The Behavior of Capacitance Component of Loads in Frequency Range 2-150 kHz (Supra-Harmonic)

Javad Behkesh Noshahr, Mostafa Kermani, Mehdi Bagheri

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Harmonic emission in range of 2-50 kHz (Supra-Harmonic) is a new threat to the operation of power grids which can result in capacitors failure, interruption in telecommunication systems, network automation, wireless communications and increased error in measurement equipment. Increase in capacitive behavior and decrease in load impedance will make high frequency flow from nonlinear loads to load capacitance component of the network. In terms of harmonics production resources, the capacitance component is parallel to short-circuit impedance of the network (X/R)). Depending on short-circuit impedance of the network (X/R), the function of load capacitance component can be low-pass or intermediate filter. In this paper, it is tried to investigate the effect of increase in loads capacitance component of network on high frequency oscillation rate (2-150 kHz) due to switching of full power converter. The static converter used in this simulation is a two-level back-to-back converter (6 pulses) and a 2000-Hz full-power converter's switching frequency. The load capacitance component of network is considered at three levels of low capacitor (1kVar), medium capacitor (2.5kVar) and high capacitor (5kVar). The harmonic and spectrogram STFT analysis of network's currents, resistance- inductance capacitance component with sampling time (Sample time = 50 microseconds) has been performed in Matlab. The results indicate that in low capacitance components, the system acts as an intermediate pass filter (9-10 kHz). In medium capacitance component, the system operates in the form of high cutoff intermediate pass filter (6-7 kHz). The behavior of system in the high capacitance component is as an intermediate pass filter of cut-off frequency 4-5 kHz. The results show that by increase in the load capacitance capacity, although the number of high frequency harmonic components has decreased, the size of the high-frequency harmonics released to the network and the load resistance- inductance component have increased.

Original languageEnglish
Title of host publicationProceedings - 2019 IEEE International Conference on Environment and Electrical Engineering and 2019 IEEE Industrial and Commercial Power Systems Europe, EEEIC/I and CPS Europe 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728106526
DOIs
Publication statusPublished - Jun 2019
Event19th IEEE International Conference on Environment and Electrical Engineering and 2019 IEEE Industrial and Commercial Power Systems Europe, EEEIC/I and CPS Europe 2019 - Genoa, Italy
Duration: Jun 11 2019Jun 14 2019

Publication series

NameProceedings - 2019 IEEE International Conference on Environment and Electrical Engineering and 2019 IEEE Industrial and Commercial Power Systems Europe, EEEIC/I and CPS Europe 2019

Conference

Conference19th IEEE International Conference on Environment and Electrical Engineering and 2019 IEEE Industrial and Commercial Power Systems Europe, EEEIC/I and CPS Europe 2019
CountryItaly
CityGenoa
Period6/11/196/14/19

Keywords

  • capacitance component
  • high-frequency harmonics
  • short-circuit impedance
  • spectrogram STFT analysis
  • switching frequency

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Electrical and Electronic Engineering
  • Industrial and Manufacturing Engineering
  • Environmental Engineering
  • Control and Optimization

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  • Cite this

    Noshahr, J. B., Kermani, M., & Bagheri, M. (2019). The Behavior of Capacitance Component of Loads in Frequency Range 2-150 kHz (Supra-Harmonic). In Proceedings - 2019 IEEE International Conference on Environment and Electrical Engineering and 2019 IEEE Industrial and Commercial Power Systems Europe, EEEIC/I and CPS Europe 2019 [8783605] (Proceedings - 2019 IEEE International Conference on Environment and Electrical Engineering and 2019 IEEE Industrial and Commercial Power Systems Europe, EEEIC/I and CPS Europe 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/EEEIC.2019.8783605