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Wednesday, May 13, 2020 | History

2 edition of Traction power converters with fault current interruption using controlled power devices found in the catalog.

Traction power converters with fault current interruption using controlled power devices

Zaiming Zhang

Traction power converters with fault current interruption using controlled power devices

by Zaiming Zhang

  • 295 Want to read
  • 29 Currently reading

Published by University of Birmingham in Birmingham .
Written in English


Edition Notes

Thesis (Ph.D) - University of Birmingham, School of Electronic and Electrical Engineering, Faculty of Engineering, 1998.

Statementby Zaiming Zhang.
ID Numbers
Open LibraryOL18046516M

Methods and apparatus for providing power to devices via an A.C. power source, and for facilitating the use of LED-based light sources on A.C. power circuits that provide signals other than standard line voltages. In one example, LED-based light sources may be coupled to A.C. power circuits that are controlled by conventional dimmers (i.e., “A.C. dimmer circuits”).Cited by: Power System Analysis è un libro di Das J.C. edito da Crc Press a luglio - EAN puoi acquistarlo sul sito , la grande libreria online.

impact of such converters on a power system will also be discussed. A brief overview will be presented on the methods to avoid such problems. The other aspect of this chapter will be the problem of Electromagnetic Interference (EMI) caused by power converters, which will be discussed in some detail. VII Power electronic converters- an overviewFile Size: KB. [6] Compensation Techniques The principles of both shunt and series reactive power compensation techniques are described below: Shunt compensation Shunt compensation, especially shunt reactive compensation has been widely used in transmission system to regulate the voltage magnitude, improve the Reactive power compensation using STATCOM.

The main branch includes a mechanical switch, breaker impedance, and bidirectional power electronics switches. In the fault-current-limiting branch, a fault-current-limiting circuit is introduced which contains n numbers of bidirectional switches and current-limiting inductors, which are connected in series to make the design modular in nature. In , he also worked at Rockwell Automation Canada and was responsible for the development of power factor compensation strategies for induction motor drives. His research interests include control and PWM for power converters in distributed generation, microgrid, renewable energy, electric motor drives, and custom power devices.


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Traction power converters with fault current interruption using controlled power devices by Zaiming Zhang Download PDF EPUB FB2

Studies have shown that 31% of failures in power electronic converters can be attributed to the failure of power devices while 60% of device failures are due to thermal stress.

Fault Current Limiter Based on Resonant Circuit Controlled by Power Semiconductor Devices Article in IEEE Latin America Transactions 5(5) - October with 80 Reads How we measure 'reads'. load equalisation and; in case of critical loads, in the event of supply failure, it provided enough time to activate standby power supply.

Except in those applications where these features (advantages) are absolutely necessary, ac motor-dc generator set can be replaced by a Use of Efficient Semiconductor Converters.

Static Power Converters. Switch-Mode Power (SMP) Supplies. Arc Furnaces. Cycloconverters. Thyristor-Controlled Reactor. Thyristor-Switched Capacitors. Pulse-Width Modulation.

Adjustable Speed Drives. Pulse Burst Modulation. Chopper Circuits and Electric Traction. Slip Frequency Recovery Schemes. Lighting Ballasts. Voltage Source Converters. The advantage of using power converters (such as the architecture shown in Fig. A) is that the reactive power and hence the power factor may be controlled.

In particular, control is achieved by the AC-DC converters, which can provide power factor correction during the back-to-back AC-DC by: 1. Selection of Circuit Breaker: There are two types of Selection of Circuit Breaker ratings which require the computation of SC current are: (i) rated momentary current and (ii) rated symmetrical interrupting current.

Symmetrical SC current is obtained by using subtransient reactances for synchronous machines. Electric Traction- The system which use electrical power for traction system i.e.

for railways, trams, trolleys, etc. is called electrical traction. OR Electric traction means a locomotion in which the driving force is obtained from electric motors. Electric traction will continue to play a dominant role in the Railway since it is an.

Power is simply the flow of energy and the current demanded by a load is largely uncontrollable. “Power quality” is a convenient term for many; it is the quality of the voltage, rather than power or electric current.

The term is used to describe electric power that drives an. The proceedings collect the latest research trends, methods and experimental results in the field of electrical and information technologies for rail transportation. The topics cover intelligent computing, information processing, communication technology, automatic control, and their applications.

Low voltage direct current (LVDC) distribution has gained the significant interest of research due to the advancements in power conversion technologies. However, the use of converters has given rise to several technical issues regarding their protections and controls of such devices under faulty conditions.

Post-fault behaviour of converter-fed LVDC system involves both active converter Cited by: 2. Power System Analysis by J. Das,Current interruption in AC circuits, and short-circuiting of rotating machines Reactive Power Control Devices Some Examples of Reactive Power Flow Flexible AC Transmission Systems /5(5).

A variable-frequency drive is a device used in a drive system consisting of the following three main sub-systems: AC motor, main drive controller assembly, and drive/operator interface.: – AC motor. The AC electric motor used in a VFD system is usually a three-phase induction types of single-phase motors or synchronous motors can be advantageous in some situations, but.

Highlighting the latest directions in the field, Power System Analysis: Short-Circuit Load Flow and Harmonics, Second Edition includes investigations into arc flash hazard analysis and its migration in electrical systems, as well as wind power generation and its integration into utility : $ Modular Multilevel Converters: Analysis, Control, and Applications is a valuable reference book for academic researchers, practicing engineers, and other professionals in the field of high power converters.

It also serves well as a textbook for graduate-level students. Notching: It is a periodic voltage disturbance caused by the normal operation of power electronic devices, such as AC to DC converters, when current is commutated from one phase to another.

This is shown in Fig. and is present on many consecutive cycles. Download: Download full Author: Shailendra Jain. Electric power transmission is the bulk movement of electrical energy from a generating site, such as a power plant, to an electrical interconnected lines which facilitate this movement are known as a transmission is distinct from the local wiring between high-voltage substations and customers, which is typically referred to as electric power distribution.

ABB circuit-breakers for direct current applications 7 3 Applications Electric traction The particular torque-speed characteristic curve and the ease with which the speed itself can be regulated have led to the use of d.c. motors in the field of electric traction.

Direct File Size: KB. Power System Analysis: Short-Circuit Load Flow and Harmonics J. Das Timely reference combines theoretical and practical aspects of short-circuit currents in ac and dc systems, load flow, and harmonic analysis to provide a sound knowledge base for modern computer-based studies.

Power System Analysis: Short-Circuit Load Flow and Harmonics, Second Edition - CRC Press Book Fundamental to the planning, design, and operating stages of any electrical engineering endeavor, power system analysis continues to be shaped by dramatic advances and improvements that reflect today’s changing energy needs.

• Current summation • Relay actions (27,49,50,51,51V,59,67,79,87) Star - Auto Protection & Coordination • Automated evaluation of zones for overcurrent protection & coordination • Reference Rule Book for evaluation • Automated display of TCC curves & equipment damage curves • Automatic selection of worst case fault locationFile Size: 1MB.

bs en - safety requirements for power electronic converter systems and equipment - part 2: power electronic converters from v a.c. or v d.c. up to 36 kv a.c. or 54 kv d.c.

nfpa selection, care, and maintenance of protective ensembles for technical rescue incidents: api russian: .In a variable frequency power source unit, a series circuit of a contactless semiconductor switching element and a resistor is provided in parallel to a d.c.

smoothing capacitor, and a control circuit is provided for receiving a signal for turning on the switching element selectively at any time after the power source is interrupted, thereby discharging the electric charge on the d.c Cited by: P - IEEE Draft Recommended Practice for Controlled Rectifiers for Traction Power Substation Applications P - Recommended Practice for the Planning and Design of the Microgrid P - IEEE Approved Draft Standard for an Augmented Reality Learning Experience Model.