scholarly journals Research on Fault Location of Distribution Lines Based on the Standing Wave Principle

Processes ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 1436
Author(s):  
Sizu Hou ◽  
Xiaoyi Guo
Keyword(s):  
Standing Wave ◽  
Fault Location ◽  
Signal Frequency ◽  
Ground Fault ◽  
Detection Point ◽  
Detection Circuit ◽  
Positioning Method ◽  
Line Theory ◽  
Source Signal ◽  
The Mathematical Model

Aiming at the fast and accurate location of a single-phase ground fault in the distribution network, a single terminal injection signal location method, based on the standing wave principle, is proposed. Firstly, the double conductor standing wave principle formation, based on uniform transmission line theory, is analyzed, and the mathematical model of the fault distance algorithm is established. Secondly, a fault detection circuit is built by simulation, and the distribution trend of the standing wave and its relationship with unit capacitance and unit inductance are studied. By setting the source signal frequency and detection point interval and other parameters, the fault location of this method under direct grounding fault and through grounding resistance fault is simulated and studied. Finally, the fault distance is calculated and located by an experiment. The results show that the positioning accuracy is high, which verifies the effectiveness of the standing wave positioning method.

scholarly journals Single-Line-to-Ground Fault Location in Resonant Grounded Systems Based on Fault Distortions

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Yougen Chen ◽  
Junbo Yin ◽  
Zhiyong Li ◽  
Renyong Wei
Keyword(s):  
Fault Location ◽  
Single Line ◽  
Ground Fault

New On-line Rotor Ground Fault Location Method for Brushless Synchronous Generators

2021 ◽  
Author(s):  
M. A. Pardo ◽  
K. Mahtani ◽  
C. A. Platero ◽  
J. A. Sanchez-Fernandez
Keyword(s):  
Fault Location ◽  
Synchronous Generators ◽  
Location Method ◽  
Ground Fault ◽  
On Line

Research on Single-Phase Grounding Fault in Distribution Networks with a DC Power Positioning Method

2014 ◽  
Vol 530-531 ◽  
pp. 353-356
Author(s):  
Run Sheng Li
Keyword(s):  
Power Distribution ◽  
Single Phase ◽  
Distribution Network ◽  
Distribution Networks ◽  
Power Distribution Network ◽  
Power Outage ◽  
Location Method ◽  
Fault Resistance ◽  
Ground Fault ◽  
Positioning Method

Due to the high ground fault resistance and the complexity of power distribution network structure (such as too many nodes, branches and too long lines), adopting common traveling wave method and ac injection method can not effectively locate the single-phase grounding fault in the distribution network system.To solve above problems and determine the position of the point of failure prisely, this paper adopted the dc location method of injecting the dc signal from the point of failure under the power outage offline. This paper introduces the single phase dc method and the method of three phase dc, and the simulation shows that the dc location method is effective and feasible.

scholarly journals Detection and Location of Earth Fault in MV Feeders Using Screen Earthing Current Measurements

Energies ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1293 ◽  
Author(s):  
Krzysztof Lowczowski ◽  
Jozef Lorenc ◽  
Jozef Zawodniak ◽  
Grzegorz Dombek
Keyword(s):  
Fault Location ◽  
Overhead Lines ◽  
Earth Fault ◽  
Ground Fault ◽  
Detection And Identification ◽  
Zero Sequence ◽  
Network Experiment ◽  
System Configurations ◽  
Zero Sequence Voltage ◽  
Core Current

The paper analyzes the utilization of cable screen currents for earth fault identification and location. Attention is paid on cable and mixed feeders—cable and overhead lines. The principle of operation is based on utilization of 3 criterion values: Ratio of cable screen earthing current and zero sequence cable core current—RF110/15, phase shift between cable screen earthing current and zero sequence cable core current—α and cable screen admittance defined as a ratio of cable screen earthing current and zero sequence voltage—Y0cs. Earth fault location is possible thanks to discovered relation between RF110/15 and α, whereas Y0cs allows for reliable detection of earth faults. Detection and identification are very important because it allows to increase the reliability of supply—reduce downtime and number of consumers affected by the fault. The article presents a phase to ground fault current flow for different power system configurations. At the end solution, which improves location capabilities is proposed. The solution is analyzed in PSCAD software and verified by network experiment.

Ground Fault Location in 2x25 kV High-Speed Train Power Systems by (Auto)Transformers Currents Ratio

2020 ◽  
pp. 1-1
Author(s):  
Carlos A. Platerogaona ◽  
Jesus Serrano ◽  
Jose M. Guerrero ◽  
Alba Fernandez-Horcajuelo
Keyword(s):  
Power Systems ◽  
High Speed ◽  
Fault Location ◽  
High Speed Train ◽  
Ground Fault
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