Zero‑current‑switching full‑bridge DC/DC converter with reduced conduction losses for renewable energy MVDC collection systems

다국어 초록 (Multilingual Abstract)

When compared to the conventional AC collection system, the DC collection system for renewable energy sources presents lots of advantages. High power high-voltage DC/DC converters are essential equipment for medium voltage DC (MVDC) grid. A novel zero-current-switching full-bridge DC/DC converter is proposed in this paper. In particular, a blocking capacitor is introduced to rapidly decay the circulating current to zero. Hence, both the switching loss and conduction loss can be reduced. A scaled-down 120 V/1.2 kV, 2 kW prototype was built to validate the effectiveness of the proposed converter.

참고문헌 (Reference)

1 Freijedo, F.D, "Stable and passive high-power dual active bridge converters interfacing MVDC grids" 65 (65): 9561-9570, 2018

2 Wang, H, "Research on the ZVZCS full bridge converter with current-double rectifier" 1-5, 2017

3 "REN21: Renewables 2020 global status report"

4 Li, X, "Input-independent and output-series connected modular DC–DC converter with intermodule power balancing units for MVdc integration of distributed PV" 35 (35): 1622-1636, 2020

5 Camurca, L, "Future MVDC applications using modular multilevel converter" 1024-1029, 2020

6 Suryadevara, R, "FB-ZCS DC–DC converter with dualcapacitor resonant circuit for renewable energy integration with MVDC grid" 56 (56): 6792-6802, 2020

7 Siddique, H.A.B, "Evaluation of DC collector- grid configurations for large photovoltaic parks" 33 (33): 311-320, 2018

8 Ibrahim, O, "Development of observer state output feedback for phase-shifted full bridge DC–DC converter control" 5 : 18143-18154, 2017

9 Zhou, Y, "Comparison of DC–DC converter topologies for offshore wind-farm application" 1-6, 2012

10 Yang, X, "Analysis and design of full-bridge converter with a simple passive auxiliary circuit achieving adaptive peak current for ZVS and low circulating current" 9 (9): 2051-2065, 2021

11 Zhuang, Y, "A voltagebalancer- based cascaded DC–DC converter with a novel power feedforward control for the medium-voltage DC grid interface of photovoltaic systems" 7 : 178094-178107, 2019

12 Shu, L, "A resonant ZVZCS DC–DC converter with two uneven transformers for an MVDC collection system of offshore wind farms" 64 (64): 7886-7895, 2017

13 Hu, J, "A maximum-output-power-point-tracking-controlled dual-active bridge converter for photovoltaic energy integration into MVDC grids" 34 (34): 170-180, 2019

14 Ning, G, "A hybrid resonant ZVZCS PWM full-bridge converter for large photovoltaic parks connecting to MVDC grids" 3 : 1078-1090, 2017

15 Zhou, Y, "A hybrid ZVZCS full-bridge converter for DC microgrid" 3355-3360, 2020

16 Ning, G, "A hybrid ZVZCS dual-transformer- based full-bridge converter operating in DCM for MVDC grids" 32 (32): 5162-5170, 2017

17 Dincan, C, "A high-power, medium-voltage, series-resonant converter for DC wind turbines" 33 (33): 7455-7465, 2018

18 Liu, J, "A dual-active-clamp quasi-resonant isolated boost converter for PV integration to medium-voltage DC grids" 8 (8): 3444-3456, 2020

19 Chen, W, "A comparison of medium voltage high power DC/DC converters with high step-up conversion ratio for offshore wind energy systems" 584-589, 2011

20 Mousavi, A, "A comparative study of a new ZCS DC–DC full-bridge boost converter with a ZVS activeclamp converter" 27 (27): 1347-1358, 2012