Design of series and shunt FACTS controller using adaptive nonlinear coordinated design techniques

A nonlinear coordinated generator excitation, static phase shifter (SPS) and static VAr compensator (SVC) controller is proposed to enhance the transient stability of a power system. The proposed controller is novel since it is able to control the three main parameters affecting AC power transmission-voltage, phase angle and reactance-in a coordinated manner. The SPS is located near the generator terminal and the SVCs are located at the midpoint of each transmission line in a power system. a nonlinear feedback control law is found which linearizes and decouples the power system. The coordinated controller consists of three separate controllers: an adaptive excitation and SPS controller; and two SVC controllers. These controllers are designed based on local measurements only. The results show that the proposed nonlinear coordinated series and shunt FACTS controller is able to enhance the transient stability of a single-machine-infinite-bus (SMIB) power system.