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Showing 1 to 20 of 26 for “"line parameters"”.
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Numerical methods for frequency dependent line parameters with applications to microstrip lines and pipe-type cables
Signal lines such as microstrip lines have recently assumed increased importance in VLSI circuit design and computer package design. Their behavior has become a key factor in system performance. As the circuit implementation size or area reduces almost to its physical limits, the circuit speed is …
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A New Method of Determining the Transmission Line Parameters of an Untransposed Line using Synchrophasor Measurements
Transmission line parameters play a significant role in a variety of power system applications. The accuracy of these parameters is of paramount importance. Traditional methods of determining transmission line parameters must take a large number of factors into consideration. It is difficult and in …
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Synchronized Phasor Measurement Units Applications in Three-phase Power System
… through either direct measurements or simple linear calculations. With the growing number of PMUs installed or planned to be installed in the near future, both utilities and research institutions are looking for novel applications of synchrophasor measurements from these widely installed PMUs. …
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Input impedance of a slot-cylinder antenna
… an axial slot. It is excited by a parallel-wire line connected across the center of the slot. This causes standing waves along the slot. The analysis is then based on an analogy between the slot and a transmission line. Following this analogy equations for the transmission-line parameters are …
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Alternatives to the gradient in optimal transfer line buffer allocation
… We find that the new algorithms work better in lines with no bottlenecks. The variance and standard deviation algorithms work very well in most cases. We also include an algorithm to generate realistic line parameters. This algorithm generate realistic line parameters based on realistic …
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Transmission Lines For Ir Signal Routing
… and characterization of coplanar striplines, vias, and microstrip lines is investigated, from the point of view of developing interconnections for antenna-coupled infrared detectors operating in the 8- to 12-micron wavelength range. To our knowledge, no previous efforts have been made …
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Transient analysis of lossy multiconductor transmission lines in nonlinear circuits
Using the frequency-dependent transmission line parameters, two time-domain models are developed for lossy multiconductor transmissions lines. It is shown that the endpoints of a lossy multiconductor line can be represented at each time step by discretized Thevenin or Norton equivalent circuits. …
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Numerical Modeling of Multi-Conductor Interconnects for High Speed Integrated Circuits
… methodology to the development of transmission line models for multi-conductor interconnects in high speed integrated circuits. The methodology starts with the assumption that per unit length (p.u.l.) transmission line parameters — i.e. p.u.l. resistance R, inductance L, capacitance C, and …
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Fault location on EHV lines using wideband spread spectrum techniques
… well in high noise environments such as power lines and their use in radar ranging is well known. Existing power line carrier (PLC) equipment may be used to transmit a direct sequence signal down a faulted EHV line. The fault position may then be calculated from correlation analysis of the …
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An Iterative Technique for Instrument Transformer Calibration and Line Parameter Estimation with Synchrophasor Measurements
… transformer calibration and transmission line parameter estimation have been examined. With synchrophasors offering real-time data for analysis, a solution to each individual problem seems feasible. A quandary however arises due to the fact that calibration methods depend on accurate …
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H107[alpha] recombination-line emission, 4800-MHz and 1666-MHz continuum emission in the HII region RCW38
… from observations of H107[alpha] recombination-line emission and the related 4800 MHz continuum emission of the HII region RCW 38 using the Australia Telescope Compact Array. We find the continuum emission to be concentrated in a ring-like structure with the 05 star, IRS2, approximately centered …
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Time domain synthesis applied to modeling of microwave structures and material characterization
… and the complex permeability in a stripline geometry is presented. The new technique uses both Time Domain Reflectometry (TDR) and Time Domain Transmission (TDT) measurements for determining an optimum frequency dependent lossy transmission line model for the stripline under test. The …
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Characterization and modeling of multilayer interconnections for high-speed digital systems
… for both single and coupled lossy transmission lines are obtained. Such transmission line parameters can be used in specialized circuit simulators to accurately characterize the lossy metal interconnections used in high speed and high frequency circuits. Effects of the frequency-dependent metal …
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Renewable Energy Integrated Power System Stability Assessment with Validated System Model Based on PMU Measurements
… system model by estimating the transmission line parameters in the system with PMU measurements. The system transient stability assessment is conducted based on this validated model. The constrained stability region is estimated with Lyapunov functions family based method in the center of …
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Islanded Operation of Parallel Inverter-interfaced Microgrids with Photovoltaic Systems
… generators according to their power ratings. A linearized model of microgrids is used to evaluate the change in powers (real-reactive) of the distributed generators due to the load change, but it is noticed that the linearized modeling of microgrids depends on the distribution line parameters. …
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Superconducting coplanar delay lines
Two 25 ns wideband HTS delay lines with a novel double-spiral meander line (DSML) structure are designed, fabricated and measured. One is based on the conventional coplanar waveguide (CPW), and the other based on a conductor-backed coplanar waveguide (CBCPW). Systematic design work is presented in …
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Molecular Spectroscopy: A Study of Molecules in Earth and Planetary Atmospheres
… a major contributor.</p> <p>Vibration-rotation line lists for AlF, Al<sup>35</sup>Cl and Al<sup>37</sup>Cl have been prepared in their ground electronic states (X<sup>1</sup>Σ+). Experimental rotational and ro-vibrational lines were employed to calculate a potential energy surface (PES) by …
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Frequency dependent impedance of stranded conductors using the subdivision method
… of stranded conductors in transmission lines has not been thoroughly investigated for a wide frequency range of DCto 10 MHz. The main objective of this thesis project has been to write a computer program that calculates the resistance and inductance of stranded conductors in the …
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Algorithms and Performance Analysis for Synchrophasor and Grid State Estimation
… of synchrophasor and from the definition of the parameters to evaluate PMU performances, useful guidelines to design a filter-based synchrophasor estimator are provided. Afterwards, an extensive performance comparison of some state-of-the-art synchrophasor estimation algorithms is reported in …
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Energy modelling in the South African electric power industry
… growth relationship: Two major calculations, linear programming optimisation and loss of load probability analysis, are used in the computer models which aid the policy makers in selecting the optimum size and mix of the generating plants and scheduling the operation and maintenance of the …
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