广西师范大学学报（自然科学版） ›› 2016, Vol. 34 ›› Issue (2): 15-20.doi: 10.16088/j.issn.1001-6600.2016.02.003

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耦合电感升压变换器开关管应力降低的研究

石林林1, 祝龙记1, 朱红2   

  1. 1.安徽理工大学电气与信息工程学院,安徽淮南232001;
    2.国网安徽省公司长丰县供电公司,安徽长丰231100
  • 收稿日期:2015-11-05 出版日期:2016-06-25 发布日期:2018-09-14
  • 通讯作者: 祝龙记(1964—),男,安徽淮南人,安徽理工大学教授,博士。E-mail:ljzhu@aust.edu.cn
  • 基金资助:
    国家自然科学基金资助项目(11105002)

Research of Reducing the Stress on the Switchin the Coupled Inductor Boost Circuit

SHI Linlin1, ZHU Longji1, ZHU Hong2   

  1. 1.College of Electrical and Information Engineering, Anhui University of Science and Technology, Anhui Huainan 232001,China.;
    2.Changfeng Power Supply Company of Anhui State Grid,Anhui Changfeng 231100,China
  • Received:2015-11-05 Online:2016-06-25 Published:2018-09-14

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摘要： 为了解决传统的升压电路拓扑因为受到寄生参数的影响而导致电压增益会受到极限占空比的限制,以及传统的耦合电感升压变换器由于漏感的存在而导致的开关管两端电压电流应力较大等一系列问题,在此提出一种新型的可用于光伏发电系统的、具有高增益和低电压电流应力的耦合电感升压变换器。该变换器在传统耦合电感升压变换器的基础上增加了由二极管、电感以及电容组成的无损吸收电路。由于耦合电感具有变压器效应,因此,相对于传统升压电路来说,耦合电感的这一特性,使电路中的电压增益有了较大的提高;由于电感具有抑制电流上升的作用,因此,开关管开通时,减轻了开关管的电流应力;在开关管S的两端并联由电感、电容以及二极管组成的无损吸收电路,有效吸收耦合电感升压变换器中的漏感能量,使得开关管两端的电压尖峰得到抑制,当开关管S彻底关断后,电容和电感通过副边绕组和输出二极管,将能量传递给负载,实现无损传输,进一步提升了电压增益。为了验证该新型耦合电感升压变换器的有效性,故在MATLAB/Simulink平台上搭建了该新型变换器和传统耦合电感升压变换器的仿真模型。通过对比2个模型的相应仿真波形,可以看出,相对于传统的耦合电感升压变换器,该新型变换器具有更高的电压增益,同时,开关管上的电压和电流应力也相对较小。

关键词: 耦合电感, 光伏发电, 无损吸收电路, 电压电流应力

Abstract: In order to solve the problem that the voltage gain is limited by the limit of the voltage gain because of the parasitic parameters in traditional boost converter and a series of problems caused by the presence of the leakage inductance in the traditional boost converter with coupled inductance, a new high gain coupled inductor boost converter for photovoltaic power generation system is proposed. Based on the traditional coupled inductor boost converter, the converter is added to the lossless absorption circuit composed of diode, inductor and capacitor. As the coupled inductor has the transformer effect, the new circuit has higher voltage gain, compared with the traditional boost converter with coupled inductance; Since inductance has the effect of inhibiting the rise of current, it can reduce the current stress of the switch tube when the switch tube is on; The lossless snubber circuit could absorb leakage inductance energy to suppress the voltage spike at bothends of the switch. When the switch is turned completely, the energy in the capacitor and inductance can be delivered to the load,which realizes the lossless transmission to further enhance the voltage gain. In order to verify the validity of the new coupled inductor boost converter, the simulation model of the new coupled inductor boost converter and the traditional coupled inductor boost converter are built on the MATLAB/Simulink platform. By comparing the corresponding simulation waveforms of the two models, it can be seen that the new converter has higher voltage gain and relatively smaller voltage and current stress on the switch tube than the traditional one.

Key words: coupled inductor, photovoltaic power generation, lossless snubber circuit, stress of the voltage and current

中图分类号: 

  • TM46
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