双向LLC谐振型直流变换器设计与控制  

DESIGN AND CONTROL OF BIDIRECTIONAL LLC RESONANT DC CONVERTER

作　　者：温春雪[1] 李宇航 胡茗茗 朴政国[1] 周京华[1] 辛克锋 Wen Chunxue;Li Yuhang;Hu Mingming;Piao Zhengguo;Zhou Jinghua;Xin Kefeng(Power Electronic and Motor Drive Research Center,North China University of Technology,Beijing 100144,China;Development Research Center,China Datang Corporation Science and Technology Research Institute,Bejing 100040,China)

机构地区：[1]北方工业大学电力电子与电气传动工程研究中心,北京100144 [2]中国大唐集团新能源科学技术研究院发展研究中心,北京100040

出　　处：《太阳能学报》2020年第6期218-225,共8页Acta Energiae Solaris Sinica

基　　金：国家重点研发计划(2018YFB1503005.02);国家自然科学基金(51777002);北京市高水平创新团队建设计划(IDHT20180502)。

摘　　要：针对直流配电网中连接超级电容的LLC谐振直流变换器,利用双向LLC直流变换器电压稳态增益,设计变换器谐振回路的参数。运用等效电路模型法对双向LLC直流变换器进行小信号建模,分析设计变换器的闭环PI控制器,据此控制超级电容的充放电功率,维持系统母线电压稳定。最后,对所设计的LLC直流变换器在Matlab/Simulink里进行仿真分析,并通过实验样机进行实验验证,通过仿真和实验结果证实了该文所采用的理论分析与设计方法的正确性和可靠性。Based on the analysis of the working principle of the bidirectional LLC DC converter for the energy storage system,the parameters of the resonant tank are calculated by using the steady-state gain of the bidirectional LLC DC converter.In this thesis,the equivalent circuit model method is used to model the small-signal LLC DC converter,and the closed-loop PI controller is designed to control the charging and discharging power of the super capacitor and maintain the bus voltage stability.Finally,simulation analysis and prototype tests are carried out on the designed LLC DC converter,which confirms the correctness and reliability of the method of theoretical analysis and designing adopted in this paper.

关 键 词：储能系统 LLC谐振 直流变换器 超级电容 直流配电网 

分 类 号：TM46[电气工程—电器]