In particular, we design a 15tw, 10ma, 100ns doubledisk transmission line. Gasinsulated transmission lines gil is an established high voltage technology used when environmental or. Xdge is one of the most reliable gas insulated switchgear suppliers with. Gas insulated transmission lines gil electric power transmission. Gas insulated medium voltage switchgear industrial solutions.
Find powerpoint presentations and slides using the power of, find free presentations research about transmission lines ppt. Gas insulated transmission linessuccessful underground. Gil consists of tubular aluminium conductors encased in a metallic tube that is filled with a mixture of sulphur hexafluoride and nitrogen gases for electrical insulation. Many papers have been published on the theory of magnetic insulation and the use of z flow analysis of magnetically insulated transmission lines mitls. Relay selection for cooperative mac considering retransmission overhead. Hon tat hui transmission lines basic theories nusece ee2011 28 example 1 a 100.
In an overhead configuration gil are subject to climatic factors that affect their transmission, which is determined by the thermal regime. Urban power supply using sf6 technology, life cycle. Overhead line work involving linesman on elevated poles or transmission lines. Gasinsulated transmission lines gil have already proven their technical reliability for a number of decades, since they offer outstanding safety in operation and even in the event of failure, in addition to their very good transmission performance. Gas insulated transmission lines successful underground. Thus, the design of a gas insulated transmission line is an optimization of the dielectric, ampacity and material costs. The 2nd generation gil is insulated with n 2sf 6 gas mixtures and the design and laying technique is primary dedicated to long distance transmission.
In short lines, where series reactance x is relatively small, the. A transmission system comprises of gas transmission pipelines, compressors stations, mixing stations and custody transfer metering stations along the pipelines and terminals supervisory control and data acquisition scada the pipelines may be a common carrier open access or a contract carrier merchant pipeline. Schneider electric will help you to install efficient, reliable and secured solutions. Gil offers several advantages for high capacity power transmission, as listed below. Any of these limits can be more or less important in different circumstances.
The insulators for overhead lines provide insulation to the power conductor from ground. Proposed scheme of pliable gas insulated transmission line. A presentation on loss less transmission by gas insulated transmission line by. Over head transmission lines are not just a simple copper wire but it is actually a combination of aluminium and steel i. The gas insulated transmission line gil is a system for the transmission of electricity at high power ratings over long distances. It is expected that asia pacific will dominate in the global gas insulated transmission lines market throughout the forecast period owing to increasing high voltage projects followed by europe and north america. Carry lower voltage electricity that is still powerful enough to cause injury or death. Gas insulated transmission lines successful underground bulk power transmission for more than 30 years g. Gas insulated substation free download as powerpoint presentation. Gasinsulated transmission lines gil are the safe and flexible alternative to overhead lines and take up much less space. More concrete user benefits and solutions for intelligent, digitally controlled power transmission and distribution. The gas insulated transmission line gil is a technology developed for the needs of the 21st century, where huge metropolitan areas need an electrical supply for the public and industry.
A large part of a gil lies above the earths surface. Overhead line insulators powerpoint ppt presentation. Gas insulated switchgear completely eliminates this possibility throughout the. Insulated transmission lines gil wiley online books. The entire system will work at 380 kv service voltage.
High voltage underground cables for power transmission have been in use for many years and number of different technologies have developed over the years. Gas insulated transmission line can be used in the voltage range of 245 to 550 kv with the current capacity up to 4. With an overview on the technical, economical and environmental impact and power system implications of gil, this guide provides a complete understanding of its. Deliver electricity to neighborhoods and communities over a shorter distance than transmission lines. Assemblies of hv devices and gil gas insulated lines.
Spare phase concept up to now, for ehv transmission systems of power utilities often the n1 principle has been used for planning purposes 1, both for planning in network. This seminar download only contents ppt 270720140225gasinsulatedsubstations. Gas insulated transmission lines market global industry. The gil is a today available and future orientated technical solution. Pdf gas insulated transmission lines in railway galleries. Gasinsulated transmission line gil system design on photo tunnellaid gil by siemens the conductor rests on cast resin insulators, which center it within the outer enclosure. Are the final stage of electricity delivery to homes and businesses. Apart from other benefits during construction and operation.
Gasinsulated transmission lines gil are used for highpower extraction from electric power plants and high power delivery to large cities and industrial centers. It is required to regularly check the transmission cooler lines, dipstick tube oring, transmission. Are generally supported by wooden poles and not as high as transmission lines. Transmission lines powerpoint template, backgrounds. When any object is said to be insulated, it is understood to be insulated in a manner suitable for the conditions to which it is subjected.
Gasinsulated substations high system reliability highflexibilityofitssolutionsmodularityexpandability gasinsulated substations high flexibility of its solutions modularity, expandability compact space saving solutions innovative solutions devices, switchgears low life cycle costs reliable and competent partners operator, manufacturer. Gil is the system used for the transmission of hv electricity for long distance and is the flexible and safe alternative to overhead lines. Hv gasinsulated transmission lines for rated voltages of 72. Both, the gis located in the cavern and the underground section of the outgoing line are typical applications for gas insulated power transmission installations. Gasinsulated transmission lines consist of two concentric aluminum tubes. Gas insulated transmission lines in underground tunnels can be very viable option in future, as the land above the tunnel can be fully restored for agricultural use. The gasinsulated transmission line gil is a system for the transmission of electricity at high power ratings over long distances. We describe herein a novel design process using the circuit code screamer for a realworld mitl for zpinch loads based on the z flow model of magnetic insulation. Know the possible transmission fluid leak spots in a car the transmission fluid is an important component for the shifting of gears as well as the steering wheel. The main technical data of the gil used in 420 kv and 550 kv transmission network have been discussed. In cases where overhead lines are not possible, the gil is a viable technical solution to bring the power transmitted by an overhead line underground without a reduction of power transmission capacity. The industry jargon for pipelines vary with respect to the oil and gas sectors viz upstream, midstream and downstream. View and download powerpoint presentations on transmission lines ppt.
Gas insulated transmission lines gil are a means of bulk electric power transmission at extra high voltage. Scribd is the worlds largest social reading and publishing site. The gasinsulated transmission line gil has been optimised for the needs of the 21st century, where highpower transmission lines are needed and overhead lines are often not suitable. China water power press china hydropower engineering consulting group northwest survey and design institute of hydropower engineering monograph series. This enclosure is formed by a sturdy aluminum tube, which provides a solid mechanical and. In this case, the land above the gil is usually still viable for agricultural use. Gas insulated switchgear is used in industrial areas to fulfil highenergy demands by space saving design with a.
Gil system first installation in black forest as long ago as 1975 of about 4km. Gas insulated transmission lines gils are being used in electrical systems regarding power transmission and substation interconnection. Ppt overhead line insulators powerpoint presentation. How high is the mac maximum allowable working environment. What is gil gas insulated transmission lines gil are a means for bulk power transmission at extra high voltage ehv.
In several responsibilities he was engaged in gas insulated technologies for hv circuit breaker, gasinsulated substations and transmission lines. Gas insulated line gas insulated line invented in 1965 by massachusetts institute of technology. Ppt transmission lines powerpoint presentation free to. However, operational complexities of conventional schemes, such as structural rigidity, corrosion protection, gas leakage in case of seismic vibrations, larger bending radius and jointing complexities which restrain their application perspectives, could be. Gas insulated transmission lines engineering design.
Material relied upon to insulate the conductor from other conductors or conducting parts or from ground note. The quality of our gas insulated switchgear is the result of a rigorous standard quality management system, which has been certified in accordance with iso 9001. Gil consists aluminium conductor surrounded by mixture of n2 and sf6 inside the enclosure. Gil consists of tubular aluminium conductors encased in a metallic tube that is filled with a mixture of nitrogen and sulphur hexafluoride gases for electrical insulation.
Gas insulated substations gis is a compact,multicomponent assembly enclosed in a ground metallic housing in which the primary insulating medium is compressed sulphur hexafluoride sf6 gas. Highvoltage power transmission energy siemens global. Gas insulated substation electrical substation transformer. Experiences with gas insulated transmission lines gil back in the 1960s, with the introduction of sulphurhexafluoride sf 6 as an insulating and a switching gas, the basis was found for the development of metalclad high voltage substations on the basis of these developments and good experience of the sf 6 insulated metalclad high voltage switchgear, the idea to use high voltage sf 6. Gas insulated transmission lines gil free download as pdf file. Fbx is a gasinsulated switchboard combining all medium voltage functions. Solid insulation cables have limits when it comes to the voltage that can be carried safely, and oil impregnated paper cable are also limited in the capacity. Gasinsulated transmission line gil ieee conference. Transmission distribution osha construction outreach course. Defects in insulator material air, gases, impurities flashover of insulator due to. In 1991 he started his business career with siemens in erlangen germany at the headquarters of the power transmission division.
Gas insulated transmission lines in railway galleries. Gas insulated transmission lines gil are a means of bulk electric power transmission at high and extra high voltage. Gasinsulated transmission lines gil is an established high voltage technology used when environmental or structural considerations restrict the use of overhead transmission lines. It is also possible to install gas insulated lines directly underground, without a tunnel. On the design of magnetically insulated transmission lines. Transmission lines are one of the safest and most effective ways of transporting crude oil, natural gas and petroleum products between border sharing nations and states. The quarter wave line provides impedance transformation upto the highest frequency at which the transmission lines are used. The quality system for the design and manufacture of circuit breakers has been. This paper deals with the recent developments in the application of gasinsulated transmission lines and their applications in the near future to solve power transmission shortages, mainly in metropolitan areas. A computer model of gil has been built using the electromagnetic transient program emtp to assess the suitability of.
Highvoltage direct current transmission systems hvdc grid access solutions. With an overview on the technical, economical and environmental impact and power system implications of gil, this guide provides a complete understanding of its physical design, features and advantages. Evaluation of gas insulated lines gil for long distance. The gasinsulated transmission lines gil of the second generation are now in services since more than 2 years, with very good service experiences. Natural resources of energy are often far away from metropolitan areas. Gasinsulated transmission lines null siemens india.
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