关于变电站操作电源与通信电源一体化的商榷

Discussion on the Electric Power Source Integration of Operation and Communication in Substations

对于110kV及以上变电站通信设备的-48V直流电源应该采用“AC-DC独立通信电源”，还是采用“操作电源＋DC-DC一体化电源”是有争议的。针对这个问题进行了技术分析和比较，结论为：不推荐采用“操作电源＋DC-DC的一体化电源”给变电站系统通信各设备供电，因为其职能层次、安全可靠性和电源质量均比不上“AC-DC独立通信电源”。

There is a controversy for the -48 V DC power supply to communication devices in substations of 110 kV or above： whether ＂AC-DC independent power supply＂ or ＂Operating power supply ＋ DC-DC integration power supply＂ should be adopted. Aiming at the issue, this article analyzes the two kinds of power supply and makes comparison between them, resulting in a conclusion that ＂Operating power supply ＋ DC-DC integration power supply＂ is not recommended for the power supply to the system communication devices in the substations as its flmctional level, reliability and power source quality are worse than that of ＂AC-DC independent power supply＂.