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Research on High-efficiency Bidirectional dc-dc Converter for dc Distribution System

直流配电系统高效双向DC-DC变换器的研究

基本信息

批准号：
18560276
负责人：
MIURA Yushi
金额：
$ 2.4万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18560276/
关键词：
Electric Power Engineering Power Electronics DC Distribution System Energy Storage Electric Double Laver Capcitor Distributed Generation

项目摘要

A high-efficiency isolated-type full-bridge bidirectional dc/dc converter, which is employed for energy storage systems such as secondary batteries and electric double layer capacitors (EDLCs), is investigated. This converter consists of a low-voltage-side current-type converter, a high-voltage side voltage-type converter, a high frequency transformer between them, and an active clamp circuit fir suppression of overvoltage due to current commutation and realization of soft switching of switching devices.With a proposed novel control method, soft switching of every switching device of the converter was confirmed in both boost and buck operation modes through numerical simulation. We also carried out experiments using a 1 kW dc-dc converter that is a thousandth scale of an assumed converter in a dc distribution system. The converter employed an Intelligent Power Module of IGBTs as switching devices, and DSP and FPGA as control devices. Soft switching of all the switching devices were dem … More onstrated in both the boost and buck operation through the experiments.The measured conversion efficiencies are 83.3% in the boost operation and 83.1% in the buck operation, respectively. According to the results of loss analysis, the efficiency of the assumed 1 MW converter is estimated to be more than 95% on the assumption of reasonable efficiency of the transformer and reactors.In addition, the EDLC is investigated as an energy storage device. We employed a three-stage ladder type equivalent circuit for the EDLC, and derived its transfer function. To determine the parameters of the equivalent circuit, we conducted constant current charge and discharge, and resistor discharge experiments, and compared the results of experiments and numerical simulations. As a result, we found that the three-stage ladder type equivalent circuit well simulated the actual EDLC in the constant current operation, however the single-stage ladder-type equivalent circuit showed good agreement in the resistor discharge experiment. Less

研究了一种用于二次电池和双电层电容器等储能系统的高效率隔离型全桥双向DC/DC变换器。该变换器由低压侧电流型变换器、高压侧电压型变换器、它们之间的高频Transformer以及抑制换流过电压和实现开关器件软开关的有源箝位电路组成，通过数值仿真，确定了变换器在升压和降压两种工作模式下各开关器件的软开关。我们还进行了实验，使用1千瓦的DC-DC转换器，这是一个千分之一的规模，假设转换器在直流配电系统。该变换器采用IGBT智能功率模块作为开关器件，DSP和FPGA作为控制器件。对所有开关器件的软开关进行了dem ...更多信息实验结果表明，在升压和降压两种工作模式下，转换效率分别为83.3%和83.1%。根据损耗分析的结果，在假定Transformer和电抗器的效率合理的前提下，估计了1 MW变流器的效率大于95%，并将双电层电容器作为储能装置进行了研究。我们采用了一个三级梯形等效电路的EDLC，并推导出其传递函数。为了确定等效电路的参数，进行了恒流充放电和电阻放电实验，并将实验结果与数值模拟结果进行了比较。结果表明，三级梯形等效电路在恒流工作时能很好地模拟实际双电层电容器，而单级梯形等效电路在电阻放电实验中表现出很好的一致性。少