Dear all, you both suggested me to go for opf but when i tried the 16 bus system it's saying
*''Numerically FailedDid not converge in 5 iterations.>>>>> Did NOT converge (1.34 seconds) <<<<<''* what are the reasons behind it ? what will be the remedy ? waiting for your answers? Thanks. On Fri, Jan 27, 2017 at 9:34 PM, Abhyankar, Shrirang G. <[email protected]> wrote: > You can make an OPF mimic a PF by relaxing the constraints (line flow, > voltage constraints) and setting the cost function to zero. (by setting > values in mpc.gencost = 0) > > Shri > > From: siddique tomal <[email protected]> > Reply-To: MATPOWER discussion forum <[email protected]> > Date: Friday, January 27, 2017 at 7:26 AM > To: MATPOWER discussion forum <[email protected]> > Subject: Re: AW: Bus Voltage Constraints > > Dear Leon Thurber, > Thanks again . the cause behind I don't want to use OPF is I want to > optimize the cost funtion by my own developed program. Here I just need > simple load flow to study the developed program. > Thanks > > On Jan 27, 2017 7:21 PM, "Leon Thurner" <[email protected]> > wrote: > >> Dear Siddique Tomal, >> >> >> >> again, that sounds exactly like a problem that one would solve with an >> optimal power flow. The OPF allows yout to define costs for active/reactive >> power, constraints for vmin/vmax and then to find the network state that >> minimizes the cost function while complying with all constraints. What is >> the reason you don’t want to or can’t use an OPF for this? >> >> >> >> Best >> >> Leon >> >> >> >> *Von:*[email protected] [mailto: >> [email protected]] *Im Auftrag von *siddique >> tomal >> *Gesendet:* Freitag, 27. Januar 2017 13:57 >> *An:* MATPOWER discussion forum <[email protected]> >> *Betreff:* Re: Bus Voltage Constraints >> >> >> >> Dear Leon Thurner, >> >> Thanks for the reply. Actually in my work the active and reactive wont be >> fixed. I will change the value of both power more specifically the reactive >> power frequently to have a best value my cost function. And as the power is >> not fixed here so bus voltage is changeable. And here i want to put a limit >> for the change of bus voltage. Hope you understand and help me to find a >> way to solve. >> >> Thanks >> >> >> >> On Fri, Jan 27, 2017 at 6:46 PM, Leon Thurner <[email protected]> >> wrote: >> >> Dear Siddique Tomal, >> >> >> >> having constraints for bus voltages is only possible if you have >> flexibilities that allow you to keep those constraints. In a normal power >> flow you do not have these flexibilties, since active and reactive power is >> fixed at most buses. What you ask for is only possible with an OPF and is >> in fact exactly what the OPF is designed to do. >> >> >> >> Regards >> >> Leon >> >> >> >> *Von:*[email protected] [mailto: >> [email protected]] *Im Auftrag von *siddique >> tomal >> *Gesendet:* Freitag, 27. Januar 2017 13:33 >> *An:* [email protected] >> *Betreff:* Bus Voltage Constraints >> >> >> >> Dear all, >> >> i have a query about bus voltage constraints in normal power flow. I want >> to set a limit for every bus voltage (+-5%). So I’m asking help regarding >> this fact. It is just like* 'vmax'* and *'vmin'* column in *bus data >> matrix* works only in optimal power flow. but i need this feature for >> normal power flow. >> >> Thanks >> >> >> >
