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Recycling of Silicone Rubber from Composite Insulator with Pyrolysis Method

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CSEE Journal of Power and Energy Systems 2024年第4期10卷 1787-1798页

作者： Ruiqi Shang Liming Wang Fanghui Yin masoud farzaneh Institute of Advanced Technologies in Energy and Electrical Engineering(IAT3E) Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China Department of Applied Sciences(DSA) University of Quebec at ChicoutimiChicoutimiQC G7H2B1Canada

Composite insulators have been widely used in transmission *** being removed from transmission lines,their housing silicone material cannot degrade *** tackle this problem,this paper proposes an effective method to recycle waste insulators by pyrolysis to obtain mullite(3Al_(2)O_(3)·2SiO_(2))with high purity and compact *** recycling process studied will not generate toxic *** thermal degradation process of housing material is investigated by analyzing its degradation products including the gas and residues in *** experimental results indicate that the colorant agent Fe2O3 inside the housing material is beneficial for the generation of mullite by decreasing the temperature of ***,since the transitional alumina generated by the dehydration of aluminum hydroxide(ATH)has a smaller diameter and can better dissolute into the silica phases,ATH is a better choice as the additional aluminum *** comparing the components,structure,and particle size of grains formed at different calcination temperatures,the proposed pyrolysis temperatures of the two stages are 1400◦C and 1600◦C,respectively.

关键词： Composite insulator mullite pyrolysis recycling silicone rubber sintering

覆冰绝缘子直流电弧运动特性及燃弧时间的影响因素

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高电压技术 2024年第9期50卷 4222-4231页

作者：刘勇李超辛岳芃尹芳辉杜伯学 masoud farzaneh 天津大学电气自动化与信息工程学院天津300072 清华大学深圳国际研究生院深圳518055 魁北克大学席库提米分校加拿大QC G7H2B1

为提高覆冰绝缘子闪络风险预测技术,分析了高压悬式覆冰绝缘子直流电弧运动特性及影响燃弧时间的因素。对直流覆冰闪络试验各阶段的泄漏电流和电弧动态特性进行了协同分析,深入研究了正、负直流电压下电弧动态行为差异。分析了燃弧时间... 详细信息

为提高覆冰绝缘子闪络风险预测技术,分析了高压悬式覆冰绝缘子直流电弧运动特性及影响燃弧时间的因素。对直流覆冰闪络试验各阶段的泄漏电流和电弧动态特性进行了协同分析,深入研究了正、负直流电压下电弧动态行为差异。分析了燃弧时间与电弧特征量、泄漏电流的相关性,并建立了针对燃弧时间的多元拟合模型。结果表明:泄漏电流和电弧长度的变化可有效区分电弧发展阶段,其中负直流电压下的电弧产生频繁,初始局部电弧分布密集,持续时间短。直流电弧延伸时产生的新放电路径导致接触型和非接触型2种电弧衰减方式,且不同极性电压下新放电路径的发展方向相反。此外,直流电弧持续期间的累积电荷量、长度平均值与燃弧时间显著正相关,且负直流电弧长度平均值的数据离散度与电荷累积量分布范围更低,建立的多变量拟合方程对电弧持续时间的预测精度更高。

关键词：覆冰绝缘子直流电弧运动机理泄漏电流燃弧时间

Electrical characteristics of an energised conductor under various weather conditions

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High Voltage 2017年第2期2卷 102-109页

作者： Fanghui Yin masoud farzaneh Xingliang Jiang Canada Research Chair on Atmospheric Icing Engineering of Power Networks(INGIVRE) Universitédu QuébecàChicoutimi(UQAC)555 Boulevard de l'UniversitéChicoutimiQC G7H 2B1Canada State Key Laboratory of Power Transmission Equipment&System Security and New Technology College of Electrical EngineeringChongqing UniversityChongqing 400044People's Republic of China

When a transmission line is subjected to adverse weather conditions,rain drops or ice can be formed on its surface,leading to discharge phenomena known as *** corona discharge increases corona loss,leakage conductance,and capacitance,the latter two effects facilitating harmonic conditions and power quality *** study investigates the electrical characteristics of an energised conductor under rain,rime,and glaze ice *** experiments were carried out in a climate room using a corona *** was found that the leakage conductance of a corona-cage configuration was at its highest under glaze ice condition and at its lowest under rime condition for the same background surface electric *** the presence of icicles,the change in capacitance under glaze ice accretion was *** the experimental results,it can be concluded that the corona-cage configuration is mainly characterised by its capacitive nature before the corona *** the corona discharge occurs,the corona cage exhibits a resistive–capacitive *** the increase of applied voltage,the configuration becomes more resistive.

关键词： complex field conductor

Dynamic interactive characteristics between icicle growth and corona discharge on HVDC outdoor insulators during icing accretion

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High Voltage 2023年第3期8卷 570-582页

作者： Yong Liu Chao Li Fanghui Yin Boxue Du masoud farzaneh School of Electrical and Information Engineering Tianjin UniversityTianjinChina Shenzhen International Graduate School Tsinghua UniversityShenzhenChina University of Quebec at Chicoutimi ChicoutimiQuebecCanada

In order to improve the stability and reliability of high voltage direct current(HVDC)transmission lines in cold regions,this article investigated the corona discharges and the icicle growth characteristics on outdoor insulators under DC *** experiments were conducted at CIGELE laboratory at University of *** simulation model of corona discharges and the theoretical model of icicle growth were *** dynamic process and interactive characteristics between the icicle growth and corona discharges under different HVDC voltages were *** results showed that the discharge activity was strong and the cooling effect of ionic air was weak under negative DC voltage,resulting in a large number of bubbles inside the *** negative ions were produced under negative DC voltage,which enhanced the polarisation of water droplets,leading to a greater density of ice beads outside the *** addition,the longest icicles of each insulator under high humidity could bridge the shed *** accumulated charge and leakage current were higher under negative DC voltage,as well as the corona discharge at the top of the icicles lasted ***,the negative DC corona discharge more significantly inhibited the growth of the icicle,resulting in a slower growth rate of the icicles.

关键词： insulator characteristics outdoor

Effect of contamination and relative humidity on the function of thyristor voltage monitoring board

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High Voltage 2022年第6期7卷 1165-1174页

作者： Zichen Liu Liming Wang Hongwei Mei Bin Cao Fanghui Yin Yongsheng Xu Fuzeng Zhang Yi Jiang masoud farzaneh Shenzhen International Graduate School Tsinghua UniversityShenzhenChina Electric Power Research Institute China Southern Power Grid Co.LtdGuangzhouChina Department of Applied Sciences University of Quebec at ChicoutimiChicoutimiQuebecCanada

In recent years,shutdown accidents caused by thyristor voltage monitoring(TVM)board failure have occurred several times in converter *** the increase of operation time,the working reliability problem of TVM board becomes a challenge to the safe *** paper studies the effects of pollution severity and relative humidity(RH)on the function of TVM *** results show that the increase of RH can lead to the advance or even disappearance of check-back ***,the increase of pollution severity can decrease the failure RH *** simulation and equivalent experiment,it is verified that the resistance decrease of the voltage balancing resistor under the combined effect of contamination and RH is the main reason for the advance of check-back *** to the experiments,it is found that the upper surface contamination has a greater effect on the function of TVM board than the lower surface contamination,resulting in more decrease of the failure RH *** addition,leakage current at different RH is also *** show that the pulse peak of leakage current is closely related to check-back *** the pulse peak is too small or disappears,check-back signals also disappear,indicating that the TVM board fails.

关键词： function humidity TVM

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导线表面电场强度对导线覆冰的影响

高电压技术 2018年第3期44卷 1023-1033页

作者：尹芳辉蒋兴良 masoud farzaneh 重庆大学输配电装备及系统安全与新技术国家重点实验室重庆400044 魁北克大学希库蒂米分校电网设备大气覆冰试验室加拿大希库蒂米G7H281

为研究导线表面电场强度对导线覆冰的影响,在魁北克大学希库蒂米分校电网设备大气覆冰试验室（INGIVRE）的人工气候室内通过电晕笼进行导线带电覆冰试验。试验结果表明导线表面电场强度对导线覆冰质量、形状、冰凌间距、电晕损失以及泄... 详细信息

为研究导线表面电场强度对导线覆冰的影响,在魁北克大学希库蒂米分校电网设备大气覆冰试验室（INGIVRE）的人工气候室内通过电晕笼进行导线带电覆冰试验。试验结果表明导线表面电场强度对导线覆冰质量、形状、冰凌间距、电晕损失以及泄漏电导和导线电容等产生影响。电场强度的增加使雾凇表面产生水膜、雨凇冰凌长度减少。当导线表面电场强度≤20 kV/cm时,导线表面覆冰质量随电场强度的增加而增加。电场强度进一步增加时,导线表面覆冰质量减少。当被导线捕获的水滴在重力作用下流到导线下表面后立即被冻结时,冰凌间距和场强无关。当降雨量较大时,冰凌间距随着场强的增加而减少。导线在雾凇和雨凇覆冰时,电晕损失和由电晕产生的电导随场强的增加而增加。雨凇覆冰时,由于冰凌长度的影响,导线表面电场强度为5 kV/cm时导线的单位长度电容反而比电场强度为25 kV/cm时大。

关键词：带电覆冰冰凌间距电晕笼电晕损失泄漏电导导线电容

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冰雪覆盖的绝缘子闪络研究

华东电力 2008年第5期36卷 102-102页

作者： masoud farzaneh umversity Quebec 韩天祥

IEEE2007年12月发表关于冰雪覆盖的绝缘子闪络研究的论文专集。当冰雪天气和污染气候不期而遇时，即使在正常工作电压下，绝缘子也会发生零星的闪络，其中有些原因可归究于绝缘子上的冰雪“搭桥”，但更多的问题是由于常规的清洁雾闪（c... 详细信息

IEEE2007年12月发表关于冰雪覆盖的绝缘子闪络研究的论文专集。当冰雪天气和污染气候不期而遇时，即使在正常工作电压下，绝缘子也会发生零星的闪络，其中有些原因可归究于绝缘子上的冰雪“搭桥”，但更多的问题是由于常规的清洁雾闪（clean-fog）引起。

关键词：绝缘子冰雪闪络覆盖工作电压

Evaluation of microRNA-146a expression in acute lymphoblastic leukemia

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Frontiers in Biology 2016年第1期11卷 53-58页

作者： farzaneh Tavakoli Kaveh Jaseb Mohammad Ali Jalali Far masoud Soleimani Elahe Khodadi Najmaldin Saki Health Research Institute Research Center of Thalassemia & Hemoglobinopathy Ahvaz Jundishapur University of Medical Sciences Ahvaz Iran Department of hematology School of Medical Sciences Tarbiat Modares University Tehran Iran

MicroRNAs （miRNAs） play an essential role in the development and progression of acute lymphoblastic leukemia （ALL）, and could serve as disease biomarkers and therapeutic targets. The function of miR-146a in lymphoid differentiation has been here with discussed. However, the role of this miRNA in the outcome of ALL is not well understood. Peripheral blood of 48 patients with ALL and 20 age- and sex-matched healthy control subjects was used to accurately evaluate the expression of miR-146a by stem-loop Real time PCR. No statistically significant difference was found between patients and controls in total miR-146a expression. The expression of miR-146a was high （18.75%）, low （27.08~o） and not different （54.17%） in ALL patients. Our analysis indicated no association between the expression of miR-146a and any prognostic factors such as WBC/PLT counts, Hb, fusion genes （P190 and some translocations） with ALL type. This study revealed that miR-146a cannot be an independent factor for predicting the outcome of ALL patients. We suggest a multi-parameter analysis including miRNAs, transcription factors and critical genes to achieve a precise clinical panel for prognostic values.

关键词： miR-146a acute lymphoblastic leukemia prognostic marker

Accuracy of Cardiogoniometry in Diagnosis of Coronary Artery Disease in Patients with Angina Pectoris

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World Journal of Cardiovascular Diseases 2016年第11期6卷 383-390页

作者： Seyed masoud Seyedian farzaneh Ahmadi Samira Maalhagh Fard Abdolrahim Nejat Bakhsh Cardiovascular Disease Research Center Ahvaz Jundishapur University of Medical Sciences Ahvaz Iran

Background: Cardiogoniometry (CGM) is a novel non-invasive technique for quantitative three-dimensional vectorial analysis of myocardial depolarization and repolarization. We aimed to determine the diagnostic value of cardiogoniometry for the identification of coronary artery disease (CAD) in patients with history of chest pain. Materials and Methods: Cardiogoniometry was performed in 190 patients with history of chest pain prior to diagnostic coronary angiography. Then cardiogoniometry parameters correlated with angiography findings to determine accuracy of cardiogoniometry for diagnose of CAD. Result: Cardiogoniometry showed a sensitivity of 72% and a specificity of 60%, which was less sensitive than perfusion scan but more sensitive than the ECG and comparable with exercise ECG. The specificity was less than these three methods. Conclusions: Cardiogoniometry is a new, noninvasive method which is helpful in identifying patients with coronary artery disease and can be performed at rest and free of risk such as radiation exposure, and also is suitable for patients who are not able to exercise.

关键词： Angina Ischemia Coronary Artery Disease Cardiogoniometry Non-Invasive Techniques