Overhead busbar design for 22066 kv gis substation prakruti shah1 and hetal desai2 1,2assistant professor, electrical engg department, navrachana university abstract the paper is assigned to design a 22066 kv hv gis substation. The advantages of duplicate busbar arrangement over signal busbar arrangement are as follows. The choice of a particular arrangement depends upon various factors such as system voltage, position of substation, degree of reliability, cost etc. Basic elements of substation equipment 1 busbars conductors carrying power to individual branches 2 branches equipment for carrying power to grid lines instrument equipment in branches switch circuit breaker cb busbar disconnector outlet disconnector voltage and current transformers vt, ct. Edms, printed to an electronic drawing set adobe pdf and issued to the project. Steel structures, equipment anchorage and foundations accepted by.
Nov 15, 20 this shows information regarding substation layout, busbar arrangement, scada, plcc. Fault of bus or any circuit breaker results in shutdown of entire. Jun 03, 1975 however, whereas lines 109 and 111 were forced to cross over the exterior buses, lines 209 and 211 are free to be run directly outwardly as are the other lines 207 and 208. Bus bar arrangement of substation electrical substation. Hence, total current entering into a bus section is equal to total current leaving the bus section. Supply in the package materials have been classified as under i. Our products are widely used by utility companies, substation packagers, and electrical contractors. Abstractdistribution substations at electric cooperatives and municipal utilities have historically involved simple protection. In this way, the main buses will not block the removal of equipment located in the substation interior.
They are generally uninsulated, and have sufficient stiffness to be. Structure detail drawings are used for fabrication and assembly. Removable bus sections can also be provided to permit movement of large equipment. Interview question of bus bar system of substation. Terrorism and the electric power delivery system focuses on measures that could make the power delivery system less vulnerable to attacks, restore power faster after an attack, and make critical services less vulnerable while the delivery of conventional electric power has been disrupted. Complete security of supply may be achieved by duplicating all circuits and substation equipment. Pdf model study of lightning protection of 110 kv substation. It considered incoming power at 220 kv and the power was transferred to main bus through isolator circuit. Jul 25, 2018 electrical bus system and electrical substation layout july 25, 2018 february 24, 2012 by electrical4u 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 following current and former members of the substation subcommittee of the nreca. Psychiatric associations diagnostic and statistical manual, iii1 as follows. The dependency of secure power is increasing in the society which leads to higher demands on the availability of electric power.
Protection requirements basic protection of a busbar is not much different from other components, but the key role of a busbar makes two of the requirements the more important. The busbars used in a substation are either rigid type or flexible type. Later, this substation can be upgraded to double busbar arrangement and bus coupling. When further extensions are not planned, the compact version without busbar is selected. In other words, it is a type of electrical junction in which all the incoming and outgoing electrical current meets. They are also used to connect high voltage equipment at electrical switchyards, and low voltage equipment in battery banks. Please also see enclosed room type substation layout as per nbc. 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. An electrical bus bar is defined as a conductor or a group of conductor used for collecting electric power from the incoming feeders and distributes them to the outgoing feeders. The following are the important busbar arrangements used in substations single bus bar.
Busbar arrangement nothing but a combination of bus and circuit breaker. Single busbar arrangement with bus sectionalized in this type of busbar arrangement, the circuit breaker and isolating switches are used. Main buses are located in the middle of the substation with all disconnecting switches. The studs of reinforcing rods provided as connection points must be left free from the pouring of the floor. Structures are usually identified on other drawings such as slide 33. Guidelines for substation and power distribution systems. Scholar, electrical and electronics engineering department, aisect university bhopal, mp, india. Double bus bar single breaker scheme d double bus bar double breaker scheme this scheme is seldom used expect in very large generating stations security and continuity of supply is of paramount importance. Busbar, bus layout, switching arrangement, types of busbar, substation layout i. The present electrical power system is a complex interconnection of generating. With this arrangement all outgoing circuit takeoff towers are located in the outer perimeter of the substation, eliminating the crossover of line or existing facilities. Introduction to substations annotated instructors guide module overview this module introduces trainees to the function of substations at all levels of the power grid, with an introduction to typical substation components included. Read terrorism and the electric power delivery system at.
Buspar buspirone may treat, side effects, dosage, drug interactions, warnings, patient. Transformer oil has to be kept free from contact with outside contaminants always present. Associations diagnostic and statistical manual, iii. Substation layout single line diagram substation switchyard accessories lightning arrestor cvt earthing switch wave trap isolator current transformer circuit breaker power transformer current. Bus protection considerations for various bus types. Transformer oil has to be kept free from contact with outside contaminants always. With an overhead line fed transformerfeeder substation a line disconnectorearth switch is desirable since the probability of a fault insulator failure, development of hot spots on connections, etc.
Introduction to substation design tadp 542 substation structures design loads instructor. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Nov 08, 2011 busbars are the important components in a substation. 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. 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. The principle of differential busbar protection is very simple. 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. Singlebus arrangement the singlebus arrangement is the simplest and most economical arrangement available, with one breaker per terminal 1. Aug 31, 2018 the scheme of busbar protection, involves, kirchoffs current law, which states that, total current entering an electrical node is exactly equal to total current leaving the node. Substation structures design loads references substation structure design guide 2008, asce manuals and reports on engineering practice no.
Bus bar arrangements in sub station iiteeeestudents. Electrical bus system and electrical substation layout. Fundamentals of electrical substations and switchgear. The scheme of busbar protection, involves, kirchoffs current law, which states that, total current entering an electrical node is exactly equal to total current leaving the node. There are several busbar arrangements that can be used in a substation. Typical circuit breakerrecloser bypass arrangement. Substation arrangement designs electrical substation. While in the normal course a bus frame is rigid, being made of aluminum conductor or the like, the arrangement of fig.
The availability willis 2000 can be defined as the fraction of time that the electric power is available in a certain point in the network during a. In electric power distribution, a busbar also bus bar is a metallic strip or bar, typically housed inside switchgear, panel boards, and busway enclosures for local high current power distribution. 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. Installation of 11kv440v distribution substation ajinkya lonare1, pravin 2bodadkar, 4shuchiket darunde3, dr. Iec 60050 international electrotechnical vocabulary. Electrical busbar is the collector of electrical energy at one location operating at a constant voltage. However, whereas lines 109 and 111 were forced to cross over the exterior buses, lines 209 and 211 are free to be run directly outwardly as are the other lines 207 and 208.
Iec international electrotechnical vocabulary iev international. Basic substation configurations and the components avo training. Buspirone, sold under the brand name buspar among others, is a medication primarily used to. For a detailed outline of maintaining substations and related switchgear assemblies, follow nfpa standard 70b, recommended practice for electrical equipment maintenance, chapter 8. All works must be designed for maintenance free lives as detailed in the below table.
The invertedbus or folded breakerandahalf arrangement is a low profile option. Electropedia, the free dictionary of electrical and electronic terminology and equivalent terms in 14 languages from the iec. Isometric projection for double busbar arrangement. Buspirone is in a class of medications called antianxiety medications. The term busbar is derived from the latin word omnibus, which translates into english as for all, indicating that a busbar carries all of the currents in a particular system. The fence is connected to a separate grounding conductor. Introduction the purpose of this paper is to provide a general guide to the design and selection of proper bus bar scheme as per the design of typical substation. The arrangement provides the less flexibility and hence used in the small substation where continuity of supply is not essential. Several sizes of aluminum and copper bus pipe, flat bar, and aluminum angle are always in stock.
Design guide for rural substations usda rural development. Substation layout free download as powerpoint presentation. Rigid busbars are made up of aluminum alloy tubes of 50 to 250 mm diameter and supported on post insulators with clamps and connected at both ends by strain insulators with clamps and connectors. The material composition and crosssectional size of the busbar determine the maximum amount of current. Substation layout single line diagram substation switchyard accessories lightning arrestor cvt earthing switch wave trap isolator current transformer circuit breaker power transformer current transformer reactors and. Sme advice to general arrangement, concept sketches where. Busbar protection busbar differential protection scheme. Structure drawings for first substation are listed on slide 4. This led to the development of two types of solutions with disconnect switches dss integrated with the cb function. Jul 28, 20 substation is a interface for receiving power and to distribute power slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising.
Busbars are the important components in a substation. The difference between the ground potential rise and the surface potential at the point where the person is standing while at the same time having a hand in contact with a grounded structure. Security of supply security of supply or substation service continuity is the main factor in selecting the switching scheme. The arrangement does not permit breaker maintenance without causing stoppage of supply. Several sizes of aluminum and copper bus pipe, flat. Agrawal 1,2,3be student123, department of electrical engineering 4proffessor4, department of electrical engineering kdk college of engineering, nagpur, maharashtra, india abstract transmission. If you continue browsing the site, you agree to the use of cookies on this website. Technical specification construction of 3311 kv primary sub. We have been supplying aluminum and copper bus for more than 30 years. Often the most desirable arrangement has the main buses at higher elevations than the buses and equipment in the substation bays. Technical specification construction of 3311 kv primary substations. An ebook reader can be a software application for use on a computer such as microsofts free reader application, or a booksized computer that is used solely as a reading device such as nuvomedias rocket ebook. The disconnecting function was still required but more for maintenance of overhead lines and power transformers.
Abstract the thesis deals with the analysis of construction of power lines and substation switchyard of 3311 kv. Note that the bus in each of these configurations serves to connect the transmission lines together from a node in the system. Owners supply materials osm 3311 kv power transformers, station 330. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Technical guide the mvlv transformer substations abb group.
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