Application of On-Line Ultrasonic and UHF Partial Discharge Detection in 1000kV GIS

2014 ◽  
Vol 644-650 ◽  
pp. 3480-3484 ◽  
Author(s):  
Fuan Chen ◽  
Hui Zeng Tang ◽  
Hong Gang Li
Keyword(s):  
High Voltage ◽  
High Frequency ◽  
Detection Method ◽  
Ultrasonic Method ◽  
Partial Discharge ◽  
Joint Detection ◽  
Frequency Method ◽  
Advantages And Disadvantages ◽  
On Line ◽  
Discharge Detection

This paper introduces the detecting principle、range of application and interferencerejection of Ultrasonic And UHF Partial Discharge Detection In GIS(Gas Insulated Switchgear).In view of the advantages and disadvantages of ultrasonic and UHF detection,this paper proposesa quick joint detection method, which uses UHF (Ultra High Frequency) method to online detectthe suspected discharge range in real time, adopts ultrasonic method to determine the specificdischarge points, finally through a concrete instance in a 1000KV UHV(Ultra High Voltage)Substation verified the feasibility of the joint detection method.

scholarly journals Comparison of Low and High Frequency Partial Discharge Measurements on Stator Windings

2019 ◽  
pp. 134-138
Author(s):  
Greg C Stone ◽  
Howard Sedding
Keyword(s):  
High Frequency ◽  
Partial Discharge ◽  
Low Frequency ◽  
International Standards ◽  
Very High Frequency ◽  
Stator Windings ◽  
Advantages And Disadvantages ◽  
On Line ◽  
Winding Insulation

Partial discharge (PD) testing has been used for over 60 years primarily as a method to assess condition of the stator winding insulation in motors and generators rated 6 kV and above. More recently it has also been used by some machine manufacturers as a means of assuring the quality of the insulation on single winding elements (coils and bars). Although both on-line and off-line tests mainly use a high voltage capacitor to detect the PD, the PD measuring systems in use work either in the low frequency (LF) regime (less than about 1 MHz) or in the very high frequency (VHF) (30-300 MHz) range. By reference to several international standards, published work as well as some experiments described in this contribution, the advantages and disadvantages of the two approaches are compared. Based on this work, it is now clear that off-line PD tests should be done in the LF range. For on-line tests, either method may be used, but use of the VHF method has become more widespread with machine end users, since the owners themselves can perform and interpret the results with a relatively low risk of false indications.

Development of GIS Partial Discharge Detection System Based on the New UHF Sensor Combination of Switchgear

2014 ◽  
Vol 635-637 ◽  
pp. 666-669 ◽  
Author(s):  
Bo Chen
Keyword(s):  
Power Supply ◽  
High Frequency ◽  
Detection System ◽  
Partial Discharge ◽  
Ultra High Frequency ◽  
Detection Techniques ◽  
Advantages And Disadvantages ◽  
Frequency Sensor ◽  
Discharge Detection

In order to ensure power supply reliability and reduce a variety of power supply failure, we analyze the development status, advantages and disadvantages of partial discharge detection techniques about the various Gas -insulated Metal-enclosed Swith Gear (GIS). We put forward the application of ultra high frequency (UHF) technology for GIS partial discharge online monitoring technology methods to solve the problems of the difference of the pulse current method of anti-interference ability and ultrasonic sensitivity the problem of low. According to the deficiency of the traditional ultra high frequency sensor, we developed a new window type of ultra high frequency sensor, and compared with conventional in vitro type UHF sensor. Experimental results show that that the window-type UHF sensor sensitivity and anti-jamming capability are superior to conventional high-frequency sensor

scholarly journals Modeling of High-Frequency Current Transformer Based Partial Discharge Detection in High-Voltage Cables

2019 ◽  
Vol 34 (4) ◽  
pp. 1549-1556 ◽  
Author(s):  
Xiao Hu ◽  
Wah Hoon Siew ◽  
Martin D. Judd ◽  
Alistair J. Reid ◽  
Bojie Sheng
Keyword(s):  
High Voltage ◽  
High Frequency ◽  
Partial Discharge ◽  
Current Transformer ◽  
High Frequency Current ◽  
Frequency Current ◽  
Discharge Detection
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