Increasing Chuanyu Grid-to-Central China Mains Grid Power Transfer Capability by 550kiV Fixed Series Capacitor FSC Fengie

In summer of 2005 the Fengjie series compensation system located in the Wanzhou 500kV ac-network has been ordered and designed for delivery, erection and commissioning. The power demand of the growing Chinese industries requires an economical solution for an increase of power transfer capability with the existing lines. Fixed series compensation has been found as the appropriate choice not only to enable the desired power increase but also to stabilize the interconnected networks by reducing the connecting line impedance. Starting of commercial operation of two capacitors located in two serial lines is scheduled for June 2006. This paper will give an overview of the design philosophy of the capacitor system and for the choice of the component rating.