Gis there are two terms presented in iec gas insulated switchgear and ieee gas insulated substations. Operation and maintenance of a gas insulated substation. The differences between air insulated substation engineering and gas insulated substation engineering are vast. Sulphur hexaflouride sf6 gas the primary insulating medium. 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 operation, including springoperated mechanisms for ais, gis and generator circuit breakers. Welcome to toshiba international corporations download site. Gas insulated switchgear with gas insulated busbar for heavy duty applications up to 38kv. This type of substation gets the power supply from a near producing facility. There are five major considerations in the differences between the two high voltage substations. They will compare substation safety and security using ais vs. 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. The start of the book presents the theory of gas insulated technology, and outlines reliability, design, safety, grounding and bonding, and factors for choosing gis. Jan 02, 2014 gas insulated substation has gas monitoring system. You may enter your filters below to locate manuals, brochures, software, drawings, and other important documents.
The paper deals with the possibility of installing a doublecircuit gas insulated transmission line gil in the pilot tunnel of the planned new railway galleries bolzanoinnsbruck. Pdf gas insulated transmission lines in railway galleries. As a result, substation equipment had to be made more reliable and. The portfolio includes gis solutions from 60 to 800 kv, along with secondary products to maximize switchgear and network operation. 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. Gas insulated substation authorstream presentation.
Most of the equipment in a sub station is provided with sufficient insulation from breaking down, yet others like bus bars, terminations of high voltage equipment, the equipment connected to takeof structures etc. The high voltage conductors, circuit breaker interrupters, switches, current transformers, and voltage transformers are in sf6 gas inside grounded metal enclosures. Gas insulated substation electrical substation transformer. Mar 18, 2014 sub stations air insulated substations 1. Sf6 gas superior dielectric properties used at moderate pressure for phase to phase and phase to ground insulation preferred for voltage ratings of 72.
All ngc plant and a pparatus wholly within the substation and not covered more specifically by other ngtss. Gas insulated switchgear is used in industrial areas to fulfil highenergy demands by space saving design with a minimum of cost. Its major advantage is the small space, occupied by the equipment compared to air insulated equipment. Register to view our materials and keep informed with our latest updates. A gas tight barrier insulator in switchgear serve for the separation of gas compartments and prevents neighbouring switchgear parts from being affected during maintenance. Home download center electrical engineering books and technical guides power substation guides technical specification for 220kv sf6 gas insulated metal enclosed switchgear gis sf6 gis the sf6 gas insulated metal enclosed switchgear shall be totally safe against inadvertent touch of any of its live constituent parts. Compressed gas insulated substations cgis consist basically a conductor supported on insulators inside an enclosure which is filled with sulfur. Ge provides a full range of gas insulated substations gis for utilities and industries worldwide.
Gas insulated substations euci conference, february 2019. 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. 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. 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. With further gas leakage, the low pressure alarm is sounded or automatic tripping or lockout occurs. Gis highvoltage gas insulated switchgear substations.
The third chapter presents the technology, covering the following in detail. The transmission lines shall be routed to avoid buildings and build up areas wherever possible. 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. Conventional outdoor sub stations are a viable option when there is a plenty of.
Gas insulated substation free download as powerpoint presentation. Three phase encapsulated type sf6 gas insulated switchgear. 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. 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. The gas insulated substation gis is a compact assembly consisting of multiple components enclosed in a metallic covering with compressed sulphur hexafluoride sf6 gas as an insulating medium. If the pressure drops slightly, the gas is automatically trapped up. National grid substations technical specification ngts 2. Gas insulated substation gis advantages disadvantages. Gas inside each compartment should have a pressure of about 3kgcm 2. The speakers will discuss reliability and system planning implications for 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. Presented paper refers to service continuity of gasinsulated substations, a topic which is also dealt in annex f of iec international standard no. This is a significant change in operating the switchgear with circuit breakers, disconnectors, and switches earth. The decision covers all power transformers, whether sold as standalone product or included in turnkey projects, but excludes power transformers sold as part of gasinsulated switchgearbased substations which have already been subject to the commission decision of 24 january 2007 in case compf38.
Lsis who has been a leader in electricity and automation in. 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. Economics between conventional and gas insulated substation. Outdoor ac substations, either conventional or gas insulated, are covered in this guide. Gas insulated switchgear with solid dielectric busbar for applications up to 38kv. Jan 26, 2018 this feature is not available right now.
With proper caution,the methods described herein are also applicable to indoor portions of such substations, or to sub stations that are wholly indoors. Gas insulated sub station sf6 gas gas insulated substations are high voltage substations that are compact, requiring little maintenance when compared to air insulated conventional substations. Select a category, choose a product family, then select from the list of available documents. This course is based on terms used in ieee and iec regulations. A major difference between conventional air insulated substations ais and the gas insulated substations gis is that the sf6 gas insulated electrical components are placed within an earthed, pressurized metallic container. 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. Several crucial terms are for better understanding of the presented material. Increasing population coupled with rapid industrialization and growing demand for efficient energy sources will propel the industry growth. Gas insulated substations transmission distribution systems. Gis technology originated in japan, where there was a substantial need to develop technology to make substations as compact as possible. Details advanced and basic material, accessible for both existing gis users and those planning to adopt the technology. 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.
The assembly of apparatus used to change some characteristice. A gas insulated substation gis uses a superior dielectric gas, sf6, at moderate pressure for phasetophase and phasetoground insulation. Distribution, transmission, and generating plant substations are also included. When new sub stations are planned, there is the choice of different designs. The different types of substations mainly include stepup type substation, stepdown transformer, distribution, underground distribution, switchyard, customer substation, and system station. A typical gas insulated substation is shown in fig. Presented paper refers to service continuity of gas insulated substations, a topic which is also dealt in annex f of iec international standard no. 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. Gis is now in widespread use in the electrical power industry, especially in metropolitan areas. Ge provides a full range of gasinsulated substations gis for utilities and industries worldwide. Scribd is the worlds largest social reading and publishing site. Lsis has been a leader of development of industry and best partner to improve. Global gas insulated substation market size is set to witness robust growth during the forecast period. Gas insulated substation market size industry share report 2026.
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