Collaborative control strategy of power electronic transformer and fault current limiter in DC microgrid

Kong, Liang; Nian, Heng

doi:10.1049/joe.2017.0639

Cited by 13 publications

(8 citation statements)

References 6 publications

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“…In these three scenarios, the BIC is in charge of the power regulation, and its control scheme has been studied in many literatures 8‐10 . Practically, the switching frequency of BIC is relatively low.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, multiple bidirectional AC/DC power converters are needed for the integration, which degrades system energy efficiency and increases the cost. As a consequence, the hybrid AC/DC nano‐grid is emerging to connect the AC and DC sub‐system at household applications 7‐9 …”

Section: Introductionmentioning

confidence: 99%

“…As a consequence, the hybrid AC/DC nano-grid is emerging to connect the AC and DC sub-system at household applications. [7][8][9]…”

mentioning

confidence: 99%

“…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%

“…In these three scenarios, the BIC is in charge of the power regulation, and its control scheme has been studied in many literatures. [8][9][10] Practically, the switching frequency of BIC is relatively low. Therefore, the stability issue of BCS is usually settled by regulating BIC to acquire the desired output equivalent impedance, which is not further discussed here.…”

mentioning

confidence: 99%

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Robust and low‐cost design ofLLC‐type DCtransformer in hybridAC/DCnano‐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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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…As a consequence, the hybrid AC/DC nano-grid is emerging to connect the AC and DC sub-system at household applications. [7][8][9]…”

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%