Novel non‐linear control of DFIG and UPFC for transient stability increment of power system

This paper offers novel non-linear control of a doubly fed induction generator (DFIG) and unified power flow controller (UPFC) for transient stability increment with energy function (TEF) sliding mode observer in system. First, the TEF technique is considered damping system synchronous (SG), DFIG, UPFC, then time-derivative signals are estimated by second-order observer. The importance issue employ complete UPFC model. Also, one-axis model used DFIG that similar to SG Another characteristic robust versus topology changes variable time delay signals. To evaluate performance method stability, simulation studies performed on two-machine connected an infinite bus (TMIB), IEEE 9-bus, New England Standard 39-bus results determine decreases first swing fluctuations admissibly enhancement margins considerably.