Dear Carlos, The 64 bus from me is not the same with IEEE bus, it's the real distribution network with the real data.
On Thu, 11 Apr 2019, 05:04 Carlos A. Castro, <[email protected]> wrote: > Dear Putu > > I have not run your whole program. I did run a power flow for the 64-bus > system. > > The system is all connected, that is, there are no islands. > > The power flow runs smoothly, and converges after 3 iterations. My > experience shows that Newton's method runs very well for distribution > systems, contrary to some beliefs. Decoupled methods are the ones that may > fail for distribution systems. > > I would suggest that you debug your program to see whether there is > anything wrong with it. For instance, suppose that your program defines a > branch to be opened, causing an island. The power flow would diverge in > this situation. Actually, Matpower allows you to find it out before running > a power flow, which is a very good thing to do. > > In short, the problem iis certainly not related to the system data. > > Regards, > > > > Em ter, 9 de abr de 2019 às 13:53, Nitya Kirana <[email protected]> > escreveu: > >> Dear Carlos, >> >> Here is my program, please run it more than once, because the result will >> be different for every run, thank you. >> *Best Regards,* >> >> *Putu Diah Nitya Kirana,* >> >> Assistant and Researcher at Electric Energy Conversion Laboratory B101 >> Electrical Engineering Department >> Faculty of Electrical Technology >> Institut Teknologi Sepuluh Nopember >> Surabaya, Indonesia >> >> +62 8170 3178 248 >> >> >> >> On Tue, 9 Apr 2019 at 23:39, Carlos A. Castro <[email protected]> wrote: >> >>> Would you please send me de data file (.m)? I'll try to run it here. >>> >>> ---------- Forwarded message --------- >>> De: Nitya Kirana <[email protected]> >>> Date: ter, 9 de abr de 2019 às 01:53 >>> Subject: Re: Network Reconfiguration >>> To: MATPOWER discussion forum <[email protected]> >>> >>> >>> Dear Carlos A. Castro, >>> >>> Thank you before. I've done the replacement and the buses are all >>> correct, because I draw the single line diagram first and then input the >>> data in Matlab. Is there any other solution? >>> *Best Regards,* >>> >>> *Putu Diah Nitya Kirana,* >>> >>> Assistant and Researcher at Electric Energy Conversion Laboratory B101 >>> Electrical Engineering Department >>> Faculty of Electrical Technology >>> Institut Teknologi Sepuluh Nopember >>> Surabaya, Indonesia >>> >>> +62 8170 3178 248 >>> >>> >>> >>> On Tue, 9 Apr 2019 at 00:47, Carlos A. Castro <[email protected]> >>> wrote: >>> >>>> Dear Nitya >>>> >>>> I would do two things: >>>> >>>> 1. I would replace all commas "," by points "." in the data file. >>>> >>>> 2. I would try to draw the one line diagram of the network based on the >>>> data, to check whether the network is all connected, that is, that there >>>> are no isolated buses or group of buses, >>>> >>>> Good luck, >>>> >>>> Carlos >>>> >>>> >>>> Em seg, 8 de abr de 2019 às 14:42, Nitya Kirana < >>>> [email protected]> escreveu: >>>> >>>>> Dear all, >>>>> >>>>> I have run the power flow of 64 radial test bus system using Newton >>>>> Raphson in Matpower 4.1. It shows the result of power losses but it >>>>> doesn't converge, whenever I run the matlab, the result is always >>>>> different, and I don't know what's the problem. Can anyone help me? >>>>> because >>>>> this is my final project. It shows "Warning: Matrix is singular to >>>>> working precision." >>>>> >>>>> So, here is my data : >>>>> >>>>> bus data >>>>> bus type Pd Qd Gs Bs >>>>> area Vm Va baseKV zone Vmax Vmin >>>>> 1 3 0 0 0 0 1 1 0 20 1 1 0,9 >>>>> 2 3 0 0 0 0 1 1 0 20 1 1 0,9 >>>>> 3 3 0 0 0 0 1 1 0 20 1 1 0,9 >>>>> 4 1 0,0136 0,016256 0 0 1 1 0 20 1 1 0,9 >>>>> 5 1 0,0204 0,024384 0 0 1 1 0 20 1 1 0,9 >>>>> 6 1 0 0 0 0 1 1 0 20 1 1 0,9 >>>>> 7 1 0,07684 0,091846 0 0 1 1 0 20 1 1 0,9 >>>>> 8 1 0,02856 0,034138 0 0 1 1 0 20 1 1 0,9 >>>>> 9 1 0,03808 0,045517 0 0 1 1 0 20 1 1 0,9 >>>>> 10 1 0,0238 0,028448 0 0 1 1 0 20 1 1 0,9 >>>>> 11 1 0,01768 0,021133 0 0 1 1 0 20 1 1 0,9 >>>>> 12 1 0,017 0,02032 0 0 1 1 0 20 1 1 0,9 >>>>> 13 1 0,022304 0,02666 0 0 1 1 0 20 1 1 0,9 >>>>> 14 1 0,0204 0,002438 0 0 1 1 0 20 1 1 0,9 >>>>> 15 1 0,05848 0,069901 0 0 1 1 0 20 1 1 0,9 >>>>> 16 1 0,26384 0,315366 0 0 1 1 0 20 1 1 0,9 >>>>> 17 1 0,03774 0,04511 0 0 1 1 0 20 1 1 0,9 >>>>> 18 1 0,0204 0,002438 0 0 1 1 0 20 1 1 0,9 >>>>> 19 1 0,05576 0,06665 0 0 1 1 0 20 1 1 0,9 >>>>> 20 1 0,0136 0,016256 0 0 1 1 0 20 1 1 0,9 >>>>> 21 1 0,0306 0,016256 0 0 1 1 0 20 1 1 0,9 >>>>> 22 1 0,0204 0,024384 0 0 1 1 0 20 1 1 0,9 >>>>> 23 1 0,0272 0,032512 0 0 1 1 0 20 1 1 0,9 >>>>> 24 1 0,11764 0,140614 0 0 1 1 0 20 1 1 0,9 >>>>> 25 1 0,0068 0,008128 0 0 1 1 0 20 1 1 0,9 >>>>> 26 1 0,0136 0,016256 0 0 1 1 0 20 1 1 0,9 >>>>> 27 1 0,0238 0,028448 0 0 1 1 0 20 1 1 0,9 >>>>> 28 1 0,112948 0,135006 0 0 1 1 0 20 1 1 0,9 >>>>> 29 1 0,02176 0,02601 0 0 1 1 0 20 1 1 0,9 >>>>> 30 1 0 0 0 0 1 1 0 20 1 1 0,9 >>>>> 31 1 0,01768 0,021133 0 0 1 1 0 20 1 1 0,9 >>>>> 32 1 0,05168 0,061773 0 0 1 1 0 20 1 1 0,9 >>>>> 33 1 0,03468 0,041453 0 0 1 1 <td align="right" >>>>> style="padding-top:1px;padding-right:1px;padding-left:1px;color:black;f >>>>> >>>>
