scholarly journals A Novel Fault Location Approach for Scientific Cabled Seafloor Observatories

2020 ◽  
Vol 8 (3) ◽  
pp. 190 ◽  
Author(s):  
Fan Yang ◽  
Feng Lyu
Keyword(s):  
State Estimation ◽  
Fault Location ◽  
Parameter Variation ◽  
Location Error ◽  
The East China Sea ◽  
Estimation Equations ◽  
Influence Of Temperature On ◽  
On Line ◽  
Location Methods ◽  
Laboratory Prototype

The maintenance of scientific cabled seafloor observatories (CSOs) is not only extremely difficult but also of high cost for their subsea location. Therefore, the cable fault detection and location are essential and must be carried out accurately. For this purpose, a novel on-line fault location approach based on robust state estimation is proposed, considering state data gross errors in sensor measurements and the influence of temperature on system parameter variation. The circuit theory is used to build state estimation equations and identify the power system topology of faulty CSOs. This method can increase the accuracy of fault location, and reduce the lose form shutting down a faulty CSO in traditional fault location methods. It is verified by computer simulation and the laboratory prototype of a planned CSO in the East China Sea, and the fault location error is proved to be less than 1 km.

scholarly journals Research on Transmission Line Fault Location Based on the Fusion of Machine Learning and Artificial Intelligence

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Xiao-Wei Liu
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Traveling Wave ◽  
Fault Location ◽  
Ant Colony Algorithm ◽  
Normal Operation ◽  
Location Error ◽  
Transmission Grid ◽  
Wave Signal ◽  
Location Methods

After a transmission line fails, quickly and accurately find the fault point and deal with it, which is of great significance to maintaining the normal operation of the power system. Aiming at the problems of low accuracy of traditional traveling wave fault location methods and many affected factors, this paper relies on distributed traveling wave monitoring points arranged on transmission lines to study methods to improve the accuracy of traveling wave fault location on transmission lines. First, when a line fails, a traveling wave signal that moves to both ends will be generated and transmitted along the transmission line. We use the Radon transform algorithm to process the traveling wave signal. Then, this paper uses ant colony algorithm to analyze and verify the location and extent of transmission line faults and then optimizes high-precision collection and processing. Finally, the simulation distance measurement is carried out on double-terminal transmission lines and multiterminal transmission lines (T-shaped lines) with branches. The results show that, for double-ended transmission lines, the algorithm increases the speed of matrix calculations and at the same time makes the fault location error of the transmission grid still maintain the improved effect.

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

scholarly journals A Novel Single-Terminal Fault Location Method for AC Transmission Lines in a MMC-HVDC-Based AC/DC Hybrid System

Energies ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 2066 ◽  
Author(s):  
Shimin Xue ◽  
Junchi Lu ◽  
Chong Liu ◽  
Yabing Sun ◽  
Baibing Liu ◽  
...  
Keyword(s):  
Transmission Lines ◽  
Fault Location ◽  
Control Strategies ◽  
Linear Regression Analysis ◽  
Location Method ◽  
Fault Resistance ◽  
Ac Networks ◽  
Minimum Residual ◽  
Ac Transmission ◽  
Location Methods

Accurate and reliable fault location method for alternating current (AC) transmission lines is essential to the fault recovery. MMC-based converter brings exclusive non-linear characteristics to AC networks under single-phase-to-ground faults, thus influencing the performance of the fault location method. Fault characteristics are related to the control strategies of the converter. However, the existing fault location methods do not take the control strategies into account, with further study being required to solve this problem. The influence of the control strategies to the fault compound sequence network is analyzed in this paper first. Then, a unique boundary condition that the fault voltage and negative-sequence fault current merely meet the direct proportion linear relationship at the fault point, is derived. Based on these, a unary linear regression analysis is performed, and the fault can be located according to the minimum residual sum function principle. The effectiveness of the proposed method is verified by PSCAD/EMTDC simulation platform. A large number of simulation results are used to verify the advantages on sampling frequency, fault resistance, and fault distance. More importantly, it provides a higher ranging precision and has extensive applicability.

scholarly journals Data-driven Robust State Estimation Through Off-line Learning and On-line Matching

2021 ◽  
Vol 9 (4) ◽  
pp. 897-909
Author(s):  
Yanbo Chen ◽  
Hao Chen ◽  
Yang Jiao ◽  
Jin Ma ◽  
Yuzhang Lin
Keyword(s):  
State Estimation ◽  
Data Driven ◽  
On Line
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