-
公开(公告)号：US20210156900A1
公开(公告)日：2021-05-27
申请号：US17013881
申请日：2020-09-08
Applicant: Shandong University of Technology
Inventor： Yu Chen , Jinghua Wang , Bingyin Xu , Ke Peng , Wei Wang
Abstract: A method for fault location to single-terminal traveling wave includes steps as follows. Step (a): recording a waveform of a traveling wave signal of disturbance by a traveling wave device when a line disturbance occurs. Step (b): performing a phase mode transformation on the waveform recorded by the step (a), so as to obtain components of line mode and zero mode of a fault initial traveling wave, and performing a wavelet transform to decompose the components of the line mode to obtain singularities in the waveform of the traveling wave. Step (c): calculating a wavefront slope k of the components of the line mode of the fault initial traveling wave. Step (d): computing a preliminary fault distance D according to the slope k computed in the step (c). Step (e): confirming a fault point according to the preliminary fault distance and wavelet singularities of the components of the line mode. Step (f): end.
-
2.发明授权公开(公告)号：US11408924B2
公开(公告)日：2022-08-09
申请号：US17013879
申请日：2020-09-08
Applicant: Shandong University of Technology
Inventor： Yu Chen , Jinghua Wang , Bingyin Xu , Ke Peng , Wei Wang
Abstract: A method for fault location to multi-terminal traveling wave in a direct current distribution line, which belongs to the field of power line fault ranging and location technology. The method includes a main site and a plurality of acquisition points installed into the distribution line and includes steps as follows. Step 1001: collecting and uploading a traveling wave signal by each of the acquisition points after a fault occurs in the line; step 1002: generating a fault record set; step 1003: computing the shortest paths from a central site to other sites and their lengths; step 1004: using expanded two-terminal traveling wave ranging principle for pairing computation; step 1005: converting positions of possible disturbance points into possible disturbance occurrence time points; step 1006: extrapolating from equal path lengths of the possible disturbance points to obtain disturbance time data; and step 1007: determining a final disturbance point.
-
3.发明申请公开(公告)号：US20210156899A1
公开(公告)日：2021-05-27
申请号：US17013879
申请日：2020-09-08
Applicant: Shandong University of Technology
Inventor： Yu Chen , Jinghua Wang , Bingyin Xu , Ke Peng , Wei Wang
Abstract: A method for fault location to multi-terminal traveling wave in a direct current distribution line, which belongs to the field of power line fault ranging and location technology. The method includes a main site and a plurality of acquisition points installed into the distribution line and includes steps as follows. Step 1001: collecting and uploading a traveling wave signal by each of the acquisition points after a fault occurs in the line; step 1002: generating a fault record set; step 1003: computing the shortest paths from a central site to other sites and their lengths; step 1004: using expanded two-terminal traveling wave ranging principle for pairing computation; step 1005: converting positions of possible disturbance points into possible disturbance occurrence time points; step 1006: extrapolating from equal path lengths of the possible disturbance points to obtain disturbance time data; and step 1007: determining a final disturbance point.
-
公开(公告)号：US11307237B2
公开(公告)日：2022-04-19
申请号：US17013881
申请日：2020-09-08
Applicant: Shandong University of Technology
Inventor： Yu Chen , Jinghua Wang , Bingyin Xu , Ke Peng , Wei Wang
Abstract: A method for fault location to single-terminal traveling wave includes steps as follows. Step (a): recording a waveform of a traveling wave signal of disturbance by a traveling wave device when a line disturbance occurs. Step (b): performing a phase mode transformation on the waveform recorded by the step (a), so as to obtain components of line mode and zero mode of a fault initial traveling wave, and performing a wavelet transform to decompose the components of the line mode to obtain singularities in the waveform of the traveling wave. Step (c): calculating a wavefront slope k of the components of the line mode of the fault initial traveling wave. Step (d): computing a preliminary fault distance D according to the slope k computed in the step (c). Step (e): confirming a fault point according to the preliminary fault distance and wavelet singularities of the components of the line mode. Step (f): end.
-
-
-
Search Results
4
records
(took 0.012 seconds)
