I was reading about synchronizing of two AC generator. As an aid to grasp the concept, I tried to analyze what will happen if two generators of same frequency and voltage but slightly different phases were paralled. I am slightly surprised to find out that active power flows in there even if there appears no resistive Loads. And that the direction of active power flow is governed by which generator lag in phase. Also, I asked the question, why should the Generator 1 Provide power (real) to generator 2 simply because its phase is leading? Is this a natural duty for leading to power the Lagging? It seemed quite asymmetric to me. Of course maths have the answer. So, after trailing back calculation, I convinced myself that the asymmetry comes from the fact that in between the generators lies an inductive reactance as opposed to capacitive reactance. I am looking for practical cases of what the active power and reactive power does in there? Does it help to make the phase equal? How? Thanks.