\begin{figure}[!htbp] \centering \includegraphics[width=10cm]{figurer/Theory/droop_Wiley_power.png} \caption{Example of a droop curve for one generator only (Wiley)} \label{fig:Theory_droop} \end{figure}
Note that I replace the H option by (all) other placement options for flexible placement as near as possible but for good page breaks. The image may float a bit to optimize the page break. But that's what references are for: to point to the image that's in a slightly moved location for optimal text flow.
For italic captions:
\usepackage{caption} \captionsetup[figure]{textfont={it}}
You can extend it, such as
\captionsetup[figure]{labelfont={bf,small},textfont={it,small}}
Stefan