船舶电力系统高次谐波危害与抑制研究

在陆上高次谐波对电网的危害,近年来已逐渐被重视。而船舶电网由于非线性负荷和冲击负荷的增加,高次谐波比陆上更严重,但没有得到重视。船舶电力系统中高次谐波的产生原因主要是变流装置的广泛使用。船舶高次谐波的危害是多方面的,最主要的危害是影响船舶电气设备的正常工作和缩短船舶电气设备的使用寿命,比较严重的危害有电网产生谐振过电压击穿绝缘,给保护装置和自动化装置提供误信号使其产生误动作。高次谐波的抑制方法主要有装设滤波器和谐波抵消法。许多新型用电设备对船舶电能质量提出了更高的要求,因此重视船舶电网高次谐波问题很有必要。

Harm and Restrain of High Order Harmonics of Ships Electric Power System

More attentions has been recently paid for the harm of high order harmonics for electric power circuit on land,but the same attentions has not been paid in ships where there is more serious high order harmonics due to the increase in the nonlinear and impact loading in ship electric power circuit.The cause for creating high order harmonics in ship electric system is mainly the extensive usage of electric current converting devices.The harm is the influence on normal operation and the reduction of the life of marine electrical equipment.More serious harm is to make electric power circuit creating resonance overload voltage that will breakdown insulation and to make protective and automatic devices providing wrong signals doing fault operations.The restrain of the high order harmonics can be made by installing filters or by method of harmonics offset.It is necessary to stress the problem about high order harmonics in marine electric network,because many new electrical equipment has more requirements for ship electric power quality.