Comparative Study of THD in 5-level Neutral Point Clamped Multilevel Converter Using Multicarrier PWM and SHEPWM Techniques
نویسندگان
چکیده
A multilevel inverter is a power electronic device made to synthesize a desired AC voltage from several levels of DC voltages. Some industrial drives require medium voltage and megawatt power level. For a medium voltage grid, it is troublesome to connect only one power semiconductor switch directly. A multilevel power converter structure has been introduced as an alternative in high power and medium voltage situations. In this paper career based phase disposition PDPWM, PODPWM, APODPWM and SHEPWM have been analyzed. The PWM control strategy method is used for multilevel inverter to reduce the THD in the output waveform. The simulation is done by Matlab/Simulink environment.
منابع مشابه
Comparative Study of Multicarrier PWM Techniques for a Modular Multilevel Inverter
Abstract— This paper presents the simulation of three phase five-level modular multilevel cascade inverter based on double-star chopper-cell (DSCC). The multicarrier PWM techniques such as Phase disposition PWM (PDPWM), Phase opposition disposition PWM (PODPWM), Alternate phase opposition disposition PWM (APODPWM), and Phase shift PWM (PSPWM) is employed and a comparative study is done based on...
متن کاملSimulation and Comparison of Twenty Five Level Diode Clamped & Cascaded H-Bridge Multilevel Inverter
This paper presents the comparative study of three phase twenty five level diode clamped and cascaded H-bridge multilevel inverters. The comparison is made in respect of requirement of devices, quality of output voltage and reduction of total harmonic distortion at the multilevel inverter terminals. In this work multicarrier sinusoidal pulse modulation control methods of Phase disposition (PD-P...
متن کاملDesign and Performance Analysis of 7-Level Diode Clamped Multilevel Inverter Using Modified Space Vector Pulse Width Modulation Techniques
In this paper, a 7-level Diode Clamped Multilevel Inverter (DCMLI) is simulated with three different carrier PWM techniques. Here, Carrier based Sinusoidal Pulse Width Modulation (SPWM), Third Harmonic Injected Pulse Width Modulation (THIPWM) and Modified Carrier-Based Space Vector Pulse Width Modulation (SVPWM) are used as modulation strategies. These modulation strategies include Phase Dispos...
متن کاملComparative Study on Various Unipolar PWM Strategies for Trinary DC source Multilevel Inverter
The need for high power apparatus in industry has increased in recent years. Multilevel inverters have developed as easy alternatives for such power requirements. Multilevel inverters consist of a group of semiconductor switches and a set of voltage source components like capacitors or independent sources. The basic concept of these inverters depends on using this series of switches and sources...
متن کاملHarmonic Evaluation of Multicarrier Pwm Techniques for Cascaded Multilevel Inverter
Multilevel voltage source inverter has been recognized as an important alternative to the normal two level voltage source inverter, especially in high power application. Using multilevel technique, the output voltage amplitude is increased, switching devices stress is reduced and the overall harmonics profile is improved. Three presentable topologies can b considered for multilevel inverter (ML...
متن کامل