Abstract
Korea Electric Power Corporation (KEPCO) has installed an 80 MVA Unified Power Flow Controller (UPFC) at its 154kV Kang-Jin Substation in South Korea. The device, manufactured by Siemens & Hyusung, has been operational since Oct. 2002. The Korea Electric Power Research Institute (KEPRI)), a division of KEPCO was tasked to study the operation strategies that could be employed for the UPFC and surrounding reactive support devices to address problems of low voltages and overloads in the Mokpo & Gwangju areas forsevere contingencies. A special concern involved potential delay in the installation of a new 345 kV transmission line from 2005 to beyond 2010. The studies were to determine if these problems could be eliminated by UPFC application. The studies included determining the UPFC operating point under the various conditions, investigations of the coordination between the UPFC and a HVDC line terminating in this area, and to design the supplementary damping controller for the UFPC. This paper summarizes the results of those studies, demonstrating the dynamic characteristics of the operation of this UPFC operation in the Korean power system.
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