Designing Cold-Ironing Power Systems | P2S

Kevin Peterson



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Cold ironing power system design requires unique components to supply shore power to ships for cold ironing operation. Currently, the development of new standards is in progress, and operating procedures are being written to maximize electrical safety, standardization of the process, and interchangeability from one location to another. This article describes the power system design, including a power system protection scheme, which should enhance the electrical safety by design. The power system grounding, equipment grounding, and touch potential that can impact personnel safety are described. A very basic outline of the operating procedures and training needed for the operators to maximize electrical safety during cold ironing operation are also included in this article. In addition, this article provides the current status of the draft International Electrotechnical Commission (IEC)/International Organization for Standardization(ISO)/IEEE Standards 80005-1 and 80005-2.

Cold Ironing System

Due to environmental considerations, ships are being required to turn off their auxiliary generators and instead receive power from shore systems. This method of connecting
ships to shore power-supply systems during berthing at the port is called cold ironing. (The term cold ironing originates from when ships equipped with onboard steam generators docked for repair. During repair, all of the pipes and boiler steel were cold, and thus the name cold ironing was used.)

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