Online monitoring of partial discharge in high voltage switchgear using a differential electric field sensor

2017 ◽  
Author(s):  
Xiaoming Zeng ◽  
Hongjie Li ◽  
Yuxin Lu ◽  
Yufei Chen
Keyword(s):  
Electric Field ◽  
High Voltage ◽  
Online Monitoring ◽  
Partial Discharge ◽  
Electric Field Sensor ◽  
Field Sensor

scholarly journals Application of Integrated Optical Electric-Field Sensor on the Measurements of Transient Voltages in AC High-Voltage Power Grids

2019 ◽  
Vol 9 (9) ◽  
pp. 1951
Author(s):  
Shijun Xie ◽  
Yu Zhang ◽  
Huaiyuan Yang ◽  
Hao Yu ◽  
Zhou Mu ◽  
...  
Keyword(s):  
Electric Field ◽  
High Voltage ◽  
Power Grid ◽  
Response Speed ◽  
Measuring System ◽  
Pockels Effect ◽  
Electric Field Sensor ◽  
Integrated Optical ◽  
Field Sensor ◽  
Transient Voltages

Transient voltages in the power grid are the key for the fault analysis of a power grid, optimized insulation design, and the standardization of the high-voltage testing method. The traditional measuring equipment, based on electrical engineering, normally has a limited bandwidth and response speed, which are also featured by a huge size and heavy weight. In this paper, an integrated optical electric-field sensor based on the Pockels effect was developed and applied to measure the transient voltages on the high-voltage conductors in a non-contact measuring mode. The measuring system has a response speed faster than 6 ns and a wide bandwidth ranging from 5 Hz to 100 MHz. Moreover, the sensors have the dimensions of 18 mm by 18 mm by 48 mm and a light weight of dozens of grams. The measuring systems were employed to monitor the lightning transient voltages on a 220 kV overhead transmission line. The switching transient voltages were also measured by the measuring system during the commissioning of the 500 kV middle Tibet power grid. In 2017, 307 lightning transient voltages caused by induction stroke were recorded. The characteristics of these voltage waveforms are different from the standard lightning impulse voltage proposed by IEC standards. Three types of typical switching transient voltage in 500 kV AC power grid were measured, and the peak values of these overvoltages can reach 1.73 times rated voltage.

scholarly journals Generating High Voltage DC with Cockcroft-Walton Voltage Multiplier for Testing Locally Assemble Electric Field Sensor

2019 ◽  
Vol 518 ◽  
pp. 042019
Author(s):  
Dalya H. Al-Mamoori ◽  
Omar Muhammed Neda ◽  
Zaid H. Al-Tameemi ◽  
Ali Assim Alobaidi ◽  
Mohanad Aljanabi
Keyword(s):  
Electric Field ◽  
High Voltage ◽  
Voltage Multiplier ◽  
Electric Field Sensor ◽  
Field Sensor

Design and Test of an Electric Field Sensor for the Measurement of High-Voltage Nanosecond Pulses

2013 ◽  
Vol 41 (10) ◽  
pp. 2946-2950 ◽  
Author(s):  
Soo Won Lim ◽  
Chuhyun Cho ◽  
Yun Sik Jin ◽  
Young Bae Kim ◽  
Youngsu Roh
Keyword(s):  
Electric Field ◽  
High Voltage ◽  
Electric Field Sensor ◽  
Nanosecond Pulses ◽  
Field Sensor

scholarly journals Surface-Integrated Electric Field Sensor for the Detection of High-Voltage Power Lines

Sensors ◽  
2021 ◽  
Vol 21 (24) ◽  
pp. 8327
Author(s):  
Gunbok Lee ◽  
Jeong-Yeon Kim ◽  
Gildong Kim ◽  
Jae Hee Kim
Keyword(s):  
Electric Field ◽  
Electric Fields ◽  
High Voltage ◽  
Strong Electric Field ◽  
The Body ◽  
Power Lines ◽  
Induced Voltage ◽  
Electric Field Sensor ◽  
Field Sensor ◽  
High Voltage Power Lines

When a drone is used for inspection of facilities, there are often cases in which high-voltage power lines interfere, resulting in the drone being caught or falling. To prevent this type of incident, drones must be capable of detecting high-voltage power lines. Typically, a strong electric field is formed around the high-voltage lines. To detect the electric fields around high-voltage lines, this study proposes an electric field sensor that may be integrated within the body of a drone. In a laboratory environment, a voltage of 25 kV was applied to an overhead line, and the induced voltage in the proposed sensor was measured at various electric field intensities. Over an electric field range of 0.5 to 10.1 kV/m, a voltage of 0 to 0.77 V was measured with each proposed sensor. In addition, the electric field and the voltage induced in the sensor were measured in a real-world railway environment with overhead lines. Under these conditions, the proposed sensor has the compensated value of 4.5 when the measured electric field was 4.05 kV/m. Therefore, the proposed sensor may be applied in drones to measure large electric fields and to detect the presence of high-voltage lines in its vicinity.

New optical fiber high-voltage electric field sensor

1999 ◽  
Author(s):  
Kaicheng Li ◽  
Miaoyuan Ye ◽  
Jianmei Zhang
Keyword(s):  
Electric Field ◽  
Optical Fiber ◽  
High Voltage ◽  
Electric Field Sensor ◽  
Field Sensor

A MEMS-Based Electric Field Sensor for Measurement of High-Voltage DC Synthetic Fields in Air

2017 ◽  
Vol 17 (23) ◽  
pp. 7866-7876 ◽  
Author(s):  
Qing Ma ◽  
Kaitian Huang ◽  
Zhanqing Yu ◽  
Zheyao Wang
Keyword(s):  
Electric Field ◽  
High Voltage ◽  
Electric Field Sensor ◽  
Field Sensor

Transient Response of Electrostatic Field due to Collision ESD between Spherical Electrodes by using Bare-chip Optical Electric Field Sensor

2020 ◽  
Vol 140 (12) ◽  
pp. 599-600
Author(s):  
Kento Kato ◽  
Ken Kawamata ◽  
Shinobu Ishigami ◽  
Ryuji Osawa ◽  
Takeshi Ishida ◽  
...  
Keyword(s):  
Electric Field ◽  
Transient Response ◽  
Electrostatic Field ◽  
Electric Field Sensor ◽  
Field Sensor

scholarly journals Device for online monitoring of insulation faults in high-voltage switchgears

2021 ◽  
Vol 17 (2) ◽  
pp. 155014772199928
Author(s):  
Jiajia Song ◽  
Jinbo Zhang ◽  
Xinnan Fan
Keyword(s):  
Fourier Transform ◽  
High Voltage ◽  
Online Monitoring ◽  
Pulse Current ◽  
Partial Discharge ◽  
Current Method ◽  
Capacitive Sensor ◽  
Accurate Diagnosis ◽  
Partial Discharges ◽  
Urgent Problem

Partial discharges are the major cause of deterioration in the insulation characteristics of switchgears. Therefore, timely detection of partial discharge in switchgear and potential insulation faults is an urgent problem that needs to be addressed in the power supervision industry. In this study, a device was proposed for online monitoring of high-voltage switchgears based on pulse current method and ozone (O3) detection. The pulse current method obtains the PD signal by monitoring the phase holes on the switch indicator. Occurrence of a partial discharge in a certain phase leads to the production of a discharge pulse, which can be coupled out by a capacitive sensor. The current spectrum and the O3 produced by partial discharge were processed via fast Fourier transform for accurate diagnosis of the occurrence of partial discharge and its severity in switchgears. The proposed method allows for convenient acquisition of the partial discharge signal, simple installation of the device, and realization with inexpensive sensors.

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