【摘要】 简述了目前船舶岸电箱的不足之处,并提出了一种新型的岸电相序自动整定及缺相保护电路,从三相不对称电路的特性开始分析,对信号的采集、处理及控制进行了讨论,并给出了具体控制电路图,同时,对电路的工作原理作了较详尽的介绍。更多还原

【Abstract】 It is not permissible to optionally change the phase-sequence of a marine three-phase a.c. system, once the phase-sequence is fixed. Otherwise serious accidents will occur with subsequent damage. In order to increase the ships economy, it is usual to connect shore power during ships berthing or repairing in a shipyard. When connecting shore power, the phase-sequence of shore power must be the same as that of ship power. This article points out disadvantages of ships shore power connection box present, and designs a new kind of electric circuit used for automatically modifying shore power phase-sequence and Open-phase protection on analyzing the characteristics of un-balanced three-phase circuit. The signal collection、treatment 、control process in this circuit is discussed, and the working principle of the circuit explained in detail.更多还原