نتایج جستجو برای: power transmission line

تعداد نتایج: 1084377  

Journal: :International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering 2015

2001
T. C. Banwell S. Galli

Abstract – The “indoor” access network is characterized by several branches and impedance mismatches that cause many reflections. In the present paper, a new way of modeling the transfer function of a power line is proposed. The proposed model starts by considering the power line channel as a uniform transmission line. This allows the power line channel to be described as a cascade of simple tw...

Journal: :The Review of scientific instruments 2010
Alexander W Kieckhafer Mitchell L R Walker

A rf power system has been developed, which allows the use of rf plasma devices in an electric propulsion test facility without excessive noise pollution in thruster diagnostics. Of particular importance are thrust stand measurements, which were previously impossible due to noise. Three major changes were made to the rf power system: first, the cable connection was changed from a balanced trans...

2015
Haiyan Guan Yongtao Yu Jonathan Li Zheng Ji Qi Zhang

This paper presents a step-wise method for extracting powertransmission lines and towers from vehicle-borne light detection and ranging (lidar) data. First, this method estimates road ranges with regard to incidence angles and separates off-road points from road-surface points by applying elevation-difference and slope criteria to the road ranges scan-line by scan-line. Then, three filters, in ...

Journal: :Int. J. Communication Systems 2003
Tooraj Esmailian Frank R. Kschischang P. Glenn Gulak

In-building power lines have often been considered as attractive media for high-speed data transmission, particularly for applications like home networking. In this paper, we develop models for power line channels based both on theoretical considerations and practical measurements. We consider power line channel frequency response and noise models in the 1–30 MHz band and propose a number of po...

Journal: :JCP 2014
Fang Zhang Jianping Chen Chuandong Li Yanjuan Wu

The unified power flow controller (UPFC) is one of the most promising flexible AC transmission systems (FACTS) devices for the power flow control. The main objective of power flow control for UPFC is to improve the power flow distribution and increase the transmission capacity over the existing transmission corridor or line. This paper presents a practical engineering methodology of embedding t...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز 1381

این پایان نامه در ارتباط با اصلاح کننده های کیفیت توان و یا ‏‎active power line conditioners‎‏که به اختصار به ‏‎aplc‎‏ معروف است ، می باشد ‏‎aplc‎‏یکی از مهمترین سیستمهایی می باشد که می تواند مشکلات مربوط به کیفیت قدرت ر سیستمهای توزیع را حل نماید. ‏‎aplc‎‏ به مجموعه ای از اکتیو فیلترها خطاب می شود. در حال حاضر هیچ تعریف منحصر به فردی جهت محاسبه توان برای شکل موجهای کلی ولتاژ وجریان وجود ندارد....

2012
J. C. Li Y. L. Wu Y. A. Liu J. Y. Shen S. L. Li C. P. Yu

A generalized two-way coupled-line power divider with extended ports for dual band is proposed in this paper. The power divider is composed of two section coupled-lines, one conventional transmission line, and an isolation resistor, and employs extension of a transmission line or coupled-line at each port. The design equations are obtained based on evenand odd-mode analysis, and analytical idea...

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