Power Generation, Transmission and Distribution
Technical Lecture Session
Controller and Filter Design for Utility Interface Converters
Step Voltage Regulator, Arcless Tap Changer, Back-to-back Converter, Current Suppression
In this paper, a new topology of arcless voltage regulator is proposed. Simulation is conducted to verify the control algorithms and concepts. A hardware prototype is also built. Based on the hardware testing results, the proposed arcless voltage regulator can eliminate the arc by suppressing one target branch current before the mechanical tap changing. Therefore, it reduces the metal contact erosion rate, hence extends the lifetime and maintenance period of the step voltage regulator. This method introduces a back-to-back converter to the system. More advanced functionalities, such as Var control and accurate voltage regulation, can be further developed.