Direct current traction power shall be provided by the traction power substations with rated voltage output of 750 volts dc at 100 percent full load. Charles joseph director, rail programs apta washington, dc the panel convened in washington, dc. The main issues facing a power engineer are reliability and cost. The method of connection of the battery, battery charger, and dc distribution systems depends on the duty, the type or load, and whether the system needs to be duplicated or whether duplicate chargers are required. Replace previous bulletin 651 with this bulletin and file with 7 cfr part 1724. Transmission, sub transmission and distribution substation 4. A good design attempts to strike a balance between these two, to achieve reliability without excessive cost. Highvoltage substations, the node points of todays complex power transmission infrastructure, play a key role in meeting this demand safely and reliably. In this example, an alternative connection is shown for the batterytocharger connection, and that alternative is preferred when sensitive digital systems are being fed or when there is a longer distance between the distribution panel and the batteries and charger. Operational and safety considerations for light rail dc. With 30 years of dc traction power substation rehabilitation, replacement, and new installation, theres no design challenge we havent faced. High voltage substation design and application guide eep. The charger also feeds the dc loads from ac system via a rectifier.
Earth resistance may 15, 2015 the specific purposes of this guide are to. Power plant electrical distribution systems gary w castleberry, pe 2008 pdh center 2410 dakota lakes drive herndon, va 201712995 phone. Dc conversion equipment, traction power transformers and rectifiers and dc distribution equipment dc substation feeder breakers, feeder cables, track switches and tunnel breakers, this equipment is designed in accordance with contract requirements. Substation platform with transformer and electrical equipment converter platform if high voltage hv dc transmission is used transmission to shore hvac or hvdc submarine cable cable landing hvac or hvdc land cable onshore converter station for hvdc onshore substation interconnection. Positive dc current from each transformerrectifier element will be fed to the dc switchgear in the substation through dc busways. The intent of this guide is to provide guidance and information pertinent to safe grounding practices in ac substation design. Generally, they serve to connect different voltage levels and current types i. Ppsitive current from the dc switchgear at each substation will be fed by the wayside distribution. The criteria for establishing the design of the substations including transformers, rectifiers, ac and dc switchgear and controls, etc. The rectifier output voltage based on inherent regulation at various loading shall be as follows. Thompson, schweitzer engineering laboratories, inc. Exelon corporations dcinabox substation, a gridapp. Substation design the purpose of this document is to provide a general guide to the design of an air insulated switchgear ais and a gas insulated switchgear gis of an ac substation.
Platformless dc collection and transmission for offshore wind. The design should also allow expansion of the station, when required. Design the main considerations taking into account during the design process are. I subscribed this morning to your website and immediately thereafter there came up a link to download the pdf ebook power substation design calculations a checklist of 18 studies for engineers to consider erroneously i closed the window and then i cant find that link anymore, not it is in my mailbox. Bus arrangements reliability cost of configuration available space. Most of these systems are fed by direct current dc.
Ac power is required for substation building small power, lighting, heating and ventilation, some communications equipment, switchgear operating mechanisms, anticondensation heaters and motors. Daniel tinsley senior manager of power maintenance cta chicago, il. Chapter 11 transit traction power track design handbook. The dc system feeds catenaries of tramways or the third rail of metros, for example.
The collector substation can also provide power factor correction if it is needed, metering and control of the wind farm. This online engineering pdh course series presents an overview of modern electrical substations, emphasizing their importance for reliable and effective operation of power systems. Ieee substations standards collection is a single source for design construction and operation of power substations. The purpose of this document is to provide a general guide to the design of an air insulated switchgear ais and a gas insulated switchgear gis of an ac substation. This design has been used extensively for many years. From the above information, finally, we can conclude that a subsystem is an essential part of a power grid, and forms a. Substation auxiliary power supplies engineering360. Traction power positive supply system, including substation locations a. Example of substation design electrical part 65 14. Track and traction power teams are working together to improve third rail insulator design and. During normal operation, the batteries are trickle charged by the charger and remain on standby. Iem power systems is a premier supplier of electrical equipment and substation packages. Transmission owner guidelines transmission owner technical guidelines and recommendations are listed below and are published by the transmission and substation subcommittee tss.
Implementation of an offtheshelf solution for substation design which supports electromechanical, civil and electrical design. While the tpss can be a constructed building into which equipment is installed, most substations for new and renovated light rail systems are modular, factory assembled units that are delivered to the site complete. With the advent of 3 phase drives the dc voltage is not a design requirement for the traction engineer due to the. Expert instructors with decades of substation design experience will guide you in learning how to develop reliable substation. Substation design volume ii physical layout instructor. In this article, i will share the book of substation design, chapters covered in the book, total pages in the book, author of the book, etc.
Power substation design calculations a checklist of 18. The design based substations are indoor, outdoor, foundation mounted and pole mounted substations. Normally, the trains of a umts requires a dc power supply by means of rectifier ac dc substations, know as traction substations ts. Ieee guide for the design and installation of cable. The power supply network is composed of a high voltage network fed with ac linked to a traction network fed with dc by traction substations. Exelons new distribution center dc substation design has redefined the fundamental nature of an electric substation.
Our team has a thorough knowledge of substation design, as well as wealth of. At present, the following electrical safety stan dards are available for use as a basis for design. The solution will be based on implementation of an offtheshelf system or systems, with preparation for work at iec israel. Electrical book of substation design hello guys, welcome back to my blog. The document is divided into 12 chapters starting from electrical arrangement to lightning and earthing protection. What structural engineers should know about substation rigid bus design. The fence is connected to a separate grounding conductor. 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. Aging transmission and substation infrastructure poses risks to the energy grid, and we must protect and strengthen it. Abstractthe most critical component of a protection, control, and monitoring system is the auxiliary dc control power system. Added an example of cable system design in annex o for a small substation k removed the fire systems clauses and recommended these be included in.
It is used to switch generators, equipment, and circuits or lines in and out of a system. After an agreement is reached with the power company, the traction power designer can finalize the substation design. Ieee standard 80, guide for safety in ac substation grounding, which defines methods for calculating safe touch and step potential, and is widely used in the transportation industry for traction power substation grounding. Ieee 605 is a great source for substation rigid bus design. Auxiliary dc control power system design for substations. Selection of the location of a substation must consider many factors. Gas insulated substations conference 2018 in washington dc. This fundamental course leads you through a stepbystep study of the substation design and construction process. Railway infrastructure direct current electrical substation. Weve seen the pitfalls and the hurdles, and know the strategies to keep an electrified rail system moving even while the power system is under replacement. Before 1960s the design criterion of substation earthing system was low earth resistance. In high and medium voltage air insulated substations ais the electromagnetic field, which causes are the static charges of bare cable and conductors and by the atmospheric conditions surges, induce voltages at nolive parts of the installation that create potential differences between metallic parts and ground and also between different points of. Abstractthe most critical component of a protection, con trol, and monitoring system is the auxiliary dc control power. Washington metropolitan area transit authority washington, dc.
Exelons new distribution center dc substation design has redefined the fundamental nature of an electric substation in suburbia. Substation design manual v reference ni000401r121 ver 2 ergon energy corporation limited abn 50 087 646 062 ergon energy queensland pty ltd abn 11 121 177 802 15. Inspections and tests in situ prior to putting into service 61. Design of power supply system in dc electrified transit.
That is why we are proposing the capital grid project, a major effort that will allow us to better serve our customers in the district and maryland. Medium voltage products technical guide the mvlv transformer substations passive users 1 2 1. Design of earthing grounding system in a substation grid. Auxiliary dc control power system design for substations michael j. Electric substations with equipment used to convert highvoltage, extrahighvoltage ehv, or ultrahighvoltage uhv transmission lines to the intermediate voltage subtransmission lines or to switch subtransmission circuits operating at voltages in the range of 34. It will be interconnected to the rest of the network via three transmission lines terminating at three different substations, namely terminals greenbay, newhaven and hudson respectively. A new 230 kv substation named east central is planned. Direct current electrical substation dc ehouse railway infrastructure customized walkin metal enclosure specifically built to protect the electrical equipment in your dc railway substation customer benefits and savings. All rus borrowers rus electric staff effective date. One typical example for a 125 v system is shown in figure 1 below. This bulletin is an update and revision of previous rea bulletin 651, design guide for rural substations revised june 1978.
Medium voltage products technical guide the mvlv transformer. Other requirements of the substation electrical system 56 10. 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. Apply to designer, electrical designer, electrical engineer and more.
Vernon hartsock chief engineer mta maryland baltimore, md. Generally dc power is used for this purpose instead of ac, since the reaction time of the protecti. Ergon energy corporation limited abn 50 087 646 062 ergon energy queensland pty ltd abn 11 121 177 802. Vuspec summary ieee power substations standards collection included active standards covering switching stations, transformer stations, and generating station switchyards. This equipment is a compact multicomponent assembly, enclosed in a ground metallic housing, which the primary insulation medium is a compressed gas. Design of the ac and dc auxiliary systems reliability, load requirements, system configuration, personnel safety, safe and reliable operation protection.
Transfer of risk from client to abb for coordinating design interface of all elements in the package. Power system modelling for urban massive transportation. Transmission owner technical guidelines and recommendations are listed below and are published by the transmission and substation subcommittee tss. Hvdcat high voltage direct current autotransformer ied intelligentelectronicdevices. The capital grid project is a forwardlooking plan that, if approved, will.
We offer high quality individual components or a whole package incorporating all key equipment required for a complete, integrated substation solution at competitive prices. Substations a substation is a highvoltage electric system facility. 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. Vii, chapter 2, contact rail and protective coverboard design criteria. It also is used to change ac voltages from one level to another, andor change alternating current to direct current or direct current to alternating current. It draws attention to the effect that the hazard of shortcircuit over many miles of conductor rail has upon the arrangement and design of plant and apparatus. Wherever you are, siemens is your reliable partner for the onestop planning and construction of customized, stateoftheart highvoltage. The objective of the analysis is to provide a new grid design for the east central substation. Wmata has used the orange boot design for connecting the feeder from the traction power substation and the jumper cables to the web of the third rail. Offshore wind, wind turbines, dc collection, dc transmission, platformless.
First, the paper describes the wind turbine drivetrain arrangements feasible. Ieee guide for the design and installation of cable systems in substations sponsor substations committee of the. The lowvoltage ac and dc auxiliary systems comprise very important parts of the substation equipment. Failure of the dc control power can render fault detection. When choosing between ac or dc for connecting offshore wind farms to the grid, the main parameters to be considered are rated power, distance to shore and the distance on shore to the nearest strong grid connection point, which can be up to 100 km away as landfall is often located in lightly populated areas where the transmission grid is weak.
Dc dc converter no yes yes high design of resonant tanks hvdc chopper no yes yes, requires fb sms high requires series igbts hvdcat. While each substation is unique, there are several categories that can be identified based on their location and intended purpose as summarized in table 1. Distribution substations michigan technological university. Station service ac dc cable list schematics ac dc control panel wiring equipmentbreakerstransformers wiring communication. Substation design guide a pdh online course for engineers.
1283 726 1380 514 1356 1123 803 731 69 1445 657 316 477 798 190 35 953 1430 219 153 171 1251 1130 1505 1408 298 629 1143 303 1074 584 225 1382 227 1490