Scientific and Technical Journal

ELECTROTECHNIC AND COMPUTER SYSTEMS

ISSN Print 2221-3937
ISSN Online 2221-3805
METHODS TO IMPROVE THE QUALITY OF ELECTRICAL SUPPLY OF SHIP SYSTEM WITH NONLINEAR LOAD
Abstract:
The article presents the modern methods of improving electricity of ship’s power supply system with nonlinear load. Four mathematical models of "autonomous source - nonlinear load", "autonomous source - passive filter - nonlinear load", "autonomous source - active filter - nonlinear load", "autonomous source - hybrid filter - nonlinear load" are constructed in the package MATLAB Simulink and conducted harmonic analysis of current and voltageship’s power network. The passive filter C-type has been performed on the 5th, 7th, 9th, 11th harmonics for ship’s high-voltage network 3300 V, frequency 60 Hz. As a non-linear load is using an induction motor with 1500 kW capacity and frequency converter that operates on bow thruster.Modeling and the qualitative analysis were carried out and obtained results confirmed the general theoretical provisions on the presence of higher harmonics of voltage and current in the ship’s power network with nonlinear load, and also demonstrates the effectiveness of using filter-compensating devices of various principles and structures for their suppression.
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References
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