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电压是港口供电电能质量的重要指标之一，电压的质量决定于电力系统二次变电站的电压质量和港口距离该变电站的远近。港口的电压应根据其范围的大小，负荷的大小以及用电设备的电压等级等因素进行方案比较，选择技术和经济都比较好的设计方案。
Voltage is one of the most important indicators of the power quality of the port. The quality of the voltage depends on the voltage quality of the secondary substation of the power system and the distance between the port and the substation. Port voltage should be based on the size of its scope, the size of the load and the voltage level of electrical equipment and other factors compared to the program, select the technology and economy are better design.