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Electrical power distribution system, method for powering a corresponding task, propulsion system and method for a ship

  • US 10,450,044 B2
  • Filed: 03/31/2017
  • Issued: 10/22/2019
  • Est. Priority Date: 03/31/2016
  • Status: Active Grant
First Claim
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1. An electrical power distribution system, comprising:

  • an assembly of electrical power generators, each driven by an auxiliary heat engine and supplying a distribution network;

    wherein, the distribution network provides an auxiliary electrical motor being operably connected to a motor shaft driven by a principal heat engine and having a propeller;

    a heat exchanger configured for recovering heat energy generated during the operation of the principal heat engine and the auxiliary heat engines and for vaporizing a working fluid;

    a steam turbine (i) configured to receive steam from the heat exchanger, (ii) driven by the working fluid and (iii) associated with a generator connected to the distribution network for converting the recovered heat energy into electrical energy;

    a controller configured for regulating the flow rate of the vaporized working fluid to a maximum value; and

    at least one frequency converter arranged between the distribution network and an auxiliary electrical motor, the at least one frequency converter being in operable connection with the controller;

    wherein the at least one frequency converter is configured to switch between a fixed frequency of the distribution network and a variable frequency; and

    wherein, when pressure at an input of the steam turbine exceeds a predetermined minimum pressure value, the controller facilitates the switch of the at least one frequency converter from the fixed frequency of the distribution network to the variable frequency for supplying energy to the auxiliary electrical motor.

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