Volume 20 No 20 (2022)
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AC/AC Modular Multilevel Converter Using HF Transformer Based on PSO Optimized PI Control Strategy
Kadaverugu Sai Teja , Dr. P. Nagaraju Mandadi , Dr. T. Anil Kumar
Abstract
The primary objective of this research is to develop a high-frequency (HF)-based AC-to-AC modular multilevel converter employing Particle Swarm Optimization (PSO) as the PI control strategy. Additionally, the proposed converter has the benefits of being modular, producing a sinusoidal voltage waveform, producing a lot of power, and not requiring any kind of circulating current. The power electronic transformer, FFPT, and wind power generation are just a few examples of highvoltage, high-power applications that might benefit greatly from this converter. The proposed converter architecture allows for the series connection of two asynchronous three-phase AC systems of different frequency and amplitude. Instead of using a sophisticated and expensive industrial frequency transformer, the HF transformer may be used to serially connect input and output modules. Since electrical isolation is crucial for the realization of the HF fundamental wave, the inverter side output pulse must be inverted. The high-frequency transformer amplifies the pulse before the cycloconverter converts it back to a low-frequency output wave. We go into great detail discussing our modulation technique, PSO-based PI control mechanism, and default parameter design. Furthermore, results from simulations confirm the viability of the proposed converter
Keywords
Modular Multilevel Converter (MMC), Particle Swarm Optimization (PSO), High Frequency (HF) transformer
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