船舶电力系统中交流配电网零线故障的诊断

Zero Line Fault Diagnosis in AC Power Distribution of Ship Power System

船舶电力系统中采用的三相四线制交流配电网中零线故障时有发生,为了保证船舶电力系统的供电连续性及最大可能地缩短船舶停电时间,本文结合一起零线故障的实际情况,运用电路理论分析了零线故障产生的机理及其危害性,指出三相四线制交流配电网零线接地的重要性,并提出了防止此类事故的基本措施和具体方法。

Zero line fault occurs occasionally in the three-phase 4-wire AC distribution network of ship power system. In order to ensure the continuity of power supply as much as possible and reduce the time span of ship power failure to the least degree, this article, based on a real case of zero line fault and by employing the principles of circuit, analyzes the cause mechanism and damages brought by zero line fault. Also, the importance of ground connection in the distribution network of three-phase 4-wire system has been stressed. Moreover, basic measures and procedures in preventing the zero line fault has been proposed as well.