scholarly journals On-line Monitoring Device for High-voltage Switch Cabinet Partial Discharge Based on Pulse Current Method

2017 ◽  
Vol 281 ◽  
pp. 012021
Author(s):  
S Y Tao ◽  
X Z Zhang ◽  
H W Cai ◽  
P Li ◽  
Y Feng ◽  
...  
Keyword(s):  
High Voltage ◽  
Pulse Current ◽  
Partial Discharge ◽  
Current Method ◽  
Monitoring Device ◽  
On Line

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.

The Necessity of Intelligent Transformer On-Line Monitoring Configuration Analysis

2013 ◽  
Vol 427-429 ◽  
pp. 1297-1300
Author(s):  
Lu Lu Yuan ◽  
Zhu Yuan ◽  
Wei Wei Zhang
Keyword(s):  
Gas Chromatography ◽  
Optical Fiber ◽  
Temperature Measurement ◽  
Real Time ◽  
Online Monitoring ◽  
Pulse Current ◽  
Partial Discharge ◽  
Current Method ◽  
On Line ◽  
Fiber Winding

Intelligent transformer as an important part of intelligent substation, can be flexible and controllable and can real-time monitoring, protection, control transformer normally. online monitoring is the guarantee of realization of intelligent transformer, Partial discharge on-line monitoring optical fiber temperature measurement, casing medium on-line monitoring, winding on-line monitoring are the most important three aspects. The commonly used methods of Partial discharge on-line monitoring, a pulse current method, UFH method, gas chromatography, and ultrasound. The analysis of necessity of the main transformer partial discharge on-line monitoring configuration, and the fiber winding temperature online monitoring configuration.

signals, namely the measurement of the partial dis-charge pulse current. The Roche coil works in mag-netic coupling, and the detecting circuit and the high-voltage circuit has no direct contact, so it is very suitable for the partial discharge site inspection in the high-voltage switchgear. 3 APPLICATION OF HIGH-FREQUENCY PULSE CURRENT SENSOR IN THE WAIST STATION FOR 35 KV SWITCH CABINET A 220 KV waist station is located on a hill, which is far from about 2 km to the north of Yang street , 4 DATA DETECTION AND ANALYSIS OF Lufeng town, Lufeng country of Chuxiong city , alti-SWITCHGEAR HIGH FREQUENCY FOR tude 1923 km, which covers an area of 22876 m PARTIAL DISCHARGE and put into production on December 25, 2009. It is one of the most important substation of Chuxiong During the 2-month testing for the Chuxiong waist Lufeng area. The main power source is supplied by station , we selected the data from April 23 to May 220 KV and 500 KV peace waist I changed back 25 in 2014 for effective analysis, and found that the line, 220 kV and waist II loop power. current data of the eight high-frequency pulse cur-rent sensor is normal, so we selected three sensor

2015 ◽  
pp. 71-73
Keyword(s):  
High Voltage ◽  
High Frequency ◽  
Direct Contact ◽  
Pulse Current ◽  
Partial Discharge ◽  
Current Data ◽  
Data Detection ◽  
The North ◽  
Effective Analysis ◽  
Frequency Pulse

scholarly journals An Improved Partial Discharge Detection System Based on UV Pulses Detection

Sensors ◽  
2020 ◽  
Vol 20 (17) ◽  
pp. 4767
Author(s):  
Zeliang Shen ◽  
Jingang Wang ◽  
Gang Wei
Keyword(s):  
High Precision ◽  
Reliable Method ◽  
Pulse Current ◽  
Detection System ◽  
Partial Discharge ◽  
Current Method ◽  
Pulse Method ◽  
Early Discharge ◽  
Effective Distance ◽  
Pulse Detection

Partial discharge (PD) usually reflects failures and potential hazards of equipment, so PD detection is important to protect the power system. The most reliable method now is the pulse current method (PCM), but the device of PCM is large and hard to carry. Ultraviolet (UV) pulse detection is another method to detect PD, which has a high precision, strong anti-interference ability, and a long effective distance. However, the existing detection system does not work well when the PD is weak and can hardly reflect the hidden trouble of equipment. This paper introduces an improved PD detection system, based on the UV Pulse Method, which is of high precision and can reflect early discharge. In this study, a corresponding detection device was also built. This device is handheld, non-contact, easy to use, and of high precision.

Functions and Theoretical Basis of Partial Discharge On-Line Monitoring System for High-Voltage Cables

2014 ◽  
Vol 672-674 ◽  
pp. 854-857
Author(s):  
Dan Pang ◽  
Xi Lin Zhang ◽  
Zhen Hao Wang ◽  
Dan Zhang ◽  
Xiao Juan Han
Keyword(s):  
High Voltage ◽  
Partial Discharge ◽  
Diagnostic System ◽  
Signal Acquisition ◽  
Xlpe Cable ◽  
Remote Diagnostics ◽  
Testing Technology ◽  
Discharge Status ◽  
On Line ◽  
Frequency Current

A partial discharge (PD) on-line monitoring and positioning system for high-voltage cables based on double-ended testing technology is developed. The hardware of this system includes a high-frequency current sensor, site PD signal acquisition and PD monitoring server. In order to achieve real-time monitoring and remote diagnostics of the XLPE cable partial discharge status, the designed software system is divided into front-end control system and remote diagnostic system. And finally, the correctness and effectiveness of the system is verified by XLPE cable partial discharge testing.

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