نتایج جستجو برای: power distribution protection

تعداد نتایج: 1220767  

Turning to Renewable Energy Sources (RES) is the most logical politics in securing the modern society from critical changes in earth increasing temperature. However, Distributed Generation (DG) sources could lead to new challenges in electricity network, mainly allocation of DG sources in distribution level of power system will set the existing network under stress of power flow parameters. The...

The microgrid concept provides attractive solutions for reliability enhancement of power distribution systems. Normally, microgrids contain renewable-energy-based Distributed Generation (DG) units, which their output power varies with different environmental conditions. In addition, load demand usually changes with factors such as hourly and seasonal customer activities. Hence, these issues hav...

2012
Morteza Talebi Jianan Wang Zhihua Qu

The security of power systems against malicious cyberphysical data attacks becomes an important issue. The adversary always attempts to manipulate the information structure of the power system and inject malicious data to deviate state variables while evading the existing detection techniques based on residual test. The solutions proposed in the literature are capable of immunizing the power sy...

2005
V. Dubec S. Bychikhin M. Blaho M. Heer D. Pogany E. Gornik

A 2D backside transient interferometric mapping (TIM) method for nanosecond thermal energy imaging at multiple time instants during a single stress event is introduced. The method is based on fringe interferometry and the interferograms are analyzed using the Fast Fourier Transform technique. The method is applied to investigate moving current filaments in smart power DMOS transistors and in el...

Journal: :the modares journal of electrical engineering 2015
morteza shabanzadeh mhrdad setayesh-nazar

the paper tries to present an improved mathematical model for distribution companies (discos) in order to solve distribution network expansion planning (dnep) problems in the presence of certain resources of distributed generations (dgs) entitled small scale gas engines in the medium voltage grids. with the aim of minimizing investment and operation costs, the recommended model combines a compr...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه مازندران 1387

چکیده ندارد.

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علم و صنعت ایران - دانشکده مهندسی برق 0

اضافه ولتاژهای ایجاد شده در سیستم قدرت ناشی از عوامل مختلف اعم از صاعقه و کلیدزنی سبب ایجاد تنش بر روی تجهیزات مختلف سیستم قدرت و تخریب عایقی می گردند. برق گیرها از جمله عناصرمهم حفاظت سیستم های قدرت در مقابل اضافه ولتاژ ها می باشند. کاربرد گسترده برق گیرهای اکسید روی و اهمیت رفتار دینامیکی این تجهیزات در تعیین محل مناسب برقگیر و هماهنگی عایقی، لزوم استفاده از مدلی دقیق برای شبیه سازی این رفتار...

Journal: :Journal of Statistical Theory and Applications 2022

Abstract The Lindley distribution has been generalized by several researchers in recent years. In this paper, we introduce and study a new generalization of extended power named alpha transformed ( APTEPL ) that provides better fits than the Power existing generalizations. It includes Lindley, as special cases. article various properties such moments, moment generating function, Characteristic ...

Journal: :journal of paramedical sciences 0
nargess soltanizadeh faculty of management, islamic azad university central tehran branch, tehran, iran naser sanaei faculty of management, islamic azad university central tehran branch, tehran, iran

organizational culture of an organization is one of the fundamental staffs' job satisfaction factors. this study aimed to determine the effects of organizational culture on faculty members' job satisfaction using hofstede's model. in a descriptive applied study 61 faculty members of shahid beheshti university of medical sciences were randomly selected and studies in 2015. hofstede's model were ...

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