Research On One Cycle Controlled Three-phase High Power Factor Rectifier Technology

The harmonic in the power grid is mainly generated by the various high capacity power converters and other nonlinear loads. The harmonic does damages to the various power equipment such as relay protection equipment,automatic system,computer,measuring and batching instrument and so on. For solving the problems of the high harmonic content and low power factor in the tradition rectifiers, the power factor correction (PFC) technology was proposed to reduce loss,save energy,decrease harmonic pollution and increase the power quality. So studying on the PFC is significant. At present,the single-phase PFC technology is maturing and people are with focus on the three-phase PFC technology gradually.The paper analyzes the operation principle of one cycle control and the existing condition of its application in the PFC technology. The principle of the three-phase standard boost PFC using one cycle control is derived and the model of low frequency and large signal is found. The control-to-output transfer function of the three-phase standard boost PFC by Tellegen's theorem and the small signal model are found. The closed-loop controller is designed and the transfer function is verified by simulation. The stability of the three-phase standard boost PFC is analyzed and the stability condition is derived. The relationship of the switch state and inductor voltage is analyzed to derive the relationships of the main circuit parameter and the inductor current ripple, and the circuit parameters are optimized. The dynamic state of the three-phase standard boost PFC and the stability of the various physical quantities in the perturbation condition are analyzed and the value of the integration time constant is discussed. The experiment circuit is designed in the end.