Results 21 to 30 of about 143,487 (265)

Thermal Aging Characteristics of Newly Synthesized Triester Insulation Oil

IEEE Access, 2019
High-stability triester insulation oil derived from the trimethylolpropane esters (TME) was synthesized by esterifying saturated fatty acids and trimethylolpropane (TMP). The TME oil shows higher AC breakdown voltage (Vb, 72.6 kV/2.5 mm) than that of FR3
Kaizheng Wang, Feipeng Wang, Qi Zhao, Jian Li, Ziyi Lou, Qiuhuang Han, Kelin Hu   +6 more
doaj   +1 more source

A Novel Method to Directly Analyze Dissolved Acetic Acid in Transformer Oil without Extraction Using Raman Spectroscopy

Energies, 2017
Analyzing the concentration of low molecular acids dissolved in oil is vital in the oil-paper insulation aging diagnostic procedure of power transformers. The existing methods cannot distinguish between different acid types and their strengths.
Fu Wan, Lingling Du, Weigen Chen, Pinyi Wang, Jianxin Wang, Haiyang Shi   +5 more
doaj   +1 more source

Partial discharge characteristics of an air gap defect in the epoxy resin of a saturable reactor under an exponential decay pulse voltage

High Voltage, 2020
Saturable reactor insulation is currently stressed by an exponential decay pulse voltage under normal operating conditions. The partial discharge (PD) characteristics of epoxy resin under an exponential decay pulse voltage were studied here and were ...
Lu Gui, Yan Mi, Shengchu Deng, Lulu Liu, Xin Ge, Wenmin Ouyang   +5 more
doaj   +1 more source

Oil‐paper insulation partial discharge ultrasonic multifrequency sensing array based on fibre‐optic Fabry–Perot sensor

High Voltage, 2022
In order to improve the sensitivity and accuracy of oil‐paper insulation partial discharge detection by the fibre‐optic Fabry–Perot (FP) ultrasonic sensor, this work studied the ultrasonic signal’s frequency characteristics of typical oil‐paper ...
Zhixian Zhang, Jiali Lei, Weigen Chen, Tianhe Yang, Yuxuan Song, Kejie Wu, Fan Liu   +6 more
doaj   +1 more source

Model and Data Hybrid Driven Approach for Quantifying the Meteorology-Dependent Demand Flexibility of Building Thermal Loads

CSEE Journal of Power and Energy Systems
Recently, the heat and electricity integrated energy system (HE-IES) has become a hot topic in both industry and academia. In the HE- IES, the potential flexibility of the buildings' thermal loads can be exploited to relax the heat power balance ...
Bo Hu, Xin Cheng, Changzheng Shao, Tao Niu, Chunyan Li, Yue Sun, Wei Huang, Kaigui Xie   +7 more
doaj   +1 more source

AC flashover performance of different shed configurations of composite insulators under fan-shaped non-uniform pollution

High Voltage, 2018
Currently, it is founded that under unidirectional wind and certain landform, composite insulators are always fan-shaped non-uniformly polluted. In this paper, artificial pollution tests on three types of composite insulators with different shed ...
Zhijin Zhang, Xinhan Qiao, Yi Zhang, Liang Tian, Dongdong Zhang, Xingliang Jiang   +5 more
doaj   +1 more source

A Data Mining Approach for Transformer Failure Rate Modeling Based on Daily Oil Chromatographic Data

IEEE Access, 2020
Evaluating the real-time failure rate of transformers can effectively guide the planning of maintenance and reduce their failure risk. This paper proposed a novel transformer failure rate model that considers the impact of maintenance based on daily oil ...
Wei Huang, Xuan Li, Bo Hu, Jiahao Yan, Lvbing Peng, Yue Sun, Xin Cheng, Jinfeng Ding, Kaigui Xie, Qinglong Liao, Lingyun Wan   +10 more
doaj   +1 more source

Development and Implementation of a Disease‐Targeted Storybook as a Clinical Tool for Children With Acute Leukemia

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Although significant progress has been made in childhood leukemia survival, healthcare providers, and caregivers often face challenges in explaining this disease to patients. Disease‐targeted storybooks have been proposed as a tool to facilitate the understanding of diagnoses and treatment.
Nutvipha Ummartyotin, Usanarat Anurathapan, Rawiwan Roongpraiwan, Potchanee Dandamrongrak, Siriporn Nakhonchai, Pawin Numthavaj, Vilawan Chirdkiatgumchai   +6 more
wiley   +1 more source

From distributed tracing to proactive SLO management: a mini-review of trace-driven performance prediction for cloud-native microservices

Frontiers in Computer Science
Cloud-native microservices improve development velocity and elasticity, but they also create complex and dynamic service dependencies. Resource contention, queue buildup, and downstream slowdowns can propagate through call chains, amplifying end-to-end ...
Miaopeng Yu, Miaopeng Yu, Haonan Liu, Haonan Liu, Jinran Du, Jinran Du, Kequan Lin, Tao Dai, Tao Dai, Yanzhe Fu, Yanzhe Fu, Chunyan Yang, Chunyan Yang   +12 more
doaj   +1 more source

Measurement of Line-to-Ground Capacitance in Distribution Network Considering Magnetizing Impedance’s Frequency Characteristic

Energies, 2017
Signal injection method (SIM) is widely applied to the insulation parameters’ measurement in distribution network for its convenience and safety. It can be divided into two kinds of patterns: injecting a specific frequency signal or several frequencies ...
Qing Yang, Bo Zhang, Jiaquan Ran, Song Chen, Yanxiao He, Jian Sun   +5 more
doaj   +1 more source