High-Accuracy Capacitance Monitoring of DC-Link Capacitor in VSI Systems by <i>LC</i> Resonance

Li, Hao; Xiang, Dan; Han, Xu; Zhong, Xuefei; Yang, Xingwu

doi:10.1109/tpel.2019.2904551

Cited by 44 publications

(19 citation statements)

References 27 publications

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“…Considering that LESL is very small (on the order of 10−100 nH [41]) at the working frequency of converters (i.e., low-and mid-frequency bands in Fig. 2), which can be ignored in dc-link capacitors.…”

Section: A Parameters Estimation Principlesmentioning

confidence: 99%

“…Using the discharge profiles vdc and iC, the capacitance can be estimated using (18). In [41], an LC-resonance capacitor-discharge profile based scheme is proposed for an ASD system [see Fig. 13(a)].…”

Section: B Implementation Of CM Schemes Based On Principle Iimentioning

confidence: 99%

“…[40]− [42]: Control capacitors discharge through the motor windings [40], [41] and electric network [42] in the converter, then estimate C using the discharging profile.…”

Section: Resr: <13% C: <0047%mentioning

confidence: 99%

“…Quasi-online estimation, motor is stopped, need control of switches [40], [41], electric vehicles application [40], railway trains application [42].…”

Section: Resr: <13% C: <0047%mentioning

confidence: 99%

“…7) Applying the emerging artificial intelligence (AI) technology to condition monitoring of capacitors. Real online C <5.2% [27] Signal injection (1D, 1H) Quasi online RESR: <2% [31] C: <0.4% [34] [29]− [36] Discharging profile (2A) Quasi online C: <2.1% [41] [40]− [42] Data training (3A) Real online C: <2% [46] [43]− [47] PV inverter System operation model (1C, 1G)…”

Section: B Challengesmentioning

confidence: 99%

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An Overview of Condition Monitoring Techniques for Capacitors in DC-Link Applications

Zhao

Davari

et al. 2021

IEEE Trans. Power Electron.

135

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Capacitors are widely used in dc links of power electronic converters to balance power, suppress voltage ripple, and store short-term energy. Condition monitoring (CM) of dc-link capacitors has great significance in enhancing the reliability of power converter systems. Over the past few years, many efforts have been made to realize CM of dc-link capacitors. This paper gives an overview and a comprehensive comparative evaluation of them with emphasis on the application objectives, implementation methods, and monitoring accuracy when being used. First, the design procedure for the condition monitoring of capacitors is introduced. Second, the main capacitor parameters estimation principles are summarized. According to these principles, various possible CM methods are derived in a step-by-step manner. On this basis, a comprehensive review and comparison of CM schemes for different types of dc-link applications are provided. Finally, application recommendations and future research trends are presented.

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Section: A Parameters Estimation Principlesmentioning

confidence: 99%

Section: B Implementation Of CM Schemes Based On Principle Iimentioning

confidence: 99%

“…[40]− [42]: Control capacitors discharge through the motor windings [40], [41] and electric network [42] in the converter, then estimate C using the discharging profile.…”

Section: Resr: <13% C: <0047%mentioning

confidence: 99%

“…Quasi-online estimation, motor is stopped, need control of switches [40], [41], electric vehicles application [40], railway trains application [42].…”

Section: Resr: <13% C: <0047%mentioning

confidence: 99%