I haven't implemented anything like this. I was just suggesting a general approach that you might consider when choosing your own algorithm and implementing your own code.
For a single OLTC, I imagine that a simple greedy search algorithm might be adequate, but you will have to make that judgement. That is, run the simulation, then try increasing the tap ratio and run again. If that improves the voltage, continue increasing it little by little until it stops improving the voltage. If it makes it worse, then decrease the tap ratio little by little until it stops improving the voltage. Hope this helps get you started. -- Ray Zimmerman Senior Research Associate 419A Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645 On Jan 27, 2012, at 10:04 AM, Dailan Xu wrote: > Sorry, but I didn't understand how you implemented one OLTC in a simple case > in order to control the voltage, centrally? > > Could you please introduce one of the ways of that you told and also explain > the following sentences, if possible: "there are numerous ways to compute the > updates to the tap settings", "Except for a very simply case with a tiny > number of OLTC and controlled voltages, finding an optimal (or even function) > strategy for the updates would probably require deriving formulae for the > sensitivities and implementing an update scheme based on them". > > Best Regards > > D. Xu > > > > On Fri, Jan 27, 2012 at 15:27, Ray Zimmerman <[email protected]> wrote: > There is in the list archive a response to the message you linked to ... > > http://www.mail-archive.com/[email protected]/msg01612.html > > ... that contains some pseudo-code outlining the idea. I'm not quite sure > what you mean by "I did it but it doesn't work". Obviously, there are > numerous ways to compute the updates to the tap settings. What did you try > and what happened? > > Except for a very simply case with a tiny number of OLTC and controlled > voltages, finding an optimal (or even function) strategy for the updates > would probably require deriving formulae for the sensitivities and > implementing an update scheme based on them. Of course, that's beyond the > scope of what I have time to work out for you. You would have to derive it > yourself from the power flow equations. > > -- > Ray Zimmerman > Senior Research Associate > 419A Warren Hall, Cornell University, Ithaca, NY 14853 > phone: (607) 255-9645 > > > > On Jan 27, 2012, at 6:15 AM, Dailan Xu wrote: > >> Dear Dr. Zimmerman, >> >> Could you please let me know according following link how can I call the >> power flow in a loop that adjusts the taps based on the voltages in the >> solution? I did it but it doesn't work. I will be appreciate if you help me. >> >> http://www.mail-archive.com/[email protected]/msg01610.html >> >> Best Regards >> >> D. Xu >> >> > >
