Research Of High Power Factor Rectifier

Recently, harmonic pollution has been gradually serious to power system due toincreasing application of power electronic equipments. Consequently, harmonicdisturbance has been one of the main difficult questions. This paper, adopting oneactive method, analyzes three-phase PWM reversible rectifier after making deeplyresearch. The system can achieve good input performance, upper power factor andbidirectional energy flow.After classifying and summarizing the PWM, the article, based on profounddiscussion, establishes various models made in ABC, α β and dq coordinates, forrectifier by space vector PWM. It also makes one equivalent structure for the rectifierand designs a voltage-current closed loop. At the same time, the paper, by the help ofsimulation system, makes particular compares in the voltage and current curvesbetween adapting the common method and the new way. Good excitation control systems not only play an important role in the stabilityof power system but also can improve the performance of generators and powersystem. This dissertation applies the high power factor rectifier to the generatorexcitation system. Unlike controllable silicon system, it can obtain low harmoniccontents in the voltage and current, and decrease the additional wastage and additionaltemperature change.Finally, the thesis, according to the laboratory condition, analyses thecontrollable circuit, drivable circuit via 80C196MC single chip,and presents someadvertent questions.