They range from the very large to the very small see below for a guide. Components and substations for electrical transmission and. Ground potential rise in high voltage substations dwarka prasad 1, dr. They transform voltage from high to low, or vice versa, and provide the ties, transformation, switching and protection of the transmission and distribution systems. 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. The project will replace the current fused 21kv main campus substation line up with a new 21kv substation with 25kv breakers. High and medium voltage substation design, testing and. The primary substation serves as a load center and the customer substation interfaces to the low voltage lv network.
All rus borrowers rus electric staff effective date. Medium voltage switching equipment this technical article covers the medium voltage switching equipment intended mainly for primary substation installations. Solid state power substation vision, benefits, challenges. Installation of 11kv440v distribution substation ajinkya lonare1, pravin 2bodadkar, 4shuchiket darunde3, dr. Quality and reliability homac equipment is made in plants that are iso 90012008 certified for both design and manufacturing. Customer substation is referred to a distribution room normally provided by the customer. Substation engineering ais and gis substations beta. The high and medium voltage transformers in your substation require regular inspection, testing, and maintenance. Designed for both new installations and retrofit solutions, these substation transformers are optimized to perform in the most rigorous sectors of industry and are designed to last. High voltage substation environment ge grid solutions. Pdf substation design manual shally gupta academia. A high voltage substation is comprised of switching equipment, transformers, reactors, var compensators, protection, control, and automation and communication. Agrawal 1,2,3be student123, department of electrical engineering 4proffessor4, department of electrical engineering kdk college of engineering, nagpur, maharashtra, india abstract transmission.
Iec61850 adopted at station level iec61850 adopted at. With a wide and complete portfolio of high and medium voltage products, efacec is recognized for its expertise in terms of flexible and custommade solutions and products, and the ability to understand the customers needs and offer appropriate solutions for each project. Auxiliary dc control power system design for substations michael j. A novel method for optimal location and expansion of subtransmission substations considering existing medium voltage distribution feeders. For technical and economic reasons, the service voltage of medium voltage distribution networks rarely exceeds 36 kv. Technical information 4 solutions for power factor correction at medium voltage 20 circutor, s. Audit of lightning protection systems in medium and high voltage power substations article pdf available in przeglad elektrotechniczny 863 january 2010 with 325 reads how we measure reads. Cables in electrical energy systems the first modern according to todays views a 10 kv cable line was built in 1890. Stepup or primary substations such types of substations generate low voltage like 3. Electric current is generated with a voltage of 25,000 volts. Technical guide the mvlv transformer substations abb group. The input for a distribution substation is typically at least two transmission or subtransmission lines.
Distribution substation a distribution substation transfers power from the transmission system to the distribution system of an area. Substation transformer retrofit outdoor indoor eaton. Thompson, schweitzer engineering laboratories, inc. A substation is a part of an electrical generation, transmission, and distribution system. Medium voltage unitized substations elgin power solutions. High and medium voltage substation design, testing and maintenance training in london uk, dubai united arab emirates, kuala lumpur malaysia, istanbul turkey, france paris. Medium voltage products technical guide the mvlv transformer. Electrical energy systems components and substations for electrical transmission and distribution systems b. Some types of substations are tiny in size with an inbuilt transformer as well as related switches. A road map to the engineering design, preparation of bid documents, bid process and construction supervision kindle edition by linares m. Information shall be held in nonvolatile memory until reset. A substation is an electrical system with high voltage capacity and can be used to control the apparatus, generators, electrical circuits, etc. Medium voltage unit substations customizable unit substations with primary voltage classes up to 38kv and secondary voltage class starting 5kv and below.
Handson labs are a major part of this course to help the technician locate weak or faulty components in the substation systems. A detailed mounting and operation manual of the indoor air switchdisconnector nalnalfvr rated voltage 12, 17. Electrical substations can also be divided into public and. About the medium voltage circuit breaker maintenance training course no one likes a power system failure, especially when its caused by poor maintenance. Location of the surrounding loads in the layout of both the current and the. Site civil works are able to be executed at the same time as electrical install at elgins manufacturing plant. Medium voltage transformers eaton s mission is to improve the quality of life and the environment through the use of power management technologies and services. Solutions for power factor correction at medium voltage. The high voltage electric current usually leaves the grid substation on overhead lines.
Circuit breakers are a critical component in any power system and ensuring that they operate reliably helps you avoid unnecessary down time and expenses that result from unplanned outages. This system is supplied by breakers from the 4160v bus and the voltage is stepped down to 480v by the 4160v480v transformers shown on the drawing as sus transformer secondary unit substation. Across every market, abbs circuit breakers occupy a leading position thanks to their proven. Substations are where electricity lines are connected and switched and where the voltage is changed by transformers. Services, medium voltage substation replacement at the las positas college campus.
This document is a reference for the designers of ergon energy substations and it covers all aspects of substation design for both greenfield and brownfield substation projects to meet the performance expected by ergon energy. Typical schemes of digital substation typical schemes of digital substation complied with iec61850 the digital substation uses innovative ethernet technology to realize information sharing at process bus and station level. From a management perspective, considerations include the purchase price, the life expectancy of the switchgear, and the size of the equipment, the amount of time to install and commission the gear. It is a singlephase 58% step regulator utilizing the siemens type mj4. Fundamentals of electrical substations and switchgear. Safe work practices on high voltage substation apparatus. Primary distribution lines carry this medium voltage power to.
Many considerations must be taken into account before selecting the electrical medium voltage mv switchgear that best meets a users needs. A novel method for optimal location and expansion of subtransmission substations considering existing mediumvoltage distribution feeders. Medium voltage miniature substations for systems with. Certificate of completion for medium voltage mv substation buildings. 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. This bulletin is an update and revision of previous rea bulletin 651, design guide for rural substations revised june 1978.
Substations are an important part of the electrical generation, transmission and distribution system. Limiting shortcircuit currents in mediumvoltage applications. Medium voltage substations are of high importance for the electricity distribution networks as they are the points where the medium voltage of the network is converted from 20,15kv or 6,6kv to low voltage 400230v for industrial or domestic use. Pdf highvoltagemediumlowvoltage substation earthing systems. C sharma 2 1research scholar, uttarakhand technical university, dehardun uttarakhand,india. Pdf the paper presents the results of the analysis of the main hvmvlv substation earthing system parameters. As the distribution system is rated up to 50kv many large industrial. These large substations are also known as grid substations. Utilize schneider electrics wide range of choices on all parts of each substation application. Future distribution substation with integrated iot connection. G19, design build services, medium voltage substation replacement, las positas college page 2 project scope. A0202 basics in electricity and high voltage products. Mediumvoltage circuit breaker maintenance training course. Features broad line of solutions with weldment and bolted products up to 500kv, homacs wide product offering includes a full line of couplers, taps, bus supports, terminals and expansion connectors.
Course focus is on medium voltage circuit breakers air. A large substation like this one will increase the voltage to 2,000 or 400,000 volts ready for transmission across long distances. 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. Topics include medium voltage networks, power transformers, switchgear, mvlv substations, service conditions, shortcircuit, voltage drop, dielectric withstand, accessibility, service continuity, parallel operation, natural cooling and corrosion, general information on protection, control and monitoring, smart grid and eco design. Southwires medium voltage switchgear and substation cable is a nonshielded, insulated, finely stranded cable that has no voltage rating. Medium voltage transformer substation testing solfas. An extensive range of features and accessories are available, including deenergized tap changers, onload tap changers, forcedair cooling systems, fluid preservations systems. Studies showed that the voltage drop, total impedance, percentage efficiency and percentage regulation on the feeder are 944 v, 4. The difference in surface potential experienced by a person bridging a distance of one meter with the feet without contacting any other grounded object. Illustrated with around 80 high quality photos and drawings. Tikhodeev encyclopedia of life support systems eolss 2.
A mv lv transformer electrical substation consists, therefore, of the set of devices dedicated to the transformation of the voltage supplied by the distribution network at medium voltage e. The connection of an electrical installation to a mv utility distribution network. Electrical switchgear safety a guide for owners and users this is a webfriendly version of leaflet indg372rev1, published 04 introduction this guidance is for owners and operators of electrical switchgear in industrial and commercial organisations with little electrical knowledge or expertise available inhouse. In the unit substations, the voltage is then typically stepped down to the utilization voltage such as 6.
Although southwires medium voltage switchgear and substation cable has no industry approv als, the cable does meet the requirements for insulation used on conductors whether rigid or flexible contained in clause 6. Along with the role of each type of equipment, one should understand how the equipment is utilized to provide reliable power to the station. Electric power distribution is the final stage in the delivery of electric power. Distribution substations connect to the transmission system and lower the transmission voltage to medium voltage ranging between 2 kv and 35 kv with the use of transformers. Circuit breakers medium voltage circuit breakers for indoor and outdoor applications with the worlds most successfull range in medium voltage vacuum and sf6 gas. Technical engineering, procurement, and construction. Auxiliary dc control power system design for substations. Abstractthe most critical component of a protection, control, and monitoring system is the auxiliary dc control power system. The difference in potential between a grounded structure or station and the surface potential at the point where a person is standing while at the same. A consumer power substation with metering on medium voltage side is an electrical installation connected to a utility supply system at a nominal voltage usually between 1kv 35kv, which for example may supply a single mvlv transformer exceeding generally 1250 kva, several mvlv transformers or one or several mvlv secondary substations. Distribution voltages are typically medium voltage, between 2.
The term medium voltage is commonly used for distribution systems with voltages above 1 kv and generally applied up to and including 52 kv1. The existing feeder and circuit cables will not be replaced as the new substation will be located at the same location as the current substation. Medium voltage technical guide 2018 schneider electric. Pdf an investigation into the causes and effects of voltage. Medium voltage substation 16310 d2 5182000 system shall be capable of measuring and display on demand, phaseline current, phaseline voltage, kw, kva, kvar, and power factor. The type jfr has been an industry leader since 1933. We provide sustainable solutions that help our customers effectively manage electrical, hydraulic and mechanical power more safely, more efficiently and more reliably.
Elgin has delivered over 100 unitized substation applications. The higher the voltage, the less energy is lost due to resistance source. The specific requirements of the substation project description, physical arrangement, voltage classes, current ratings, protective relaying schemes, metering requirements, etc. Eaton s cooper power series substation transformers are built with unprecedented quality and attention to detail, meeting a vast range of customer specifications and applications. The consumer power substation with metering on medium voltage. Digital substation introduction stefan meier, abb substation automation systems, 20141104.
The target is to give some basic knowledge and difference between 4 main piece of mv switching equipment, especially in the view of distribution automation concept. Equipment list included low and medium voltage switchgear, 80mw generator, 69kv sf6 breaker and 50 mva transformer onsite regasket of 69kv, 50 mva transformer, reprocessed oil, performed degasification and replaced prd high voltage substation project profiles continued. Substations transform voltage from high to low, or the reverse, or perform any of several other important functions. Medium voltage service medium voltage service maintenance. Presentation on industrial training in 220kv substation ig nagar, jaipur on the topic operation and maintenance of ehv equipment and trannsmission system. Introduction modern power plants have an extensive electrical distribution system to provide. The cables primary use is for installation in medium voltage switchgear, motor controllers, and substations. The remainder of the oneline diagram reflects the low voltage system which is operated at 480v.
Classic types an electrical transformer substation consists of a whole set of devices conductors, measuring and control ap. Simplified substation wiring saves time and money fast and reliable communication for time critical applications supervised ethernetbased communication future proof. Currently, digital substations can be classified into 3 modes. This voltage is stepped up by the help of a stepup transformer for transmitting the power over large distances. Typical voltages for long distance transmission are in the range of 155,000 to 765,000 volts.
The substations are mainly used to convert ac alternating current to dc direct current. Pdf audit of lightning protection systems in medium and. Pdf a novel method for optimal location and expansion of. Unitized substations are an effective way to simplify a substation project by reducing site labor, reducing complexity of electrical installation and reduce risk of injury. The manual is applicable for all substation projects regardless of internalexternal design delivery mode. All of the pertinent accessories of the transformer, including the load tap changers ltc, lighting arrestors, pressure relays, and bushings will be cleaned and tested for the most optimal and comprehensive test results. Primary grid substations this substation lowered the value of primary. Jul 28, 20 standard voltage type voltage extra low voltage up to 50v acdc low voltage 50v acdc medium voltage above v acdc upto 6. This substation uses large transformers to convert or step up the generators voltage to extremely high voltages for longdistance transmission on the transmission grid. This course provides an overview for apprentices, technicians and engineers responsible for the maintenance and testing of industrial and utility substations.
Pdf voltage and current balancing in low and medium. The cable has no ul listing and is not recognized by the national electrical code nec. Between the generating station and consumer, electric power may flow through several substations at different voltage levels. This form must be sent to esb networks when a substation is complete and ready for installation of medium voltage switchgear. For technical and economic reasons, the service voltage of medium voltage distribution networks. There are basically two major types of distribution substations. The power transformer, circuit breaker, busbar, insulator, lightning arrester are the main components of an electrical substation. Lv transformer electrical substation consists, therefore, of the set of devices dedicated to the transformation of the voltage supplied by the distribution network at medium voltage e. Medium voltage unit substations documents and downloads. Failure of the dc control power can render fault detection. This solution was specially designed for heat run tests at transformers, transformer substations and low voltage switchboards according to the standards iec.
356 1272 79 628 1493 1623 949 1032 489 472 1192 1397 245 374 191 370 1259 459 566 840 1299 1626 983 215 1131 1370 666 515 701 1164 1121 877 906 466 387 410