Gas insulated substations gis have received great interest in the recent years. Gas insulated substation electrical substation transformer. They will compare substation safety and security using ais vs. A gis is the implementation, within a complete hv substation, of. National grid substations technical specification ngts 2. An ais unit is basically a conventional switchgear technology where air is used as a primary dielectric for 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. 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. 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. Gas insulated substation designs as an effective method to protect a substation george becker, senior substation engineer, power engineers. 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. Introduction to gas insulated substations switchgears gis. Jan 26, 2018 this feature is not available right now. Over view components of gis specification of gis gis substation layout comparison with conventional substation. 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. This article is an introduction to gas insulated substations.
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. Operation and maintenance of a gas insulated substation. Xdge is one of the most reliable gas insulated switchgear suppliers with. Gas insulated switchgear electrical substation electric arc. An ais unit is basically a conventional switchgear technology where air is used. 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 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. Siemens is a leading supplier of engineering, equipment, solutions, and services for highvoltage substations, such as air insulated substations, gasinsulated. The considerably larger variation for the complete. Many substation delivery time in as little as six weeks after design approval rigorous. Details advanced and basic material, accessible for both existing gis users and those planning to adopt the technology. 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. Combined with a significantly reduced footprint and sf6 gas insulation. Three phase encapsulated type sf6 gas insulated switchgear. 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. Substation structure design guide provides a comprehensive resource for the structural design of outdoor electrical substation structures. The input for a distribution substation is typically at least two.
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. Gas insulated substations conference 2018 in washington dc. 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. According to the author gis are much more reliable, compact and maintenance free. The highvoltage conductor forms the primary winding. Ge provides a full range of gasinsulated substations gis for utilities and industries worldwide. This functional specification covers all types of substation with equipment installed for use on 2, 275 and 400 kv 50 hz systems. Think you know what a gas insulated substation gis.
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 gasinsulated substation gis uses a superior dielectric gas, sf6, at moderate pressure for phasetophase and phasetoground insulation. Due to the gas enclosed design, gis is the most suitable solution for indoor and underground substations. 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. One of the advantages of gis over conventional substations are their compactness, which makes them a favorite for service in. Guidelines for usage of air insulated substation ais or gas.
Prepared by the subcommittee on the design of substation structures of the committee on electrical transmission structures of the structural engineering institute of asce. The portfolio includes gis solutions from 60 to 800 kv, along with secondary products to maximize. Gas insulated substations transmission distribution systems. 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 major difference between conventional air insulated substations ais and the gas insulated substations gis is that the sf6 gas insulated. Gis, 145 kv and 170 kv lilo layout predesigned gasinsulated switchgear for. Toshibas gas insulated substation gis is a compact and highly economical substation solution for electric utilities, commercial, and industrial applications in densely populated cities. 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. The system of gasinsulated switchgear is composed by. A switchgear may be a simple openair isolator switch or it may be insulated by some other substance. Sf6 gas superior dielectric properties used at moderate pressure for phase to phase and phase to ground insulation preferred for voltage ratings of 72.
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. Scribd is the worlds largest social reading and publishing site. 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. Product brochure gasinsulated switchgear elk04 modular. Gas insulated substation gis also called sf6 gas insulated metalclad switchgear is preferred for 12kv, 36kv, 72. Gas insulated substation definitions and basics cedengineering. Key property of ais unit is stepup systems in connection with power stations and. Compact design ideal for space constrained projects in crowded. Operation of a gis substation involves the same principles as operati ng an. Gasinsulated highvoltage switchgear gis is a compact metal encapsulated switchgear consisting of highvoltage components such as circuit. India high voltage gasinsulated switchgear and hybrid switchgear, pass english pdf. Gas insulated substation gis vs conventional outdoor substation ais by engr. Distribution substation a distribution substation transfers power from the transmission system to the distribution system of an area.
Siemens provides a wide range of services including the supply of complete packages of highvoltage. 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. 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. Gasinsulated switchgear up to 550 kv, 63 ka, 5000 a type 8dq1.
Gasinsulated highvoltage switchgear gis is a compact metal. Riaz ahsan baig year of publication 2004 0 abstract the author in his paper has made comparison of. Pioneer and technology leader driving gis innovations. Gas insulated substations provides a comprehensive coverage of a wide range of topics which include. Major players in the sector over view what happens when a circuit breaker start opening under electrical fault.
Several crucial terms are for better understanding of the presented. Ge provides a full range of gas insulated substations gis for utilities and industries worldwide. The high voltage conductors, circuit breaker interrupters, switches, current transformers, and voltage transformers are in sf6 gas inside grounded metal enclosures. This course is based on terms used in ieee and iec regulations. Study for optimal design of gas insulated substations gis. Introduction ground grid, access roads, and auxiliary power gas insulated substations gis have become a major staging of construction equipment. The assembly of apparatus used to change some characteristice. As all other modules can be connected directly, by. Gis there are two terms presented in iec gas insulated switchgear and ieee gas insulated substations. 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. Gas insulated substation free download as powerpoint presentation. An effective although more costly form of switchgear is the gasinsulated switchgear gis, where the.
The station layout and equipment rating shall be based on the single line diagram and general layout enclosed. 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. Siemens is a leading supplier of engineering, equipment, solutions, and services for highvoltage substations, such as air insulated substations, gasinsulated substations, and gasinsulated lines. 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. 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. A gas insulated substation gis uses a superior dielectric gas, sf6, at moderate pressure for phasetophase and phasetoground insulation. Presented paper refers to service continuity of gasinsulated substations, a topic which is also dealt in annex f of iec international standard no.
Gis highvoltage gas insulated switchgear substations. The metalenclosed gas insulated switchgear inherently follows the criteria for new substation design and offers a higher reliability and flexibility than other solutions. Sulphur hexaflouride sf6 gas the primary insulating medium. Several crucial terms are for better understanding of the presented material.
There are five major considerations in the differences between the two high voltage substations. 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. The portfolio includes gis solutions from 60 to 800 kv, along with secondary products to maximize switchgear and network operation. Gis there are two terms presented in iec gas insulated switchgear and. Distribution substations michigan technological university. 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. 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 switchgear up to 550 kv, 63 ka, 5000 a.
Layout design according to land available to customers. 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. The differences between air insulated substation engineering and gas insulated substation engineering are vast. This article is an introduction to gasinsulated substations. Gasinsulated switchgear up to 550 kv, 63 ka, 5000 a type. Gasinsulated switchgear elk04 modular system up to 170 kv, 4000 a, 63 ka product brochure. Hv and ehv gis application and design considerations. Mar 18, 2014 sub stationsair insulated substations 1. Gis technology originated in japan, where there was a substantial need to develop technology to make substations as compact as possible. Gas insulated switchgear is used in industrial areas to fulfil highenergy demands by space saving design with a minimum of cost.