基于单相电力电子变压器反馈的协调控制研究  

Research on Coordinated Control Based on Feedback of Single-Phase Power Electronic Transformer

作　　者：司冯淼 王毅颖 张远辉 刘佩情 SI Feng-miao;WANG Yi-ying;ZHANG Yuan-hui;LIU Pei-qing(School of Mechanical and Equipment Engineering,Hebei University of Engineering,Handan Hebei 056038,China;Hebei Coal Ecological Protection Mining Industry Technology Research Institute,Handan Hebei 056038,China)

机构地区：[1]河北工程大学机械与装备工程学院,河北邯郸056038 [2]河北省煤炭生态保护开采产业技术研究院,河北邯郸056038

出　　处：《计算机仿真》2024年第12期382-387,共6页Computer Simulation

基　　金：河北省自然科学基金资助项目(E2020402064);河北省创新能力提升计划项目(215676140H);邯郸市科学技术研究与发展计划项目(21422093229,20312904002)。

摘　　要：目前,在交直流混合配电网中广泛采用的是两级级联电力电子变压器,该结构由输入级级联整流器与隔离级双向全桥DC/DC变换器组成。当隔离双向全桥DC/DC变换器的漏感参数不一致时,会导致功率不均衡的问题,从而降低系统稳定性,增大直流母线电压波动。针对上述问题,对系统功率传输特性进行分析,提出基于单相电力电子变压器反馈的能量流动协调控制策略。利用输入级的有功分量参与隔离级的移相比生成,并使用隔离级的移相比参与整流级有功电流参考值的生成,调节上下两单元功率平衡。利用Simulink验证了所提控制方法的正确性和有效性。At present,two-stage cascaded power electronic transformers are widely used in AC/DC hybrid distribution networks,which consist of a cascading rectifier at the input stage and a bidirectional full-bridge DC/DC converter at the isolation stage.When the leakage inductance parameters of the isolated bidirectional full-bridge DC/DC converter are inconsistent,it can lead to power imbalance,thereby reducing system stability and increasing DC bus voltage fluctuation.To address the above issues,analyze the power transmission characteristics of the system and propose an energy flow coordination control strategy based on feedback from single-phase power electronic transformers.Utilize the active component of the input stage to participate in the phase shift ratio generation of the isolation stage,and use the phase shift ratio of the isolation stage to participate in the generation of the active current reference value of the rectification stage,adjusting the power balance of the upper and lower units.The correctness and effectiveness of the proposed control method were verified using Simulink.

关 键 词：固态变压器 隔离双向变换器 级间功率差异 协调控制 均衡控制 

分 类 号：TM743[电气工程—电力系统及自动化]