Pole slip is a phenomenon caused either by low excitation, a faulty regulator or abrupt changes of load within the mains. It can cause severe mechanical stress within the generator, putting winding at risk, causing shaft damage or adversely affecting the control operating system.
Very high currents can cause thermal instability and ultimately lead to complete destruction of the generator and immense instability on the grid. In order to illustrate this technical problem, ComAp have released an informative YouTube video.
The innovative solution from ComAp, available in the InteliPro range from ComAp, strengthens the overall protection of synchronous generators by preventing unnecessary damage to embedded power systems. Conventional protection, such as overcurrent, vector shift and ROCOF is not sufficient as it doesn’t respond quickly enough and is unreliable where large load jumps develop and cause oscillations.
The new ComAp technology predicts imminent pole slip in time to minimise the destructive effects of lost synchronism without the need for complicated settings.