D
Hi,
I work for a TSO, and we are experiencing very low (0.06Hz) oscillations of our grid frequency (50Hz) - the grid frequency signal very often looks like it is ringing in a fairly undamped way, with an oscillation amplitude of about 20-30mHz. Recently it grew quite large - 0.4Hz peak-peak swing, persisting for several minutes. I am wondering if anyone might be able to explain the mechanism behind this oscillation? It is not an inter-area oscillation - I suspect it is a governor mode of some sort. I also believe that our system frequency is quite poorly regulated - system stiffness was 300-400MW/Hz when the big oscillation occurred - lots of machines (e.g. wind turbines) are not regulating.
Thanks in advance for any light anyone can shed on this!
I work for a TSO, and we are experiencing very low (0.06Hz) oscillations of our grid frequency (50Hz) - the grid frequency signal very often looks like it is ringing in a fairly undamped way, with an oscillation amplitude of about 20-30mHz. Recently it grew quite large - 0.4Hz peak-peak swing, persisting for several minutes. I am wondering if anyone might be able to explain the mechanism behind this oscillation? It is not an inter-area oscillation - I suspect it is a governor mode of some sort. I also believe that our system frequency is quite poorly regulated - system stiffness was 300-400MW/Hz when the big oscillation occurred - lots of machines (e.g. wind turbines) are not regulating.
Thanks in advance for any light anyone can shed on this!