Design and implementation of a measurement-based adaptive wide-area damping controller considering time delays

Bai, Feifei; Zhu, Lin; Li, Fangxing; Wang, Xiaoru; Sun, Kai; Ma, Yiwei; Patel, Mahendra; Farantatos, Evangelos; Bhatt, Navin

doi:10.1016/j.epsr.2015.08.009

Cited by 37 publications

(12 citation statements)

References 33 publications

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“…Step 2: Calculate the gravity center (K IG_jk , K DG_jk ) and the area (S jk ) of every triangle in Figure 3B by (8), where…”

Section: S1: Robustness-oriented Principlementioning

confidence: 99%

“…Besides, the lead-lag phase compensator can also be designed to reimburse the delay's effect on phase shift of feedback signals. 8,9 In time domain, the signal prediction is another way to eliminate the influence from time delay on control performance. 10 Obviously, the delay compensation in either frequency or time domain will complicate controllers' structure.…”

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confidence: 99%

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PID damper design for wide‐area power systems considering time delays

Liu

2020

Int Trans Electr Energ Syst

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Wide-area damping control is able to improve the stability of interconnected power systems in case of low-frequency oscillations. Nevertheless, the damping effect is closely related to the time delay of wide-area control loops. The application potential of proportional-integral-derivative (PID) damper is explored in wide-area power system damping control. First, the relative residue index based on dominant oscillation modes is employed to determine a suitable control loop. Then, the PID stability space is calculated numerically based on extended Hermite-Biehler Theorem. Finally, the damping-robustness balance principle is discussed in the PID parameters selection. The proposed PID damper is tested by supplementing the generator excitation control in the two-area four-machine power system and the static var compensator control in the 16-machine 68-bus power system. Simulation results confirm that it is feasible to design a PID damper for the control loop with a larger relative residue index. The designed PID damper is able to enhance power system stability by inhibiting low-frequency oscillations under considerable time delays, and it is robust to the changes of system operation state and time delay.

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“…Step 2: Calculate the gravity center (K IG_jk , K DG_jk ) and the area (S jk ) of every triangle in Figure 3B by (8), where…”

Section: S1: Robustness-oriented Principlementioning

confidence: 99%

mentioning

confidence: 99%

PID damper design for wide‐area power systems considering time delays

Liu

2020

Int Trans Electr Energ Syst

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“…In wide-area damping control, it is necessary to balance the processing of time delay and the enhancement of damping capability. This problem can be solved by directly adopting the time-delay control theory which is usually complex and obscure [7]- [11], or using the Pade approximation [12]- [14] or delay compensation [15]- [20] to simplify the controller design. Wide-area damping controllers (WADCs) can be classified into the following two categories according to the differences in WADC structure shown in Fig.…”

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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“…Most LFOs in power system can be classified into 2 categories. One is LFOs of negative damping mechanism, which results from the lack of damping of oscillation mode . The other is the forced oscillations caused by external fluctuating power disturbances .…”

Section: Introductionmentioning

confidence: 99%

Suppression of power system forced oscillations based on PSS with proportional-resonant controller

Feng

Jiang

2017

Int. Trans. Electr. Energ. Syst.

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Power system forced oscillations are low-frequency oscillations caused by external fluctuating power disturbances. They could still happen even when power system stabilizers (PSSs) are installed, jeopardizing the safety and stability of power grid seriously. The reason for the unsatisfying suppression performance of PSS on forced oscillations is investigated in this paper. The result reveals that limited by the critical stability gain, conventional PSS is hard to mitigate forced oscillations effectively while maintaining the stability of power system. Then, aiming at suppressing forced oscillations, a novel PSS with proportional-resonant controller is proposed. By leveraging proportional-resonant controller, the amplification factor of the disturbance at the oscillation frequency is reduced significantly without approaching the critical stability gain. Hence, the stability of the system is not influenced. The simulation results in 16-machine and 68-bus system demonstrate that, compared with conventional PSS, the proposed method has better performance on suppressing forced oscillations of both single mode and multimode caused by various types of disturbances.KEYWORDS critical stability gain, forced oscillations, power system stabilizer, proportionalresonant controller | INTRODUCTIONLow-frequency oscillations (LFOs) have been one of the major problems threatening the stability of large-scale power systems, 1,2 which attract extensive concern of researchers.Most LFOs in power system can be classified into 2 categories. One is LFOs of negative damping mechanism, which results from the lack of damping of oscillation mode. 3,4 The other is the forced oscillations caused by external fluctuating power disturbances. 5,6 As more renewable energy resources Abbreviations: Inertia constant of the generator; δ, Power angle of the generator; ω, Rotor speed of the generator; P d , Power disturbance; P e , Active power output of generator; K 1 , Synchronous torque coefficient; D, Damping torque coefficient; ω b , Base values for angular speed; Δ, Small perturbations in the corresponding variables; M, Inertia constant of the generator in pu speed deviation; K D , Damping torque coefficient in pu speed deviation; s, Laplace operator; G(s), Transfer function from ΔP d to ΔP e ; A d , Amplification factor of the power disturbance; β, Damping coefficient; r, Amplitude of the disturbance; │ΔP e │, Amplitude of active power oscillation of generator; ω r , The resonance frequency; ω n , The natural frequency of the system; A dmax , The maximum value of A d ; V in , Input signal of CPSS; V S , Output signal of CPSS; G PSS (s), Transfer function of CPSS; K s , Gain of CPSS; T w , The time constant of washout block; T 1 , T 2 ,T a , Time constants of the phase compensation block; n, The number of the phase compensation blocks; V Smax , V Smin , The upper and lower limit of the output signal of CPSS; G AVR (s), Transfer function of excitation system with automatic voltage regulator; G FFD (s), The transfer function of the field flux decay; G...

show abstract

Design and implementation of a measurement-based adaptive wide-area damping controller considering time delays

Cited by 37 publications

References 33 publications

PID damper design for wide‐area power systems considering time delays

PID damper design for wide‐area power systems considering time delays

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

Suppression of power system forced oscillations based on PSS with proportional-resonant controller

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