scholarly journals Principles of Charge Estimation Methods Using High-Frequency Current Transformer Sensors in Partial Discharge Measurements

Sensors ◽  
2020 ◽  
Vol 20 (9) ◽  
pp. 2520 ◽  
Author(s):  
Armando Rodrigo-Mor ◽  
Fabio A. Muñoz ◽  
Luis Carlos Castro-Heredia
Keyword(s):  
Frequency Response ◽  
High Frequency ◽  
Current Transformer ◽  
Estimation Methods ◽  
High Frequency Current ◽  
Measured Voltage ◽  
Time Integral ◽  
Double Time ◽  
Flat Frequency Response ◽  
Frequency Current

This paper describes a simplified model and a generic model of high-frequency current transformer (HFCT) sensors. By analyzing the models, a universal charge estimation method based on the double time integral of the measured voltage is inferred. The method is demonstrated to be valid irrespective of HFCT sensor, assuming that its transfer function can be modelled as a combination of real zeros and poles. This paper describes the mathematical foundation of the method and its particularities when applied to measure nanosecond current pulses. In practice, the applicability of the method is subjected to the characteristics and frequency response of the sensor and the current pulse duration. Therefore, a proposal to use the double time integral or the simple time integral of the measured voltage is described depending upon the sensor response. The procedures used to obtain the respective calibration constants based on the frequency response of the HFCT sensors are explained. Two examples, one using a HFCT sensor with a broadband flat frequency response and another using a HFCT sensor with a non-flat frequency response, are presented.

scholarly journals Erratum: Rodrigo-Mor et al. Principles of Charge Estimation Methods Using High-Frequency Current Transformer Sensors in Partial Discharge Measurements. Sensors 2020, 20, 2520

Sensors ◽  
2021 ◽  
Vol 21 (18) ◽  
pp. 6010
Author(s):  
Armando Rodrigo-Mor ◽  
Fabio A. Muñoz ◽  
Luis Carlos Castro-Heredia
Keyword(s):  
High Frequency ◽  
Partial Discharge ◽  
Current Transformer ◽  
Estimation Methods ◽  
High Frequency Current ◽  
Discharge Measurements ◽  
Frequency Current

The authors wish to make the following erratum to this paper [...]

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 Identification and Location of PD Defects in Medium voltage Underground Power Cables Using High Frequency Current Transformer

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 103608-103618 ◽  
Author(s):  
Muhammad Shafiq ◽  
Ivar Kiitam ◽  
Paul Taklaja ◽  
Lauri Kutt ◽  
Kimmo Kauhaniemi ◽  
...  
Keyword(s):  
High Frequency ◽  
Current Transformer ◽  
Power Cables ◽  
High Frequency Current ◽  
Medium Voltage ◽  
Underground Power Cables ◽  
Frequency Current
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