Results 1 to 10 of about 114,627 (294)
The study on the Mal-operation of the transformer current differential protection during external faults cause by CT saturation [PDF]
E3S Web of Conferences, 2021 This paper analyses the unusual mal-operation of the differential protection for transformer current differential protection during the external fault. The mal-operation reason is researched in detail, based on the mathematical analysis, the simulation ...
Wu Jianhong +5 more
doaj +2 more sources
Energies, 2020 This study proposes three-phase saturation identification using X-ray computerized tomography (CT) images of gas hydrate (GH) experiments considering critical GH saturation (SGH,C) based on the machine-learning method of random forest.
Sungil Kim +3 more
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Fast Detection of Current Transformer Saturation Using Stacked Denoising Autoencoders
Energies, 2023 Malfunctions in relay protection devices are predominantly caused by current transformer (CT) saturation which produces distortion in current measurements and disturbances in power system protection.
Sopheap Key +3 more
doaj +2 more sources
Current transformer (CT) saturation classification using empirical mode decomposition (EMD) and relevance vector machine (RVM) [PDF]
Scientific ReportsThe fault is taking place in the power system where the saturation of the Current Transformer (CT) is occurring, among other variations of system parameters.
Nilesh Chothani +3 more
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Extra‐sensitive impedance differential protection immune to CT saturation
IET Generation, Transmission & Distribution, 2020 For extra‐high voltage transmission lines configured with a communication channel, the current differential protection is facing a dilemma between sensitivity and security. On the one hand, the resistive coverage will not be sufficiently high if security
Ning Tong +6 more
doaj +2 more sources
Zhongguo dianli, 2023 To solve the problem of relay protection caused by CT saturation, a CT saturation identification method is proposed based on flux density characteristics and secondary current reconstruction technology in the distortion area.
Feng WANG +5 more
doaj +1 more source
Substation protection method for missing measurement information of transformer and bus connecting line [PDF]
E3S Web of Conferences, 2021 In order to solve the problems of protection misoperation and refusing to operate caused by the lack of measurement information in smart substation, a substation protection method which can effectively eliminate the influence of transformer inrush ...
Liu Wei +8 more
doaj +1 more source
The Egyptian Journal of Radiology and Nuclear Medicine, 2022 Background COVID-19 pneumonia is responsible for the latest pandemics. Chest computed tomography (CT) scan is known to be an essential tool for diagnosis of COVID-19.
Ahmed Gamil Ibrahim Abd El Megid +2 more
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Clinical and radiological imaging as prognostic predictors in COVID-19 patients
The Egyptian Journal of Radiology and Nuclear Medicine, 2021 Background Since the announcement of COVID-19 as a pandemic infection, several studies have been performed to discuss the clinical picture, laboratory finding, and imaging features of this disease.
Maha Ibrahim Metwally +10 more
doaj +1 more source
Waveform dissimilarity factor-based protection for main transformers in wind farms
Energy Reports, 2023 Current differential protection (CDP) is widely used as main protection for transformers due to its high reliability and selectivity. Owing to non-fundamental frequency current, magnetizing inrush and current transformer (CT) saturation, CDP may undergo ...
Yingyu Liang +3 more
doaj +1 more source