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首页> 外文会议>2014 IEEE 18th International Conference on Dielectric Liquids >Experimental investigations of improved dielectric condition monitoring methods on transformer oil-paper insulation system
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Experimental investigations of improved dielectric condition monitoring methods on transformer oil-paper insulation system

机译：变压器油纸绝缘系统介电状态监测方法改进的实验研究

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Frequency Domain Spectroscopy (FDS) is successfully being used to assess the insulation condition of oil filled power transformers. However, it has to date only been implemented on de-energized transformers, which requires the transformers to be shut down for an extended period which can result in significant costs. To solve this issue, a method of implementing FDS under energized condition is proposed here. A chirp excitation waveform is used to replace the conventional sinusoidal waveform to reduce the measurement time in this method. Investigation of the dielectric response under the influence of a high voltage stress at power frequency is reported based on experimental results. To further understand the insulation ageing process, the geometric capacitance effect is removed to enhance the detection of the ageing signature. This enhancement enables the imaginary part of admittance to be used as a new indicator to assess the ageing status of the insulation.
机译：频域光谱法（FDS）已成功用于评估注油电力变压器的绝缘状况。然而，迄今为止，它仅在断电的变压器上实施，这要求将变压器关闭较长时间，这可能会导致大量成本。为了解决这个问题，本文提出了一种在通电条件下实现FDS的方法。在这种方法中，使用线性调频激励波形代替常规的正弦波形，以减少测量时间。基于实验结果，报告了在电源频率下高压应力影响下的介电响应的研究。为了进一步了解绝缘老化过程，去除了几何电容效应以增强对老化特征的检测。这种增强使导纳的虚部可用作评估绝缘层老化状态的新指标。

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