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
