Electrical power quality indices estimation during severe signal distortions in medium voltage networks

V. Terzija, V. Stanojevic, W. Rebizant

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In the paper the application of nonlinear and non-recursive Newton Type Estimation Numerical Algorithm for voltage and current spectra estimation during off-nominal frequency condition and severe signal distortions is presented. The algorithm is not sensitive to power system frequency changes and voltage and current amplitude distortions. It is an important improvement with regard to the commonly utilized approaches based on e.g. Discrete Fourier Transform, or other approaches derived in spectral domain. The unknown frequency is simultaneously measured (estimated) with the spectrum of the input signal. The algorithm is tested using voltages and currents obtained from the ATP-EMTP simulation program, using Simulink model and in laboratory conditions. In the first test, a typical MV network example is used. By this, a motor start and a short circuit followed with the current transformers saturation transients are particularly analyzed. The purpose of Simulink test is to compare the NTA algorithm with FFT. Laboratory test consists of connecting a synchronous generator to the network, when synchronization is not ideal and severe disturbance of generator currents and voltages occur.

Original languageEnglish
Title of host publicationTransmission and Distribution Exposition Conference
Subtitle of host publication2008 IEEE PES Powering Toward the Future, PIMS 2008
DOIs
Publication statusPublished - 2008
Externally publishedYes
EventTransmission and Distribution Exposition Conference: 2008 IEEE PES Powering Toward the Future, PIMS 2008 - Chicago, IL, United States
Duration: 21 Apr 200824 Apr 2008

Publication series

NameTransmission and Distribution Exposition Conference: 2008 IEEE PES Powering Toward the Future, PIMS 2008

Conference

ConferenceTransmission and Distribution Exposition Conference: 2008 IEEE PES Powering Toward the Future, PIMS 2008
Country/TerritoryUnited States
CityChicago, IL
Period21/04/0824/04/08

Keywords

  • ATP-EMTP simulations
  • Newton type estimation algorithm
  • Nonlinear estimation
  • Power quality

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