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Reddy, M. Praveen
- Selective Harmonic Mitigation Technique to Control Power Flow in Cascaded H-Bridge Multilevel Inverter with Non-equal Dc Link Voltages and Energy Storage
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International Journal of Innovative Research and Development, Vol 3, No 9 (2014), Pagination:Abstract
This paper presents a new SHM-PWM technique based on multilevel waveforms which enables the required control of power flow in a CHB converter while fully utilizing the waveform degrees of freedom. The method uses the interpolation of LUT based solutions for a number of imbalances to control the power flow through the H-bridges asymmetrically, thus avoiding the requirement of very large LUTs apparent in previous methods. This paper also focuses on the SHM-PWM control strategy which is capable of meeting grid codes even under non-equal dc link voltages. Theoretical and simulated result is experimentally verified using a five level cascaded H-bridge topology operating as an inverter.