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Flyback mikroinverterio, sudaryto iš dviejų raktų, modelio Matlab Simulink aplinkoje sudarymas ir tyrimas / Development and research of two switch based Flyback microconverter’s Matlab Simulink model

Abstract

Paper describes simulation results of proposed micro inverter model based on flyback converter with two transistor switches using Matlab Simulink. The aim of this research to investigate behavior of proposed model of the micro inverter based on flyback converter, when micro inverter operates autonomously (islanding) and running parallel in the local electricity network. The simulation of micro inverter’s operation on autonomous mode using nonlinear load was performed, as well as it runs in parallel with the local power network polluted with harmonics. The main goal of these simulations is to observe the response of output current of micro inverter to the harmonical distortions of local grid. Examination of the proposed micro inverter model based on flyback converter in Matlab Simulink environment helps to determinate the resistance of micro inverter output signal to distortion in local electrical grid using two working modes: 1. the autonomous mode using nonlinear load, 2. the parallel mode with local electric grid polluted by higher order harmonics.


Santrauka


Darbe pateikti siūlomo flyback tipo mikroinverterio, sudaryto iš dviejų raktų, modeliavimo rezultatai Matlab Simulink aplinkoje. Tyrimo tikslas – įvertinti siūlomo flyback mikroinverterio modelio veikimą virtualioje Matlab Simulink aplinkoje, kai mikroinverteris veikia autonomiškai (energetinėje saloje) ir lygiagrečiai su vietiniu elektros tinklu. Darbe imituojamas autonomiškas mikroinverterio darbas su netiesiniais elektros tinklo apkrovos elementais ir harmonikomis užterštame elektros tinkle. Taip siekiama įvertinti mikroinverterio tiekiamos į tinklą sinusinės formos srovės reakciją į tinklo įtampos harmoninius iškraipymus. Ištyrus pasiūlyto flyback mikroinverterio eksperimentinį modelį Matlab Simulink aplinkoje, nustatytas mikroinverterio išėjimo signalo atsparumas iškraipymams jam veikiant autonomiškai ir imituojant elektros tinklą, paveiktą aukštesniosiomis eilės harmonikomis.


Reikšminiai žodžiai: flyback keitiklis, mikroinverteris, viršįtampiai, elektros tinklas, PID reguliatorius, harmonikos.

Keyword : flyback converter, microinverter, voltage spikes, electric grid, PID controller, harmonics

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Oct 9, 2018
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