Current Detection Methods of Partial Discharge for Distribution Network Switchgear

2014 ◽  
Vol 521 ◽  
pp. 313-316
Author(s):  
Yu Sheng Quan ◽  
Lin Jie Fang ◽  
Yan Wu ◽  
Zi Jian Wang
Keyword(s):  
Electromagnetic Wave ◽  
High Frequency ◽  
Partial Discharge ◽  
Outer Wall ◽  
Detection Methods ◽  
Total Current ◽  
Current Signal ◽  
Current Detection ◽  
Ground Line ◽  
Frequency Current

There are many factors that can lead to partial discharge in the internal of switchgear. High-frequency current will be generated on the inner wall of switchgear when the electromagnetic wave generated by partial discharge reaches the enclosure of switchgear. In the same way, more complex current signal will be produced on the outer wall of the switchgear because of the electromagnetic radiation outside the enclosure. These two currents will flow to earth through the switchgear ground wire. We can determine whether the switchgear exist partial discharge and the severity of the partial discharge by comparing the current flowing through the outer wall and the total current flowing through the ground line.

Parameters Identification and Modeling of High-Frequency Current Transducer for Partial Discharge Measurements

2013 ◽  
Vol 13 (3) ◽  
pp. 1081-1091 ◽  
Author(s):  
Muhammad Shafiq ◽  
Lauri Kutt ◽  
Matti Lehtonen ◽  
Tatu Nieminen ◽  
Murtaza Hashmi
Keyword(s):  
High Frequency ◽  
Partial Discharge ◽  
Parameters Identification ◽  
High Frequency Current ◽  
Current Transducer ◽  
Discharge Measurements ◽  
Frequency Current

scholarly journals KARAKTERISTIK SURFACE PARTIAL DISCHARGE DI SEKITAR ANTARMUKA PCB PADA PELAT-PELAT ELEKRODA PADA ISOLASI UDARA DAN MINYAK

2020 ◽  
Vol 6 (2) ◽  
pp. 65-73 ◽  
Author(s):  
Neris Peri Ardiansyah ◽  
Resa Pramudita
Keyword(s):  
High Frequency ◽  
Partial Discharge ◽  
Current Transformer ◽  
Surface Discharge ◽  
High Frequency Current ◽  
Inception Voltage ◽  
Frequency Current

Penggunaan peralatan tegangan tinggi pada konverter elektronik daya atau modul daya memiliki pengaruh terhadap sistem isolasi peralatan yang digunakan. Efek yang dihasilkan adalah pelepasan sebagian atau partial discharge (PD), dimana hal tersebut depengaruhi oleh bentuk tegangan, yang mana fenomena PD ini adalah awal mula terjadinya kegagalan dalam suatu peralatan. Pada penelitian ini dilakukan Pengukuran PD dengan mengacu pada Standar IEC 60270 yang menggunakan metode elektrik sebagai pengukuran yang digunakan untuk pengujian PD pada bahan PCB dengan alat ukur yang digunakan adalah RC detektor dan High Frequency Current Transformer (HFCT). Pengukuran PD dilakukan dengan membuat model elektroda yang digunakan pada pengujian untuk membuat sumber PD. Elektroda yang digunakan adalah model elektroda Homogen pelat-pelat. Pengujian pada PCB dilakukan untuk mengetahui karakteristik surface discharge pada disekitar antarmuka pelat-pelat elektroda. Parameter yang digunakan dalam pengukuran yaitu Partial Discharge Inception Voltage (PDIV), Partial Discharge Extinction Voltage (PDEV), Bentuk Gelombang PD, dan Pola Phasa PD.

scholarly journals Wideband UHF Antenna for Partial Discharge Detection

2020 ◽  
Vol 10 (5) ◽  
pp. 1698
Author(s):  
Zhen Cui ◽  
Seungyong Park ◽  
Hosung Choo ◽  
Kyung-Young Jung
Keyword(s):  
Frequency Response ◽  
High Frequency ◽  
Near Field ◽  
Partial Discharge ◽  
Current Transformer ◽  
Impedance Bandwidth ◽  
Field Coupling ◽  
Frequency Detection ◽  
Frequency Current ◽  
Uhf Antenna

This paper presents a ultra-high frequency (UHF) antenna for partial discharge (PD) detection and the antenna sensor can be used near a conducting ground wire. The proposed UHF antenna has advantages of easy setup and higher-frequency detection over the high-frequency current transformer (HFCT) sensor. First, a variety of loop-shaped antennas are designed to compare each near field coupling capability. Then, a new UHF antenna is designed based on the loop-shaped antenna, which has the best near field coupling capability. Finally, the proposed UHF antenna is fabricated and measured. It provides a wide impedance bandwidth of 760 MHz (740–1500 MHz). Its simple setup configuration and wide bandwidth frequency response in the UHF band can provide a more efficient means for PD detection.

scholarly journals Partial Discharge Analysis in High-Frequency Transformer Based on High-Frequency Current Transducer

Energies ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1997 ◽  
Author(s):  
Jun Jiang ◽  
Mingxin Zhao ◽  
Chaohai Zhang ◽  
Min Chen ◽  
Haojun Liu ◽  
...  
Keyword(s):  
High Frequency ◽  
Partial Discharge ◽  
Phase Region ◽  
High Frequency Current ◽  
System A ◽  
Mode Decomposition ◽  
Current Transducer ◽  
Core Components ◽  
Set Up ◽  
Frequency Current

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.

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