June 22, 2003
June 22, 2003
June 25, 2003
8.628.1 - 8.628.8
Harmonic Analysis of three phase PWM inverter systems using MATLAB
Wajiha Shireen and Rahul A. Kulkarni University of Houston.
Abstract: In this paper analysis of a three phase PWM inverter system, with harmonic assessment of the inverter input current and output voltage with balanced and unbalanced loads is presented. The analytical procedure and the simulation results presented show how MATLAB can be used as an effective tool to analyze a PWM inverter. Advantages of using MATLAB are: faster response, availability of various simulation tools and functional blocks and the absence of convergence problems. The analytical procedure and simulation outlined in this paper can be used as an educational tool to make the concepts of modern power conversion schemes comprehensible to students.
Pulse Width Modulated (PWM) inverter systems are used in a wide variety of applications as a front-end power-conditioning unit. Applications of PWM inverter systems include: electric drives, uninterruptible power supplies, high voltage DC transmission, active power filters and reactive power compensators in power systems, electric vehicles, alternate energy systems, industrial processes, etc. Inverters realize dc-to-ac power conversion and in the most commonly used voltage source inverter configuration, the dc-input voltage can be obtained from a diode rectifier or from another dc source such as battery. A typical voltage source PWM inverter system consists of rectifier, DC-link, PWM inverter along with associated control circuitry and the load. Most modern voltage-source inverters are controlled using wide variety of pulse width modulation (PWM) schemes, to obtain output ac voltages of the desired magnitude and frequency shaped as closely as possible to a sine wave.
Analysis of PWM inverter systems is required to determine the input-output characteristics for an application specific design, which is used in the development and implementation of the appropriate control algorithm. In addition to time domain analysis, harmonic assessment is an integral part of analysis and simulation of any power conversion system. Several powerful computer simulation tools such as PSPICE, SABER and MATLAB, are available that can be effectively used and analyze and design PWM inverter systems. Advantages of using MATLAB are: faster response, availability of various simulation tools and functional blocks that makes the simulation process simpler and it does not suffer from convergence problem as in the case of other software tools.
“Proceedings of the 2003 American Society for Engineering Education Annual Conference & Exposition, Copy Right © 2003, American Society for Engineering Education”
Kulkarni, R., & Shireen, W. (2003, June), Harmonic Analysis Of Three Phase Pwm Inverter Systems Using Matlab Paper presented at 2003 Annual Conference, Nashville, Tennessee. https://peer.asee.org/11895
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