Sökning: "Interharmonics"

Hittade 4 uppsatser innehållade ordet Interharmonics.

  1. 1. Conductive interferences from multiple EC-motor installation : To measure and mitigate harmonics

    Uppsats för yrkesexamina på grundnivå, Uppsala universitet/Signaler och system

    Författare :Victor Aitman; [2022]
    Nyckelord :harmonics; interharmonics; harmonic-mitigation; electromagnetic compability; EMC; övertoner; EC-motorer; störningar; övertonsreducering; elektromagnetiskt kompabilitet; EMC;

    Sammanfattning : Products produced by a Swedish company are requested to be investigated regarding their harmonic and inter-harmonic currents injected into the public supply system to comply with the Swedish standard SS-EN IEC 61000-3-2, Electromagnetic compatibility (EMC).    On behalf of Systemair Sweden AB, this bachelor thesis aims firstly to investigate if their product, PAFEC 4225 WH (Air Curtain), complies with standard SS-EN IEC 61000-3-2, and if not, what measures should be taken; and secondly to develop a low-cost instrument for the measurement of harmonics and inter-harmonics according to standard IEC 61000-4-7 related to the requirements on equipment used in standard SS-EN IEC 61000-3-2. LÄS MER

  3. 2. Interharmonic Analysis of Sustainable Energy Sources and Loads : Comparing two signal processing methods for estimation of interharmonics

    Kandidat-uppsats, Högskolan Dalarna/Energiteknik

    Författare :Isabelle Löfgren; [2020]
    Nyckelord :interharmonics; short time Fourier transform; desynchronized processing technique; sliding-window ESPRIT; power quality; signal processing;

    Sammanfattning : In this report, studies on interharmonics from three different measurement sites are performed. The first site is a wind park with three turbines, where the measurements are performed at the point of common coupling of these three. LÄS MER

  4. 3. Electric power quality in low voltage grid : Office buildings and rural substation

    Magister-uppsats, Högskolan i Halmstad/Sektionen för ekonomi och teknik (SET)

    Författare :Robin Andersson; [2015]
    Nyckelord :power quality; low voltage; office building; EIFS 2013:1; measurements; reactive power; capacitive power factor; substation;

    Sammanfattning : The modern society uses more and more electronic devices needed to being able to function together. This put higher demands on the electrical grid together with that the typical load have changed from the past. Therefore utility companies are obliged to keep the voltage within certain limits for this to function. LÄS MER

  5. 4. Power Quality Analysis of a 110 MW Wind Farm in a 130 kV Switchyard

    Uppsats för yrkesexamina på avancerad nivå, Institutionen för teknikvetenskaper

    Författare :My Näslund; [2012]
    Nyckelord :Power Quality; Flicker; Interharmonics; Harmonics; Unbalance; Wind Power; Elkvalitet; Flimmer; Obalans; Mellantoner; Övertoner; Vindkraft;

    Sammanfattning : Good power quality is not only determined by uninterruptable power supply, voltage deviations also affect the function of the network and the equipment connected. Electromagnetic disturbances as flicker, harmonics, interharmonics and unbalance are decreasing the power quality. LÄS MER