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Dynamic Voltage Restorer (Dvr) For Voltage Sag Mitigation, Tarek Ibrahim Elshennawy, Amr Yehia Abou-Ghazala A. Prof., Mahmoud El-Gammal Prof.
Dynamic Voltage Restorer (Dvr) For Voltage Sag Mitigation, Tarek Ibrahim Elshennawy, Amr Yehia Abou-Ghazala A. Prof., Mahmoud El-Gammal Prof.
Tarek Ibrahim ElShennawy
The Dynamic Voltage Restorer (DVR) is fast, flexible and efficient solution to voltage sag problem. The DVR is a power electronic based device that provides three-phase controllable voltage source, whose voltage vector (magnitude and angle) adds to the source voltage during sag event, to restore the load voltage to pre-sag conditions. The DVR is designed for protecting the whole plant with loads in the range of some MVA. The DVR can restore the load voltage within few milliseconds. Several configurations and control methods are proposed for the DVR. In this paper, an overview of the DVR, its functions, configurations, components, …