Variable-structure facts controllers for power system transient stability

Wang, Y.; Mohler, R.R.; Spee, R.; Mittelstadt, W.A.

doi:10.1109/59.141719

Cited by 112 publications

(25 citation statements)

References 9 publications

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“…In case of a fault in the power system, the braking resistor is temporarily inserted in parallel at the nearest end of the generator to absorb the excessive energy produced by the generator acceleration. There are studies examining the use of braking resistors jointly with other devices to increase its efficiency [4][5][6], and we think that there are possibilities of their use for achieving an even better transient stability. Some examples of practical applications of braking resistors can be found in the Bonneville Power Plant (Oregon) [1], Four Corner Power Plant of Public Service Company (Arizona) [1][2][3], and in Owase Mita and Atsumi power plants of Chubu Electric Power Co. (Japan).…”

Section: Introductionmentioning

confidence: 97%

Experimental study on improvement of transient stability with braking resistor

Iida

Imamura

Shirai

et al. 2008

Elect Comm in Japan

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SUMMARYThe electric power industry has undergone considerable changes in the past decade throughout the world. The essential feature of these changes is to promote competition among utilities and to form active power market with reliable and less expensive electricity. Under these circumstances, stabilization and voltage stability problems of power systems are very important. Power systems engineers are examining the effect of the resistance value of braking resistors and the timing of their insertion on the improvement of the stability level.In this paper, we report on experiments carried out on the optimal size and switching of braking resistors, shunt capacitors, and other auxiliary devices. The experimental system model consists of a single synchronous generator connected through two parallel transmission lines to an infinite bus.

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Section: Introductionmentioning

confidence: 97%

Experimental study on improvement of transient stability with braking resistor

Iida

Imamura

Shirai

et al. 2008

Elect Comm in Japan

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“…DP computes the value function in order to find the optimal control with a feedback control policy. Indeed, from the value function the following optimal feedback control policy is deduced (5) Alternatively, one can define so-called function as (6) Then can be expressed as a function of (7) Equation (5) can be rewritten as (8) Equation (8) provides a straightforward way to determine the optimal control law from the knowledge of the . RL algorithms estimate the function by interacting with the system.…”

Section: A Theoretical Frameworkmentioning

confidence: 99%

“…RL algorithms estimate the function by interacting with the system. From the knowledge of the function, they can decide by using (8) which value of the control to associate to a state in order to maximize the discounted return (2). Unfortunately, RL in a continuous state-space implies that the function has to be approximated [18].…”

Section: A Theoretical Frameworkmentioning

confidence: 99%

“…RBs currently in use [3], [5], [7], [8] are large size brakes. The sizing of the RB is a point of great interest.…”

Section: A Technological Underpinningsmentioning

confidence: 99%

“…A variety of approaches have been considered and proposed with the aim of full utilization of RB potential to provide transient damping after large disturbances. These approaches include application of dynamic programming method [7], variable structure control [8], [9], optimal control theory [10], [11], rule-based system [12], fuzzy logic control [13], and artificial neural networks [14]. Recently, the potential of using RB to damp power swings have been investigated [15] and the use of multiple switching operations of the RB for a transient stability emergency control have been reported in [16].…”

Section: Introductionmentioning

confidence: 99%

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Design of a resistive brake controller for power system stability enhancement using reinforcement learning

Glavić

2005

IEEE Trans. Contr. Syst. Technol.

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Abstract-Computation of the closed-loop control laws, capable to realize multiple switching operations of a resistive brake (RB) aimed to enhance power system stability, is the primary topic of this brief. The problem is formulated as a multistage decision problem and use of a model-based reinforcement learning (RL) method, known as prioritized sweeping, to compute the control law is considered. To illustrate the performances of the proposed approach results obtained using the model of a synthetic four-machine power system are given. Handling measurement transmission delays is discussed and illustrated.Index Terms-Closed-loop control, multiple switching, power system stability, reinforcement learning (RL), resistive brake (RB).

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Method of Stabiiizing Power Systems Using Variable Series Impedance

Senjyu

Uezato

1995

Electrical Engineering Japan

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The stabilizing facilities for power systems, i.e., series capacitor, system damping resistor, superconducting magnetic energy storage (SMES), phase shiftcr, etc., are used to improve the stability of synchronous generators. The control principle of these facilities to enhance the system damping is the same in the sense that these stabilizers control the active power so as to stabilize power systems. The generalized control method for these facilities has not been studied from the viewpoint of active power control. The generalized control method applying the variable structure control from the viewpoint of acceleration power for the synchronous generators is proposed in this paper. The variable structure control can be applied to both nonlinear and linear systems and has robustness against parameter variations. In this paper, the control law is derived first in general form from the viewpoint of active power in the synchronous generator. This control law can take into account the automatic voltage regulator and governor effect indirectly. The feedback gains of the controller can be determined taking into account parameter variations in the synchronous generator. Second, this method is applied to the one‐machine infinite‐bus system with a variable series inductance so as to investigate the validity of this control method. The simulation results show that the controller is able to improve the system damping of the power system and is especially effective against parameter variations.

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Variable-structure facts controllers for power system transient stability

Cited by 112 publications

References 9 publications

Experimental study on improvement of transient stability with braking resistor

Experimental study on improvement of transient stability with braking resistor

Design of a resistive brake controller for power system stability enhancement using reinforcement learning

Method of Stabiiizing Power Systems Using Variable Series Impedance

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