The wind speed is not more than 35m/s; 5. Earthquake level acceleration ≤0.4m/s2, vertical acceleration ≤0.2m/s2. Advantages of Outdoor Substation (AIS): 43. Altitude: Less than 1,000 feet. Industrial complexes, for example, often house numerous internal stations and should be treated the same as any outdoor air-insulated substation. The advantage of Outdoor Substation: Outdoor Electrical Substation is located in Outdoor that’s means there will be no rooftop. The thickly populated areas, the space available for building and equipment and the cost of land is very high. 2.2 GIS Substation Description A Gas Insulated Switchgear substation (GIS substation) uses Sulfur hexafluoride gas (SF6 Gas) whose dielectric strength is higher than air, to provide the phase to ground insulation for the switchgear of an electrical substation. In outdoor and hybrid substations, the occupied area is tremendously reduced by using GIS technology! Substations may also be owned by manufacturing, industrial, or large commercial customers; instead of being owned by the power utility, if the distribution substation is a direct supply from the transmission entity to the customer.Substations can also operate at many different voltage levels. In which of the following substation … However the cost of GIS indoor substation is higher compared to AIS substation but it has some benefits which includes high reliability, less space requirement and less maintenance. 02. Why? Substations Customer’s need Rio Light had two old AIS Substations operating in very expensive locations (m² prices!). Cost: this includes the overall cost of running the substation. 09: Fault Condition: Very easy to clear the fault. The transformers are of the sealed tank design and suitable for use in coordinated unit substation in most any type of application and environment. b) Outdoor compact substation: concrete prefabricated substation with outdoor operation in order to reduce dimensions. A typical electrical substation has transformers and various protection hardware (circuit breakers, fuses, and sometimes power factor correction hardware). READ PAPER. AIS are usually installed outdoor. Package unit substation normally designed in compact size applied in indoor and outdoor secondary distribution system. Equipment are installed within the building of substation to avoid the exposure of transmission line with hazardous chemicals. IEEE Guide for Substation Fire Protection IEEE Power and Energy Society. This is a comprehensive tool to determine the cost of building a substation or any small portion of it. In general, both circumstances lead to a considerable cost saving with complete substation projects when SF Installation Costs - GIS is less expensive to install than … The electricity substation is a network of electrical equipment which is connected in a structured way in order to supply electricity to end consumers. This fact allows GIS to become the choice of preference for indoor and underground substation. Fault location in indoor type substation is____ A. easy B. difficult C. depend on type of fault D. none of the above. Type of substation: this consideration could either be an indoor or outdoor substation. Disconnect Switch / Isolator. One substation, in particular, faces a threat of demolition by neglect. Ans : The following factors are to be considered in selection the site of an outdoor type substation :- a) The site should be located closed to the centre of its supply area. The construction is more expensive. 4. Customers requiring shorter overall delivery times and minimal on-site work have been the main drivers for RWW development of containerised outdoor substations. The original estimated budget was $5.8 million with the final cost being $6.7 million. In spite of the disadvantage, outdoor substations are very widely used in the power system. The design of the IP class of The outdoor enclosure of compact substation can be standard IP 23 up to IP43 , which is accordance with IEC 60529 Standards. The kit type substation is delivered in sub-assemblies, which are to … 1 Per Unit(reference value) 0.61 Per Unit. Difficult fault location because of equipment not being in full view. This is significantly higher for the GIS than for the AIS solution. IEEE Guide for Substation Fire Protection IEEE Power and Energy Society. Some of the advantages and disadvantages of outdoor switchyard is discussed below. 2. Your Comments. Outdoor Substation . Disconnectors (Isolators) are devices that are generally operated off … The length of the control cables increases which increase the cost of the substation. Advantages of Outdoor Substation (AIS): Tracking the pros & cons of air and gas substations. Cost: The cost of the indoor substation is low. Mehta Each piece of equipment is given more than one (1) type. The most common voltage levels are: 765kV, 500kV, 345kV, 230kV, 161kV, … The higher the voltage rating, the greater the saving, as 38kV Reclosers are significantly cheaper than corresponding Substation Circuit Breaker equivalents. For indoor and outdoor distribution, 4.8 kV through 34.5 kV ... Cypoxy Station Post Insulators deliver real value in substation fuse, switch, and bus applications. Regarding construction work for indoor substation it is a bit complicated. II.1.3. As the name implies, these substations have equipment located out. All material cost is populated. Indoor Air-Insulated Substations. In my (limited) experience, most substations use the air as the main insulating medium between power lines. Some of the advantages and disadvantages of outdoor switchyard is discussed below. Outdoor Indoor More space required Less space required Less time required for erection More time required for erection Easy future extension Difficult future extension Easier fault location because of equipment being in full view. Urban and suburban indoor substations may be finished on the outside so as to blend in with other buildings in the area. Atmospheric: [Indoor] [Outdoor, Exposure to rain and dust]. Simultaneously, Bangladesh Automation Technologies’ Sisters Concern Substation Training Course in Dhaka has been conducting substation training with excellent reputation and success. In these cases constructing one permanent outdoor or indoor substation for fulfillment of power supply is not economical. The following advantage can be found by an outdoor substation. II.1.4. The disadvantage of GIS gas insulated substation: 1. Cost Breakdown: Civil. b.) The substation can be supplied without an enclosure for indoor use, or with an enclosure for outdoor use. A. Exciters . c) Underground compact substation : concrete Pole mounted sub stations are used for..... distribution A. transmission and distribution outdoor and indoor substations and switching stations. The cost of the outdoor substation is high. Due to the very high cost of land, it is extremely difficult to acquire a large piece of land for constructing the conventional air-insulated outdoor substation (AIS) in an urban area. Capital cost of outdoor substation is ____ than indoor substation of the same rating. distribution substations in MEA: air insulated outdoor substations (AIS) and gas-insulated substations (GIS) in MEA. 3.1 Air circulation. A short summary of this paper. 44. A. low B. high C. same as D. none of the above. ground in the substations and mostly are being used in power sector. outdoor locations. They offer up to 25% greater dry-arcing distance than comparable porcelain insulators, resulting in fewer costly outages from animal intrusion. Nowadays the Gas insulated substations (GIS) are gaining popularity due scarcity of sufficient size of land to construct an Air insulated outdoor substation. Whereas for outdoor substations, the installation cost is too high. Electrical substations form important nodal points in all power networks. The land area should be considered because this will affect the layout of the substation. 3) Is it necessary to design a ground grid by taking the grid current as 20 kA for LV substations even though it is an indoor substation? Thus, indoor primary substations have a higher cost and not as common as outdoor substations.A primary substation, in which equipment is installed on the open air, is called outdoor. This arrangement is preferable for town or urban substations because of the convenience of using standard indoor switchgear rather than the more expensive weatherproof designs. Primary B. More because additional building construction is required. The transformer and other power apparatus should be grounded and the step and touch potentials must be less than the allowable safe values as require for the standards (Consult the IEEE Std 80) A substation in which the apparatus is equipped inside the substation building is called indoor substation. The greater cost of indoor sub-station prohibits its use. 1 Per Unit(reference value) 0.82 Per Unit. However, from Fig. A. There is numerous electrical substation components like outgoing and incoming circuitry each of which having its circuit breakers, isolators, transformers, and busbar system etc for the smooth functioning of the system. Advantages : i) Easy operation: Outdoor substation is easy to operate as compared to an indoor substation. (Modern substations are often a "unit" design which is even more compact.) Unit substations are designed to convert distribution voltages to utilization voltages and can be used outdoor or indoor for commercial and industrial application. The expensive equipment (Switchgear equipment, Power transformer, & another protective device) are used there. Extra High Voltage (EHV) Air insulated outdoor switch yard substation design and drawings is our main product for more than last fifteen (15) years. The cost of maintenance, repair and replacement at remote substations is both costly and inconvenient and can surpass any savings that were had on less expensive electronic equipment. 1 Per … Due to the large power demand brought about by a growing population and a robust industrial sector, there is a need for the power supply company to embrace efficient methods. Indoor and outdoor substations - Overview Types of substations Elements of substations Classifying criterion of substations Medium voltage switchgear assemblies & CBs Outdoor circuit breakers Outdoor disconnect switches Indoor & outdoor instrument transformers Protection, PLCs & SCADA Lightning arresters Cables, cable/bus … There are five major considerations in the differences between the two high voltage substations: their construction, installation, operation, ongoing maintenance and total cost of ownership. Other factors may include land acquisition cost, initial project investment costs, initial size of service and infrastructure required, indoor versus outdoor, and so on. 5 An Overview of Gas-Insulated Substations . 01. The differences between air insulated substation engineering and gas insulated substation engineering are vast. Indoor with CBs: Outdoor with Reclosers: 13.2kV Substation equipment. The bloc type substation is fully assembled and tested in the factory. Outdoor substation requires less maintenance. Description: [Indoor] [Outdoor], articulated secondary unit substation manufactured to NEMA 210, as shown on the drawings nos. Demand for substation training courses is at an all-time high, with public-private cloud projects, more than 100 economic zones, and new power plants. In which of the following substation … line are not insulated hence clearance between them is more. The cost will be higher than the normal substations. b) Sufficient land is to be available at a reasonable cost and without much difficulty for the construction of substation and the accommodation of the operating staff. 2. Economic consideration. Secondary C. Both A and B ... For cost and safety the outdoor substations are installed for voltages above A. Power Supply 33/11kv Power Electrical Distribution Substation, Yb-12/0.4 Outdoor Preinstalled Substation FOB Price: US $10-2,000 / Piece Min. - Rockwill's pre-fabricated substation i.e Compact substation is comprising of main: >>> Outdoor enclosure. Container type unitized CSS compact substation is a complete type tested per latest IEC standard 62271-202 which is comprising a outdoor enclosure containing medium voltage (MV) switchgear, power or distribution transformers, low voltage (LV) switchboards, busbar or cable connections and auxiliary equipment to feeder elctric power by a step … Indoor Substation type is only employed in places where high pollution or the saline environment exists. Indoor substations are two types Substation with conventional switchgear equipment enclosed in a big building. Figure 2 – Layout of double busbar GIS. Enter the quantity for an estimate. 36. that the cost of high voltage installations employing metal-enclosed SF 6 technology is lower than for conventional outdoor switchgear for rated voltages of 420 kV and above. Distribution voltages are typically medium voltage, between 2.4 and 33 kV depending on the size of the area served and the practices of the local utility. 11 KV B. Indoor Substation: For voltage up to 11 kV the equipment of the substation is installed in the indoor for. One of the key areas is substation insulation.There are two primary substation insulation systems in the world, Gas insulated, and Air insulated substations. Outdoor vs. Indoor Substations Abstract: The development of the outdoor substation vs. the indoor type is an interesting commentary on the adaptability of engineering progress to new fields and the subject is briefly recapitulated in this paper, in line with the developments and application of this branch of transmission work. Capital cost of outdoor substation is ____ than indoor substation of the same rating. Substations can be of various capacities, voltages, configurations and types depending on what is the application for which the substation is being designed. With the rapid growth of power grid scale, inspection robot has entered the stage of scale promotion and application in substation, for the outdoor inspection of substation, the functions of routine inspection, meter transcription, automatic storage and comparison analysis, infrared precise temperature measurement, background automatic archiving and analysis are realized. More insulation level. 11: Repairing & Replacement : The equipment of the indoor substation cannot easily … 10: Maintenance: Indoor substation requires high maintenance. 42. Evidently, the cost of deploying reclosers in an outdoor environment vs indoor with CBs on a capital expenditure basis saves substantial investment. Such substations are usually for a voltage up to 11,000 V but can be erected for 33,000 V and 66,000 volts when the surrounding atmosphere is contaminated with […] Joint Pair Substation At this substation, only the transformer is placed outside, while other equipment is inside the building. The Washington Park Substation at 6141 S. Prairie Avenue is an outstanding example of the many substations constructed across Chicago. Cost Breakdown: Electromechanical. The design of grounding system for GIS indoor substations and AIS is Gas Insulated Substations are used where there is space for providing the substation is expensive in large cities and towns. The overall height and width of the total substation unit should be such that it would meet the State and Federal road regulations. The project did take longer than initially planned primarily due to changes in Transpower’s requirements and an incident at a substation (unrelated to this project) that put the mobile sub project on hold. The design of grounding system for GIS indoor substation is different from conventional AIS. When planning a substation one should consider whether it is necessary to build by the substation, how the system is being operated, what redundancy is required, etc. This paper. public safety) exert considerable influence in choosing indoor sub-station. Utility grade equipment that is tested to IEEE 1613 and IEC 61850-3 uses higher quality components and more expensive design that is required to meet the standards. The technical requirements and the business case for this type of facility depend highly on the customer’s requirements, more so than on utility needs. - It's total a cost saving solution for fast project demand. In this post, I will discuss the advantage and disadvantages of outdoor electrical substation compared with the indoor substation. The mobile substation or portable substation is fully equipped with different power system equipments, and must be able to be shipped from one place to another with fully assembled mode. The site required is much smaller. The input for a distribution substation is typically at least two transmission or subtransmission lines. 26. In general, both circumstances lead to a considerable cost saving with complete substation projects when SF View substation.ppt from EEE 1EEE at Sree Vidyanikethan Engineering College. Underground substation. Compact Substations, Indoor Substation, Outdoor Substation, Control Panels, HT Panels, Cable Glands, Manufacturer, Supplier, Exporter, Nashik, Maharashtra, India Also a mobile substation is required where there is lack of space for constructing out door substation during any big construction work when consumption of huge power by construction machines is required. 44. substations: a)Indoor compact substation : equipment with three compartments (MV switchgear, transformer and LV distribution board) on a moving (with wheels) metallic chassis. In normal substation the clearances between the phase to phase and phase to ground is very large. Distribution voltages are typically medium voltage, between 2.4 and 33 kV depending on the size of the area served and the practices of the local utility. More as some components such as bus bar, O.H. Indoor & outdoor substations, an overview 1. Indoor Substation. 33 KV C. 66 KV D. … Step-down Type Substation: these kinds of substations are located at different points in a network, and they can connect the … 220 kV three-phase power transmission than three wire come across with transmission tower, and most of the primary gird substations were the outdoor types. However the cost of GIS indoor substation is higher compared to AIS substation but it has some benefits which include high reliability, less space requirement and less maintenance. Indoor substations With the growth of cities, new substations are increasingly being built in urban areas, which means size, silence and aesthetic appearance are becoming key considerations for these installations. The Lansing Board of Water & Light’s new Central Substation in the city’s historic REO Town neighborhood features a two-sided, 425-square-foot living wall installed with the LiveWall ® Outdoor Living Wall System.Completed in July 2019, the living wall greens up the exterior of the new substation and establishes a visual link to the Scott Sunken Garden.
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