宽频高压脉冲参数对聚酰亚胺薄膜局部放电特性的影响
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TM854

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国家自然科学基金资助项目(51977110);国家电网有限公司科技项目(J2020032)

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    摘要:

    为了探索脉冲电应力作用下高压绝缘栅双极型晶体管(IGBT)器件绝缘材料的局部放电特性,建立高频高压脉冲作用下的局部放电测量平台,系统研究了电压幅值、脉冲重复频率、上升沿时间和脉宽对聚酰亚胺薄膜局部放电特性的影响规律。结果表明:随着电压幅值从3 kV增加至11 kV,脉冲上升沿处的局部放电信号幅值逐渐增大,而放电时延逐渐减小;随着脉冲重复频率从50 Hz增大至100 kHz,上升沿的放电时延逐渐增大但局部放电信号幅值几乎不变;随着上升沿时间从136 ns增大至300 ns,放电时延逐渐增大且更加分散,局部放电信号幅值逐渐减小且更加紧密;与脉宽为1 μs的情况相比,脉宽为500 ns时局部放电信号幅值更大且放电时延更小。该结果可为高压大功率电力电子装置中固态开关的绝缘老化和状态监测提供重要科学依据。

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Effects of broadband high-voltage pulse parameters on the partial discharge characteristics of polyimide film
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    Abstract:

    To understand the partial discharge characteristics of the insulating material of high-voltage insulated gate bipolar transistor (IGBT) devices under the impact of the broadband pulse electric stress,a platform for partial discharge measurement is established. The effects of voltage amplitude,pulse repetition frequency,rising edge time and pulse width on the partial discharge characteristics of polyimide film are systematically studied. The results show that as the voltage amplitude increases from 3 kV to 11 kV,the amplitude of the partial discharge signal at the rising edge of the pulse increases,while the discharge delay decreases. When the pulse repetition frequency increases from 50 Hz to 100 kHz,the discharge delay of the rising edge increases but the amplitude of local amplified signal keeps almost unchanged. When rising edge time increases from 136 ns to 300 ns,the discharge delay increases and becomes more dispersed,and the amplitude of the partial discharge signal gradually decreases. Compared to the case of the pulse width of 1 μs,the amplitude of the partial discharge signal becomes larger and the discharge delay becomes smaller in the case of the pulse width of 500 ns. This result provides an important scientific basis for the insulation aging and condition monitoring of solid-state switches in high-voltage high-power electronic devices.

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刘畅,卞伟杰,张兴,顾亚楠,吴淑群,张潮海.宽频高压脉冲参数对聚酰亚胺薄膜局部放电特性的影响[J].电力工程技术,2021,40(5):121-127

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  • 收稿日期:2021-02-23
  • 最后修改日期:2021-05-07
  • 录用日期:2020-08-04
  • 在线发布日期: 2021-09-30
  • 出版日期: 2021-09-28