Harmonics in Power Systems of Ships with Electrical Propulsion Drives. Part 1.Effects on the Equipment

摘要

In this report, the effect of harmonics on the power system equipment and loads,with special attention given to the circumstances in ships, is discussed. Some guidelines are given for the computation of additional harmonic losses in power cables and transformers. The effect of harmonics on electrical machines is also discussed. Also, the harmonic resonances, which may arise when using reactive power compensation capacitors, are discussed. The immunity of different load devices to harmonic distortion is discussed. The equipment considered are resistive loads, discharge lamps, universal machines and electronic equipment. Finally a brief survey is given on the standards and recommendations for the maximum distortion levels allowed.