双向全桥DC-DC变换器故障诊断研究

发布时间：2018-01-20 10:10

本文关键词： 全桥双向DC-DC变换器故障诊断开路故障有源移相　出处：《安徽理工大学学报(自然科学版)》2016年05期 　论文类型：期刊论文

【摘要】：随着智能电网建设需求的发展,无工频变压器大功率电力电子变换器,以其低污染、高效率、智能化等多种优势引起人们越来越多的关注。无工频变压器大功率变换器的两种单相拓扑,由级联式多电平AC-DC整流模块、双向DC-DC变换模块和多电平DC-AC逆变模块构成。根据双向全桥DC-DC变换器的故障诊断的原理,对现价段故障诊断的研究成果进行分析比较,提出了一种基于通过提取高频隔离变压器原边电压作为诊断特征的故障诊断方法。当开路故障诊断发生在双向全桥DC-DC变换器原边的任一开关时刻,可以产生的异常状态的指示,并且会在控制系统中触发一个有源移相,在此时可以准确的定位出故障开关的位置。并通过仿真实验对该故障诊断方法进行验证,证明了该方法的正确性和在实际电路中的可用性。
[Abstract]:With the development of smart grid construction, high-power power electronic converters without power frequency transformers have low pollution and high efficiency. Intelligent and other advantages have attracted more and more attention. Two single-phase topologies of high-power converters without power frequency transformers are composed of cascaded multilevel AC-DC rectifier modules. The bidirectional DC-DC transform module and multilevel DC-AC inverter module are constructed. According to the principle of fault diagnosis of bi-directional full-bridge DC-DC converter, the research results of fault diagnosis in current price section are analyzed and compared. A fault diagnosis method based on extracting the primary voltage of high frequency isolation transformer as the diagnostic feature is proposed when the open circuit fault diagnosis occurs at any switching time of the original edge of the bidirectional full-bridge DC-DC converter. Can produce abnormal state indication, and will trigger an active phase shift in the control system, at this time can accurately locate the position of the fault switch, and through simulation experiments to verify the fault diagnosis method. The correctness of the method and its availability in practical circuits are proved.
【作者单位】：淮河水利委员会水文局信息中心;
【分类号】：TM46
【正文快照】： 随着智能电网建设需求的发展,无工频变压器大功率电力电子变换器,以其低污染、高效率、智能化等多种优势引起人们越来越多的关注。无工频变压器大功率变换器的两种单相拓扑,由级联式多电平AC-DC整流模块、双向DC-DC变换模块和多电平DC-AC逆变模块构成。其中双向DC-DC变换模块

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