Small-signal modeling and fast response control strategy for DCVM C&amp;#x00FA;k converters in PFC applications

Nasirian, Vahidreza; Karimi, Yaser; Zolghadri, Mohammad Reza; Ahmadian, M.; Moayedi, Ali; Davoudi, Ali

doi:10.1109/apec.2011.5744840

Cited by 2 publications

(1 citation statement)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Small-signal model is widely used to analyse the stability such as grid-tied inverter system, the stable operation of microgrids, the negative incremental resistor behaviour, the design of PFC regulator and so on. Though there are some precision errors, the method that the non-linear characteristics is simplified to linear characteristics at a certain stable operating point will simplify the calculation, meanwhile, the stable range can be determined [26][27][28][29]. Therefore, this paper combines the small-signal model technique and the method of making the cascade converter equivalent to a CPL to analyse the physical mechanism and underlying causes of the slow-scale bifurcation of the PFC cascade converters.…”

Section: Research Articlementioning

confidence: 99%

Research on slow‐scale bifurcation phenomenon of PFC cascade converter

Zhang

Wang

et al. 2016

IET Power Electronics

View full text Add to dashboard Cite

This study reports a new slow-scale bifurcation phenomenon in linear frequency of power factor correction (PFC) cascade converters, which will offer a useful design reference for PFC power application. Compared with the resistive loads analysed before, the stability of PFC cascade converters is studied, which are more complex but practical. This study has introduced the research method that the secondary efficient point-of-load converter can be equivalent to a constant power load. Based on this method, the small-signal model of the whole system is constructed and the characteristic equations are thus derived. Subsequently, the stable boundary is determined when the coefficients of the characteristic equations are positive according to Routh-Hurwitz stability criterion. Furthermore, the time-domain waveforms and phase portraits between the output voltage and the inductor current are given according to numerical simulation and experimental results at different points. Meanwhile, the total harmonic distortion and the fast Fourier transform diagrams are compared to reveal the influence of the bifurcation phenomenon on power quality of the system. The results provide useful information of parameter space for the design and operation of the converter in the desired fundamental stable regime.

show abstract

Section: Research Articlementioning

confidence: 99%