Fault location method based on edge detection for low SNR traveling waves

2021 ◽  
Vol 201 ◽  
pp. 107505
Author(s):  
She Wang ◽  
Chijie Zhuang ◽  
Yinan Geng ◽  
Tingting Wang ◽  
Bin Luo ◽  
...  
Keyword(s):  
Edge Detection ◽  
Traveling Waves ◽  
Fault Location ◽  
Location Method ◽  
Low Snr

Research on Electrical Engineering with a New Fault Location Method of Double Terminal Based on HHT

2014 ◽  
Vol 1003 ◽  
pp. 124-129
Author(s):  
Jian Xu Lu ◽  
Cheng Jia Ma
Keyword(s):  
Wave Velocity ◽  
Traveling Waves ◽  
Fault Location ◽  
Arrival Time ◽  
Location Method ◽  
Hilbert Huang Transform ◽  
Simulation Results ◽  
Location Methods ◽  
Second Wave ◽  
Wave Arrival

Among the available fault location methods based on traveling waves, calibrations of wave velocity and wave arrival time are the two main problems. This paper proposes a new fault location method which combines the two problems mentioned above. In this method, the first wave and second wave obtained at one side and the first wave obtained at the other side is used to locate the fault point. And the Hilbert-Huang transform is used in the calibration of wave arrival time, making the method more accurate than using wavelet transform. This method has the following two advantages: At first, it dismisses the influence of wave velocity. In the second, it doesn’t need to distinguish the sources of the received waves. ATP-EMTP’s simulation results show that this method is available and the location precision is higher than traditional fault location methods.

Fault Location Method in Power Network by Applying Accurate Information of Arrival Time Differences of Modal Traveling Waves

2020 ◽  
Vol 16 (5) ◽  
pp. 3124-3132 ◽  
Author(s):  
Rui Liang ◽  
Nan Peng ◽  
Lutian Zhou ◽  
Xiangzhen Meng ◽  
Yihua Hu ◽  
...  
Keyword(s):  
Traveling Waves ◽  
Fault Location ◽  
Arrival Time ◽  
Accurate Information ◽  
Power Network ◽  
Location Method

scholarly journals A Novel Fault Location Method for Power Cables Based on an Unsupervised Learning Algorithm

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 1164
Author(s):  
Mingzhen Li ◽  
Jialong Bu ◽  
Yupeng Song ◽  
Zhongyi Pu ◽  
Yuli Wang ◽  
...  
Keyword(s):  
Unsupervised Learning ◽  
Traveling Waves ◽  
Traveling Wave ◽  
Computer Aided Design ◽  
Fault Location ◽  
Arrival Time ◽  
Short Circuit ◽  
Power Cable ◽  
Density Level ◽  
Location Method

In order to locate the short-circuit fault in power cable systems accurately and in a timely manner, a novel fault location method based on traveling waves is proposed, which has been improved by unsupervised learning algorithms. There are three main steps of the method: (1) build a matrix of the traveling waves associated with the sheath currents of the cables; (2) cluster the data in the matrix according to its density level and the stability, using Hierarchical Density-Based Spatial Clustering of Applications with Noise (HDBSCAN); (3) search for the characteristic cluster point(s) of the two branch clusters with the smallest density level to identify the arrival time of the traveling wave. The main improvement is that high-dimensional data can be directly used for the clustering, making the method more effective and accurate. A Power System Computer Aided Design (PSCAD) simulation has been carried out for typical power cable circuits. The results indicate that the hierarchical structure of the condensed cluster tree corresponds exactly to the location relationship between the fault point and the monitoring point. The proposed method can be used for the identification of the arrival time of the traveling wave.

A Novel Fault-location Method for HVDC Transmission Lines Based on Concentric Relaxation Principle and Wavelet Packet

2020 ◽  
Vol 13 (5) ◽  
pp. 705-716
Author(s):  
Congshan Li ◽  
Ping He ◽  
Feng Wang ◽  
Cunxiang Yang ◽  
Yukun Tao ◽  
...  
Keyword(s):  
Transmission Lines ◽  
Traveling Wave ◽  
Fault Location ◽  
Wave Attenuation ◽  
Wavelet Packet ◽  
Low Frequency ◽  
Evaluation Process ◽  
Location Method ◽  
Hvdc Transmission ◽  
Instantaneous Energy

Background: A novel fault location method of HVDC transmission line based on a concentric relaxation principle is proposed in this paper. Methods: Due to the different position of fault, the instantaneous energy measured from rectifier and inverter are different, and the ratio k between them is the relationship to the fault location d. Through the analysis of amplitude-frequency characteristics, we found that the wave attenuation characteristic of low frequency in the traveling wave is stable, and the amplitude of energy is larger, so we get the instantaneous energy ratio by using the low-frequency data. By using the method of wavelet packet decomposition, the voltage traveling wave signal was decomposed. Results: Finally, calculate the value k. By using the data fitting, the relative function of k and d can be got, that is the fault location function. Conclusion: After an exhaustive evaluation process considering different fault locations, fault resistances, and noise on the unipolar DC transmission system, four-machine two-area AC/DC parallel system, and an actual complex grid, the method presented here showed a very accurate and robust behavior.

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