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The Affections of System Stability on Replacing the Synchronous Condenser in Jeju Island  

Chang, Byung-Hoon (한전전력연구원)
Yoon, Jong-Su (한전전력연구원)
Han, Jeong-Yeol (한전전력연구원)
Shim, Jeong-Woon (한국전력공사)
Kang, Sang-Gyun (고려대학교)
Lee, Byong-Joon (고려대학교 전기공학과)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.56, no.10, 2007 , pp. 1715-1720 More about this Journal
Abstract
The CSC-based HVDC system links the Jeju system to the mainland system. Because CSC-based HVDC is installed in Jeju, the reactive power is needed to transfer active power through the HVDC. In order to supply reactive power, switched capacitors and synchronous condensers are installed in Jeju system. The deterioration of established synchronous condensers, however, causes a reactive power supply capability decline and high maintenance cost. It brings about the instability of Jeju system and the incremental of maintenance and repair costs. In the future the installation of wind generators and additional HVDC system would aggravate the stability of Jeju system. Therefore, it needs to consider a countermeasure against above problems. In this paper, Analysis of several contingencies of Jeju system was peformed, and some contingencies caused voltage-reactive power problem was known. CPF method was introduced in order to make countermeasures to replace the synchronous condensers and to solve the voltage-reactive power problem. The location and capacity of reactive power sources were also decided. It could guarantee medium and long term stability of Jeju system.
Keywords
Jeju system; CSC-based HVDC system; CPF; ESCR; Synchronous condenser;
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