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- 저자 : Jiayi Kong (검색결과 2 건)
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Jiayi Kong 전력전자학회 2023 JOURNAL OF POWER ELECTRONICS Vol.23 No.8
In this paper, taking into account the unidirectional conduction property of diodes, with an emphasis on the enhancement of system tolerance and robustness, a modifi ed passivity-based control (PBC) method is introduced to three-phase cascaded unidirectional multilevel converters. This is the first time the PBC method has been utilized in cascaded unidirectional multilevel converters. This paper applies the PBC method to the current control loop and the overall DC bus voltage control loop. Meanwhile, considering that the classical PBC method regulates DC voltage with a steady-state error, the overall DC bus voltage is regulated via a combination of the PBC method and a PI controller to ensure zero-voltage tracking error. Moreover, the tolerance and robustness of the modified PBC method are verified by a theoretical analysis. Simulation results are furnished for assessing the correctness of the theoretical analysis, and the performance of the modified PBC method for three-phase cascaded unidirectional multilevel converters.
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Novel high‑power triple line‑voltage cascaded unity power factor rectifier
Cong Wang,Xia Liu,Zhuang Li,Hong Cheng,Ting Chen,Jiayi Kong 전력전자학회 2023 JOURNAL OF POWER ELECTRONICS Vol.23 No.1
A novel high-power triple line-voltage cascaded three-phase unity power factor rectifier is proposed to address the complex topology and control of the three-phase rectifier stage in traditional high-power charging power supply modules. The topology is composed of three line-voltage cascaded traditional three-phase single-switch boost-type voltage rectifier modules. With the triple line-voltage cascaded structure, in the proposed topology, the number of the fully controlled power switches and the voltage stresses of each power switch are both effectively reduced. In addition, the proposed rectifier topology can operate at a unity power factor with a sinusoidal input current. In this paper, the circuit structure and the operation principle including the DC-link voltages output characteristics of the proposed topology are described, and a corresponding system control strategy based on one cycle control (OCC) is presented. Simulation and experimental results are given which verified the feasibility of the proposed topology and control strategy.
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