A parametrically optimized self-tuning regulator for power system stabilizers

Ghandakly, A.A.; Farhoud, A.M.

doi:10.1109/59.207340

Cited by 29 publications

(8 citation statements)

References 8 publications

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“…3. These stabilizers introduced additional system damping signals derived from the machine speed or power through the excitation system in order to improve the damping of power swings (Ghandakly and Farhoud 1992). Conventional fixed parameter stabilizers work reasonably well over medium range of operating conditions.…”

Section: Short Termmentioning

confidence: 99%

Transient Stability Enhancement of Power Systems Using Observer-Based Sliding Mode Control

Ouassaid

Maâroufi

Cherkaoui

2014

Advances and Applications in Sliding Mode Control Systems

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The high complexity and nonlinearity of power systems, together with their almost continuously time-varying nature, have presented a big challenge for control engineers, for decades. The disadvantages of the linear controllers/models, such as being dependent on the operating condition, sensibility to the disturbance such as parametric variations or faults can be overcome by using appropriate nonlinear control techniques. Sliding-mode control technique has been extensively used when a robust control scheme is required. This chapter presents the transient stabilization with voltage regulation analysis of a synchronous power generator driven by steam turbine and connected to an infinite bus. The aim is to obtain high performance for the terminal voltage and the rotor speed simultaneously under a large sudden fault and a wide range of operating conditions. The methodology adopted is based on sliding mode control technique. First, a nonlinear sliding mode observer for the synchronous machine damper currents is proposed. Next, the control laws of the complete ninth order model of a power system, which takes into account the stator dynamics as well as the damper effects, are developed. They are shown to be asymptotically stable in the context of Lyapunov theory. Finally, the effectiveness of the proposed combined observer-controller for the transient stabilization and voltage regulation is demonstrated. Nomenculture

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Section: Short Termmentioning

confidence: 99%

Transient Stability Enhancement of Power Systems Using Observer-Based Sliding Mode Control

Ouassaid

Maâroufi

Cherkaoui

2014

Advances and Applications in Sliding Mode Control Systems

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“…Where; x 1 , x 2 , x 8 and x 9 correspond to the state currents i L1d , i L1q , i L2d , and i L2q respectively, on which the systems' active and reactive powers' at the DC terminals of the HVDC Light systems depend as mentioned in Eqs. (13)- (16).…”

Section: Nonlinear Control Strategymentioning

confidence: 99%

“…Active and reactive powers control, as noticed from Eqs. (13)- (16), has been ensured by controlling these currents. Acceptable states and output responses have been obtained when an extra PI controller has been used.…”

Section: Figure (8): Active and Reactive Power Behaviours On Both Ac mentioning

confidence: 99%

“…Therefore, the overall system's performance mainly relies on the identification's accuracy. The self-tuning controller [16] implements the system output tracking and handles the ambiguities and the uncertainties in the system parameters. The variable structure controller [17] provides robustness and insensitivity to system parameter variations and constrains the system trajectory to a sliding mode.…”

Section: Introductionmentioning

confidence: 99%

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Nonlinear Control based Sliding Modes for HVDC Light System Behavioral Enhancement under Parameters Uncertainties

Ramadan

Siguerdidjane

Petit

et al. 2010

The International Conference on Electrical Engineering

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Two different nonlinear control methodologies based robust Sliding Mode Control (SMC) for HVDC Light TM transmission system's possessing parameters uncertainties are proposed. Appropriate feedback signals are formulated to control the active and reactive powers towards their specified set point values and to govern the DC link voltage to its desired value. The first controller maintains the active and reactive powers to their anticipated rated values using their corresponding reference signals directly. The other uses an additional auxiliary controller based proportional-integral (PI) controller or the two degrees of freedom proportional-integral-derivative (2DOF-PID) controller to govern the DC voltage and to generate the necessary direct and quadrature currents reference signals that are inserted to the main controller based SMC in order to control the corresponding powers. The controllers' gains are adjusted using Lyapunov method to guarantee zero tracking error in order to ensure the system's stability. The feasibility and effectivity of both control techniques are evaluated in terms of performance enhancement and their robustness are compared under parameters uncertainties and verified for different DC link lengths using MATLAB © .

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“…In order to obtain high quality transient stability and voltage regulation, many researches has been established and numerous papers are published. The principal conventional excitation controller is represented by the automatic voltage regulator (AVR) [1], [2] and power system stabilizer (PSS) [3]. These controllers are mainly designed by using a linear control theory and work reasonably well over medium range of an operating point.…”

Section: Introductionmentioning

confidence: 99%

A nonlinear voltage controller using T-S fuzzy model for power system

Son

Cho

Ahn

et al. 2007

TENCON 2007 - 2007 IEEE Region 10 Conference

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Major objectives in power system control design are to prevent a losing synchronism after a large sudden fault and to achieve good pre-fault regulation of the generator terminal voltage. Conventional linear controllers for a power system were designed by using a linearization technique at the nominal point and they did not give a good stability after a large disturbance or changing operating points. To overcome this problem, a lot of researches regarding nonlinear control schemes to improve the transient stability and voltage regulation were reported.In this paper, a novel approach is proposed to design a nonlinear voltage controller for a power system. It is designed by using Takagi-Sugeno (T-S) Fuzzy model of the power system based on parallel distributed compensation (PDC) and linear matrix inequalities (LMIs).

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A parametrically optimized self-tuning regulator for power system stabilizers

Cited by 29 publications

References 8 publications

Transient Stability Enhancement of Power Systems Using Observer-Based Sliding Mode Control

Transient Stability Enhancement of Power Systems Using Observer-Based Sliding Mode Control

Nonlinear Control based Sliding Modes for HVDC Light System Behavioral Enhancement under Parameters Uncertainties

A nonlinear voltage controller using T-S fuzzy model for power system

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