DC Bus Voltage Stabilization for Cascaded Power Converter by Integrating an Extra Port into Load Side PSFB

You, Jian Wei; Fan, Weiyan; Liao, Mengyan

doi:10.23919/ipec.2018.8507838

Cited by 1 publication

(2 citation statements)

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“…The proposed power converter behaves like a semi-isolated three-port converter (as denoted in Fig. 1) which is similar to the idea with isolated topology proposed in [22]. Compared to existing standalone bus voltage conditioners that require additional switching components and control systems, the proposed integrated scheme has smaller size, lower cost and less power losses.…”

Section: Introductionmentioning

confidence: 89%

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Virtual Resistor-Based Integrated DC Bus Voltage Conditioner for Stability Improvement of Cascaded Power Converters

et al. 2019

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A bidirectional integrated bus voltage conditioner (IBVC) for an isolated phase-shifted full bridge (PSFB) dc/dc converter is proposed to reduce the dc bus voltage oscillations in a cascaded power converter system, where a load converter is controlled tightly with high-control bandwidth. In the proposed method, unlike conventional dc bus voltage stabilization methods for which auxiliary switches are used, the multiplexing utilization of the full bridge switches at the primary side of a PSFB is adopted. In this paper, to improve the dc bus voltage stability, an equivalent virtual resistor is implemented by applying the duty cycle regulation for both legs of the PSFB. The effectiveness of the proposed method on the dc voltage stabilization is examined through simulations and experiments. The achieved results reveal that the dc bus voltage stability is significantly improved with the proposed method.INDEX TERMS Integrated DC bus voltage conditioner, switch multiplexing utilization, virtual resistor, cascaded power converter, DC bus voltage stability.

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Section: Introductionmentioning

confidence: 89%

“…In this way, i b can be controlled to be approximately in phase with the fluctuation of u dc , and the proposed virtual resistor based control strategy can be effectively realized. The closed loop transfer function of the corrected IBVC control system can be expressed as in (22).…”

Section: Virtual Resistor Based Control Strategymentioning

confidence: 99%