AN AC TEMPORARY LOAD DEVICE AND DISTRIBUTION SYSTEM FOR OPERATING AN ELECTRIC MACHINE OR ELECTRICAL LOAD POWERED BY A LONG CABLE

摘要

The invention discloses temporary load device (2) comprised in a subsea distribution bus (14) connecting a power load system (3) to electrical power supplied by an AC power supply (1) by means of at least one long cable (7). The subsea distribution bus (14) comprises a local control unit (4), and a temporary load device (2), which is arranged, upon receipt of a first signal from the local control unit, to close and reduce the voltage to the power load (3), and, on receipt of a second signal is arranged to open and disconnect said temporary load device (2) from the subsea distribution bus (14) having avoided or reduced an overvoltage, or a load drop, at the power load system (3). The temporary load device (2) may be used to mitigate a measured or estimated over-voltage or other voltage fault condition such as voltage oscillation caused by connecting a subsea load to the power supply. In other aspects of the invention are disclosed: a subsea distribution bus including the temporary load device; a method; and a computer program for carrying out the method.