Abstract

This paper presents a novel electrical propulsion method, and a decentralized control system implementation, inclusive of hardware and software (algorithm), for LNG-fueled ice-breakers. The customer value of the method is the avoidance of switch-over of the prime movers on-board from LNG to Diesel on propeller stall-out due to heavy ice-breaking conditions. The paper describes an implementation running on the ice-breaking LNG carriers Christophe de Margerie and Eduard Toll. In addition to previous published work, this paper presents analyses of the installation of energy storage for the absorption and peak-shaving of generation-side over-production of electrical power in the event of intermittent propeller stall-outs when ice-milling.

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