Application of FACTS devices for the interconnected line between Fujian network and Huadong network

In order to improve the stability of Fujian power system and provide power energy to Huadong power system, a 500 kV interconnected line which is more than 500 km long will be laid to connect Fujian network and Huadong network. For the interconnected line is long and poor damping, power flow oscillations will arise on the interconnected line when there are some faults in Fujian or in Huadong. The oscillations will cause generators entering into asynchronous operations between Fujian and Huadong. In this paper, two FACTS (flexible AC transmission systems) devices are introduced into the system to improve the stability of the interconnected lint: one is the static VAr compensator (SVC); and the other is the thyristor controlled series capacitor (TCSC). The abilities of the two devices improving the stability of the interconnected line are described and compared in the paper. Several related objects are presented to discussion at the end of this paper