| Abstract |
This paper describes the effects of linking two offshore installations, with two 22 !cm sub-sea cables. It is
shown using site measured data, that the non-linear, six-pulse drilling drives can excite the power system's natural
frequency. Due to the differing type of generation available, the system natural frequency changes dramatically as different combinations of generation are brought on-line. It is also shown that when there are two cables feeding different systems, there is the potential for an inter-cable resonance. Site rneastuernents are compared with results from both time and frequency domain analysis of the system obtained using the SABER simulator. Good eorrelation between site measured
and simulated data is demonstrated. The paper eoncludes by explaining how the results of this theoretical analysis have been used by the offshore operator to derive system operating policy. |
