Secondary Arc Extinguishing During a Single-Phase Fault at the Long High Voltage Overhead Lines - Case Study of a Real Power Network

2021 ◽  
pp. 133-151
Author(s):  
Belmin Memišević ◽  
Mirza Šarić ◽  
Jasna Hivziefendić
Keyword(s):  
High Voltage ◽  
Single Phase ◽  
Power Network ◽  
Real Power ◽  
Overhead Lines

An Analysis of On-Bord High-Voltage Converters of Single-Phase Alternating Current with Increased Miroelectric Power Factor

2020 ◽  
Vol 10 (10) ◽  
pp. 44-51
Author(s):  
Yury Yu. SKOROKHOD ◽  
◽  
Sehgey I. VOL’SKIY ◽  
Keyword(s):  
High Voltage ◽  
Single Phase ◽  
Input Current ◽  
Voltage Converter ◽  
Input Unit ◽  
Power Circuit ◽  
Electrical Systems ◽  
Static Converters ◽  
Technical Requirements

The power circuit arrangements of on-board high-voltage static converters fed from a 3000 V AC single-phase network that in the general case produce multi-channel AC and DC output voltages are considered. The basic technical requirements posed to such converters are formulated. The general structural diagram of high-voltage converters with improved electric power consumption quality is given. Possible power circuit arrangements for the high-voltage converter input unit based on single-phase input current correction devices are considered. A classification and criteria for comparative evaluation of the possible power circuit arrangements of these devices are proposed. The information presented in the article will be of interest for specialists engaged in designing on-board electrical systems involving high-voltage converters that must comply with strict requirements for the quality of consumed single-phase input current.

The Field Test of High Voltage Cable Impedance Parameters

2014 ◽  
Vol 986-987 ◽  
pp. 1682-1684
Author(s):  
Gang Chen ◽  
Qing Hao Wang ◽  
Guo Bin Liu ◽  
Tian Shu Hai ◽  
Bo Liu ◽  
...  
Keyword(s):  
Field Test ◽  
High Voltage ◽  
Single Phase ◽  
Measuring Method ◽  
Theory Analysis ◽  
Zero Sequence ◽  
Impedance Parameters

The cables in 66 kV and 220 kV systems are used in single-phase style, and it must be grounded between the cables. The connection ways between different lengths of cables are in different ways, thus, it may occur influence to circuit parameters, especially to zero sequence impedance. In order to clarify the situation from theory analysis to calculate impedance under all kinds of connection modes, the paper gives an actual cable measured value, and introduces the correct measuring method, together, points out the matters needing attention in the measurement.

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