| Abstract |
The paper presents the application of power electronic switches and compensators applied at
distribution systems, usually called Custom Power devices. From the point of view of power quality,
the most problematic disturbance in distribution systems is the occurrence of faults that can lead to
voltage interruptions and sags (dips). In order to interrupt or limit fault currents, alternatives based on
power electronics are investigated in a typical distribution network. The transfer between two feeders
of the voltage supplied to a load, with the help of thyristors, is also presented. A more sophisticated
solution for avoiding voltage sags to critical processes is the series connection of a forcedcommutated
voltage-source converter, in a configuration called Dynamic Voltage Restorer (DVR).
The proposed mitigation techniques are demonstrated through results from test cases performed at an
analog real-time model scaled to low power. |
