ANALYSIS OF ELECTROMAGNETIC COMPATIBILITY OF HIGH-POWER SOFT STARTER WITH VESSEL’S POWER NETWORK IN DYNAMIC MODES
Abstract
The harmonic distortion caused by a soft starter-fed high voltage induction motor drive is analyzed. The
high power induction motor is used to drive a bow thruster of a ship. A comprehensive mathematical model of a real
bow thruster electric drive is developed. The model is used to simulate and study the transient and steady-state operation modes of the drive. Simulation results show that in transients, the values of the total harmonic distortion of the line
current (THDi) and voltage (THDu) exceed their maximum permissible limits defined by IEEE standards; the major
impact on the ship’s power system has the 5th and 11 th harmonics, thus enhancing the power quality of such electric
drive requires focusing on the mitigation of the mentioned harmonic content.