Load-side DVR based on matrix converter for deep voltage sags compensation

Voltage sags are one of the most common and serious problems present in the distribution electrical systems, that affect the power quality in a significant way. Through the Dynamic Voltage Restorer (DVR), as a device for mitigating voltage variations, good results have been obtained. In this paper, it is analyzed a DVR topology based on the functionality of a Matrix Converter to generate the compensation voltage needed to compensate deep voltage sags. The DVR is placed on the load side of the system, taking the compensation energy from the load bus after the compensation has taken place, in order to be able to attenuate voltage sags. The model for the system is developed in the time dq0 reference frame as well as the controller. Finally, the analysis for the closed loop system stability is carried out and in order to verify the performance of the compensation system, and numerical simulations implemented in SimpowerSystems™ of Matlab ®/Simulink are presented.