With gis experience spanning 50 years across a wide range of industries and applications, ge is a leader in the. 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 bus bars may be of either rigid type or flexible strain type depending upon the choice of the designer considering the overall suitability and economy of the substation to be installed. Technical specification construction of 3311 kv primary sub.
In normal substation the clearances between the phase to phase and phase to ground is very large. 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. Nesco has adopted the philosophy of installing open terminal air insulated substations. Presented paper refers to service continuity of gas insulated substations, a topic which is also dealt in annex f of iec international standard no. The speakers will discuss reliability and system planning implications for gas insulated substations. Gas insulated substations conference 2018 in washington dc.
Economics between conventional and gas insulated substation. Study of gas insulated substation and its comparison with. They will compare substation safety and security using ais vs. Design of an airinsulated switchgear substation based on new technology.
Arrangement of the switching devices will impact maintenance, protection, initial substation development, and cost. A direct comparison of the component investment for identical switchgear configurations suggests that the gis variant is more costly than the air insulated switchgear ais solution. The differences between air insulated substation engineering and gas insulated substation engineering are vast. Installation, maintenance, and end of life of a gasinsulated.
This problem can be solved by using gas insulated switchgear technology. Gas insulated substation free download as powerpoint presentation. Air insulated substation air insulated substations are the conventional switchgear substations which are been enacted since past decades. Gasinsulated metalenclosed switchgear for rated voltages above 52 kv 092011 orequired leakage rate air insulated substation engineering and gas insulated substation engineering are vast. Design using design manual, specifications, internal standards. It is suitable for both indoor and outdoor applications. This paper presents a comparative analysis of gas insulated substation and air insulated substation. Practical and theoretical aspects are handled by acknowledged gis experts who have been involved with the technology from the start. As an alternative, a number of solutions are also available which combine.
Airinsulated substation elearning ge grid solutions. Gis substation also offers unique advantages over air insulated applications. Gis is now in widespread use in the electrical power industry, especially in metropolitan areas. What structural engineers should know about substation. Siemens is a leading supplier of engineering, equipment, solutions, and services for highvoltage substations, such as air insulated substations, gas insulated substations, and gas insulated lines. It requires minimum floor space and building volume. Our professionals hold expertise in meeting the demands of air insulated substation services. What structural engineers should know about substation rigid bus design. A space of gis as described in iec 62271203 as part of a gas isolated. One circuitbreaker with blk drive both single and threephase operation. Key words reliability, hvmv substations, gasinsulated switchgear gis, air. There are five major considerations in the differences between the two high voltage. Best practices and considerations wednesday, january 31, 2018 featuring a waterfront substation site visit tuesday, january 30, 2018. Our experience and capabilities for power delivery systems encompass overhead and underground lines and openair and gasinsulated substations, distribution networks and transmission system communication facilities.
Basic design and analysis of airinsulated substations. If the switchgear is sold to new owners, they must receive this document along with the. Gis substations use sf6 gas that reduces the distance needed between active and nonactive switchgear parts, resulting in smaller overall space requirements. There are five major considerations in the differences between the two high voltage substations. There are six types of substation bus switching arrangements commonly used in air insulated substations. Substation gas insulated switchyards our experience and capabilities for power delivery systems encompass overhead and underground lines and openair and gasinsulated substations, distribution networks and transmission system communication facilities. Our portfolio of highquality products and advanced technologies, including disconnecting circuit breakers dcb and iec 61850 substation automation systems, reduce substation footprint and enable smart grid integration.
In this type of switchgear, all the necessary components of switchgear can be assembled in very limited space. Layout of a typical 500 kv substation using airinsulated switchgear. Pdf technology progress in highvoltage gasinsulated substations. Gas insulated switchgear is used in industrial areas to fulfil highenergy demands by space saving design with a. The content of the book covers a range of substation topologies. Preparing for the smart grid evolution the air insulated substation, with a capacity of 220 kilovolt kv, was deployed by abb in 2008. Two disconnectors with their own motormanual drive.
Substation safety equipment and rail delta sama jaya sdn. As the electricity demand is increasing day by day, the power companies are giving their active. Mar 18, 2014 sub stationsair insulated substations 1. All types, whether sprung loaded or not should be applied by means of an operating socket attached to an insulated operating pole. This definitio n typically relates to high voltage switchgear and control gear.
The gis is highly reliable system, free of environmental hazards. Airinsulated substation article about airinsulated. Hello, this video is for comparing of gas insulated substation gis vs air insulated substation ais for urban and rural areas with discussion. Practical and theoretical aspects are handled by acknowledged gis experts who have been involved with the technology from the. Gas insulated substation gis advantages disadvantages. Gas insulated substations are used where there is space for providing the substation is expensive in large cities and towns. Gas insulated substation market 2025 by types, application. Gas insulated substations transmission distribution.
The substation layout is the disposition or arrangement of highvoltage equipment. Combined with a significantly reduced footprint and sf6 gas insulation, toshiba gis can operate in unconventional indoor spaces while maintaining its. Gas insulated substation electrical substation scribd. Ageing of the system impact on planning of the working. Gas insulated switchgear gis the compact design and small dimensions of gis make it possible to install substations of up to 550 kv right in the middle of.
Apr 30, 2018 hello, this video is for comparing of gas insulated substation gis vs air insulated substation ais for urban and rural areas with discussion of each individual substation component. Its modular design allows for a large variety of layout configurations. Due to its enclosed construction, gas insulated substation is operable under. Ge provides a full range of gas insulated substations gis for utilities and industries worldwide. The design of an air insulated substation starts with a basic work of selection of site which includes a large area of land and environmental conditions for the installation of substation 2. Innovative compact 14512 kv indoor air insulated substations ais.
For substation line end clamps the design of all line end clamps is such that once hooked over the bus bar they become self supporting whilst the operating screw is tightened or loosened. These instructions for assembly are an integral part of the product and must be stored so that they are at any time readily accessible for and can be used by persons who are to work on the switchgear. Various factors affect the reliability of a substation, one of which is the arrangement of the switching devices. An introduction best practices and considerations monday, january 29, 2018 postconference workshop gis commissioning. 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. We are engaged in providing various air insulated substation services, such as switchyard equipment panel erection and tower erection, earthing of sub station. Specification and selection of main components for airinsulated. Gas insulated substation gis vs air insulated substation. Study of gas insulated substation and its comparison with air. Gas insulated metal enclosed switchgear metal enwrapped switchgear in which the insulation is receivedpartially, at least, by an insulating gas other than air at atmospheric pressure, as described in iec 62271 203.
Additionally specialized substations such as ultra high voltage uhv, offshore substations for wind power plants and the use of gas insulated lines are included. Siemens provides a wide range of services including the supply of complete packages of highvoltage. Abb substations with air insulated switchgear ais provide a costefficient and wellproven solution without compromising on reliability. This presentation includes definitions of the various physical areas making up a power station, an air insulated substation, or a gas insulated substation. Understand the role of hv airinsulated substation, and gain insight on transformers, circuit breakers, disconnectors, surge arresters and instrument transformers. Iec 62271203 highvoltage switchgear and controlgear part 203. Easy to expand in case that space is not an issue excellent overview, simple handling and easy access. A gas insulated substation due to its modular construction and compact nature is a viable alternative to the conventional air insulated substation. Sub stationsair insulated substations linkedin slideshare. 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. 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 portfolio includes gis solutions from 60 to 800 kv, along with secondary products to maximize switchgear and network operation.
Substations play a crucial role in electricity distribution infrastructures as a part of the transmission and distribution systems, performing several core functions such as the transformation of voltage from high to low, or vice versa. A brief study of both the substations is carried out. Presented paper refers to service continuity of gasinsulated substations, a topic which is also dealt in annex f of iec international standard no. Southern california public power authority awards abb order for gis substation project. Toshibas gas insulated substation gis is a compact and highly economical substation solution for electric utilities, commercial, and industrial applications in densely populated cities. Every sub station is controlled by some experienced manpower, including one in charge,23 engineers, 45 technical staffs. Pdf highvoltage and mediumvoltage hvmv substations typically. Compass means compact prefabricated airinsulated substation and includes all the high voltage functions of a single bay in just one module. 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. Gas insulated substation definitions and basics cedengineering.
A direct comparison of the component investment for identical switchgear configurations suggests that the gis variant is more costly than the airinsulated switchgear ais solution. The metalenclosed gas insulated switchgear inherently follows the criteria for new substation design and offers a higher reliability and flexibility than other solutions. The metalenclosed gas insulated switchgear is made as to ensure the best possible relationship between design, used materials, maintenance effort and maintenance intervals. Due to the gas enclosed design, gis is the most suitable.
Pdf in the last two decades, the evolutionary development of gasinsulated substationsswitchgear gis has resulted in higher integration of. The rated insulation level of switchgear and control gear shall be selected from the values given in tables 12. Switchgear and substations electrical engineering portal. Jan 02, 2014 gas insulated substations are used where there is space for providing the substation is expensive in large cities and towns. Open air substations one type of substation is an open air substation, which is the traditional design that uses the insulation properties of ambient air as an external insulating medium. The design objective for the substation is to provide as high a level of reliability and flexibility as possible while satisfying system requirements and minimizing total investment costs. Air insulated, gas insulated and mixed technology switchgear substations together with the essential secondary systems. Sep 29, 2009 various factors affect the reliability of a substation, one of which is the arrangement of the switching devices. Air insulated substation,tower erection services,earthing.
Although gas insulated substations gis have different specifications in proportion to air insulated substations, transformer failures related to lightning and switching are often reported in the gas insulated substation gis. Gas insulated substation market industry analysis, share. Ge provides a full range of gasinsulated substations gis for utilities and industries worldwide. Five differences between air insulated substations and gas. Home technical articles ais air insulated substations. Air insulated outdoor substations of open design are not completely safe to touch, and are directly exposed to the effects of the climate and the environment.
High voltage products compass compact prefabricated air. Air insulated substation services, undertaken by us, are known for their excellent results. Air insulated substations busswitching configurations. Ieee guide for bus design in air insulated substations. Ieee 605 is a great source for substation rigid bus design. Gis there are two terms presented in iec gas insulated switchgear and ieee.
A typical gas insulated substation is shown in fig. Installation, maintenance, and end of life of a gas. 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. 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. Substation engineering ais and gis substations beta. Due to this, large space is required for the normal or air insulated substation ais. The assembly of apparatus used to change some characteristice. 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. Urban supply systems combining gis technology and hv cable are safe, reliable and environmentally benign. Nov 06, 2016 the differences between air insulated substation engineering and gas insulated substation engineering are vast. Comparison of gis and ais systems for urban supply networks. Due to the gas enclosed design, gis is the most suitable solution for indoor and underground substations.
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