Partial discharge (PD) detection on medium voltage switchgears using non-invasive sensing methods

Kornhuber, Stefan; Jani, K.; Boltze, Matthias; Valtin, Gerd

doi:10.1109/cmd.2012.6416462

Cited by 4 publications

(1 citation statement)

References 2 publications

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“…Although it has a lower cost compared to power transmission and transformation equipment, its quantity is huge and directly faces customers. Once a fault occurs, it may directly lead to factory power outages, subway outages, and home power outages, causing huge economic losses and also adverse social impacts [1][2]. Therefore, with the increasing demand for power supply reliability in contemporary society, ensuring the safe and reliable operation of MV switchgear is of great significance.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study on Multiple Methods for Partial Discharge Detection of Gap Defect in Medium Voltage Switchgear

Hao,

Zhang,

Liu

et al. 2024

J. Phys.: Conf. Ser.

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The medium voltage switchgear is a key equipment in the distribution network of the power system, which directly faces users. Once a fault occurs, it will cause huge economic losses and adverse social impacts. Partial discharge measurement is an important means to ensure the safe operation of switchgear. The physical quantities measured by different partial discharge detection methods are different, so the detection effects by different methods for the same defect are also different. This paper takes the common internal air gap defects of solid insulation in switchgear as the research object, and conducts partial discharge detection tests on real switchgear equipment. At the same time, radio frequency method, ultrasonic method, transient earth voltage (TEV) method, and pulse current method are used to detect and analyze the partial discharge generated by the defect. The results show that the radio frequency method, TEV method, and pulse current method have good detection sensitivity for air gap defects, but the ultrasonic method cannot detect this type of defect. Comparing the amplitudes of the three electrical signals, it can be found that the correlation between the TEV method and the pulse current method is relatively high, while the correlation between the radio frequency method and the two is relatively low. As the applied voltage increases, the amplitude of the radio frequency method changes linearly, which can more sensitively reflect the degree of defect change.

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Section: Introductionmentioning

confidence: 99%