All rus borrowers rus electric staff effective date. The input for a distribution substation is typically at least two transmission or subtransmission lines. There are several different supply voltages that are used and they are addressedby the regulations. 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. Between the generation and distribution, the voltage may vary through several substations. We believe that although many gis manufacturers produce a product similar to ours, it is our ability of giving you a high quality system at a reasonable price that sets us apart.
The new substation t he electricity grid was invented in the 19th century and greatly expanded in the 20th. Electric substations with equipment used to convert highvoltage, extrahighvoltage ehv, or ultrahighvoltage uhv transmission lines to the intermediate voltage subtransmission lines or to switch subtransmission circuits operating at voltages in the range of 34. Substation design volume ii physical layout instructor. This bulletin is an update and revision of previous rea bulletin 651, design guide for rural substations. Gis units are under various stages of installation. Substation layout substation layout single line diagram check. Apr 01, 2015 detailed presentation of the t155 420 kv gis. The high voltage conductors, circuit breaker interrupters, switches, current transformers, and voltage transformers are in sf6 gas inside grounded metal enclosures. This bulletin is an update and revision of previous rea bulletin 651, design guide for rural substations revised june 1978. Gasinsulated switchgear up to 245 kv, 50 ka, 4000 a type 8dn9. Ergon energy corporation limited abn 50 087 646 062 ergon energy queensland pty ltd abn 11 121 177 802. What is a electrical substation definition, layout, and. Gasinsulated metalenclosed switchgear for rated voltages above 52 kv 092011 orequired leakage rate substation design manual is not intended to replace asset management standards, but rather to act as a reference document that crossreferences existing standards and process documentation and plugs any gaps where asset management documentation does not exist. Distribution substations michigan technological university.
They are applied to isolate different elements of the substation, such as circuit. With minimum flexibility in the layout arrangement it shall be possible to remove the circuit breaker with both busbars remaining in service and it shall be possible to remove the disconnector of the busbars, with one bus bar remaining in service. When the space available for the installation of the substation is short or when the environmental conditions are extremely severe the usual solution is to install a gis gas insulated substation. Modular substation technical data 2 tgqdmk000410 contents. Highvoltage substations highvoltage power transmission. In plan layout of direct stroke lightning protection, the whole area of substation should be covered by shield wire and masts.
The first obvious difference is that the blades of the disconnect switches and the earthing switches installed in a gis substation are surrounded by. The collector substation can also provide power factor correction if it is needed, metering and control of the wind farm. Details of transient earthing details and any special. Our indepth knowledge of the power value chain, as well as grid codes and utility practices in use around the world, enable us to provide turnkey. Gas insulated substation definitions and basics course no. 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. Gis components gas insulated substations gis use circuit breakers, disconnect switches and grounding switches, and have various means of indicating their position. Operation and maintenance of a gas insulated substation. Provided the technician doesnt need to handle the gas itself, gis substations are quicker to install. Asea brown boveri abb, together with its partners and suppliers, has developed the heart of such a system a gasinsulated switchgear gis design that. Gis highvoltage gas insulated switchgear substations. Acknowledgements this is the final report for the power systems engineering research center pserc research project titled the 21st century substation design. Vuspec summary this new comprehensive collection represents the most complete resource available for professional engineers looking for best practices and techniques covering design.
Substation configuration reliability 1 reliability of substation configurations daniel nack, iowa state university, 2005 introduction while one of the strongest points in a power system is the electric substation. For this design type, over 14,000 bays of gis have been put into service in power stations and. Nesco has adopted the philosophy of installing open terminal air insulated substations. National grid substations technical specification ngts 2. Abb substations with gasinsulated switchgear gis are unmatched when it comes to compactness, reliability, efficiency and safety, ensuring maximum power availability for utility, commercial and industrial customers. When the space available for the installation of the substation is short or when the environmental conditions are extremely severe the usual solution is to install a gis gas insulated substation, which schematic diagram is shown in figure 3. Abbs sf6 gasinsulated switchgear technology has been proving its worth, day in and day. They step down the ehv to hv as per the requirement of the customers. Oct 11, 2012 in a substation surge arrester is located at the starting of the substation as seen from incoming transmission lines and is the first equipment of the substation. The substation design manual is not intended to replace asset management standards, but rather to act as a reference document that crossreferences existing standards and process documentation and plugs any gaps where asset management documentation does not exist. Substation conventional substations ais limitations of ais the need for gis introduction to gis properties of sf6 gis assembly advantages of gis design features drawbacks sf6 environmental concerns sf6 n2 mixtures future trends in gis conclusion.
Abb substations with gasinsulated switchgear gis are unmatched when it comes to. The electrical substation does not have a single circuit but is composed of numerous outgoing and incoming circuits which are connected to a busbar i. Gis comprises of all energized parts including disconnectors, earth switches, circuit. Very fast transient over voltage vfto is a unique electromagnetic transient phenomenon occurring in gas insulated substation gis, which determines the insulation level of the gis.
Drawing title 25251400 singer substation arrangement plan 25251401 singer substation sections 1 and 2 25251402 singer substation section 3 gis enclosure 25251500 singer substation grading plan 25251501 singer substation. Highvoltage substations, the node points of todays complex power transmission infrastructure, play a key role in meeting this demand safely and reliably. Within this of voltage variety assortment, only several gas densities of sf6gas. Different layouts for substation the substation is the part of an electrical supply system which transmits the high voltage from the generating substations to the local distribution networks. Due to this, some gis arrangements are grouped to address several voltage ratings. Distribution substation a distribution substation transfers power from the transmission system to the distribution system of an area. Our units are currently used in urban areas, closely builtup industrial areas, underground power substations. Substation layout free download as powerpoint presentation. Expected lifetime of gis stateoftheart o n 145 kv 1968 145 kv expected life time of gis number of installed bays s evoluti acc to cigre study the image cannot be displayed.
Integrated gis for 145 420 kv gasinsulated switchgear abb. Hv gas insulated switchgear gis technical data part 3. Placement of switchyard control room placement fire fighting pump house placement dg set placement lt station placement acdb, dcdb. 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. Gasinsulated switchgear type elk14 the modular system for gis. Both ais and gis installations use circuit breakers, disconnect switches isolators, and earthing switches, and have different means of showing their status, either opened or closed. Getco, the state transmission company of gujarat is the customer.
The quality of our gas insulated switchgear is the result of a rigorous standard quality management system, which has been certified in accordance with iso 9001. Xdge provides gas insulated switchgear gis solutions for high to ultra highvoltage power transmission. One equipment technical standard addressing rated voltages of 110 kv, 123 kv, 8 kv, and 145 kv, is describedby the same class of gis with the same case. Design and material assure extreme low leakage rate functionality and environmental protection design and material assure extreme low leakage rate iec 62271203 highvoltage switchgear and controlgear part 203. Integrated gis for 145 420 kv gasinsulated switchgear. Definition o majority of equipment is preassembled and pretested equipment and typically housed in ehouse o footprint significantly smaller than traditional substation with components more closely spaced o gis or hybrid gis on high voltage line side o less civil works required than traditional substation. Restart your computer, and then open the file again. The modular of design of gis offers a high degree of flexibility to meet layout requirements of both substations, as well as power station switchgear, making efficient use of available space. Numbers of breakers, disconnect switches, transformers, auxiliaries, protective devices, lines and other equipment. Gasinsulated substations gis the atmospheric air insulation used in a conventional, airinsulated substation ais requires meters of air insulation to do what sf6 can do in centimeters. Appendix c table of contents substation drawings singer substation drawing no. Integrated gis, 145 kv and 170 kv h5 layout predesigned gasinsulated switchgear for permanent, temporary and mobile installations english pdf leaflet mobile integrated gasinsulated switchgear elk3, 420 kv grid expansion ofoten hammerfest, norway english pdf leaflet. Gasinsulated highvoltage switchgear gis is a compact metal. Gis there are two terms presented in iec gas insulated switchgear and.
Substation layout consists essentially in arranging a number of switchgear components in an ordered pattern governed by their function and rules of spatial separation. Very fast transient over voltage vfto is a unique electromagnetic transient phenomenon occurring in gas insulated substation gis, which determines the insulation level of the gis above 330 kv. Installing a gis high voltage substation can be faster than installing its metalclad ais counterpart. Surge arresters or lightning arresters discharge the over voltage surges to earth and protect the equipment insulation from switching surges and lightning surges. Operation of a gis substation involves the same principles as operati ng an. The robust and low maintenance gis based design minimizes the substations footprint by as much as 70 percent, enabling it to be installed indoors, in busy urban areas and in harsh environments. The siemens gasinsulated switchgear gis is an extremely successful.
Different layouts for substation radial, tapped, lilo. The fence is connected to a separate grounding conductor. This is largely due to the fact that gis systems are significantly smaller and weigh less despite the gas weighing more than air. The cost variation of the high voltage installation itself is relatively small and mainly influenced by the layout. Earth clearance this is the clearance between live parts and earthed structures, walls, screens and ground.
Transmission, sub transmission and distribution substation 4. Layout the first step in planning a substation layout is the preparation of a oneline diagram which shows in simplified form the switching and protection arrangement required, as well as the incoming supply lines and outgoing feeders or transmission lines. The substation layout shall make allowance for preventive or corrective maintenance within the outage constraints specified in clause 3. Pickett provides engineering services for substations from conceptual development through detail design and asbuilts. Access for maintenance shall be provided as follows. Wherever you are, siemens is your reliable partner for the onestop planning and construction of customized, stateoftheart highvoltage. Disconnect switches in a gis installation are used for the same function as those in an air insulated substation ais. Gas insulated switchgear ge grid solutions pdf catalogs. Gis technology has reached a stage of application and a wide range of gis. The ergon energy design philosophy is to provide substations. Operation of a gis substation involves the same principles as operati ng an air insulated substation ais even though the different active elements are physically arranged differently. Main components of a gas insulated substation gis you. Sf 6 gas is an excellent insulating medium to be used between the encapsulation and the energized parts of gis unit.
We offer electrical design, physical layout, structure detailing, and 3d modeling to complement our design, surveying and lidar services for substations. Your computer may not have enough memory to open the image, or the image may have been corrupted. Gas insulated substation definitions and basics cedengineering. Dec, 2018 the electrical substation does not have a single circuit but is composed of numerous outgoing and incoming circuits which are connected to a busbar i. This is a 22066 kv large green field substation project based on hybrid gis technology with 3x100mva transformers. This highvariation is expensivefor substation design and should be cut downhence, the. Integrated gis technology up to 170 kv modular switchgear in prefabricated housing english pdf brochure integrated gis, 145 kv and 170 kv lilo layout predesigned gasinsulated switchgear for permanent, temporary and mobile installations english pdf leaflet integrated gis, 145 kv and 170 kv h5 layout. Thus, this is all about different types of substations and you can refer more information for substation layout. Gas insulated substation gis vs conventional outdoor substation ais by engr. Recognizing the grids complexity and relevance, the national academy of sciences declared the electricity system the worlds largest machine and placed it at the top of the list of the. With gis experience spanning 50 years across a wide range of industries and applications, ge is a leader in the. The substation receives electrical energy directly from generating stations through incoming power supply lines while it delivers electricity to the consumers.
The design based substations are indoor, outdoor, foundation mounted and pole mounted substations. Ge provides a full range of gasinsulated substations gis for utilities and industries worldwide. Pdf ultra highvoltage gasinsulated switchgear a technology. Surge arresters are also provided near the transformer terminals phase to ground. The project was successfully executed on time despite short execution schedule.
The enclosure shields the gis unit from the outside condition. General arrangement a designer perspective, but fine tuned at site. Gis substation design and execution hv and ehv gis. Gis technology originated in japan, where there was a substantial need to develop technology to make substations. High speed earthing switches are unique to gis design as they are not normally used in air insulated substations. Introduction sub stations are important link between generating stations and distribution networks.
Layout and detailed design drawing of the earthing system and connection points to the gis. Compact design ideal for space constrained projects in crowded. And it should be noted that cost, reliability, operational. Distribution voltages are typically medium voltage, between 2. In sectional layout of dslp of substation, actual view of how all equipments are protected from lightning stroke. Gas insulated switchgear is used in industrial areas to fulfil highenergy demands by space saving design. Gas insulated substations gis differ from air insulated substations substations we usually see such that all the substation equipment such as busbars, circuit breakers, current transformer, potential transformers and other substation. Substation conventional substations ais limitations of ais the need for gis introduction to gis properties of sf6 gis assembly advantages of gis design features drawbacks sf6 environmental concerns sf6 n2 mixtures future trends in gis. A gasinsulated substation gis uses a superior dielectric gas, sf6, at moderate pressure for phasetophase and phasetoground insulation.
The design of distribution voltage switchgear and gas insulated switchgear gis is described in chapter, in which terminology is also defined. According to the author gis are much more reliable, compact and maintenance free. In a substation surge arrester is located at the starting of the substation as seen from incoming transmission lines and is the first equipment of the substation. Stability of the system, reliability of power depends on the type of layout chosen and components used in the sub stations. The considerably larger variation for the complete. Riaz ahsan baig year of publication 2004 0 abstract the author in his paper has made comparison of gas insulated substation gis with conventional air insulated substation ais. 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. This arrangement allows each line to be connected to busbar a andor b, depending on circuitbreaker status. This equipment is a compact multicomponent assembly, enclosed in a ground metallic housing, which.
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