نتایج جستجو برای: power lines

تعداد نتایج: 693454  

The Markov random field (MRF) theory has been accepted as a highly effective framework for designing noise-tolerant nanometer digital VLSI circuits. In MRF-based design, proper feedback lines are used to control noise and keep the circuits in their valid states. However, this methodology has encountered two major problems that have limited the application of highly noise immune MRF-based circui...

براتی, جواد , درودی, عارف ,

Fault location is an interesting subject in power grids. On the other hand, the application of fault current limiter (FCL) has been increasing in power network and causes some problems in operation of protection systems. This paper studies the application of FCL in power system and its effect on one-ended simple reactance fault location methods. In these methods, only voltages and currents of t...

Journal: :international journal of smart electrical engineering 2015
sadegh etemad nasser mozayani

the use of renewable energy in power generation and sudden changes in load and fault in power transmission lines  may cause a voltage drop in the system and challenge the reliability of the system. one way to compensate the changing nature of renewable energies in the short term without the need to disconnect loads or turn on other plants, is the use of renewable energy storage. the use of ener...

Journal: :the modares journal of electrical engineering 2009
hossin - afrakhteh mahmoodreza haghifam ali - yazdian

in this paper, power system restoration in the presence of svc and tcsc in partial outage conditions is considered and a new method for maximum load restoration using different control variables is presented. control variables are tap of transformers, generation rescheduling and operating points of facts devices. objective function is restored load (to be maximized) and constraints are voltage ...

In this paper two dimensional wave propagation is used for power combining in drain nodes of a distributed amplifier (DA). The proposed two dimensional DA uses an electrical funnel to add the currents of drain nodes. The proposed structure is modified due to gate lines considerations. Total gain improvement is achieved by engineering the characteristic impedance of gate lines and also make appr...

Journal: :International Journal of Communications, Network and System Sciences 2012

Journal: :CoRR 2017
Pooya Monshizadeh Nima Monshizadeh Claudio De Persis Arjan van der Schaft

Coping with lossy distribution lines has been an obstacle in control and stability of power networks. Often, imposing an inductive output impedance to the sources has been considered as a means to justify the commonly adopted assumption of purely inductive lines, which in turn facilitates the construction of energy-based Lyapunov functions. In this paper, we propose a measure to evaluate the in...

Journal: : 2021

The purpose of the article is to analyze damage rate overhead power transmission lines (OPL) in medium-voltage electrical distribution networks Irkutsk region. established International Indices that determine level reliability functioning electric are considered, and information on compliance condition Russia with these indices analyzed. Analytical elements their causes Europe, America, present...

2008
Alexandre Piantini

Distribution lines are often located in areas with high ground flash densities, being therefore subject to lightning-caused power interruptions. This paper presents an overview of the various types of lightning overvoltages that can arise on overhead power distribution networks, as well as typical voltage waveforms. The effectivenesses of the most important methods for mitigating such overvolta...

2007
Yongan Deng

1.1 General Introduction During the past two decades, the increase in electrical energy demand has presented higher requirements from the power industry. More power plants, substations, and transmission lines need to be constructed. However, the most commonly used devices in present power grid are the mechanically-controlled circuit breakers. The long switching periods and discrete operation ma...

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