Gastightness essential for the functionality static and dynamic solutions design and material assure extreme low leakage rate functionality and environmental protection design and material assure. Ge provides a full range of gasinsulated substations gis for utilities and industries worldwide. This article is an introduction to gasinsulated substations. Gas insulated substation gis also called sf6 gas insulated metalclad switchgear is preferred for 12kv, 36kv, 72. Very fast transient over voltage vfto is a unique electromagnetic transient phenomenon occurring in gas insulated substation gis, which determines the insulation level of the gis above 330 kv. Details advanced and basic material, accessible for both existing gis users and those planning to adopt the technology. One of the advantages of gis over conventional substations are their compactness, which makes them a favorite for service in. 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. Operation of a gis substation involves the same principles as operati ng an. 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. Many substation delivery time in as little as six weeks after design approval rigorous. Several crucial terms are for better understanding of the presented material. A gis is the implementation, within a complete hv substation, of.
The station layout and equipment rating shall be based on the single line diagram and general layout enclosed. Gas insulated substation designs as an effective method to protect a substation george becker, senior substation engineer, power engineers. Gas insulated metalenclosed switchgear for rated voltages above 52 kv 092011 orequired leakage rate gas compartment. Substation structure design guide provides a comprehensive resource for the structural design of outdoor electrical substation structures. Gas insulated substations transmission distribution systems. The highvoltage conductor forms the primary winding. Pioneer and technology leader driving gis innovations. Gasinsulated highvoltage switchgear gis is a compact metal.
Over view components of gis specification of gis gis substation layout comparison with conventional substation. Guidelines for usage of air insulated substation ais or gas. Gasinsulated switchgear elk04 modular system up to 170 kv, 4000 a, 63 ka product brochure. Siemens is a leading supplier of engineering, equipment, solutions, and services for highvoltage substations, such as air insulated substations, gasinsulated substations, and gasinsulated lines. Several crucial terms are for better understanding of the presented. Three phase encapsulated type sf6 gas insulated switchgear. There are five major considerations in the differences between the two high voltage substations. Siemens provides a wide range of services including the supply of complete packages of highvoltage. Toshibas gas insulated substation gis is a compact and highly economical substation solution for electric utilities, commercial, and industrial applications in densely populated cities. The portfolio includes gis solutions from 60 to 800 kv, along with secondary products to maximize.
The metalenclosed gas insulated switchgear inherently follows the criteria for new substation design and offers a higher reliability and flexibility than other solutions. Gas insulated switchgear electrical substation electric arc. Gis there are two terms presented in iec gas insulated switchgear and. Sulphur hexaflouride sf6 gas the primary insulating medium. National grid substations technical specification ngts 2. Think you know what a gas insulated substation gis. Compact design ideal for space constrained projects in crowded.
An ais unit is basically a conventional switchgear technology where air is used. Gis, 145 kv and 170 kv lilo layout predesigned gasinsulated switchgear for. Hv and ehv gis application and design considerations. Study for optimal design of gas insulated substations gis. Jul 07, 2014 a onestop, complete reference text on gas insulated substations gis, largecapacity and longdistance electricity transmission, which are of increasing importance in the power industry today. Gis highvoltage gas insulated switchgear substations. The high voltage conductors, circuit breaker interrupters, switches, current transformers, and voltage transformers are in sf6 gas inside grounded metal enclosures. They will compare substation safety and security using ais vs. Introduction to gas insulated substations switchgears gis. Gas insulated substations gis have received great interest in the recent years. Gas insulated substation definitions and basics cedengineering. Gis technology originated in japan, where there was a substantial need to develop technology to make substations as compact as possible.
Abb substations with gasinsulated switchgear gis are unmatched when it comes to compactness, reliability, efficiency and safety, ensuring maximum power availability for utility, commercial and. The cost variation of the high voltage installation itself is relatively small and mainly influenced by the layout. The common gis high voltage ratings can be classified into four design parts or. As all other modules can be connected directly, by. Xdge is one of the most reliable gas insulated switchgear suppliers with. A major difference between conventional air insulated substations ais and the gas insulated substations gis is that the sf6 gas insulated. Major players in the sector over view what happens when a circuit breaker start opening under electrical fault. Riaz ahsan baig year of publication 2004 0 abstract the author in his paper has made comparison of. An ais unit is basically a conventional switchgear technology where air is used as a primary dielectric for insulation. Siemens is a leading supplier of engineering, equipment, solutions, and services for highvoltage substations, such as air insulated substations, gasinsulated. Riaz ahsan baig year of publication 2004 0 abstract the author in his paper has made comparison of gas insulated substation gis with conventional air insulated substation ais. A gas insulated substation gis uses a superior dielectric gas, sf6, at moderate pressure for phasetophase and phasetoground insulation.
This article is an introduction to gas insulated substations. Gasinsulated switchgear up to 550 kv, 63 ka, 5000 a type. 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. 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. It is applicable to both openterminal air insulated ais and metalenclosed gas insulated gis substation constructions and covers equipment operated at lower voltages on the same substation site.
Due to the gas enclosed design, gis is the most suitable solution for indoor and underground substations. India high voltage gasinsulated switchgear and hybrid switchgear, pass english pdf. Both ais and gis installations use circuit breakers, disconnect switches isolators, and earthing switches, and have different means of showing their status, either opened or closed. The speakers will discuss reliability and system planning implications for gas insulated substations.
The considerably larger variation for the complete. An effective although more costly form of switchgear is the gasinsulated switchgear gis, where the. This course is based on terms used in ieee and iec regulations. The portfolio includes gis solutions from 60 to 800 kv, along with secondary products to maximize switchgear and network operation. Three phase encapsulated type sf6 gas insulated switchgear type sdf for 170 kv 06b1e0001 gate city ohsaki, east tower, 112, osaki 1chome, shinagawaku, tokyo 1410032, japan. Design and material assure extreme low leakage rate functionality and environmental protection design and material assure extreme low leakage rate iec 62271203 highvoltage switchgear and controlgear part 203.
Distribution substation a distribution substation transfers power from the transmission system to the distribution system of an area. Gis there are two terms presented in iec gas insulated switchgear and ieee gas insulated substations. The two primary distribution feeders of the substation illustrated in figure 1 are protected by either power circuit breakers or automatic circuit reclosers. Gas insulated substation gis vs conventional outdoor substation ais by engr. Gas insulated highvoltage switchgear gis is a compact metal encapsulated switchgear consisting of highvoltage components such as circuitbreakers and disconnectors, which can be safely operated in confined spaces.
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. 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. Gas insulated substations provides a comprehensive coverage of a wide range of topics which include. Digital substation applications, benefits and technology testing and maintenance of digital substation experience from utilities digital substation implementation thomas schulz, manager north american gas insulated substations, abb 2. 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. A switchgear may be a simple openair isolator switch or it may be insulated by some other substance. Layout design according to land available to customers.
Prepared by the subcommittee on the design of substation structures of the committee on electrical transmission structures of the structural engineering institute of asce. According to the author gis are much more reliable, compact and maintenance free. High speed earthing switches are unique to gis design as they are not normally used. Layout the first step in planning a substation layout is the preparation of a oneline diagram which shows in simplified form the switching and protection arrangement required, as well as the incoming supply lines and outgoing feeders or transmission lines. 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. Gastightness essential for the functionality static and dynamic solutions design and material assure extreme low leakage rate functionality and environmental protection design and material assure extreme low leakage rate iec 62271203 highvoltage switchgear and controlgear part 203. Compliance with all technical requirements all energize elements comply with the required clearances clearances verify compliance with the last requirements of the national electrical safety code or prepa diseno subw\copy of svc subst profile 2.
Gasinsulated highvoltage switchgear gis is a compact metal encapsulated switchgear consisting of highvoltage components such as circuit. The assembly of apparatus used to change some characteristice. Gasinsulated switchgear up to 550 kv, 63 ka, 5000 a type 8dq1. Distribution substations michigan technological university. A gasinsulated substation gis uses a superior dielectric gas, sf6, at moderate pressure for phasetophase and phasetoground insulation. A onestop, complete reference text on gas insulated substations gis, largecapacity and longdistance electricity transmission, which are of increasing importance in the power industry today. The differences between air insulated substation engineering and gas insulated substation engineering are vast. Gas insulated substation electrical substation transformer.
Jan 26, 2018 this feature is not available right now. Mar 18, 2014 sub stationsair insulated substations 1. Gas insulated switchgear is used in industrial areas to fulfil highenergy demands by space saving design with a minimum of cost. The system of gasinsulated switchgear is composed by. Substation configuration reliability 1 reliability of substation configurations daniel nack, iowa state university, 2005 introduction while one of the strongest points in a power system is the electric. Combined with a significantly reduced footprint and sf6 gas insulation. This functional specification covers all types of substation with equipment installed for use on 2, 275 and 400 kv 50 hz systems. Gas insulated substations conference 2018 in washington dc. Sf6 gas superior dielectric properties used at moderate pressure for phase to phase and phase to ground insulation preferred for voltage ratings of 72.
Operation and maintenance of a gas insulated substation. Gas insulated substation free download as powerpoint presentation. Introduction ground grid, access roads, and auxiliary power gas insulated substations gis have become a major staging of construction equipment. Gas insulated switchgear up to 550 kv, 63 ka, 5000 a.
Scribd is the worlds largest social reading and publishing site. 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. Presented paper refers to service continuity of gasinsulated substations, a topic which is also dealt in annex f of iec international standard no. The input for a distribution substation is typically at least two. Ge provides a full range of gas insulated substations gis for utilities and industries worldwide. Key property of ais unit is stepup systems in connection with power stations and. Abb substations with gas insulated switchgear gis are unmatched when it comes to compactness, reliability, efficiency and safety, ensuring maximum power availability for utility, commercial and industrial customers. The basic insulation level bil required for a gas insulated substation gis is different from that of the conventional substation because of certain unique properties of the former. Product brochure gasinsulated switchgear elk04 modular.