Purpose share status on replacement of sf6 with environmentally friendly insulating gas for high voltage gis and breakers. This guide is applicable to all gasinsulated substations gis above 52 kv. 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. Substation design volume ii physical layout instructor. The guide was approved by ieee standards board in 2011. 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.
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. 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. 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. 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. Substations transform voltage from high to low, or the reverse, or perform any of several other important functions. Estimation and analysis of vfto at various locations in 2kv gis. Economics between conventional and gas insulated substation. Study of gas insulated substation and its comparison with. 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. 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. This course is based on terms used in ieee and iec regulations. Gas insulated substation gis advantages disadvantages. 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. Iec 62271203 highvoltage switchgear and controlgear part 203.
By applying sulfur hexafluoride sf6 gas to substation equipment like circuit breakers and switchgear, downsizing and lower maintenance costs can be achieved. Often, building new substations or increasing capacity is. 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. Abstract gas insulated substations provide a best solution to the problem of reduced land availability in the metropolitan areas. The defect can be generated in gis during production, maintenance. Presented paper refers to service continuity of gasinsulated substations, a topic which is also dealt in annex f of iec international standard no. Pd test in gas insulated substation using uhf method ieee. Gas insulated substation provides a solution to the space problem. In gas insulated substation the highvoltage conductors, circuit breaker interrupters, switches, current transformers, voltage transformers and lightning arresters. A gas insulated substation gis is a substation that uses a superior dielectric gas, sulfur hexafluoride sf6, highvoltage. After a thorough re view, it was decided to convert the main outdoor ais to an indoor gasinsulated switchgear gis substation to support the. The 20 chapters are written for engineers and present full overviews of each topic, with lists of further references.
You may enter your filters below to locate manuals, brochures, software, drawings, and other important documents. Several crucial terms are for better understanding of the presented material. This gas has a higher insulating value than air, allowing the dimensions of the apparatus to be reduced. This standard is concerned with enclosed, rather than open, indoor and outdoor switchgear assemblies rated above v ac. Only sf6 insulated switchgear is able to fulfill these requirements. Gis there are two terms presented in iec gas insulated switchgear and ieee gas insulated substations.
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. Lsis who has been a leader in electricity and automation. Presented paper refers to service continuity of gas insulated substations, a topic which is also dealt in annex f of iec international standard no. Practical and theoretical aspects are handled by acknowledged gis experts who have been involved with the technology from the. Through xray detection and disassemble examination of the damaged cb, it is found that the aphase moveable contact was not opened completely. Up to now, no standards for testing of gasinsulated dc systems are. Ge provides a full range of gas insulated substations gis for utilities and industries worldwide. Since gasinsulated switchgear gis and gas circuit breaker gcb have been widely applied to substation equipment, advanced technologies for high. Register to view our materials and keep informed with our latest updates. Included is equipment that is part of primary and secondary unit substations. Gas insulated substations euci conference 2020 in anaheim. Modular online condition monitoring system for gas insulated switchgear.
The miscellaneous category includes ct failure, external faults, overloads, and damage in shipment. Estimation and analysis of vfto at various locations in 2kv gis substation. Power conversion and control of wind energy systems ieee press. Loose connections are included as the initiating event, as well as insulation failures. Ieee xplore, delivering full text access to the worlds highest quality technical literature in engineering and technology. Where land is costly, such as in urban areas, gas insulated switchgear may save money overall. An overview on gis gas insulated substation engineering ieee. Furthermore, it provides an insight in the ongoing standardization activities and describes applications in converter and. Gas insulated switchgear gis has been known to be reliable for more than 40years. Practical and theoretical aspects are handled by acknowledged gis experts who have been involved with the technology from the start.
Tom antonucci for the benefit of ieee, particularly the student members, with an interest to power systems. 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. A gas insulated substation gis is a substation that uses a superior dielectric gas, sulfur hexafluoride sf6,high voltage. 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. For higher voltages, gas insulated switch gear reduces the space required around live bus. Switchgear gis by akinwande, quadri olufemi power plant, dangote cement plc, ibese. The application of gas insulated substation gis has become very crucial for the energy supply companies in the present scenario. The portfolio includes gis solutions from 60 to 800 kv, along with secondary products to maximize switchgear and network operation.
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. Sf6 gas superior dielectric properties used at moderate pressure for phase to phase and phase to ground insulation preferred for voltage ratings of 72. Insulation coordination for uhv gas insulated substation. 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. A gas tight barrier insulator in switchgear serve for the separation of gas compartments and prevents neighbouring switchgear parts from being affected during maintenance. Winding and tap changers account for 70% of failures. Gas insulated transformer use sf6 gas as the insulating and cooling medium instead of insulating oil. Spacer flashover in gas insulated switchgear gis tu delft. A typical gas insulated substation is shown in fig.
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. 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. 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. Sep 22, 2015 this standard is concerned with enclosed, rather than open, indoor and outdoor switchgear assemblies rated above v ac. Welcome to toshiba international corporations download site. 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 clearance required for phase to phase and phase to ground for all equipment is. Gasinsulated substation article about gasinsulated.
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. 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 substation equipment is not included. Product brochure gasinsulated switchgear elk4, 800 kv. There are five major considerations in the differences between the two high voltage substations. Between the generating station and consumer, electric power may flow through several substations at different voltage levels. An overview on gis gas insulated substation engineering. Some of the failures are due to the presence of metallic particles inside the gis compartment. The substations committee is the professional home for all engineers involved in the design and operation of generation, transmission and distribution substations. Instead of bare conductors, bus and apparatus are built into pressurized tubular containers filled with sulfur hexafluoride sf 6 gas. 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. Overview of development, design, testing and application of. Annual meeting scottsdale, az ieee std 980 guide for oil containment systems i0 gave a tutorial on transmission shunt compensation. With gis experience spanning 50 years across a wide range of industries and applications, ge is a leader in the.
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. Faced with increasing demands for reliability, improved aesthetics and security, the adoption of gas insulated substations gis by north american utilities is rapidly increasing. 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. 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. Work jointly with switchgear committee on ratings of breakers for gas insulated substations. Substation project basic concepts process starts with a need. A transmission station may have transformers to convert between two. Gas insulated substation market 2025 by types, application. Study of gas insulated substation and its comparison with air. Study have humiditycontent above the value recommended by ieee and. Select a category, choose a product family, then select from the list of available documents.
Working group formation and par generation for revision of this guide is expected to begin in 2016. Sulphur hexaflouride sf6 gas the primary insulating medium. Modular online condition monitoring system for gas insulated. Download citation gas insulated substation gis gis technology is typically of. 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. Delft university of technology asset health index and risk. 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. 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 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. The differences between air insulated substation engineering and gas insulated substation engineering are vast. Substation engineering ais and gis substations beta. Ieee pes substations committee gasinsulated substations. High voltage underground cables for power transmission have been in use for many years and number of different technologies have developed over the years.
However, air insulated substations also offer many advantages. The footprint of conventional substation is enormous, and gis technology allows a significant size reduction. Companies also elect to use gis because of the increased load and limited space present in the urban areas. Emerging technologies in high voltage gas insulated switchgear. The higher the voltage, the more favorable gas insulated technology becomes. The guide is presently complete and available through ieeesa. It is ideal in dense urban areas where land for new facilities is limited and only available at prohibitive cost. 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.
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