Unfair voting is not permitted anywhere on the network. By "unfair voting", we mean anything other than voting on content for its merits. That would include serial up- or downvoting, as you're talking about here. When we see evidence of patterns like this, we'll reverse the votes and reset any associated impacts such as reputation.
That said, because abilities here are not tied to reputation, we've had very few problems with serial voting, because there's very little benefit to it.
In this case, our automated systems haven't identified any concerning patterns, and I've just manually reviewed the voting data and I don't see anything concerning either. Enjoy your extra rep!