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Power System Security Assessment and Risk Analysis

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Electrical, Electronics and Communications Engineering".

Deadline for manuscript submissions: closed (20 January 2026) | Viewed by 1018

Special Issue Editors


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Guest Editor
Department of Electrical and Electronic Engineering, The Hong Kong Polytechnic University, Hong Kong SAR 999077, China
Interests: power system operation and planning; power system security; risk assessment
Department of Electrical and Electronic Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
Interests: power system stability, operation, and economics considering renewable energy integration; smart grid application; transport electrification
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Special Issue Information

Dear Colleagues,

Modern power systems face increasing security challenges as they adapt to rapidly changing technological, environmental, and regulatory landscapes. As power grids become increasingly complex with the integration of renewable energy sources, distributed generation, and advanced communication technologies, ensuring their security and reliability has become significant. This Special Issue seeks to explore innovative methodologies and tools for assessing security and analyzing risks within these dynamic systems and also promotes the development of robust strategies to mitigate potential threats and vulnerabilities that could disrupt power supply and compromise grid stability. By bringing together cutting-edge research and practical insights, this Special Issue aims to advance the understanding of how evolving factors—such as climate change, new technologies, cyber threats, and policy shifts—impact power system security. This Special Issue will help guide industry professionals, researchers, and policymakers in enhancing the resilience and reliability of power systems, ultimately contributing to a more secure and sustainable energy future.

Dr. Qin Wang
Dr. Siqi Bu
Guest Editors

Manuscript Submission Information

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Keywords

  • power system security
  • risk analysis
  • grid stability
  • renewable integration
  • cyber threats

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Published Papers (2 papers)

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Research

28 pages, 2703 KB  
Article
Generalized Dynamic Security Region of Grid-Following and Grid-Forming Converter-Based Systems by Basin of Attraction Method
by Rui Ma, Yan Cheng, Shibo Wang, Shumin Sun and Wei Cong
Appl. Sci. 2026, 16(4), 2130; https://doi.org/10.3390/app16042130 - 22 Feb 2026
Viewed by 285
Abstract
With renewable integration and zero-carbon microgrids achieving 100% penetration, converter-dominated systems exhibit millisecond-timescale transient synchronization, which challenges existing physical cognitive methods and cognitive methodology with the synchronous generator (SG). In this paper, in order to quantificationally analyze the transient synchronization, a unified framework [...] Read more.
With renewable integration and zero-carbon microgrids achieving 100% penetration, converter-dominated systems exhibit millisecond-timescale transient synchronization, which challenges existing physical cognitive methods and cognitive methodology with the synchronous generator (SG). In this paper, in order to quantificationally analyze the transient synchronization, a unified framework has been proposed that combines the generalized participation factor (GPF) method and basin of attraction (BOA) boundary analysis using the manifold approach. According to the GPF and BOA analyses, the fourth-order models are essential for accurate stability quantification, with synchronization controls (PLL, VSG, and droop control) contributing greater than 70% to transient dynamics versus about 20% from power-balance interactions. Further, the dynamic security region (DSR) is redefined by two typologies. Type 1 DSR maps stability in active-power injection space, and Type 2 DSR (generalized DSR) delineates limits in the controllable parameter space. The estimation procedures are proposed for these two types of DSRs by the BOA method. Finally, electromagnetic transient simulations and critical clearing time validation are employed for fidelity verification of models and estimation approaches. To sum up, the proposed novel framework enables systematic DSR estimations for renewable-rich power systems, empowering grid operators to optimize converter-controllable parameters and system operation conditions. Full article
(This article belongs to the Special Issue Power System Security Assessment and Risk Analysis)
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18 pages, 3356 KB  
Article
Response of Transmission Tower Guy Wires Under Impact: Theoretical Analysis and Finite Element Simulation
by Jin-Gang Yang, Shuai Li, Chen-Guang Zhou, Liu-Yi Li, Bang Tian, Wen-Gang Yang and Shi-Hui Zhang
Appl. Sci. 2026, 16(1), 123; https://doi.org/10.3390/app16010123 - 22 Dec 2025
Viewed by 389
Abstract
Transmission tower guy wires are critical flexible tension members ensuring the stability and safe operation of overhead power transmission networks. However, these components are vulnerable to external impacts from falling rocks, ice masses, and other natural hazards, which can cause excessive deformation, anchorage [...] Read more.
Transmission tower guy wires are critical flexible tension members ensuring the stability and safe operation of overhead power transmission networks. However, these components are vulnerable to external impacts from falling rocks, ice masses, and other natural hazards, which can cause excessive deformation, anchorage loosening, and catastrophic failure. Current design standards primarily consider static loads, lacking comprehensive models for predicting dynamic impact responses. This study presents a theoretical model for predicting the peak impact response of guy wires by modeling the impact process as a point mass impacting a nonlinear spring system. Using an energy-based elastic potential method combined with cable theory, analytical solutions for axial force, displacement, and peak impact force are derived. Newton–Cotes numerical integration solves the implicit function to obtain closed-form solutions for efficient prediction. Validated through finite element simulations, deviations of peak displacement, peak impact force, and peak axial force between theoretical and numerical results are within ±4%, ±18%, and ±4%, respectively. Using the validated model, parametric studies show that increasing the inclination angle from 15° to 55° slightly reduces peak displacement by 2–4%, impact force by 1–13%, and axial force by 1–10%. Higher prestress (100–300 MPa) decreases displacement and impact force but increases axial force. Longer lengths (15–55 m) cause linear displacement growth and nonlinear force reduction. Impacts near anchorage points help control displacement risks, and impact velocity generally has a more significant influence on response characteristics than impactor mass. This model provides a scientific basis for impact-resistant design of power grid infrastructure and guidance for optimizing de-icing strategies, enhancing transmission system safety and reliability. Full article
(This article belongs to the Special Issue Power System Security Assessment and Risk Analysis)
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