CHAPTER-1

INTRODUCTION

1.1 History

Increasing transmission distance and capacity is always the motivation to advance power industry technologies . In the history of the ac transmission system, increasing distance and capacity mainly depends on raising voltage level of transmission lines. At present, the highest voltage level of the ac power transmission line in operation is 750 kV. To further upgrade, the voltage level encounters difficulties of material and environment issues. The high-voltage direct current (H ....etc

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I can't get my sonometer readings ..pls give me a readings pls pls help me ....etc

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Q.1: What is meant by electric current?
Ans. The flow of electrons.

Q.2: What are A.C. and D.C. currents?
Ans. Alternating current (A.C.) changes its direction with a definite frequency. The direct current (D.C.) flows in one direction only.

Q.3: What is meant by frequency?
Ans. Number of vibrations per sec.

Q.4: What is the frequency of A.C. in Nepal?
Ans. 50 cycles/s.

Q.5: What types of waves are produced in the thread?
Ans. Transverse stationary waves.

Q.6: What kind of vibrations are produced in the thread?
Ans. Forced ....etc

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Simona Coman1, V. Comnac1, Member IEE, Cr. Boldisor1, D.C. Dumitrache2
1Automation Department, Transilvania University of Brasov, 5 M.Viteazu Str.,
500174 Brasov, Romania, phone/fax: +40 0268 418836,
2 Department of Automatic Control, Technical University of Cluj-Napoca,
26-28 Gh. Baritiu Str., 400027 Cluj-Napoca, Romania



Abstract

The distributed control systems with communication
networks are used in many industrial applications. These systems
are often referred as Networked Control Syste ....etc

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to get information about the topic fractional order control systems file type related topic refer the page link bellow

http://seminarsprojects.net/Thread-fractional-order-control-for-dc-electrical-drives-in-networked-control-systems?pid=28920#pid28920 ....etc

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The High frequency attenuation in shielded distribution cable has been extensively studied. But in the case of solid dielectric cable, this has not been done. A solid dielectric cable has a bit more complex structure including the semiconducting bedding layers and a moisture barrier.high frequency loss is created by these sources.The purpose of these bedding layers is to seal the cable against moisture ingress and also accomodate for the thermal expansion of the cable. The cables studied here are the ones with a corrugated copper sheath and ....etc

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A Technique for Orthogonal Frequency Division Multiplexing
Frequency Offset Correction

Abstract:
The Orthogonal Frequency Division Multiplexing (OFDM) is a Multi Carrier Modulation technique employing Frequency Division Multiplexing of orthogonal subcarriers. It is also sometimes called as discrete multitone modulation (DMT). It is better than CDMA in high bit rate and Broadband Communications .It is a multi carrier technique, which is very sensitive to Frequency Offset between transmitter and receiver. Th ....etc

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pOWER TRANSMISSION THROUGH FRACTIONAL
FREQUENCY SYSTEM


ABSTRACT

The fractional frequency transmission system FFTS is a very promising long -distance transmission approach, which uses lower frequency (50/3) to reduce the electrical length of the AC power line, and thus its transmission capacity can be increased several fold . This paper introduces the primary experiments results of FFTS.

The experiment uses the phase-controlled cycloconverter as the frequency changer, stepping up 50/3Hz electricity to 50Hz electricity and ....etc

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To get full information or details of fractional frequency transmission system ppt please have a look on the pages

http://seminarsprojects.net/Thread-fractional-frequency-transmission-system?pid=32451&mode=threaded

http://seminarsprojects.net/Thread-fractional-frequency-transmission-system?pid=8139&mode=threaded

if you again feel trouble on fractional frequency transmission system ppt please reply in that page and ask specific fields in fractional frequency transmission system ppt ....etc

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Hii!
i want more details about fractional order pid,
by genetic algorithm or Pso algorithm or ..

Thank you ....etc

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