In this paper, the nonlinear robust control approach is adopted to Advanced Var compsator (ASVG) control. Based on the power system dynamics, the framework of dissipative system theory and the approach of nonlinear di...
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In this paper, the nonlinear robust control approach is adopted to Advanced Var compsator (ASVG) control. Based on the power system dynamics, the framework of dissipative system theory and the approach of nonlinear disturbance attenuation in the sense of L2-gain, the robustcontrol dynamic model of ASVG in a one-machine, infinite-bus system has been established. The torque disturbance acting on rotating shaft of the generator set and the disturbance to output voltage of ASVG are considered in the model. A recursive approach is applied to construct the energy storage function of the system such that the solution of the control problem is acquired, which avoids the difficulty from solving Hamilton-Jacobi-Isaacs inequality. Thus, the nonlinear disturbance attenuation control strategy of ASVG is obtained. The simulation results demonstrate that ASVG with the proposed controller can more effectively improve the voltage stability, damp the oscillation, and enhance the transient stability of power systems.
This paper presents a dynamic state feedback approach to the semiglobal stabilization of nonlinear systems with minimum-phase dynamic input uncertainties. The assumption needed to get this new result is weaker in one ...
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This paper presents a dynamic state feedback approach to the semiglobal stabilization of nonlinear systems with minimum-phase dynamic input uncertainties. The assumption needed to get this new result is weaker in one direction than the assumption of input feedback passivity or that of nonlinear small gain.
A new nonlinear voltage controller is proposed in this paper. The design of this controller involves the direct feedback linearization (DFL) technique and robustcontrol theory. The performance of the proposed nonline...
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A new nonlinear voltage controller is proposed in this paper. The design of this controller involves the direct feedback linearization (DFL) technique and robustcontrol theory. The performance of the proposed nonlinearcontroller in a single machine-infinite bus power system is simulated. The simulation results show that both voltage regulation and system stability enhancement can be achieved with this proposed controller, regardless of the system operating condition, and compared to other kinds of controllers, the proposed nonlinearcontroller gives better dynamic performance and robustness. Copyright (C) 1996 Elsevier Science Ltd
In this paper we investigate the design of robust state feedback control strategies for a general model of Autonomous Underwater Vehicle using Lyapunov techniques. More precisely, we first define a nonlinearcontrolle...
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In this paper we investigate the design of robust state feedback control strategies for a general model of Autonomous Underwater Vehicle using Lyapunov techniques. More precisely, we first define a nonlinearcontroller on the basis of a nominal model, and then, after introducing a suitable representation of model uncertanties, we evaluate its robustness properties by means of Lyapunov techniques. Then, we derive, by Lyapunov design, a modified controller which guarantees ultimate uniform boundedness of the tracking error against plant perturbations. The effectiveness of the proposed methodology is proved by discussing a case study and related simulation results.
The so-called recursive-interlacing procedure is a Lyapunov-based design for systems not satisfying either the matching conditions or the conditions of being equivalently matched or the generalized matching conditions...
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The so-called recursive-interlacing procedure is a Lyapunov-based design for systems not satisfying either the matching conditions or the conditions of being equivalently matched or the generalized matching conditions. A class of nonlinear uncertain systems of third order vector is presented for which robustcontrol is designed.
This paper concerns a general dissipative control problem for nonlinear systems with full state feedback. This problem includes positive real control and H-infinity control problems as special cases. The paper shows t...
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ISBN:
(纸本)0780335910
This paper concerns a general dissipative control problem for nonlinear systems with full state feedback. This problem includes positive real control and H-infinity control problems as special cases. The paper shows that the solution to the control problem is equivalent to the existence of a solution to a partial differential inequality.
This paper presents a case study of a static VAR system (SVS) installed for voltage control and power oscillation damping. The SVS provides voltage support of a long transmission line and is equipped with power oscill...
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This paper presents a case study of a static VAR system (SVS) installed for voltage control and power oscillation damping. The SVS provides voltage support of a long transmission line and is equipped with power oscillation damping equipment. The power system is modelled as a single-machine infinite-bus system with an automatic voltage regulator in the generator representation. The current control scheme of the SVS is modelled in EMTP and compared with a variable structure control (VSC) system.
This paper presents a sliding mode control strategy for cars with an active steering system. The goal of control is to achieve a fixed dynamic relationship between the driver’s steering command and the vehicle’s yaw...
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This paper presents a sliding mode control strategy for cars with an active steering system. The goal of control is to achieve a fixed dynamic relationship between the driver’s steering command and the vehicle’s yaw rate in spite of a wide range of car and road parameters and varying operating conditions. The steady behavior should still be similar to conventional cars. control design is based on a linear single track model and exploits the invariance property of sliding mode control. Implementational issues of the design process are discussed in detail in the form of robust continuous nonlinearcontroller to avoid chattering.
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