Study of gas insulated substation and its comparison with. Gas insulated substation ppt pdf presentation 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. The complete drive unit is strictly separated from the. Sf6 equipment maintenance, repair, and replacement and. Preventive maintenance of substation equipment and. Recent technological developments have had a tremendous impact on all aspects of substation design and operation. Gas insulated substation market industry analysis, share.
With the widely used of gas insulated substation, especially for ultrahigh voltage level, very fast transient overvoltage generated by switching operations has caused more and more attention. Medium voltage gasinsulated switchgear up to 24 kv schneider. In this type of switchgear, all the necessary components of switchgear can be assembled in very limited space. A gas insulated substationgis is a substation that uses a superior dielectric gas, sulfur hexafluoride sf6,high voltage. Lsis gis has been developed toward the design concept for man free, repair free and maintenance free. Sf6 analysis for ais, gis and mts condition assessment. The portfolio includes gis solutions from 60 to 800 kv, along with secondary products to maximize switchgear and network operation. Pdfformat or scanned version have the status for information only. Lightening arresters, earthing of equipment and fencing is done for this purpose. Gas insulated substation pdf ebook market gas insulated substation downloads at substation design manual. There are five major considerations in the differences between the two high voltage substations. Cities most reliable compared to air insulated substations.
The present invention relates to a device for monitoring a gas insulated highvoltage substation by measuring partial discharges, including an enclosure 11. Gasinsulated highvoltage switchgear gis is a compact metal encapsulated. Handbook on maintenance of electrical general services. The clearance required for phase to phase and phase to ground for all equipment is much lower than that required in an air insulated substation. Strict quality control and environmentfriendly products. Gis there are two terms presented in iec gas insulated switchgear and ieee gas insulated substations.
Presented paper refers to service continuity of gasinsulated substations, a topic which is also dealt in annex f of iec international standard no. They will compare substation safety and security using ais vs. The metalenclosed gas insulated switchgear is made as to ensure the best possible relationship between design, used materials, maintenance effort and maintenance intervals. Ges f35 gis is a fieldproven solution with high availability that meets the challenges of networks up to 170 kv for power generation, transmission, distribution, tertiary and heavy industry applications. We upgrade existing facilities and work with your experts to install stateoftheart equipment. An overview on gis gas insulated substation engineering ieee foothill society pes chapter and ieee pes student chapter, cal poly pomona are pleased to sponsor a talk on the topic, an overview of gis substation engineering, by mr. Apr 30, 2018 hello, this video is for comparing of gas insulated substation gis vs air insulated substation ais for urban and rural areas with discussion of each individual substation component. Economics between conventional and gas insulated substation.
A gas insulated substation gis is a high voltage substation in which the major structures are contained in a sealed environment with sulfur hexafluoride gas as the insulating medium. Sf6 gas without any influence of ambient environment. Gas insulated substation free download as powerpoint presentation. Over the years new generations of gis have been devel. Lsis who has been a leader in electricity and automation. The main advantage of gas insulated substation gis is its high reliability and also compactness which has direct influence on land requirement, land cost, environmental considerations, etc.
In air insulated substations clearance required is more due to poor dielectric strength of the air. Our electrical substation construction and maintenance division is a full service substation contractor specializing in all aspects of 4kv to 500kv substation construction from turnkey greenfield construction to retrofit work. An overview on gis gas insulated substation engineering. Gas insulated substation definitions and basics course no. Service experience cbbayyears number of major failures maf number of minor failures mif all data 88948 326 1505 without countries 14 and 23 7158 102 970. Comparison of gis and ais systems for urban supply networks. Lsis has been a leader of development of industry and best partner to improve. Gas insulated substation gis vs air insulated substation. Hello, this video is for comparing of gas insulated substation gis vs air insulated substation ais for urban and rural areas with discussion of each individual substation component. Gasinsulated switchgear up to 245 kv, 50 ka, 4000 a type 8dn9.
Retrofitting and maintenance keep fit longer economical english pdf. Safety and protection of equipment as well as working personnel is also a considerable factor. Lsis is producing gis, which is one of the major equipment used in the high voltage substation in densely cities. Limited sf 6handling instruction detailed explained sf 6handling instruction and regulations sf 6 maintenance units with a minimum sf recovering pressure of 50 100. Presented paper refers to service continuity of gas insulated substations, a topic which is also dealt in annex f of iec international standard no. Jan 31, 2008 gas insulated substations provides a comprehensive coverage of a wide range of topics which include. The speakers will discuss reliability and system planning implications for gas insulated substations. Lsis who has been a leader in electricity and automation in. Hence, most preferred where area for substation is small eg. Limited sf 6handling instruction detailed explained sf 6handling instruction and regulations sf 6maintenance units with a minimum sf recovering pressure of 50 100. Pdf electric power substations engineering by john d.
Gis highvoltage gas insulated switchgear substations. Maintenance philosophy tbm definition the criteria for timebased maintenance are aging of material based on environmental conditions of installation cbm definition cbm is to maintain the correct equipment at the right time. Occupies very less space 110th compared to ordinary substations. Mcdonald the use of electric power substations in generation, transmission, and distribution remains one of the most challenging and exciting areas of electric power engineering. Stepping down the voltage from transmission to the distribution level at the substations located near the actual consumers not only yields economic advantages, but also. A gas insulated substation gis is a substation that uses a superior dielectric gas, sulfur hexafluoride sf6, highvoltage. Gis is a kind of metal enclosed switchgear that means, all the equipments of the electrical switchgear are enclosed by gas tight metal enclosure and sf 6 gas is used as. This is a project decision when the gis substation that was built in the early 1970s approaches the end of its useful life national grid begins. Practical and theoretical aspects are handled by acknowledged gis experts who have been involved with the technology from the start. The increase in demand for electricity and the growing energy density in metropolitan cities have made it necessary to extend the existing high voltage network right up to the consumer. Gas insulated switchgear is used in industrial areas to fulfil highenergy demands by space. Can be assembled at workshop and modules can be commissioned in the plant easily. Combined with a significantly reduced footprint and sf6 gas insulation, toshiba gis can operate in unconventional indoor spaces while maintaining its.
The cymgrd software is a substation grounding grid design and analysis program specially developed to help engineers optimize the design of new grids and reinforce existing grids, of any shape, by virtue of easy to use, builtin danger point evaluation facilities. Gas insulated substations provides a comprehensive coverage of a wide range of topics which include. This course is based on terms used in ieee and iec regulations. Substations play a crucial role in electricity distribution infrastructures as a part of the transmission and distribution systems, performing several core functions such as the transformation of voltage from high to low, or vice versa. Is that the highvoltage current carrying parts are within a metal enclosure and are held in a concentric configuration by cast epoxy spacer insulators. Handbook on maintenance of electrical general services substation photo credit.
Gas insulated substations conference 2018 in washington dc. Practical and theoretical aspects are handled by acknowledged gis experts who have been involved with the technology from the. Home download center electrical engineering books and technical guides power substation guides operation and commissioning of 3311 kv power substation 33 kv switching substation this thesis report is prepared in according to the operation and maintenance procedure of 3311kv substation, including emergency maintenance work. Ge provides a full range of gas insulated substations gis for utilities and industries worldwide. Operation and maintenance of a gas insulated substation.
With cbm you can exchange just the components or parts that have been subjected to the. A typical gas insulated substation is shown in fig. This problem can be solved by using gas insulated switchgear technology. Installation, maintenance, and end of life of a gasinsulated. Operation and commissioning of 3311 kv power substation eep.
Gas insulated switchgear is used in industrial areas to fulfil highenergy demands by space saving design with a minimum of cost. Gas insulated substation design manual free download gas insulated substation design manual pdf pdf manuals library gas insulated. Gas insulated substations transmission distribution. The initial equipment cost of gis is usually higher than that of conventional air insulated substation ais. Gas insulated substations high system reliability highflexibilityofitssolutionsmodularityexpandability gas insulated 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. The present invention relates to a device for monitoring a gasinsulated highvoltage substation by measuring partial discharges, including an enclosure 11. This book provides an overview on the particular development steps of gas insulated highvoltage switchgear, and is based on the information given with the. With gis the footprint of substations can be reduced by about 60 percent, by housing all primary conductors within earthed sf 6 gasinsulated aluminum tubes. Gas insulated substations gis reliability results participation in the survey 20042007.
Gas insulated substation transformer electrical substation. Gas insulated substations is an allinclusive reference guide to gas insulated substations gis which takes account of its basic principles, technology, application, design specification, testing and ownership issues. Short maintenance intervals frequent opening of gas compartments 2 openings during life time. The maintenance paragraphs give real life experiences from existing gis technology. If the switchgear is sold to new owners, they must receive this document along with the. Electrical general services substation is a distribution substation from which electric supply is distributed to the different users. Roller bearings and the maintenance free spring mechanism ensure decades of reliable. Scribd is the worlds largest social reading and publishing site. Stepping down the voltage from transmission to the distribution level at the substations located near the actual consumers not only yields economic advantages, but also ensures reliable power supply. Tom antonucci for the benefit of ieee, particularly the student members, with an interest to power systems. Especially, lsis gis adopts the hydraulic operating method, it is not necessary to do periodic inspections as air compressor type does. Several crucial terms are for better understanding of the presented material. The differences between air insulated substation engineering and gas insulated substation engineering are vast. Insulated substation at the brayton point generating station in somerest, mass, with a new indoor facility he mentioned that the project will reduce future emission of sf6 gas into the environment.
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. The metalenclosed gasinsulated switchgear is made as to ensure the best possible relationship between design, used materials, maintenance effort and maintenance intervals. Oversees the maintenance, repair and oversees the purchase and storage of ltfsf6 it sf6 replacemen t of sf6 gas equipmen. Think you know what a gas insulated substation gis is. The high voltage conductors, circuit breaker interrupters, switches, current transformers, and voltage transformers are in sf6 gas inside grounded metal enclosures.
With gis experience spanning 50 years across a wide range of industries and applications, ge is a leader in the. Download electric power substations engineering by john d. Hence the overall size of each equipment and the complete substation can be reduced to as. These instructions for assembly are an integral part of the product and must be stored so that they are at any time readily accessible for and can be used by persons who are to work on the switchgear. Urban supply systems combining gis technology and hv cable are safe, reliable and environmentally benign. Medium voltage switchgear gasinsulated switchgear up to 36 kv. Number of outages due to the fault is less maintenance free. Gas insulated shunt reactor features suitable for installation excellent history of reliability and safety fine radial core circular yoke and circular tank low loss easy maintenance manufacturing range voltage. Ge provides a full range of gasinsulated substations gis for utilities and industries worldwide. The capacity of eot crane shall be decided based on lifting of heaviest parts of gis equipmentaccessories for erection and future maintenance purpose.
A gas insulated substation gis uses a superior dielectric gas, sf6, at moderate pressure for phasetophase and phasetoground insulation. In a substation there are numbers of incoming and outgoing circuits each having its isolator, circuit breaker, transformers etc. Installation, maintenance, and end of life of a gas. Study of gas insulated substation and its comparison with air. Gas insulated substation electrical substation scribd. In 1965 abb delivered the worlds first substation with gasinsulated switchgear gis. A gas insulated substation gis is a substation that uses a superior dielectric gas, sulfur hexafluoride sf6,high voltage.
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