Conventional outdoor sub stations are a viable option when there is a plenty of. Lsis has been a leader of development of industry and best partner to improve. 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. Gis is now in widespread use in the electrical power industry, especially in metropolitan areas. 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. 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. You may enter your filters below to locate manuals, brochures, software, drawings, and other important documents. The high voltage conductors, circuit breaker interrupters, switches, current transformers, and voltage transformers are in sf6 gas inside grounded metal enclosures. This is a significant change in operating the switchgear with circuit breakers, disconnectors, and switches earth. A gas insulated substation gis uses a superior dielectric gas, sf6, at moderate pressure for phasetophase and phasetoground insulation. Gas insulated switchgear is used in industrial areas to fulfil highenergy demands by space saving design with a minimum of cost. Several crucial terms are for better understanding of the presented material. Welcome to toshiba international corporations download site.
Mar 18, 2014 sub stations air insulated substations 1. Global gas insulated substation market size is set to witness robust growth during the forecast period. Details advanced and basic material, accessible for both existing gis users and those planning to adopt the technology. The initial equipment cost of gis is usually higher than that of conventional air insulated substation ais. Gis there are two terms presented in iec gas insulated switchgear and ieee gas insulated substations. With further gas leakage, the low pressure alarm is sounded or automatic tripping or lockout occurs. Distribution, transmission, and generating plant substations are also included. Gas insulated substation gis advantages disadvantages. National grid substations technical specification ngts 2. Increasing population coupled with rapid industrialization and growing demand for efficient energy sources will propel the industry growth. 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 portfolio includes gis solutions from 60 to 800 kv, along with secondary products to maximize switchgear and network operation. Economics between conventional and gas insulated substation. 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. Gas insulated substations transmission distribution systems. 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. 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. Jan 02, 2014 gas insulated substation has gas monitoring system. Presented paper refers to service continuity of gasinsulated substations, a topic which is also dealt in annex f of iec international standard no. Gas insulated switchgear with gas insulated busbar for heavy duty applications up to 38kv.
Register to view our materials and keep informed with our latest updates. 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. 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 inside each compartment should have a pressure of about 3kgcm 2. Gas insulated substations euci conference, february 2019. Gas insulated switchgear with solid dielectric busbar for applications up to 38kv. 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. 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 sub station sf6 gas gas insulated substations are high voltage substations that are compact, requiring little maintenance when compared to air insulated conventional substations. Operation and maintenance of a gas insulated substation. Jan 26, 2018 this feature is not available right now. If the pressure drops slightly, the gas is automatically trapped up.
Gis highvoltage gas insulated switchgear substations. 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. The assembly of apparatus used to change some characteristice. Gas insulated substation market size industry share report 2026. Gas insulated substation free download as powerpoint presentation. 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. A typical gas insulated substation is shown in fig. 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. 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. 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. This type of substation gets the power supply from a near producing facility. Sulphur hexaflouride sf6 gas the primary insulating medium. Outdoor ac substations, either conventional or gas insulated, are covered in this guide. Pdf gas insulated transmission lines in railway galleries.
They will compare substation safety and security using ais vs. As a result, substation equipment had to be made more reliable and. Lsis who has been a leader in electricity and automation in. The concept of the gas insulated substation was introduced in 1920 when oil was used as the insulating medium in the system. With proper caution,the methods described herein are also applicable to indoor portions of such substations, or to sub stations that are wholly indoors. A gas tight barrier insulator in switchgear serve for the separation of gas compartments and prevents neighbouring switchgear parts from being affected during maintenance. Presented paper refers to service continuity of gas insulated substations, a topic which is also dealt in annex f of iec international standard no. Select a category, choose a product family, then select from the list of available documents. 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. 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 medium. 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.
When new sub stations are planned, there is the choice of different designs. The differences between air insulated substation engineering and gas insulated substation engineering are vast. The third chapter presents the technology, covering the following in detail. There are five major considerations in the differences between the two high voltage substations.
The transmission lines shall be routed to avoid buildings and build up areas wherever possible. Preventive maintenance of substation equipment and. Ge provides a full range of gasinsulated substations gis for utilities and industries worldwide. The speakers will discuss reliability and system planning implications for gas insulated substations. This course is based on terms used in ieee and iec regulations. 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. Gas insulated substation authorstream presentation. Gis technology originated in japan, where there was a substantial need to develop technology to make substations as compact as possible. Its major advantage is the small space, occupied by the equipment compared to air insulated equipment. 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 different types of substations mainly include stepup type substation, stepdown transformer, distribution, underground distribution, switchyard, customer substation, and system station. Gas insulated substation electrical substation transformer. 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. All ngc plant and a pparatus wholly within the substation and not covered more specifically by other ngtss. Scribd is the worlds largest social reading and publishing site.
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