Design and Implementation of Delay-Dependent Wide-Area Damping Control for Stability Enhancement of Power Systems

Li, Yong; Zhou, Yang; Liu, Fang; Cao, Yijia; Rehtanz, Christian

doi:10.1109/tsg.2015.2508923

Cited by 66 publications

(28 citation statements)

References 27 publications

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“…One way is to draw the support from the latest findings on time-delay control theories, among which the most widely used are based on Lyapunov stability theory and linear matrix inequality (LMI) technology [8] - [11]. Simulation results in [8], [9] report that these WADCs can tolerate time delay up to 300 ms. In [10], two H∞ control schemes are developed for time-varying multiple delayed systems, where the upper bound of time delay is set to 150 ms in the simulation.…”

Section: Introductionmentioning

confidence: 99%

Unified Residue Method for Design of Compact Wide-area Damping Controller Based on Power System Stabilizer

Zhang

et al. 2020

Journal of Modern Power Systems and Clean Energy

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A wide-area damping controller (WADC) is effective in damping inter-area low-frequency oscillation (LFO), if the time delay in a wide-area control loop can be properly handled. In order to simplify the WADC design and enlarge the delay adaptation range, the classic power system stabilizer (PSS) is adopted, and a new unified residue (UR) method is proposed for compact WADC design. The strategy of control loop selection is also improved by modifying the relative residue index based on a few dominant oscillation modes. The designed PSSbased compact WADC is as simple as classic PSS with no more than two lead-lag phase compensation units. Case studies are carried out on an IEEE 16-machine 68-bus power system. Simulation results demonstrate that the control loop selection before the WADC design is necessary and that the proposed selection strategy can easily pick out the suitable candidate control loops. In addition, it is feasible for the UR method to design WADCs with different time delays in the selected control loops. All the designed WADCs are effective in damping inter-area LFO and robust to time delay variations under operation conditions. Comparisons among five design methods for PSS-based WADC show that the proposed UR method is superior in delay adaptation, the conciseness of WADC structure and computation speed of parameters. Index Terms-Wide-area measurement system (WAMS), time delay, wide-area damping controller (WADC), power system stabilizer (PSS).

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Section: Introductionmentioning

confidence: 99%

Unified Residue Method for Design of Compact Wide-area Damping Controller Based on Power System Stabilizer

Zhang

et al. 2020

Journal of Modern Power Systems and Clean Energy

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“…Therefore, it is important to consider the time delays in the process of damping controller design and find the time delay margin under which wide-area power system remains stable. Various damping controller design techniques are reported in the literature to guarantee the stability of the system by compensating the effect of time-delays [2,4,6,[10][11][12]. In [13][14][15][16], the damping controllers are proposed to compensate the time-delays that occur in the feedback loop based on model predictive control strategy.…”

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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“…With the increasingly serious energy crisis and environmental pollution, renewable energy distributed generation technology has been widely concerned and researched in [1][2][3][4]. The grid-connected inverter is the core of the distributed generation system in [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

A Double Update PWM Method to Improve Robustness for the Deadbeat Current Controller in Three-Phase Grid-Connected System

Yang

Chen

Luo

et al. 2018

Journal of Electrical and Computer Engineering

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In the grid-connected inverter based on the deadbeat current control, the filter inductance variation and single update PWM affect the distortion of the grid current, stability, and dynamic of the system. For this, a double update PWM method for the deadbeat current controller in three-phase grid-connected system is proposed, which not only effectively decreases the grid current distortion and control delay, but also improves the system stability and dynamic response speed due to reducing the characteristic root equation order of the closed-loop transfer function. The influence of the filter inductance deviation coefficient on the system performance is analyzed. As a conclusion, the corresponding filter inductance deviation coefficient in the system critical stability increases with increase in the parasitic resistance of the filter inductance and line equivalent resistance and decreases with increase in the sampling frequency. Considering the system stability and dynamic response, the optimal range of the control parameters is acquired. Simulation and experimental results verify the effectiveness of the proposed method.

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Design and Implementation of Delay-Dependent Wide-Area Damping Control for Stability Enhancement of Power Systems

Cited by 66 publications

References 27 publications

Unified Residue Method for Design of Compact Wide-area Damping Controller Based on Power System Stabilizer

Unified Residue Method for Design of Compact Wide-area Damping Controller Based on Power System Stabilizer

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

A Double Update PWM Method to Improve Robustness for the Deadbeat Current Controller in Three-Phase Grid-Connected System

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