METHODS OF OPERATING DUAL FED SYSTEMS

摘要

A method of operating a dual fed system is described where power is supplied to a electrical load from first and second ac busbars at a ratio that achieves a desired level of exhaust emissions such as nitrogen oxides (NOx), carbon dioxide (CO2) and other pollutants produced by the prime movers associated with generators. Preferably, the method may be used to operate a dual fed marine propulsion system wherein the electrical load is a thruster. Operating a dual fed marine propulsion system using the method of the present invention makes it possible to optimise thrust allocation between thrusters in a way that is similar to that used in conventional dynamic positioning (DP) systems and then share or allocate the required power between generators to minimise exhaust emissions.

主权项

1. A method of operating a dual fed system comprising:
a first busbar; a second busbar; at least one generator connected to the first busbar and having an associated prime mover that produces exhaust emissions; at least one generator connected to the second busbar and having an associated prime mover that produces exhaust emissions; and an electrical load connected to the first busbar by means of a first power converter and to the second busbar by means of a second power converter; the method comprising the steps of selecting a desired level of exhaust emissions from the prime movers and supplying power to the electrical load from the first and second busbars at a ratio that achieves the desired level of exhaust emissions.