CN202631677U - Electrical network fault locating system - Google Patents
Electrical network fault locating system Download PDFInfo
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- CN202631677U CN202631677U CN 201220089465 CN201220089465U CN202631677U CN 202631677 U CN202631677 U CN 202631677U CN 201220089465 CN201220089465 CN 201220089465 CN 201220089465 U CN201220089465 U CN 201220089465U CN 202631677 U CN202631677 U CN 202631677U
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- 238000001514 detection method Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 abstract description 8
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Abstract
The utility model provides an electrical network fault locating system, comprising the components as following: a fault indicator arranged on the branch line of an electrical network, wherein when a preset fault current on the branch line is detected, the fault signal of the branch line is emitted; a communicating terminal connected with the fault indicator, wherein the fault signal emitted by the fault indicator is received and transmitted; and a fault locating module, which receives the fault signal and determines the fault point position according to the fault signal. According to the electrical network fault locating system, artificial fault point query with a segment power failure method is unnecessary, and thereby the power supply stability of the electrical network is raised.
Description
Technical Field
The utility model relates to an electric power field especially relates to a grid fault detection system.
Background
At present, when a power grid fails, in order to find out a failure point, a method of performing a sectional investigation on a power transmission line is generally adopted, that is,: the method comprises the steps of segmenting the power transmission line, sequentially disconnecting the transmission lines and the power grid, and manually measuring whether the disconnected power transmission line has a fault so as to determine the line where the fault point is located. The method for searching the fault point has the problem that power failure in a fault-free area is caused because each section of circuit transmission line needs to be disconnected in sequence, so that the stability of power supply of a power grid is influenced.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a power grid fault positioning system, aim at solve current power grid fault positioning method because of cause the regional power failure of no trouble and influence the problem of the stability of power supply of electric wire netting.
A grid fault location system, comprising:
the fault indicator is arranged on a branch line of the power grid and used for sending a fault signal containing the information of the branch line when a preset fault current on the branch line is detected;
the communication terminal is connected with the fault indicator, receives the fault signal sent by the fault indicator and sends the fault signal;
and the fault positioning module is used for receiving the fault signal and determining the position of a fault point according to the fault signal.
Preferably, the fault indicator comprises:
the first detection unit is used for detecting whether a preset short-circuit current exists on the branch line;
and the first transmitting unit is used for transmitting the fault signal when the preset short-circuit current is detected.
Preferably, the fault indicator comprises:
transmitting a signal source of a single-phase earth fault current sequence to the branch line;
a second detecting unit for detecting whether the single-phase earth fault current sequence exists on the branch line;
a second transmitting unit that transmits the fault signal when the single-phase ground fault current is detected.
Preferably, the fault indicator further comprises:
and the alarm unit sends out an alarm signal when the fault current on the branch line is detected.
Preferably, the fault location module comprises:
a receiving unit that receives the failure signal;
a geographic information database storing preset geographic position information;
and the position determining unit is used for determining the geographical position of the fault point according to the fault signal and the geographical information database.
Preferably, the system further comprises:
and the fault point position sending unit is used for sending the position of the fault point to a preset terminal.
Preferably, the system further comprises:
and the display unit displays the position of the fault point.
Preferably, the system further comprises:
a storage database storing locations of the failure points.
The embodiment of the utility model provides a power grid fault detection system and method through set up fault indicator on the power line in the electric wire netting, can send fault signal to positioning terminal, and positioning terminal carries out the status with the fault point according to geographic information system, and need not adopt the method inquiry fault point that the segmentation had a power failure by the manual work again to the stability of electric wire netting power supply has been improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a power grid fault location system disclosed in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a fault location module in a power grid fault location system disclosed in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a fault indicator in the grid fault location system disclosed in the embodiment of the present invention;
fig. 4 is a schematic structural diagram of another fault indicator in the power grid fault location system disclosed in the embodiment of the present invention.
Detailed Description
The utility model discloses a grid fault positioning system for the position of the fault point in the automatic positioning electric wire netting, its core utility model point lies in, the system includes: a fault indicator which is arranged on a branch line of the power grid and sends a fault signal when fault current on the branch line is detected; the communication terminal receives the fault signal sent by the fault indicator and sends the fault signal; and the fault positioning module is used for determining the position of a fault point according to the fault signal. The system can quickly locate the specific position of the fault point, and manual detection of each section of the power line in sequence is not needed.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model discloses a grid fault positioning system is applied to among the current power network, as shown in FIG. 1, the system includes:
the fault indicator 101 is arranged on each branch line in the power grid and used for detecting preset fault current on the branch line, and sending a fault signal outwards when the preset fault current is detected;
generally, one fault indicator may be set for each branch line, or multiple fault indicators may be set for one branch line, and the more the number of fault indicators set on a branch line is, the more sensitive the system reacts to a grid fault.
The communication terminal 102 is configured to receive a fault signal sent by the fault indicator, and send the fault signal out;
optionally, the communication terminal may be disposed at a branch of a line in the power grid, and one communication terminal may receive the fault signal sent by the plurality of fault indicators at the same time, generally, the communication range between the fault indicator and the communication terminal is 2 meters to 10 meters, and the fault indicator located within the range from the communication terminal may send the fault information to the communication terminal. The communication terminal may receive or transmit the fault signal by wireless communication, for example, by GSM or GPRS communication.
And the fault positioning module 103 is configured to determine a position of a fault point according to the fault signal.
Preferably, as shown in fig. 2, the fault location module may specifically include:
a receiving unit 201 for receiving a fault signal;
the geographic information database 202 is configured to store preset geographic position information covered by the power grid, that is, physical position coordinates corresponding to each line in the power grid, which may be specific to physical position coordinates of each point on each line;
and a location determining unit 203, configured to determine a geographic location of the fault point according to the fault signal and the geographic information database.
Specifically, the fault signal may include information of the faulty branch line, such as the number of the faulty branch line, and the location determination unit may determine the specific location of the fault indicator according to the number of the fault indicator and by combining with the geographic information database.
The device for positioning the fault information by utilizing the geographic information system not only avoids the trouble of manually searching fault points, but also can improve the positioning accuracy.
Preferably, the system may further include:
a transmitting unit for transmitting the position information to a preset terminal after determining the position of the fault point
The preset terminal can be communication equipment of maintenance personnel, so that the maintenance personnel can timely process the fault.
Or,
and the display unit is used for displaying the position of the fault point, and the specific display mode can be that each branch of the power grid is displayed, and the position of the fault point is marked in the branch.
Or,
and the storage database is used for storing the position of the fault point.
Or any combination of the transmitting unit, the display unit and the storage database.
The sending unit, the display unit, and the storage database may be independently configured as units in the system, or may be integrated in the fault location module, which is not limited in this embodiment.
The power grid fault positioning system detects fault current through the fault indicator and sends a fault signal, the fault positioning module positions a fault point by combining with the geographic information system, the fault point can be positioned without sectionalized power failure of the power grid, and the power supply stability of the power grid is improved.
Further, the preset fault current in this embodiment may be a short-circuit current and/or a single-phase ground fault current sequence, and correspondingly, as shown in fig. 3, the fault indicator in this embodiment may specifically include:
a first detection unit 301, configured to detect a short-circuit current preset on the branch line;
the preset short-circuit current is a current which is increased from a current value to a preset peak value within a preset time and is changed from the preset peak value to zero. For example, if the current value is 100A, the detected current increases from 100A to 1000A and decreases to 0A within a preset time, indicating that there is a short-circuit current on the branch line.
A first transmitting unit 302, configured to transmit the fault signal when a preset short-circuit current is detected.
Alternatively, as shown in fig. 4, the fault indicator may specifically include:
a signal source 401, configured to transmit a single-phase ground fault current sequence to the branch line;
optionally, the signal source is arranged in the substation, and when the ground fault continues for a period of time, the signal source triggers the ac contactor to start sending a fault current sequence, where the current sequence can pass through a fault line but not a non-fault line, so that a fault indicator on the fault line can detect the fault current sequence.
A second detection unit 402 for detecting the single-phase ground fault current sequence on the branch line;
a second transmitting unit 403, configured to transmit the fault signal when the single-phase ground fault current is detected.
In practical applications, the structure of the fault indicator may be as shown in fig. 3, or as shown in fig. 4, or in order to implement that both the short-circuit fault of the line and the single-phase ground fault of the line can be detected, the structures shown in fig. 3 and fig. 4 may be integrated, where the integrated fault indicator specifically includes:
the signal source is used for transmitting a single-phase earth fault current sequence to the branch line;
the detection unit is used for detecting a preset short-circuit current or a single-phase earth fault current sequence on the branch line;
and the transmitting unit is used for transmitting the fault signal when a preset short-circuit current and/or the single-phase earth fault current sequence is detected.
The fault indicator is used for detecting the fault of the branch line, the hardware structure is easy to realize, and a foundation is laid for fault point positioning.
Further, the fault indicator may further include:
and the alarm unit is used for sending out an alarm signal when the fault current on the branch line is detected. The alarm unit can enable field personnel to quickly find out a fault line, and preferably, the alarm signal can be a voice alarm signal or a photoelectric alarm signal and the like.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A grid fault location system, comprising:
the fault indicator is arranged on a branch line of the power grid and used for sending a fault signal containing the information of the branch line when a preset fault current on the branch line is detected;
the communication terminal is connected with the fault indicator, receives the fault signal sent by the fault indicator and sends the fault signal;
and the fault positioning module is used for receiving the fault signal and determining the position of a fault point according to the fault signal.
2. The system of claim 1, wherein the fault indicator comprises:
the first detection unit is used for detecting whether a preset short-circuit current exists on the branch line;
and the first transmitting unit is used for transmitting the fault signal when the preset short-circuit current is detected.
3. The system of claim 1, wherein the fault indicator comprises:
transmitting a signal source of a single-phase earth fault current sequence to the branch line;
a second detecting unit for detecting whether the single-phase earth fault current sequence exists on the branch line;
a second transmitting unit that transmits the fault signal when the single-phase ground fault current is detected.
4. The system of any one of claims 1 to 3, wherein the fault indicator further comprises:
and the alarm unit sends out an alarm signal when the fault current on the branch line is detected.
5. The system of claim 1, wherein the fault location module comprises:
a receiving unit that receives the failure signal;
a geographic information database storing preset geographic position information;
and the position determining unit is used for determining the geographical position of the fault point according to the fault signal and the geographical information database.
6. The system of claim 1 or 5, further comprising:
and the fault point position sending unit is used for sending the position of the fault point to a preset terminal.
7. The system of any one of claims 1 to 5, further comprising:
and the display unit displays the position of the fault point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220089465 CN202631677U (en) | 2012-03-09 | 2012-03-09 | Electrical network fault locating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220089465 CN202631677U (en) | 2012-03-09 | 2012-03-09 | Electrical network fault locating system |
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| Publication Number | Publication Date |
|---|---|
| CN202631677U true CN202631677U (en) | 2012-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220089465 Expired - Lifetime CN202631677U (en) | 2012-03-09 | 2012-03-09 | Electrical network fault locating system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308820A (en) * | 2012-03-09 | 2013-09-18 | 建德市供电局 | Power grid fault positioning system |
| CN103513161A (en) * | 2013-09-27 | 2014-01-15 | 孙双春 | Power transmission and transformation system fault searching locating instrument and searching method |
| CN104823062A (en) * | 2013-01-08 | 2015-08-05 | 伊顿公司 | Detection and location of electrical connections with micro-interface anomalies in electrical systems |
| CN105676064A (en) * | 2016-01-12 | 2016-06-15 | 国网浙江省电力公司嘉兴供电公司 | User-side leakage current monitoring method and system |
-
2012
- 2012-03-09 CN CN 201220089465 patent/CN202631677U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308820A (en) * | 2012-03-09 | 2013-09-18 | 建德市供电局 | Power grid fault positioning system |
| CN104823062A (en) * | 2013-01-08 | 2015-08-05 | 伊顿公司 | Detection and location of electrical connections with micro-interface anomalies in electrical systems |
| CN103513161A (en) * | 2013-09-27 | 2014-01-15 | 孙双春 | Power transmission and transformation system fault searching locating instrument and searching method |
| CN103513161B (en) * | 2013-09-27 | 2017-07-14 | 中国石油化工股份有限公司 | Electrical power trans mission/distribution system trouble shoot position indicator and lookup method |
| CN105676064A (en) * | 2016-01-12 | 2016-06-15 | 国网浙江省电力公司嘉兴供电公司 | User-side leakage current monitoring method and system |
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Granted publication date: 20121226 |