Surface flashover performance of phenolphthalein modified LDPE in vacuum

Li, Shengtao; Nie, Yongjie; Wang, Weiwang; Yang, Liuqing; Min, Daomin

doi:10.1109/tdei.2016.7736888

Cited by 14 publications

(18 citation statements)

References 32 publications

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“…It can demonstrate that the surface flashover voltage of the LDPE modified by phenolphthalein is improved successfully. The surface flashover voltage increases as the trap level increases in Fig . 16 [144]. As the phenolphthalein concentration increases, the spherulite size decreases significantly and the trap level increases.…”

Section: Bulk Modificationmentioning

confidence: 98%

“…Previous work has proved that phenolphthalein addition can change the morphology of LDPE [143]. Authors use phenolphthalein-adding treatment as another way to control the aggregation structure of LDPE in order to improve the surface flashover performance in vacuum [144]. LDPE samples modified by phenolphthalein were prepared by melt blending method.…”

Section: Bulk Modificationmentioning

confidence: 99%

“…Some of these results show that the trap levels became shallower after insulator modification, and have a negative correlation with the surface flashover voltage [82,87,[93][94][95][96]106]. In other results, however, the trap levels become deeper after insulator modification and have a positive correlation with the surface flashover voltage [117,119,120,122,130,135,136,138,139,141,144,149]. These studies suggest that there seems to be a controversy about the effect of trap parameters on surface flashover performance.…”

Section: 'U-shaped' Dependence Of Surface Flashover Performance On Thmentioning

confidence: 99%

“…Fig. 15 shows the relationship between the surface flashover voltage in vacuum and the phenolphthalein concentration [144]. It can demonstrate that the surface flashover voltage of the LDPE modified by phenolphthalein is improved successfully.…”

Section: Materials Modificationmentioning

confidence: 99%

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Improvement of surface flashover in vacuum

2020

High Voltage

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Surface flashover of insulation systems is a basic issue in the field of high voltage and electrical insulation. To improve the surface flashover performance is of great significance for the development of advanced power transmission equipment and insulation materials. This study reviews the research progress of surface flashover in vacuum regarding to effective methods to improve the surface flashover performance in vacuum, including insulation system optimisation and material modification. The former one is beneficial to reduce the electric field distortion, and the later one is able to adjust the surface trap parameters of the material through physical and chemical methods. In addition, the 'U-shaped' curve is proposed to reveal the relationship between surface flashover voltage and surface trap level, discovering the synthetic effects of surface traps on surface flashover. It is expected that the 'U-shaped' curve will become a guidance to improve surface flashover performance through adjusting trap parameters. Moreover, several suggestions are made to build unified surface flashover model which is suitable to the range from high vacuum to high pressure.

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Section: Bulk Modificationmentioning

confidence: 98%

Section: Bulk Modificationmentioning

confidence: 99%

Section: 'U-shaped' Dependence Of Surface Flashover Performance On Thmentioning

confidence: 99%

Section: Materials Modificationmentioning

confidence: 99%

See 2 more Smart Citations

Improvement of surface flashover in vacuum

2020

High Voltage

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“…Thus, the appropriate increasing of deep trap density can restrain the procedure of the secondary avalanche to enhance the surface discharge voltage. However, for the shallow traps, the trapped charges more easily escape under the external stimuli to trigger the secondary avalanche, which is negative to improve the surface discharge voltage [18]. This paper used the SPD method to research the surface charge behaviours of oil-paper insulation under DC voltage at different temperatures.…”

Section: Introductionmentioning

confidence: 99%