Reducing Voltage Sag and Swell in Medium Voltage Distribution Networks by Using a Developed Dynamic Control Method

Abstract

This paper presents a new method for controlling the dynamic voltage restorer to improve the quality of electric power in the face of the most common disturbances that occur in the power distribution system such as voltage sag and voltage swell, which usually occur due to faults or non-linear loads that are widespread in our time and here begins the task of the DVR from detecting faults To inject the required effort according to a fast dynamic response. In this research, the new control method relied on controlling the front feed and the back feed, which in turn enhances the performance of the DVR in carrying out its task. To ensure the success of the proposed control method, it was tested on a 22 kV medium distribution system containing a sensitive load. The modeling results showed that the proposed control method is much better in terms of voltage quality and on the other hand it enhances the ability of the DVR to perform its task.