Tom antonucci for the benefit of ieee, particularly the student members, with an interest to power systems. Insulation coordination for uhv gas insulated substation. In this standard, metalclad switchgear will be called mc switchgear. Between the generating station and consumer, electric power may flow through several substations at different voltage levels. Gas insulated substations gis are widely used as important switchgear equipment because of its highly reliable, low space requirement, the risk factor is low and easy to maintenance, yet some failures have been reported. Jan 02, 2014 gas insulated substation uses sulfur hexafluoride sf6 gas which has a superior dielectric properties used at moderate pressure for phase to phase and phase to ground insulation. The substations committee is one of the technical committees under the direction of the technical council of the ieee power and energy society. Gas insulated substation provides a solution to the space problem. Gas insulated substation equipment is not included. Pd test in gas insulated substation using uhf method ieee. 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 switchgear gis has been known to be reliable for more than 40years.
What is a switchgear switchgear is a generic term and includes the entire range of switching devices and their combination with associated control, measuring, protecting and regulating. The 20 chapters are written for engineers and present full overviews of each topic, with lists of further references. Gis is now in widespread use in the electrical power industry, especially in metropolitan areas. Study of gas insulated substation and its comparison with air. Is that the highvoltage current carrying parts are within a metal enclosure and are held in a concentric configuration by cast epoxy spacer.
Included is equipment that is part of primary and secondary unit substations. A gas insulated substation gis is a substation that uses a superior dielectric gas, sulfur hexafluoride sf6,high voltage. Sck0 gas insulated substations ieee pes substations. The increase in demand for electricity and the growing energy density in metropolitan cities have made it necessary to extend the existing high voltage network right up to the consumer. Conversion of 230 kv switchyard to gasinsulated substation in a gas plant abstract. Study of gas insulated substation and its comparison with. The application of gas insulated substation gis has become very crucial for the energy supply companies in the present scenario. Sf6 gas superior dielectric properties used at moderate pressure for phase to phase and phase to ground insulation preferred for voltage ratings of 72.
Abb gasinsulated switchgear elk4, 800 kv 3 abb and 50 years of gasinsulated 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. Gas insulated substation gis advantages disadvantages. Substation engineering ais and gis substations beta. 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. The substations committee is the professional home for all engineers involved in the design and operation of generation, transmission and distribution substations. Since gasinsulated switchgear gis and gas circuit breaker gcb have been widely applied to substation equipment, advanced technologies for high. Companies also elect to use gis because of the increased load and limited space present in the urban areas. Products include gas circuit breakers, vacuum circuit breakers, power transformers, gas insulated substations, power electronics and electricity transmission technologies, generator services, uninterruptible power supplies and rail transportation.
Practical and theoretical aspects are handled by acknowledged gis experts who have been involved with the technology from the start. Lsis who has been a leader in electricity and automation. It is ideal in dense urban areas where land for new facilities is limited and only available at prohibitive cost. Winding and tap changers account for 70% of failures. Annual meeting scottsdale, az ieee std 980 guide for oil containment systems i0 gave a tutorial on transmission shunt compensation. Only sf6 insulated switchgear is able to fulfill these requirements. Gas insulated transformer use sf6 gas as the insulating and cooling medium instead of insulating oil. By applying sulfur hexafluoride sf6 gas to substation equipment like circuit breakers and switchgear, downsizing and lower maintenance costs can be achieved. 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. Economics between conventional and gas insulated substation.
High voltage underground cables for power transmission have been in use for many years and number of different technologies have developed over the years. Several crucial terms are for better understanding of the presented material. A health index model hi model for gasinsulated switchgear gis. Estimation and analysis of vfto at various locations in 2kv gis. Ieee pes substations committee gasinsulated substations. Gasinsulated metalenclosed switchgear for rated voltages above 52 kv 092011 orequired leakage rate 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. This course is based on terms used in ieee and iec regulations. Furthermore, it provides an insight in the ongoing standardization activities and describes applications in converter and. This study analyses a gas insulated switchgear explosion accident caused by a failure of the circuit breaker cb in a thermal power plant, which resulted in the explosion of the cb and the burning of the potential transformer pt. An overview on gis gas insulated substation engineering. 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 miscellaneous category includes ct failure, external faults, overloads, and damage in shipment. 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. Stepping down the voltage from transmission to the distribution level at the substations located near the actual consumers not only yields economic advantages, but also ensures reliable power supply. A typical gas insulated substation is shown in fig. Estimation and analysis of vfto at various locations in 2kv gis substation. After a thorough re view, it was decided to convert the main outdoor ais to an indoor gasinsulated switchgear gis substation to support the. Purpose share status on replacement of sf6 with environmentally friendly insulating gas for high voltage gis and breakers. 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. 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.
Gas insulated substations wiley ieee ieee std 11001999, ieee recommended practice for powering and grounding electronic equipment the ieee emerald book ieee recommended practice for grounding of industrial and commercial power systems ieee green book foundations for microstrip circuit design wiley ieee handbook of digital forensics of. This standard is concerned with enclosed, rather than open, indoor and outdoor switchgear assemblies rated above v ac. A substation is a part of an electrical generation, transmission, and distribution 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. In gas insulated substation the highvoltage conductors, circuit breaker interrupters, switches, current transformers, voltage transformers and lightning arresters. Power conversion and control of wind energy systems ieee press. Work jointly with switchgear committee on ratings of breakers for gas insulated substations.
Instead of bare conductors, bus and apparatus are built into pressurized tubular containers filled with sulfur hexafluoride sf 6 gas. This gas has a higher insulating value than air, allowing the dimensions of the apparatus to be reduced. With gis experience spanning 50 years across a wide range of industries and applications, ge is a leader in the. Switchgear gis by akinwande, quadri olufemi power plant, dangote cement plc, ibese. Overview of development, design, testing and application of. Through xray detection and disassemble examination of the damaged cb, it is found that the aphase moveable contact was not opened completely. The guide was approved by ieee standards board in 2011. 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. For higher voltages, gas insulated switch gear reduces the space required around live bus. Abstract gas insulated substations provide a best solution to the problem of reduced land availability in the metropolitan areas. 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. Up to now, no standards for testing of gasinsulated dc systems are. Download citation gas insulated substation gis gis technology is typically of.
Information of special relevance to planning, design, testing, installation, operation and maintenance of gasinsulated substations gis and equipment is provided in this guide, which is intended to supplement ieee std c37. Practical and theoretical aspects are handled by acknowledged gis experts who have been involved with the technology from the. Frequent failures and increased maintenance in a 30year old 230 kv air insulated switchyard ais of a large gas plant caused the existing installation to be unreliable to provide uninterrupted power supply to critical plant operations. This guide is applicable to all gasinsulated substations gis above 52 kv. Register to view our materials and keep informed with our latest updates. The portfolio includes gis solutions from 60 to 800 kv, along with secondary products to maximize switchgear and network operation. Substations transform voltage from high to low, or the reverse, or perform any of several other important functions. Ieee xplore, delivering full text access to the worlds highest quality technical literature in engineering and technology. A gas tight barrier insulator in switchgear serve for the separation of gas compartments and prevents neighbouring switchgear parts from being affected during maintenance. Ge provides a full range of gasinsulated substations gis for utilities and industries worldwide.
Iec 62271203 highvoltage switchgear and controlgear part 203. An electrical substation is an installation with electrical equipment capable of interrupting or establishing electrical circuits and changing the voltage, frequency, or other characteristics of the electrical energy flowing in the circuits. Solid insulation cables have limits when it comes to the voltage that can be carried safely, and oil impregnated paper cable are also limited in the capacity. A gas insulated substation gis is a substation that uses a superior dielectric gas, sulfur hexafluoride sf6, highvoltage. Presented paper refers to service continuity of gasinsulated substations, a topic which is also dealt in annex f of iec international standard no. Loose connections are included as the initiating event, as well as insulation failures. The defect can be generated in gis during production, maintenance. Spacer flashover in gas insulated switchgear gis tu delft. Faced with increasing demands for reliability, improved aesthetics and security, the adoption of gas insulated substations gis by north american utilities is rapidly increasing.
You may enter your filters below to locate manuals, brochures, software, drawings, and other important documents. Sep 22, 2015 this standard is concerned with enclosed, rather than open, indoor and outdoor switchgear assemblies rated above v ac. The higher the voltage, the more favorable gas insulated technology becomes. Often, building new substations or increasing capacity is. These air insulated substations ais differ from gas insulated substations gis in that the bus and equipment are more susceptible to the elements temperature, contamination, animals, etc. Ieee std 8372002 revision of ieee std 8371989 i eee standards 837tm ieee standard for qualifying permanent connections used in substation grounding published by the institute of electrical and electronics engineers, inc. With the use of gas insulated substations, energy supply companies can reduce their operating and maintenance costs and hence survive strongly in the competitive era. Gasinsulated substation article about gasinsulated. Welcome to toshiba international corporations download site. Substation design volume ii physical layout instructor. Modular online condition monitoring system for gas insulated.
Review, study, and document the design, application, installation, testing, operating and maintenance practices for gas insulated substations gis rated 1 kv and above, gas insulated transmission lines gil rated 72. An overview on gis gas insulated substation engineering ieee. Gas insulated substation market 2025 by types, application. Some of the failures are due to the presence of metallic particles inside the gis compartment. Emerging technologies in high voltage gas insulated switchgear. However, air insulated substations also offer many advantages. Product brochure gasinsulated switchgear elk4, 800 kv. The differences between air insulated substation engineering and gas insulated substation engineering are vast. However, the importance of topics covered varies with application category.
A transmission station may have transformers to convert between two. Ge provides a full range of gas insulated substations gis for utilities and industries worldwide. Sulphur hexaflouride sf6 gas the primary insulating medium. The conversion from dew point td, in oc into ppmv was based on the magnus. The clearance required for phase to phase and phase to ground for all equipment is. Working group formation and par generation for revision of this guide is expected to begin in 2016. Study have humiditycontent above the value recommended by ieee and. Delft university of technology asset health index and risk. The guide is presently complete and available through ieeesa. Gas insulated substations euci conference 2020 in anaheim. There are five major considerations in the differences between the two high voltage substations.
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