V
Vale
Guest
This is a good example. The station was only moved once, and inside the system, and was at risk of breaking apart during the event. That sets it apart from any starship and defines the Nor-class as space station.
We actually see it moved twice – in "Q-Less" it's drawn towards the wormhole by the gravitational anomaly of the week, and while it's not under its own power we definitely see it moving during that episode. And of course it must have moved itself back to its usual position in time for the next episode, although it's possible it did that with assistance from starships.