Experience with an inverter-based dynamic voltage restorer

Installation of the worldʹs first Dynamic Voltage Restorer (DVR) on a major US. utility system to protect a critical customer plant load from power system voltage disturbances ushers in a new era of power quality problem solution on the utility si& of the revenue billing meter. The prototype DVR built by Westinghouse for EPRI was installed in August, 1996 on the Duke Power Company (North Carolina) 12.47-kV system at an automated yarn manufacturing and weaving factory where it provides protection from disturbances coming from the utility distribution system that serves the plant. This paper describes the prototype DVR installation and presents early results from the demonstration project.