Installation, maintenance, and end of life of a gas. Substations the core of electrical power transmission. Gis substation construction, completion of second floor in one day. The assembly shall be of dead tank type, with all components of the switchgear, for example circuit breaker, bus bars, disconnect switches, grounding switches, and instrument transformers, housed in grounded metal enclosures. Prefabricated gasinsulated switchgear gis integrated gis is a prefabricated gasinsulated switchgear gis unit with housing is based on abbs wellproven gis technology and can be produced at the same speed as a conventional gis but has a considerably shorter installation time which is less than 50 percent of typical gis installations. 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, it still contains what could be described as weak points or points of failure that would lead to loss of load.
The 230kv and 69kv gis equipment was installed by the gis vendors. These substations are generally constructed in an open, nonenclosed, nonatmospherically controlled environment and. The portfolio includes gis solutions from 60 to 800 kv, along with secondary products to maximize switchgear and network operation. Viewing of contact position is provided on all disconnectors and earthing switches via windows fitted to the gis chambers using fixed or. The testing procedure is done to confirm the technical information as well as safe operation of the gis over its life duration. With gis experience spanning 50 years across a wide range of industries and applications, ge is a leader in the. Ageing of the system impact on planning of the working. Five differences between air insulated substations and gas. Easy extension work can be performed without any interruption of electric power by adopting modular design. Substations are a key element in the transmission and distribution of renewable energy.
Abbs largest ever 2 kv gis installation in the uk substations new compact gas insulated switchgear gis built within the existing footprint of a timeserved outdoor air insulated switchgear ais substation. All parts of the switchgear should be three phase enclosed for 220kv gis. Substation engineering ais and gis substations beta. The substation construction 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 plug any gaps where asset management documentation does not exist. Electrical works 400 kv substation chapter7 400 kv substation 1. Gasinsulated switchgear up to 550 kv, 63 ka, 5000 a type 8dq1. Gas insulated substation installation cedengineering. Gis gis gis the latest step in substation development comes with the introduction of the standard iec 6185092 for the process bus interface. Sep 10, 2019 substation safety best practices while most of the safety practices stem out of common sense and practical learning, some potential problem areas may skip attention. Getco e1,2,4,6ts gisr3 feb page 5 of 63 down complete substation and at least one busbar and the undisturbed bays must remain in operation.
The abb portfolio for gasinsulated high voltage switchgear comprises several. Gis technology and detail current design trends and maintenance solutions for gas insulated substations. Gis is now in widespread use in the electrical power industry, especially in metropolitan areas. Incorrect alignment causes problems during operation of mechanical linkages and connections, difficulty in removing and replacing circuitbreakers and other withdrawable parts and puts stress on interpanel. Jul 12, 2014 comparison of gis and ais substation 11. An overall installation process, including considerations for future extension of gis bays and equipment, is. Workers in a substation should be aware of the locations and vent paths of these devices to avoid being showered by debris in the vent pathways. The commissioning procedure is the general guideline that each engineer at firstenergy. Gas insulated substation or bus arrangements demand specific equipment for gas. Tasnetworks requires the design and application of ehv gis substation. Experience has shown the risk of mechanical damage due to transport, incorrect assembly, or inadvertently inserting particles or other foreign objects into the gis. Operating process for access to gas insulated switchgear transgrid. Gasinsulated switchgear elk04 modular system up to 170 kv.
Gas insulated substation installation ced engineering. Power cable installation guide figure f5 multiple sheaves figure f6 sheave arrangements for feeding into cable tray training radius the training radius is the final positioning of cable ends after the cable has been placed in the raceway. Incorrect alignment causes problems during operation of mechanical linkages and connections, difficulty in removing and replacing circuitbreakers and other withdrawable parts and puts stress on interpanel connections such as busbars and earth bars. Mod subs can be incorporated into an existing sub or used as a stand alone sub.
Ttr substations specializes in electrical and civil substation construction. The new 500220 kilovolt kv gasinsulated substation will dispatch 1. Commissioning process for new substation equipmenthayes. Installation, maintenance, and end of life of a gasinsulated substation. The arrangement of gas sections or compartments shall be such as to facilitate future expansion of incomer bay with any make on either end without any drilling, cutting or welding on the existing equipment. 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. Gis is also the more economic alternative when expanding or replacing existing substations.
Viewing windows shall be provided at the disconnectors and earthing switches. Local control cubicles lcc lcc is the interface cubicles to all secondary systems of a substation which are represent a station control and protection. With a rating of 170 kv, 4000 a, 50 ka, it is the perfect solution. Abbs largest indoor 2 kv substation spanning the full product ownership life cycle, abbs experienced multidisciplinary team of engineers and technicians is qualified and accredited to work on trackside installation, commissioning and maintenance projects. Lcc includes control and alarm functions as well as the correct distribution of auxiliary power supply for the relevant gis bay. Gis technology originated in japan, where there was a substantial need to develop technology to make substations as compact as possible. System architecture design is a process developed by esri to promote successful gis enterprise operations. Gis typically consists of modular components which undergo thorough factory testing and are then assembled to form a complete installation on site.
Installation, maintenance, and end of life of a gasinsulated. Fault current control since the substation is the origin point of circuits, faults on the circuit return to the substation. It should be designed for indoor application with meteorological conditions at site winter 3c to 14 c and summer 31 c to 46 c, seismic zone. The disconnect switches shall be provided with viewing windows for visual. The siemens gasinsulated switchgear gis is an extremely successful. Electrical bus system and electrical substation layout. The need in march 20, abb put the final finishing touches to a major. This means vertically and horizontally in both longitudinal and lateral directions. Abb gasinsulated switchgear elk04 modular system up to 170 kv, 4000.
The integrated gis is a prefabricated gasinsulated switchgear gis installation based on abbs wellproven gis technology that can be produced and installed in approximately 50 percent less time than a conventional gis substation. Lets take a look at some of the important safety measures that can minimise highrisk security threats commonly encountered in substations. 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. Lsis who has been a leader in electricity and automation. The sequence of installation will be determined by abb based on the installation and commissioning schedule and assembly drawings. One type of substation is an open air substation, which is the traditional design that uses the insulation properties of ambient air as an external insulating medium. Restart your computer, and then open the file again. 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. Nec high voltage gas insulated switchgear design requirement. While most of the safety practices stem out of common sense and practical learning, some potential problem areas may skip attention. Gas insulated switchgear is used in industrial areas to fulfil highenergy demands by space saving design with a. Ehv indoor gas insulated switchgear standard tasnetworks. The sf6 gas insulated metal enclosed switchgear shall be totally safe against inadvertent touch of any of its live constituent parts.
Jul 14, 2016 gis substation construction, completion of second floor in one day. To provide the function and safety the gis installation for which it was designed, the gis has to be tested. Generally, it is a common practice to have a manufacturers representative present during the installation to direct utility staff or contractors. Your computer may not have enough memory to open the image, or the image may have been corrupted. Before performing any electrical engineering activity one must prepare a method statement for electrical work that will describe scope of work, references, responsibilities, required materials and resources. Gas insulated medium voltage switchgear industrial solutions.
Our units are currently used in urban areas, closely builtup industrial areas, underground power substations of large commercial. Economics between conventional and gas insulated substation. Alternative installation methods for offshore wind substations author. The high voltage conductors, circuit breaker interrupters, switches, current transformers, and voltage transformers are in sf6 gas inside grounded metal enclosures. Utilizing both technical presentations and case studies from leading utilities, attendees will be provided with a sound understanding of gis capability as well as realworld examples involved in selecting and constructing gis substations. They transform voltage from high to low, or vice versa, and provide the ties, transformation, switching and protection of the transmission and distribution systems. Gis substations use sf6 gas that reduces the distance needed between active and nonactive switchgear parts, resulting in smaller overall space requirements. Gis substation also offers unique advantages over airinsulated applications. 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. Introduction and governing standard this presentation covers the technical requirements and design aspects of a gasinsulated substation gis as per governing standards of gis substations. This is a 23069kv, class h gasinsulated switchgear gis substation. Comparison of gis and ais systems for urban supply networks. More than 14000 installed bays in almost 2500 substations in over 70.
These limits should not be used for cables subjected to pulling tensions during installation. Abb is a world leader in the design, installation and commissioning of gas insulated switchgear gis and air insulated switchgear ais substations up to 800 kv including the negotiation of wayleaves and easements and all civil engineering works. The 20 chapters are written for engineers and present full overviews of each topic, with lists of further references. To guarantee the insulation strength of gas insulated substations gis, a number of different voltage waveforms, e. 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. According to iec 62271203 2003 8, p91 every newly installed part of a gis shall be subjected to a dielectric test on site. This process builds on your existing information technology it infrastructure and provides specific recommendations for hardware and network solutions based on existing and projected business user needs. The average installation time is reduced by approximately 30% with a gis installation when no gashandling is required. Innova 3731 sf6 leak detection system for enclosed gis. Chapter 7 400 kv substation free download pdf ebook. It draws air samples from up to 24 locations for maximum coverage of the gis substation. The installation period is shortened because it is easy enough to connect each modules for completion of installation. Man hours for installation and testing onsite will be reduced and more thorough testthe widely accepted iec 61850.
Gasinsulated substation article about gasinsulated. System design process gis wiki the gis encyclopedia. The metalenclosed gasinsulated switchgear is made as to ensure the best possible relationship between design, used materials, maintenance effort and maintenance intervals. In a typical nonideal situation, not all parts of a gis can be subjected to a high voltage test respectively gas compartments have to be opened again after the high voltage test. 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. Gis highvoltage gas insulated switchgear substations. Alternative installation methods for offshore wind substations. Ge continues to be a world leader in substation automation by continually introducing advanced products and systems, and providing experienced engineering teams for system design and installation. Following is single line diagram and operation of gis switchgear. Penn center west building one, suite 212 pittsburgh, pa 15276 tel. Electrical method statement is used for safe implementation and construction of electrical works.
Replacement of 50 years old substation increased availability of local network abbs response construction, installation and commissioning of new underground substation consisting of 72. Integrated gis technology up to 170 kv modular switchgear in. Where bus coupler sectionaliser is specified and in case of any internal arc fault in a busbar, busbar disconnector or sectionaliser, repair work must be. Gasinsulated switchgear type series 8dn8 digital asset. Ge provides a full range of gasinsulated substations gis for utilities and industries worldwide.
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. The integrated gis is a prefabricated gasinsulated switchgear. The compactness of gis enables an hv transformer substation. Gis installation based on abbs wellproven gis technology that can be produced and. Product brochure integrated gis technology up to 170 kv. By design, these highcurrent faults are forced into the earth at the substation. End of life estimation of hv switchgear and gis substations. An innercity site that has been used previously for an ais installation can be sold or rented out and the income used to help finance the new substation. Prashant future gis trends network and substation planning.
Lsis who has been a leader in electricity and automation in. If due to transportation damages, climatic conditions, incomplete civil works, etc. However, some special maintenance measures should be carried out to obtain a satisfactory reliability also in future. Southern california public power authority awards abb order for gis substation project. 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 number of transportshipping splits shall be minimized to keep installation time of gis to a minimum. The high voltage conductors, circuit breaker interrupters, switches, current transformers, and voltage transformers. There are many different electrical bus system schemes available but selection of a particular scheme depends upon the system voltage, position of substation in electrical power system, flexibility needed in system and cost to be expensed the main criterias to be considered during selection of one particular bus bar arrangement scheme. Our 8d series of gasinsulated switchgear represents a. Tubing lines can easily run into existing control cable trays, or trenches. All rus borrowers rus electric staff effective date. This bulletin is an update and revision of previous rea bulletin 651, design guide for rural substations revised june 1978. The gis userforum, focussing on the insulation performance, report that a service life of 50 years for gis of the first and second generation is achievable for gis with acceptable reliability.
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