CN113655338B - Positioning device for tripping point of power transmission line - Google Patents
Positioning device for tripping point of power transmission line Download PDFInfo
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- CN113655338B CN113655338B CN202110936454.XA CN202110936454A CN113655338B CN 113655338 B CN113655338 B CN 113655338B CN 202110936454 A CN202110936454 A CN 202110936454A CN 113655338 B CN113655338 B CN 113655338B
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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
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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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
- G01R31/088—Aspects of digital computing
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- 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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- 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
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Locating Faults (AREA)
Abstract
The invention discloses a positioning device for a trip point of a power transmission line. The positioning device includes: a measuring unit, a calculating unit and a power supply; wherein the measuring unit is used for measuring the first time T 1 And a second time T 2 Wherein the first time T 1 For the time of transmission of the sound wave through the first medium to the positioning device, the second time T 2 The time when the sound wave is transmitted to the positioning device through the second medium is determined, and the sound wave is generated based on the tripping of the power transmission line; the calculating unit is electrically connected with the measuring unit and is used for measuring the first time T 1 And a second time T 2 Calculating the distance D between the tripping point of the power transmission line and the positioning device; and the power supply is used for supplying power to the calculation unit and the measurement unit. The scheme provided by the invention can accurately position the tripping point of the power transmission line through sound waves.
Description
Technical Field
The embodiment of the invention relates to the technical field of power grid safety, in particular to a positioning device for a trip point of a power transmission line.
Background
The finding of the tripping fault point of the transmission line (also called the tripping point of the transmission line) is a problem which is often encountered in the operation and maintenance work of the transmission line, so that the positioning device of the tripping point of the transmission line is a key instrument for carrying out the work.
At present, technologies such as fault recording and lightning positioning systems can position a trip point of a power transmission line within a range of 1-5 kilometers, but the situation of inaccurate positioning often exists. How to improve the positioning accuracy of the trip point of the power transmission line becomes a problem which needs to be solved urgently at present.
Disclosure of Invention
The invention provides a positioning device of a trip point of a power transmission line, which can accurately position the trip point of the power transmission line through sound waves.
In a first aspect, an embodiment of the present invention provides a positioning device for a trip point of a power transmission line, where the positioning device includes: the device comprises a measuring unit, a calculating unit and a power supply; wherein the content of the first and second substances,
a measuring unit for measuring a first time T 1 And a second time T 2 Wherein the first time T 1 For the time of transmission of the sound wave through the first medium to the positioning device, the second time T 2 The time when the sound wave is transmitted to the positioning device through the second medium is determined, and the sound wave is generated based on tripping of the power transmission line;
the computing unit is electrically connected with the measuring unitAccording to a first time T 1 And a second time T 2 Calculating the distance D between the trip point of the power transmission line and the positioning device;
and the power supply is used for supplying power to the calculation unit and the measurement unit.
Optionally, the distance D between the trip point of the power transmission line and the positioning device is calculated by the following formula:
wherein, V 1 Is the propagation velocity, V, of an acoustic wave in a first medium 2 Is the propagation velocity of the acoustic wave in the second medium.
Optionally, the positioning device further includes: a communication unit;
the communication unit is electrically connected with the computing unit and the power supply and is used for sending alarm information, and the alarm information comprises the distance D between the tripping point of the power transmission line and the positioning device.
Optionally, the communication unit is an antenna.
Optionally, the measurement unit includes: the device comprises a first measuring subunit, a second measuring subunit and a signal processing subunit;
the first measuring subunit is used for acquiring a first displacement signal of the sound wave transmitted to the positioning device through a first medium;
the second measuring subunit is used for acquiring a second displacement signal of the sound wave transmitted to the positioning device through a second medium;
the signal processing subunit is electrically connected with the first measuring subunit and the second measuring subunit, and is used for processing the first displacement signal and the second displacement signal and recording the first time T 1 And a second time T 2 。
Optionally, the first medium is a gas and the second medium is a solid.
Optionally, the first measuring subunit includes: the device comprises an insulating tympanic membrane, a closed shell, a piston and a first displacement meter; the probe of the first displacement meter is connected with the piston;
when the sound wave is transmitted to the insulating eardrum through air, the insulating eardrum vibrates and drives the piston to do reciprocating motion, so that the first displacement meter obtains a first displacement signal.
Optionally, the second measuring subunit includes: the iron tower contacts the probe head and the second displacement meter; one end of the iron tower contacting the probe head contacts the iron tower, and the other end of the iron tower contacting the probe head is connected with a probe of the second displacement meter;
when the sound wave is transmitted to the iron tower contact probe head through the iron tower, the iron tower contact probe head vibrates, so that the second displacement meter obtains a second displacement signal.
Optionally, the signal processing subunit is further configured to store the first displacement signal and the second displacement signal.
Optionally, the material of the insulating eardrum is rubber; the material of the closed shell is any one of plastic steel, glass and ceramic; the inert gas is at least one of helium and neon.
The invention provides a positioning device for trip points of a power transmission line, which comprises: a measuring unit, a calculating unit and a power supply; wherein the measuring unit is used for measuring the first time T 1 And a second time T 2 Wherein the first time T 1 For the time of transmission of the sound wave through the first medium to the positioning device, the second time T 2 The time when the sound wave is transmitted to the positioning device through the second medium is determined, and the sound wave is generated based on the tripping of the power transmission line; the calculating unit is electrically connected with the measuring unit and is used for measuring the first time T 1 And a second time T 2 Calculating the distance D between the trip point of the power transmission line and the positioning device; and the power supply is used for supplying power to the calculating unit and the measuring unit. The positioning device for the tripping point of the power transmission line provided by the invention utilizes the characteristic that the propagation speeds of sound waves in different media are different, the position of the tripping point of the power transmission line is accurately positioned, and the problem of inaccurate positioning of the tripping point of the power transmission line is solved.
Drawings
Fig. 1 is a schematic structural diagram of a positioning device for a trip point of a power transmission line according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another positioning device for a trip point of a power transmission line according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a positioning device for a trip point of another power transmission line according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a measurement unit according to a second embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Also, unless explicitly described to the contrary, the word "comprise" and variations such as "comprises" or "comprising", will be understood to imply the inclusion of stated elements but not the exclusion of any other elements.
It should also be noted that references to "and/or" in embodiments of the invention are intended to include any and all combinations of one or more of the associated listed items. Various components are described in embodiments of the present invention with "first", "second", "third", and the like, but these components should not be limited by these terms. These terms are only used to distinguish one component from another component. Also, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
While certain embodiments may be practiced differently, the specific process sequence may be performed differently than that described. For example, two processes described consecutively may be performed at substantially the same time or in an order reverse to that described.
Example one
Fig. 1 is a schematic structural diagram of a positioning device for a trip point of a power transmission line according to an embodiment of the present invention, and as shown in fig. 1, the positioning device for a trip point of a power transmission line according to the embodiment includes: a measurement unit 100, a calculation unit 200 and a power supply 300. Wherein, the calculating unit 200 is electrically connected with the measuring unit 100, and the power supply 300 is electrically connected with the measuring unit 100 and the calculating unit 200, respectively.
A measuring unit 100 for measuring a first time T 1 And a second time T 2 Wherein the first time T 1 For the time of transmission of the sound wave through the first medium to the positioning device, the second time T 2 The time when the sound wave is transmitted to the positioning device through the second medium is determined, and the sound wave is generated based on the tripping of the power transmission line;
a calculation unit 200 for calculating a first time T 1 And a second time T 2 Calculating the distance D between the tripping point of the power transmission line and the positioning device;
and a power supply 300 for supplying power to the calculation unit 200 and the measurement unit 300.
When the transmission line trips, an acoustic wave is generated and transmitted to a positioning device of a tripping point of the transmission line through two different media. Due to the different propagation velocities of the sound waves in the different media, the first time T at which the sound waves are transmitted through the first medium to the positioning device 1 And a second time T at which the acoustic wave is transmitted to the positioning device through a second medium 2 There is a time difference Δ T, Δ T = | T 1 -T 2 |。
Suppose that the time of tripping of the transmission line is T 0 The total time period of transmission of the sound waves through the first medium to the positioning device is T 1 -T 0 The propagation velocity of the sound wave in the first medium is V 1 Then, there are:
similarly, the total time period for the sound wave to travel through the second medium to the positioning device is T 2 -T 0 The propagation velocity of the sound wave in the second medium is V 2 Then, there are:
subtracting the equation (1) from the equation (2) yields:
namely, the distance between the trip point of the power transmission line and the positioning device is obtained
The distance D between the tripping point of the power transmission line and the positioning device obtained by the method does not need to know the tripping time of the power transmission line, so that the problem of positioning error caused by reporting error of the tripping time is solved; meanwhile, the characteristic that the propagation speeds of sound waves in different media are different is utilized, and the accurate positioning of the position of the trip point of the power transmission line is realized.
On the basis of the foregoing embodiment, fig. 2 is a schematic structural diagram of another positioning device for a trip point of a power transmission line according to a first embodiment of the present invention, and as shown in fig. 2, the positioning device further includes: a communication unit 400, wherein the communication unit 400 is electrically connected to both the computing unit 200 and the power supply 300.
And a communication unit 400 for transmitting alarm information, wherein the alarm information includes a distance D between the trip point of the power transmission line and the positioning device. Therefore, operation and maintenance personnel can timely process the tripping of the power transmission line, and the power restoration as soon as possible is guaranteed.
Accordingly, the power supply 300 is also used to supply power to the communication unit 400.
In one embodiment, the communication unit 400 is an antenna.
Specifically, fig. 3 is a schematic structural diagram of another positioning device for a trip point of a power transmission line according to an embodiment of the present invention, and as shown in fig. 3, a measurement unit 100 includes: a first measurement subunit 101, a second measurement subunit 102 and a signal processing subunit 103; the signal processing subunit 103 is electrically connected to both the first measuring subunit 101 and the second measuring subunit 102.
The first measurement subunit 101 is configured to acquire a first displacement signal of the acoustic wave transmitted to the positioning device through a first medium;
a second measuring subunit 102, configured to acquire a second displacement signal of the acoustic wave transmitted to the positioning apparatus through a second medium;
the signal processing subunit 103 is electrically connected to both the first measuring subunit 101 and the second measuring subunit 102, and is configured to process the first displacement signal and the second displacement signal and record a first time T 1 And a second time T 2 。
In one embodiment, the first medium and the second medium may be selected according to actual needs. For example, the first medium is a gas and the second medium is a solid; for another example, the first medium is a solid and the second medium is a gas.
Example two
Assuming that the first medium is a gas and the second medium is a solid, as an example, fig. 4 is a schematic structural diagram of a measurement unit provided in a second embodiment of the present invention, as shown in fig. 4, the measurement unit 100 includes: a first measurement subunit 101, a second measurement subunit 102 and a signal processing subunit 103.
Specifically, the first measurement subunit 101 includes: the device comprises an insulating tympanic membrane A, a closed shell B, a piston C and a first displacement meter D.
The insulating eardrum A, the closed shell B and the piston C form a cavity together, and inert gas is filled in the cavity. The insulating eardrum A can be made of rubber, has high strength, hard hardness and corrosion resistance, and can adapt to severe weather environments such as open air and the like; the closed shell B can be made of plastic steel, glass, ceramic and other materials, and has good air tightness; the inert gas may be a stable and non-toxic gas such as at least one of helium and neon. The first displacement gauge D has a probe, which is connected to the piston C.
When sound waves are transmitted to the insulating tympanic membrane a through air, the insulating tympanic membrane a vibrates, and the vibration is transmitted to the inert gas, so that the inert gas drives the piston C to reciprocate, and the first displacement meter D receives vibration signals transmitted by the probe and converts the vibration signals into first displacement signals.
The second measurement subunit 102 includes: the iron tower contacts the probe tip E and the second displacement gauge F. One end of the iron tower contact probe head E is in contact with the iron tower, and the other end of the iron tower contact probe head E is connected with the probe of the second displacement meter F.
When sound waves are transmitted to the iron tower contact probe head E through the iron tower, the iron tower contact probe head E vibrates, and the vibration is transmitted to the second displacement meter F through the probe of the second displacement meter F, so that the second displacement meter F receives vibration signals transmitted by the probe and converts the vibration signals into second displacement signals.
The signal processing subunit 103 is connected to the first displacement meter D and the second displacement meter F through wires, and is configured to receive the first displacement signal and the second displacement signal and record a first time T 1 And a second time T 2 And stores the first and second displacement signals.
When the transmission line trips, a sound wave is generated and is transmitted to a positioning device of a tripping point of the transmission line through two different media. Due to the different propagation velocities of the sound waves in the different media, the first time T at which the sound waves are transmitted through the first medium to the positioning device 1 And a second time T at which the acoustic wave is transmitted to the positioning device through a second medium 2 There is a time difference Δ T, Δ T = | T between them 1 -T 2 |。
Suppose that the time of tripping of the transmission line is T 0 The total time period for transmitting the sound wave to the positioning device through the first medium is T 1 -T 0 The propagation velocity of the sound wave in the first medium is V 1 Then, there are:
similarly, the total time period for the sound wave to be transmitted to the positioning device through the second medium is T 2 -T 0 The propagation velocity of the sound wave in the second medium is V 2 Then, there are:
subtracting equation (4) from equation (3) yields:
namely, the distance between the trip point of the power transmission line and the positioning device is obtained
The distance D between the tripping point of the power transmission line and the positioning device obtained by the method does not need to know the tripping time of the power transmission line, so that the problem of positioning error caused by reporting error of the tripping time is solved; meanwhile, the characteristic that the propagation speeds of sound waves in different media are different is utilized, and the position of the trip point of the power transmission line is accurately positioned.
The invention provides a positioning device for trip points of a power transmission line, which comprises: a measuring unit, a calculating unit and a power supply; wherein the measuring unit is used for measuring the first time T 1 And a second time T 2 Wherein the first time T 1 The time of transmission of the sound wave through the first medium to the positioning device, the second time T 2 The time when the sound wave is transmitted to the positioning device through the second medium is determined, and the sound wave is generated based on the tripping of the power transmission line; the calculating unit is electrically connected with the measuring unit and is used for measuring the first time T 1 And a second time T 2 Calculating the distance D between the trip point of the power transmission line and the positioning device; and the power supply is used for supplying power to the calculating unit and the measuring unit. The positioning device for the trip point of the power transmission line provided by the invention utilizes the characteristic that the propagation speeds of sound waves in different media are different, the position of the trip point of the power transmission line is accurately positioned, and the problem of inaccurate positioning of the trip point of the power transmission line is solved.
It is to be noted that the foregoing description is only exemplary of the invention and that the principles of the technology may be employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (8)
1. A positioning device for a trip point of a power transmission line, the positioning device comprising: a measuring unit, a calculating unit and a power supply; wherein, the first and the second end of the pipe are connected with each other,
the measuring unit is used for measuring the first time T 1 And a second time T 2 Wherein the first time T 1 The time of transmission of sound waves to the positioning device through the first medium, the second time T 2 Transmitting the sound wave to the positioning device through a second medium, wherein the sound wave is generated based on tripping of the transmission line;
the calculating unit is electrically connected with the measuring unit and is used for calculating the first time T 1 And said second time T 2 Calculating the distance D between the trip point of the power transmission line and the positioning device;
the power supply is used for supplying power to the computing unit and the measuring unit;
the measurement unit includes: the device comprises a first measuring subunit, a second measuring subunit and a signal processing subunit;
the first measuring subunit is used for acquiring a first displacement signal of the sound wave transmitted to the positioning device through the first medium;
the second measuring subunit is used for acquiring a second displacement signal transmitted by the sound wave to the positioning device through the second medium;
the signal processing subunit is electrically connected with the first measuring subunit and the second measuring subunit, and is used for processing the first displacement signal and the second displacement signal and recording the second displacement signalA time T 1 And said second time T 2 ；
The first measurement subunit includes: the device comprises an insulating tympanic membrane, a closed shell, a piston and a first displacement meter; the insulating tympanic membrane, the closed shell and the piston form a cavity together, inert gas is filled in the cavity, and a probe of the first displacement meter is connected with the piston;
when the sound waves are transmitted to the insulation eardrum through air, the insulation eardrum vibrates and drives the piston to reciprocate, so that the first displacement meter obtains a first displacement signal.
2. The positioning device of claim 1, wherein the distance D between the trip point of the power transmission line and the positioning device is calculated by the following formula:
wherein, V 1 Is the propagation velocity, V, of the acoustic wave in the first medium 2 Is the propagation velocity of the acoustic wave in the second medium.
3. The positioning device of claim 1, further comprising: a communication unit;
the communication unit is electrically connected with the calculation unit and the power supply and is used for sending alarm information, and the alarm information comprises the distance D between the trip point of the power transmission line and the positioning device.
4. The positioning apparatus of claim 3, wherein the communication unit is an antenna.
5. The positioning apparatus of claim 1, wherein the first medium is a gas and the second medium is a solid.
6. The positioning device of claim 5, wherein the second measurement subunit comprises: the iron tower contacts the probe head and the second displacement meter; one end of the iron tower contact probe head contacts the iron tower, and the other end of the iron tower contact probe head is connected with the probe of the second displacement meter;
when the sound waves are transmitted to the iron tower contact probe head through the iron tower, the iron tower contact probe head vibrates, and therefore the second displacement meter obtains a second displacement signal.
7. The positioning apparatus according to claim 1, wherein the signal processing subunit is further configured to store the first displacement signal and the second displacement signal.
8. The positioning device of claim 1,
the insulating eardrum is made of rubber; the material of the closed shell is any one of plastic steel, glass and ceramic; the inert gas is at least one of helium and neon.
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| WO2018171240A1 (en) * | 2017-03-22 | 2018-09-27 | 南京南瑞继保电气有限公司 | Method and system for protection against disconnection of power transmission and distribution lines |
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| CN103777115A (en) * | 2014-02-13 | 2014-05-07 | 西南交通大学 | Electric transmission line single-terminal positioning method based on fault transient state and steady-state signal wave velocity difference |
| CN105911426A (en) * | 2016-04-15 | 2016-08-31 | 西南交通大学 | Cable joint crack positioning device based on sound wave signal |
| WO2018171240A1 (en) * | 2017-03-22 | 2018-09-27 | 南京南瑞继保电气有限公司 | Method and system for protection against disconnection of power transmission and distribution lines |
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