Control Strategies In Series Voltage Sag Compensator To Mitigate Inrush Current In Transformer

22 Jun
Posted on Author

Authors: Prof. R. J. Nikam, Dr. D.P. Kadam, Mr. Sanjay B. Amrutkar

Abstract: The control strategies used in Series Voltage Sag Compensators (SVSCs) work to reduce the inrush current in transformers by actively managing the flux linkage in the coupling transformer. These methods commonly employ flux-oriented closed-loop control, point-on-wave switching, or fuzzy logic–based decision mechanisms. An inverter-fed series compensator injects a carefully controlled compensating voltage, ensuring smooth flux evolution during sag recovery. As a result, magnetic saturation at the instant of sag clearance is avoided, load voltage is restored seamlessly, and excessive inrush currents that could stress power electronic devices or trigger protection systems are effectively eliminated. This makes SVSCs a reliable solution for dynamic voltage compensation in modern power distribution networks.

DOI: http://doi.org/10.5281/zenodo.20787591