Abstract

A dynamic voltage restorer is a power quality (custom power) device used to correct the voltage disturbances by injecting voltage as well as power into the system. The compensation capability of a dynamic voltage restorer (DVR) depends primarily on the maximum voltage injection ability and the amount of stored energy available within the restorer. In this paper a new phase advance compensation (PAC) strategy for the DVR is proposed in order to enhance the voltage restoration property of the device. Also a method of determining the exact amount of voltage injection required to systematically correct a specific voltage drop with minimum active power injection is proposed. Using the proposed method it can be shown that a particular disturbance can be corrected with less amount of storage energy compared to that of existing in-phase boosting method. Analytical expressions for both the magnitude and angle of the injected voltage are also derived. A closed-loop controller that consists of an inner current loop and an outer voltage loop is also incorporated into the DVR system.

Submitted: May 15, 2005 · Accepted: August 23, 2005 · Published: November 17, 2005

Recommended Citation

Taghikhani, Mohammad Ali and Kazemi, Ahad (2005) "A New Phase Advanced Multiloop Control System For Dynamic Voltage Restorer," International Journal of Emerging Electric Power Systems: Vol. 3 : Iss. 2, Article 1072.
Available at: http://www.bepress.com/ijeeps/vol3/iss2/art1072