Essays about: "harmonic distortion"

Showing result 11 - 15 of 38 essays containing the words harmonic distortion.

  1. 11. Control, Design, and Implementation of Quasi Z-source Cascaded H-Bridge Inverter

    University essay from Linköpings universitet/Elektroniska Kretsar och System

    Author : Fares Al-Egli; Hassan Mohamed Moumin; [2018]
    Keywords : Quasi Z-Source Inverter; QZSI; Multi-Level Inverter; Single-Phase; Cascaded H-Bridge; PS-PWM;

    Abstract : This report is about control, design and implementation of a low voltage-fed quasi Z-source three-level inverter. The topology has been interesting for photovoltaic-systems due to its ability to boost the incoming voltage without needing an extra switching control. READ MORE

  3. 12. Evaluation of power quality and common design concept for AC-DC converters in aircraft

    University essay from

    Author : Andreas Brolund; [2017]
    Keywords : AC-DC; converter; aircraft; power electronics; MOSFET; MEA; More electric aircraft; Delta-switch; ATRU; Auto-transformer rectifier unit; Auto-transformer; Vienna rectifier; passive rectifier; active rectifier; power factor correction; APFC; PFC; MATLAB; Simulink; THD; total harmonic distortion;

    Abstract : This master thesis has been carried out in collaboration with Saab, Avionics Systems in Jönköping, Sweden, during the spring of 2017. The thesis investigates unidirectional rectifier topologies in aircraft and the focus has been on evaluating the power quality requirements according to the aircraft standards, in the course of the More Electric Aircraft concept. READ MORE

  4. 13. New Topology for STATCOM

    University essay from KTH/Elkraftteknik

    Author : Marta Ibáñez Sánchez; [2017]
    Keywords : STATCOM; Modular Multilevel Converter; Chain-Link; negative sequence capability; common dc-link; bi-directional switches;

    Abstract : Static compensators (STATCOM) based on high-power converters are widely used for utilitiesand industrial applications in order to enhance the power system reliability. Nowadays,the Chain-Link Modular Multilevel Converter is the best solution for such applications,providing high eciency and reliability, and good harmonic performance. READ MORE

  5. 14. Automatic acoustic tests of conference phones

    University essay from Uppsala universitet/Fasta tillståndets elektronik

    Author : Carl Christian Kirchmann; [2017]
    Keywords : Acoustics; Digital signal processing; total harmonic distortion; reverberation;

    Abstract : This master thesis was completed at Limes Audio in Umeå. Limes Audio are specialized in speech enhancement software which is mostly used in conference phones. Their software is used to reduce noise, echo cancellation as well as reduction of distortion. READ MORE

  6. 15. Impact Study: Photo-voltaic Distributed Generation on Power System

    University essay from Mälardalens högskola/Akademin för ekonomi, samhälle och teknik

    Author : Smrutirekha Sahoo; [2016]
    Keywords : DC-AC inverter; DC-DC boost converter; Dynamic PV model; Grid-connected PV system; Harmonic distortion; LV grid-modelling; Overvoltage; THD; Voltage unbalancing; VSI;

    Abstract : The grid-connected photo-voltaic (PV) system is one of the most promising renewable energy solutions which offers many benefits to both the end user and the utility network and thus it has gained the popularity over the last few decades. However, due to the very nature of its invariability and weather dependencies, the large scale integration of this type of distributed generation has created challenges for the network operator while maintaining the quality of the power supply and also for reliable and safe operations of the grids. READ MORE