Results 61 to 70 of about 141 (133)
An efficient deep learning based scheme for adaptive auto-reclosing in power transmission lines
Alexandria Engineering JournalAs a large percentage of faults in transmission lines are single-line-to-ground (SLG) and transient in nature, the use of adaptive single-phase auto-reclosing (ASPAR) schemes is essential.
Farhad Hatami Aloghareh +2 more
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Estimation of Current Distribution in the Electric Railway System in the EMTP-RV
, 2017 Current distribution is important for the electromagnetic compatibility and electromagnetic fields calculations. The current value directly determines the magnetic field and consequently coupling of the systems. The return current has an opposite direction of supply current and decreases coupling and interferences.
Milešević, Boško +2 more
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Risk Analysis of Energy Systems Integrated With Renewable Energy Resources
IEEE AccessThe switching surges that arising due to integrating renewable energy resources with power grids have become the major factor in the insulation coordination of the power systems. Consequently, it is urgent to perform proper risk analysis of the switching
Samy M. Ghania
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مهندسی مخابرات جنوبThe failures of the power system are caused by insulation damages of HV apparatus including transformers, HV cables and generators. They are expensive. In the beginning, insulation failures occure in limited regions of insulation, which is called partial
Amir Ghaedi +2 more
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IEEE AccessFor power grids with a high penetration level of wind power generation, stochastic wind speed variation adversely affects the frequency stability. A variable-speed wind turbine generator would deloads its output by shifting the power operating point to ...
Min Hwang, Kyung-Soo Kook
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IEEE AccessThe increasing integration of inverter-based resources (IBRs) alongside traditional synchronous generators (SGs) presents new challenges for maintaining stability and resilience in modern power systems.
M. Alizadeh, Wei Sun
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A novel directional pilot protection method for EHV transmission lines based on S-transform and SVM
Discover Applied SciencesTo address the issues of insufficient reliability and low sensitivity of traveling-wave (TW)-based protection caused by fault condition attributes, i.e., fault resistance and fault angle, this paper proposes a novel directional pilot protection method ...
Zhenwei Guo +3 more
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The Lightning Protection Assessment of Distribution Lines with Considering Frequency Grounding System [PDF]
Iranian Journal of Electrical and Electronic EngineeringEnsuring the protection of all components within power systems from lightning-induced overvoltage is crucial. The issue of power interruptions caused by both direct and indirect lightning strikes (LS) presents significant challenges in the electrical ...
Aida Gholami +2 more
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Gaoya dianqi发电机断路器（GCB）位于发电机组和升压变压器之间，针对负荷电流高达50 kA、故障电流高达200 kA以上的大容量机组，GCB传导和开断电流远高于线路断路器，在开断过程中，GCB两端会产生非常严重的瞬态恢复过电压，威胁GCB的可靠性。文中基于某大型核电站的实际接线，单机容量为1 722.2 MVA，利用EMTP-RV仿真计算研究了GCB在各种故障下开断时的TRV的电磁暂态特性，分析配置不同容量电容器对TRV幅值和陡度的影响效果。提出了采用辅助断口装设非线性阻尼电阻抑制TRV的方法 ...
白玉卓 +6 more
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Dianci bileiqi金属氧化物避雷器的优异非线性、良好的陡度响应特性和大的通流容量，在电力系统过电压保护方面作用显著。近年来随着超高压电力网覆盖面扩大，电力系统运行环境愈加复杂，运行中出现了多起在多重雷击情况下500 kV超高压站内MOA损坏事故，损坏的表象大多是MOA电阻片贯穿性炸裂。为了探究多重雷击下500 kV 超高压站内MOA的损坏原因，笔者使用EMTP-RV，结合某次故障实际录波图模拟分析了多重雷侵入波下500 kV站内MOA动作负荷特性和能量积累，并依据MOA固有的温度、能量特性 ...
康超, 王致远, 张宗扬, 郭洁
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