Re: Power Flow in Matpower
293 293 >> 1 0 1 -360360; >> 30 29 0.0034410.0226660.0194 293 293 293 >> 1 0 1 -360360; >> 37 39 0.0040440.0266330.0228 293 293 293 >> 1 0 1 -360360; >> 39 40 0.0007130.0015620.1176 293 293 293 >> 1 0 1 -360360; >> 18 19 0.0009460.0018470.1644 375 375 375 >> 1 0 1 -360360; >> 74 71 0.0025810.0170000.0146 293 293 293 >> 1 0 1 -360360; >> 75 74 0.0027900.0183760.0157 293 293 293 >> 1 0 1 -360360; >> 69 70 0.0034410.0226660.0194 293 293 293 >> 1 0 1 -360360; >> 57 55 0.0019200.0122910.0236 293 293 293 >> 1 0 1 -360360; >> 20 19 0.0009090.0017750.1580 375 375 375 >> 1 0 1 -360360; >> 21 20 0.0010320.0020150.1793 375 375 375 >> 1 0 1 -360360; >> 60 61 0.270.0061330. 375037503750 >> 1.160 1 -360360; >> 98 0.750.0110370. 200020002000 >> 1.020 1 -360360; >> 59 58 0.0001500.0214790. 100010001000 >> 1.060 1 -360360; >> 58 57 0.000.0232800. 100010001000 >> 1.010 1 -360360; >> 623 0.0001500.0232630. 100010001000 >> 0.980 1 -360360; >> 88 87 0.0001500.0232630. 100010001000 >> 1.010 1 -360360; >> 43 44 0.0001500.0222610. 100010001000 >> 0.9 0 1 -360360; >> 232 0.0001500.0213820. 100010001000 >> 0.950 1 -360360; >> 428 0.0001500.0213820. 100010001000 >> 0.9 0 1 -360360; >> 12 13 0.0001500.0238550. 100010001000 >> 1 0 1 -360360; >> 45 46 0.0001500.0222610. 100010001000 >> 0.990 1 -360360; >> 62 63 0.0001500.0232800. 100010001000 >> 1.020 1 -360360; >> 79 78 0.0001500.0232800. 100010001000 >> 1.1 0 1 -360360; >> 871 0.0001500.0232800. 100010001000 >> 1 0 1 -360360; >> 41 37 0.0002520.0221700. 630 630 630 >> 1 0 1 -360360; >> ]; >> >> ++++++++ >> >> and i got some buses relatively far from the real values >> >> the real values of the voltage are attached >> >> On 21 March 2018 at 17:33, Carlos E Murillo-Sanchez >> <ce.murillosanc...@gmail.com <mailto:ce.murillosanc...@gmail.com>> wrote: >> The Ybus matrix computed from the data in your file has NaN's and Inf's >> because branch # 69 from bus 16 to bus 17 has zero series impedance. You >> must collapse buses 16 and 17 into a single bus before applying any >> algorithm to the system because the electrical "distance" between these two >> buses is zero. >> >> Carlos. >> >> Mohammed Alhajri wrote: >>> i got >>> >>> >>> >>> 19980 NaN >>> 19981 NaN >>> 19982 NaN >>> 19983 NaN >>> 19984 NaN >>> 19985 NaN >>> 19986 NaN >>> 19987 NaN >>> 19988 NaN >>> 19989 NaN >>> 19990 NaN >>> 19991 NaN >>> 19992 NaN >>> 19993 NaN >>> 19994 NaN >>> 19995 NaN >>> 19996 NaN >>> 19997 NaN >>> 19998 NaN >>
Re: Power Flow in Matpower
3 293 293 1 0 1 -360 360; > 23 24 0.002962 0.019509 0.0167 293 293 293 1 0 1 -360 360; > 37 40 0.004535 0.029871 0.0256 293 293 293 1 0 1 -360 360; > 75 77 0.001217 0.008014 0.0069 293 293 293 1 0 1 -360 360; > 46 47 0.006760 0.044523 0.0381 293 293 293 1 0 1 -360 360; > 71 73 0.005973 0.039342 0.0337 293 293 293 1 0 1 -360 360; > 49 50 0.001475 0.009714 0.0083 293 293 293 1 0 1 -360 360; > 81 78 0.000549 0.002420 0.0137 146 146 146 1 0 1 -360 360; > 78 80 0.000725 0.003010 0.0681 293 293 293 1 0 1 -360 360; > 63 64 0.004302 0.028333 0.0243 293 293 293 1 0 1 -360 360; > 78 82 0.000935 0.004305 0.0019 146 146 146 1 0 1 -360 360; > 77 78 0.000701 0.004614 0.0040 293 293 293 1 0 1 -360 360; > 16 17 0.09 0.17 0.0060 375 375 375 1 0 1 -360 360; > 23 25 0.001413 0.009309 0.0080 293 293 293 1 0 1 -360 360; > 25 26 0.004265 0.028090 0.0241 293 293 293 1 0 1 -360 360; > 47 48 0.006366 0.041933 0.0359 293 293 293 1 0 1 -360 360; > 13 18 0.001106 0.002159 0.1921 375 375 375 1 0 1 -360 360; > 13 15 0.000492 0.000960 0.0854 375 375 375 1 0 1 -360 360; > 28 30 0.003196 0.021047 0.0180 293 293 293 1 0 1 -360 360; > 30 29 0.003441 0.022666 0.0194 293 293 293 1 0 1 -360 360; > 37 39 0.004044 0.026633 0.0228 293 293 293 1 0 1 -360 360; > 39 40 0.000713 0.001562 0.1176 293 293 293 1 0 1 -360 360; > 18 19 0.000946 0.001847 0.1644 375 375 375 1 0 1 -360 360; > 74 71 0.002581 0.017000 0.0146 293 293 293 1 0 1 -360 360; > 75 74 0.002790 0.018376 0.0157 293 293 293 1 0 1 -360 360; > 69 70 0.003441 0.022666 0.0194 293 293 293 1 0 1 -360 360; > 57 55 0.001920 0.012291 0.0236 293 293 293 1 0 1 -360 360; > 20 19 0.000909 0.001775 0.1580 375 375 375 1 0 1 -360 360; > 21 20 0.001032 0.002015 0.1793 375 375 375 1 0 1 -360 360; > 60 61 0.27 0.006133 0. 3750 3750 3750 1.16 0 1 -360 360; > 9 8 0.75 0.011037 0. 2000 2000 2000 1.02 0 1 -360 360; > 59 58 0.000150 0.021479 0. 1000 1000 1000 1.06 0 1 -360 360; > 58 57 0.00 0.023280 0. 1000 1000 1000 1.01 0 1 -360 360; > 6 23 0.000150 0.023263 0. 1000 1000 1000 0.98 0 1 -360 360; > 88 87 0.000150 0.023263 0. 1000 1000 1000 1.01 0 1 -360 360; > 43 44 0.000150 0.022261 0. 1000 1000 1000 0.9 0 1 -360 360; > 2 32 0.000150 0.021382 0. 1000 1000 1000 0.95 0 1 -360 360; > 4 28 0.000150 0.021382 0. 1000 1000 1000 0.9 0 1 -360 360; > 12 13 0.000150 0.023855 0. 1000 1000 1000 1 0 1 -360 360; > 45 46 0.000150 0.022261 0. 1000 1000 1000 0.99 0 1 -360 360; > 62 63 0.000150 0.023280 0. 1000 1000 1000 1.02 0 1 -360 360; > 79 78 0.000150 0.023280 0. 1000 1000 1000 1.1 0 1 -360 360; > 8 71 0.000150 0.023280 0. 1000 1000 1000 1 0 1 -360 360; > 41 37 0.000252 0.022170 0. 630 630 630 1 0 1 -360 360; > ]; > > > > and i got some buses relatively far from the real values > > the real values of the voltage are attached > > On 21 March 2018 at 17:33, Carlos E Murillo-Sanchez < > ce.murillosanc...@gmail.com> wrote: > >> The Ybus matrix computed from the data in your file has NaN's and Inf's >> because branch # 69 from bus 16 to bus 17 has zero series impedance. You >> must collapse buses 16 and 17 into a single bus before applying any >> algorithm to the system because the electrical "distance" between these two >> buses is zero. >> >> Carlos. >> >> Mohammed Alhajri wrote: >> >> i got >> >> >> >> 19980 NaN >> 19981 NaN >> 19982 NaN >> 19983 NaN >> 19984 NaN >> 19985 NaN >> 19986 NaN >> 19987 NaN >> 19988 NaN >> 19989 NaN >> 19990 NaN >> 19991 NaN >> 19992 NaN >> 19993 NaN >> 19994 NaN >> 19995 NaN >> 19996 NaN >> 19997 NaN >> 19998 NaN >> 1 NaN >> 2 NaN >> Gauss-Seidel power flow did not converge in 2 iterations. >> >> >>>>> Did NOT converge (47.99 seconds) <<<<< >> >> >> On 20 March 2018 at 19:44, Ray Zimmerman <r...@cornell.edu> wrote: >> >>> Unfortunately, I do not have time to work on this myself. I was just >>> giving a suggestion for another direction to try if you want to understand >>> the issue that MATPOWER is having with your case. Could you post the output >>> (using verbose set to 2) of runpf() when using a MATPOIWER case file >>> that corresponds to the solved ca
Re: Power Flow in Matpower
60; > 2 32 0.0001500.0213820. 100010001000 > 0.950 1 -360360; > 4 28 0.0001500.0213820. 100010001000 > 0.9 0 1 -360360; > 1213 0.0001500.0238550. 100010001000 > 1 0 1 -360360; > 4546 0.0001500.0222610. 100010001000 > 0.990 1 -360360; > 6263 0.0001500.0232800. 100010001000 > 1.020 1 -360360; > 7978 0.0001500.0232800. 100010001000 > 1.1 0 1 -360360; > 8 71 0.0001500.0232800. 100010001000 > 1 0 1 -360360; > 4137 0.0002520.0221700. 630 630 630 > 1 0 1 -360360; > ]; > > > > and i got some buses relatively far from the real values > > the real values of the voltage are attached > > On 21 March 2018 at 17:33, Carlos E Murillo-Sanchez > <ce.murillosanc...@gmail.com <mailto:ce.murillosanc...@gmail.com>> wrote: > The Ybus matrix computed from the data in your file has NaN's and Inf's > because branch # 69 from bus 16 to bus 17 has zero series impedance. You > must collapse buses 16 and 17 into a single bus before applying any algorithm > to the system because the electrical "distance" between these two buses is > zero. > > Carlos. > > Mohammed Alhajri wrote: >> i got >> >> >> >> 19980 NaN >> 19981 NaN >> 19982 NaN >> 19983 NaN >> 19984 NaN >> 19985 NaN >> 19986 NaN >> 19987 NaN >> 19988 NaN >> 19989 NaN >> 19990 NaN >> 19991 NaN >> 19992 NaN >> 19993 NaN >> 19994 NaN >> 19995 NaN >> 19996 NaN >> 19997 NaN >> 19998 NaN >> 1 NaN >> 2 NaN >> Gauss-Seidel power flow did not converge in 2 iterations. >> >> >>>>> Did NOT converge (47.99 seconds) <<<<< >> >> >> On 20 March 2018 at 19:44, Ray Zimmerman <r...@cornell.edu >> <mailto:r...@cornell.edu>> wrote: >> Unfortunately, I do not have time to work on this myself. I was just giving >> a suggestion for another direction to try if you want to understand the >> issue that MATPOWER is having with your case. Could you post the output >> (using verbose set to 2) of runpf() when using a MATPOIWER case file that >> corresponds to the solved case from the Hadi Sadat code? >> >> And if you have any questions about the MATPOWER case format or MATPOWER >> power flow options, feel free to ask. >> >> Ray >> >> >> >>> On Mar 20, 2018, at 11:28 AM, Mohammed Alhajri <u106...@gmail.com >>> <mailto:u106...@gmail.com>> wrote: >>> >>> Ok, i have attached the case information in format of Hadi Saadat code, can >>> you please try it in MATPOWER? >>> >>> because we have spent more than three weeks checking the format, but still >>> dose not converge... >>> >>> Regards,,, >>> >>> بتاريخ ٢٠١٨/٠٣/٢٠ ٦:٢٦ م، كتب "Ray Zimmerman" <r...@cornell.edu >>> <mailto:r...@cornell.edu>>: >>> It’s possible that the modeling is not identical or that there is some >>> error in your conversion to MATPOWER format. You can check by talking the >>> solved case from your other software, converting that solved case to >>> MATPOWER and then trying the MATPOWER power flow. It should converge in a >>> single iteration. If it does not, then you know that there is either a >>> mistake somewhere or a difference in modeling. >>> >>>Ray >>> >>> >>>> On Mar 16, 2018, at 12:42 PM, Mohammed Alhajri < >>>> <mailto:u106...@gmail.com>u106...@gmail.com <mailto:u106...@gmail.com>> >>>> wrote: >>>> >>>> i tried that but unfortunately not work >>>> >>>> بتاريخ ٢٠١٨/٠٣/١٦ ٨:٣٠ م، كتب "Abhyankar, Shrirang G." < >>>> <mailto:abhy...@anl.gov>abhy...@anl.gov <mailto:abhy...@anl.gov>>: >>>> See FAQ #5 <http://www.pserc.cornell.edu/matpower/#pfconvergence> >>>> >>>> Thanks, >>>> >>>> Shri >>>> >>>> Ph: (630) 252 0219 <tel:%28630%29%20252-0219> >>>> www.mcs.anl.gov/~abhyshr <http://www.mcs.anl.gov/%7Eabhyshr> >>>> >>>> >>>> >>>> >>>> From: <bounce-122387760-73493...@list.cornell.edu >>>> <mailto:bounce-122387760-73493...@list.cornell.edu>> on behalf of Mohammed >>>> Alhajri < <mailto:u106...@gmail.com>u106...@gmail.com >>>> <mailto:u106...@gmail.com>> >>>> Reply-To: MATPOWER discussion forum < >>>> <mailto:matpowe...@list.cornell.edu>matpowe...@list.cornell.edu >>>> <mailto:matpowe...@list.cornell.edu>> >>>> Date: Friday, March 16, 2018 at 11:26 AM >>>> To: MATPOWER discussion forum < >>>> <mailto:matpowe...@list.cornell.edu>matpowe...@list.cornell.edu >>>> <mailto:matpowe...@list.cornell.edu>> >>>> Subject: Re: Power Flow in Matpower >>>> >>>> >>>> any answer to this question? >>>> >>>> >>>> بتاريخ ٢٠١٨/٠٢/٢٥ ٧:١٨ م، كتب "Mohammed Alhajri" < >>>> <mailto:u106...@gmail.com>u106...@gmail.com <mailto:u106...@gmail.com>>: >>>> >>>> Hello All, >>>> >>>> >>>> I did the power flow for a 89-bus network and it converges using Hadi >>>> Sadat code after 17080 iterations. The accuracy was 1e-8 and the method is >>>> Gauss-Seidel Method. >>>> >>>> >>>> But when I did the power flow using matpower it does not converge! I tried >>>> to increase the maximum iteration, I put it 10, and still did not >>>> cnvarge! >>>> >>>> >>>> I have attached the data according to Hadi Sadat Code, can any one try to >>>> do the power flow using matpower? >>>> >>>> >>> >> >> > > >
Re: Power Flow in Matpower
0.00 0.023280 0. 1000 1000 1000 1.01 0 1 -360 360; 6 23 0.000150 0.023263 0. 1000 1000 1000 0.98 0 1 -360 360; 88 87 0.000150 0.023263 0. 1000 1000 1000 1.01 0 1 -360 360; 43 44 0.000150 0.022261 0. 1000 1000 1000 0.9 0 1 -360 360; 2 32 0.000150 0.021382 0. 1000 1000 1000 0.95 0 1 -360 360; 4 28 0.000150 0.021382 0. 1000 1000 1000 0.9 0 1 -360 360; 12 13 0.000150 0.023855 0. 1000 1000 1000 1 0 1 -360 360; 45 46 0.000150 0.022261 0. 1000 1000 1000 0.99 0 1 -360 360; 62 63 0.000150 0.023280 0. 1000 1000 1000 1.02 0 1 -360 360; 79 78 0.000150 0.023280 0. 1000 1000 1000 1.1 0 1 -360 360; 8 71 0.000150 0.023280 0. 1000 1000 1000 1 0 1 -360 360; 41 37 0.000252 0.022170 0. 630 630 630 1 0 1 -360 360; ]; and i got some buses relatively far from the real values the real values of the voltage are attached On 21 March 2018 at 17:33, Carlos E Murillo-Sanchez < ce.murillosanc...@gmail.com> wrote: > The Ybus matrix computed from the data in your file has NaN's and Inf's > because branch # 69 from bus 16 to bus 17 has zero series impedance. You > must collapse buses 16 and 17 into a single bus before applying any > algorithm to the system because the electrical "distance" between these two > buses is zero. > > Carlos. > > Mohammed Alhajri wrote: > > i got > > > > 19980 NaN > 19981 NaN > 19982 NaN > 19983 NaN > 19984 NaN > 19985 NaN > 19986 NaN > 19987 NaN > 19988 NaN > 19989 NaN > 19990 NaN > 19991 NaN > 19992 NaN > 19993 NaN > 19994 NaN > 19995 NaN > 19996 NaN > 19997 NaN > 19998 NaN > 1 NaN > 2 NaN > Gauss-Seidel power flow did not converge in 2 iterations. > > >>>>> Did NOT converge (47.99 seconds) <<<<< > > > On 20 March 2018 at 19:44, Ray Zimmerman <r...@cornell.edu> wrote: > >> Unfortunately, I do not have time to work on this myself. I was just >> giving a suggestion for another direction to try if you want to understand >> the issue that MATPOWER is having with your case. Could you post the output >> (using verbose set to 2) of runpf() when using a MATPOIWER case file >> that corresponds to the solved case from the Hadi Sadat code? >> >> And if you have any questions about the MATPOWER case format or MATPOWER >> power flow options, feel free to ask. >> >> Ray >> >> >> >> On Mar 20, 2018, at 11:28 AM, Mohammed Alhajri <u106...@gmail.com> wrote: >> >> Ok, i have attached the case information in format of Hadi Saadat code, >> can you please try it in MATPOWER? >> >> because we have spent more than three weeks checking the format, but >> still dose not converge... >> >> Regards,,, >> >> بتاريخ ٢٠١٨/٠٣/٢٠ ٦:٢٦ م، كتب "Ray Zimmerman" <r...@cornell.edu>: >> >>> It’s possible that the modeling is not identical or that there is some >>> error in your conversion to MATPOWER format. You can check by talking the >>> solved case from your other software, converting that solved case to >>> MATPOWER and then trying the MATPOWER power flow. It should converge in a >>> single iteration. If it does not, then you know that there is either a >>> mistake somewhere or a difference in modeling. >>> >>>Ray >>> >>> >>> On Mar 16, 2018, at 12:42 PM, Mohammed Alhajri < <u106...@gmail.com> >>> u106...@gmail.com> wrote: >>> >>> i tried that but unfortunately not work >>> >>> بتاريخ ٢٠١٨/٠٣/١٦ ٨:٣٠ م، كتب "Abhyankar, Shrirang G." < >>> <abhy...@anl.gov>abhy...@anl.gov>: >>> >>>> See FAQ #5 <http://www.pserc.cornell.edu/matpower/#pfconvergence> >>>> >>>> >>>> >>>> Thanks, >>>> >>>> Shri >>>> >>>> Ph: (630) 252 0219 <%28630%29%20252-0219> >>>> >>>> www.mcs.anl.gov/~abhyshr <http://www.mcs.anl.gov/%7Eabhyshr> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> *From: *<bounce-122387760-73493...@list.cornell.edu> on behalf of >>>> Mohammed Alhajri < <u106...@gmail.com>u106...@gmail.com> >>>> *Reply-To: *MATPOWER discu
Re: Power Flow in Matpower
The Ybus matrix computed from the data in your file has NaN's and Inf's because branch # 69 from bus 16 to bus 17 has zero series impedance. You must collapse buses 16 and 17 into a single bus before applying any algorithm to the system because the electrical "distance" between these two buses is zero. Carlos. Mohammed Alhajri wrote: i got 19980 NaN 19981 NaN 19982 NaN 19983 NaN 19984 NaN 19985 NaN 19986 NaN 19987 NaN 19988 NaN 19989 NaN 19990 NaN 19991 NaN 19992 NaN 19993 NaN 19994 NaN 19995 NaN 19996 NaN 19997 NaN 19998 NaN 1 NaN 2 NaN Gauss-Seidel power flow did not converge in 2 iterations. >>>>> Did NOT converge (47.99 seconds) <<<<< On 20 March 2018 at 19:44, Ray Zimmerman <r...@cornell.edu> wrote: Unfortunately, I do not have time to work on this myself. I was just giving a suggestion for another direction to try if you want to understand the issue that MATPOWER is having with your case. Could you post the output (using verbose set to 2) of runpf() when using a MATPOIWER case file that corresponds to the solved case from the Hadi Sadat code? And if you have any questions about the MATPOWER case format or MATPOWER power flow options, feel free to ask. Ray On Mar 20, 2018, at 11:28 AM, Mohammed Alhajri <u106...@gmail.com> wrote: Ok, i have attached the case information in format of Hadi Saadat code, can you please try it in MATPOWER? because we have spent more than three weeks checking the format, but still dose not converge... Regards,,, بتاريخ ٢٠١٨/٠٣/٢٠ ٦:٢٦ م، كتب "Ray Zimmerman" <r...@cornell.edu>: It’s possible that the modeling is not identical or that there is some error in your conversion to MATPOWER format. You can check by talking the solved case from your other software, converting that solved case to MATPOWER and then trying the MATPOWER power flow. It should converge in a single iteration. If it does not, then you know that there is either a mistake somewhere or a difference in modeling. Ray On Mar 16, 2018, at 12:42 PM, Mohammed Alhajri <
Re: Power Flow in Matpower
Hello Mohammed, The problem is in the *branch joining buses 16 and 17* (line 191 in the file). This branch had zero R and zero X. Just edit the value of X to something reasonable (I used 0.001), and the case solves just fine, in 4 iterations. -- Jose L. Marin Grupo AIA 2018-03-21 3:51 GMT+01:00 Mohammed Alhajri <u106...@gmail.com>: > i got > > > > 19980 NaN > 19981 NaN > 19982 NaN > 19983 NaN > 19984 NaN > 19985 NaN > 19986 NaN > 19987 NaN > 19988 NaN > 19989 NaN > 19990 NaN > 19991 NaN > 19992 NaN > 19993 NaN > 19994 NaN > 19995 NaN > 19996 NaN > 19997 NaN > 19998 NaN > 1 NaN > 2 NaN > Gauss-Seidel power flow did not converge in 2 iterations. > > >>>>> Did NOT converge (47.99 seconds) <<<<< > > > On 20 March 2018 at 19:44, Ray Zimmerman <r...@cornell.edu> wrote: > >> Unfortunately, I do not have time to work on this myself. I was just >> giving a suggestion for another direction to try if you want to understand >> the issue that MATPOWER is having with your case. Could you post the output >> (using verbose set to 2) of runpf() when using a MATPOIWER case file >> that corresponds to the solved case from the Hadi Sadat code? >> >> And if you have any questions about the MATPOWER case format or MATPOWER >> power flow options, feel free to ask. >> >> Ray >> >> >> >> On Mar 20, 2018, at 11:28 AM, Mohammed Alhajri <u106...@gmail.com> wrote: >> >> Ok, i have attached the case information in format of Hadi Saadat code, >> can you please try it in MATPOWER? >> >> because we have spent more than three weeks checking the format, but >> still dose not converge... >> >> Regards,,, >> >> بتاريخ ٢٠١٨/٠٣/٢٠ ٦:٢٦ م، كتب "Ray Zimmerman" <r...@cornell.edu>: >> >>> It’s possible that the modeling is not identical or that there is some >>> error in your conversion to MATPOWER format. You can check by talking the >>> solved case from your other software, converting that solved case to >>> MATPOWER and then trying the MATPOWER power flow. It should converge in a >>> single iteration. If it does not, then you know that there is either a >>> mistake somewhere or a difference in modeling. >>> >>>Ray >>> >>> >>> On Mar 16, 2018, at 12:42 PM, Mohammed Alhajri <u106...@gmail.com> >>> wrote: >>> >>> i tried that but unfortunately not work >>> >>> بتاريخ ٢٠١٨/٠٣/١٦ ٨:٣٠ م، كتب "Abhyankar, Shrirang G." <abhy...@anl.gov >>> >: >>> >>>> See FAQ #5 <http://www.pserc.cornell.edu/matpower/#pfconvergence> >>>> >>>> >>>> >>>> Thanks, >>>> >>>> Shri >>>> >>>> Ph: (630) 252 0219 <(630)%20252-0219> >>>> >>>> www.mcs.anl.gov/~abhyshr >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> *From: *<bounce-122387760-73493...@list.cornell.edu> on behalf of >>>> Mohammed Alhajri <u106...@gmail.com> >>>> *Reply-To: *MATPOWER discussion forum <matpowe...@list.cornell.edu> >>>> *Date: Friday, March 16, 2018 at 11:26 AM* >>>> *To: MATPOWER discussion forum <matpowe...@list.cornell.edu >>>> <matpowe...@list.cornell.edu>>* >>>> *Subject: Re: Power Flow in Matpower* >>>> >>>> >>>> >>>> any answer to this question? >>>> >>>> >>>> >>>> بتاريخ ٢٠١٨/٠٢/٢٥ ٧:١٨ م، كتب "Mohammed Alhajri" <u106...@gmail.com>: >>>> >>>> Hello All, >>>> >>>> >>>> >>>> I did the power flow for a 89-bus network and it converges using Hadi >>>> Sadat code after 17080 iterations. The accuracy was 1e-8 and the method is >>>> Gauss-Seidel Method. >>>> >>>> >>>> >>>> But when I did the power flow using matpower it does not converge! I >>>> tried to increase the maximum iteration, I put it 10, and still did not >>>> cnvarge! >>>> >>>> >>>> >>>> I have attached the data according to Hadi Sadat Code, can any one try >>>> to do the power flow using matpower? >>>> >>>> >>>> >>>> >>> >> >
Re: Power Flow in Matpower
i got 19980 NaN 19981 NaN 19982 NaN 19983 NaN 19984 NaN 19985 NaN 19986 NaN 19987 NaN 19988 NaN 19989 NaN 19990 NaN 19991 NaN 19992 NaN 19993 NaN 19994 NaN 19995 NaN 19996 NaN 19997 NaN 19998 NaN 1 NaN 2 NaN Gauss-Seidel power flow did not converge in 2 iterations. >>>>> Did NOT converge (47.99 seconds) <<<<< On 20 March 2018 at 19:44, Ray Zimmerman <r...@cornell.edu> wrote: > Unfortunately, I do not have time to work on this myself. I was just > giving a suggestion for another direction to try if you want to understand > the issue that MATPOWER is having with your case. Could you post the output > (using verbose set to 2) of runpf() when using a MATPOIWER case file that > corresponds to the solved case from the Hadi Sadat code? > > And if you have any questions about the MATPOWER case format or MATPOWER > power flow options, feel free to ask. > > Ray > > > > On Mar 20, 2018, at 11:28 AM, Mohammed Alhajri <u106...@gmail.com> wrote: > > Ok, i have attached the case information in format of Hadi Saadat code, > can you please try it in MATPOWER? > > because we have spent more than three weeks checking the format, but still > dose not converge... > > Regards,,, > > بتاريخ ٢٠١٨/٠٣/٢٠ ٦:٢٦ م، كتب "Ray Zimmerman" <r...@cornell.edu>: > >> It’s possible that the modeling is not identical or that there is some >> error in your conversion to MATPOWER format. You can check by talking the >> solved case from your other software, converting that solved case to >> MATPOWER and then trying the MATPOWER power flow. It should converge in a >> single iteration. If it does not, then you know that there is either a >> mistake somewhere or a difference in modeling. >> >>Ray >> >> >> On Mar 16, 2018, at 12:42 PM, Mohammed Alhajri <u106...@gmail.com> wrote: >> >> i tried that but unfortunately not work >> >> بتاريخ ٢٠١٨/٠٣/١٦ ٨:٣٠ م، كتب "Abhyankar, Shrirang G." <abhy...@anl.gov>: >> >>> See FAQ #5 <http://www.pserc.cornell.edu/matpower/#pfconvergence> >>> >>> >>> >>> Thanks, >>> >>> Shri >>> >>> Ph: (630) 252 0219 <(630)%20252-0219> >>> >>> www.mcs.anl.gov/~abhyshr >>> >>> >>> >>> >>> >>> >>> >>> *From: *<bounce-122387760-73493...@list.cornell.edu> on behalf of >>> Mohammed Alhajri <u106...@gmail.com> >>> *Reply-To: *MATPOWER discussion forum <matpowe...@list.cornell.edu> >>> *Date: Friday, March 16, 2018 at 11:26 AM* >>> *To: MATPOWER discussion forum <matpowe...@list.cornell.edu >>> <matpowe...@list.cornell.edu>>* >>> *Subject: Re: Power Flow in Matpower* >>> >>> >>> >>> any answer to this question? >>> >>> >>> >>> بتاريخ ٢٠١٨/٠٢/٢٥ ٧:١٨ م، كتب "Mohammed Alhajri" <u106...@gmail.com>: >>> >>> Hello All, >>> >>> >>> >>> I did the power flow for a 89-bus network and it converges using Hadi >>> Sadat code after 17080 iterations. The accuracy was 1e-8 and the method is >>> Gauss-Seidel Method. >>> >>> >>> >>> But when I did the power flow using matpower it does not converge! I >>> tried to increase the maximum iteration, I put it 10, and still did not >>> cnvarge! >>> >>> >>> >>> I have attached the data according to Hadi Sadat Code, can any one try >>> to do the power flow using matpower? >>> >>> >>> >>> >> >
Re: Power Flow in Matpower
196.0 528.4 > 92.0 > off - - - > - - > fixed 6416.2 5599.8 196.0 528.4 > 92.0 > dispatchable - - - > - - > on - - - > - - > off - - - > - - > reactive (MVAr) > dispatched 2125.7 1855.664.4 173.7 > 31.9 > fixed 2125.7 1855.664.4 173.7 > 31.9 > dispatchable - - - > - - > curtailed - - - > - - > nominal 2125.7 1855.664.4 173.7 > 31.9 > on 2125.7 1855.664.4 173.7 > 31.9 > off - - - > - - > fixed 2125.7 1855.664.4 173.7 > 31.9 > dispatchable - - - > - - > on - - - > - - > off - - - > - - > > Generation > active (MW) > dispatched 6621.8 6234.6 387.3 > - - > max capacity- - - > - - > on- - - > - - > off - - - > - - > min capacity- - - > - - > on- - - > - - > off - - - > - - > reactive (MVAr) > dispatched 2762.6 2601.0 161.7 > - - > max capacity- - - > - - > on- - - > - - > off - - - > - - > min capacity- - - > - - > on- - - > - - > off - - - > - - > > Shunt Injections > active (MW) - - - > - - > reactive (MVAr) 1934.0 1894.0 - - > 40.0 > > Branch Losses > active (MW) - - - > - - > reactive (MVAr) - - - > - - > > DC line > export (MW) > dispatch- - - > - - > max capacity- - - > - - > on- - - > - - > off - - - > - - > min capacity- - - > - - > on- - - > - - > off - - - > - - > > Reference Buses > num of ref buses 1 1 0 > 0 0 > ref bus numbers 27 27 > > > Is this what the data is supposed to represent? > > Carlos. > > Mohammed Alhajri wrote: > > Ok, i have attached the case information in format of Hadi Saadat code, > can you please try it in MATPOWER? > > because we have spent more than three weeks checking the format, but still > dose not converge... > > Regards,,, > > بتاريخ ٢٠١٨/٠٣/٢٠ ٦:٢٦ م، كتب "Ray Zimmerman" <r...@cornell.edu>: > >> It’s possible that the modeling is not identical or that there is some >> error in your conversion to MATPOWER format. You can check by talking the >> solved case from your other software, converting that solved case to >> MATPOWER and then trying the MATPOWER power flow. It should converge in a >> single iteration. If it does not, then you know that there is either a >> mistake somewhere or a difference in modeling. >> >>Ray >> >> >> On Mar 16, 2018, at 12:42 PM, Mohammed Alhajri <u106...@gmail.com> wrote: >> >> i tried that but unfortunately not work >> >> بتاريخ ٢٠١٨/٠٣/١٦ ٨:٣٠ م، كتب "Abhyankar, Shrirang G." < >> <abhy...@anl.gov>abhy...@anl.gov>: >> >>> See FAQ #5 <http://www.pserc.cornell.edu/matpower/#pfconvergence> >>> >>> >>> >>> Thanks, >>> >>> Shri >>> >>> Ph: (630) 2
Re: Power Flow in Matpower
this is the *.m file of the case On 21 March 2018 at 02:01, André Silva <caussi...@gmail.com> wrote: > Hi Mohammed, > > > It is easier for anyone here to make an objective analysis of your case, > if you provide the network refered in Hadi Saadat alterady converted into > the MatPower version 2 network case format. You just have to adapt your > excel network information sheets into an *.m file > > > Typically any Power Flow execution for any given network case takes less > than a dozen or so iterations to converge. This is verifiable not only for > small networks, but also for networks with thousands of nodes. > > > Best regards, > > André > > 2018-02-25 15:18 GMT+00:00 Mohammed Alhajri <u106...@gmail.com>: > >> Hello All, >> >> I did the power flow for a 89-bus network and it converges using Hadi >> Sadat code after 17080 iterations. The accuracy was 1e-8 and the method is >> Gauss-Seidel Method. >> >> >> >> But when I did the power flow using matpower it does not converge! I >> tried to increase the maximum iteration, I put it 10, and still did not >> cnvarge! >> >> >> >> I have attached the data according to Hadi Sadat Code, can any one try to >> do the power flow using matpower? >> >> > OETC_PF.m Description: Binary data
Re: Power Flow in Matpower
off - - -
- -
reactive (MVAr)
dispatched 2762.6 2601.0 161.7
- -
max capacity - - -
- -
on - - -
- -
off - - -
- -
min capacity - - -
- -
on - - -
- -
off - - -
- -
Shunt Injections
active (MW) - - -
- -
reactive (MVAr) 1934.0 1894.0 -
- 40.0
Branch Losses
active (MW) - - -
- -
reactive (MVAr) - - -
- -
DC line
export (MW)
dispatch - - -
- -
max capacity - - -
- -
on - - -
- -
off - - -
- -
min capacity - - -
- -
on - - -
- -
off - - -
- -
Reference Buses
num of ref buses 1 1 0
0 0
ref bus numbers 27
27
Is this what the data is supposed to represent?
Carlos.
Mohammed Alhajri wrote:
Ok, i have attached the case information in format
of Hadi Saadat code, can you please try it in MATPOWER?
because we have spent more than three weeks
checking the format, but still dose not converge...
Regards,,,
بتاريخ ٢٠١٨/٠٣/٢٠ ٦:٢٦ م، كتب "Ray
Zimmerman" <r...@cornell.edu>:
It’s
possible that the modeling is not identical or that there
is some error in your conversion to MATPOWER format. You
can check by talking the solved case from your other
software, converting that solved case to MATPOWER and then
trying the MATPOWER power flow. It should converge in a
single iteration. If it does not, then you know that there
is either a mistake somewhere or a difference in modeling.
Ray
On Mar 16, 2018, at 12:42 PM, Mohammed Alhajri
<u106...@gmail.com>
wrote:
i tried that but unfortunately not
work
بتاريخ ٢٠١٨/٠٣/١٦
٨:٣٠ م، كتب "Abhyankar, Shrirang G." <abhy...@anl.gov>:
See FAQ #5
Thanks,
Shri
Ph: (630) 252 0219
www.mcs.anl.gov/~abhyshr
From:
<bounce-122387760-73493617@list.cornell.edu>
on behalf of Mohammed Alhajri <u106...@gmail.com>
Reply-To:
MATPOWER discussion forum <matpowe...@list.cornell.edu>
Date:
Friday, Marc
Re: Power Flow in Matpower
Hi Mohammed, It is easier for anyone here to make an objective analysis of your case, if you provide the network refered in Hadi Saadat alterady converted into the MatPower version 2 network case format. You just have to adapt your excel network information sheets into an *.m file Typically any Power Flow execution for any given network case takes less than a dozen or so iterations to converge. This is verifiable not only for small networks, but also for networks with thousands of nodes. Best regards, André 2018-02-25 15:18 GMT+00:00 Mohammed Alhajri <u106...@gmail.com>: > Hello All, > > I did the power flow for a 89-bus network and it converges using Hadi > Sadat code after 17080 iterations. The accuracy was 1e-8 and the method is > Gauss-Seidel Method. > > > > But when I did the power flow using matpower it does not converge! I tried > to increase the maximum iteration, I put it 10, and still did not > cnvarge! > > > > I have attached the data according to Hadi Sadat Code, can any one try to > do the power flow using matpower? > >
Re: Power Flow in Matpower
Ok, i have attached the case information in format of Hadi Saadat code, can you please try it in MATPOWER? because we have spent more than three weeks checking the format, but still dose not converge... Regards,,, بتاريخ ٢٠١٨/٠٣/٢٠ ٦:٢٦ م، كتب "Ray Zimmerman" <r...@cornell.edu>: > It’s possible that the modeling is not identical or that there is some > error in your conversion to MATPOWER format. You can check by talking the > solved case from your other software, converting that solved case to > MATPOWER and then trying the MATPOWER power flow. It should converge in a > single iteration. If it does not, then you know that there is either a > mistake somewhere or a difference in modeling. > >Ray > > > On Mar 16, 2018, at 12:42 PM, Mohammed Alhajri <u106...@gmail.com> wrote: > > i tried that but unfortunately not work > > بتاريخ ٢٠١٨/٠٣/١٦ ٨:٣٠ م، كتب "Abhyankar, Shrirang G." <abhy...@anl.gov>: > >> See FAQ #5 <http://www.pserc.cornell.edu/matpower/#pfconvergence> >> >> >> >> Thanks, >> >> Shri >> >> Ph: (630) 252 0219 <(630)%20252-0219> >> >> www.mcs.anl.gov/~abhyshr >> >> >> >> >> >> >> >> *From: *<bounce-122387760-73493...@list.cornell.edu> on behalf of >> Mohammed Alhajri <u106...@gmail.com> >> *Reply-To: *MATPOWER discussion forum <matpowe...@list.cornell.edu> >> *Date: Friday, March 16, 2018 at 11:26 AM* >> *To: MATPOWER discussion forum <matpowe...@list.cornell.edu >> <matpowe...@list.cornell.edu>>* >> *Subject: Re: Power Flow in Matpower* >> >> >> >> any answer to this question? >> >> >> >> بتاريخ ٢٠١٨/٠٢/٢٥ ٧:١٨ م، كتب "Mohammed Alhajri" <u106...@gmail.com>: >> >> Hello All, >> >> >> >> I did the power flow for a 89-bus network and it converges using Hadi >> Sadat code after 17080 iterations. The accuracy was 1e-8 and the method is >> Gauss-Seidel Method. >> >> >> >> But when I did the power flow using matpower it does not converge! I >> tried to increase the maximum iteration, I put it 10, and still did not >> cnvarge! >> >> >> >> I have attached the data according to Hadi Sadat Code, can any one try to >> do the power flow using matpower? >> >> >> >> >
Re: Power Flow in Matpower
It’s possible that the modeling is not identical or that there is some error in your conversion to MATPOWER format. You can check by talking the solved case from your other software, converting that solved case to MATPOWER and then trying the MATPOWER power flow. It should converge in a single iteration. If it does not, then you know that there is either a mistake somewhere or a difference in modeling. Ray > On Mar 16, 2018, at 12:42 PM, Mohammed Alhajri <u106...@gmail.com> wrote: > > i tried that but unfortunately not work > > بتاريخ ٢٠١٨/٠٣/١٦ ٨:٣٠ م، كتب "Abhyankar, Shrirang G." <abhy...@anl.gov > <mailto:abhy...@anl.gov>>: > See FAQ #5 <http://www.pserc.cornell.edu/matpower/#pfconvergence> > > > Thanks, > > Shri > > Ph: (630) 252 0219 <tel:(630)%20252-0219> > www.mcs.anl.gov/~abhyshr <http://www.mcs.anl.gov/~abhyshr> > > > > > > > From: <bounce-122387760-73493...@list.cornell.edu > <mailto:bounce-122387760-73493...@list.cornell.edu>> on behalf of Mohammed > Alhajri <u106...@gmail.com <mailto:u106...@gmail.com>> > Reply-To: MATPOWER discussion forum <matpowe...@list.cornell.edu > <mailto:matpowe...@list.cornell.edu>> > Date: Friday, March 16, 2018 at 11:26 AM > To: MATPOWER discussion forum <matpowe...@list.cornell.edu > <mailto:matpowe...@list.cornell.edu>> > Subject: Re: Power Flow in Matpower > > > > any answer to this question? > > > > بتاريخ ٢٠١٨/٠٢/٢٥ ٧:١٨ م، كتب "Mohammed Alhajri" <u106...@gmail.com > <mailto:u106...@gmail.com>>: > > Hello All, > > > > I did the power flow for a 89-bus network and it converges using Hadi Sadat > code after 17080 iterations. The accuracy was 1e-8 and the method is > Gauss-Seidel Method. > > > > But when I did the power flow using matpower it does not converge! I tried to > increase the maximum iteration, I put it 10, and still did not cnvarge! > > > > I have attached the data according to Hadi Sadat Code, can any one try to do > the power flow using matpower? > > >
Re: Power Flow in Matpower
i tried that but unfortunately not work بتاريخ ٢٠١٨/٠٣/١٦ ٨:٣٠ م، كتب "Abhyankar, Shrirang G." <abhy...@anl.gov>: > See FAQ #5 <http://www.pserc.cornell.edu/matpower/#pfconvergence> > > > > Thanks, > > Shri > > Ph: (630) 252 0219 <(630)%20252-0219> > > www.mcs.anl.gov/~abhyshr > > > > > > > > *From: *<bounce-122387760-73493...@list.cornell.edu> on behalf of > Mohammed Alhajri <u106...@gmail.com> > *Reply-To: *MATPOWER discussion forum <matpowe...@list.cornell.edu> > *Date: *Friday, March 16, 2018 at 11:26 AM > *To: *MATPOWER discussion forum <matpowe...@list.cornell.edu> > *Subject: *Re: Power Flow in Matpower > > > > any answer to this question? > > > > بتاريخ ٢٠١٨/٠٢/٢٥ ٧:١٨ م، كتب "Mohammed Alhajri" <u106...@gmail.com>: > > Hello All, > > > > I did the power flow for a 89-bus network and it converges using Hadi > Sadat code after 17080 iterations. The accuracy was 1e-8 and the method is > Gauss-Seidel Method. > > > > But when I did the power flow using matpower it does not converge! I tried > to increase the maximum iteration, I put it 10, and still did not > cnvarge! > > > > I have attached the data according to Hadi Sadat Code, can any one try to > do the power flow using matpower? > > > >
Re: Power Flow in Matpower
See FAQ #5<http://www.pserc.cornell.edu/matpower/#pfconvergence> Thanks, Shri Ph: (630) 252 0219 www.mcs.anl.gov/~abhyshr<http://www.mcs.anl.gov/~abhyshr> From: <bounce-122387760-73493...@list.cornell.edu> on behalf of Mohammed Alhajri <u106...@gmail.com> Reply-To: MATPOWER discussion forum <matpowe...@list.cornell.edu> Date: Friday, March 16, 2018 at 11:26 AM To: MATPOWER discussion forum <matpowe...@list.cornell.edu> Subject: Re: Power Flow in Matpower any answer to this question? بتاريخ ٢٠١٨/٠٢/٢٥ ٧:١٨ م، كتب "Mohammed Alhajri" <u106...@gmail.com<mailto:u106...@gmail.com>>: Hello All, I did the power flow for a 89-bus network and it converges using Hadi Sadat code after 17080 iterations. The accuracy was 1e-8 and the method is Gauss-Seidel Method. But when I did the power flow using matpower it does not converge! I tried to increase the maximum iteration, I put it 10, and still did not cnvarge! I have attached the data according to Hadi Sadat Code, can any one try to do the power flow using matpower?
Re: Power Flow in Matpower
any answer to this question? بتاريخ ٢٠١٨/٠٢/٢٥ ٧:١٨ م، كتب "Mohammed Alhajri" <u106...@gmail.com>: > Hello All, > > I did the power flow for a 89-bus network and it converges using Hadi > Sadat code after 17080 iterations. The accuracy was 1e-8 and the method is > Gauss-Seidel Method. > > > > But when I did the power flow using matpower it does not converge! I tried > to increase the maximum iteration, I put it 10, and still did not > cnvarge! > > > > I have attached the data according to Hadi Sadat Code, can any one try to > do the power flow using matpower? > >
Re: Help on the reactive power flow in matpower.
The power loss (real and reactive) in a branch is given by s_f + s_t, where ...
s_f = v_f * conj(i_f)
s_t = v_t * conj(i_t)
... and i_f and i_t are computed via (3.1) and (3.2) in the manual.
--
Ray Zimmerman
Senior Research Associate
211 Warren Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Apr 25, 2011, at 10:59 AM, z qin wrote:
Hello,
When I calculate the power flow from bus i to bus j, I set
Sij=Pij+1j*Qij=V_i*(I_ij^*). From the real part, I get Pij, which matches the
result of matpower. From the imaginary part, I get Qij, which doesn't match
the result of matpower. So what is wrong with my calculation? Thanks.
Jerry.
On Sun, Apr 24, 2011 at 11:51 PM, jigna pandya jigna_pandya2...@yahoo.com
wrote:
hello,
Reactive power flow balance equation is as follows:
Qgeneration+Qcharging=Qload+Qloss .
(Due to presence of capacitive effect, transmission line injects reactive
power in to the system.)
so Qfrombus+Qtobus=Qloss doesn't hold.
regards
From: z qin zhengr...@gmail.com
To: matpower-l matpowe...@cornell.edu
Sent: Mon, April 25, 2011 8:19:11 AM
Subject: Help on the reactive power flow in matpower.
Hello,
I ran runopf('case9.m') and got the result below. In some branches (1, 4 and
7), Qfrombus+Qtobus=Qloss. However for the rest branches,
Qfrombus+Qtobus=Qloss doesn't hold. Could someone explain for me? I had
thought that
Qij=|Vi|*|Vi|*Bij+|Vi|*|Vj|*(Gij*sin(theta_i-theta_j)-Bij*cos(theta_i-theta_j),
but it seems that it is wrong. Thanks a lot.
Btw, here is how I calculate Pij and Qij. Sij=Pij+1j*Qij=V_i*(I_ij^*), from
the real part, I get Pij, which seems correct; from the imaginary part, I got
Qij, which seems wrong.
Best,
Jerry.
Branch Data |
Brnch From ToFrom Bus Injection To Bus Injection Loss (I^2 * Z)
# BusBusP (MW) Q (MVAr) P (MW) Q (MVAr) P (MW) Q
(MVAr)
- - -
1 1 4 89.80 12.94-89.80 -9.02 0.000 3.92
2 4 5 35.22 -3.90-35.04-13.87 0.181 0.98
3 5 6-54.96-16.13 55.97-22.18 1.010 4.40
4 3 6 94.19-22.62-94.19 27.28 0.000 4.66
5 6 7 38.22 -5.10-38.07-18.68 0.149 1.26
6 7 8-61.93-16.32 62.21 0.82 0.279 2.36
7 8 2 -134.32 9.32134.32 0.05 0.000 9.36
8 8 9 72.11-10.14-70.72-18.94 1.394 7.01
9 9 4-54.28-31.06 54.58 12.92 0.295 2.51
--
Zhengrui (Jerry) Qin
Computer Science
College of William and Mary
Williamsburg, VA 23185
Re: Help on the reactive power flow in matpower.
Jigna,
Thank you very much. Do you know the formula to calculate the reactive power
flow on a branch if we know the impedance of the branch and the voltage
vector of the two buses? Thanks.
Best,
Jerry
On Sun, Apr 24, 2011 at 11:51 PM, jigna pandya
jigna_pandya2...@yahoo.comwrote:
hello,
Reactive power flow balance equation is as follows:
Qgeneration+Qcharging=Qload+Qloss .
(Due to presence of capacitive effect, transmission line injects reactive
power in to the system.)
so Qfrombus+Qtobus=Qloss doesn't hold.
regards
--
*From:* z qin zhengr...@gmail.com
*To:* matpower-l matpowe...@cornell.edu
*Sent:* Mon, April 25, 2011 8:19:11 AM
*Subject:* Help on the reactive power flow in matpower.
Hello,
I ran runopf('case9.m') and got the result below. In some branches (1, 4
and 7), Qfrombus+Qtobus=Qloss. However for the rest branches,
Qfrombus+Qtobus=Qloss doesn't hold. Could someone explain for me? I had
thought that
Qij=|Vi|*|Vi|*Bij+|Vi|*|Vj|*(Gij*sin(theta_i-theta_j)-Bij*cos(theta_i-theta_j),
but it seems that it is wrong. Thanks a lot.
Btw, here is how I calculate Pij and Qij. Sij=Pij+1j*Qij=V_i*(I_ij^*), from
the real part, I get Pij, which seems correct; from the imaginary part, I
got Qij, which seems wrong.
Best,
Jerry.
Branch Data |
Brnch From ToFrom Bus Injection To Bus Injection Loss (I^2 *
Z)
# BusBusP (MW) Q (MVAr) P (MW) Q (MVAr) P (MW) Q
(MVAr)
- - -
1 1 4 89.80 12.94-89.80 -9.02 0.000
3.92
2 4 5 35.22 -3.90-35.04-13.87 0.181
0.98
3 5 6-54.96-16.13 55.97-22.18 1.010
4.40
4 3 6 94.19-22.62-94.19 27.28 0.000
4.66
5 6 7 38.22 -5.10-38.07-18.68 0.149
1.26
6 7 8-61.93-16.32 62.21 0.82 0.279
2.36
7 8 2 -134.32 9.32134.32 0.05 0.000
9.36
8 8 9 72.11-10.14-70.72-18.94 1.394
7.01
9 9 4-54.28-31.06 54.58 12.92 0.295
2.51
--
Zhengrui (Jerry) Qin
Computer Science
College of William and Mary
Williamsburg, VA 23185
Re: Help on the reactive power flow in matpower.
Hello,
When I calculate the power flow from bus i to bus j, I set
Sij=Pij+1j*Qij=V_i*(I_ij^*). From the real part, I get Pij, which matches
the result of matpower. From the imaginary part, I get Qij, which doesn't
match the result of matpower. So what is wrong with my calculation? Thanks.
Jerry.
On Sun, Apr 24, 2011 at 11:51 PM, jigna pandya
jigna_pandya2...@yahoo.comwrote:
hello,
Reactive power flow balance equation is as follows:
Qgeneration+Qcharging=Qload+Qloss .
(Due to presence of capacitive effect, transmission line injects reactive
power in to the system.)
so Qfrombus+Qtobus=Qloss doesn't hold.
regards
--
*From:* z qin zhengr...@gmail.com
*To:* matpower-l matpowe...@cornell.edu
*Sent:* Mon, April 25, 2011 8:19:11 AM
*Subject:* Help on the reactive power flow in matpower.
Hello,
I ran runopf('case9.m') and got the result below. In some branches (1, 4
and 7), Qfrombus+Qtobus=Qloss. However for the rest branches,
Qfrombus+Qtobus=Qloss doesn't hold. Could someone explain for me? I had
thought that
Qij=|Vi|*|Vi|*Bij+|Vi|*|Vj|*(Gij*sin(theta_i-theta_j)-Bij*cos(theta_i-theta_j),
but it seems that it is wrong. Thanks a lot.
Btw, here is how I calculate Pij and Qij. Sij=Pij+1j*Qij=V_i*(I_ij^*), from
the real part, I get Pij, which seems correct; from the imaginary part, I
got Qij, which seems wrong.
Best,
Jerry.
Branch Data |
Brnch From ToFrom Bus Injection To Bus Injection Loss (I^2 *
Z)
# BusBusP (MW) Q (MVAr) P (MW) Q (MVAr) P (MW) Q
(MVAr)
- - -
1 1 4 89.80 12.94-89.80 -9.02 0.000
3.92
2 4 5 35.22 -3.90-35.04-13.87 0.181
0.98
3 5 6-54.96-16.13 55.97-22.18 1.010
4.40
4 3 6 94.19-22.62-94.19 27.28 0.000
4.66
5 6 7 38.22 -5.10-38.07-18.68 0.149
1.26
6 7 8-61.93-16.32 62.21 0.82 0.279
2.36
7 8 2 -134.32 9.32134.32 0.05 0.000
9.36
8 8 9 72.11-10.14-70.72-18.94 1.394
7.01
9 9 4-54.28-31.06 54.58 12.92 0.295
2.51
--
Zhengrui (Jerry) Qin
Computer Science
College of William and Mary
Williamsburg, VA 23185
Help on the reactive power flow in matpower.
Hello,
I ran runopf('case9.m') and got the result below. In some branches (1, 4
and 7), Qfrombus+Qtobus=Qloss. However for the rest branches,
Qfrombus+Qtobus=Qloss doesn't hold. Could someone explain for me? I had
thought that
Qij=|Vi|*|Vi|*Bij+|Vi|*|Vj|*(Gij*sin(theta_i-theta_j)-Bij*cos(theta_i-theta_j),
but it seems that it is wrong. Thanks a lot.
Btw, here is how I calculate Pij and Qij. Sij=Pij+1j*Qij=V_i*(I_ij^*), from
the real part, I get Pij, which seems correct; from the imaginary part, I
got Qij, which seems wrong.
Best,
Jerry.
Branch Data |
Brnch From ToFrom Bus Injection To Bus Injection Loss (I^2 *
Z)
# BusBusP (MW) Q (MVAr) P (MW) Q (MVAr) P (MW) Q
(MVAr)
- - -
1 1 4 89.80 12.94-89.80 -9.02 0.000
3.92
2 4 5 35.22 -3.90-35.04-13.87 0.181
0.98
3 5 6-54.96-16.13 55.97-22.18 1.010
4.40
4 3 6 94.19-22.62-94.19 27.28 0.000
4.66
5 6 7 38.22 -5.10-38.07-18.68 0.149
1.26
6 7 8-61.93-16.32 62.21 0.82 0.279
2.36
7 8 2 -134.32 9.32134.32 0.05 0.000
9.36
8 8 9 72.11-10.14-70.72-18.94 1.394
7.01
9 9 4-54.28-31.06 54.58 12.92 0.295
2.51
Re: Help on the reactive power flow in matpower.
hello,
Reactive power flow balance equation is as follows:
Qgeneration+Qcharging=Qload+Qloss .
(Due to presence of capacitive effect, transmission line injects reactive power
in to the system.)
so Qfrombus+Qtobus=Qloss doesn't hold.
regards
From: z qin zhengr...@gmail.com
To: matpower-l matpowe...@cornell.edu
Sent: Mon, April 25, 2011 8:19:11 AM
Subject: Help on the reactive power flow in matpower.
Hello,
I ran runopf('case9.m') and got the result below. In some branches (1, 4 and
7), Qfrombus+Qtobus=Qloss. However for the rest branches,
Qfrombus+Qtobus=Qloss
doesn't hold. Could someone explain for me? I had thought that
Qij=|Vi|*|Vi|*Bij+|Vi|*|Vj|*(Gij*sin(theta_i-theta_j)-Bij*cos(theta_i-theta_j),
but it seems that it is wrong. Thanks a lot.
Btw, here is how I calculate Pij and Qij. Sij=Pij+1j*Qij=V_i*(I_ij^*), from
the
real part, I get Pij, which seems correct; from the imaginary part, I got Qij,
which seems wrong.
Best,
Jerry.
Branch Data |
Brnch From ToFrom Bus Injection To Bus Injection Loss (I^2 * Z)
# BusBusP (MW) Q (MVAr) P (MW) Q (MVAr) P (MW) Q (MVAr)
- - -
1 1 4 89.80 12.94-89.80 -9.02 0.000 3.92
2 4 5 35.22 -3.90-35.04-13.87 0.181 0.98
3 5 6-54.96-16.13 55.97-22.18 1.010 4.40
4 3 6 94.19-22.62-94.19 27.28 0.000 4.66
5 6 7 38.22 -5.10-38.07-18.68 0.149 1.26
6 7 8-61.93-16.32 62.21 0.82 0.279 2.36
7 8 2 -134.32 9.32134.32 0.05 0.000 9.36
8 8 9 72.11-10.14-70.72-18.94 1.394 7.01
9 9 4-54.28-31.06 54.58 12.92 0.295 2.51
