Two-Stage Parameter Design Methodology of a Generalized Resonant DC Transformer in Hybrid AC/DC Microgrid With Optimum Active Power Transmission

Huang, Jingjing; Zhang, Xin; Chen, Wen

doi:10.1109/jestpe.2019.2949777

Cited by 18 publications

(10 citation statements)

References 32 publications

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“…The load is resistive, and it can be adjusted from 2 to 400 Ω. The power circuit parameters are designed according to a two‐stage approach with the detailed analysis given in [29].…”

Section: Resultsmentioning

confidence: 99%

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A new double mode control strategy for power router with very wide DC voltage range

Huang

Zhang

Lin

et al. 2023

IET Power Electronics

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In household applications, the power router is a cost‐effective device for AC/DC power conversion. To make it compatible with various types of DC loads without introducing extra power conversion stages, it is important that the power router can work in an extremely wide DC voltage range. However, this poses great challenges for the controller design. To address this concern, a double mode control scheme is proposed. The high frequency resonant DC/DC converter is employed together with a DC/AC converter to form the power router. Its circuit features on voltage gain and active power ratio are presented to guide the accurate controller design. Mode I is designed to ensure the high efficiency DC/DC conversion while the desired output DC voltage of power router is tracked by a DC/AC converter. For mode II, the phase shift scheme is triggered to eliminate the loss induced by the reactive power, and the desired output DC voltage is adjusted by DC/DC converter. Mode I and II cooperate to guarantee the wide DC voltage range to satisfy different load requirements. The experimental validation in a lab‐scale power router prototype shows that the proposed scheme not only provides extremely wide voltage range, but also guarantees high efficiency by effectively tracking the resonant frequency.

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“…The load is resistive, and it can be adjusted from 2 to 400 Ω. The power circuit parameters are designed according to a two‐stage approach with the detailed analysis given in [29].…”

Section: Resultsmentioning

confidence: 99%

“…Based on derivations in [29], we can obtain the specific value of f r as:

\begin{equation}{f}_r = F({L}_m,{L}_{r1},n,{P}_0)\end{equation}

where F (*) indicates the function of *. In comparison, the variations of L m , L r 1 , and n are much smaller than that of P 0 .…”

Section: Proposed Double Mode Controlmentioning

confidence: 99%

A new double mode control strategy for power router with very wide DC voltage range

Huang

Zhang

Lin

et al. 2023

IET Power Electronics

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“…Thus, the control algorithm of the DCT should be simplified to reduce execution time of system-level control. As a result, compared with the relatively complex closed-loop control, the open-loop control is more competitive for DCT at hybrid AC/DC nano-grid applications, 9,[22][23][24][25][26] because the open-loop control is very simple and does not need extra sensors (low-cost).…”

mentioning

confidence: 99%

Robust and low‐cost design of LLC‐type DC transformer in hybrid AC / DC nano‐grids to improve energy conversion ability

Sun

Tong

Huang

et al. 2021

Int Trans Electr Energ Syst

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In the hybrid AC/DC nano‐grid, the LLC‐type DC transformer (DCT) is widely utilized in the DC and AC bus connection system (BCS) with high frequency to improve the system power density. However, it always employs the simple open‐loop scheme for not increasing the control complexity of the nano‐grid system, which creates a big challenge on the inherent features of the DCT circuit for the energy efficiency and conversion ability. Therefore, a robust and low‐cost design approach of the LLC‐type DCT is put forward in this paper based on the specific requirements of hybrid AC/DC nano‐grid. First of all, the design challenges of the LLC‐type DCT are discussed by analyzing the functions of BCS in nano‐grid application. Then, the detailed parameter design approach is presented step‐by‐step to meet the energy efficiency and conversion requirements in the full power range. Finally, a 6 kW nano‐grid prototype is established to verify the effectiveness of the proposed design method. The results show that the designed DCT can enjoy good energy efficiency and conversion ability with simple control and hence accommodate the high‐frequency nano‐grid application.

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“…Huang et al analyzed the active power transfer of generalized CLLC-type DAB converters in different conditions, and manually tried out all frequency options to determine the optimal value [50]. In [51], voltage conversion gain and active power transfer were analyzed with respect to resonant tank parameters, and the optimization problem was solved manually with mathematical simplifications.…”

Section: Existing Circuit Parameter Design Approaches For Dc-dc Conve...mentioning

confidence: 99%

“…The dual active bridge (DAB) isolated bidirectional DC-DC converter has been widely adopted in many applications since it was firstly proposed in 1992 [7], such as wireless power transfer, electric vehicles, DC microgrid [51] and solid state transformer [162]. This topology consists of one high-frequency transformer and two full bridges, as shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Applications of artificial intelligence in the circuit and modulation design of DC-DC converters

Li¹

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Two-Stage Parameter Design Methodology of a Generalized Resonant DC Transformer in Hybrid AC/DC Microgrid With Optimum Active Power Transmission

Cited by 18 publications

References 32 publications

A new double mode control strategy for power router with very wide DC voltage range

A new double mode control strategy for power router with very wide DC voltage range

Robust and low‐cost design of LLC‐type DC transformer in hybrid AC / DC nano‐grids to improve energy conversion ability

Applications of artificial intelligence in the circuit and modulation design of DC-DC converters

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