Introduction and modeling of transmission line lecture 1. Engineers need an overview of the important aspects contemporary applications of transmission lines. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses. Transmission lines are used in power distribution at low frequencies, and in communications at high frequencies. Lecture notes electromagnetic fields, forces, and motion. Shevgaonkar, department of electrical engineering, iit bombay. The greater the radius of the conductors in a transmission line, the lower the inductance of the line. Nptel video lectures, iit video lectures online, nptel youtube lectures. Em fields in a waveguide or transmission line are e j z decomposed into longitudinal and transverse components as. Beyond 60 ghz, its application is restricted due to the losses in the line. Experimental setup for transmission line measurements.
Transmission lines different types of transmission line structures transmission line equations power flow in transmission lines appendix ece 303 fall 2006 farhan rana cornell university guided waves. An overhead power line is an electric power transmission line suspended by towers or poles. V antenna and television set or the wire used between transmitter antenna and transmitter are known as transmission lines. Southwire, one of north americas largest wire and cable producers, has released the third edition of its overhead conductor manual. Electrical design of overhead power transmission lines. Towers for support of the lines are made of wood asgrown or laminated, steel either lattice.
Power sys generation transmission distribution nptel online. Transmission lines and waveguides ebookpptpdf download. Designers guide to stripline circuits supplement b. Introduction to transmission lines and waveguides a transmission line is a device designed to guide electrical energy from one point to another. Transmission lines and em waves nptel online videos. Due to this, there is a general consideration that the use of microstrip transmission line. Introduction to em waves and various techniques of. Nptel provides elearning through online web and video courses various streams. Singh evolution of hvdc systems, comparison of hvac and hvdc transmission systems, components of hvdc transmission system, analysis of hvdc converters, hvdc control, maloperation and protection of converters, filter design, acdc load flow and stability analysis, multiterminal hvdc, different. Transmission lines a transmission line connects a generator to a load a two port network transmission lines include physical construction. Originally published in 1994, the manual has become the design. Consequently, the characteristics of a tl manifest themselves when of the system.
The transmission line is a twoport circuit used to connect a generator or transmitter signal to a receiving load over a distance. Ptec 500 fundamentals of overhead transmission line design. High voltage dc transmission free electrical engineering online course on nptel by iit kanpur s. Oct 11, 2018 prebook pen drive and g drive at teacademy. There are the following types of transmission lines. Refer to the microstrip transmission line applet and design a 33 ohm microstrip. Transmission line shunt and series compensation with voltage sensitive loads article pdf available in international journal of electrical engineering education 464. Download link is provided and students can download the anna university ec6503 transmission lines and wave guides tlwg syllabus question bank lecture notes syllabus part a 2 marks with answers part b 16 marks question bank with answer, all the materials are listed below for the students to make use of it and score good maximum marks with our study materials. It is used, for example, to transfer the output rf energy of a transmitter to an antenna. Main elements of a transmission line due to the economic considerations, threephase threewire overhead system is widely used for electric power transmission. Lecture 2introduction to transmission lines youtube.
Electrical engineering engineering electromagnetics nptel. Electronics transmission lines and em waves youtube. Equations of voltage and current on tx line youtube. Transmission lines in an ac power system, a tl will operate at some frequency f.
Transmissionlines parameters to develop models of transmission lines, we first need to determine the tl parameters. Two parallel wires coaxial cable microstrip line optical fiber waveguide very high frequencies, very low loss, expensive etc. In practical transmission lines, instead of using heavy and inflexible conductors of large radii, two and more conductors are bundled together to approximate a large diameter conductor, and reduce corona loss. Calculate the line inductancemeter and capacitance meter. Sinha, department of electrical engineering,iit kharagpur. Transmission lines include coaxial cable, a two wire line, a parallel plate or. The more detailed factors for transmission line protection directly address dependability and security for a specific application. These are the structures towerspoles that support the transmission.
Your goto guide for overhead conductors and line design. Power sys generation transmission distribution nptel. Because lo and co do not depend on frequency for a superconductor, the phase velocity is independent of frequency. Review of all concepts from ap physics c mechanics 2020 duration. Transmission line parameter an electric transmission line has four parameters, namely resistance, inductance, capacitance and shunt conductance. The characteristic parameters of the transmission line are. Overhead power lines are structures that are used in electric power transmission and distribution over long distance. Transmission line is defined as the path of carrying alternating electrical energy from source to load. Jul 18, 2019 a long transmission line is defined as a transmission line with an effective length more than 250 km 150 miles. Transmission lines and electromagnetic waves nptel. Introduction the electrical power generated in the generating station is transmitted with the help of transmission lines. Short transmission lines line voltage is less than 20kv length of transmission line is upto about 50km capacitance effect are small or negligible 6.
Transmission line equations in phasor form kenneth h. Shevgaonkar, dept of electrical engineering, iit bombay for more details on nptel visit. To accurately model a long transmission line we must consider the exact effect of the. Pdf electrical design of overhead power transmission lines. Example problem a 220kv, 150 mva, 60hz, threephase transmission line is 140 km long. Get the third edition of southwire companys overhead conductor manual. The formula for c0see chapter 4, which is the shunt capaci tance between the conductors, is c0d 2. Travelling wave on transmission line is the voltage current waves which propagate from the source end to the load end during the transient condition. Shevgaonkar department of electrical engineering iit bombay. Transmission lines and em waves usb media storage type. Transmission line is a conductor or conductors designed to carry electricity or an electrical signal over l. Assume the impedance of the line is 50 ohm, phase constant is 20 radm and the operating frequency is 700mhz. This produces a variable mho characteristic whose diameter varies with the type of fault, the fault location, and the source impedance. Nptel syllabus transmission lines and em waves video course 1.
The voltage and the current exist in the form of waves on a transmission line. High voltage dc transmission ee 488 by nptel on iit kanpur. Electromagnetic theory and transmission lines pdf notes. Also, the amount of attenuation is extremely small, since this is due to ro. This course deals with the principles of electromagnetics at high frequencies. These four parameters are uniformly distributed along the whole line.
Dispersionless transmission lines because lo and co do not depend on frequency for a superconductor, the phase velocity is independent of frequency. Transmission lines and electromagnetic waves video. So that a pulse will propagate down a superconducting transmission line without dispersing. Assume we have a transmission line in which air separated the two perfect conductors. As soon as current flow and voltage exist in a transmission line, another property becomes quite evident. Benefits of highvoltage direct current transmission systems. Multilayer microstrip lines in general, the microstrip line is used to conduct the electromagnetic wave at low frequency. Comparison with normal transmission line september 25, 2003. These waves travel along the line with the velocity equal to velocity of light if line losses are neglected. Electromagnetics transmission lines exam study material for. Hon tat hui transmission lines basic theories nusece ee2011 28 example 1 a 100. The analysis of travelling waves on power system transmission lines. The choice of transmission system is made by keeping in mind various factors such as reliability, efficiency and economy.
Slyslyg 6080 phase and ground distance relays therefore it is not possible to divide all of the terms by 1 and produce a fixed characteristic on an rx diagram. Hvdc transmission lines siemens hvdc transmission pdf 1 2 related searches for hvdc transmission nptel. Transmission lines different types of transmission line structures transmission line equations power flow in transmission lines appendix ece 303 fall 2006 farhan rana cornell university. If the transmission line route is longer than about 300 miles, dc is a better option because ac lines have more line losses than dc for bulk power transfer. Lecture notes on power system engineering ii vssut. General properties of tem transmission lines 537 z l c,c 1 v. Carpenter department of electrical and computer engineering kansas state university november 19, 2004 the text for this class presents transmission lines in phasor form by. Pdf ec6503 transmission lines and wave guides tlwg. Each line element has its own value, and it is not possible to concentrate or lumped them at discrete points on the line. This energy will not travel through normal electrical wire without great losses. Transmission lines and em waves nptel online videos, courses. What are the main components of overhead transmission of. Gate preparation, nptel video lecture dvd, electronicsandcommunicationengineering, electromagnetics, transmission lines, vector calculus elements, divergence.
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