Coupling effects of power substation equipment with multiple configurations

Xie, Qiang; Wen, Jiayi; Liu, Weichen

doi:10.1016/j.soildyn.2021.106908

Cited by 5 publications

(7 citation statements)

References 24 publications

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“…Therefore, further data and analysis of the experiment of the disconnector is not provided. The referenced experiment, 21 conducted for engineering qualification purposes, obtained limited test data. A main limitation is that high‐seismic‐level tests beyond the linear stage of the equipment were not conducted.…”

Section: Copula‐based Assessment Framework and Adopted Methodsmentioning

confidence: 99%

“…For the closed state, a detailed analysis of the coupling effect between the blade and the fixed contacts has been provided in a previous publication. 21 It was revealed that in the upward Y-direction, there is no stable connection between the blade and the fixed contacts, and they are in simple contact. Hence, the connection surface between them can be simulated using contact pairs in the model.…”

Section: Experiment-assisted Established Model Of Typical Switchgear ...mentioning

confidence: 99%

“…During the closed state, the disconnector was subjected to X-direction PGA levels scaled to both 0.15 and 0.3 g. As the open state is secondary and only occurs during overhauls, the PGA for the open state was set to 0.2 g. A more detailed description of the test and its analysis of the test results has been published in a previous experimental study by the authors, which can be referred to. 21 In this paper, the test results are primarily utilized to guide the establishment of the simulation model as shown in Figure 6, when the disconnector is in service state, that is, the blade is closed. The steel frame is simulated using beam elements, while the insulators, blade, and fixed contacts are modelled using solid elements.…”

Section: Experiment-assisted Established Model Of Typical Switchgear ...mentioning

confidence: 99%

“…First, when the switchable blade is in the closed position, it is subject to contact constraints with the connection components, which is unsuitable to be modeled by conventional connections like hinges or fixed joints. 21 Developing appropriate theoretical models to simulate this contact constraint is difficult, and studies relying on experiments and sophisticated finite element simulations may be the most feasible manner at present. Second, the current research primarily focuses on the coupling effect of the blade on equipment posts, paying less attention to the probable failure mode of the blade itself.…”

Section: Introductionmentioning

confidence: 99%

“…However, there are two main limitations in current research. First, when the switchable blade is in the closed position, it is subject to contact constraints with the connection components, which is unsuitable to be modeled by conventional connections like hinges or fixed joints 21 . Developing appropriate theoretical models to simulate this contact constraint is difficult, and studies relying on experiments and sophisticated finite element simulations may be the most feasible manner at present.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Improved seismic risk evaluation for high‐voltage switchgear equipment: A copula‐based framework considering joint failure modes

Wen,

Li,

Zhu

2023

Earthq Engng Struct Dyn

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Traditional seismic evaluations for high‐voltage switchgear equipment, the critical power facilities, consider only structural failure mode and may underestimate the actual seismic risk. By additionally introducing a probable functional failure mode caused by the excessive deformation of the switchable blade of equipment, a novel copula‐based framework is proposed to utilize limited samples to generate simulation data and evaluate the joint failure probability (JFP). The correlation index and Akaike Information Criterion are employed to optimize the Copula function. For illustration, a disconnector, representative switchgear equipment, was selected as an example and modeled with the experiment validation. Model analysis results demonstrate the Clayton type is the most competent for evaluation. Neglecting functional failure can significantly underestimate the actual failure probability at various seismic intensities, up to 50%. Furthermore, it was found that the current equipment material strength level already meets the requirements, and enhancing strength alone does not effectively improve reliability under strong earthquakes. For PGA intensities ≥0.7 g, the blade deformation capacity plays the primary reliability constraint, independent of material stress. A cost‐effective seismic design should optimize the combination of allowable material stress and blade deformation based on the JFP considering seismic intensity and targeted reliability.

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Section: Copula‐based Assessment Framework and Adopted Methodsmentioning

confidence: 99%

Section: Experiment-assisted Established Model Of Typical Switchgear ...mentioning

confidence: 99%

Section: Experiment-assisted Established Model Of Typical Switchgear ...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Improved seismic risk evaluation for high‐voltage switchgear equipment: A copula‐based framework considering joint failure modes

Wen,

Li,

Zhu

2023

Earthq Engng Struct Dyn

Self Cite

View full text Add to dashboard Cite

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Seismic vulnerability assessment of electrical substation system based on the hybrid fragility functions and Bayesian network

Fu,

Guo,

et al. 2024

Earthq Engng Struct Dyn

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Substations function as neural hubs within power systems and play pivotal roles in the aggregation, transformation, and distribution of electrical energy. Previous experiences indicate that substation systems are highly susceptible to damage under earthquakes, resulting in a subsequent decrease in power supply functionality. To mitigate the risk of earthquake‐induced damage, a novel approach based on Bayesian theory is proposed to assess the seismic vulnerability of complex engineering systems. The proposed method initially obtains the prior distribution of seismic fragility parameters for electrical equipment through numerical simulations of coupled finite element models. Subsequently, seismic damage survey data and Bayesian updating rules are applied to update the prior probability, obtaining a hybrid fragility function for electrical equipment. The Bayesian network was constructed using logical relations among internal electrical components in the substation, aiming to quantify the seismic vulnerability of the system across different functionality indicators. Finally, the causal inference technique was employed to quantify the importance of various components and equipment. A realistic case study on a typical 220/110/35 kV substation system was performed using the proposed method. The results demonstrate that the method improves the confidence level of the equipment fragility curves, reduces the computational workload of the system vulnerability analysis, and provides a theoretical basis for improving substation performance and formulating post‐disaster maintenance plans.

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Experiment and Finite-Element Analysis on Seismic Response of Y-Shaped Porcelain Column Circuit Breaker Equipped with SMA Cables

et al. 2022

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Coupling effects of power substation equipment with multiple configurations

Cited by 5 publications

References 24 publications

Improved seismic risk evaluation for high‐voltage switchgear equipment: A copula‐based framework considering joint failure modes

Improved seismic risk evaluation for high‐voltage switchgear equipment: A copula‐based framework considering joint failure modes

Seismic vulnerability assessment of electrical substation system based on the hybrid fragility functions and Bayesian network

Experiment and Finite-Element Analysis on Seismic Response of Y-Shaped Porcelain Column Circuit Breaker Equipped with SMA Cables

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