Design and Experimental Verification of a Three-Phase Dual-Active Bridge Converter for Offshore Wind Turbines
Design and Experimental Verification of a Three-Phase Dual-Active Bridge Converter for Offshore Wind Turbines
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海上风力发电机组三相双有源桥式变流器的设计与实验验证
DOI：
10.23919/ipec.2018.8507428
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
R. D. De Doncker
中科院分区：
文献类型：
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作者：
T. Jimichi;M. Kaymak;R. D. De Doncker
本文涉及用于海上风电的中压 (MV) DC-DC 转换器的设计和实验验证。涡轮机的额定功率往往会降低总成本。然而，较高的额定功率和涡轮机之间的较长距离会导致交流集电电网中的损耗较高，因为所需的电缆尺寸较大。此外，交流集电电网需要更高的额定电压以降低额定电流，即电缆尺寸，从而需要大型升压变压器。为了解决这些缺点，研究人员和工程师正在考虑采用纯直流集电极电网的系统。作者重点关注直流集电极电网，讨论了 10 MW ±25 kV DC-DC 转换器的设计，包括转换器结构和拓扑、半导体布置以及变压器以提高效率。基于上述考虑，本文描述了中频变压器的原型构建、实验验证和建议设计。实验结果和损耗分析验证了通过三相DAB拓扑、合适的半导体器件选择以及改进的中频变压器，10MW±25kV DC-DC变换器可以实现98.5%的效率。
This paper deals with design and experimental verification of a medium-voltage (MV) DC-DC converter intended for offshore wind. The power rating of the turbine tends to reduce the total cost. However, higher power ratings and longer distances between the turbines cause higher losses in the AC collector grid due to the required larger cable sizes. Furthermore, the need for higher voltage ratings in the AC collector grid to reduce the current rating i.e. cable sizes results in big step-up transformers. To solve these disadvantages, researchers and engineers are considering the system with a pure DC collector grid. With focus on the DC collector grid, the authors have discussed the design of a 10- MW ±25-kV DC-DC converter regarding the converter structure and topology, the semiconductor arrangement, and the transformer to increase the efficiency. Following the above considerations, this paper describes the prototype construction, the experimental verification, and the proposed design of the medium-frequency transformer. The experimental results and the loss analysis verify that the 10- MW ±25-kV DC-DC converter can achieve the efficiency of 98.5% by the three-phase DAB topology, the suitable selection of the semiconductor devices, and the revised medium-frequency transformer.