Multi-modular system plays an important role in power system architecture because low voltage and low power converters can be connected in any combination parallel or series at input/ output side in order to obtained ...Multi-modular system plays an important role in power system architecture because low voltage and low power converters can be connected in any combination parallel or series at input/ output side in order to obtained any given power system specifications. Multi-modular boost haft bridge DC-DC converter in the configuration of input series output parallel has been investigated in this paper. The boost half bridge DC-DC converters are connected in input series output parallel con- figuration in order to achieve equal input voltage sharing and output current sharing between the con- verters. This can be achieved with the help of dynamic control scheme which consists of two loops, a voltage loop and a current loop, for each module. Dynamic behavior of multi-modular converter configuration has been observe by varying the load condition. Moreover, the results obtained through multi-modular converter describe that the system has good dynamic and steady state response. Al- though two converter modules are focused in this paper but it can be modified to any number of modules.展开更多
The concept of connecting two boost half bridge DC-DC converter modules in input-paral- lel output-parallel configuration is presented. The input-parallel-output-parallel （IPOP） converter consists of multiple boost ...The concept of connecting two boost half bridge DC-DC converter modules in input-paral- lel output-parallel configuration is presented. The input-parallel-output-parallel （IPOP） converter consists of multiple boost half bridge （BHB） DC-DC converter modules which are connected in par- allel at the input and output side. This kind of converter is an attractive solution for high power ap- plications. The correlation between input current sharing （ICS） and output current sharing （OCS） of the IPOP converter basic modules is described. Two loop control strategies, consisting of input cur- rent loop and output voltage loop, have been developed to achieve equal ICS and OCS in this present work. The control strategy for the IPOP configuration of boost haft bridge DC-DC converter has been verified for different load conditions （half load and full load）, The IPOP system proposed here is comprising of two modules but it can be extended to three or more. The performance of the pro- posed system along with the control strategy is verified by simulation in MATLAB using Simpower tool. Finally the satisfactory simulation results are obtained.展开更多
随着新能源的大规模利用以及直流配电网的快速发展,直流变压器受到广泛关注.输入串联输出并联-双有源桥DC-DC变换器(Input Series Output Parallel-Dual Active Bridge,ISOP-DAB)结构能够有效解决高压大功率的双向传输问题,但面临着模...随着新能源的大规模利用以及直流配电网的快速发展,直流变压器受到广泛关注.输入串联输出并联-双有源桥DC-DC变换器(Input Series Output Parallel-Dual Active Bridge,ISOP-DAB)结构能够有效解决高压大功率的双向传输问题,但面临着模块间的均压均流挑战.针对现存均压均流控制方法繁多但缺乏归纳总结的问题,对不同控制方案进行了多方面对比分析.首先,简要介绍了ISOP-DAB的基本结构和功能;其次,结合PSIM仿真分析了控制上完全独立的共同占空比控制、上翘控制;然后综合比较了控制上有耦合的特殊输入均压控制、输出均流控制;最后,对提及的所有控制方法进行了归纳总结,确定了各类方法的可行性及适用范围,对比了其优缺点,以便为ISOP-DAB的控制器设计提供参考.展开更多
直流变压器是互联网数据中心(Internet Data Center,IDC)配电系统的重要单元,其技术水平影响着整个IDC配电系统的运营水平。以逻辑链路控制(Logical Link Control,LLC)谐振变换器为基础单元模块,以输入串联、输出并联为拓扑结构,设计了...直流变压器是互联网数据中心(Internet Data Center,IDC)配电系统的重要单元,其技术水平影响着整个IDC配电系统的运营水平。以逻辑链路控制(Logical Link Control,LLC)谐振变换器为基础单元模块,以输入串联、输出并联为拓扑结构,设计了一款基于IDC配电系统的直流变压器。首先介绍了直流变压器系统的拓扑结构,并分析了其均压均流特性;其次又提出了一种三环控制策略,主要对直流变压器系统进行均压均流控制,该策略可以使系统稳定输出额定电压,并使系统具有良好的均压均流效果;最后设计一款10 kV/400 V的直流变压器系统,实验表明该系统运行效果良好,具有较高的稳定性和调节能力。展开更多
文摘Multi-modular system plays an important role in power system architecture because low voltage and low power converters can be connected in any combination parallel or series at input/ output side in order to obtained any given power system specifications. Multi-modular boost haft bridge DC-DC converter in the configuration of input series output parallel has been investigated in this paper. The boost half bridge DC-DC converters are connected in input series output parallel con- figuration in order to achieve equal input voltage sharing and output current sharing between the con- verters. This can be achieved with the help of dynamic control scheme which consists of two loops, a voltage loop and a current loop, for each module. Dynamic behavior of multi-modular converter configuration has been observe by varying the load condition. Moreover, the results obtained through multi-modular converter describe that the system has good dynamic and steady state response. Al- though two converter modules are focused in this paper but it can be modified to any number of modules.
文摘The concept of connecting two boost half bridge DC-DC converter modules in input-paral- lel output-parallel configuration is presented. The input-parallel-output-parallel （IPOP） converter consists of multiple boost half bridge （BHB） DC-DC converter modules which are connected in par- allel at the input and output side. This kind of converter is an attractive solution for high power ap- plications. The correlation between input current sharing （ICS） and output current sharing （OCS） of the IPOP converter basic modules is described. Two loop control strategies, consisting of input cur- rent loop and output voltage loop, have been developed to achieve equal ICS and OCS in this present work. The control strategy for the IPOP configuration of boost haft bridge DC-DC converter has been verified for different load conditions （half load and full load）, The IPOP system proposed here is comprising of two modules but it can be extended to three or more. The performance of the pro- posed system along with the control strategy is verified by simulation in MATLAB using Simpower tool. Finally the satisfactory simulation results are obtained.
文摘随着新能源的大规模利用以及直流配电网的快速发展,直流变压器受到广泛关注.输入串联输出并联-双有源桥DC-DC变换器(Input Series Output Parallel-Dual Active Bridge,ISOP-DAB)结构能够有效解决高压大功率的双向传输问题,但面临着模块间的均压均流挑战.针对现存均压均流控制方法繁多但缺乏归纳总结的问题,对不同控制方案进行了多方面对比分析.首先,简要介绍了ISOP-DAB的基本结构和功能;其次,结合PSIM仿真分析了控制上完全独立的共同占空比控制、上翘控制;然后综合比较了控制上有耦合的特殊输入均压控制、输出均流控制;最后,对提及的所有控制方法进行了归纳总结,确定了各类方法的可行性及适用范围,对比了其优缺点,以便为ISOP-DAB的控制器设计提供参考.
文摘直流变压器是互联网数据中心(Internet Data Center,IDC)配电系统的重要单元,其技术水平影响着整个IDC配电系统的运营水平。以逻辑链路控制(Logical Link Control,LLC)谐振变换器为基础单元模块,以输入串联、输出并联为拓扑结构,设计了一款基于IDC配电系统的直流变压器。首先介绍了直流变压器系统的拓扑结构,并分析了其均压均流特性;其次又提出了一种三环控制策略,主要对直流变压器系统进行均压均流控制,该策略可以使系统稳定输出额定电压,并使系统具有良好的均压均流效果;最后设计一款10 kV/400 V的直流变压器系统,实验表明该系统运行效果良好,具有较高的稳定性和调节能力。
