CN112964922A - Wide-area synchronous transient current recording method - Google Patents
Wide-area synchronous transient current recording method Download PDFInfo
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- CN112964922A CN112964922A CN202110133898.XA CN202110133898A CN112964922A CN 112964922 A CN112964922 A CN 112964922A CN 202110133898 A CN202110133898 A CN 202110133898A CN 112964922 A CN112964922 A CN 112964922A
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- 230000001052 transient effect Effects 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 15
- 238000005070 sampling Methods 0.000 claims abstract description 53
- 230000005540 biological transmission Effects 0.000 claims abstract description 28
- 239000013307 optical fiber Substances 0.000 claims description 3
- 230000002776 aggregation Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0046—Arrangements for measuring currents or voltages or for indicating presence or sign thereof characterised by a specific application or detail not covered by any other subgroup of G01R19/00
- G01R19/0053—Noise discrimination; Analog sampling; Measuring transients
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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Abstract
The invention relates to a wide-area synchronous transient current recording method, which comprises the following steps: acquiring current signals of a plurality of endpoints of a power transmission line, wherein each endpoint comprises three acquisition ends and a convergence end, and acquiring high-frequency sampling data of the current signals; interpolating the high-frequency sampling data to obtain frequency division data, and determining a transient characteristic signal of the current signal according to the frequency division data; extracting a transient current signal of the current signal by using a transient characteristic signal of the current signal; calculating the transient current signal distance of the power transmission line according to the transient current signal; and judging whether the transient current signal distance is larger than the signal distance setting value, if so, judging that the power transmission line has a fault, and if not, judging that the power transmission line has no fault. The method can quickly extract the transient current signal, is reliable and easy to realize, and reduces the misjudgment probability.
Description
Technical Field
The invention relates to a transient state wave recording method, in particular to a wide-area synchronous transient state current wave recording method.
Background
After the power transmission line breaks down, the fault point needs to be quickly and accurately positioned, and the fault is timely eliminated to recover power supply, so that the power supply reliability of the whole system is guaranteed. Whether the fault line is an overhead line or a cable line, when the fault occurs, most faults have no obvious burn traces, great difficulty is brought to troubleshooting of fault points, the line patrol range is determined mainly by fault location data, and the location accuracy and reliability of the line patrol range depend on the sampling accuracy and reliability of transient current traveling wave signals to a great extent. But the transmission line environment is complex, the signal interference is strong, and the sampling precision and the reliability of the recording data are difficult to ensure.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a wide-area synchronous transient current recording method, which solves the problem that the sampling precision and reliability of recording data are difficult to ensure in the prior art.
A wide-area synchronous transient current recording method comprises the following steps:
step 1, collecting current signals of a plurality of endpoints of a power transmission line, wherein each endpoint comprises three collecting ends and a converging end, and acquiring high-frequency sampling data of the current signals;
step 2, interpolating the high-frequency sampling data to obtain frequency division data, and determining a transient characteristic signal of the current signal according to the frequency division data;
step 3, extracting a transient current signal of the current signal by using the transient characteristic signal of the current signal;
step 4, calculating the transient current signal distance of the power transmission line according to the transient current signal;
and 5, judging whether the transient current signal distance is larger than the signal distance setting value, if so, judging that the power transmission line has a fault, and if not, judging that the power transmission line has no fault.
In the step 1, the aggregation end sends the time synchronization information of the endpoint to three acquisition ends of the endpoint; and after the three acquisition ends of each end point receive the time synchronization information, identifying respective time synchronization information.
In the step 1, the high-frequency sampling data is collected through a high-frequency collecting module, and the high-frequency collecting module is connected with the current sensing module through an optical fiber and receives the high-frequency sampling data sent by the current sensing module.
In the step 1, the high-frequency sampling data comprises a current sampling value, a current sampling value corresponding to the nth sampling point before the current sampling point and a current sampling value corresponding to the 2 nth sampling point before the current sampling point; judging whether a high-frequency sampling wave recording condition is met or not based on a preset high-frequency wave recording starting threshold value; and if the high-frequency sampling wave recording starting condition is met, sampling high-frequency data, and recording the high-frequency sampling starting moment.
In the step 5, when the transient current signal distance of the positive line is greater than the signal distance setting value, the fault of the power transmission line is the fault of the positive line; when the transient current signal distance of the negative electrode circuit is greater than the signal distance setting value, the fault of the power transmission line is a fault of the negative electrode circuit; and when the transient current signal distances of the positive electrode line and the negative electrode line are both larger than the signal distance setting value, the transmission line fault is an interelectrode fault.
The invention has the technical effects and advantages that:
the invention adopts the wide-area synchronous time scale to collect data, not only the data collection is comprehensive, the credibility is high, but also the free and flexible selection of the synchronous time scale is realized, and the continuous high-precision synchronous collection is realized. In addition, the invention unifies the synchronization time through the convergence end, has higher real-time performance, can effectively ensure the uniqueness of the time synchronization information, and reduces the transmission delay of the time synchronization information. Meanwhile, the transient current signal can be extracted quickly, the method is reliable and easy to implement, and the misjudgment probability is reduced.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A wide-area synchronous transient current recording method comprises the following steps:
step 1, collecting current signals of a plurality of endpoints of a power transmission line, wherein each endpoint comprises three collecting ends and a converging end, and acquiring high-frequency sampling data of the current signals;
step 2, interpolating the high-frequency sampling data to obtain frequency division data, and determining a transient characteristic signal of the current signal according to the frequency division data;
step 3, extracting a transient current signal of the current signal by using the transient characteristic signal of the current signal;
step 4, calculating the transient current signal distance of the power transmission line according to the transient current signal;
and 5, judging whether the transient current signal distance is larger than the signal distance setting value, if so, judging that the power transmission line has a fault, and if not, judging that the power transmission line has no fault.
In the step 1, the aggregation end sends the time synchronization information of the endpoint to three acquisition ends of the endpoint; and after the three acquisition ends of each end point receive the time synchronization information, identifying respective time synchronization information.
In the step 1, the high-frequency sampling data is collected through a high-frequency collecting module, and the high-frequency collecting module is connected with the current sensing module through an optical fiber and receives the high-frequency sampling data sent by the current sensing module.
In the step 1, the high-frequency sampling data comprises a current sampling value, a current sampling value corresponding to the nth sampling point before the current sampling point and a current sampling value corresponding to the 2 nth sampling point before the current sampling point; judging whether a high-frequency sampling wave recording condition is met or not based on a preset high-frequency wave recording starting threshold value; and if the high-frequency sampling wave recording starting condition is met, sampling high-frequency data, and recording the high-frequency sampling starting moment.
In the step 5, when the transient current signal distance of the positive line is greater than the signal distance setting value, the fault of the power transmission line is the fault of the positive line; when the transient current signal distance of the negative electrode circuit is greater than the signal distance setting value, the fault of the power transmission line is a fault of the negative electrode circuit; and when the transient current signal distances of the positive electrode line and the negative electrode line are both larger than the signal distance setting value, the transmission line fault is an interelectrode fault.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A wide-area synchronous transient current recording method is characterized by comprising the following steps:
step 1, collecting current signals of a plurality of endpoints of a power transmission line, wherein each endpoint comprises three collecting ends and a converging end, and acquiring high-frequency sampling data of the current signals; step 2, interpolating the high-frequency sampling data to obtain frequency division data, and determining a transient characteristic signal of the current signal according to the frequency division data;
step 3, extracting a transient current signal of the current signal by using the transient characteristic signal of the current signal;
step 4, calculating the transient current signal distance of the power transmission line according to the transient current signal; step 5, judging whether the transient current signal distance is larger than the setting value of the signal distance,
if yes, the transmission line has a fault, and if not, the transmission line has no fault.
2. The wide-area synchronous transient current recording method according to claim 1, wherein in step 1, said sink terminal sends the time synchronization information of the terminal point to three acquisition terminals of the terminal point; and after the three acquisition ends of each end point receive the time synchronization information, identifying respective time synchronization information.
3. The wide-area synchronous transient current recording method according to claim 1, wherein in step 1, the high-frequency sampling data is collected by a high-frequency collecting module, and the high-frequency collecting module is connected to the current sensing module through an optical fiber to receive the high-frequency sampling data sent by the current sensing module.
4. The wide-area synchronous transient current recording method according to claim 1, wherein in step 1, the high-frequency sampling data includes a current sampling value, a current sampling value corresponding to an nth sampling point before a current sampling point, and a current sampling value corresponding to an nth sampling point before the current sampling point; judging whether a high-frequency sampling wave recording condition is met or not based on a preset high-frequency wave recording starting threshold value; and if the high-frequency sampling wave recording starting condition is met, sampling high-frequency data, and recording the high-frequency sampling starting moment.
5. The wide-area synchronous transient current recording method according to claim 1, wherein in step 5, when the transient current signal distance of the positive line is greater than the signal distance setting value, the transmission line fault is a positive line fault; when the transient current signal distance of the negative electrode circuit is greater than the signal distance setting value, the fault of the power transmission line is a fault of the negative electrode circuit; and when the transient current signal distances of the positive electrode line and the negative electrode line are both larger than the signal distance setting value, the transmission line fault is an interelectrode fault.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113702761A (en) * | 2021-08-26 | 2021-11-26 | 国网吉林省电力有限公司松原供电公司 | Wide-area synchronization-based transient current recording method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014089899A1 (en) * | 2012-12-10 | 2014-06-19 | 国家电网公司 | Distribution network phase-to-earth fault location method and location device based on transient signal wavelet transformation |
| CN104316844A (en) * | 2014-11-14 | 2015-01-28 | 广东电网有限责任公司佛山供电局 | Power distribution network fault type recognition method and device |
| CN205809230U (en) * | 2016-06-30 | 2016-12-14 | 国网江西省电力公司检修分公司 | A kind of Single Terminal Traveling Wave Fault Location device gathered based on Dual-rate Data |
| CN109342884A (en) * | 2018-11-09 | 2019-02-15 | 南京大贺电力科技有限公司 | Travelling wave ranging and fault recording integrated device and implementation method |
| CN110426593A (en) * | 2019-08-22 | 2019-11-08 | 苏州银蕨电力科技有限公司 | A kind of method for locating single-phase ground fault based on residual voltage starting |
| WO2019216878A1 (en) * | 2018-05-07 | 2019-11-14 | Inhand Networks Inc. | System for locating fault in power distribution network based on mixed mode wave recording |
| CN111257700A (en) * | 2020-03-31 | 2020-06-09 | 国网江苏省电力有限公司无锡供电分公司 | Power distribution network single-phase earth fault positioning device and method based on edge calculation |
-
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- 2021-02-01 CN CN202110133898.XA patent/CN112964922B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014089899A1 (en) * | 2012-12-10 | 2014-06-19 | 国家电网公司 | Distribution network phase-to-earth fault location method and location device based on transient signal wavelet transformation |
| CN104316844A (en) * | 2014-11-14 | 2015-01-28 | 广东电网有限责任公司佛山供电局 | Power distribution network fault type recognition method and device |
| CN205809230U (en) * | 2016-06-30 | 2016-12-14 | 国网江西省电力公司检修分公司 | A kind of Single Terminal Traveling Wave Fault Location device gathered based on Dual-rate Data |
| WO2019216878A1 (en) * | 2018-05-07 | 2019-11-14 | Inhand Networks Inc. | System for locating fault in power distribution network based on mixed mode wave recording |
| CN109342884A (en) * | 2018-11-09 | 2019-02-15 | 南京大贺电力科技有限公司 | Travelling wave ranging and fault recording integrated device and implementation method |
| CN110426593A (en) * | 2019-08-22 | 2019-11-08 | 苏州银蕨电力科技有限公司 | A kind of method for locating single-phase ground fault based on residual voltage starting |
| CN111257700A (en) * | 2020-03-31 | 2020-06-09 | 国网江苏省电力有限公司无锡供电分公司 | Power distribution network single-phase earth fault positioning device and method based on edge calculation |
Non-Patent Citations (1)
| Title |
|---|
| 钱海 等: "基于历史故障波形的行波测距装置检验方法", 电力系统保护与控制, vol. 41, no. 16, 9 August 2013 (2013-08-09), pages 139 - 143 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113702761A (en) * | 2021-08-26 | 2021-11-26 | 国网吉林省电力有限公司松原供电公司 | Wide-area synchronization-based transient current recording method |
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