E ISSN: 2583-049X

International Journal of Advanced Multidisciplinary Research and Studies

Volume 3, Issue 2, 2023

PWM Controller for Dynamic Voltage Restorer in the Voltage Grid

Author(s): Vu Van Thao


Dynamic voltage restorers (DVRs) are used to protect sensitive loads from the effects of voltage sags on the distribution feeder. In all cases it is necessary for the DVR control system to not only detect the start and end of a voltage sag but also to determine the sag depth and any associated phase shift. The DVR, which is placed in series with a sensitive load, must be able to respond quickly to a voltage sag if end users of sensitive equipment are to experience no voltage sags. With the loads, the stability of voltage for appearing voltage sag is placed on top of avoiding damaging the device. The voltage sag phenomenon is a change in voltage in a short time but can cause the machine to stop at some important loads, affecting the normal operation of the entire electric power system. The voltage sag can be overcome by the application of Dynamic Voltage Restorer (DVR) built on the basis of a power electronic converter with advanced features such as fast impact and very high accuracy.

Keywords: Dynamic Voltage Restorer, PWM, FACTS

Pages: 578-581

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