There is no problem with using direct specification to supply a vector rhat,
with different shift for each nodal voltage. Simply define N so that r is the
vector of bus voltages, then rhat can be the corresponding shifts.
Ray
> On Jul 24, 2015, at 11:06 AM, 陈春宇 <[email protected]> wrote:
>
> Hi everyone,
>
> I referred to Section 7.1 Direct Specification and 7.2 Callback Functions and
> have a problem regarding user-defined cost function. In my case, I doesn't
> need new variables, simply a set of nodal voltage. And I want to regulate
> them as close as to a set of values(each nodal volatge corresponds to
> different value). In Direct Specification method, rhat is used as the shift
> for all the variables. But I need different shifts. Is there some way I can
> use or should I use Callback Functions? Thanks very much!
>
> Best Regards
