Maintenance can be required at any time during the life of a transmission line conductor. Wind and environmental effects on overhead high voltage transmission lines a. Conductor galloping, based on epri research project 792. Wind induced conductor motion the orange book, and compact line design the blue book designed the vibration control solution for the longest rivercrossing span in the u. Wind induced conductor motion, project 792, palo alto, ca, 2006. Updating the epri transmission line reference book. Electric power research institute epri epri transmission line reference book wind induced conductor motion. Conductor galloping and a new theory for overhead bundle transmission lines. Overhead transmission inspection and assessment guidelines. Based on laboratory measurements, the technique is easy to use and keeps test execution time to a minimum. Transmission line conductor cables have its fatigue lives affected by the combined action of fatigue and fretting effects, mainly at restriction points such suspension clamps and dampers. Wind induced conductor motion, an epri transmission line reference book, epri project 792, 1979. Reliability for a transmission line is defined as its ability to operate uninterrupted, safe and over a long period in a wide range of meteorological conditions. Olive book hvdc transmission reference book 2010 2.
Statistical methods applied to aeolian vibrations of. Aluminum electrical conductor handbook, third edition, aluminum association, 1989. Figures and tables should be located at top or bottom of either column. With regard to the computational modelling of gusty wind transmission line conductor interactions, a refined computational model of the conductor in the surrounding moving air is used to investigate the dynamic interaction between the wind and the conductor motion keyhan et al. Epri ac transmission line reference book 200 kv and above, third edition. A novel model is developed for a vibrating single conductor transmission line carrying stockbridge dampers. Pdf updating the epri transmission line reference book.
The use of short spans for control of wind induced phase conductor motion tends. Lead author of two epri transmission line reference books. Wind and environmental effects on overhead high voltage. Distribution substation an overview sciencedirect topics. The orange book reworked by an international team of experts, this new edition provides an essential. He has published numerous papers in professional journals and was part of the authors team of the epri transmission line reference book. To provide for greater freedom of motion, the weights may be partially slotted in the. Design codes, standards, and manuals used in power line.
By john chan, dave havard, chuck rawlins, giorgio diana, louis cloutier, jeanlouis lilien, claude hardy, jeff wang and anand goel. Mechanism and characteristic of raininduced vibration on. State of the art of conductor galloping a complementary document to transmission line reference book wind induced conductor motion chapter 4. Wind induced vibrations of long electrical overhead. On the vibration analysis of power lines with moving. This site is like a library, you could find million book here by using search box in the header. In many cases, this buildup is uniform along the length of the conductor figure 6b. Wind induced vibrations of long electrical overhead transmission line spans. Epri ac transmission line reference book200 kv and. Experiments are performed to determine the equivalent viscous damping of the damper.
Wind induced conductor motion the orange book, and compact line design the blue book. To reveal the mechanism of rain wind induced vibration of bundled conductors, a series of. Lines damaged by vibration may have to be derated or even taken out of service until repairs can be made. Claren 1979 cigre international congress on large high voltage electric systems. It has been estimated that as high as 10% of the electrical energy generated, transmitted, and distributed could be lost in some line conductor. Preformed line products plp introduced air flow spoilers in the early 1980s as a means to mitigate galloping of conductors. Free vibration analysis of a single conductor with a stockbridg damper jun 2011. Following is a summary and comparison of aeolian, gallop, and wakeinduced oscillation, reproduced from epri transmission line reference book, windinduced conductor motion, based on epri research project 792.
Semiactive control of forced oscillations in power. In this paper, the authors extend this application through introducing two scenarios of energy harvesting from train induced wind. When a freezing rain or snow event occurs, there is snow or ice buildup on the conductor. A stockbridge damper is a tuned mass damper used to suppress wind induced vibrations on slender structures such as overhead power lines and long cantilevered signs. Analyses of the vibration level of an opgw at the catenary. A trackborne energy transducer is a smart device for harvesting energy of trains or rail transportation systems. Zoklot2 1electrical power and machines engineering department, zagazig university, egypt 2mechanical power engineering department, zagazig university, egypt abstract. The dumbbellshaped device consists of two masses at the ends of a short length of cable or flexible rod, which is clamped at its middle to the main cable.
Effect of ice and snow on the dynamics oftransmission line. Mechanics of overhead electrical conductors under wind excitation is a complex problem. Nov 22, 2012 piezoelectric energy harvesting has been 1 transmission line reference book, wind induced conductor motion, electric power research institute, 1979. Finally the conclusion is summarized about the natural vibration characteristics and wind induced response properties of the nonfully symmetric geiger cable dome. Epri transmission line reference bookwindinduced conductor motion. The damper is designed to dissipate the energy of oscillations in the main. Control of windinduced vibration of transmission towerline. Under the certain rain wind conditions, bundled conductors exhibit a rain wind induced largeamplitude vibration. The time series analysis is based on a quasistatic assumption.
The wind flow induces aerodynamic forces on a conductor causing hazardous vibrations that impair the reliability and lifetime of a power line. The highvoltage power transmission tower line system, which is a high flexible structure, is very susceptible to the wind induced vibrations. First five natural mode shapes of the transmission line conductor. Green book underground transmission systems reference book 4. Google scholar gasic, v, zrnic, n, obradovic, a 2011 consideration of moving oscillator problem in dynamic responses of bridge cranes. Energy harvesting of trackborne transducers by traininduced. Large amplitude vibrations of longspan transmission lines. Finite element modeling of cable galloping vibrations. Rawlinsepri transmission line reference book, chapter 4, wind induced conductor motion.
Both ac and dc transmission line conductors have associated line resistance which creates conductor voltage drops with corresponding power losses. The wind induced response analysis of the nonfully symmetric geiger cable dome is carried out by newmark method. Orange book chapter 4 institute of electrical and electronics engineers, inc. Sagtension calculation methods for overhead lines, cigre brochure 324, task force b2. Ac transmission line reference book 200 kv and above. It also allows measurement of the relative performance of nonlinear dampers for which it is difficult to derive the analytical expression for their mechanical. In my bussiness we have the ac transmission line reference book 200 kv 3rd edition epri and transmission line reference book 345 kv and above epri 1982 are good. Simplified vibration model and analysis of a single. Following is a summary and comparison of aeolian, gallop, and wakeinduced oscillation, reproduced from epri transmission line reference book, wind induced conductor motion, based on epri. Windinduced conductor motion, the orange book, which was last issued in 1979. Wang is one of the lead authors of two wellknown epri transmission line reference books. Rainfall cause the formation of the droplets on the conductor, and the droplets take a cone shape by electric field.
Wind induced conductor motion, the orange book, which was last issued in 1979. For estimating the vortex excited vibrations of overhead transmission lines, the energy balance principle ebp is well established for spans damped near the ends. Special attention should be paid to all types of conductor vibrations when designing a power line to keep adverse drawbacks at a minimum. The study is mainly discussed as in terms of the effects of the coupling motion between a steel tower and conductors. A stockbridge damper is a tuned mass damper used to suppress windinduced vibrations on slender structures such as overhead power lines. This type of vibration can cause the fatigue fractures of conductors and fatigue failures of spacers, which threaten the safety operation and serviceability of highvoltage transmission line. An analysis of the lightning performance of compact lines. In the computational model, wind load time histories are.
This paper describes results of a fullscale measurements and a time series analysis for the wind induced vibration of a transmission line system. One of the major challenges faced by electric utilities and. Google scholar foti, f, martinelli, l 2015 finite element modelling of cable galloping vibrations. Sensitivity of wind induced dynamic response of a transmission line to variations in wind speed saif haddadin m. Epri transmission line reference book wind induced conductor motion. Best practice in transmission and distribution in a changing environment.
Conductor galloping basics preformed line products. Based on a revised analytical model recently developed for stationary downburst and harmonic superposition method, transient threedimensional wind fields of downbursts were successfully simulated. Developed by an international team of experts, new book presents an updated stateoftheart reference guide to conductor motion. Natural vibration and windinduced response analysis of the.
Yellow book overhead transmission inspection and assessment guidelines. The red book extensively updated and expanded including software, epri s flagship reference provides a muchneeded tool to support the costeffective design of safe, reliable, and highperformance transmission. Wecc standard fac501wecc1 transmission maintenance pdf ieee standards association. Computational analysis of aeolian conductor vibration. He is also coauthor of the epri transmission line reference book wind induced conductor motion.
Rational damping arrangement design for transmission lines. He has consulted extensively for electric utilities, engineering consulting firms, and conductor and fitting manufacturers in north america and asia. Publication of this new edition is the culmination of three years of research by an international team of experts in the field. Asceasme journal of risk and uncertainty in engineering systems, part b. Vibration damages cause fatigue failures of aluminum strands at splices, clamps, and dampers. I would like to know if epri red book 3rd edition is worth having a look at because i have seen that it has a huge price.
State of the art of conductor galloping a complementary document to transmission line reference book windinduced conductor motion chapter 4. Aeolian vibration basics october 20 part of a series of reference reports prepared by. Epri has published a new, updated edition of the longtime industry standard on vibration, epri transmission line reference book. Rawlins cb, hard ar, ikegami r, doocy es 1979 transmission line reference book windinduced conductor motion. Free vibration analysis of a single conductor with a stockbridg damper jul 2011. Aeolian vibration basics enml10074 preformed line products.
Sweep technique to measure the relative performance of. Of all the wind induced motions of overhead transmission line conductors or other suspended cables, galloping is the. Failure analysis of wirebreaks in aluminum conductor. Wind induced aeolian vibrations of conductors and overhead shield wires ohsw on transmission and distribution lines can produce damage that will negatively impact the reliability or serviceability of these lines. Electric power research, institute epri 2008 transmission line reference book. Simplified vibration model and analysis of a singleconductor. The book has been reworked by an international team of experts to provide.
This paper proposes the utilization of the internal resonance feature of the spring pendulum to reduce the wind induced vibration of a transmission tower. Reworked by an international team of experts, this new edition. Failure analysis of aluminum wires in all aluminum alloy. The sweep technique described in this paper represents a new method for measuring the relative performance of different dampers. Effect of motion path of downburst on wind induced. A complementary document to transmission line reference book windinduced conductor motion. Windinduced coupling vibration effects of highvoltage. The orange book reworked by an international team of experts, this new edition provides an essential resource for all utilities involved in transmission line design and maintenance.
A computational fluid dynamics cfd model considering trackborne energy transducer is constructed and simulated. Three main groups may be distinguished, so far as vibration. The response of overhead line conductors to vortex shedding under laminar and turbulent flow. Windinduced conductor motion orange book, epri, palo alto. Candidate, western university, canada haitham aboshosha research engineer, the boundary layer wind tunnel laboratory, western university, canada ayman m. Modeling and mechanism of rainwind induced vibration of. Windinduced coupling vibration effects of highvoltage transmission towerline systems article pdf available in shock and vibration 20174.
1652 903 1290 761 636 230 47 667 507 1152 1062 1611 407 120 1563 1118 1566 9 1121 1497 1349 539 1528 1446 313 1106 1142 506 64 862 460 811 1401 32 70 87