Immersion and invariance-based nonlinear dual-excitation and steam-valving control of synchronous generators

Abstract

Summary This paper focuses on designing the nonlinear dual‐excited and steam‐valving control of synchronous generators to enhance the system stability and voltage regulation of an electrical power system. Based on the concept of immersion and invariance technique, the resulting nonlinear controller is used to not only achieve power angle stability, frequency, and voltage regulation but also ensure that the closed‐loop system is transiently and asymptotically stable. In order to show the effectiveness of the proposed controller design, numerical simulation results are provided to illustrate the performance of the proposed controller capable of keeping the system transiently stable and simultaneously accomplishing the system stability and voltage regulation improvement in spite of large disturbances and network changes. Copyright © 2013 John Wiley & Sons, Ltd.

Nonlinear Adaptive Controller Design for Power Systems with STATCOM via Immersion and Invariance

“…From (26), we obtain that x 3 and x 4 are bounded, and thus we can conclude boundedness of x 3 and x 4 , respectively. Finally, boundedness of all trajectories of (31) has been shown; thus, we can deduce that the system (31) has an asymptotically stable equilibrium at x e .…”

“…This method is applicable to practical control design problems for many types of systems, refer to [18] for further details. In particular, transient stability and voltage regulation enhancement of power systems with excitation control, other kinds of FACTS devices, and a superconducting magnetic energy storage (SMES) system has been presented in [15,23,[25][26][27][28].…”

Congestion tracking control for wireless TCP/AQM network via immersion and invariance

“…Besides, the original state will settle down to the desired equilibrium points with a dynamic behavior converging to that of the target dynamics. This scheme applies to practical control design problems for many types of systems such as power systems [23–27], antagonistic joint with nonlinear mechanical stiffness [28], a moving‐mass flight vehicle [29], an induction motor [30], Quadrotors [31], DC‐DC converter [32], unmanned aerial vehicle (UAV) [33], elastic drives, [34], flywheel energy storage system [35], and so on. The interested reader is referred to [21] for more details and other real applications.…”

The coordinated controller design for dual excitation and steam valve of synchronous generator

“…The physical parameters (pu) and initial conditions for this power system model are the same as the parameters chosen in Kanchanaharuthai (2014). From Figure 1, the effectiveness of our control design is verified and the performance is better than the controller given in Kanchanaharuthai (2014). For synchronous generators, this paper designs a coordinated controller of dual excitation and steam valve based on immersion and invariance method.…”

“…Based on immersion and invariance (I&I) technique (Astolfi and Ortega, 2003;Astolfi et al, 2007;Kanchanaharuthai, 2014), this paper designs nonlinear dual excitation and steam valve controller. The controller that has been designed can not only achieve stability of power angle as well as adjustment of frequency and voltage but also improve the transient stability of a closed-loop system.…”