聚丙烯在直流极性反转下的表征

2019 IEEE 4th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON) Pub Date : 2019-11-01 DOI:10.1109/CATCON47128.2019.CN0064

B. S, S. Usa

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引用次数: 2

摘要

除了直流应力外，普通的高压直流绝缘还会受到直流极性反转(DC- pr)的影响。DC-PR用于反向传输功率。DC-PR也用于清除极故障。据报道，直流- pr会导致高压直流绝缘系统的介电强度降低。下面的研究揭示了聚丙烯(PP)的DC-PR击穿特性。构建了一个DC-PR发生器，用于产生CIGRE (WG-B4.51)定义的±11kV DC-PR波形。在500ms和1.68ms两种不同的反转时间下，获得了PP(23µm厚度)的DC-PR击穿特性。研究了反转时间对击穿特性的影响。研究了反转类型(即从正直流电转变为负直流电，反之亦然)的影响。样品经受标准交流、直流和开关脉冲(SI)击穿试验进行比较。分析了电压变化率对击穿特性的影响。

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Characterization of Polypropylene under DC-Polarity Reversal

In addition to DC stress, common HVDC insulations are subjected to DC Polarity Reversals (DC-PR). DC-PR is used to reverse the direction of power transfer. DC-PR is also used to clear pole faults. It is reported that DC-PR causes reduction in dielectric strength of HVDC insulation systems. The following study reveals the DC-PR breakdown characteristics of polypropylene (PP). A DC-PR generator is constructed to generate the CIGRE (WG-B4.51) defined DC-PR waveform at ±11kV. DC-PR breakdown characteristics of PP (23µm thickness) is obtained for two different reversal times, 500ms and 1.68ms respectively. The effect of reversal time on the breakdown characteristics is studied. The effect of type of reversal (i.e. transition from positive DC to negative DC and vice-versa) is studied. The sample is subjected to standard AC, DC and switching impulse (SI) breakdown tests for comparison. The effect of rate of change of voltage on the breakdown characteristics is analyzed.

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来源期刊

2019 IEEE 4th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)

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