An Online Monitoring Scheme of DC-Link Capacitor's ESR and C for a Boost PFC Converter

Yao, Kai; Tang, Weijie; Bi, Xiaopeng; Lyu, Jing

doi:10.1109/tpel.2015.2496267

Cited by 62 publications

(32 citation statements)

References 22 publications

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“…Power factor correction (PFC) converters are widely used in ac/dc conversion to improve power factor (PF) and reduce total harmonic correction (THD). The condition monitoring schemes in [56]− [61] are designed for PFC converters, which are derived based on Principle I.…”

Section: B CM For Capacitors In Pfc Convertermentioning

confidence: 99%

“…The scheme in [60] analyzes the steady-state waveforms on the switching-frequency scale. Considering the line-frequency scale of a boost PFC, [61] uses the capacitor voltage at 0 and π/4 instants to estimate capacitor parameters. According to the input and output power balance, RESR and C are calculated as (25), where Vdc is the average capacitor voltage.…”

Section: Resr: <95%mentioning

confidence: 99%

“…a) The schemes are all real-online schemes, which are based on Principle I. b) The capacitor current directly measurement schemes in [56]− [58] (based on 1B, 1F) and capacitor current estimation schemes in [60], [61] (based on 1C, 1G) required additional current sensors or hardware circuits to obtain capacitor current. Moreover, the schemes in [56]− [58], [60] require high-frequency sampling to achieve ripple signals.…”

Section: Resr: <95%mentioning

confidence: 99%

“…Others are implemented on-site in a real system, i.e., real-online and quasi-online schemes. Here, different types of dc-link applications are considered, such as adjustable speed drive (ASD) systems [25]− [47], photovoltaic (PV) grid-connected inverters [48]− [55], power factor correction (PFC) converters [56]− [61], and dc/dc buck and boost converters [62]− [101]. Moreover, the implementation methods are various.…”

Section: Introductionmentioning

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.

140

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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: B CM For Capacitors In Pfc Convertermentioning

confidence: 99%

Section: Resr: <95%mentioning

confidence: 99%

Section: Resr: <95%mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Zhao

Davari

et al. 2021

IEEE Trans. Power Electron.

140

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“…Use of Hilbert transform, Kalman Filter, LSA, DFT and EMD techniques could make the methods suggested in [21]- [23], computationally intensive and may require additional processor/controller for calculations. A technique for ESR estimation in power factor correction (PFC) boost converter is suggested in [24]. The technique utilizes the low frequency component in input voltage to estimate ESR.…”

Section: Introductionmentioning

confidence: 99%

Online Monitoring Technique for Aluminum Electrolytic Capacitor in Solar PV-Based DC System

Ahmad

Agarwal

Anand

2016

IEEE Trans. Ind. Electron.

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To interconnect low voltage solar photovoltaics (PV) with dc system, a dc-dc boost converter is required. To minimize the switching frequency oscillations in solar PV voltage, Aluminum Electrolytic Capacitors (AECs) are connected between solar PV and the converter. Operational life of AECs depend on electrical and environmental parameters and is less than that of solar PV panels. Equivalent Series Resistance (ESR) of AEC increases with life, thereby increasing the voltage ripple across PV terminals. This results in less power extraction from solar PV. This paper proposes a method for health monitoring of AEC using the parameters measured for maximum power point tracking (MPPT) (PV voltage and current). The proposed technique is applicable for both Continuous Conduction Mode (CCM) and Discontinuous Conduction Mode (DCM) of operation of the converter. Effect of temperature on ESR is incorporated for accurate determination of the health of capacitor. Key advantage is that no additional current or voltage sensor is required to implement this technique, thereby offering a low cost solution.Further, the proposed technique does not require significant processing capabilities and is implemented in the same digital controller used for MPPT. Detailed simulation studies are carried out and results are included in this paper. A laboratory prototype of dc-dc boost converter is developed for experimentation. Results are in agreement to that obtained from simulation studies.

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Applications and Specifics

2021

Electrical Safety Engineering of Renewable EnergySystems

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An Online Monitoring Scheme of DC-Link Capacitor's ESR and C for a Boost PFC Converter

Cited by 62 publications

References 22 publications

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

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

Online Monitoring Technique for Aluminum Electrolytic Capacitor in Solar PV-Based DC System

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