This is a significant change in operating the switchgear with circuit breakers, disconnectors, and switches earth. 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 technical specification for the civil engineering and building design and construction of secondary substation or 2275400kv substation equipment enclosures that form an integral part of primary. As vacuum technology is not available for high voltage, so for gis or gas insulated switchgear system above 72. All ngc plant and a pparatus wholly within the substation and not covered more specifically by other ngtss. This standard sets out requirements for markings, filling procedures, inspecting and testing, fittings and safe handling of gas cylinders incorporating an insulated stainless steel inner vessel, used for the storage and transport of fluids including those listed in table 1, and of water capacity not less than 0. With the advantage of sf6 gas insulating ability the interrupting arcs capability is 100 times more than air, gas insulated substation could operate in stable condition for. It is intended to assist engineers involved in the design, specification, installation, testing and maintenance of gas insulated switchgear and substations. Gas insulated substation sf6 gas gas insulated substations are high voltage substations that are compact, requiring little maintenance when compared to airinsulated conventional substations. A hybrid substation can be considered as technoeconomic solution for locations where space is a constraint and also for substationrenovation or augmentation. With proper caution,the methods described herein are also applicable to indoor portions of such substations, or to sub stations that are wholly indoors.
General specification for the civil engineering and building. Vuspec page 3 ieee 12402000 r2012, ieee guide for the evaluation of the reliability of hvdc converter stations ieee 12462011, ieee guide for temporary protective grounding systems used in substations. Gas insulated switchgear manufacturers for forming an association through pre bid tieup business sharing route to jointly address the following tender opportunity. The sf6 gas insulated substation gis is assembled by several sf6 gas insulated switchgear configurations in an outdoor enclosure which could reach ip54 protection grade. 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 take of structures etc. The equipment is popularly known as a gas insulated substation gis system. Highvoltage transmission line and sf6 gas insulated substations inspection using computed radiography 11th european conference on nondestructive testing october 610, 2014, prague czech republic. Its major advantage is the small space, occupied by the equipment compared to air insulated equipment. Power substation guides, research papers and studies eep. Pdf sulphur hexafluoride sf 6 has been of considerable technological.
There are five major considerations in the differences between the two high voltage substations. In 1965 abb delivered the worlds first substation with gasinsulated switchgear gis. The size of gas insulated substation is significantly small compared to conventional substation because a high electronegative property of sf6 gas b high dielectric property of sf6 gas c high insulation property of sf6 gas d all the above. Energy sector power transmission high voltage substations.
With gis the footprint of substations can be reduced. Conventional outdoor sub stations are a viable option when there is a plenty of. Offshore substation design development of standards. Gis highvoltage gas insulated switchgear substations. This electrical substation training course will cover the maintenance and testing requirements for common substation devices, including power transformers, oil, air and vacuum circuit breakers, switchgear, ground grid systems, batteries, chargers and insulating liquids. A mini project report on operation and maintenance of 2202kv substation submitted in partial fulfillment for the award of the degree of bachelor of technology in electrical and electronics engineering submitted by v. Xlpe underground cable systems the three cables in a 3phase circuit can be placed in different formations. It covers many of the relevant topics in gas insulated switchgear technology such as the understanding of the design and operation of the switchgear. Highvoltage transmission line and sf6 gasinsulated. 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. Gas insulated substation testing and application cedengineering. Iec 62271203 highvoltage switchgear and controlgear part 203. Gas insulated substations euci conference, february 2019.
Gas insulated substations have long been known for their compact design and. Compressed gas insulated substations cgis consist basically a conductor supported on insulators inside an enclosure which is filled with sulfur hexafluoride gas sf6. Switch analyser sa10 switch analyzer sa10 there are many advantages to using this scanner. Historically, offshore structures in the us have been related to the oil and gas industry. The speakers will discuss reliability and system planning implications for gas insulated substations. A gas insulated substationgis is a substation that uses a superior dielectric gas, sulfur hexafluoride sf6,high voltage. Distribution, transmission, and generating plant substations are also included.
It is ideal in dense urban areas where land for new facilities is limited and only available at prohibitive cost. 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. We aim to be your onestopshop for all your substation testing and substation electrical safety equipment. Pdf evaluation the high voltage gas insulated substations gis. The introduction of sf 6 gas has revolutionized not only the technology of circuit breakers but also the layout of substations. Gasinsulated substation provides a solution to the space problem. Substations transform voltage from high to low, or the reverse, or perform any of several other important functions.
Our 12hour live online substation training course will cover the major elements that build electrical substations and switchyards. The differences between air insulated substation engineering and gas. A gas insulated substation gis uses a superior dielectric gas, sf6, at moderate pressure for phasetophase and phasetoground insulation. The transdox 3100c is the latest high precision gas analyzer designed for controlling and monitoring the quality of sf 6 in gas insulated sub stations and circuit breakers. Gis after completion, and also test the interfaces.
A hybrid substation would require less space than conventional ais but more than gis. They will compare substation safety and security using ais vs. 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. Outdoor ac substations, either conventional or gas insulated, are covered in this guide. In this type of switchgear, all the necessary components of switchgear can be assembled in very limited space. The gas insulated switchgear assembly shall be supplied as indicated.
National grid substations technical specification ngts 2. We stock the leading brands in substation testing equipment, such as seba, megger programma and ridgid partial discharge testing, low resistance testing, oil testing, primary injection testing, protection relay test kits, circuit breaker testing, battery testing, earth testing. A gasinsulated substation gis uses a superior dielectric gas, sf6, at moderate pressure for phasetophase and phasetoground insulation. Switch analyser sa10 switch analyzer sa10 there are many advantages to using this scanner with a computer. For higher voltages, gas insulated switch gear reduces the space required around live bus. Related to the gis installation use, the main tests are dielectric tests, short. Work in substations general procedures work instructions mobile plant in the vicinity of high voltage conductors 2. To prove, if the gas insulated hvdc system is capable to withstand these phenomena, adequate testing proceduresa socalled insulation system test and pd testing are introduced. 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. Pdf highvoltage onsite commissioning tests for gasinsulated. Work in substations general this instruction assembles knowledge required for personnel to be authorised category 3 under the rules. 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. Is that the highvoltage current carrying parts are within a metal enclosure and are held in a concentric configuration by cast epoxy spacer. The high voltage conductors, circuit breaker interrupters, switches, current transformers, and voltage transformers are in sf6 gas inside grounded metal enclosures.
Presented paper refers to service continuity of gasinsulated substations, a topic which is also dealt in annex f of iec international standard no. Jan 02, 2019 sf 6 gas pressure for insulating purpose is generally kept below 2. A 2day professional development seminar on gas insulated. The transdox 3100c is the latest high precision gas analyzer designed for controlling and monitoring the quality of sf 6 in gas insulated substations and circuit breakers. Gasinsulated switchgear type elk14 the modular system for gis. A hybrid sub station can be considered as technoeconomic solution for locations where space is a constraint and also for sub stationrenovation or augmentation. Gis technology originated in japan, where there was a substantial need to develop technology to make substations as compact as possible. Rules for the certification and construction iv industrial.
This book provides an overview on the particular development steps of gas insulated highvoltage switchgear, and is based on the information given with the. When new sub stations are planned, there is the choice of different designs. However, as offshore wind developments progress in the us, guidance for offshore wind farms is necessary for. Siemens gis, cable bay with double busbar system including 2 bb ds, 1 line ds, 1 cb, 3 es. General specification for the civil engineering and. Pdf maintenance and operation of an electrical substation. Installation, onsite test, commissioning, and formal acceptance. Gis is a kind of metal enclosed switchgear that means, all the equipments of the electrical switchgear are enclosed by gas tight metal enclosure and sf 6 gas is used as insulation between live parts of the. Highvoltage onsite commissioning tests for gasinsulated substations using uhf partial discharge detection. Gas insulated substation gis, hv switchgear, ac high voltage test, partial. Operation and maintenance of a gas insulated substation. Dtl has adopted latest technologies in the field of transmission such gas insulated sub stations gis and laying underground 220 kv and 400 kv cables.
The purpose of this document is to provide a general guide to the design of an air insulated switchgear ais and a gas insulated switchgear gis of an ac substation. We offer each and everything regarding electrical substation installation and commissioning. Gas insulated substations gis form important network. Design, engineering, fabrication, manufacture, supply, erection, testing and commissioning of korattur 40023011033 kv gis substation and korattur 230kv ug. Gas insulated switchgear is used in industrial areas to fulfil highenergy demands by space saving design with a minimum of cost. A substation is a part of an electrical generation, transmission, and distribution system. Dtl has adopted latest technologies in the field of transmission such gas insulated substations gis and laying underground 220 kv and 400 kv cables.
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