An Extended Continuation Power Flow Method for Static Voltage Stability Assessment of Renewable Power Generation-Penetrated Power Systems

Wang, Tiezhu; Wang, Shanshan; Ma, Shicong; Guo, Jianbo; Zhou, Xiaoxin

doi:10.1109/tcsii.2022.3209335

Cited by 13 publications

(5 citation statements)

References 17 publications

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“…where Z could be volatile renewables (e.g., wind speed), load variations, etc. The system response Y is also a random variable (e.g., voltage variation in [5], [13], [14], probabilistic total transfer capability (PTTC) in [15], [16]). Covariance-based sensitivity indices can be utilized arXiv:2307.07080v1 [eess.SP] 13 Jul 2023 to quantify how the variation in Zj affects the variance of the system response Y .…”

Section: The Polynomial Chaos Expansion-based Global Sensitivity Anal...mentioning

confidence: 99%

A Comparative Study of Polynomial Chaos Expansion-Based Methods for Global Sensitivity Analysis in Power System Uncertainty Control

Wang¹,

Liu²,

Wang³

et al. 2024

IEEE Trans. Circuits Syst. II

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In this letter, we compare three polynomial chaos expansion (PCE)-based methods for ANCOVA (ANalysis of CO-VAriance) indices based global sensitivity analysis for correlated random inputs in two power system applications. Surprisingly, the PCE-based models built with independent inputs after decorrelation may not give the most accurate ANCOVA indices, though this approach seems to be the most correct one and was applied in [1] in the field of civil engineering. In contrast, the PCE model built using correlated random inputs directly yields the most accurate ANCOVA indices for global sensitivity analysis. Analysis and discussions about the errors of different PCE-based models will also be presented. These results provide important guidance for uncertainty management and control in power system operation and security assessment.

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Section: The Polynomial Chaos Expansion-based Global Sensitivity Anal...mentioning

confidence: 99%

A Comparative Study of Polynomial Chaos Expansion-Based Methods for Global Sensitivity Analysis in Power System Uncertainty Control

Wang¹,

Liu²,

Wang³

et al. 2024

IEEE Trans. Circuits Syst. II

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“…Simulation results from [3] demonstrate that the proposed extended CPF method exhibits greater accuracy than conventional CPF when assessing the static voltage stability of power systems with a high penetration of renewable power generation (RPG). Additionally, [20] reveals that the voltage support capability of each node increases as the proportion coefficient rises.…”

Section: Introductionmentioning

confidence: 98%

“…In [20], the Continuation Power Flow method (CPF) has been widely applied to determine static voltage stability limits in power systems, offering valuable insights for ensuring stable operations. Simulation results from [3] demonstrate that the proposed extended CPF method exhibits greater accuracy than conventional CPF when assessing the static voltage stability of power systems with a high penetration of renewable power generation (RPG).…”

Section: Introductionmentioning

confidence: 99%

Development of an algorithm for compressing the information content of the results of the continuation power flow analysis

BISLIMI

2023

Preprint

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In this work, we have developed an algorithm to compress the information content derived from the Continuation Power Flow (CPF) analysis. We utilized MATLAB as the computational tool, which made it possible to display the results graphically in a simple manner. This paper presents a schematic representation of the developed algorithm, followed by a step-by-step explanation using a theoretical and practical example based on the algorithm's schematics. We employed synthetic high-voltage grids ranging from 2 to 17 nodes as test systems. Future work will focus on the development of software that can be applied to any network. Our investigations have revealed several advantages of CPF. It enables the analysis of system behavior in both stable and unstable regions, providing precise information about the load level at which voltage collapse occurs. This accuracy is contingent on a consensus that voltage collapse can be described using a stationary approach. Additionally, CPF analysis results, particularly the PV curves, are easily interpretable with appropriate graphical processing. We present the results of voltage stability analyses, graphically displaying voltage magnitudes and angles as they vary with the load for networks of different sizes, ranging from 2 to 17 nodes, calculated using CPF.

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“…Results similar to those desired were obtained by the network. Methods aimed at reducing computational time have also been applied to improve electrical systems [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Post-Contingency Loading Margin through Plane Change in the Continuation Power Flow

dos Santos,

Bonini Neto,

Gabriel Filho

2023

Energies

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This paper introduces a parameterization technique to obtain complete P-V curves for electrical power systems under various conditions, including contingencies (N-1, N-1 severe, and N-2) as well as normal operating conditions N-0 (pre-contingency). The distinct feature of this methodology lies in the utilization of the new (θk, Vk) plane for constructing the P-V curve. In this new framework, the solution trajectory exhibits a linear characteristic in the vicinity of the maximum loading point (MLP), effectively mitigating any numerical challenges. Another crucial aspect is the point denoted as the center of the set of lines, point O (λ0, Vk0). This point can be adjusted along the ordinate axis, further enhancing the method’s ability to achieve a smoother ‘flat start’. The ‘flat start’ approach employed in the proposed methodology enables the determination of the loading margin for any system subjected to both simple and severe contingencies. Additionally, it facilitates the use of larger steps in acquiring complete P-V curves with a reduced number of iterations. A procedure presented is to not update the Jacobian matrix at each iteration but only when the system undergoes significant changes. This technique reduced the CPU Ratio by 29.74% in obtaining the P-V curve for all scenarios.

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An Extended Continuation Power Flow Method for Static Voltage Stability Assessment of Renewable Power Generation-Penetrated Power Systems

Cited by 13 publications

References 17 publications

A Comparative Study of Polynomial Chaos Expansion-Based Methods for Global Sensitivity Analysis in Power System Uncertainty Control

A Comparative Study of Polynomial Chaos Expansion-Based Methods for Global Sensitivity Analysis in Power System Uncertainty Control

Development of an algorithm for compressing the information content of the results of the continuation power flow analysis

Post-Contingency Loading Margin through Plane Change in the Continuation Power Flow

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