A desensitized controller for voltage regulation of power systems

Heniche, A.; Bourlès, Henri; Houry, M.

doi:10.1109/59.466503

Cited by 42 publications

(14 citation statements)

References 14 publications

(5 reference statements)

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“…These efforts have resulted in designs of linear and nonlinear controllers for excitation control, many of which integrate requirements for both stabilization and voltage regulation, with and without the inclusion of a traditional Power System Stabilizer (PSS) [1][2][3][4][5]. In [6] and [7], more robust control has been used to affect a trade-off between Automatic Voltage Regulator (AVR) and small signal PSS. In one practical scheme called discontinuous excitation control (DEC) [8], a transient stability control module is switched as required to augment the usual PSS.…”

Section: Introductionmentioning

confidence: 99%

Analysis of inter-area mode oscillations using intelligent system-centric controllers

Swann

Kamalasadan

2010

IEEE PES General Meeting

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In this paper, we analyze the inter-area mode oscillations in a two-area power system network using a new class of intelligent adaptive control systems based on a system-centric approach used for the control of multiple generators. The proposed architecture consists of a Model Reference Adaptive Controller (MRAC) operating in parallel with a Radial Basis Function Neural Network (RBFNN) to control individual generator oscillations in the presence of disturbances. The underlying structural feature is the introduction of an Intelligent Supervisory Loop (ISL) to augment a conventional adaptive controller. The main advantage is that the proposed architecture provides individual generator control as well as suppresses interarea mode oscillations in a two area, five machine, eight bus power system network in the presence of torque and fault disturbances.

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Section: Introductionmentioning

confidence: 99%

Analysis of inter-area mode oscillations using intelligent system-centric controllers

Swann

Kamalasadan

2010

IEEE PES General Meeting

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“…A coordinated AVR and PSS control has been presented for a single machine infinite bus (SIMB) system which allows coordinated trade-off of voltage regulation and damping enhancements [10]. A robust linear controller has been proposed to solve the problem of control action coordination due to variations in the generator terminal voltage and electric power [13]. A unified approach for a voltage regulator and PSS design based on predictive control in the s-domain is presented in Ref.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Transient Stability Limit and Voltage Regulation with Dynamic Loads Using Robust Excitation Control

Hossain

Mahmud

Roy³

et al. 2013

International Journal of Emerging Electric Power Systems

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In stressed power systems with large induction machine component, there exist undamped electromechanical modes and unstable monotonic voltage modes. This article proposes a sequential design of an excitation controller and a power system stabiliser (PSS) to stabilise the system. The operating region, with induction machines in stressed power systems, is often not captured using a linearisation around an operating point, and to alleviate this situation a robust controller is designed which guarantees stable operation in a large region of operation. A minimax linear quadratic Gaussian design is used for the design of the supplementary control to automatic voltage regulators, and a classical PSS structure is used to damp electromechanical oscillations. The novelty of this work is in proposing a method to capture the unmodelled nonlinear dynamics as uncertainty in the design of the robust controller. Tight bounds on the uncertainty are obtained using this method which enables high-performance controllers. An IEEE benchmark test system has been used to demonstrate the performance of the designed controller.

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“…Recently, several control methods have been made to coordinate the various requirements for stabilization and voltage regulation within the one controller (8)- (12) . A desensitized controller based on Linear Quadratic Gaussian (LQG) optimal technique is used in Ref.…”

Section: Introductionmentioning

confidence: 99%

“…A desensitized controller based on Linear Quadratic Gaussian (LQG) optimal technique is used in Ref. (8). An approach used in Ref.…”

Section: Introductionmentioning

confidence: 99%

Robust Coordinated AVR-PSS Design Using H.INF. Static Output Feedback Control

Bevrani

Hiyama

2007

IEEJ Trans. PE

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Keywords: H∞ control, static output feedback, LMI, voltage regulation, power system stabilizer, robust performance Power system stability and voltage regulation have been considered as an important problem for secure system operation over the years. Currently, because of expanding physical setups, functionality and complexity of power systems, the mentioned problem becomes a more significant than the past. That is why in recent years a great deal of attention has been paid to application of advanced control techniques in power system as one of the more promising application areas.Conventionally, the automatic voltage regulation and power system stabilizer (AVR-PSS) design is considered as a sequential design including two separate stages. Firstly, the AVR is designed to meet the specified voltage regulation performance and then the PSS is designed to satisfy the stability and required damping performance. It is well known that the stability and voltage regulation are ascribed to different model descriptions, and it has been long recognized that AVR and PSS have inherent conflicting objectives. Therefore, successful achievement of both goals using nonintegrated design approach turns out to be very difficult, and, it is reasonable to realize a compromise between the desired stability and regulation performances by a unique controller.In the last two decades, several control methods have made to coordinate the various requirements for stabilization and voltage regulation within the one controller. Some studies have been considered an integrated design approach to AVR and PSS design using domain partitioning, robust pole-replacement, adaptive control, Linear Quadratic Gaussian (LQG) optimal technique, Internal Model Control (IMC) method, fuzzy logic and nonlinear control design approaches. However, because of complexity of control structure, numerous unknown design parameters and neglecting real constraints, the proposed linear control methods are not well suited to meet the design objectives for a multi-machine power system. The performance of those nonlinear schemes that use a switching strategy of two different kinds of controller to cover the different behavior of system operation during transient period and post-transient period is highly depended upon the selection of switching time. Moreover, using different control surfaces through a nonlinear structure increases the complexity of designed controllers.In this paper, the stabilization and voltage regulation considering the practical constraints for feasibility are formulated via an H∞ static output feedback (H∞-SOF) control problem which it can be easily solved using an iterative linear matrix inequalities (LMI) algorithm. The resulting controller is not only robust but it also allows direct and effective trade-off between voltage regulation and damping performance. The proposed controller uses the measurable signals and has merely proportional gains; In result it gives considerable promise for implementation, especially in a multi-machine system. In fact the...

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A desensitized controller for voltage regulation of power systems

Cited by 42 publications

References 14 publications

Analysis of inter-area mode oscillations using intelligent system-centric controllers

Analysis of inter-area mode oscillations using intelligent system-centric controllers

Enhancement of Transient Stability Limit and Voltage Regulation with Dynamic Loads Using Robust Excitation Control

Robust Coordinated AVR-PSS Design Using H.INF. Static Output Feedback Control

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