نتایج جستجو برای: power transmission protection

تعداد نتایج: 875704  

Journal: :EURASIP J. Wireless Comm. and Networking 2012
Harald Burchardt Zubin Bharucha Gunther Auer Harald Haas

One of the key challenges for future orthogonal frequency division multiple access-based networks is inter-cell interference coordination. With full frequency reuse and small inter-site distances, coping with co-channel interference (CCI) in such networks has become increasingly important. In this article, an uplink interference protection (ULIP) technique to combat CCI is introduced and invest...

2017
Antans Sauhats Andrejs Utans Dmitrijs Antonovs Andrejs Svalovs Akhtar Kalam

From time to time a sequence of unexpected and overlapping contingencies may lead to power system angular instability and even blackouts if not addressed adequately by means of an out-of-step (OOS) protection system. The motivation of the paper is an attempt to develop a workable prototype of the OOS protection system. The deficiencies of the protection currently used in the Latvian Power Syste...

2015
M. KEZUNOVIC P.-C. CHEN A. ESMAEILIAN M. TASDIGHI

1 INTRODUCTION This paper relates to a new protection paradigm where corrective, adaptive and predictive relaying features are introduced. The value of corrective relay operation can be assessed by looking at the situations when relay mis-operations occur. Analysis of recent historical blackouts has revealed that the power system catastrophic events happened following consecutive cascading even...

2000
Z Gajic G Z Shen J M Chen Z F Xiang

Power utilities are aware of the specific characteristics and requirements for their network. For this reason, they may require additional functionality from the protective devices and secondary systems included in their power network. Therefore ECEPA requires a number of specific tests to be conducted on the protection system proposed for a particular application to prove the suitability of th...

Journal: :Sig. Proc.: Image Comm. 2005
Fan Zhai Yiftach Eisenberg Thrasyvoulos N. Pappas Randall Berry Aggelos K. Katsaggelos

We consider efficiently transmitting video over a hybrid wireless/wire-line network by optimally allocating resources across multiple protocol layers. Specifically, we present a framework of joint sourcechannel coding and power adaptation, where error resilient source coding, channel coding, and transmission power adaptation are jointly designed to optimize video quality given constraints on th...

Journal: :the modares journal of electrical engineering 2011
gholamreza kamyab mahmoud fotuhi-firuzabad massoud rashidi-nejad

in this paper, first, a new criterion, titled “surplus percent of the customers” is defined for static transmission expansion planning in restructured power systems. then by a simple example, the new criterion is compared with some already presented market-based criteria and it is shown that the new criterion can realistically evaluate the transmission network expansion from the market view. in...

2004
James S Thorp Xiaoru Wang Kenneth H. Hopkinson Denis V. Coury Renan Giovanini

Introduction Power systems have undergone a great deal of change in the past decade. The United States electric power grid was deregulated in the late 1990’s. As a result, it is increasingly operated with smaller generation reserves and more transmission congestion. If deregulation continues, it seems likely that power flows will be larger and will fluctuate to a greater extent in future years....

Journal: :IOP Conference Series: Materials Science and Engineering 2019

Journal: :INTERNATIONAL JOURNAL OF ELECTRICAL ENGINEERING & TECHNOLOGY 2019

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