Presented paper refers to service continuity of gas insulated substations, a topic which is also dealt in annex f of iec international standard no. 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 details advanced and basic material, accessible for both existing gis users and those planning to adopt the technology. Gas insulated switchgear and gis substations substation essentials course overview there is a continuous increase in the application of gas insulated switchgear gis into electric power transmission substations. Gis and ais systems for urban supply networks studies carried out by abb show that for urban supply networks the combination of hv gas insulated switchgear gis and hv cable has important advantages over systems with air insulated switchgear ais and overhead lines. This article is an introduction to gas insulated substations. 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. Comparison of gis and ais systems for urban supply networks. Gasinsulated highvoltage switchgear gis is a compact metal. The internal vfto causes stress on the main insulation in the gis, while the. Ge designs, manufactures, installs and services a full range of stateoftheart gas insulated substations gis for utilities and industries worldwide. Gas insulated substations electrical substation insulator. There are five major considerations in the differences between the two high voltage substations. Innovative gis based solutions for substations cigre sc23 colloquium venezuela, paper 3.
Gas insulated substations transmission distribution systems. Gis substation also offers unique advantages over air insulated applications. Products include electric motors and motor controls, adjustable speed drives, power electronics, transmission and distribution systems, and more. Introduction to gas insulated substations switchgears gis. Gis substations compact and resilient substations abb substations with gas insulated switchgear gis are unmatched when it comes to compactness, reliability, efficiency and safety, ensuring maximum power availability. Gas insulated substation authorstream presentation.
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. Jan 31, 2008 conventional substations using atmospheric air as the main dielectric cannot satisfy these requirements, but totally enclosed substations using sulphur hexafluoride sf6 gas insulation that are also known as gas insulated substations gis. Often, building new substations or increasing capacity is difficult because land is either not available or is prohibitively expensive. 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. Practical and theoretical aspects are handled by acknowledged gis experts who have been involved with the technology from the. The speakers will discuss reliability and system planning implications for gas insulated substations. The superior dielectric and arc quenching properties of sf 6 gas allow a substantial reduction in the size of the switchgear and gis. Ge provides a full range of gas insulated substations gis for utilities and industries worldwide. Gis substations use sf6 gas that reduces the distance needed between active and nonactive switchgear parts, resulting in smaller overall space requirements.
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. The portfolio includes gis solutions from 60 to 800 kv, along with hybrid, mobile and digital gis solutions, gas insulated lines and other secondary products to maximize switchgear and network. Spacer flashover in gas insulated switchgear gis tu delft. With gis the footprint of substations can be reduced. Gis there are two terms presented in iec gas insulated switchgear and ieee gas insulated substations. Abb pioneered high voltage gasinsulated switchgear in the mid1960s. The differences between air insulated substation engineering and gas insulated substation engineering are vast. Utilizing both technical presentations and case studies from leading utilities, attendees will be provided with a sound understanding of gis capability as well as realworld examples involved in selecting and constructing gis substations. Gis technology originated in japan, where there was a substantial need to develop technology to make substations as compact as possible. Gas insulated substation mainly used for a power transmission system or a substation system, of which outgoing busbar is shortened to reduce consumption of the outgoing busbar. Tom antonucci for the benefit of ieee, particularly the student members, with an interest to power systems. Paper 23102, 1998, report on the second international survey on highvoltage gas insulated substations gis service experience, paris, france 1998. The live parts and supported on at resin insulators. 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.
Think you know what a gas insulated substation gis. A gas insulated substation gis uses a superior dielectric gas, sf6, at moderate pressure for phasetophase and phasetoground insulation. Economics between conventional and gas insulated substation. Five differences between air insulated substations and gas. Main components of a gas insulated substation gis you. Conventional substations using atmospheric air as the main dielectric cannot satisfy these requirements, but totally enclosed substations using sulphur hexafluoride sf6 gas insulation that are also known as gas insulated substations gis. Gas insulated switchgear is used in industrial areas to fulfil highenergy demands by space saving design with a minimum of cost. The development focus for ais was on circuit breaker cb technology that would increase reliability and reduce maintenance. Installation, maintenance, and end of life of a gasinsulated. Gas insulated substations gis are replacing the conventional substations as they.
Gasinsulated substations gis electrical engineering portal. In this gis or gas insulated switchgear system than one functional element are encapsulate in a single metal enclosure. 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 metalenclosed gas insulated switchgear inherently follows the criteria for new substation design and offers a higher reliability and flexibility than other solutions. Gis can therefore be smaller than ais by up to a factor of 10. The high voltage conductors, circuit breaker interrupters, switches, current transformers, and voltage transformers are in sf6 gas inside grounded metal enclosures. All ngc plant and a pparatus wholly within the substation and not covered more specifically by other ngtss. Siemens transmission products presentation digital asset. Several crucial terms are for better understanding of the presented material.
Gis components gas insulated substations gis use circuit breakers, disconnect switches and grounding switches, and have various means of indicating their position, either opened or closed, so the same as. Gis components gas insulated substations gis use circuit breakers, disconnect switches and grounding switches, and have various means of indicating. Pdf application of gasinsulated modules gim to ehv. Usage of gas insulated system gis serves as the most. Contents introduction conventional substation ais limitation of ais need for gis introduction to gis gis unique features components of gis substation advantages of gis over conventional open air substation disadvantage of gis next presentation work. The portfolio includes gis solutions from 60 to 800 kv, along with secondary products to maximize switchgear and network operation. Gas insulated substation free download as powerpoint presentation.
The company has executed two gis projects for 145kv and 33kv and the third of 220kv is scheduled for commissioning in dec 2012. National grid substations technical specification ngts 2. The gasinsulated substation has a complicated design and contains elements which differ substantially in terms of the electric field distribution. For example, in some design, a three phase circuit breaker, current transformer, earth switches, even other feeder elements are covered together in a single metal capsule.
Gas insulated substation gis service ask price shyama power provides turnkey solution for designing, sourcing, execution, testing and commissioning of gis gas insulated switchgear substations. Gas insulated substation electrical substation transformer. Jan 18, 2017 gis technology and detail current design trends and maintenance solutions for gas insulated substations. Substations flexible, reliable epc solutions built from. Gis is now in widespread use in the electrical power industry, especially in metropolitan areas.
Recommendation for improving substation availability english pdf leaflet. Due to the gas enclosed design, gis is the most suitable solution for indoor and underground substations. This conference will address regulatory, technical and business considerations for gis. Gis highvoltage gas insulated switchgear substations. Gas insulated substations gis reliability results participation in the survey 20042007. Southern california public power authority awards abb order for gis substation project. The robust, lowmaintenance gis design minimizes the substation footprint. Electric field modelling in gasinsulated substation for analysis of.
Gas insulated substations gis have been used in power systems over the last three decades because of their high reliability, easy maintenance, small ground space requirement, etc. 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. Mitigation of lightning overvoltage in gas insulated substations. Today, the expected service life of gas insulated switchgear gis is approx. Due to their compactness and flexibility, gis substations can be lo. Ais, gis, mts condition assessment gas insulated substations sc b3.
Three phase encapsulated type sf6 gas insulated switchgear. Gas insulated substations gis form important network nodes, particularly in densely populated urban areas. However, over the last 30 years, gis at voltage up to 800 kv in various station. Abb substations with gas insulated switchgear gis are unmatched when it comes to compactness, reliability, efficiency and safety, ensuring maximum power availability for. Significant reduction in footprint through use of potent insulation gases. Gasinsulated substations gis the atmospheric air insulation used in a conventional, airinsulated substation ais requires meters of air insulation to do what sf6 can do in centimeters.
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 conference 2018 in washington dc. 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. An overview on gis gas insulated substation engineering. Gas insulated substations gis primarily use sulphur hexafluoride gas as the primary insulator. With gis experience spanning 50 years across a wide range of industries and applications, ge is a leader in the. Details advanced and basic material, accessible for both existing gis users and those planning to adopt the technology.
In 1965 abb delivered the worlds first substation with gasinsulated switchgear gis. Gas insulated substations giss are broadly used for. 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. Toshiba international corporation tic is toshibas premiere manufacturing base in north america. This course is based on terms used in ieee and iec regulations. Earthing switch slowoperating earthing switch are used for protection purpose when work is being done in the substation, but are operated only when it is certain that the highvoltage system is not energized. Application of gas insulated modules gim to ehv substations. 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. Gis technology can be used for installation in areas where the real estates is appreciable.