Shift a Single Equation Vertically

I’m in the final stages of formatting my thesis and I have one final change to make which I do not know how to do. I have an equation at the top of a page, but it’s spaced as though there is text above it. To meet my university’s requirements it needs to be at the top margin. Is there a way I can suppress the generation of white space above an equation for a single instance? I’ve already tried this to no effect, does anyone have any other suggestion:

begingroup
setlength{abovedisplayskip}{-12pt}
begin{equation}
equation here
end{equation}
endgroup