Robust Open-Switch Fault Diagnosis of Bidirectional DC/DC Converters Based on Extended Kalman Filter With Multiple Corrections

IF 5.2 1区 工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Shichuan Ding;Dewei Tang;Jun Hang;Jifeng Zhao;Shuonan Gui
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引用次数: 0

Abstract

Open-switch fault of power transistors is a common problem in bidirectional DC/DC converter, which can cause considerable property loss and personal safety risk. However, the traditional model-based fault diagnosis methods mainly focus on the rapidity and rarely consider the parameter change of bidirectional DC/DC converter, which is poor in robustness. Therefore, this paper proposes a robust open-switch fault diagnosis method for bidirectional DC/DC converters in a hybrid energy storage system (HESS) based on extended Kalman filter (EKF) with multiple corrections, where the measured currents on the battery side and the supercapacitor side are used to correct the observed currents obtained by EKF until the residuals between the observed values and the measured values are less than the set correction thresholds, thus avoiding the influence of the parameter variations. The open-switch fault detection is achieved by judging whether the correction times of the currents on the battery side and the supercapacitor side exceed the maximum correction times. The open-switch fault location is achieved through judging whether the corrected value on the fault side exceeds the set correction threshold. The proposed method is validated through simulation and experimental studies. Both the results show the robustness of fault diagnosis for bidirectional DC/DC converter.
基于多校正扩展卡尔曼滤波器的双向 DC/DC 转换器稳健开路开关故障诊断
功率晶体管开路开关故障是双向 DC/DC 转换器中的常见问题,会造成巨大的财产损失和人身安全风险。然而,传统的基于模型的故障诊断方法主要关注快速性,很少考虑双向 DC/DC 转换器的参数变化,鲁棒性较差。因此,本文提出了一种基于扩展卡尔曼滤波器(EKF)的混合储能系统(HESS)双向 DC/DC 转换器鲁棒开路开关故障诊断方法,即利用电池侧和超级电容器侧的测量电流对 EKF 得到的观测电流进行修正,直到观测值与测量值之间的残差小于设定的修正阈值,从而避免了参数变化的影响。开路开关故障检测是通过判断电池侧和超级电容器侧电流的修正时间是否超过最大修正时间来实现的。开路开关故障定位是通过判断故障侧的修正值是否超过设定的修正阈值来实现的。通过仿真和实验研究验证了所提出的方法。这两个结果都表明了双向 DC/DC 转换器故障诊断的鲁棒性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
IEEE Transactions on Circuits and Systems I: Regular Papers
IEEE Transactions on Circuits and Systems I: Regular Papers 工程技术-工程:电子与电气
CiteScore
9.80
自引率
11.80%
发文量
441
审稿时长
2 months
期刊介绍: TCAS I publishes regular papers in the field specified by the theory, analysis, design, and practical implementations of circuits, and the application of circuit techniques to systems and to signal processing. Included is the whole spectrum from basic scientific theory to industrial applications. The field of interest covered includes: - Circuits: Analog, Digital and Mixed Signal Circuits and Systems - Nonlinear Circuits and Systems, Integrated Sensors, MEMS and Systems on Chip, Nanoscale Circuits and Systems, Optoelectronic - Circuits and Systems, Power Electronics and Systems - Software for Analog-and-Logic Circuits and Systems - Control aspects of Circuits and Systems.
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