Engineering Commons^™

Improved Controller For High Temperature Super Conducting Magnetic Energy Storage (Hts-Smes), Danny Soetanto, M V. Aware

Faculty of Engineering - Papers (Archive)

This paper describes a novel controller for a High Temperature Superconducting Magnetic Energy Storage (HTSSMES) that can ensure (a) fast return of energy to the superconducting coil under constant current mode and (b) a constant and sinusoidal input supply current irrespective of the varying load demand with and without harmonics. A special feature of this controller is its ability to smoothly charge the superconducting coil using constant current charging so that it can be ready for the next discharging operation as soon as possible. Analysis of the circuit operation under hysteresis control is presented in details. Simulation and experimental results …

Development And Performance Analysis Of A Saturated Core High Temperature Superconducting Fault Current Limiter, Jeffrey W. Moscrop, Scott Hopkins

Faculty of Engineering - Papers (Archive)

Recent international activity in the field of high voltage Fault Current Limiters (FCLs) has intensified since the North American blackout of 2003. A number of national and international peak body groups in the USA, Europe and Japan have been established to assess the need for FCLs and the issues associated with their design, specification, operation, protection and integration into the electricity grids. This paper details the development of a prototype 3-phase saturated core High Temperature Superconducting (HTS) FCL in Australia. Through experimental analysis, the performance of this device is characterised in terms of DC saturation, steady state performance, and fault …

Design And Development Of A 3-Phase Saturated Core High Temperature Superconducting Fault Current Limiter, Jeffrey W. Moscrop, Frank Darmann

Faculty of Engineering - Papers (Archive)

The occurrence of fault currents and system sensitivity to fault currents are both increasing in modern power systems. Along with extensive damage to network hardware, considerable consumer losses (due to network unavailability) can result from fault current events. One device that is designed to reduce the impact of fault currents and increase network availability is the fault current limiter (FCL). This paper describes the design and development of a 3-phase saturated core high temperature superconducting (HTS) FCL. This particular type of FCL exhibits negligible power losses during the un-faulted state and also provides instantaneous reaction and recovery during fault events. …

Thermodynamic Modelling Of High Temperature Systems, Winny Wulandari, Geoffrey A. Brooks, M Akbar Rhamdhani, Brian J. Monaghan

Faculty of Engineering - Papers (Archive)

• Thermodynamic modeling is valuable tool to predict phase equilibria in high temperature metals processing
• Thermo chemical packages makes modeling easier, but the fundamental knowledge such as how we determine the phase, species, and activity behaviour are the intellectual aspects
• An example in magnesium impurities illustrate both the predictive power of thermodynamic modelling but also the dilemmas associated with solution behaviour

Packaging Effects On Radfet Sensors For High Energy Physics Experiments, Julien Mekki, Laurent Dusseau, Maurice Glaser, Susanna Guatelli, Michael Moll, Maria Grazia Pia, Federico Ravotti

Faculty of Engineering - Papers (Archive)

RadFETs in customized chip carrier packages are installed in the LHC Experiments as radiation monitors. The package influence on the dose measurement in the complex LHC radiation environment is evaluated using Geant4 simulations and experimental data.

Cyclic Deformation Of Advanced High-Strength Steels: Mechanical Behavior And Microstructural Analysis, Timothy B. Hilditch, Ilana B. Timokhina, Leigh T. Robertson, E V. Pereloma, Peter D. Hodgson

Faculty of Engineering - Papers (Archive)

The fatigue properties of multiphase steels are an important consideration in the automotive industry. The different microstructural phases present in these steels can influence the strain life and cyclic stabilized strength of the material due to the way in which these phases accommodate the applied cyclic strain. Fully reversed strain-controlled low-cycle fatigue tests have been used to determine the mechanical fatigue performance of a dual-phase (DP) 590 and transformation-induced plasticity (TRIP) 780 steel, with transmission electron microscopy (TEM) used to examine the deformed microstructures. It is shown that the higher strain life and cyclic stabilized strength of the TRIP steel …

Thz Generation By Optical Rectification Involving High-Index Planes, Krunal Radhanpura, Stuart Hargreaves, Roger A. Lewis

Faculty of Engineering - Papers (Archive)

We report a theoretical and experimental study of the generation of THz radiation by optical rectification from high-index planes of GaAs crystals.