When you have a sudden change in load, I understand that you can expect to see sudden, voltage/current spikes. I also understand that you can expect to see a generator speed up or slow down for a short duration as this load change occurs. So I understand that as the generator changes rpm, the frequency output of the generator must change, even if it is for a short moment. During this short moment while frequency, and VI both increase is where I'm a bit curious. I've been trying to find some kind of formula that explains how frequency and power or current or voltage are related, I'm a second year electrical apprentice, so try and use terms I would understand! Thanks :)