Research On Series-Parallel Compensated UPS With DSP Controller

Nowadays, with the development and prosperity of electronic engineering and industry, more and more attention has been drawn to quality issues of power source. Therefore, it has been popular in the power supply research areas to study how to provide clean and uninterrupted power to electrical power system users. As a novel UPS system, the series-parallel compensated UPS appeared under the trend. Compared with the traditional double-conversion UPS, the series-parallel compensated UPS introduces the brand-new concept, it can be designed of smaller power rating, thus increasing the system efficiency and enhancing the operating reliability.The series-parallel compensated UPS system with DSP controller is studied in this thesis. Firstly, significance of the research in series-parallel compensated UPS is explored, based on the current power quality, along with the development and classification of UPS. Then the system structure and operational principle are described, accordingly, the control strategy is analyzed and designed. The detecting methods of each current component for single phase circuit is thoroughly studied, a detecting method of single phase fundamental active current based on averaging filter is designed. Then the detailed design process for series-parallel compensated UPS with DSP controller is provided. Finally, a PSIM simulation model of series-parallel compensated UPS is built up and the experimental prototype has been developed. The simulation and experimental results validate the performance and rationality of proposed analysis and design.