Silvio Miceli <[email protected]> writes: > Dear Shiyang, > > I also want to do it by Monte Carlo, but not loads. I want to have a > distribution of voltage as input. When I load loadcase it gives error. My mean > is this: > I want load variable voltage values in bus matrix. Is it possible? >
Silvio, I believe the best way to achieve this is to generate the normal distibution in a script which calls the OPF solver and collect the results to display as a distribution. So, in the Monte Carlo, you use stochastic input on a Black Box model and collect stochastic output. This normally takes some time, but what do you look for really? > Best Wishes > > Silvio Miceli > > On Fri, Mar 23, 2012 at 23:19, 李诗旸 <[email protected]> wrote: > > HI Silvio Miceli, > > I think Mr. Zimmerman’s suggestion is the way like Monte Carlo Method. > Normally, you may have the distributions of some parameters (inputs) such > as loads and active generations, then you could use that way to get the > distributions of the optimized voltages (output) numerically. > > > > Sincerely > > Shiyang Li > > > > 发件人: [email protected] [mailto: > [email protected]] 代表 Silvio Miceli > 发送时间: 2012年3月24日 4:31 > 收件人: MATPOWER discussion forum; Ray Zimmerman > 主题: Re: probabilistic voltage > > > > I want to a have a distribution of voltage at buses that it is an > optimization variable in MATPOWER? These distributions are the inputs for > the OPF. > > Best Wishes > > > > Silvio Miceli > > On Fri, Mar 23, 2012 at 21:25, Ray Zimmerman <[email protected]> wrote: > > I'm afraid I don't know what *you* mean. The voltages are *outputs* of > MATPOWER's OPF. So what are the input parameters that you would like to be > stochastic? Voltage limits? > > > > -- > > Ray Zimmerman > > Senior Research Associate > > 419A Warren Hall, Cornell University, Ithaca, NY 14853 > > phone: (607) 255-9645 > > > > > > > > On Mar 23, 2012, at 2:40 PM, Silvio Miceli wrote: > > My problem is this I cannot do loadcase. How can I do many, many > deterministic optimization? If I introduce voltage as x and do it with a > FOR? > > > > Could you please explain better? I didn't understand. I am sorry. > > Best Wishes > > > > Silvio Miceli > > On Fri, Mar 23, 2012 at 19:22, Ray Zimmerman <[email protected]> wrote: > > MATPOWER does not implement any stochastic optimization. All of it's > variables and parameters are assumed to be deterministic. However, one > approach to handling probabilistic parameters is to simply do many, many > deterministic optimizations, where each one involves, for each > probabilistic parameter, drawing a value from the corresponding > distribution. Such an approach could use MATPOWER's OPF as a subroutine to > solve the deterministic sub-problem. > > > > -- > > Ray Zimmerman > > Senior Research Associate > > 419A Warren Hall, Cornell University, Ithaca, NY 14853 > > phone: (607) 255-9645 > > > > > > > > On Mar 23, 2012, at 12:42 PM, Silvio Miceli wrote: > > Dear Dr. Zimmerman, > > > > I want to have probabilistic voltage or reactive power in an OPF. In other > words, I want to do OPF with probabilistic variables,e.g. voltage should > be > a normal distribution of voltage. How can insert this kind of variables to > case file of MATPOWER? Is there this possibility in MATPOWER? > > > > Best Wishes > > > > Silvio Miceli > > > > > > > > > > > > > -- Johnny
