基于虚拟阻抗的二次滤波功率分频控制方法  

The Power Dividing Frequency Control of Second Order Filtering Based on Virtual Impedances

作　　者：杨朝雯 杨国朝 刘建军 王宏伟 白辛雨 YANG Zhaowen;YANG Guochao;LIU Jianjun;WANG Hongwei;BAI Xinyu(State Grid Tianjin Chengdong Electric Power Supply Company,Tianjin 300250,China)

机构地区：[1]国网天津市电力公司城东供电分公司,天津300250

出　　处：《电气传动》2022年第7期44-49,共6页Electric Drive

基　　金：天津电力科技项目:基于柔性开关的交直流配用电系统研究(KJ20-1-09)。

摘　　要：提出了一种基于虚拟阻抗的二次滤波功率分频控制方法,通过构建虚拟电容环和虚拟电感-电阻环来搭建隐形高通滤波器和隐形低通滤波器以实现不同储能单元对不同频段功率波动的补偿。首先介绍了直流微网分层控制体系,然后阐述了谐振型LCLC三端口直流母线电压控制器的工作原理以及拓扑特点,最后详细分析了所提虚拟阻抗二次滤波功率分频控制方法。A second order filtering power dividing frequency control strategy based on virtual impedance was proposed. The different frequency power compensation among different storage units by building invisible pass filters was achieved. The invisible pass filters including high pass filter and low pass filters were constructed by virtual capacitance loop and virtual inductance-resistance loop. Firstly,hierarchical control system of DC microgrid was introduced. Secondly,the operation and topology of LCLC resonant three-port converter were introduced.Finally,the proposed power dividing frequency control strategy of second order filtering based on virtual impedances was analyzed in detail.

关 键 词：谐振型LCLC三端口变换器 直流微网 分层控制 二次滤波 虚拟阻抗 

分 类 号：TM46[电气工程—电器] TM28[一般工业技术—材料科学与工程]