Modular power supply for distribution automation system

A modular power supply system for distribution automation system comprising:

• a plurality of power supply modules having means to connect to one or more input power sources and to connect an output of each power supply module in parallel, wherein each power supply modules is independent and has regulating means, a rectification module for generating output DC voltage, a transformer having its primary side connected with the regulating means and with the input power source, and having its secondary side connected to the rectification module, voltage feedback means for providing a voltage feedback signal to the regulating means to regulate the respective output DC voltage, and a load share control module for controlling load sharing;
• a common output voltage bus connecting a respective output voltage from the plurality of power supply modules;
• and
• a common current share bus connecting a load share signal for a respective load share control module from the plurality of power supply modules,
• wherein at least one power supply module has a filter amplifier for conditioning a respective voltage feedback signal from the at least one power supply module, said filter amplifier being connected in the secondary side of the transformer for reducing noise in the modular power supply system.