Power balance control technique of the modular three-phase ac to dc converter with fast transient response

This paper presents a power balance control technique for a modular three-phase ac to dc converter with nearly unity power-factor and fast transient response. The power balance control technique is used to obtain the three-inductor current compensator, thus, resulting in the output impedance and audio susceptibility become zero, that is, the output voltage of the converter presented in this paper is independent of variations of the dc load current and the source voltage. To improve the dynamic performance, minimal total harmonic distortion in the source current and inductor currents sharing, a proposed control method is employed in the voltage feedback loop. The proposed procedure of analysis is simple and effective. The implementation of this control circuit uses only analog circuitry. Simulation and experimental results are presented to verify the feasibility of the control strategy.

[1]  Henry Shu-Hung Chung,et al.  Paralleling power converters for AC-DC step-down power conversion with inherent power factor correction , 1999 .

[2]  Jian Sun,et al.  Single-stage three-phase power-factor-correction circuit using three isolated single-phase SEPIC converters operating in CCM , 2000, 2000 IEEE 31st Annual Power Electronics Specialists Conference. Conference Proceedings (Cat. No.00CH37018).

[3]  P.N. Enjeti,et al.  Control of multiple single phase PFC modules with a single low-cost DSP , 2003, Eighteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2003. APEC '03..

[4]  F. C. Lee,et al.  Modeling, analysis and design of distributed power systems , 1989, 20th Annual IEEE Power Electronics Specialists Conference.

[5]  Giorgio Spiazzi,et al.  Design criteria for power factor preregulators based on Sepic and Cuk converters in continuous conduction mode , 1994, Proceedings of 1994 IEEE Industry Applications Society Annual Meeting.

[6]  Peng Xu,et al.  Topologies and design considerations for distributed power system applications , 2001, Proc. IEEE.

[7]  S.H. Li,et al.  Development of three-phase switch-mode rectifier using single-phase modules , 2004, IEEE Transactions on Aerospace and Electronic Systems.

[8]  S. Hui,et al.  Characterization of single-stage three-phase power-factor-correction circuit using modular single-phase PWM DC-to-DC converters , 2000 .

[9]  Sung-Pei Yang,et al.  Small-signal analysis and controller design for an isolated zeta converter with high power factor correction , 2005 .