提高港区380V电压等级的可行性研究

The Feasibility Study of Raise 380 V Voltage Level in Port Area

目前 ,我国以门机为码头前沿主要装卸机械的码头 ,配电电压一般为 380V ,而门机上的电动机安装容量又较大 ,由于配电电压低 ,电流大 ,有时出现烧毁电动机的现象 ;在码头前沿需要设置相当数量的 10 / 0 .4kV变电所 ,占用了许多要地 ;变压器和开关设备的利用率低 ,造成浪费。将港区 380V电压提高到 6 6 0V ,技术上可行 ,经济上合理 。

At present, the wharves with protal crane as main frontage handling machineries, their electric power distribution voltage is 380 V in general, which is lower. But the installed power of motors in protal crane is bigger.So sometime the motor can be burned because of the bigger current.If corresponding number of 10/0.4 kV distribution station are installed, so the much working area are occupied, the usage of transformer and the switch equipment are lower, which lead to wasting. To raise the voltage from 380 V to 660 V in port area, that is feasible in technique and reasonable in economy, therefore it has important sense.