Overvoltages under asymmetrical condition on very high voltage overhead transmission lines

1999 ◽  
Author(s):  
S. Ioan
Keyword(s):  
High Voltage ◽  
Transmission Lines ◽  
Overhead Transmission Lines ◽  
Asymmetrical Condition ◽  
Very High

RFID-indicators for polymer stick insulators

2020 ◽  
pp. 82-88
Author(s):  
Tatyana Anatolyevna Nesenyuk ◽  
◽  
Ekaterina Evgenyevna Poluyanova ◽  
Keyword(s):  
High Voltage ◽  
Transmission Lines ◽  
Electrical Power ◽  
Power Engineering ◽  
Rfid Technology ◽  
Rfid Tag ◽  
Overhead Transmission Lines ◽  
Polymer Insulator ◽  
Technical Control

The paper is devoted to the use of RFID-technology in electrical power engineering, in particular, for controlling the condition of high-voltage equipment of feeding transmission lines. It also describes studies on development of RFID-tag designed to indicate dielectric condition of line polymer insulator. The authors present results of tests of pilot samples of LKi-70/110-4-GP-UKhL1 polymer stick insulators with built-in RFID-indicators. The tests have been executed in accordance with the GOST R 55189-2012 requirements. As a result, the authors have made a conclusion on the possibility of using RFID-technologies for technical control of insulators on overhead transmission lines, high-voltage equipment of traction and transformer substations.

Lightning Overvoltage Analysis and Calculation of 330kV Overhead Transmission Line

2014 ◽  
Vol 556-562 ◽  
pp. 1588-1591
Author(s):  
Xiu Bin Zhang ◽  
Ding Jun Wen ◽  
Ya Ming Sun ◽  
Hong Gang Chen
Keyword(s):  
Transmission Line ◽  
Equivalent Circuit ◽  
High Voltage ◽  
Transmission Lines ◽  
Equivalent Circuit Model ◽  
Voltage Level ◽  
High Voltage Transmission Line ◽  
Overhead Transmission Line ◽  
Overhead Transmission Lines ◽  
Pollution Flashover

Lighting is one of the important reasons of transmission line trip accident. For 330kV and above ultra high voltage transmission line, lighting flashover more frequently occur. To reduce tripping rate effectively and fundamentally, lightning over voltage level should be analyzed besides anti-pollution flashover. In this paper, a simplified equivalent circuit model of a 330kV overhead transmission lines is established. The lightning over voltage of the transmission is analyzed and calculated. Method to reduce the lightning overvoltage is discussed.

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