Modular power supply for distribution automation system

摘要

An exemplary power supply module for distribution automation includes a manner of connecting an input power source to a power supply module and connecting an output of the power supply module to external devices, a manner of regulating, a rectification module generating output DC voltage, a transformer having a primary side connected with the regulating component and one or more power input power sources, and a secondary side connected to the rectification module, a manner of voltage feedback means for providing a voltage feedback signal to the regulating component to regulate the output DC voltage, and a load share control module having a load share signal for controlling load sharing for the power supply module. The power supply module includes a filter amplifier for conditioning the voltage feedback signal, where the filter amplifier is connected in the secondary side of the transformer for reducing noise in the power supply module.

主权项

1. A power supply module for a distribution automation system, the power supply module being connectable in parallel and comprising:
a means to connect an input power source to the power supply module and to connect output of the power supply module to external devices; a regulating means comprising a switching element which is controlled by a voltage error amplifier to regulate an output DC voltage; a rectification module generating the output DC voltage; a transformer having a primary side connected with the regulating means and one or more power input power sources, and a secondary side connected to the rectification module, wherein the switching element is adapted to control current on the primary side of the transformer; a voltage feedback means for providing a voltage feedback signal to the regulating means to regulate the output DC voltage; a load share control module having a load share signal for controlling load sharing for the power supply module; and a filter amplifier for conditioning the voltage feedback signal in a voltage control loop, the filter amplifier being connected on the secondary side of the transformer for reducing noise in the power supply module; wherein the filter amplifier on the secondary side of the transformer and the voltage error amplifier of the regulating means on the primary side of the transformer each have a different frequency response to achieve stability over a wide input voltage range and different input power sources for parallel connected power supply.