Averaged modelling and nonlinear control of an ASVC (advanced static VAr compensator)

Petitclair, P.; Bacha, Seddik; Rognon, Jean-Pierre

doi:10.1109/pesc.1996.548666

Cited by 45 publications

(40 citation statements)

References 6 publications

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“…Since the IOL method only considers the stability and tracking performance of the output from the output feedback controller, and the internal dynamics are not handled properly. For the type 2 STATCOMs, it has two-dimensional lightly damped internal dynamics including both the active current and DC voltage [6]. Moreover, Petitclair et al [7] added a damping term to the input in order to decrease the oscillation amplitude of the internal dynamics.…”

Section: Feedback Linearizationmentioning

confidence: 99%

“…In the IOL system, even though the stability and the tracking performance of the output are guaranteed because of an output feedback controller, those of the internal dynamics are not guaranteed [4,5]. For the STATCOM system, Petitclair et al designed an IOL controller in [6] and later added a damping term to the input in order to bring the improved stability and transient performance of the internal dynamics [7]. However, it cannot guarantee the system to be internally stable at every operating point with the constant gain of damping term.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Robust Nonlinear Control of STATCOMs

Gui

Kim

Han

et al. 2014

Static Compensators (STATCOMs) in Power Systems

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Many nonlinear control techniques for STATCOM systems are available nowadays. In this chapter several nonlinear feedback controller design techniques relatively simpler and more robust are to be introduced: input-output feedback linearization (IOL) method, passivity-based control (PBC) method, port-controlled Hamiltonian (PCH) method with dynamics extension method. The IOL method has been applied to STATCOM and it shows uniform transient performance. However, the oscillatory response owing to the lightly damped internal dynamics could negatively affect the life cycle of the system and power quality. A modified IOL control scheme is introduced to improve the damping of internal dynamics of performance while preserving overall system stability. Although the IOL methods improve the performance of type 2 STATCOM systems, these methods are sensitive to parameter uncertainty. Moreover, when the system is working in the inductive operating range, undesired oscillatory transient response appears in the DC voltage due to its lightly damped internal dynamics with the IOL method. The PBC method considers the dynamics characteristics of type 2 STATCOM systems, in particular its passive characteristics. Employing the PBC method improves the robustness of controller implementation and simplifies implementation compared to the IOL method in such a way that it avoids canceling the system

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Section: Feedback Linearizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Robust Nonlinear Control of STATCOMs

Gui

Kim

Han

et al. 2014

Static Compensators (STATCOMs) in Power Systems

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show abstract

“…In nonlinear controller, the Generalized Averaged Method [8] has been used to determine the nonlinear time invariant continuous model of the system [9][10][11]. This model has been used to present a nonlinear control law based on exact linearization via feedback for STATCOM [12].…”

Section: Introductionmentioning

confidence: 99%

“…This method is particularly interesting because it transforms a nonlinear system into a linear one in terms of its input-output relationship. In [9][10], only q axis current has been regulated, but it should be noted that unlike other shunt compensators, large energy storage device that have almost constant DC voltage, makes STATCOM more robust and it also enhances the response speed. Therefore, there are two control objectives implemented in STATCOM.…”

Section: Introductionmentioning

confidence: 99%

Optimization of PI Controller Gains in Nonlinear Controller of STATCOM Using PSO and GA

Farokhnia¹,

Khoraminia²,

Gharehpetian³

2024

RE&PQJ

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“…The closed loop of the feedback linearised system has a linear input-output behaviour resulting in asymptotic tracking performance with a linear controller [8,9]. The IOL STATCOM system has two-dimensional lightly damped internal dynamics including both the active current and DC voltage [10]. In the IOL system, even though the stability and the tracking performance of the output are guaranteed because of an output feedback controller, those of the internal dynamics are not guaranteed [8,9].…”

Section: Introductionmentioning

confidence: 99%

Output tracking control with enhanced damping of internal dynamics and its output boundedness for static synchronous compensator system

Lee

Han

Chung

2012

IET Control Theory Appl.

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This study investigates an important and challenging problem in non-linear systems: achieving output tracking control with a tolerable error bound as well as providing enhanced damping control of the internal dynamics. This problem is solved by using a damping controller in an input-output linearised static synchronous compensator system. The controllability and observability analyses direct the authors how to determine the damping controller gain. The proposed controller provides improved damping for lightly damped internal dynamics with degraded but tolerable output tracking performance. Finding a parameter-dependent Lyapunov function for the zero dynamics of error dynamics proves the stability of the damped internal dynamics in the time-invariant and time-varying systems. Stability of the closed-loop system is established by designing a composite Lyapunov function and it ensures that the tracking error of the output, in the approximated input-output linearised system, remains within a specified bound. Through stability analysis, the damping controller and the desired reference trajectory providing uniform boundedness of tracking error in output can be designed.

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Averaged modelling and nonlinear control of an ASVC (advanced static VAr compensator)

Cited by 45 publications

References 6 publications

Robust Nonlinear Control of STATCOMs

Robust Nonlinear Control of STATCOMs

Optimization of PI Controller Gains in Nonlinear Controller of STATCOM Using PSO and GA

Output tracking control with enhanced damping of internal dynamics and its output boundedness for static synchronous compensator system

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