A Single Switched Capacitor Cell Multilevel Inverter using APOD PWM Technique for Power Grid Application
|International Journal of Engineering Trends and Technology (IJETT)||
|© 2017 by IJETT Journal|
|Year of Publication : 2017|
|Authors : Bhagyalakshmi P S, Beena M Varghese, Dr. Bos Mathew Jos
|DOI : 10.14445/22315381/IJETT-V48P237|
Bhagyalakshmi P S, Beena M Varghese, Dr. Bos Mathew Jos "A Single Switched Capacitor Cell Multilevel Inverter using APOD PWM Technique for Power Grid Application", International Journal of Engineering Trends and Technology (IJETT), V48(4),205-212 June 2017. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group
Multilevel inverter is a power electronic device that is used for high voltage and high power application because of its characteristics of synthesizing a sinusoidal voltage on several DC levels. They give good quality output resulting with lower harmonic distortion in the output. This topology is designed based on Switched Capacitor technique and the number of output levels is determined by the number of Switched Capacitor (SC) cells. Only one DC voltage source is needed and the problem of capacitor voltage balancing is avoided as well. A small input voltage can be used to produce a boosted output voltage, by switching the capacitors in series and in parallel. Number of switching devices used in the circuit is reduced as compared to the conventional cascaded multilevel inverter of same configuration. This work also presents the simulation study of Performance factors such as % THD, voltage stress, ripple voltage etc. using the Alternative Phase Opposition Disposition (APOD) modulation technique. The simulations are done with MATLAB/ SIMULINK software. The control strategy is the key part for the circuit and switching signals are generated with the help of PIC16F877A microcontroller.
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Multilevel Inverter, charge Pump, Switched Capacitor, Grid Application.