Review of voltage compensation methods in dynamic voltage restorer (DVR)

Voltage sag is a common and undesirable power quality phenomenon in the distribution systems which puts sensitive loads under the risk. An effective solution to mitigate this phenomenon is to use dynamic voltage restorers and consequently, protect sensitive loads. Four basics compensation methods were proposed in the research community to eliminate the voltage sags and minimize the voltage disturbances at load side. This paper provides a review of those voltage compensation strategies with detailed discussions and comparisons to highlight their advantages and disadvantages.