Introduction to transient analysis of power systems. Unit iv traveling waves on transmission line sri vidya college of. The book is intended primarily as a basic text book in high voltage engineering at the final year level of a four year undergraduate course specialising in electrical engineering, with emphasis on heavy current engineering. High speed fault clearance is an effective method of increasing power transfer and improving the transient stability of a power system 2, 3. What are th e properties of bewleys lattice diagram. Draw the bewley lattice diagram for problem 1, and. What are the properties of bewleys lattice diagram. The transmission line conductors have resistances and. Lightning surge may be caused by either direct strokes or by. The bewley lattice diagram is a spacetime diagram with the space measured horizontally and time vertically, and the lattice for the above example is shown in fig. Transients in transmission lines free download as powerpoint presentation. Pdf ee6701 high voltage engineering hve books, lecture. Understanding the operation of transmission lines used in conjunction with high speed circuits is necessary in order to be able to completely characterize. Ee2353 high voltage engineering syllabus online engineering.
An impolite campaign raged in the late 1880s between tesla en edison, the socalled. Lattice diagrams are used to calculate and understand reflections and their effects on voltage waveforms. Problems of high voltage engineering must also be tackled in power electronics. This paper presents an extensive literature survey of previous. Reflection lattice of a travelling wave in the arrangement shown in the figure, there are two junctions 1 and 2. Reflection and transmission at a tjunction and bewley lattice diagrams are explained. Ee 8701 high voltage engineering a course material on ee. Ee 2353 high voltage engineering a course material on. Electric power transmission system engineering analysis. Pdf bewleys lattice diagram is a graphical method that has been widely used for determining value of. A source of lightning surge wave on power transmission lines is modeled by using heidlers surge model.
High voltage engineering ee8701, ee6701 anna university. High voltage engineering notes hve notes hve pdf notes. Online study material, lecturing notes, assignment, reference, wiki and important questions and answers. N ovdec 2011 the lattice diagram determines the voltage at a given point and time in a transmission system. Sep 03, 2011 ee2353 high voltage engineering aim to expose the students to various types of over voltage transients in power system and its effect on power system.
The transmission and reflection coefficients can be calculated as follows. This deals with the discussion on traveling waves on transmission lines during transient conditions. Conclusions 1 a new approach to the study of the transient response and the frequency characteristics of the overhead line towers, when subjected to lightening strikes, is presented. Part ill examination october 20 319high voltage engineering. One of the main concern of high voltage engineers is for insulation testing of various powersystem components under powerfrequency ac, dc, switching, and lightning impulse voltages. The proposed method was tested against medium voltage power transmission lines in comparison with the solution obtained by using bewley lattice diagram. Power system analysis and design 6th edition pdf download.
Based on the reflection and refraction of travelling waves, bewley proposed a graphical method bewley lattice diagram method for calculating the variation of voltage at any point in cables or long lines at any time. V kamaraju obtained his ph d in high voltage engineering from the indian. Practical skills having successfully completed the module, you will be able to. Obtain the expression of reflection and transmission of travelling waves at transition points.
Construct the bewley lattice diagram and obtain the value of the voltage at the receivingend after a long time. Hours per semester weighted lh ph th ch wtm wem wcm cu. Transient and traveling waves, effects of line terminations, junction of several lines, bewley lattice diagram, traveling wave in transformer and generator. Several techniques have been developed for transient analysis. It is a useful aid to keep track of travelling voltage wave or current wave as it reflects back and forth from the ends of the line. Pdf high voltage engineering second edition mcgrawhill. For more information on travelingwave fault locating, see the technical paper locating faults by the traveling waves they launch, available at.
Lines open circuited and short circuited at the other end are also considered. A method to analyze traveling waves developed by bewley is described here in detail as it provides deep understanding of the phenomena and their effects. It presents the derivation and the solution to wave equations, lattice diagram and the event that occurs at the junction of. This paper presents an extensive literature survey of previous publications in which bewley s lattice diagram has been used for study of electromagnetic transients, fault location in distributed systems, calculation of transient fault currents n. Transient recovery voltages trvs for highvoltage circuit breakers part 1 denis dufournet chair cigre wg a3. Uniqueness of traveling waves for a twodimensional bistable periodic lattice dynamical system wu, chinchin, abstract and applied analysis, 2012. Name the different types of tests conducted on high voltage apparatus. Electrical breakdown in gases, solids and liquids 10 gaseous breakdown in uniform and nonuniform fields corona discharges vacuum.
High speed fault clearance is an efficacious method of incrementing power transfer and amending the transient stability of a potency system2,3. Ee 2353 high voltage engineering page 3 of 186 sce electrical and electronics engineering ee 2353 high voltage engineering l t p c 3 0 0 3 aim to expose the students to various types of over voltage transients in power system and its effect on power system. Now, the increment of the voltage at the receiving end due to any reflection is twice the amplitude of the incident wave, because of the reflection without change of sign. The method provides a very simple representation for voltage and current surge reflections as it travels along the transmission system. Total potential at any point is the superposition of all the waves arrived at that point. Normally, in high voltage testing, the currents are limited to a small value up to about 1 a under ac or dc voltages and a few amperes under impulse voltages 1. High speed digital protection of ehv line using travelling waves.
Traveling wave theory twt the transmission line conductors have resistances. Existence of traveling wave solutions in a stage structured cooperative system on higherdimensional lattices li, kun, rocky mountain journal of mathematics, 2019. High voltage engineering important questions download pdf high voltage engineering notes 1 download pdf high voltage engineering notes download pdf high voltage engineering nov dec 2016 question paper download anna university notes android app high voltage engineering start reading online. Transmission line theory, reflections, and lattice diagrams. Ee 2353 high voltage engineering page 1 of 186 sce electrical and electronics engineering a course material on ee 2353 high voltage engineering by mr. The fdtd method for lightning surge propagation in 115kv. Innovations in power line fault locating using line. Kamaraju, high voltage engineering, tata mcgrawhill, 4th edition, 2009.
Abdullah, high voltage engineering, pergamon press, oxford, 1970. On the transient response and the frequency analysis of. Mar 01, 2016 bewleys lattice diagram rajkumar kuppapillai. Amitava dasgupta, department of electrical engineering,iit madras. As a result, the calculation showed that the fdtd method is one of accurate methods to analyze transient lightning surge wave in power transmission lines. Diodes and transistors university of california, berkeley. The results show relatively lower voltage magnitudes and high current values around 1. Behavior of traveling waves at the junction of an overhead line and cable is presented. Electric power transmission system engineering analysis and. Testing of transformers, surge diverter radio interference measurements. This is a graphical representation of the timespace relation,which shows the position and direction of motion at.
Designed for seniorlevel undergraduate and beginninglevel graduate students, the book serves as a text for a twosemester course or, by judicious selection, the. Do you know any websites or links regarding bewley lattice diagram. Gaxiola cern, geneva, switzerland abstract highvoltage engineering covers the application, the useful use and proper working of high voltages and high elds. It presents the derivation and the solution to wave equations, lattice diagram and the event that occurs at the. Localization of faults on power transmission lines using. The voltage at a given point in time and distance is found by adding all terms that are directly above that point. Draw the voltage bewley lattice diagram for t between 0 and 0. Simulation of lightning surge propagation in transmission. The analysis of travelling waves on power system transmission. High voltage engineering j r lucas, 2001 eliminating dx gives us the partial differential equations differentiating equation 1 with respect to x, and equation 2 with respect to t, and eliminating i, we have a very similar partial differential equation can be obtained for i.
Rao, elements of engineering electromagnetics, chap. Bewley lattice diagram important short questions and answers. Lecture series on digital integrated circuits by dr. The lines with surge impedances z 1, z 2, and z 3 are connected on either side of the junctions. In the bewley lattice diagram, the following properties exist. Rework example 1 with z r 4z c and z g z c 3 example 1 singlephase losslessline transients. Power systems development and high voltage engineering. The analysis of travelling waves on power system transmission lines a thesis presented for the degree of doctor of philosophy in electrical engineering in the university of canterbury, christchurch, new zealand. The filter properties of this circuit were first developed using image impedance concepts, but later the more general techniques of. Traveling wave, lightning surge, bewley lattice diagram, telegraphists equations.
The objective of this book is to present methods of power system analysis and design, particularly with the aid of a personal computer, in sufficient depth to give the student the basic theory at the undergraduate level. Draw the bewley lattice diagram and obtain the voltage at b for the first 300 ps after the original surge arrives at b. High voltage engineering question bank 2 download pdf high voltage engineering question bank download pdf high. Zaengel, high voltage engineering fundamentals, pergamon. Assess the lifetime of insulation based on accelarated ageing tests. The effects of the environment such as lightning on the overhead power lines necessitated research and development, leading to the discipline of high voltage engineering that forms the basis of this book.
New course has five stages and it is under the section iesl college of engineering. Analysis and design is devoted to the exploration and explanation of modern power transmission engineering theory and practice. Draw the bewley lattice diagram for problem 1, and plot v l 3, t versus time t for 0. No detectable high frequency transient at line terminal when fault inception angle is zero. Coaxial cables have a property known as surge impedance or, more commonly, characteristic impedance, which is related to the capacitance and inductance, per unit length, of the cable. Explain the reasons for conducting wet tests on high voltage apparatus and give the specifications of the water used for wet tests.
Iesl part 3 engineering courseelectrical engineering 301. Simulation of bewleys lattice diagram using matlab ieee. Position of any wave at any time can be deduced directly from the diagram. Suspension insulators are used in the transmission and distribution system to provide electrical separation, between high voltage and ground structure, and support the. The lattice diagram determines the voltage at a given point and time in a. The length of the lines and cables are represented as their travel times. High voltage direct current circuit breakers are mentioned. Effect of natural impedance as terminal impedance is dealt with. A symmetrical lattice is a twoport electrical wave filter in which diagonallycrossed shunt elements are present a configuration which sets it apart from ladder networks.
Give the indian standard reference atmospheric conditions for high voltage testing. Bewley s lattice diagram is a graphical method that has been widely used for determining value of a wave in transient analysis. Introduction lightning and switching surge are any disturbance on a transmission of steadystate condition. Construct the bewley lattice diagram and obtain the value of the voltage at the. The characteristic impedance is most easily thought of in terms of the effect on. David large, james farmer, in broadband cable access networks, 2009. High voltage engineering government college of engineering. Pdf simulation of bewleys lattice diagram using matlab. Objectives to understand the various types of over voltages in power system and protection methods.
High voltage insulation engineering by ravindra arora, wolfgang mosch, new age. Scheme of instruction and syllabi of university college of. This is a convenient diagram devised by bewley, which shows at a glance. These phenomena can produce high voltage level in a very short time that can damage insulation or can cause server flashover. Unit ii electrical breakdown in gases, solids and liquids 10 gaseous breakdown in uniform and nonuniform fields corona discharges vacuum breakdown. Frank heleniak schweitzer engineering laboratories, inc. Aug 31, 2019 preface power system analysis and design. One topic covered is transmission line theory, reflections, and lattice diagrams. High voltage engineering unit i over voltages in electrical power systems causes of over voltages and its effects on power system lightning, switching surges and temporary over voltages protection against over voltages bewleys lattice diagram. Three of them are detailed in this chapter, namely. High voltage engineering over voltages in electrical.