CN115808590A - Power distribution network fault detection processing method based on feeder line information analysis - Google Patents
Power distribution network fault detection processing method based on feeder line information analysis Download PDFInfo
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- CN115808590A CN115808590A CN202211497083.0A CN202211497083A CN115808590A CN 115808590 A CN115808590 A CN 115808590A CN 202211497083 A CN202211497083 A CN 202211497083A CN 115808590 A CN115808590 A CN 115808590A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
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- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
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Abstract
The invention provides a power distribution network fault detection processing method based on feeder line information analysis, which comprises the following steps: (1): collecting information; (2): judging whether the power distribution network has a fault, if so, going to (3); no, to (1); (3): constructing a connection relation matrix of the power distribution network; (4): calling fault current; (5): establishing a fault information matrix; (6): establishing a fault judgment matrix; (7): determining a fault position; (8): extracting fault time; (9): judging whether the fault time is greater than a first time reference value, if so, going to (10); no, transient fault, to (1); (10): judging whether the fault time is greater than a second time reference value, if so, switching the power supply, and switching or stopping the circuit of the important equipment; otherwise, continuing working and checking. The invention provides a power distribution network fault detection processing method based on feeder line information analysis, which can accurately and quickly judge the fault and the position of a power distribution network and carry out power supply conversion on important electric equipment.
Description
Technical Field
The invention belongs to the technical field of power detection, and particularly relates to a power distribution network fault detection processing method based on feeder line information analysis.
Background
The power distribution network is an important component in a power system and provides safe and reliable electric energy for users. When the power distribution network breaks down, the power distribution network needs to be positioned in time and the faults are eliminated, otherwise, not only the production and life of users are influenced, but also the safety and the reliability of the power distribution network are influenced in serious cases.
The invention provides a power distribution network fault detection processing method based on feeder information analysis, which comprises the steps of collecting feeder voltage signals and fault current signals at a measurement and control point of a power distribution network line, carrying out primary judgment according to the feeder voltage signals, constructing a fault judgment matrix according to the fault current signals, further accurately and rapidly judging the fault position of the power distribution network, carrying out power supply conversion on important electric equipment at a non-instantaneous fault point according to the fault time, informing workers of fault processing, and further improving the safety and reliability of the power distribution network.
Disclosure of Invention
The invention provides a power distribution network fault detection processing method based on feeder line information analysis, which can accurately and quickly judge the fault and the fault position of a power distribution network and carry out power supply conversion on important electric equipment of a non-instantaneous fault point.
The invention specifically relates to a power distribution network fault detection processing method based on feeder line information analysis, which comprises the following steps:
step (1): collecting a feeder line voltage signal and a fault current signal at a measurement and control point of the power distribution network line;
step (2): preliminarily judging whether the power distribution network has faults or not according to the feeder line voltage signal, and if so, entering the step (3); if not, returning to the step (1);
and (3): constructing a connection relation matrix of the power distribution network;
and (4): calling the fault current signal;
and (5): establishing a fault information matrix;
and (6): establishing a fault judgment matrix;
and (7): determining a fault position according to the fault judgment matrix;
and (8): extracting fault time;
and (9): judging whether the fault time is greater than a first time reference value, if so, entering a step (10); if not, the fault is a transient fault and disappears, and the step (1) is returned;
step (10): judging whether the fault time is greater than a second time reference value, if so, controlling important equipment of the circuit to switch a power supply, and switching or stopping the circuit; if not, the power transmission and distribution line continues to work, and related workers are informed to carry out fault detection.
The specific method for preliminarily judging whether the power distribution network fails according to the feeder voltage signal comprises the following steps:
calculating the difference value of the voltage signals of two adjacent feeder lines;
calculating the change rate of two adjacent feeder line voltage signals;
judging whether the change is larger than a reference value of the change rate of the feeder voltage, if so, the power distribution network breaks down; if not, the power distribution network does not have a fault.
The specific method for constructing the power distribution network connection relation matrix comprises the following steps:
d is a matrix of n x n, wherein n is the number of the measurement and control points of the power distribution network;
when the measurement and control point i and the measurement and control point j are on the same feeder line and the positive direction of the line is pointed to the measurement and control point j, d by the measurement and control point i ij =1; otherwise, d ij ＝0。
The method for establishing the fault information matrix G comprises the following steps:
judging whether the fault current exists between the measurement and control point i and the measurement and control point j, if so, g ij =1; if not, g ij ＝0。
The algorithm for establishing the fault judgment matrix is as follows: p = D + G.
The specific method for determining the fault position according to the fault judgment matrix comprises the following steps:
judging whether the elements in the fault judgment matrix satisfy P ii =1, and has P for all j (i ≠ j) ij =0, the feeder at the end of the measurement and control point i has a fault;
judging whether the elements in the fault judgment matrix satisfy P ii =1, and has P for all j (i ≠ j) ij When =1, all have P jj =0, the feeder voltage signal at the measurement and control point i and the feeder voltage signal at the measurement and control point j are taken, the change rate of the feeder voltage signal at the measurement and control point i and the change rate of the feeder voltage signal at the measurement and control point j are calculated, whether the change rate is greater than the reference value of the change rate of the feeder voltage is judged, and if yes, a feeder section between the measurement and control point i and the measurement and control point j is a fault section; if not, the feeder line section between the measurement and control point i and the measurement and control point j has no fault.
Compared with the prior art, the beneficial effects are: the power distribution network fault detection processing method collects feeder voltage signals and fault current signals at a power distribution network line measurement and control point, conducts primary judgment according to the feeder voltage signals, constructs a fault judgment matrix according to the fault current signals, further accurately and rapidly judges the fault position of the power distribution network, conducts power supply conversion on important electric equipment at a non-instantaneous fault point according to the fault time, and informs workers of fault processing.
Drawings
Fig. 1 is a flowchart of a power distribution network fault detection processing method based on feeder information analysis according to the present invention.
Detailed Description
The following describes in detail a specific embodiment of the method for detecting and processing a power distribution network fault based on feeder line information analysis according to the present invention with reference to the accompanying drawings.
As shown in fig. 1, the method for detecting and processing the fault of the power distribution network of the present invention includes the following steps:
step (1): collecting a feeder line voltage signal and a fault current signal at a measurement and control point of the power distribution network line;
step (2): calculating the difference value of the voltage signals of two adjacent feeder lines;
calculating the change rate of two adjacent feeder line voltage signals;
judging whether the change is larger than a reference value of a change rate of the feeder voltage, if so, judging that the power distribution network has a fault, and entering the step (3); if not, the power distribution network does not have a fault, and returning to the step (1);
and (3): constructing a connection relation matrix of the power distribution network: d is a matrix of n x n, wherein n is the number of the measurement and control points of the power distribution network;
when the measurement and control point i and the measurement and control point j are on the same feeder line and the positive direction of the line is pointed to the measurement and control point j, d by the measurement and control point i ij =1; otherwise, d ij ＝0；
And (4): retrieving the fault current signal;
and (5): establishing a fault information matrix G: judging whether the fault current exists between the measurement and control point i and the measurement and control point j, if so, g ij =1; if not, g ij ＝0；
And (6): establishing a fault judgment matrix P = D + G;
and (7): determining the fault position according to the fault judgment matrix:
judging whether the elements in the fault judgment matrix satisfy P ii =1 and P for all j (i ≠ j) ij =0, the feeder at the end of the measurement and control point i has a fault;
judging whether the elements in the fault judgment matrix satisfy P ii =1, and has P for all j (i ≠ j) ij When =1, all have P jj =0, the feeder voltage signal at the measurement and control point i and the feeder voltage signal at the measurement and control point j are taken, the change rate of the feeder voltage signal at the measurement and control point i and the change rate of the feeder voltage signal at the measurement and control point j are calculated, whether the change rate is greater than the reference value of the change rate of the feeder voltage is judged, and if yes, a feeder section between the measurement and control point i and the measurement and control point j is a fault section; if not, the feeder line section between the measurement and control point i and the measurement and control point j has no fault;
and (8): extracting fault time;
and (9): judging whether the fault time is greater than a first time reference value, if so, entering a step (10); if not, the fault is a transient fault and disappears, and the step (1) is returned;
step (10): judging whether the fault time is greater than a second time reference value, if so, controlling important equipment of the circuit to switch a power supply, and switching or stopping the circuit; if not, the power transmission and distribution line continues to work, and relevant workers are informed to carry out fault check.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A power distribution network fault detection processing method based on feeder line information analysis is characterized by comprising the following steps:
step (1): collecting a feeder line voltage signal and a fault current signal at a measurement and control point of the power distribution network line;
step (2): preliminarily judging whether the power distribution network fails according to the feeder voltage signal, and if so, entering the step (3); if not, returning to the step (1);
and (3): constructing a connection relation matrix of the power distribution network;
and (4): calling the fault current signal;
and (5): establishing a fault information matrix;
and (6): establishing a fault judgment matrix;
and (7): determining a fault position according to the fault judgment matrix;
and (8): extracting fault time;
and (9): judging whether the fault time is greater than a first time reference value, if so, entering a step (10); if not, the fault is a transient fault and disappears, and the step (1) is returned;
step (10): judging whether the fault time is greater than a second time reference value, if so, controlling important equipment of the circuit to switch a power supply, and switching or stopping the circuit; if not, the power transmission and distribution line continues to work, and relevant workers are informed to carry out fault check.
2. The method for detecting and processing the faults of the power distribution network based on the feeder line information analysis as claimed in claim 1, wherein the specific method for preliminarily judging whether the power distribution network has the fault according to the feeder line voltage signal is as follows:
calculating the difference value of the voltage signals of two adjacent feeder lines;
calculating the change rate of the voltage signals of two adjacent feeder lines;
judging whether the change is larger than a reference value of the change rate of the feeder voltage, if so, the power distribution network breaks down; if not, the power distribution network does not have a fault.
3. The distribution network fault detection processing method based on feeder information analysis as claimed in claim 2, wherein the specific method for constructing the distribution network connection relation matrix is as follows:
d is a matrix of n x n, wherein n is the number of the measurement and control points of the power distribution network;
when the measurement and control point i and the measurement and control point j are on the same feeder line and the positive direction of the line is pointed to the measurement and control point j, d by the measurement and control point i ij =1; otherwise, d ij ＝0。
4. The method for detecting and processing the faults of the power distribution network based on feeder line information analysis as claimed in claim 3, wherein the method for establishing the fault information matrix G is as follows: judging whether the fault current exists between the measurement and control point i and the measurement and control point j, if so, g ij =1; if not, g ij ＝0。
5. A distribution network fault detection processing method based on feeder information analysis according to claim 4, characterized in that the algorithm for establishing the fault judgment matrix is as follows: p = D + G.
6. The distribution network fault detection processing method based on feeder information analysis as claimed in claim 5, wherein the specific method for determining the fault location according to the fault determination matrix is as follows:
judging whether the elements in the fault judgment matrix satisfy P ii =1 and P for all j (i ≠ j) ij =0, the feeder line at the end of the measurement and control point i has a fault;
judging whether the elements in the fault judgment matrix satisfy P ii =1 and P for all j (i ≠ j) ij When =1, all have P jj =0, the feeder voltage signal at the measurement and control point i and the feeder voltage signal at the measurement and control point j are taken, the change rate of the feeder voltage signal at the measurement and control point i and the change rate of the feeder voltage signal at the measurement and control point j are calculated, whether the change rate is greater than the reference value of the change rate of the feeder voltage is judged, and if yes, a feeder section between the measurement and control point i and the measurement and control point j is a fault section; if not, the feeder line section between the measurement and control point i and the measurement and control point j has no fault.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2741425A1 (en) * | 2008-10-27 | 2010-05-06 | Tsinghua University | Method for detecting single phase grounding fault based on harmonic component of residual current |
| CN104820163A (en) * | 2015-04-13 | 2015-08-05 | 同济大学 | FTU-based power distribution network fault positioning method |
| CN107230970A (en) * | 2016-03-24 | 2017-10-03 | 中国电力科学研究院 | A kind of singlephase earth fault processing method of the feeder automation of type on the spot |
| CN114236308A (en) * | 2021-11-17 | 2022-03-25 | 国网江苏省电力有限公司盐城供电分公司 | Feeder line information-based power distribution network fault detection and positioning method |
| CN114336552A (en) * | 2022-03-10 | 2022-04-12 | 青岛鼎信通讯股份有限公司 | Feeder terminal-based distribution line fault rapid isolation method |
| CN114859178A (en) * | 2022-05-27 | 2022-08-05 | 湖南大学 | Power distribution network fault section positioning method based on improved matrix method |
| CN115061004A (en) * | 2022-04-29 | 2022-09-16 | 国网上海市电力公司 | Power distribution ring network fault positioning method based on matrix algorithm |
| CN115112997A (en) * | 2022-06-28 | 2022-09-27 | 夏玲芳 | Power distribution network fault interval positioning method and device and terminal equipment |
| CN115347562A (en) * | 2022-08-23 | 2022-11-15 | 国网天津市电力公司 | Method for rapidly arriving emergency repair of power distribution network under AI technology |
-
2022
- 2022-11-25 CN CN202211497083.0A patent/CN115808590A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2741425A1 (en) * | 2008-10-27 | 2010-05-06 | Tsinghua University | Method for detecting single phase grounding fault based on harmonic component of residual current |
| CN104820163A (en) * | 2015-04-13 | 2015-08-05 | 同济大学 | FTU-based power distribution network fault positioning method |
| CN107230970A (en) * | 2016-03-24 | 2017-10-03 | 中国电力科学研究院 | A kind of singlephase earth fault processing method of the feeder automation of type on the spot |
| CN114236308A (en) * | 2021-11-17 | 2022-03-25 | 国网江苏省电力有限公司盐城供电分公司 | Feeder line information-based power distribution network fault detection and positioning method |
| CN114336552A (en) * | 2022-03-10 | 2022-04-12 | 青岛鼎信通讯股份有限公司 | Feeder terminal-based distribution line fault rapid isolation method |
| CN115061004A (en) * | 2022-04-29 | 2022-09-16 | 国网上海市电力公司 | Power distribution ring network fault positioning method based on matrix algorithm |
| CN114859178A (en) * | 2022-05-27 | 2022-08-05 | 湖南大学 | Power distribution network fault section positioning method based on improved matrix method |
| CN115112997A (en) * | 2022-06-28 | 2022-09-27 | 夏玲芳 | Power distribution network fault interval positioning method and device and terminal equipment |
| CN115347562A (en) * | 2022-08-23 | 2022-11-15 | 国网天津市电力公司 | Method for rapidly arriving emergency repair of power distribution network under AI technology |
Non-Patent Citations (1)
| Title |
|---|
| 曾浩然等: "基于电压幅值纠正的配电网故障定位矩阵算法", 电力科学与工程, vol. 36, no. 7, pages 41 - 46 * |
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