Results 81 to 90 of about 655 (182)
Veterinary Medicine and Science, Volume 10, Issue 6, November 2024.Over the course of the study, heavy metals (Cr, Cu, Cd, Fe, Zn and Pb) were analysed using Flame atomic absorption spectrophotometer. The assessed mean concentrations of heavy metals follow the trend: Fe > Pb > Zn > Cr > Cu > Cd. A moderate seasonal variation was found among the sampling sites.
Afsana Kamal +5 more
wiley +1 more source
IET Generation, Transmission &Distribution, Volume 18, Issue 22, Page 3646-3656, November 2024.A full‐size steel‐framed residential test platform was constructed near a 1000‐kV ultra‐high‐voltage AC transmission line, then the performances of transient electric shocks when human bodies contacting a metal clothes hanger were investigated. The transient shock current characteristics and correlation between transient shock energy and human ...
Wangling He +7 more
wiley +1 more source
Dianci bileiqi, 2022 为了提高输电线路的耐雷水平以及线路发生短路故障时故障电流能够通过接地体快速散流，以保障电力系统能够安全、稳定运行，本研究从实际运行的线路杆塔接地体入手，对其开展降阻优化工作，首先进行原有杆塔接地体的现场勘查，包括原有接地体工频接地电阻值和土壤电阻率分层的测量，其次在CDEGS中建立原有杆塔接地体的模型，验证仿真计算应用于接地体设计的可行性，最后在CDEGS中进行接地体的优化结构设计，包括增加射线和垂直接地极两种形式，计算结果证明在原有接地体周围增加射线可以起到较好的降阻作用 ...
王旭明 +4 more
doaj
Pleiotropic phenotypic effects of the TaCYP78A family on multiple yield‐related traits in wheat
Plant Biotechnology Journal, Volume 22, Issue 10, Page 2694-2708, October 2024.Summary Increasing crop yield depends on selecting and utilizing pleiotropic genes/alleles to improve multiple yield‐related traits (YRTs) during crop breeding. However, synergistic improvement of YRTs is challenging due to the trade‐offs between YRTs in breeding practices.
Meng Ma +13 more
wiley +1 more source
Grid Grounding Calculations for a 132-KV Substation Using Soil Backfilling
IEEE Access, 2019 Safe and reliable grid design is complicated by the compact design of gas insulated substations (GIS). This paper discusses the complete grounding design procedure for a 132-KV substation in the city of Al Kharj based on the IEEE-80 specifications and ...
Saeed Alyami
doaj +1 more source
Modelling linesmen's potentials in proximity to overhead lines [PDF]
, 2009 A test object which can represent the human body in experiments near energized high-voltage (HV) conductors has been developed. Induced potentials of the object have been measured inside an HV laboratory and at an outdoor 400-kV substation.
Ahmed, Yasir +1 more
core +1 more source
Dianci bileiqi, 2013 为了简化计算双层土壤结构中特高压输电线路杆塔接地电阻,提出了将双层土壤结构等效为均匀土壤结构的计算方法。采用CDEGS软件仿真不同反射系数、不同上层土壤的厚度、不同垂直接地体长度的数据计算等值土壤电阻率,通过非线性拟合,得到等值土壤电阻率的计算公式,从而计算特高压杆塔单塔基接地电阻。还通过数据拟合得到利用系数的计算公式,从而计算四塔基的接地电阻。最后对拟合公式计算的接地电阻与CDEGS软件仿真计算的接地电阻进行了比较分析,其结果表明,简化公式有较高的精度,可为工程设计提供参考。
王兵, 潘文霞
doaj
Calculating current and temperature fields of HVDC grounding electrodes
Journal of Modern Power Systems and Clean Energy, 2016 Current field calculation based on the resistance network method (RNM) and temperature field calculation based on the finite volume method (FVM) can be used to evaluate the performance of high-voltage direct-current (HVDC) grounding electrodes.
Zheren Zhang, Zheng Xu, Tao Xu
doaj +1 more source
Gaoya dianqi, 2014 为研究金属构架遭雷击时的电磁特点及其影响因素,并应用于实际建构筑物的工程计算分析,提出将CDEGS软件应用于于这种计算,并利用电路法、有限元法和实验数据的对比验证了其可行性。文中还对金属构架内雷击电磁特点和部分影响因素进行了分析,得到离雷击点越远的垂直导体分流系数越小、各导体之间区域的磁场强度远小于导体附近等结论,并给出了雷击建构筑物时室内电子设备电磁防护的一些注意点。最后对一通信塔进行了实例分析。综上,CDEGS可应用于雷击室内电磁环境评估,具有一定的科研和业务应用价值。
沈寰, 冯民学, 李晓明
doaj
Transmission lines design to meet community requirements during constructions
, 2014 High Voltage (HV) transmission lines are widely spread around residential places. They take all forms of shapes: concrete, steel, and timber poles. Earth grid always form part of the HV transmission structure, whereas soil resistivity value is one of the
J. Rizk +9 more
core +1 more source