Critical Clearing Time Sensitivity for Differential-Algebraic Power System Model

Mishra, Chetan

doi:10.1109/tpwrs.2020.3040625

Cited by 4 publications

(2 citation statements)

References 17 publications

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“…Te calculation of the Hessian matrix needs a lot of storage and calculation efort. Hence the BFGS algorithm is used to derive the approximate form of the Hessian matrix in an iterative manner in (30), where…”

Section: Multiparameter Coordinated Optimization Considering the Opti...mentioning

confidence: 99%

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Suppression to Angular Oscillation among Synchronous Generators by Optimizing Parameters and Set-Points of Synchronous Condenser and High-Voltage DC

Tao

et al. 2022

International Transactions on Electrical Energy Systems

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After losing one or two poles of the high-voltage DC (HVDC) line, power systems may experience angular oscillations among the synchronous generators (SGs), possibly followed by tripping of the SGs and blackouts of the loads. To suppress the oscillations, the difficulty lies in the optimization methods and the countermeasures. For the former, parameter optimization based on the eigen-analysis for a given scenario is not suitable for angular oscillation after a large disturbance lasting for several seconds or longer. For the latter, adjusting the active power of the SGs is effective but responds slowly. Adjusting the excitation system of the synchronous condensers (SCs) is seldom studied since the relation of the power angle with the reactive power is not clearly described. Adjusting the control parameters of the remaining HVDC has limited effect and is not enough. The set-points for the controller of the HVDC are adjusted to suppress the oscillation but are to be restored after the oscillation, which is different from optimization of the control parameters. In this paper, coordinated optimization of the control parameters and the set-points of the SC and the HVDC is proposed to suppress the angular oscillations among the SGs. At first, the relation of the reactive power of the SC with the power angles is validated to provide the basis for optimizing the control parameters and the set-points of the SC. Since the analytical expression between the power angle and the control parameters or the set-points related to the reactive power is not explicit and the optimization periods of different parameters are different, an improved analytical model of the trajectory sensitivity (TS) is proposed. Based on the indication indices, the control parameters and the set-points of the constant current controller and the excitation system to be optimized are decided. The gradients of the objective function are extended to derive a coordinated multiparameter optimization model to suppress the angular oscillation among the SGs. The numerical results validate the accuracy of the improved TS by comparing it with the perturbation method. The time-domain analysis in different scenarios shows that the angular oscillations in the AC/HVDC system are effectively suppressed with the proposed optimization model.

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Section: Multiparameter Coordinated Optimization Considering the Opti...mentioning

confidence: 99%

“…In [28], the control parameters of the DFIG are optimized with the PSO and the trajectory sensitivity. It may be derived by the perturbation method or the analytical method [29,30]. Te former is simpler but requires more calculations.…”

Section: Introductionmentioning

confidence: 99%

Suppression to Angular Oscillation among Synchronous Generators by Optimizing Parameters and Set-Points of Synchronous Condenser and High-Voltage DC

Tao

et al. 2022

International Transactions on Electrical Energy Systems

View full text Add to dashboard Cite

show abstract

Optimization to controllability measure of the POD in DFIG-integrated power systems to improve small-signal stability margin considering the impact of pre-fault slip

Li,

Tao

2024

Electr Eng

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Robust Stability of Grid-Connected Voltage Source Converter with Phase-Locked Loop

Zhang

2023

IEEE Trans. Power Syst.

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Critical Clearing Time Sensitivity for Differential-Algebraic Power System Model

Cited by 4 publications

References 17 publications

Suppression to Angular Oscillation among Synchronous Generators by Optimizing Parameters and Set-Points of Synchronous Condenser and High-Voltage DC

Suppression to Angular Oscillation among Synchronous Generators by Optimizing Parameters and Set-Points of Synchronous Condenser and High-Voltage DC

Optimization to controllability measure of the POD in DFIG-integrated power systems to improve small-signal stability margin considering the impact of pre-fault slip

Robust Stability of Grid-Connected Voltage Source Converter with Phase-Locked Loop

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