Effect of Series and Shunt Compensation on Subsynchronous Resonance

• Main Authors: Wang, Sheng-Kuan, 王勝寬
• Other Authors: Yuan-Yih Hsu
• Format: Others
• Language: zh-TW
• Published: 1998
• Online Access: http://ndltd.ncl.edu.tw/handle/82695503848771362667

碩士 === 國立臺灣大學 === 電機工程學系研究所 === 86 === For the power system of Taiwan Power Company (TPC) during the peak loadper iod in 2000 AD, two problems have been observed. One is the phenomenon ofunequ al sharing of power flows over the EHV transmission lines connectingthe northe rn and central areas; the other is the bus voltage of OMEIsubstation being too low in some outage cases. Although series compensationmay be applied to contr ol the power flows over transmission lines, the dampingof subsynchronous reson ance (SSR) may be adversely affected. The effect of series capacitors with various compensation ratios andinstallation locations on the damping of SSR mo des in Taiwan power system is evaluated in this thesis. It is found that by co mbining a fixed capacitor (FC)and a static VAR compensator (SVC) into a shunt compensator, we can not only improve the dynamic response of OMEI bus voltage but also increase the dampingof SSR modes over series capacitor compensated sy stem.