Details of transient earthing details and any special. 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 layout substation layout single line diagram check. 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 considerably larger variation for the complete. In plan layout of direct stroke lightning protection, the whole area of substation should be covered by shield wire and masts. Gis comprises of all energized parts including disconnectors, earth switches, circuit. Layout and detailed design drawing of the earthing system and connection points to the gis. Gis technology has reached a stage of application and a wide range of gis. The robust and low maintenance gis based design minimizes the substation. 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. The collector substation can also provide power factor correction if it is needed, metering and control of the wind farm. The gis shall be so designed that any component of the gis can be removed easily. The project was successfully executed on time despite short execution schedule.
Substation design volume ii physical layout instructor. 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. The new substation t he electricity grid was invented in the 19th century and greatly expanded in the 20th. Substation layout consists essentially in arranging a number of switchgear components in an ordered pattern governed by their function and rules of spatial separation. Gasinsulated switchgear up to 245 kv, 50 ka, 4000 a type 8dn9. They are applied to isolate different elements of the substation, such as circuit.
There are several different supply voltages that are used and they are addressedby the regulations. The input for a distribution substation is typically at least two transmission or subtransmission lines. Abb substations with gasinsulated switchgear gis are unmatched when it comes to. Nesco has adopted the philosophy of installing open terminal air insulated substations. This bulletin is an update and revision of previous rea bulletin 651, design guide for rural substations revised june 1978. All rus borrowers rus electric staff effective date. Placement of switchyard control room placement fire fighting pump house placement dg set placement lt station placement acdb, dcdb. Ge provides a full range of gasinsulated substations gis for utilities and industries worldwide.
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. For this design type, over 14,000 bays of gis have been put into service in power stations and. Integrated gis for 145 420 kv gasinsulated switchgear abb. Within this of voltage variety assortment, only several gas densities of sf6gas. Gis technology originated in japan, where there was a substantial need to develop technology to make substations as compact as possible. The first obvious difference is that the blades of the disconnect switches and the earthing switches installed in a gis substation are surrounded by. Installing a gis high voltage substation can be faster than installing its metalclad ais counterpart. This is largely due to the fact that gis systems are significantly smaller and weigh less despite the gas weighing more than air. This is a 22066 kv large green field substation project based on hybrid gis technology with 3x100mva transformers. The substation receives electrical energy directly from generating stations through incoming power supply lines while it delivers electricity to the consumers. Main components of a gas insulated substation gis you. Hv gas insulated switchgear gis technical data part 3. Gas insulated substation gis vs conventional outdoor substation ais by engr. Numbers of breakers, disconnect switches, transformers, auxiliaries, protective devices, lines and other equipment.
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. Highvoltage substations, the node points of todays complex power transmission infrastructure, play a key role in meeting this demand safely and reliably. Your computer may not have enough memory to open the image, or the image may have been corrupted. Distribution substation a distribution substation transfers power from the transmission system to the distribution system of an area. Operation and maintenance of a gas insulated substation. Different layouts for substation radial, tapped, lilo.
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. 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. Gas insulated switchgear ge grid solutions pdf catalogs. 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. They step down the ehv to hv as per the requirement of the customers. Thus, this is all about different types of substations and you can refer more information for substation layout. General arrangement a designer perspective, but fine tuned at site. Surge arresters are generally connected between phase conductor and ground. Xdge is one of the most reliable gas insulated switchgear suppliers with. Surge arresters or lightning arresters discharge the over voltage surges to earth and protect the equipment insulation from switching surges and lightning surges.
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. 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. The ergon energy design philosophy is to provide substations. 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. The common gis high voltage ratings can be classified into four design parts or. 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.
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. Gas insulated substation definitions and basics cedengineering. What is a electrical substation definition, layout, and. The design of distribution voltage switchgear and gas insulated switchgear gis is described in chapter, in which terminology is also defined. Substation design challenges an analysis of substation design criteria can demonstrate the bene. Gis technology originated in japan, where there was a substantial need to develop technology to make substations. According to the author gis are much more reliable, compact and maintenance free. Wherever you are, siemens is your reliable partner for the onestop planning and construction of customized, stateoftheart highvoltage. In sectional layout of dslp of substation, actual view of how all equipments are protected from lightning stroke. The cost variation of the high voltage installation itself is relatively small and mainly influenced by the layout. 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. Gis substation design and execution hv and ehv gis. A gasinsulated substation gis uses a superior dielectric gas, sf6, at moderate pressure for phasetophase and phasetoground insulation.
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. Xdge provides gas insulated switchgear gis solutions for high to ultra highvoltage power transmission. Abbs sf6 gasinsulated switchgear technology has been proving its worth, day in and day. 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. Earth clearance this is the clearance between live parts and earthed structures, walls, screens and ground. The enclosure shields the gis unit from the outside condition. 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. This highvariation is expensivefor substation design and should be cut downhence, the. 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.
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. Distribution substations michigan technological university. The siemens gasinsulated switchgear gis is an extremely successful. 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. Integrated gis for 145 420 kv gasinsulated switchgear. Gis components gas insulated substations gis use circuit breakers, disconnect switches and grounding switches, and have various means of indicating their position. This arrangement allows each line to be connected to busbar a andor b, depending on circuitbreaker status. The portfolio includes gis solutions from 60 to 800 kv, along with secondary products to maximize switchgear and network operation. 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.
Acknowledgements this is the final report for the power systems engineering research center pserc research project titled the 21st century substation design. Gis there are two terms presented in iec gas insulated switchgear and. Vuspec summary this new comprehensive collection represents the most complete resource available for professional engineers looking for best practices and techniques covering design. Compact design ideal for space constrained projects in crowded. Due to this, some gis arrangements are grouped to address several voltage ratings. Our units are currently used in urban areas, closely builtup industrial areas, underground power substations. Introduction sub stations are important link between generating stations and distribution networks. Access for maintenance shall be provided as follows.
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. Disconnect switches in a gis installation are used for the same function as those in an air insulated substation ais. Restart your computer, and then open the file again. Sf 6 gas is an excellent insulating medium to be used between the encapsulation and the energized parts of gis unit. Gas insulated substation definitions and basics course no. Getco, the state transmission company of gujarat is the customer. 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.
Gas insulated switchgear is used in industrial areas to fulfil highenergy demands by space saving design. 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. Gasinsulated highvoltage switchgear gis is a compact metal. High speed earthing switches are unique to gis design as they are not normally used in air insulated substations. Gis units are under various stages of installation. The design based substations are indoor, outdoor, foundation mounted and pole mounted substations. This equipment is a compact multicomponent assembly, enclosed in a ground metallic housing, which. 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. The high voltage conductors, circuit breaker interrupters, switches, current transformers, and voltage transformers are in sf6 gas inside grounded metal enclosures.
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. 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. Transmission, sub transmission and distribution substation 4. Apr 01, 2015 detailed presentation of the t155 420 kv gis.
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. This bulletin is an update and revision of previous rea bulletin 651, design guide for rural substations. Pickett provides engineering services for substations from conceptual development through detail design and asbuilts. 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. Pdf ultra highvoltage gasinsulated switchgear a technology. 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. Provided the technician doesnt need to handle the gas itself, gis substations are quicker to install.
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. Modular substation technical data 2 tgqdmk000410 contents. Ergon energy corporation limited abn 50 087 646 062 ergon energy queensland pty ltd abn 11 121 177 802. Asea brown boveri abb, together with its partners and suppliers, has developed the heart of such a system a gasinsulated switchgear gis design that. The fence is connected to a separate grounding conductor. Gis highvoltage gas insulated switchgear substations. Operation of a gis substation involves the same principles as operati ng an. Substation layout free download as powerpoint presentation.
We offer electrical design, physical layout, structure detailing, and 3d modeling to complement our design, surveying and lidar services for substations. National grid substations technical specification ngts 2. With gis experience spanning 50 years across a wide range of industries and applications, ge is a leader in the. Gasinsulated switchgear type elk14 the modular system for gis. And it should be noted that cost, reliability, operational. 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. Highvoltage substations highvoltage power transmission. 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 layout shall make allowance for preventive or corrective maintenance within the outage constraints specified in clause 3. 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 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. 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.
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