Adaptive Delay Compensator for the Robust Wide-Area Damping Controller Design

Beiraghi, Mojtaba; Ranjbar, Ali Mohammad

doi:10.1109/tpwrs.2016.2520397

Cited by 80 publications

(31 citation statements)

References 22 publications

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“…There are four possibilities for the location of total phase shift θ. The equations for these phase shifts are defined in (17).…”

Section: Proposed Ur Methods For Wadc Designmentioning

confidence: 99%

“…1(b), the delayfree controller block can use conventional control methods like the residue-based approach, the pole placement method, H2/H∞ robust control strategy, etc. The delay compensation block can be a signal prediction module based on a linear polynomial [15] or exponential function [16], [17], system models [18], [19], or a transfer function for lead-lag phase compensation [20]. The tolerance to a large-scale time delay above 1000 ms is reported in [18], [19], and most of the simulation cases in [15]- [17], [20] are carried out under a time delay around 500 ms.…”

Section: Introductionmentioning

confidence: 99%

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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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“…There are four possibilities for the location of total phase shift θ. The equations for these phase shifts are defined in (17).…”

Section: Proposed Ur Methods For Wadc Designmentioning

confidence: 99%

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

View full text Add to dashboard Cite

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“…Further, based on the MIMO identification, transfer function of the power system can be developed as shown in equation (9) [33]- [37]. In (9), ∆ω m is the difference between rated and actual speed of the generator, u p is the input signal ( Fig. 9), k the order of transfer function and h is the element number in matrix.…”

Section: Yes Nomentioning

confidence: 99%

“…9), k the order of transfer function and h is the element number in matrix. From (9), it can be seen that all transfer functions in (8) have same denominator coefficients but unique numerator coefficients. This ensures that coupling between different loops are considered while identifying the MIMO system.…”

Section: Yes Nomentioning

confidence: 99%

Coherency and Online Signal Selection Based Wide Area Control of Wind Integrated Power Grid

Thakallapelli

Hossain

Kamalasadan

2018

IEEE Trans. on Ind. Applicat.

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This paper introduces a novel method of designing Wide Area Control (WAC) based on a discrete Linear Quadratic Regulator (LQR) and Kalman filtering based state-estimation that can be applied for real-time damping of inter-area oscillations of wind integrated power grid. The main advantages of the proposed method are that the architecture provides: a) online coherency grouping that properly characterizes real-time changes in the power grid, and b) online wide-area signal selection based on residue method for proper selection of the WAC signals. The proposed architecture can thus accurately monitors changes in the power grid and select the appropriate control signal for more effectively damping the inter-area oscillation when compared to the conventional local signal based Power System Stabilizers (PSS) or offline based WAC designs. The architecture is tested on a wind integrated two-area system and IEEE 39 bus system in order to show the capability of proposed method.

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“…The performance of the H ∞ robust current controller has been described in a DFIG model under parameter perturbations and disturbances . Designing of the robust controller for current‐sharing improvement, stability enhancement of the power system with wide‐area damping, and voltage/pitch control have been presented in the literature.…”

Section: Introductionmentioning

confidence: 99%

Adaptive filtering with robust controller for improvement of inertial response of wind turbine

Aali

Besmi

Kazemi

2019

Int Trans Electr Energ Syst

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Summary It is necessary to study the impact of large‐scale wind turbines with virtual inertia control on power system stability considering the effects of frequency measurement. The phase‐locked loop (PLL) measures the system frequency. The operation of the PLL is deteriorated when the voltage contains sags, unbalance, high harmonics, and sudden drop frequency. Cascaded delayed signal cancelation (DSC) PLL technique can be used for frequency measurement under nonideal voltage due to its good harmonics filtering capability. But there are some oscillations and errors in the frequency estimation by the DSC‐PLL that led not to suitable frequency control in a doubly fed induction generator (DFIG). In this paper, an adaptive complex least mean square (ACLMS) algorithm is used for frequency estimation. The ACLMS algorithm is an adaptive filter, which can track frequency deviation, accurately and rapidly. In addition, this paper addresses robust frequency control in the DFIG. In a power system with wind turbines, load change, power fluctuation disturbance, and a dynamical perturbation influence the system frequency. In this condition, the conventional‐inertia controller is faced with challenges. H∞‐robust controller develops the frequency control loop. The estimated frequency using the ACLMS algorithm feeds the robust controller to improve the inertial response of the DFIG. This paper compares between H∞ and optimal conventional‐based inertia controller. The simulation validates that the ACLMS estimation with the H∞ inertia controller simultaneously provides frequency support to a low‐inertia tested power system, effectively. It improves frequency stability and resiliency under different disturbances and uncertainty.

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Adaptive Delay Compensator for the Robust Wide-Area Damping Controller Design

Cited by 80 publications

References 22 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

Coherency and Online Signal Selection Based Wide Area Control of Wind Integrated Power Grid

Adaptive filtering with robust controller for improvement of inertial response of wind turbine

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