Only sf6 insulated switchgear is able to fulfill these requirements. Sf6 gas superior dielectric properties used at moderate pressure for phase to phase and phase to ground insulation preferred for voltage ratings of 72. 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. 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 miscellaneous category includes ct failure, external faults, overloads, and damage in shipment.
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. Gas insulated substation provides a solution to the space problem. The portfolio includes gis solutions from 60 to 800 kv, along with secondary products to maximize switchgear and network operation. Welcome to toshiba international corporations download site. 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. In gas insulated substation the highvoltage conductors, circuit breaker interrupters, switches, current transformers, voltage transformers and lightning arresters. Product brochure gasinsulated switchgear elk4, 800 kv. Study of gas insulated substation and its comparison with air. A gas insulated substation gis is a substation that uses a superior dielectric gas, sulfur hexafluoride sf6,high voltage. Some of the failures are due to the presence of metallic particles inside the gis compartment. 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. Sulphur hexaflouride sf6 gas the primary insulating medium. Substation design volume ii physical layout instructor. A substation is a part of an electrical generation, transmission, and distribution system.
Since gasinsulated switchgear gis and gas circuit breaker gcb have been widely applied to substation equipment, advanced technologies for high. Study of gas insulated substation and its comparison with. Ieee xplore, delivering full text access to the worlds highest quality technical literature in engineering and technology. Modular online condition monitoring system for gas insulated. You may enter your filters below to locate manuals, brochures, software, drawings, and other important documents.
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. 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. 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. Ge provides a full range of gas insulated substations gis for utilities and industries worldwide. 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. Between the generating station and consumer, electric power may flow through several substations at different voltage levels. Contents what is a switchgear what is a gis why sf6 features of siemens 8da10 gis benefits of gis references. A typical gas insulated substation is shown in fig. The 20 chapters are written for engineers and present full overviews of each topic, with lists of further references. There are five major considerations in the differences between the two high voltage substations. 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. Emerging technologies in high voltage gas insulated switchgear. Ge provides a full range of gasinsulated substations gis for utilities and industries worldwide.
Purpose share status on replacement of sf6 with environmentally friendly insulating gas for high voltage gis and breakers. Estimation and analysis of vfto at various locations in 2kv gis substation. 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 ieee. Delft university of technology asset health index and risk. Register to view our materials and keep informed with our latest updates. However, the importance of topics covered varies with application category. Annual meeting scottsdale, az ieee std 980 guide for oil containment systems i0 gave a tutorial on transmission shunt compensation. Power conversion and control of wind energy systems ieee press. The defect can be generated in gis during production, maintenance.
Gas insulated substation equipment is not included. Insulation coordination for uhv gas 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. The guide was approved by ieee standards board in 2011. Tom antonucci for the benefit of ieee, particularly the student members, with an interest to power systems. Gas insulated switchgear gis has been known to be reliable for more than 40years. The conversion from dew point td, in oc into ppmv was based on the magnus. The substations committee is the professional home for all engineers involved in the design and operation of generation, transmission and distribution substations. Several crucial terms are for better understanding of the presented material.
Through xray detection and disassemble examination of the damaged cb, it is found that the aphase moveable contact was not opened completely. Furthermore, it provides an insight in the ongoing standardization activities and describes applications in converter and. 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. After a thorough re view, it was decided to convert the main outdoor ais to an indoor gasinsulated switchgear gis substation to support the. Substation project basic concepts process starts with a need. Estimation and analysis of vfto at various locations in 2kv gis. However, air insulated substations also offer many advantages. Winding and tap changers account for 70% of failures. Lsis who has been a leader in electricity and automation.
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. 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. A gas tight barrier insulator in switchgear serve for the separation of gas compartments and prevents neighbouring switchgear parts from being affected during maintenance. Companies also elect to use gis because of the increased load and limited space present in the urban areas. 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. 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. Download citation gas insulated substation gis gis technology is typically of. Conversion of 230 kv switchyard to gasinsulated substation in a gas plant abstract. Loose connections are included as the initiating event, as well as insulation failures. Gas insulated transformer use sf6 gas as the insulating and cooling medium instead of insulating oil. Presented paper refers to service continuity of gasinsulated substations, a topic which is also dealt in annex f of iec international standard no. The clearance required for phase to phase and phase to ground for all equipment is. 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.
Spacer flashover in gas insulated switchgear gis tu delft. By applying sulfur hexafluoride sf6 gas to substation equipment like circuit breakers and switchgear, downsizing and lower maintenance costs can be achieved. Substations transform voltage from high to low, or the reverse, or perform any of several other important functions. 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. Included is equipment that is part of primary and secondary unit substations. 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. Study have humiditycontent above the value recommended by ieee and. 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. Presented paper refers to service continuity of gas insulated substations, a topic which is also dealt in annex f of iec international standard no.
Gasinsulated substation article about gasinsulated. For higher voltages, gas insulated switch gear reduces the space required around live bus. This course is based on terms used in ieee and iec regulations. Abstract gas insulated substations provide a best solution to the problem of reduced land availability in the metropolitan areas. 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. Switchgear gis by akinwande, quadri olufemi power plant, dangote cement plc, ibese. The differences between air insulated substation engineering and gas insulated substation engineering are vast. Is that the highvoltage current carrying parts are within a metal enclosure and are held in a concentric configuration by cast epoxy spacer.
Gas insulated substation market 2025 by types, application. Gas insulated substation gis advantages disadvantages. The substations committee is one of the technical committees under the direction of the technical council of the ieee power and energy society. 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.
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. The footprint of conventional substation is enormous, and gis technology allows a significant size reduction. Pd test in gas insulated substation using uhf method ieee. Where land is costly, such as in urban areas, gas insulated switchgear may save money overall. This guide is applicable to all gasinsulated substations gis above 52 kv. Working group formation and par generation for revision of this guide is expected to begin in 2016. Ieee pes substations committee gasinsulated substations. Practical and theoretical aspects are handled by acknowledged gis experts who have been involved with the technology from the. A transmission station may have transformers to convert between two. 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. The higher the voltage, the more favorable gas insulated technology becomes.
The application of gas insulated substation gis has become very crucial for the energy supply companies in the present scenario. Work jointly with switchgear committee on ratings of breakers for gas insulated substations. An overview on gis gas insulated substation engineering. It is ideal in dense urban areas where land for new facilities is limited and only available at prohibitive cost. 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, highvoltage. Iec 62271203 highvoltage switchgear and controlgear part 203. Overview of development, design, testing and application of. 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. Sck0 gas insulated substations ieee pes substations. Up to now, no standards for testing of gasinsulated dc systems are. Gis is now in widespread use in the electrical power industry, especially in metropolitan areas.
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 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 health index model hi model for gasinsulated switchgear gis. In this standard, metalclad switchgear will be called mc switchgear. Practical and theoretical aspects are handled by acknowledged gis experts who have been involved with the technology from the start. Often, building new substations or increasing capacity is. The guide is presently complete and available through ieeesa.
Economics between conventional and gas insulated substation. Sep 22, 2015 this standard is concerned with enclosed, rather than open, indoor and outdoor switchgear assemblies rated above v ac. Substation engineering ais and gis substations beta. With gis experience spanning 50 years across a wide range of industries and applications, ge is a leader in the. High voltage underground cables for power transmission have been in use for many years and number of different technologies have developed over the years. Modular online condition monitoring system for gas insulated switchgear.
321 498 1583 1295 637 752 1141 417 1329 625 1253 1299 1146 79 864 398 1579 696 1120 1438 1148 1402 958 1222 771 297 721 578 1072 370 1253 522 1469 1264 1172 1343 604 43 349 146 1103 461 456 1312