SHIPBOARD ELECTRICAL PLANT Russian patent published in 1998 - IPC

FIELD: shipbuilding; shipboard electrical plants with shaft generators and frequency converters, mainly with diesel engines used as main engines. SUBSTANCE: plant includes main diesel engine connected with propeller by means of shaft line, shaft generator with excitation system kinematically connected with main diesel engine, frequency converter of shaft generator connected with bushbars of electric power station; controllable rectifier of frequency converter is electrically connected with shaft generator and driven inverter is connected with busbars of shipboard electric power station; controllable rectifier and driven inverter are connected by DC circuit. Plant includes also control circuits of controllable rectifiers and driven inverter and the following components connected in series: shaft line elastic vibrations sensor, phase shifter and amplifier whose output is connected to first input of current regulator. Besides that, plant contains auxiliary diesel engine kinematically connected with input shaft of auxiliary synchronous generator through disengagement clutch; synchronous generator is provided with excitation system and is electrically connected with busbars of shipboard electric power station. Plant is additionally provided with flywheel which is connected with output shaft of auxiliary synchronous generator. Current sensor is connected to DC circuit of frequency converter and is connected with second input of current regulator whose output is connected with control circuit of controllable rectifier or control circuit of driven inverter. EFFECT: enhanced efficiency. 1 dwg