Results 31 to 40 of about 7,353 (217)

A Solid State Transformer model for power flow calculations [PDF]

open access: yes, 2017
This paper presents the implementation of a Solid State Transformer (SST) model in OpenDSS. The goal is to develop a SST model that could be useful for assessing the impact that the replacement of the conventional iron-and-copper transformer with the SST
Guerra Sánchez, Luis Gerardo   +1 more
core   +2 more sources

基于EMTP仿真和实测的接地电缆雷电过电压特性分析

open access: yesDianci bileiqi, 2021
针对目前缺少有效设备仪器和方法保护接地系统雷击浪涌的问题,文中系统化地研究了地下配电电缆中使用的接地系统的暂态特性。通过现场实验测试与EMTP仿真分析,对传统多点接地电缆系统和非捆绑式公共接地电缆系统中性线感应的雷电过电压进行了评估计算与详细比较。首先通过EMTP软件建立配电缆雷击感应电压计算仿真模型;然后通过比较实际测量结果与EMTP仿真所得到的数值结果,验证本研究所建立的仿真模型的有效性和准确性。最终,通过验证后的模型的EMTP仿真结果对雷电绝缘水平进行预测。
廖思哲, 王婉婷, 郑刚
doaj  

Comparative study of 220 kV overhead transmission lines models subjected to lightning strike simulation by using electromagnetic and alternative transients program

open access: yesElectrical engineering & Electromechanics, 2022
Introduction. In high voltage networks intended for the transport of electrical energy, lightning can strike an electric line striking either a phase conductor, a pylon or a ground wire, causing significant overvoltage on the transmission lines ...
S. Boumous   +3 more
doaj   +1 more source

Efficient Computation of Sensitivity Coefficients of Node Voltages and Line Currents in Unbalanced Radial Electrical Distribution Networks [PDF]

open access: yes, 2012
The problem of optimal control of power distribution systems is becoming increasingly compelling due to the progressive penetration of distributed energy resources in this specific layer of the electrical infrastructure. Distribution systems are, indeed,
Boudec, Jean-Yves Le   +3 more
core   +2 more sources

Improved transient simulation of salient-pole synchronous generators with internal and ground faults in the stator winding [PDF]

open access: yes, 2005
An improved model for simulating the transient behavior of salient-pole synchronous generators with internal and ground faults in the stator winding is established using the multi-loop circuit method.
Bi, D.Q.   +4 more
core   +1 more source

Integrated Analysis Reveals Functional Ingredients Biosynthesis and Regulatory Mechanisms in Elaeagnus mollis Diels Leaf

open access: yesFood Science &Nutrition, Volume 14, Issue 3, March 2026.
The content of functional ingredient fluctuated in E. mollis leaf. The functional ingredients biosynthesis pathways were revealed. EmNAC014 and EmMYB15 played key roles in functional ingredients biosynthesis. ABSTRACT Elaeagnus mollis Diels is a newly developed woody oil crop, and the biosynthesis and regulatory mechanism underlying functional and ...
Hu Xiaoyan   +8 more
wiley   +1 more source

¿Es relevante la educación media técnico-profesional?

open access: yesPersona y Sociedad, 2009
La Educación Media Técnico-Profesional (EMTP) del país ha sido recientemente objeto de una mirada crítica a raíz de una serie de problemas en sus condiciones de funcionamiento.
Iván Ortiz
doaj   +1 more source

Busbar Fault Direction Identification Using Sequences of Displacement Vectors

open access: yesEngineering Reports, Volume 8, Issue 2, February 2026.
In this paper, a novel busbar fault direction identification scheme is presented. The proposed scheme is based on sequences of displacement vectors. The proposed algorithm is fast and simple enough to be embedded in a differential relay to assist the percentage‐restraint differential algorithm.
Mostafa Sarlak
wiley   +1 more source

Making a Dynamic Interaction Between Two Power System Analysis Software

open access: yes, 2017
This paper presents a distributed simulation based method for harmonic resonance assessment (HRA) in multi-area large-scale power systems. Further consideration is devoted to the early harmonic frequency-scan formulation to shape them into a Bordered ...
Kouhsari, Shahram Montaser   +1 more
core   +1 more source

Advanced Clustering and Optimisation Techniques for Adaptive Protection in AC Microgrids With Hardware‐in‐the‐Loop Testing

open access: yesEnergy Science &Engineering, Volume 14, Issue 1, Page 377-398, January 2026.
Standard and proposed non‐standard OCR characteristics. ABSTRACT This study introduces an advanced adaptive protection approach for AC power systems, designed to address key limitations in current clustering‐based relay coordination methods. Using K‐means, hierarchical, and spectral clustering techniques, the proposed scheme classifies grid operating ...
Feras Alasali   +6 more
wiley   +1 more source

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