Surrogate Model for Torsional Behavior of Bundle Conductors and its Application

Huang, Guizao; Yan, Bo; Mou, Zheyue; Wu, Kaiwen; Lv, Xin

doi:10.1109/tpwrd.2021.3053341

Cited by 11 publications

(2 citation statements)

References 20 publications

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“…We chose a well-known object-based approach and used the three pixel-based classifiers imbedded in the ENVI 5.3 software. Specifically, for the object-based and three pixel-based classifiers, we used four models, including feature extraction rule based (FERB) [90,91], random forest (RF) [92,93], backpropagation neural net (BPNN) [94,95], and support vector machine (SVM) [96,97], that are well-known for their good performance. We manually selected 30% of the clipped image as training samples for RF, BPNN, and SVM, and used the rest as test samples.…”

Section: Modified Pixel Swapping Algorithm (Mpsa)mentioning

confidence: 99%

Development of a Novel Burned-Area Subpixel Mapping (BASM) Workflow for Fire Scar Detection at Subpixel Level

Gui

Zhou

et al. 2022

Remote Sensing

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The accurate detection of burned forest area is essential for post-fire management and assessment, and for quantifying carbon budgets. Therefore, it is imperative to map burned areas accurately. Currently, there are few burned-area products around the world. Researchers have mapped burned areas directly at the pixel level that is usually a mixture of burned area and other land cover types. In order to improve the burned area mapping at subpixel level, we proposed a Burned Area Subpixel Mapping (BASM) workflow to map burned areas at the subpixel level. We then applied the workflow to Sentinel 2 data sets to obtain burned area mapping at subpixel level. In this study, the information of true fire scar was provided by the Department of Emergency Management of Hunan Province, China. To validate the accuracy of the BASM workflow for detecting burned areas at the subpixel level, we applied the workflow to the Sentinel 2 image data and then compared the detected burned area at subpixel level with in situ measurements at fifteen fire-scar reference sites located in Hunan Province, China. Results show the proposed method generated successfully burned area at the subpixel level. The methods, especially the BASM-Feature Extraction Rule Based (BASM-FERB) method, could minimize misclassification and effects due to noise more effectively compared with the BASM-Random Forest (BASM-RF), BASM-Backpropagation Neural Net (BASM-BPNN), BASM-Support Vector Machine (BASM-SVM), and BASM-notra methods. We conducted a comparison study among BASM-FERB, BASM-RF, BASM-BPNN, BASM-SVM, and BASM-notra using five accuracy evaluation indices, i.e., overall accuracy (OA), user’s accuracy (UA), producer’s accuracy (PA), intersection over union (IoU), and Kappa coefficient (Kappa). The detection accuracy of burned area at the subpixel level by BASM-FERB’s OA, UA, IoU, and Kappa is 98.11%, 81.72%, 74.32%, and 83.98%, respectively, better than BASM-RF’s, BASM-BPNN’s, BASM-SVM’s, and BASM-notra’s, even though BASM-RF’s and BASM-notra’s average PA is higher than BASM-FERB’s, with 89.97%, 91.36%, and 89.52%, respectively. We conclude that the newly proposed BASM workflow can map burned areas at the subpixel level, providing greater accuracy in regards to the burned area for post-forest fire management and assessment.

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Section: Modified Pixel Swapping Algorithm (Mpsa)mentioning

confidence: 99%

Development of a Novel Burned-Area Subpixel Mapping (BASM) Workflow for Fire Scar Detection at Subpixel Level

Gui

Zhou

et al. 2022

Remote Sensing

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“…As an important section of the transmission lines, isolated-span transmission lines are widely adopted to connect two tension towers at some complex terrain zones, such as crossing high mountains, broad rivers, large-scale facilities etc. Ice disasters threaten the normal operation of the grid [2][3][4][5]. Ice accumulating on conductors drops down in the case of rising temperature or wind excitation, called ice-shedding.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on dynamic response characteristics of isolated‐span transmission lines after ice‐shedding

et al. 2022

Self Cite

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The dynamic response characteristics, including maximum jump height and unbalanced tension, of isolated‐span transmission lines after ice‐shedding are investigated by means of experiments. A reduced‐scale modelling method for ice‐shedding from conductor lines is presented and verified with numerical simulations and full‐scale test results in the literature. A parameter study on dynamic responses of isolated‐span conductors under three ice‐shedding scenarios, including whole span ice‐shedding, partial ice‐shedding and unzipping ice‐shedding, is carried out by means of reduced‐scale modelling tests. The effects of these parameters on the maximum jump height at typical positions and unbalanced tension in the tension tower are obtained. It is observed that the partial ice‐shedding scenario may be the worst situation for electrical insulation clearance rather than the whole span ice‐shedding scenario. Moreover, the position of maximum jump height along the span of isolated‐span transmission lines after ice‐shedding could be at around 2/5 of span length, which is different from the conventional opinion that the position is at the midpoint. The results may provide a foundation for the defining of the insulation clearance for an isolated‐span transmission line and the structure design of tension tower arms in an iced zone.

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Development of surrogate models for evaluating energy transfer quality of high-speed railway pantograph-catenary system using physics-based model and machine learning

Huang

Yang

et al. 2023

Applied Energy

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Surrogate Model for Torsional Behavior of Bundle Conductors and its Application

Cited by 11 publications

References 20 publications

Development of a Novel Burned-Area Subpixel Mapping (BASM) Workflow for Fire Scar Detection at Subpixel Level

Development of a Novel Burned-Area Subpixel Mapping (BASM) Workflow for Fire Scar Detection at Subpixel Level

Experimental study on dynamic response characteristics of isolated‐span transmission lines after ice‐shedding

Development of surrogate models for evaluating energy transfer quality of high-speed railway pantograph-catenary system using physics-based model and machine learning

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