The Performance of A High Frequency Current Transducer for Partial Discharge Measurement under Testing with A Power Frequency Converter

Author(s):  
Banyat Leelachariyakul ◽  
Busayapol Paophan ◽  
Punyavee Chaisiri ◽  
Peerawut Yutthagowith
2013 ◽  
Vol 13 (3) ◽  
pp. 1081-1091 ◽  
Author(s):  
Muhammad Shafiq ◽  
Lauri Kutt ◽  
Matti Lehtonen ◽  
Tatu Nieminen ◽  
Murtaza Hashmi

Energies ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1997 ◽  
Author(s):  
Jun Jiang ◽  
Mingxin Zhao ◽  
Chaohai Zhang ◽  
Min Chen ◽  
Haojun Liu ◽  
...  

High-frequency transformers are the core components of power electronic transformers (PET), whose insulation is deeply threatened by high voltage (HV) and high frequency (HF). The partial discharge (PD) test is an effective method to assess an electrical insulation system. A PD measurement platform applying different frequencies was set up in this manuscript. PD signals were acquired with a high-frequency current transducer (HFCT). For improving the signal-to-noise (SNR) ratio of PD pulses, empirical mode decomposition (EMD) was used to increase the SNR by 4 dB. PD characteristic parameters such as partial discharge inception voltage (PDIV) and PD phase, number, and magnitude were all analyzed as frequency dependent. High frequency led to high PDIV and a smaller discharge phase region. PD number and magnitude were first up and then down as the frequency increased. As a result, a suitable frequency for evaluating the insulation of high-frequency transformers is proposed at 8 kHz according to this work.


Kilat ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 53-59
Author(s):  
Andi Junaidi

The lifetime of high voltage equipment is very dependent on the condition of insulation, poor insulation means the life span of high voltage equipment is getting shorter. Partial Discharge is one of the causes of deterioration of high voltage equipment insulation. The ability to know the phenomenon of partial discharge in equipment becomes very important and adds value to the maintenance of high voltage equipment. Many explanations regarding partial discharge, partial discharge is the lack of uniformity of the electric field in the isolation or dielectric media which will result in the phenomenon of Partial Discharge where this will lead to the failure of the isolation media. Partial Discharge that occurs continuously can cause damage (breakdown) on a high voltage equipment. Therefore, before a high voltage device is used, Partial Discharge detection is necessary. Partial Discharge Detection can use the Partial Discharge measurement circuit. In testing partial discharges can be tested using a sensor with various circuits including High Frequency Current Transformers (HFCT) so that this research will discuss one part of the Partial Discharge measurement circuit, the HFCT detector. Hopefully, the HFCT detector can be further developed and can be used for better partial discharge detection.


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