An improved adaptive backstepping approach on static var compensator controller of nonlinear power systems. (5th March 2018)

• Record Type: Journal Article
• Authors: Su, Qingyu; Quan, Wanzhen; Cai, Guowei; Li, Jian
• Is Part Of: International journal of adaptive control and signal processing. Volume 32:Number 5(2018)
• Page Start: 700
• Page End: 712
• Publication Date: 2018-03-05
• Subjects: adaptive backstepping -- error compensation -- single‐machine infinite‐bus system -- sliding mode variable structure control -- static var compensator; Adaptive control systems -- Periodicals; Adaptive signal processing -- Periodicals; 629.836
• DOI: 10.1002/acs.2867
• Languages: English
• ISSNs: 0890-6327

Abstract

Summary: The transient stability problem of a single‐machine infinite‐bus system with static var compensator is solved in this paper, where the static var compensator controller is designed by an improved backstepping method combining error compensation, adaptive backstepping control, and sliding mode variable structure control. Crucially, the error compensation term, which chooses in the step of virtual control by the adaptive backstepping method, is introduced to ensure that the system states are bounded, maintaining the nonlinearity of the power systems while also improving the speed of parameter identification. Meanwhile, the Lyapunov function is constituted step by step to achieve stability of the subsystem. In addition, a parameter updating law and a nonlinear control law are explicitly given to asymptotically stabilize the closed‐loop system. Finally, a simulation is used to illustrate the effectiveness and the practicality of the proposed control approach.