The paper introduces a series of uninterruptible power supply panel with PBD DC operating power, a common component of power system dedicated UPS, to the power system communication, monitoring and protection equipment, emer-gency lighting and other devices can not provide electricity blackouts. Pointed out that the existing DC panel from the sub-station to take power on, you do not like the conventional uninterruptible power supply (UPS) as an additional large and ex-pensive battery, battery pack in order to avoid duplication of investment, reduce system maintenance and reduce system oper-ating costs.%介绍了PBD系列不间断电源屏与直流操作电源，共同组成电力系统的专用UPS，向电力系统通讯、监控保护设备、事故照明及其他不能停电的设备提供电力。并指出从变电站现有的直流屏上取电，就不必像常规不间断电源（UPS）那样增设庞大而昂贵的蓄电池组，从而避免蓄电池组的重复投资，减少系统的维护，降低系统运行成本。
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