This book represents text on HVDC transmission available. It deals with the various aspects of the state of the art in HVDC transmission technology. This book presents many aspects of interactions of AC/DC systems. Modeling and analysis of DC systems are also discussed in detail.

The fast development of power electronics based on new and powerful semiconductor devices has led to innovative technologies, such as high voltage dc transmission (HVDC) and flexible ac transmission system (FACTS), which can be applied in transmission and distribution systems. The technical and ...

At the beginning of the 70's, UHV transmission was regarded as imminent in many countries in view of the expected concentration of generating units (possibly of the nuclear type and grouped together in a few large plants, each of several GW), and research...

The displacement or deferral of conventional AC transmission line installation is a key benefit associated with several technologies being developed with the support of the U.S. Department of Energy's Office of Energy Management (OEM). Previous benefits a...

Consultants from three engineering firms discussed problems associated with the transmission of power at higher and higher voltages. They predicted a rapid increase in application of both ac and dc ehv transmission, radical departures in design of circuit breakers, faster relaying, and development of new insulation materials for better ...

This study evaluated the technical and economic suitability of many of the underground power transmission systems that may be available in the 1990's. The systems considered included cellulose-, polyproplyene-, and gas-insulated cables, oil-filled cables and cryogenic cables for 345 kV to 765 kV ac or dc systems and superconducting cables for 230 ...

and Demand Database, 2005, http://www.nerc.com/~esd/Brochure.pdf Notes: 1 Circuit miles of AC lines 230 kV and above. 2 Data includes both existing and planned transmission lines...

... Title : High Voltage AC Power Transmission Lines and Communications Receiver Sites. Descriptive Note : Technical rept. May 75-Mar 76,. ...

Three power-system options are considered with respect to utilization on a lunar base: the fully centralized option, the fully decentralized option, and a hybrid comprising features of the first two options. Power source, power conditioning, and power transmission are considered separately, and each architecture option is examined with ac and dc ...

... and power transmission technologies are important. Descriptors : *SYMPOSIA, *HELICOPTERS, *HELICOPTER ENGINES, *TRANSMISSIONS( ...

The major issues examined in the comparison of the DIST and HNEC transmission concepts are: (1) type of transmission to be employed and an assessment of its technical feasibility, (2) availability of rights-of-way, (3) economics, (4) environmental impact, and (5) overall reliability of the transmission system. The type of ...

... the powers which are maximum under the conditions of retaining the superconducting state and of the steady-state stability of power transmission ...

The purpose of this study was to develop an assessment of the national utility system`s needs for electric transmission during the period 1995-2020 that could be met by future reduced-cost HVDC systems. The assessment was to include an economic evaluation of HVDC as a means for meeting those needs as well as a comparison with competing technologies such as ...

... Title : Geared Power Transmission Technology,. ... Descriptors : *Transmission gears, *Transmissions(Mechanical), *Helicopter engines ...

This conference examined the following aspects of 750 to 1500 kV ac power transmission systems and equipment: trends in systems and equipment development; electric field measurements and the consideration of electric fields in EHV and UHV ac system design...

Breakthroughs in high-voltage direct-current (HVDC) conversion technology and economics will permit electric utilities to develop a complementary blend of alternating (ac) and direct (dc) current applications to their systems. HVDC is especially suited to long-distance transmission from remote nuclear plants and as an interconnect ...

The report recommends research program to lower the cost of placing transmission lines underground and to improve transmission technology. It presents an accelerated plan to place transmission lines underground within a reasonable period of time. The report envisions full cooperation among all segments of the power ...

More dc projects will be commissioned in the future mainly due to the high value placed on the environment. Strides have been achieved in valve technology, in station size reduction, and in simplicity. The justifications for dc transmission are long distance, bulk transmission for economy; stabilizing links between pools; and ...

Mid to late 1980's power management technology needs to support development of a general purpose space platform, capable of suplying 100 to 250 KWe to a variety of users in low Earth orbit are examined. A typical, shuttle assembled and supplied space platform is illustred, along with a group of payloads which might reasonably be expected to use such a facility. Examination of ...

With the increasing use of dc transmission in existing ac networks, the possibility of ac and dc circuits running parallel to each other and sharing the same right-of-way or even the same tower is increasing. It is important from the point of view of design of such hybrid ac/dc transmission ...

This paper will review potential power system concepts for the development of the lunar outpost including power generation, energy storage and power management and distribution (PMAD). In particular, the requirements of the initial robotic missions will be discussed and the technologies considered will include cryogenics and regenerative fuel cells (RFC), ...

The technical and economic assessment of AC and DC transmission systems; long distance transmission, cable transmission, system inter-connection, voltage support, reactive compensation, stabilisation of systems; parallel operation of DC links with AC systems; comparison between alternatives for ...

A delegation from the U.S. attended the first meeting in Moscow in 1974 to negotiate the method of exchanging technical data and to establish areas for joint research. Two symposia were organized to deal with a-c and d-c transmission technology. Joint a-c transmission research was planned on ...

... Title : Investigation of the Static Stability of Long-Distance AC Transmissions with Respect to Equivalent Transfer Functions and the Static ...

This paper discusses results of an EPRI contract on control design for an ac/dc transmission system to increase power transfers limited by dynamic stability. The control is achieved by modulating the rectifier dc current or power and the inverter dc voltage. Coordinated active and reactive power modulation is accomplished by Linear Quadratic (LQ) control ...

with one of its top awards. Richardson was awarded the ACS Award for Creative Advances in Environmental Science and Technology at the ACS spring conference. ACS is the world's...

High voltage dc power transmission is technically and economically competitive today with extra high voltage ac. In the future, with semiconducting devices developed to the point where they can be substituted for mercury arc valves hvdc may offer even greater advantages. Recent advances in semiconductor technology have led to ...

The aim of the work is solution of the problems associated with synthesis of the digital speed regulators both for DC and AC thyristor electrical drives. The investigation is realized based on the parameters of continuous technological equipment (e.g. paper-making machine) by taking into account elastic transmission links of the drive ...

A micro-sonicator for spore lysis. Using micromachining technology, the micro-sonicator uses ultrasonic excitation of spores to perform spore and cell lysis. The micro-sonicator comprises a container with a cavity therein for retaining the sample in an ultrasonic transmission medium, the cavity being closed by a silicon membrane to which an electrode and ...

During the reporting period dielectric strength measurements were carried out in liquid helium under both ac and dc field conditions, using point-to-plane electrode geometry. In order to correlate the results obtained using point-to-plane electrodes with ...

A new concept is proposed for central station SPV power conditioning. It avoids heavy dc bus and extensive ac distribution, and so offers technical, cost, and efficiency advantages. Cost and efficiency comparisons with a more conventional approach, akin to that being implemented for the SMUD installation, are presented. Although the capital gains are not great, the ...

This article describes the use of high-voltage DC (HVDC) transmission systems for connection of large offshore wind farms using doubly fed induction generators (DFIGs) to the main grid. HVDC systems based on voltage source converters (VSC transmission) and on line-commutated converters (LCC HVDC) are discussed. The article describes proposed system ...

... Title : NASA Helicopter Transmission System Technology ... Descriptors : *Transmissions(Mechanical), *Helicopters, *Helicopter engines ...

It can be said that, with respect to reliability, the dc transmission system studied for Churchill Falls offers the same degree of reliability as the 735 kV ac transmission system. All analog studies whether ac or dc assume, of course, that the equipment conforms to certain performance specifications. From the ...

Structural and compositional studies of nanomaterials of technological importance have been carried out using advanced electron microscopy methods, including aberration-corrected transmission electron microscopy (AC-TEM), AC-high angle annular dark field scanning TEM (AC-HAADF-STEM), ...

The objective of the program was to study the feasibility of Nb3Ge being used as an AC superconducting power transmission cable material. Specifically, the program was to measure AC losses in available samples of Nb3Ge and find under what conditions the l...

HVDC transmission has been found to be an attractive alternative to ac transmission in many situations. Evaluations of HVDC alternatives include technical, economic, environmental and sometimes regulatory considerations which are different than those for ...

A short discussion of the effects of the Electromagnetic Interference (EMI) radiated from High Voltage AC (HVAC) Power Transmission lines on HF Communications Receivers is followed by the description of a method for choosing communications receiver sites ...

This bibliography represents an attempt to draw together an annotated listing of the literature on ac power transmission at 600 kV and above. All pertinent periodical articles, reports and conferences published from 1960 through 1967 have been included in...

Since 1995 Southwire Company and Oak Ridge National Laboratory (ORNL) have jointly designed, built, and tested nine, l-m long, high temperature superconducting (HTS) transmission cable prototypes. This paper summarizes the AC loss measurements of five of ...

A bibliography is presented of 747 abstracts of literature on ac power transmission at 600 kv and above. An author index is included. (LCL)

A compact, easy to fabricate, noninductive, low surface magnetic field superconductor transmission line that has minimal stay fields is described.

... Abstract : If the presently installed three-phase ac transmission system on aircraft were replaced by a higher voltage dc (HVDC) transmission using ...

References are contained for HVDC systems, converter stations and components, overhead transmission lines, cable transmission, system design and operations, simulation of high voltage direct current systems, high-voltage direct current installations, and flexible AC transmission system (FACTS).

for the Kayenta 230 KV substation advanced series compensation," AC and DC Power Transmission IEEE Conference

... was developed and implemented to study these discharges under conditions found in proposed ac superconducting power-transmission lines. ...

... The constant LRC model with the AC resistance showed potential for predicting the gain in fluid transmission lines with turbulent flow. ...

... rectifying the AC voltage signals generated by the ... and a source impedance 91 represent the ... Disclosed Method" section, of a transmission line ...

Recently proposed synchrotrons, SF-SPS at CERN and DSF-MR at Fermilab, would operate with a 0.5 Hz cycle (or 2 second time period) while accelerating protons to 480 GeV. We examine possibilities of superconducting magnet technology that would allow for an accelerator quality magnetic field sweep of 2 T/s. For superconducting magnets the cryogenic cooling power demand due to ...

During recent yeas the subject of high voltage direct current power transmission has stimulated a great deal of interest among power system engineers. Several aspects of hvdc techniques and technology have been discussed in recent technical literature. A subject which has received relatively scant attention in the published literature so far is that of ...

A new type of series capacitor, controlled by thyristor switches, is presented. Its major components, basic operating modes, and control/protection system are described. With respect to the first installation at the Slatt substation, the design, ratings, and test program are summarized. A major program to develop new technologies for enhancing power ...

The report describes the fundamental operating principles of ac Uninterruptible Power Supplies (UPS). It explains the different design approaches and guides the reader towards the most appropriate technology for a given application. The report covers the ...

Amorphous carbon (a-C) films grow via energetic processes such as pulsed-laser deposition (PLD). The cold-cathode electron emission properties of a-C are promising for flat-panel display and vacuum microelectronics technologies. These ultrahard films consist of a mixture of 3-fold and 4-fold coordinated carbon atoms, resulting in an ...

This paper describes historical trends of electric power system simulation technology. The first paper concerning power system simulation study was published in 1916, sixteen years later after the year 1900 when a practical high voltage three-phase ac power transmission line was constructed and put into operation in USA. Historical ...

� Long term economic models identify lower cost transmission alternativescost transmission alternatives on the HVDC lines AC li l di t i ll i th 40%� AC line loading typically run in the 40% range #12;Transmission � WWW. JCSPStudy.org � NREL/EWITS Study � MISO ...

... the technology of aerospace transmissions. ... accomplishments in transmission diagnostics research at ... Descriptors : *AIRCRAFT, ARMY RESEARCH ...

... into an existing transmission with minimum ... Gears, Transmissions(Mechanical), *Helicopter engines, *Helicopters, *Technology transfer ...

... on the 500-hp transmission are: High ... Descriptors : *Transmissions(Mechanical), *Helicopter engines, *Helicopters, *Technology transfer ...

High-temperature superconducting (HTS) cables are expected to be next generation transmission line because of the compact, lightweight, large capacity, and low loss features. Especially, since the YBa2Cu3Ox (YBCO) tape has a high critical current, high magnetic-field property, low AC loss, and low cost, using YBCO tapes for a HTS cable seems to be one of ...

... Accession Number : AD0758348. Title : Automobile Transmission Oil,. Corporate Author : FOREIGN TECHNOLOGY DIV ...

Much of what is known today about hemipteran feeding biology, as well as mechanisms of their host plant interactions and transmission of phytopathogens, has been learned via use of electrical penetration graph (EPG) technology, originally called electronic monitoring of insect feeding. Key to all of this information has been the electronic designs of EPG ...

The overhead transmission of relatively large amounts of power over long distances--500 to 2,000 MW per circuit over 300 to 900 miles is discussed. Estimated costs and operating characteristics are given and the state of development of equipment for both ac and dc ehv transmission is reviewed. Comparisons are made for 345, 500 and 700 ...

Issues regarding the construction and operation of a stationary lunar surface power system that must be resolved in order to create a permanent manned presence on the moon are addressed. The issues considered include: (1) the centralization or decentralization of the electrical power system; (2) whether power transmission should be ac or dc; (3) what mix ...

The map displays extra-high voltage electric transmission lines (345 kilovolt ac, 500 kilovolt ac, 765 kilovolt ac, +-400 kilovolt dc, and +-250 kilovolt dc capacities) in the 48 contiguous states (plus the District of Columbia). Also shown are major cities, substations, and generatings interconnected with the ...

An annual map shows the location of extra-high voltage electric transmission lines (345 kilovolt ac, 500 kilovolt ac, 765 kilovolt ac, +-400 kilovolt dc, +-250 kilovolt dc capacities) in the 48 contiguous states and the District of Columbia. Major cities, substations, and generating plants interconnected with the ...

An annual map shows the location of extra-high voltage electric transmission lines (345 kilovolt AC, 500 kilovolt AC, 765 kilovolt AC, +- 400 kilovolt DC, +- 250 kilovolt DC capacities) in the 48 contiguous states and the District of Columbia. Major cities, substations, and generating plants interconnected with the ...

The map displays extra-high voltage electric transmission lines (345 kilovolt ac, 500 kilovolt ac, 765 kilovolt ac, +-400 kilovolt dc, and +-250 kilovolt dc capacities) in the 48 contiguous states (plus the District of Columbia). Also shown are major citi...

This paper discusses the characteristics of the concept and includes discussion of the system constraints, including traction battery constraints, and brief descriptions of the major subsystems being developed. The components discussed include: the system controller, dc to ac inverter, an internal permanent magnet ac motor and a two-speed automatic ...

This paper summarizes the results of a study conducted by the US Department of Energy, Office of Energy Storage and Distribution, to determine generic cost differences between dc and ac systems, and to identify situations where dc is clearly advantageous for long distance and bulk power transport. Data are presented which can aid in determining dc converter station costs as a ...

We present here results of our study of the 5-m-long AC transmission tine model with 1 kA current capability at 77 K. Primary attention was paid to the current characteristics and AC losses in individual tapes and in the core of the cable. The losses were...

... Study of Wireless Transmission Protocol Technology for Use in Flight Line Environment to Assist the Data Loading and Downloading on Aircraft. ...

(TnCPV), Autographa californica nucleopolyhedrovirus (AcMNPV), and AcMNPV engineered to express to the Autographa californica NPV (AcMNPV), a virus which has been studied ex- tensively at the molecular level polyhedrosis viruses of Autographa californica for mortality, virus replication and polyhe- dra production

... Accession Number : ADA520748. Title : Technology Transfer: Advancing Warfighting Capabilities, The AC-130 Gunships Unleashed. ...

... Accession Number : ADA048806. Title : Advanced Semiconductor Technology for Alternate Energy Sources - DC to AC Inverters,. ...

... The four technical architectures are: Medium Volt AC Power Generation (MVAC), High Frequency AC Power Generation (HFAC), Medium Voltage ...

This paper summarizes the results of a study conducted by the US Department of Energy, Office of Energy Storage and Distribution, to determine generic cost differences between dc and ac systems, and to identify situations where dc is clearly advantageous ...

The purpose of the study reported here was to examine generic cost differences between direct current (dc) and alternating current (ac) systems and to identify situations in which dc is clearly advantageous for long distance and bulk power transport. The ...

The phenomena of induced AC on pipelines sharing common rights-of-way with overhead high-voltage electrical transmission power lines is discussed. Basic concepts and techniques for personnel safety and some pipeline protective measures are reviewed.

The performance of SVC's on an ac network containing series-compensated lines creates some new application considerations. These considerations are defined in this paper.

KAIST maeng@kaist.ac.kr Embedded ComputingEmbedded Computing #12;22004 (jinsoo@cs.kaist.ac.kr)2007 Spring SEP561 Embedded Computing Three key embedded system technologies Three key embedded system@cs.kaist.ac.kr)2007 Spring SEP561 Embedded Computing Processor technologyProcessor ...

KAIST maeng@kaist.ac.kr Embedded Computer Systems Embedded Computer Systems #12;22004 (jinsoo@cs.kaist.ac.kr)2007 Fall CS310 Embedded Computer Systems Three key embedded system technologies Three key embedded@cs.kaist.ac.kr)2007 Fall CS310 Embedded Computer Systems Processor technologyProcessor ...

An application of high speed reclosing for UHV a.c transmission lines is expected to secure high reliability of transmission system. In order to choose dead times of high speed reclosing property, it is necessary to clarify forced extinction characteristi...

2 33 3 3 1 1 1 1 1 1 2 2 Network of offshore wind farms connected by gas insulated transmission is a GIL? Why GIL? Acknowledgements Network of wind farms Comparison with other transmission systems AC wind farms in one line over the German island Norderney. 3 GIL is an AC transmission system for ...

The merits of hvdc and uhv ac transmission systems were discussed at an international conference of Electrical Engineers in London, Nov. 1973. Environmental aspects are discussed in relation to increased power-transmission ratings. Within the next decades, power generation will be concentrated in huge blocks of power between ...

Applying anti-corrosion grease and aluminum clad steel (AC) wires to ACSR has adopted as general methods to prevent overhead transmission line conductors and/or wires from corrosion. However, there are some cases that ineffectiveness of those means are reported on some transmission lines passing through acid atmosphere in the vicinity ...

This report reviews a number of issues specific to stand-alone AC lighting systems. A review of AC lighting technology is presented, which discusses the advantages and disadvantages of various lamps. The best lamps for small lighting systems are compact f...

In order to apply widely the superconductivity technology to electric power equipments, the development and evaluation on the AC superconducting cables have been conducted in the Central Research Institute of Electric Power Industry. The superconducting c...

Gas transmission pipelines often share a common corridor with electric power transmission lines. Magnetic-field coupling from the power line can induce ac voltage between the pipeline steel and the earth. With induced ac voltage on the pipeline, conditions that influence ac-enhanced corrosion ...

During the reporting period, breakdown measurements with ac, dc, and impulse voltages were taken on several polymer film samples immersed in boiling liquid helium. The observed impulse strengths were found to be a factor of two to a factor of three higher than previously-measured ac strengths. Progress was made on experimental equipment, including ...

and sensitivity can be increased significantly. This paper discusses how AC electro-osmosis (ACEO) is applied). AC electroosmosis (ACEO) is a newly developed microfluidic technology, and this paper presents how. AC ELECTROOSMOSIS MECHANISM AC electroosmosis is based on the fundamental principle ...

HVDC power transmission has increasingly acquired practical importance and a number of large-scale projects such as the 2000-MW system connecting Britain and France and the 6000-MW system in Italy and Brazil are under way. In Japan, three HVDC installations are in operation, and a stepped-up effort is directed toward the advancement of dc technology with ...

Technologies that will have an impact on electric power transmission and generation from 1982 to 2000 are assessed. Costs, availability, advantages, and other factors are discussed for LWRs, HTGRs, breeder reactors, and offshore nuclear power plants. Current research activities on fusion and molten-salt breeder reactors are summarized. A ...

Economic considerations of long distance extra high voltage ac and dc transmission are discussed. Voltages above 500 kV ac are briefly considered. The conclusion reached is that the design layouts performed with due consideration of the progress to be expected in the development of high voltage engineering show the application of dc to ...

A method is developed for calculating the induced voltages on fence wires/pipelines underneath AC power transmission lines. The method is based on the charge simulation technique and takes into account the disturbances of the electric field and potential due to the presence of the fence wire/pipeline underneath the line. The calculated values of the ...

A device is disclosed for connecting a tuned power transmission line to an ac network includes the following units that are serially interconnected in any combination: a phase transposition unit for phase shifting the voltage through an angle which is a multiple of the natural shift of voltages of opposite phases; a coupling transformer with a switchable ...

A study comparing the results of a digital computer program and an hvdc simulator is reported. The digital computer program permits the study of combined ac-dc systems, and provides a complete representation of one or more hvdc transmission systems in a large scale interconnected ac system. The hvdc simulator is a model of the dc ...

The power quality on the transmission lines is less of a concern with an AC system. At the point of use (power distribution) we will need to use Delta to ...

... Using trigonometry, AC =CB= CE·sin(90-� ... Since the invention of the modern laser in 1960,2 ... in transmission geometry, and a formula describing the ...

... (Author). Descriptors : *Ice, *Ice formation, *Electric conductors, *Cold weather tests, Transmission lines, Electric fields, Test equipment, Aluminum ...

A power grid is a transmission network transporting electrical energy from power plants to some substations near urban or industrial centers. To reduce the loss ...

A separate abstract was prepared for each of the three volumes of this report for the Energy Data Base. (RCK)

of DC and AC transmission to enable development of 10 GW of wind power in western Texas. And TransCanada

TERRESTRIAL HYDROSPHERE >WATER QUALITY/WATER CHEMISTRY >LIGHT TRANSMISSION [ Definition] ... National Institute for Water and Atmosphere Research ...

The status of ehv construction until 1970 is reviewed. Between 1964 and 1970 there will be 3,230 miles of transmission lines at 500 kV ac and higher constructed.

We have developed a new superconducting digital technology, Reciprocal Quantum Logic, that uses ac power carried on a transmission line, which also serves as a clock. Using simple experiments, we have demonstrated zero static power dissipation, thermally limited dynamic power dissipation, high clock stability, high operating margins, ...

This poster describes the assessment of commercially available and prototype parallel optics modules for possible use as back end components for the Versatile Link common project. The assessment covers SNAP12 transmitter and receiver modules as well as optical engine technologies in dense packaging options. Tests were performed using vendor evaluation boards (SNAP12) as well ...

The goal of DOE's Electric and Hybrid Vehicle Program is to advance technologies for electric and hybrid vehicles in order to enhance their potential as transportation options of national significance. Successful achievment of this goal will ultimately result in significant petroleum savings to the nation. However, the design, performance, and cost of propulsion ...

The goal of DOE's Electric and Hybrid Vehicle Program is to advance technologies for electric and hybrid vehicles in order to enhance their potential as transportation options of national significance. Successful achievement of this goal will ultimately result in significant petroleum savings to the nation. However, the design, performance, and cost of propulsion ...

For attenuation correction (AC) of 201Tl myocardial perfusion images, an accurate attenuation map is required. This study assessed whether prolonged transmission scanning is required in obese compared to normal-sized patients. Twenty-nine obese patients (mean body mass index 33 kg m-2) underwent sequential emission/transmission imaging ...

As an outgrowth of the Technology Reinvestment Program of the 1990�s, an Agreement was formed between BWXT and the DOE to promote the commercialization of Superconducting Magnetic Energy Storage (SMES) technology. Business and marketing studies showed that the performance of electric transmission lines could be improved with this ...

Cleveland Electric Illuminating Co. and Ohio State University present (1) a model of the system involving parallel pipelines and power transmission lines and (2) equations to accurately predict the expected induced voltages on pipelines. Case histories of tests include evaluations of variables influencing induction.

... A1b, A2, and type B by adult American dog ticks. Similar to a previous study that evaluated transmission efficiency of the same bacterial strains by D. variabilis nymphs (Reese et al. 2010), we observed ac...

Temperature control of Fano resonances and transmission in superconducting metamaterials V *vaf@orc.soton.ac.uk Abstract: Losses are the main evil that limits the use of metamaterials to the metamaterial structures. An exception is superconducting metamaterials, where Joule losses can be uniquely

The technical and environmental considerations involved in HVDC Converter Terminal design with respect to the Square Butte HVDC Project are reported. Considerations are encountered in HVDC stations which are not generally familiar to the utility engineer involved with AC systems. Design of the transmission line is not covered.

Database, 2003, http://www.nerc.com/~esd/2003Brochure.pdf" "Notes:" "1 Circuit miles of AC lines 230 kV and above." "2 Data includes both existing and planned transmission lines"...

Database, 2005, http://www.nerc.com/~esd/Brochure.pdf" "Notes:" "1 Circuit miles of AC lines 230 kV and above." "2 Data includes both existing and planned transmission lines"...

An overview is presented of some of the areas to be considered in the design and implementation of transmission cables for an Ocean Thermal Energy Conversion (OTEC) power plant. These considerations include choice of ac or dc cable system, voltage level, environmental problems, and selection of insulation. (LCL)

Undersea transmission lines and shoreline AC-DC conversion stations and near-shore transmission lines are being considered as part of a system for transporting energy between the Hawaiian Islands. These facilities will need to be designed so that they wil...

The project proposes construction of additions to BPA's electric transmission system including transmission lines, substations, and related structures; maintenance of existing facilities including repair of equipment, structures, aerial conductors, and ac...

Contents: A rated voltage of 1,200 kv for A-C power transmission; Finding the optimum parameters for an EHV line; Calculations on transients in long lines; Operational method for calculations on transients in lines with lumped inhomogeneities, using the d...

The design and testing of a cryogenic bushing for the termination of a 138 kV 3-phase superconducting power transmission line are discussed. Three combined voltage and current bushings have been tested. Vacuum leaks and refrigerator capacity have limited ...

The status of attempts and techniques to reduce audible noise and corona generation and losses in EHV AC overhead power transmission lines in general is reviewed. A number of other promising concepts are identified. The correspondence between available au...

Progress in a program for evaluating underground dc transmission systems is reported. A representation of a futuristic development of a large ac power system was used for a basic load flow model. This model will be adjusted to produce three representation...

The electrical effects of power transmission lines and the effects that such lines may have on man and his environment are described. The electric effects include corona discharges, electric and magnetic field effects of ac lines, and induced currents and...

This booklet describes the electrical effects of ac and dc transmission lines and reviews the state-of-the-art knowledge on the possible biologial effects of such lines. Electrical effects are defined as those resulting from electric and magnetic fields a...

A method and apparatus for locating defects in electrical conduits, hollow cables, or pipes above the ground, using a transmission line wherein one of the lines is the conduit under test. A high-frequency AC generator is used to feed the transmission line...

Corona cages have been in use as a means for predicting AN and RI generated from DC transmission lines. The static conductor surface gradient is used as the main variable in predicting corona performance of AC transmission line. However, this method canno...

A wide range of power system expansion planning techniques require a very large number of solutions for the real power flows in the line for a given transmission network. The use of complete A-C load flow techniques for solving the exact nonlinear equatio...

...2011-04-01 false Standards for technologies for electronic transmission of orders...General § 1311.05 Standards for technologies for electronic transmission of orders...II controlled substances may use any technology to sign and electronically...

... C IDescription of CE Technology For The I Manufacturing Optimization (MO) System ... CDRL No. 0002AC-2 I Description of CE Technology For The ...

The genome of the baculovirus Autographa californica nuclear polyhedrosis virus (AcMNPV) contains two homologues, orf145 and orf150, of the Heliothis armigera Entomopoxvirus (HaEPV) 11,000-kDa gene. Polyclonal antibodies raised against the Ac145 or Ac150 protein were utilized to demonstrate that they are expressed from late to very ...

The genome of the baculovirus Autographa californica nuclear polyhedrosis virus (AcMNPV) contains two homologues, orf145 and orf150, of the Heliothis armigera Entomopoxvirus (HaEPV) 11,000-kDa gene. Polyclonal antibodies raised against the Ac145 or Ac150 protein were utilized to demonstrate that they are expressed from late to very ...

Underground transmission systems installed in the immediate future, manufacturers agree, will continue to employ low pressure, oil-filled, lead covered cable and high-pressure, oil- or gas-filled, pipe-type cables. These systems have proved reliable and versatile over many years and, they say, can be depended upon to meet requirements of more or less standard applications ...

This working group report presents dc benchmark models tailored to ac/dc interaction. This is to encourage comparisons of the performance of different control strategies or computational tools related to various ac/dc interaction phenomena and system dynamic performance. System data and results are available on diskette or through e-mail.

Development of techniques and analytical tools for utilizing the inherent controllability of multiterminal hvdc transmission to enhance the performance of an integrated ac/dc power system were explored. Specific investigations that were performed during the course of the project were described, including steady state operation of ac/dc ...

The possibility of abnormal harmonic generation in an ac system feeding a converter load is examined from the standpoint of automatic control systems used in modern hvdc transmission systems. It is shown that with certain types of automatic controls, the firing angles of converter valves may sustain some errors, which in turn could generate abnormal ...

lenses allow light transmission so that the view of the instruments is unimpeded . ... Light transmission through the lenses can be selectively ...

... Title : Data Transmission Systems. Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH. Report Date : 1986. ...

SUBTOPIC TITLE: Wireless Power Transmission ... As such they would provide a key technology element for wireless power transmission systems that are based ...

The publication collects and summarizes the specialized information needed to operate the ac-dc difference laboratory and calibration service at the National Institute of Standards and Technology (NIST) in Gaithersburg. It also serves as a convenient refe...

The case for dc versus ac power transmission is reviewed. It is concluded that for long transmission distances, i.e. more than 800 km (500 miles), dc transmission is cheaper and probably more reliable. The 1.0-MV Pacific Intertie is cited as an example of a modem efficient dc system.

A detailed study is presented of the economics of conventional underground transmission lines utilizing oil-paper insulated pipe-type cables. Three cryogenic ac transmission lines, cooled, respectively, by nitrogen, hydrogen, and helium, are compared with conventional cables and overhead lines. The nitrogen-cooled system, so ...

References are contained for HVDC systems, converter stations and components, overhead transmission lines, cable transmission, system design and operations, simulation of high voltage direct current systems, high-voltage direct current installations, and ...

We present here results of our study of the 5-m-long AC transmission tine model with 1 kA current capability at 77 K. Primary attention was paid to the current characteristics and AC losses in individual tapes and in the core of the cable. The losses were measured as a function of AC magnetic field amplitude in ...

Eleven papers prepared for presentation at a symposium to be held during 1982 in the USA on scientific cooperation between the US and USSR in the field of research, design and operation of ehv/uhv ac and dc power transmission systems are included. A separ...

Eleven papers prepared for presentation at a symposium to be held during 1982 in the USA on scientific cooperation between the US and USSR in the field of research, design and operation of ehv/uhv ac and dc power transmission systems are included. A separate abstract was prepared for each paper. (LCL)

Considerable incentives exist for utilities to place hvdc transmission lines along the same right of way as ac lines. One consequence of such an application is steady state induction of fundamental frequency voltages into the dc circuit. The resulting current ripple on the dc converter can cause continuous offset transformer saturation, with many ...

The existing experience in building AC transmission models for investigation of transient processes indicates that such models, when the usual 50 cps frequency is used, are extremely bulky and expensive structures. This becomes apparent in particular in a...

.................................................................................................................. 16 6.5 Locating faults on underground cables, paralleled cable circuitsIEEE Std C37.114TM-2004 C37.114TM IEEE Guide for Determining Fault Location on AC Transmission-2004 IEEE Guide for Determining Fault Location on AC ...

This article describes the use of thyristor-based controllers for more efficient and reliable power line performance. The topics of the article include the flexible ac transmission system, linking power systems, limiting parameters for power flow, the static var compensator, the subsynchronous resonance damper, the thyristor-controlled series capacitor, ...

The following topics were discussed from the papers: 750 to 1500 kV ac transmission, electric field, overvoltage and lightning protection, air gaps and overhead line insulation, overhead line design, ice and wind loads, and conductors. (DLC)

The following topics were discussed from the papers: 750 to 1500 kV ac transmission, electric field, overvoltage and lightning protection, air gaps and overhead line insulation, overhead line design, ice and wind loads, and conductors. (ERA citation 11:01...

Advantages of dc over ac for submarine cable links more than counter balance the economic factors involved by the need for suitable terminal equipment. When the power transmitted exceeds a certain limit, dc is the only practicable solution. The advantages of dc transmission are more strongly emphasized for insulated cables than for overhead lines. The ...

Simple approximate equations were proposed to estimate accurately the maximum electrostatic field value at 1m above the ground level under AC vertical double circuit transmission lines of low-reactance phase arrangement or one circuit energized on double ...

A Handoff Control Scheme Using a Restrictive Transmission for Data Services in DS-CDMA Systems Jin W. Chang and Dan K. Sung Communication Networks Research Laboratory, Dept. of EE, Korea Advanced-42-869-3439, E-mail: dksung@ee.kaist.ac.kr or jwchang@cnr.kaist.ac.kr ABSTRACT A handoff control scheme for data

This dissertation first develops an efficient solution technique for solving the steady-state electrical conditions of an integrated ac-dc power system based on the observation that the equivalent loads representing the dc network are independent of the ac load-flow solution. The absence of iterations back and forth between ac and dc ...