Extraction of causal RLGC models from measurements for signal link path analysis

2017

RADIOENGINEERING

Section: Measurements and Estimation Of Model Parametersmentioning

confidence: 93%

“…Additionally, line parameters extraction is made with some optimization algorithms such as genetic algorithm etc. [18][19][20].…”

mentioning

confidence: 99%

Modeling and Link Performance Analysis of Busbar Distribution Systems for Narrowband PLC

Hasirci¹,

Çavdar²,

2017

RADIOENGINEERING

“…This paper uses a frequency-dependent RLGC(f) modeling approach for distributed parameter extraction from measured S-parameters. The results are more accurate and efficient in a broad frequency range because they eliminate discontinuities caused by hyperbolic functions [20][21][22]. Additionally, the limitations of the conventional methods such as specific line lengths, frequencies, and the number of lines, among others, will be ameliorated.…”

Section: Modeling and Parameter Optimizationmentioning

confidence: 99%

“…Other methods estimate Z c from γ extracted from measurements with certain assumptions. Additionally, line parameter extraction is performed using optimization algorithms, including genetic algorithms [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

RLGC(f) modeling of a busbar distribution system via measured S-parameters at CENELEC and FCC bands

Hasirci¹,

Çavdar²,

Turk J Elec Eng & Comp Sci

2018

This paper addresses the extraction of accurate frequency-dependent per-unit-length RLGC parameters for busbar distribution systems using measured S-parameters for the CENELEC and FCC bands. A busbar is a distribution system element (three phase, low voltage) with a modular structure that carries electrical energy in buildings. The S-parameters of a busbar distribution system at different current levels (630 A, 1250 A, 2000 A) are measured with a vector network analyzer and then analyzed for three different two-port connections (L1-N, L2-N, L3-N). A frequencydependent RLGC(f) model is used to characterize the busbar as a transmission line using a derivative-free optimization algorithm. A time-domain causality check is also conducted. Estimated RLGC parameters are presented along with characteristic impedance and propagation constant. Good agreement has been achieved between measured and estimated S-parameters.

“…These studies use an optimization algorithm to find the parameters instead of calculating them directly. The results are more accurate and efficient in a large frequency band since they eliminate the discontinuity caused by the hyperbolic functions [17][18][19][20][21][22][23]. On the other hand, these modeling studies are important in terms of ensuring the causality requirements.…”

Section: Introductionmentioning

confidence: 99%

Applicability Comparison of Transmission Line Parameter Extraction Methods for Busbar Distribution Systems

Hasirci¹,

Çavdar²,

Journal of Electrical Engineering and Technology

2017

-Modeling busbar distribution system as a transmission line is an important subject of power line communication in the smart grid concept. This requires extraction of busbar RLGC parameters, accurately. In this study, a comparison is made between conventional and modified method for the aspect of optimum RLGC parameters extraction in the 1 MHz to 50 MHz frequency band. The usefulness of these methods is shown both in time and frequency-domain analysis. The frequency-domain analyzes show that the inherent power of modified method can eliminate the errors especially due to the discontinuities arise in conventional method. This makes the modeling approach of modified method more advantageous for the busbars due to its robustness against disturbances in the S-parameters measurements which cannot be eliminated with the calibration procedure. On the other hand, time-domain simulations show that the transmission line representation of the modified method is closer to physical reality by handling causality issues.