Gis technology can be used for installations in areas where the cost of real estate is appreciable. As power generation sources become increasingly distributed, intermittent and volatile, achieving the levels of control and performance needed requires a more intelligent, efficient and reliable grid. Electric power may flow through several substations between generating plant and consumer, and may be changed in. This is now possible thanks to significant advances in grid automation technology in recent years, including the development of digital substations. 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. Gis substation constructions and covers equipment operated at lower voltages on the same. In 1965 abb delivered the worlds first substation with gasinsulated switchgear gis. An electrical substation is a subsidiary station that is part of an electrical generation, transmission, and distribution system. China is a huge country where electric power generation happens. 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.
May be preassembled within a prefabricated e house or mobile trailermounted substation. Gasinsulated switchgear up to 245 kv, 50 ka, 4000 a type 8dn9. Gis gas insulated substation why gis types of substation. Gasinsulated substation, gis, reliability, availability, maintainability, ram, extension, mre. A 50 hz electrical substation in melbourne, australia. Gis solutions for power generation and transmission services balancing the need to develop new markets, improve system reliability, and reduce operation costs is the greatest challenge for todays utility decision makersa challenge that is successfully met with esri s geographic information system gis software. Indoor substation gis gasinsulated substation gas sf 6.
Distribution of electrical power using gis international journal of. The portfolio includes gis solutions from 60 to 800 kv, along with secondary products to maximize switchgear and network operation. If the transformer contained within the substation is a stepdown, the. Electricity has to be transmitted over large distances as the place where the power. Gis highvoltage gas insulated switchgear substations. Substation definition n critical for generation, transmission, and distribution system n performs several important switching functions n may have various voltage levels before it reaches the customer n owned and operated by an electrical utility or a large industrialcommercial customer. In my last post about electrical substation, i discussed what is a substation, why we need substation and the most common components for an electrical substation. The high voltage conductors, circuit breaker interrupters, switches, current transformers, and voltage transformers are in sf6 gas inside grounded metal enclosures. The electrical substation design is a complex method with full of engineer planning. Gasinsulated substations gis energy and power for all. Think you know what a gas insulated substation gis.
The development focus for ais was on circuit breaker cb technology that would increase reliability and reduce maintenance. This equipment is a compact multicomponent assembly, enclosed in a ground metallic housing, which. In many ways, the grid is a onesizefitsall system a gigantic machine to which we all connect spinning in perfect synchrony across, in some cases, an entire continent. Gis is assembled of standard equipment modules circuit breaker, current transformers, voltage transformers, disconnect and ground switches, interconnecting bus, surge arresters, and connections to the rest of the electric power system to match the electrical oneline diagram of the substation. The substations are mainly used to convert ac alternating current to dc direct current. Economics between conventional and gas insulated substation. Gis technology originated in japan, where there was a substantial need to develop technology to make substations. The document describes instructions for general work in substations and is complementary to the power. A substation is an electrical system with highvoltage capacity and can be used to control the apparatus, generators, electrical circuits, etc. Pg scholar, department of electrical and instrumentation engineering. Electrical substation an assembly of equipment in an electric system through which electrical energy is passed for. A gis is the implementation, within a complete hv substation, of. By the same analogy we can explain what a substation does.
Contents introduction conventional substation ais limitation of ais need for gis introduction to gis gis unique features components of gis substation advantages of gis over conventional open air substation. Home technical articles main components of a gas insulated substation gis you should know about gis components gas insulated substations gis use circuit breakers, disconnect switches and grounding switches, and have various means of indicating their position, either opened or closed, so the same as. Fundamentals of modern electrical substations part 3. Etap gis provides owners, operators, and planners geospatial tools to better design, analyze, and expand their networks. Normally stations are where we catch trains or buses. 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 substation design manual is not intended to replace asset management standards, but rather. Our technical team has expertise in all aspects of substation design through 345kv for both open air substations and gas insulated substations. Electric power may flow through several substations.
Substation substation a station in the power transmission system at which electric power. We got the idea about the latest advancements going on in the field of gis and sub station automation. Introduction to gas insulated substations switchgears gis. 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. This is a 22066 kv large green field substation project based on hybrid gis technology with 3x100mva transformers.
Fuji electric as a manufacturer of comprehensive substation equipment is ready to supply advanced sf6 gas insulated switchgear gis superior in reliability. In this layer, substations are considered facilities and equipment that switch, transform, or regulate electric power at voltages equal to, or greater than, 69 kilovolts. Part 3 of the course fundamentals of modern electrical substations is concentrated on substation engineering aspects, which may be very challenging and require from utility companies engineers a very diverse knowledge and experience to address these aspects. 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. One purpose of a substation is to contain the equipment for changing electric energy from one voltage to another. Gis there are two terms presented in iec gas insulated switchgear and ieee gas insulated substations. At the end we hope that by this presentation your understanding regarding various types of substation, operation of a standard substation and also about the various equipements used in power substation would got more clear. Highvoltage substations, the node points of todays complex power transmission infrastructure, play a key role in meeting this demand safely and reliably. Pdf gasinsulated substation service continuity researchgate. 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. The author in his paper has made comparison of gas insulated substation.
This document supports the power system safety rules and its requirements assembled under work in substations general category 3. Containerized mobile substations are sheltered and address applications in challenging environmental conditions including areas with high pollution, high humidity, extreme temperatures or sand storms. With gis the footprint of substations can be reduced. Substation engineering ais and gis substations beta. Classification of electrical substation an electrical engineer. 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 solutions for power generation and transmission services balancing the need to develop new markets, improve system reliability, and reduce operation costs is the greatest challenge for todays utility decision makersa challenge that is successfully met with esri s geographic information. Pdf technology progress in highvoltage gasinsulated substations. Interconnection of power plants of the national or area electrical. A substations primary function is to transform voltage from low. Pdf ultra highvoltage gasinsulated switchgear a technology. Power transmission high voltage substations continuous. Map of electrical substation in shapefile format shp. Construction and service life of gis substation an. 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.
The footprint of 765kv conventional substation is enormous, and gis technology allows a significant size reduction. We have expertise in providing substation engineering packages for both utility and private customers including electrical protection and control, physical substation design, structural and civil. Substations containing stepup transformers increase voltage and decrease current. Substations also enable one or more of the following functions to be accomplished. Infrastructure facilities, industry, and private households around the world require more and more electrical energy highvoltage substations, the node points of todays complex power transmission infrastructure, play a key role in meeting this demand safely and reliably.
Gas insulated substation transformer electrical substation scribd. By this post, you will gain some very basic information for a substation. As a result, substation equipment had to be made more reliable and. The key steps in the substation designing include switchingsystem, planning and placing of equipment, selection of components as well as ordering, support of engineers, structural design, the design of electrical. Gis substation design and execution hv and ehv gis. Transmission, distribution, electrical power supply, gas insulated metalclad switchgear gis, air. Electrical substations are supplementary parts of electricity generation systems, where voltage is transformed from high to low and vice verse using transformers. Electrical substation an electrical substation is a subsidiary station of an electricity generation, transmission and distribution system where voltage is transformed from high to low or the reverse using transformers. Gas insulated substation free download as pdf file.
Earthing system is made of a mesh of buried bare copper cable, with additional earth rods, and shall be calculated, being recommended to use ieee std. This bulletin is an update and revision of previous rea bulletin 651, design guide for rural substations revised june 1978. Gas insulated substation gis vs conventional outdoor substation ais by engr. Contents introduction conventional substation ais limitation of ais need for gis introduction to gis gis unique features components of gis substation advantages of gis over conventional open air substation disadvantage of gis next presentation work. This substation is constructed using steel lattice structures to support strain bus wires and apparatus.
Gis for electric geographic information systems map etap. The manual is applicable for all substation projects regardless of internalexternal design delivery mode. 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. Operation and maintenance of a gas insulated substation. Substations are an important part of the electrical generation, transmission and distribution system. National grid substations technical specification ngts 2. How an electrical substation works brighthub engineering. Pdf presented paper refers to service continuity of gasinsulated substations, a topic which is also. The substation receives electrical energy directly from generating stations through incoming power supply lines while it delivers electricity to the consumers.
The electrical substation is the part of a power system in which the voltage is transformed from high to low or low to high for transmission, distribution, transformation and switching. This is showing three of the five 220 kv66 kv transformers, as well as highvoltage transformer fire barriers, each with a capacity of 150 mva. The substation receives electrical energy directly from generating stations through incoming power. Now i will discuss the classification of an electrical substation. The objective of ratings is to precisely use gis devices based on an electric system arrangement and features while decreasing the number of technical issues. Design guide for rural substations blank page united states department of agriculture rural utilities service rus bulletin 1724e300 subject. For example, in some design, a three phase circuit breaker, current transformer, earth switches, even other feeder elements are covered together in a single metal capsule. Gis solutions for power generation and transmission services. This feature classshapefile represents electric power substations primarily associated with electric power transmission. Gasinsulated substations gis have been used in power systems over the last three decades because of their high reliability, easy maintenance, small ground space requirement, etc. Design of earthing grounding system in a substation grid. Switching operations substations connect or disconnect elements of the power.
Gis technology originated in japan, where there was a substantial need to develop technology to make substations as compact as possible. For example, in some design, a three phase circuit. It can include transmission, subtransmission and distribution networks in the same electrical model and solve the combined networks. The siemens gasinsulated switchgear gis is an extremely successful product. Substations are the transfer points for energy flows within the electrical grid.
Substations also tend to double up as storage for equipment and other material that find use in the environment, leading to at least a couple of unwarranted risks. A onestop, complete reference text on gas insulated substations gis, largecapacity and longdistance electricity transmission, which are of increasing importance in the power industry today. Gas insulated substation definitions and basics cedengineering. Electrical substation components, workings and their functions. Main components of a gas insulated substation gis you. Gas insulated substations gis use circuit breakers, disconnect switches and grounding switches, and have various means of indicating their position. Restart your computer, and then open the file again. The portfolio includes gis solutions from 60 to 800 kv, along with secondary products to maximize. Abb is the pioneer in gis technology with over 45 years of proven technology for. Highvoltage substations highvoltage power transmission.
It is applicable to both openterminal airinsulated ais and metalenclosed gasinsulated gis substation constructions and covers equipment operated at lower voltages on the same substation site. The power transformer, circuit breaker, busbar, insulator, lightning arrester are the main components of an electrical substation. Several crucial terms are for better understanding of the presented material. Home technical articles main components of a gas insulated substation gis you should know about. They transform voltage from high to low, or vice versa, and provide the ties, transformation, switching and protection of the transmission and distribution systems. Classification of electrical substation an electrical.
A gasinsulated substation gis uses a superior dielectric gas, sf6, at moderate pressure for phasetophase and phasetoground insulation. To better understand the importance of electrical substations, lets start with a discussion about the structure of the power systems and their main components. In this gis or gas insulated switchgear system than one functional element are encapsulate in a single metal enclosure. 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 with conventional air insulated substation ais.
Robust electrical components are used to control and monitor the circuit. Design considerations of the substation and switchyard ii. Fundamentals of modern electrical substations part 1. Ehvehv and ehvhv 1 substations are an important element of the electricity transmission network of a country or of a large area of a country and their functions are.