In the paper, an electrical power system of base station is introduced in detail, including AC power supply system, DC power supply system and earthing system.
文中介绍了通信基站的电源系统，包括交流供电系统、直流供电系统和接地系统，论述了等电位在基站建设中的重要性。
As backup power supply of the DC system, the residual capacity of battery effected safe operation of DC system directly when ac power failure occurs.
蓄电池作为直流系统交流停电时的后备电源，其剩余容量直接影响了直流系统的安全运行。
With the rapid development of subway, it is necessary to consummate the protection for DC traction power supply system.
随着城市地铁的大力发展，研制更加完善的直流保护正是应时之需。
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