A Single-Phase High-Power-Factor Neutral-pointer Clamped Multilevel Rectifier

A single-phase rectifier based on neutral-clamped converter (NPC) is proposed to achieve high power factor, lower current distortion and low voltage stress of power semiconductors. The principle of single-phase three-level PWM rectifier is introduced. Neutral-point balance problem is an inherent problem of three-level converter, so a bangbang control method is schemed to control the capacities' voltage. A dual close-loop control is used to make the rectifier have favorable dynamic and steady state performance, sinusoidal input current and unity power factor. Finally, the feasibility and validity of the proposed control scheme and neutral-point voltage control scheme are verified through the simulation using MATLAB.

[1]  J. Sebastian,et al.  An overview of power factor correction in single-phase off-line power supply systems , 1994, Proceedings of IECON'94 - 20th Annual Conference of IEEE Industrial Electronics.

[2]  Fang Zheng Peng,et al.  Multilevel converters-a new breed of power converters , 1995, IAS '95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting.

[3]  Dushan Boroyevich,et al.  High performance three-phase power factor correction circuits , 1995, Proceedings of IECON '95 - 21st Annual Conference on IEEE Industrial Electronics.

[4]  Dushan Boroyevich,et al.  Review of high-performance three-phase power-factor correction circuits , 1997, IEEE Trans. Ind. Electron..

[5]  G. Sciutto,et al.  A new multilevel PWM method: a theoretical analysis , 1990, 21st Annual IEEE Conference on Power Electronics Specialists.

[6]  Hirofumi Akagi,et al.  A New Neutral-Point-Clamped PWM Inverter , 1981, IEEE Transactions on Industry Applications.

[7]  Nikola Celanovic,et al.  Space Vector Modulation and Control of Multilevel Converters , 2000 .

[8]  José R. Espinoza,et al.  PWM regenerative rectifiers: state of the art , 2005, IEEE Transactions on Industrial Electronics.

[9]  Kamal Al-Haddad,et al.  Analysis and design of single-controlled switch three-phase rectifier with unity power factor and sinusoidal input current , 1997 .