Author: N.V. Shirokov
Abstract
The article considers a number of approaches aimed at solving the problem of trouble-free operation of ship's electric power systems (SEPS). It has been shown that in a number of situations related to failures of power sources, modern control tools are not effective. In this regard, it has been proposed to use the method of preventive control, which provides structural adaptation of the ship's electric power system to the resulting malfunction. The algorithm of SEPS self-organization has been proposed, which is carried out on the basis of forecasting the development of the current situation in the ship's power supply, its technical condition, as well as the technical condition of the generator sets. The article considers a number of situations when modern means of protection of SEPP are not effective, although they fully comply with the Rules of Classification and Construction of Sea-Going Ships. In this regard, studying the need to adjust the requirements of the Russian Maritime Register of Shipping regarding the organization of such management of the electric power system has been suggested, in which the failure to a partially operational state will occur without interruption in the power supply of the responsible devices of the vessel. The article proposes a functional diagram of a simple device that provides preventive unloading of the ship's electric power plant (SEPP), carried out before the shutdown of an inoperable generator set. This allows the system to avoid network overload and system operation in transient modes, for which modern primary engines are not designed. An algorithm for controlling the SEPP in non-standard mode has been developed and presented, preventing the appearance of reverse power and ensuring the correct functioning of the system in the event of a failure of the generator set. A preventive start of an emergency diesel generator not at the time of the disappearance of the voltage in the network, but in a number of emergency situations has been proposed, the direct consequence of which is the termination of the ship's power supply, for example, in the event of a fire in the auxiliary diesel generators. In this case, the emergency power source is started before the main power supply is switched off, and in the event of a voltage loss, it is instantly connected to the buses and provides uninterrupted power supply to the essential devices
Keywords: accident-free operation, ship's electric power system, preventive management, protection against reverse power, preventive unloading of the network, preventive start-up of an emergency diesel generator.
References
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About author:
N.V. Shirokov - PhD, Admiral Makarov State University of Maritime and Inland Shipping, St. Petersburg, e-mail: shirokovn@inbox.ru
Issue: 62/63 (2021)
For citation: N.V. Shirokov. Preventive protection of the ship's electric power system with parallel generator sets. Research Bulletin by Russian Maritime Register of Shipping. 2021, No. 62/63, pp. 121-130.
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