Effect of lossy substrates on series impedance parameters of interconnects

This study was performed to test bioimpedance as a tool to detect the effect of different thawing methods on meat quality to aid in the eventual creation of an electric impedance-based food quality monitoring system. The electric impedance was measured for fresh pork, thawed pork, and during quick and slow thawing. A clear difference was observed between fresh and thawed samples for both impedance parameters. Impedance was different between the fresh and the frozen-thawed samples, but there were no impedance differences between frozen-thawed samples and the ones that were frozen-thawed and then stored at +3 °C for an additional 16 h after thawing. The phase angle was also different between fresh and the frozen-thawed samples. At high frequency, there were small, but clear phase angle differences between frozen-thawed samples and the samples that were frozen-thawed and subsequently stored for more than 16 h at +3 °C. Furthermore, the deep learning model LSTM-RNN (long short-term memory recurrent neural network) was found to be a promising way to classify the different methods of thawing.

Download Full-text

A Comparison of Time-Domain Implementation Methods for Fractional-Order Battery Impedance Models

Energies ◽

10.3390/en14154415 ◽

2021 ◽

Vol 14 (15) ◽

pp. 4415

Author(s):

Brian Ospina Agudelo ◽

Walter Zamboni ◽

Eric Monmasson

Keyword(s):

Fractional Order ◽

Time Domain ◽

Li Ion Batteries ◽

Simulation Framework ◽

Frequency Range ◽

Interesting Approach ◽

Li Ion ◽

Impedance Parameters ◽

Impedance Models ◽

Made In

This paper is a comparative study of the multiple RC, Oustaloup and Grünwald–Letnikov approaches for time domain implementations of fractional-order battery models. The comparisons are made in terms of accuracy, computational burden and suitability for the identification of impedance parameters from time-domain measurements. The study was performed in a simulation framework and focused on a set of ZARC elements, representing the middle frequency range of Li-ion batteries’ impedance. It was found that the multiple RC approach offers the best accuracy–complexity compromise, making it the most interesting approach for real-time battery simulation applications. As for applications requiring the identification of impedance parameters, the Oustaloup approach offers the best compromise between the goodness of the obtained frequency response and the accuracy–complexity requirements.

Download Full-text

The Field Test of High Voltage Cable Impedance Parameters

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.986-987.1682 ◽

2014 ◽

Vol 986-987 ◽

pp. 1682-1684

Author(s):

Gang Chen ◽

Qing Hao Wang ◽

Guo Bin Liu ◽

Tian Shu Hai ◽

Bo Liu ◽

...

Keyword(s):

Field Test ◽

High Voltage ◽

Single Phase ◽

Measuring Method ◽

Theory Analysis ◽

Zero Sequence ◽

Impedance Parameters

The cables in 66 kV and 220 kV systems are used in single-phase style, and it must be grounded between the cables. The connection ways between different lengths of cables are in different ways, thus, it may occur influence to circuit parameters, especially to zero sequence impedance. In order to clarify the situation from theory analysis to calculate impedance under all kinds of connection modes, the paper gives an actual cable measured value, and introduces the correct measuring method, together, points out the matters needing attention in the measurement.

Download Full-text