Breakdown Behavior of Metallized BOPP Film under the DC Superimposed Harmonic Condition

Yi, Bosi; Li, Hua; Jiang, Haoyu; Li, Lü; Chen, Qiren; Li, Zheng; Lin, Fuchang; Zhang, Chenchen

doi:10.1109/ceidp47102.2019.9009686

Cited by 7 publications

(3 citation statements)

References 9 publications

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“…Chen et al [2] reported the one-pulse breakdown characteristics of BOPP film under nanosecond pulse voltage, and found that the BOPP film breakdowns tended to occur at the rising edge of the nanosecond pulse waveform; at the same time, the authors also tested the breakdown strengths of different thicknesses of the BOPP film under the nanosecond pulse voltage, and pointed out that the breakdown characteristics of the BOPP film did not show the thickness effect. Literature [5] studied the effect of the number of harmonics on the breakdown characteristics of BOPP films when DC superimposed harmonics are applied, and the experimental results shown that the number of harmonics has no effect on the breakdown voltage of the films. The one-shot breakdown characteristics of BOPP films under different electric stresses were carried out in the above studies, however, for film capacitors under actual operating conditions, the insulation failure of BOPP films is mostly a cumulative breakdown that occurs after a certain number of charging and discharging times, which is significantly different from that of the one-shot breakdown under very strong electric fields in the existing studies.…”

Section: Introductionmentioning

confidence: 99%

Correlation between lifetime model of BOPP film and rise rate under nanosecond pulse voltage

Mi,

Chen,

Liu

et al. 2024

J. Phys. D: Appl. Phys.

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This paper aims to study the effect of rise rate (dV/dt) on the cumulative breakdown characteristics of biaxially oriented polypropylene (BOPP) film under nanosecond pulse voltage. The lifetime (NL) of BOPP film under nanosecond pulse voltage with different rise times (15~115ns) was carried out. It is found that the NL increases with the increase of the rise time, and decreases with the increase of the dV/dt. Meanwhile, the quantitative mathematical relationship between NL and dV/dt, and pulse voltage amplitude are established, respectively, and it is concluded that both the rise rate and pulse voltage amplitude on the lifetime of BOPP film by the inverse power model. The results of the study are expected to provide the experimental basis and mechanistic explanation for the evaluation of film capacitor lifetime under extreme conditions.

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Section: Introductionmentioning

confidence: 99%

Correlation between lifetime model of BOPP film and rise rate under nanosecond pulse voltage

Mi,

Chen,

Liu

et al. 2024

J. Phys. D: Appl. Phys.

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“…Although there is considerable research on the selfhealing law of MFCs based on BOPP, the self-healing properties of MFCs based on high-temperature polymer dielectrics, especially the lab-made dielectric materials are still to be studied. [45][46][47][48] The authors' group has investigated the self-healing behavior of MFCs based on different commercial polymer dielectrics systematically. [49] It is found that carbon content would influence the self-healing results greatly, and the commercial polyimide of Kapton exhibits poor self-healing ability especially when the sheet resistance is low because of the high carbon content.…”

Section: Introductionmentioning

confidence: 99%

Novel Polyetherimide Dielectrics: Molecular Design, Energy Storage Property, and Self‐Healing Performance

Cao,

Tong,

Wang

et al. 2023

Macromol. Rapid Commun.

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The development of high‐temperature resistant dielectrics with excellent dielectric properties and self‐healing behavior is crucial for the application of metallized film capacitors. In this work, a series of polyetherimide (PEI) dielectric films are designed and fabricated. The introduction of polar groups is in favor to the increase of permittivity, and the flexible connection such as the ether group will facilitate the reduction of dielectric loss. Moreover, the oxygen elements are beneficial to the “self‐healing” of metallized film capacitors. Consequently, the permittivity of 3.53–4.00, dissipation factor of 0.281–0.517%, and Weibull breakdown strength of 347–674 MV m−1 are obtained for the PEI dielectrics. In addition, PEI‐4 (BPADA‐BAPP) and PEI‐8 (BPADA‐MDA) are selected to further investigate dielectric breakdown (150 °C), electrical displacement‐electric filed (D‐E) loop (at room temperature and 150 °C) as well as self‐healing performance, which will evaluate their potential in practical applications. The results show that PEI‐8 has stable breakdown field strength and high charge–discharge efficiency at elevated temperatures. Metallized film capacitor based on PEI‐8 exhibits excellent self‐healing performance, with pleasing self‐clear morphology, high breakdown voltage, and reduced self‐healing energy. Therefore, PEI‐8 is considered as a potential candidate for metallized film capacitors applied under harsh conditions.

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“…When high frequency currents are injected from the connection terminals (on one side of the MFC), they need to be dispersed through the metal strips and wires into each element. Under the influence of different lengths of current paths and strong electromagnetic coupling of currents in different paths, there are large differences in the current distribution among elements inside the MFC, which will lead to increased heat generation and mechanical damage in some elements, causing degradation of element performance and thus reducing the reliability of the MFC [6][7][8]. Therefore, the current distribution among MFC elements is worth to be studied.…”

Section: Introductionmentioning

confidence: 99%

Transient current distribution among elements in metallized film capacitor for converter valves

Yi,

Zhang,

et al. 2023

J. Phys. D: Appl. Phys.

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The metalized film capacitors (MFC) in converter valves are subjected to high-frequency currents under the action of power electronic switching, which will cause large differences in currents among capacitor elements inside MFC and seriously affect the stability of MFC. In this paper, experiments were conducted to measure the current waveforms among 90 elements under impulse, short-circuit discharge and sine waves at different frequencies. The equivalent circuit topology was simplified by using decoupling and controlled source equivalence, and parameters were extracted by electromagnetic calculations combined with experiments. Finally, an equivalent circuit model was established and the current distribution among elements was calculated. Influenced by the reactance of the parasitic inductor and the capacitor element, the frequency range can be divided into 3 regions based on the current distribution characteristics: in the high frequency range (>100 kHz), the current is mainly concentrated on several capacitor elements near the connection terminals. In the middle frequency range (about 10 kHz–100 kHz), the current oscillates between elements and the inductor, resulting in a wavy distribution of current amplitude, strongly influenced by frequency. In the low frequency range (<10 kHz), the current distribution varies very little among 90 elements. These results can support the study of performance evolution, fault analysis and design optimization in MFC.

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Breakdown Behavior of Metallized BOPP Film under the DC Superimposed Harmonic Condition

Cited by 7 publications

References 9 publications

Correlation between lifetime model of BOPP film and rise rate under nanosecond pulse voltage

Correlation between lifetime model of BOPP film and rise rate under nanosecond pulse voltage

Novel Polyetherimide Dielectrics: Molecular Design, Energy Storage Property, and Self‐Healing Performance

Transient current distribution among elements in metallized film capacitor for converter valves

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