Abstract
This paper presents node voltage control in a loop distribution system using the series and shunt converters of a UPFC (Unified Power Flow Controller). The purpose of voltage control is to control and regulate all node voltages within the appropriate range. The currents in the loop distribution system can be divided into loop and mesh currents, which can be controlled by the series and shunt converters, respectively. The node voltage control methods by the series and shunt converters are derived. The authors propose cooperative control using the series and shunt converters to minimize the converter capacity. The effectiveness of the proposed cooperative control is verified by experiments in steady and transient states using a laboratory prototype of the loop distribution system.
Published Version
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