>>>>>> However, as Jovan mentioned, MATPOWER is for solving balanced >>>>>>> three-phase transmission systems. If you are interested in solving >>>>>>> unbalanced three-phase power flows for distribution networks then refer >>>>>>> to >>>>>>> either OpenDSS or GridLAB-D. >>>>>>> >>>>>>> Shri >>>>>>> >>>>>>> From: Fiaz Ahmad <[email protected]> >>>>>>> Reply-To: MATPOWER discussion forum <[email protected]> >>>>>>> Date: Wednesday, May 4, 2016 at 8:49 AM >>>>>>> To: MATPOWER discussion forum <[email protected]>, " >>>>>>> [email protected]" <[email protected]> >>>>>>> Subject: Re: modification on Matpower case.m file for power flow of >>>>>>> distribution system >>>>>>> >>>>>>> Thanks Jovan, >>>>>>> >>>>>>> In Matpower there are no test cases for distribution systems... >>>>>>> Where can i find IEEE distribution system test cases? >>>>>>> >>>>>>> Regards >>>>>>> >>>>>>> >>>>>>> Have a nice day >>>>>>> >>>>>>> Regards, >>>>>>> FIAZ AHMAD >>>>>>> PhD Student, >>>>>>> FENS Sabanci University, >>>>>>> Istanbul Turkey >>>>>>> >>>>>>> >>>>>>> >>>>>>> On Wed, May 4, 2016 at 4:46 PM, Jovan Ilic <[email protected]> >>>>>>> wrote: >>>>>>> >>>>>>>> >>>>>>>> Fiaz, >>>>>>>> >>>>>>>> You are missing lots of data here. I suggest looking at IEEE >>>>>>>> distribution system >>>>>>>> test cases to see what is involved. Matpower is used for >>>>>>>> transmission systems >>>>>>>> not distribution systems. >>>>>>>> >>>>>>>> Jovan >>>>>>>> >>>>>>>> On Wed, May 4, 2016 at 3:45 AM, Fiaz Ahmad < >>>>>>>> [email protected]> wrote: >>>>>>>> >>>>>>>>> Hi. i have the following data files for ieee 33 bus radial >>>>>>>>> distribution system. i want to modify the case33.m file in matpower to >>>>>>>>> carry out the power flow of the above distribution system. Please >>>>>>>>> guide me >>>>>>>>> how can i achieve that. >>>>>>>>> >>>>>>>>> linedata33 >>>>>>>>> % Bus fbus tbus R X >>>>>>>>> 1 1 2 0.0922 0.0470 >>>>>>>>> 2 2 3 0.4930 0.2511 >>>>>>>>> 3 3 4 0.3660 0.1864 >>>>>>>>> 4 4 5 0.3811 0.1941 >>>>>>>>> 4 5 6 0.8190 0.7070 >>>>>>>>> 6 6 7 0.1872 0.6188 >>>>>>>>> 7 7 8 0.7114 0.2351 >>>>>>>>> 8 8 9 1.0300 0.7400 >>>>>>>>> 9 9 10 1.0440 0.7400 >>>>>>>>> 10 10 11 0.1966 0.0650 >>>>>>>>> 11 11 12 0.3744 0.1238 >>>>>>>>> 12 12 13 1.4680 1.1550 >>>>>>>>> 13 13 14 0.5416 0.7129 >>>>>>>>> 14 14 15 0.5910 0.5260 >>>>>>>>> 15 15 16 0.7463 0.5450 >>>>>>>>> 16 16 17 1.2890 1.7210 >>>>>>>>> 17 17 18 0.7320 0.5740 >>>>>>>>> 18 2 19 0.1640 0.1565 >>>>>>>>> 19 19 20 1.5042 1.3554 >>>>>>>>> 20 20 21 0.4095 0.4784 >>>>>>>>> 21 21 22 0.7089 0.9373 >>>>>>>>> 22 3 23 0.4512 0.3083 >>>>>>>>> 23 23 24 0.8980 0.7091 >>>>>>>>> 24 24 25 0.8960 0.7011 >>>>>>>>> 25 6 26 0.2030 0.1034 >>>>>>>>> 26 26 27 0.2842 0.1447 >>>>>>>>> 27 27 28 1.0590 0.9337 >>>>>>>>> 28 28 29 0.8042 0.7006 >>>>>>>>> 29 29 30 0.5075 0.2585 >>>>>>>>> 30 30 31 0.9744 0.9630 >>>>>>>>> 31 31 32 0.3105 0.3619 >>>>>>>>> 32 32 33 0.3410 0.5302 >>>>>>>>> >>>>>>>>> loaddata33 >>>>>>>>> %Bus P Q >>>>>>>>> 1 0 0 0 >>>>>>>>> 2 100 60 0 >>>>>>>>> 3 90 40 0 >>>>>>>>> 4 120 80 0 >>>>>>>>> 5 60 30 0 >>>>>>>>> 6 60 20 0 >>>>>>>>> 7 200 100 0 >>>>>>>>> 8 200 100 0 >>>>>>>>> 9 60 20 0 >>>>>>>>> 10 60 20 0 >>>>>>>>> 11 45 30 0 >>>>>>>>> 12 60 35 0 >>>>>>>>> 13 60 35 0 >>>>>>>>> 14 120 80 0 >>>>>>>>> 15 60 10 0 >>>>>>>>> 16 60 20 0 >>>>>>>>> 17 60 20 0 >>>>>>>>> 18 90 40 0 >>>>>>>>> 19 90 40 0 >>>>>>>>> 20 90 40 0 >>>>>>>>> 21 90 40 0 >>>>>>>>> 22 90 40 0 >>>>>>>>> 23 90 50 0 >>>>>>>>> 24 420 200 0 >>>>>>>>> 25 420 200 0 >>>>>>>>> 26 60 25 0 >>>>>>>>> 27 60 25 0 >>>>>>>>> 28 60 20 0 >>>>>>>>> 29 120 70 0 >>>>>>>>> 30 200 600 0 >>>>>>>>> 31 150 70 0 >>>>>>>>> 32 210 100 0 >>>>>>>>> 33 60 40 0 >>>>>>>>> >>>>>>>>> Please help and guide.... Thanks >>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>> >>>>>> >>>> >> >
