Magnetic Integrated Staggered Parallel High Gain Converter with LCL Voltage Doubling Unit

doi:10.11985/2019.01.010

Abstract

Abstract:

Aiming at the demand of grid-connected power generation of new energy such as photovoltaic, a magnetic integrated staggered parallel high-gain DC converter is proposed based on LCL double pressure unit. The traditional staggered parallel Boost converter is improved by replacing the energy storage inductance with LCL double pressure unit to increase the voltage gain, adding the three-level capacitance to reduce the voltage stress of the switch tube at the output end of the traditional converter, and reducing the magnetic integration of the inductor in the converter to reduce the volume of the converter. The input and output lines of the converter are improved as well as the dynamic performance, and the power density and conversion efficiency of the converter are improved. The main working waveforms of the converter and the equivalent circuit diagram of each mode are given. The voltage gain of the converter, the equivalent steady-state inductance of the converter and the transient equivalent inductance expression are deduced. At the same time, the design criterion of the coupling degree of the converter magnetic parts is given. It is verified that the correctness of the theory through simulation and experiment.

Key words: DC converter, LCL voltage doubler unit, magnetic integration, high gain, current ripple

CLC Number:

TM46

LI Hongzhu,SHI Qingchen,LIU Yan,LI Hongfan. Magnetic Integrated Staggered Parallel High Gain Converter with LCL Voltage Doubling Unit[J]. Journal of Electrical Engineering, 2019, 14(1): 52-60.

Figures/Tables 14

References 17

[1]	Yang Lung-Sheng, Liang Tsorng-Juu, Chen Jiann-Fuh . Transformerless DC-DC converters with high step-up voltage gain[J]. IEEE Transactions on Industrial Electronics, 2009., 56(8):3144-3152.
[2]	陈启超, 纪延超, 潘延林 , 等. 配电系统电力电子变压器拓扑结构综述[J]. 电工电能新术, 2015,34(3):41-48.
	Chen Qichao, Ji Yanchao, Pan Yanlin , et al. Summarization of the topology structure of power electronic transformer in distribution system[J]. Advanced Technology of Electrical Engineering and Energy, 2015,34(3):41-48.
[3]	易灵芝, 何东, 王书颢 , 等. 面向直流楼宇供电技术的新型多输入Buck-Boost变换器[J]. 电力自动化设备, 2014,34(5):86-92.
	Yi Lingzhi, He Dong, Wang Shuhao , et al. A new type of multi-input Buck-Boost converter for DC building power supply technology[J]. Electric Power Automation Equipment, 2014,34(5):86-92.
[4]	Dmitri Vinnikov, Indrek Roasto, Ryszard Strzelecki , et al. Step-up DC/DC converters with cascaded quasi-Z- source network[J]. IEEE Trans. on Industrial Electronis, 2012,59(10):3727-3736.
[5]	高伟, 罗全明, 张阳 , 等. 一种零输入电流纹波高增益DC-DC变换器[J]. 电工技术学报, 2018,33(2):284-292.
	Gao Wei, Luo Quanming, Zhang Yang , et al. A zero input current ripple high gain DC-DC converter[J]. Transactions of China Electrotechnical Society, 2018,33(2):284-292.
[6]	董卓, 张岩, 刘进军 , 等. 多单元二极管电容电感网络高增益直流变换器统一模型研究[J]. 中国电机工程学报, 2018,38(18):5527-5537.
	Dong Zhuo, Zhang Yan, Liu Jinjun , et al. Research on unified model of high gain DC converter for multi-unit diode capacitance inductance network[J]. Proceedings of the CSEE, 2018,38(18):5527-5537.
[7]	李微, 王议锋, 韩富强 , 等. 一种隔离型三端口双向LCLC多谐振直流变换器[J]. 电工技术学报, 2018,33(14):3231-3244.
	Li Wei, Wang Yifeng, Han Fuqiang , et al. An isolated three- port bidirectional LCLC multi-resonant DC converter[J]. Transactions of China Electrotechnical Society, 2018,33(14):3231-3244.
[8]	荣德生, 袁亚松, 孙瑄瑨 , 等. 基于倍压单元耦合电感高增益DC/DC变换器[J/OL]. 电源学报:1-10[2018-10-11]
	Rong Desheng, Yuan Yasong, Sun Xuanjin , et al. Based on the coupling inductance of double pressure unit,high gain DC/DC converter[J/OL]. Journal of Power Supply:1-10[2018-10-11]
[9]	孙鹏菊, 李正宇, 张冀 , 等. 一种基于倍压单元的双输入高增益直流变换器[J]. 中国电机工程学报, 2016,36(17):4694-4702.
	Sun Pengju, Li Zhengyu, Zhang Ji , et al. A dual input high gain DC converter based on double voltage unit[J]. Proceedings of the CSEE, 2016,36(17):4694-4702.
[10]	李洪珠, 曹人众, 张垒 , 等. 磁集成开关电感交错并联Buck/Boost变换器[J]. 电机与控制学报, 2018,22(6):87-95.
	Li Hongzhu, Cao Renzhong, Zhang Lei , et al. Magnetic integrated switch inductance staggered parallel Buck/Boost converter[J]. Electric Machines and Control, 2018,22(6):87-95.
[11]	石健将, 章江铭, 龙江涛 , 等. 高频变压器一次侧串联LLC+输出端并联Buck级联直流变换器[J]. 电工技术报, 2015,30(24):93-102.
	Shi Jianjiang, Zhang Jiangmin, Long Jiangtao , et al. A cascaded DC converter with primary series transformer LLC and output interleaved Buck[J]. Transactions of China Electrotechnical Society, 2015,30(24):93-102.
[12]	周雒维, 周远志, 罗全明 , 等. 一种交错并联高升压DC/DC变换器[J]. 电机与控制学报, 2014,18(12):10-16.
	Zhou Yiwei, Zhou Yuanzhi, Luo Quanming , et al. A staggered parallel high-boost DC/DC converter[J]. Electric Machines and Control, 2014,18(12):10-16.
[13]	秦岭, 冯志强, 戴翔 , 等. 基于开关-电容网络的三电平直流变换器简易构造法[J]. 中国电机工程报, 2017,37(2):635-643.
	Qin Ling, Feng Zhiqiang, Dai Xiang , et al. Simple construction method of three-level DC converter based on switch-capacitance network[J]. Proceedings of the CSEE, 2017,37(2):635-643.
[14]	朱玲, 李磊, 杨宁 . 隔离式三电平交-交直接变换器[J].电力自动化设备, 2010, 2010,30(8):54-57,62.
	Zhu Ling, Li Lei, Yang Ning . Isolated three-level AC-AC direct converter[J]. Electric Power Automation Equipment, 2010,30(8):54-57,62.
[15]	郭瑞, 王磊 . 混合储能系统六通道双向DC-DC变换器耦合电感研究[J]. 电工技术学报, 2017,32(1):117-128.
	Guo Rui, Wang Lei . Study on coupling inductance of six-channel bidirectional DC-DC converter in hybrid energy storage system[J]. Transactions of China Electrotechnical Society, 2017,32(1):117-128.
[16]	杨玉岗, 代少杰, 赵若冰 , 等. DC-DC变换器的交错并联磁集成技术研究综述[J]. 电气工程学报, 2015,10(8):1-13,85.
	Yang Yugang, Dai Shaojie, Zhao Ruobing , et al. A summary of research on staggered parallel magnetic integration Technology of DC-DC converters[J]. Journal of Electrical Engineering, 2015,10(8):1-13,85.
[17]	杨玉岗, 祁鳞, 李龙华 . 交错并联磁集成Buck变换器本质安全性输出纹波电压的分析[J]. 电工技术学报, 2014,29(6):181-188.
	Yang Yugang, Qi Lin, Li Longhua . Analysis of intrinsic safety output ripple voltage of staggered parallel magnetic integrated Buck converter[J]. Transactions of China Electrotechnical Society, 2014,29(6):181-188.

变量	传统Boost变换器	改进型交错并联 Boost变换器
电压增益	$\frac{1}{1-D}$	$\frac{4}{1-D}$
开关管电压应力	${{U}_{\text{o}}}$	$\frac{{{U}_{\text{o}}}}{2}$
电流纹波	$\frac{{{U}_{i\text{n}}}DT}{L}$	$\frac{{{U}_{\text{in}}}DT}{{{L}_{\text{ss}}}}$

参数	数值/μH	参数	数值/μH
L₁	10.62	L₂	10.58
L₃	10.70	L₄	10.55
M₁₂	10.16	M₃₄	10.19
M₁₃	6.68	M₁₄	6.64
M₂₃	6.76	M₂₄	6.57