Open AccessPARALLEL OPERATION OF DIESEL GENERATOR SETS OF CONSTANT AND VARIABLE SPEED
Author(s) -
Dmitry Sergeevich Kobyakov,
Evgeniy Mordcovich Burda,
Andrey Daryenkov,
Ilya Aleksandrovich Tarpanov,
Олег Станиславович Хватов
Publication year - 2018
Publication title -
vestnik astrahanskogo gosudarstvennogo tehničeskogo universiteta. seriâ: morskaâ tehnika i tehnologiâ
Language(s) - English
Resource type - Journals
eISSN - 2225-0352
pISSN - 2073-1574
DOI - 10.24143/2073-1574-2018-1-93-99
Subject(s) - generator (circuit theory) , diesel generator , propulsion , rotational speed , electric generator , automotive engineering , transient (computer programming) , diesel fuel , control theory (sociology) , power (physics) , diesel engine , electricity generation , electrical engineering , computer science , engineering , mechanical engineering , physics , control (management) , artificial intelligence , quantum mechanics , aerospace engineering , operating system
The paper focuses on the operation of the ship's single power station with a common link of direct current and a diesel generator of variable speed are considered. It is shown that the operation of a diesel generator set at a constant (nominal) rotational speed, but variable load is characterized by a nonoptimal (overrated) specific fuel consumption. At the same time, forced regulation of the internal combustion engine rotation speed in accordance with the electric load of the generator make it possible to provide energy-efficient mode of generating electricity. One way to improve the energy performance of the ship single power station is to convert one of the parallel operating diesel generators into a variable speed mode. In this case, the load between the parallel operating diesel generators is distributed in proportion to their rotation frequencies, regardless of the individual loading of the propulsion motors. To stabilize voltage of the diesel generators operating in the variable speed mode, a power semiconductor converter is used. Functional scheme and mathematical simulation model of the ship single power station, graphs of transient processes with load changes in the channel of electric propulsion system of the vessel are presented.