Power system supplementary damping controllers in the presence of saturation

Raoufat, M. Ehsan; Tomsovic, Kevin; Djouadi, Seddik M.

doi:10.1109/peci.2017.7935756

Cited by 10 publications

(3 citation statements)

References 25 publications

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“…In the case of developing wide area damping controllers (WADCs), there are different techniques which have been concentrated for developing WADC strategies including investigating WADC performances as additional controller, [3][4][5][6][7][8][9] applying renewable suppliers as damping controllers in the case of inter-area oscillations, [10][11][12][13][14] use of HVDC links in long transmission lines for controlling the inter-area oscillations between two oscillating areas [15][16][17] and investigating FACTS-based WADCs installed at long transmission lines to damp inter-area oscillations. 18,19 However, in fact, there are various reliability challenges including communication links which avoid the use of WADC schemes in real interconnected power systems.…”

Section: Literature Reviewmentioning

confidence: 99%

Adaptive wide area damping controller for damping inter‐area oscillations considering high penetration of wind farms

Alinezhad

Radmehr

Ranjbar

2020

Int Trans Electr Energ Syst

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Summary An online and non‐model‐based wide area damping controller (WADC) is presented in this paper for damping inter‐area oscillations in the presence of high penetration of renewable energies. For this propose, based on wide area measurement system (WAMS) technology and evaluating the system dynamic behavior within real‐time environment, the oscillating generators against each other are identified from which corresponding global inter‐area controlling signals are provided. The proposed WADC is consisting of three different individual parts including (a) Identifying inter‐area oscillations, (b) Evaluating inter‐area signals, and (c) Estimating controlling signals with respect to reach high damping ratio of inter‐area oscillations. In the first part, based on coherency concept and evaluating global signals gathered from WAMS data, the generators coherency factors and expected inter‐area oscillations are identified. In the case of evaluating an inter‐area oscillation in the second part, the proposed WADC scheme is activated from which the initial damping ratio and candidate generators with high penetration on damping procedure of inter‐area oscillation are determined. Finally, in the third part, the proper gain factors are estimated with respect to each inter‐area signal form which the individual controlling signals for damping inter‐area oscillations are provided. In order to evaluate damping performance, the proposed WADC scheme and corresponding different parts are carried out on modified 39‐bus test system considering different operational and topological conditions with the potential of unstable inter‐area oscillations. Simulation studies indicate the effectiveness of proposed WADC scheme with high penetration for damping inter‐area oscillations.

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Section: Literature Reviewmentioning

confidence: 99%

Adaptive wide area damping controller for damping inter‐area oscillations considering high penetration of wind farms

Alinezhad

Radmehr

Ranjbar

2020

Int Trans Electr Energ Syst

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“…These saturation limits restrict the output signal of the damping controller within the range of permissible values which in turn reduce the signal need for the damping of inter-area oscillations and therefore affect the overall closed-loop system performance [23]. In power system literature, very limited research has been directed on the effect of actuator saturation on the power system stability [24][25][26][27]. However, these works have not considered the effect of time-delays.…”

Section: Introductionmentioning

confidence: 99%

Anti‐windup compensator design for power system subjected to time‐delay and actuator saturation

Obaiah

Subudhi

2019

IET Smart Grid

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In this study, a delay-dependent anti-windup compensator (AWC) is designed for supplementary damping control (SDC) of flexible AC transmission system (FACTS) device to enhance the damping of inter-area oscillations of the power system subjected to time-delay and actuator saturation. By employing global signal measurements, an SDC of FACTS device is designed without considering the effect of time-delay and actuator saturation to stabilise the power system using a robust output feedback controller with pole placement approach. Then, based on the generalised sector condition and Lyapunov-Krasovskii functional, an add-on delay-dependent AWC is designed to mitigate the adverse effect of time-delay and actuator saturation non-linearity. For the design of delay-dependent AWC, sufficient conditions guarantee the asymptotic stability of the closed-loop power system are formulated in the form of linear matrix inequalities (LMIs). These conditions are cast into the LMI-based convex optimisation problem to compute the AWC gains. To evaluate the effectiveness of the proposed controller, non-linear simulations were performed first using MATLAB/Simulink. Then, the authors implemented the proposed controller in real-time using the Opal-RT digital simulator. From the obtained results, it is observed that the proposed controller enhances the damping of inter-area oscillations by compensating the effect of time delay and actuator saturation.

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“…The substation placement method and transmission lines assignment based on population and energy data in [21] uses the methodology introduced in [22], [23], where they employ a clustering technique to ensure that synthetic substations meet realistic proportions of load and generation. [24] addressed the need for synthetic large-scale system dynamic models for transient stability studies such as wide-area damping control in [25], [26] and dynamic control allocation for damping of inter-area oscillations in [27]. The collaboration of researchers from five universities has resulted to publishing three fully synthetic power networks called ACTIVSg200, 500, and 2000 cases [21], [24].…”

Section: Introductionmentioning

confidence: 99%

Interdependence of Transmission Branch Parameters on the Voltage Levels

Athari¹,

Wang²

2018

Proceedings of the 51st Hawaii International Conference on System Sciences

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Transformers and transmission lines are critical components of a grid network. This paper analyzes the statistical properties of the electrical parameters of transmission branches and especially examines their interdependence on the voltage levels. Some interesting findings include: (a) with appropriate conversion of MVA rating, a transformer's per unit reactance exhibits consistent statistical pattern independent of voltage levels and capacity; (b) the distributed reactance (ohms/km) of transmission lines also has some consistent patterns regardless of voltage levels; (c)other parameters such as the branch resistance, the MVA ratings, the transmission line length, etc, manifest strong interdependence on the voltage levels which can be approximated by a power function with different power constants. The results will be useful in both creation of synthetic power grid test cases and validation of existing grid models.

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Power system supplementary damping controllers in the presence of saturation

Cited by 10 publications

References 25 publications

Adaptive wide area damping controller for damping inter‐area oscillations considering high penetration of wind farms

Adaptive wide area damping controller for damping inter‐area oscillations considering high penetration of wind farms

Anti‐windup compensator design for power system subjected to time‐delay and actuator saturation

Interdependence of Transmission Branch Parameters on the Voltage Levels

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