The differences between air insulated substation engineering and gas insulated substation engineering are vast. Product brochure gasinsulated switchgear elk4, 800 kv. Gasinsulated substations high system reliability highflexibilityofitssolutionsmodularityexpandability gasinsulated 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. Because the substation is enclosed in a building, a gis is less sensitive to pollution, as well as salt, sand or large amounts of snow. 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. Occupies very less space 110th compared to ordinary substations. Product brochure gasinsulated switchgear elk4, 800 kv pioneering technology for extrahigh voltage applications. Figure1, 2 and 3 are reproduced from the documents prepared by sprecher energie. Characteristic advantages of the elk0 substations are space saving, compact design high availability low maintenance and. The clearance required for phase to phase and phase to ground for all equipment is. General specification for the civil engineering and.
A gas insulated substation gis is a high voltage substation in which the major conducting structures are contained within a sealed environment with a dielectric gas known as sf6, or sulfur hexafluoride gas as the insulating medium. Gas insulated switchgear is used in industrial areas to fulfil highenergy demands by space saving design with a minimum of cost. Gis is now in widespread use in the electrical power industry, especially in metropolitan areas. Due to the gas enclosed design, gis is the most suitable solution for indoor and underground substations. 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. Gas insulated substation report electrical substation transformer. 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. Study of gas insulated substation and its comparison with air. In normal substation the clearances between the phase to phase and phase to ground is very large. Estimation of transient over voltages in gas insulated. 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 substation gis, transient over voltages, switching operations, line faults and control circuitry.
Lsis who has been a leader in electricity and automation in. And the availability and reliability of the gis substations are more compared to air insulated substations faults occurring chances of air insulated substation or conventional substations are more. With gis experience spanning 50 years across a wide range of industries and applications, ge is a leader in the. Sf6 gas which has high dielectric property acts as insulating medium to the high voltage or extra high voltage substation equipment. Kumtor substation an integrated north american wood products company, west fraser operates more than 35 mills across western canada and the southern united states.
As an optimal scheme of electrical power transmission, gas insulated transmission lineswitchgear gilgis possess tremendous advantages for conveying. Gas insulated substations are used where there is space for providing the substation is expensive in large cities and towns. Based on this, the gil can be seen as a passive highvoltage gas insulated system with no active moving parts e. Three phase encapsulated type sf6 gas insulated switchgear. Indoor gas insulated substation gas insulated substation uses sulfur hexafluoride sf6 gas which has a superior dielectric properties used at. An introduction to gas insulated substations september 2829, 2017 denver, co page 2 overview faced with increasing demands for reliability, improved aesthetics and security, the adoption of gas insulated substations gis by north. Several crucial terms are for better understanding of the presented material.
For the purposes of this working group we shall use the term gis to refer to all gasinsulated, metalclad electrical equipment at electricity substations where both the substation busbars and the interfacing switchgear. Ge provides a full range of gas insulated substations gis for utilities and industries worldwide. Some of the advantages and disadvantages of gas insulated substations gis are. The abbreviation gis gas insulated switchgear is commonly used to designate gas insulated, metalclad electrical switchgear. Medium voltage distribution catalogue 2015 genieevo range. Gis there are two terms presented in iec gas insulated switchgear and ieee gas insulated substations. 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. A gas insulated substation gis uses a superior dielectric gas, sf6, at moderate pressure for phasetophase and phasetoground insulation. A gas insulated substation gis is a substation that uses a superior dielectric gas, sulfur hexafluoride sf6,high voltage.
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. If the switchgear is sold to new owners, they must receive this document along with the. Comparison of gis and ais systems for urban supply networks. Gas insulated substation has gas monitoring system. Ges f35 gis is a fieldproven solution with high availability that meets the challenges of networks up to 170 kv for power generation, transmission, distribution, tertiary and heavy industry applications. Ieee pes substations committee gasinsulated substations. This course is based on terms used in ieee and iec regulations. Toshibas gas insulated substation gis is a compact and highly economical substation solution for electric utilities, commercial, and industrial applications in densely populated cities.
Economics between conventional and gas insulated substation. E003435 substation distribution network locating genieevo in mv network. Ge provides a full range of gasinsulated substations gis for utilities and industries worldwide. Gastight barrier insulators ensure that any effect on adjacent substation components is kept to a minimum. Manual service of disconnect and earthing switches is only possible under. Gas insulated substation report free download as pdf file. Gas insulated substations conference 2018 in washington dc. Practical and theoretical aspects are handled by acknowledged gis experts who have been involved with the technology from the start.
Presented paper refers to service continuity of gasinsulated substations, a topic which is also dealt in annex f of iec international standard no. Although the initial cost of building a gis is higher than building an air insulated substation, the operation. The new 500220 kilovolt kv gasinsulated substation will dispatch 1. Due to the gas enclosed design, gis is the most suitable. Sf6 gas superior dielectric properties used at moderate pressure for phase to phase and phase to ground insulation preferred for voltage ratings of 72. Gas inside each compartment should have a pressure of about 3kgcm 2. For the purposes of this working group we shall use the term gis to refer to all gas insulated, metalclad electrical equipment at electricity substations where both the substation busbars and the interfacing switchgear. Gas insulated switchgear gis refers to the general equipment of a substation in a metal enclosure filled with highinsulation sf 6 gas and connected to the ground, which includes a circuit breaker, disconnecting switches, earthing switches, and peripheral devices e. The substation, assembled by gas insulated switchgear, is popularly known as gas insulated metal enclosed substation gimes. A gas insulated substation due to its modular construction and compact nature is a viable alternative to the conventional air insulated substation.
Sulphur hexaflouride sf6 gas the primary insulating medium. Substation fence and physical security surveillance planning water requirements and supply arrangement fire protection, lighting and ventilation of control room and other equipment gas insulated switchgear gis as an alternative to outdoor switchyard why gas insulated substation. Control in sf6 gasinsulated equipment k8 chdave giegel vcbrian withers completed approved december 20 expires 2023 the standard is complete. The portfolio includes gis solutions from 60 to 800 kv, along with secondary products to maximize switchgear and network operation. 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. Lsis who has been a leader in electricity and automation. Local control cabinet paragraph provides details on different types of gis. Based on this, the gil can be seen as a passive highvoltage gasinsulated system with no active moving parts e. The abbreviation gis gas insulated switchgear is commonly used to designate gasinsulated, metalclad electrical switchgear. Due to this, large space is required for the normal or air insulated substation ais. Tom antonucci for the benefit of ieee, particularly the student members, with an interest to power systems.
Gas insulated substations offer other advantages in addition to the reduced space requirements. It can be installed in a small space in cities or buildings. Jan 26, 2018 this feature is not available right now. The author in his paper has made comparison of gas insulated substation.
Quality of the materials, dimension of grooves and oseals are important to ensure gas tight performance of gas insulated substation. Gas insulated substation control and monitoring cedengineering. An introduction to gas insulated electrical substations. It occupies very less space 110th compared to ordinary substations. Jan 02, 2014 quality of the materials, dimension of grooves and oseals are important to ensure gas tight performance of gas insulated substation. Substation extensions and retrofits low profile substations azz gib system advantages. Gis highvoltage gas insulated switchgear substations. Institute of aeronautical engineering autonomous dundigal, hyderabad 500 043.
Gas insulated substations transmission distribution. Introduction for highvoltage transmissions, gasinsulated switchgears giss are extremely advantageous and have been highly developed. Gis technology originated in japan, where there was a substantial need to develop technology to make substations as compact as possible. The high voltage conductors, circuit breaker interrupters, switches, current transformers, and voltage transformers are in sf6 gas inside grounded metal enclosures. Gas insulated substation gis advantages disadvantages. No internal switching or breaking capability is needed.
This course provides an brief introductory overview of gis or gas insulated substations. Practical and theoretical aspects are handled by acknowledged gis experts who have been involved with the technology from the. Presented paper refers to service continuity of gas insulated substations, a topic which is also dealt in annex f of iec international standard no. It is suitable for both indoor and outdoor applications. Abb gas insulated switchgear elk4, 800 kv 3 abb and 50 years of gas insulated switchgear gis innovation abb offers a wide range of highvoltage products up to 1200 kv kilovolt that help enhance the reliability, efficiency and quality of power in transmission and distribution grids, power plants and industries while minimizing environmental. Introduction for highvoltage transmissions, gas insulated switchgears giss are extremely advantageous and have been highly developed. The main advantage of this gas insulated substation is because of its compact size due to a high dielectric strength of the sf 6 gas. 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. With low environmental impact and an extremely compact footprint, the gis design addresses.
Gimes technology is not very recent invention, it is successfully running for over thirty years. Due to its enclosed construction, gas insulated substation is operable under. The basic insulation level bil required for a gas insulated substation gis is different from that of the conventional substation because of certain unique properties of the former. Lsis has been a leader of development of industry and best partner to improve productivity for her customers by supplying reliable and stable energy lsis is producing gis, which is one of the major equipment used in the high voltage substation in densely cities.
Installation of sf6 insulated switchgear has very largely increased all over the world, because of the advantages. 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. Gas insulated substation market 2025 by types, application. The technical specification for the civil engineering and building design and construction of secondary. This selfcontained, totally insulated unit comprises. Gas insulated substations advantages disadvantages. An alternating current ac voltage exceeding volts measured. The individual modules are connected in such a way that subsequent expansion or the conversion of a substation can be carried out easily. 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. Generally gas insulted substations gis are indoor type as it requires 110th of the space required for conventional substations. Scott will work on development of a scope for approval at the 2015 substation committee meeting, may 1721 in minneapolis. Fuji electric as a manufacturer of comprehensive substation equipment is ready to supply advanced sf6 gas insulated switchgear gis superior in reliability, disaster prevention, safety and environmental harmony. For rated voltages below 420 kv, this cost advantage in the favour of sf6. An overview on gis gas insulated substation engineering.
There are five major considerations in the differences between the two high voltage substations. The speakers will discuss reliability and system planning implications for gas insulated substations. The only purpose of the gil is electric power transmission. To enable digital substation, the elk4 can be equipped with control, protection and communication into substation. They will compare substation safety and security using ais vs. The metalenclosed gas insulated switchgear inherently follows the criteria for new substation design and offers a higher reliability and flexibility than other solutions.
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