CN112362751A - Online monitoring method and system for power transformation framework - Google Patents
Online monitoring method and system for power transformation framework Download PDFInfo
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 49
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- 239000000523 sample Substances 0.000 claims abstract description 25
- 238000012806 monitoring device Methods 0.000 claims description 25
- 238000004891 communication Methods 0.000 claims description 9
- 239000013307 optical fiber Substances 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 230000001066 destructive effect Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 15
- 230000035882 stress Effects 0.000 description 14
- 238000006467 substitution reaction Methods 0.000 description 3
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- 230000007774 longterm Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004643 material aging Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/14—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H5/00—Buildings or groups of buildings for industrial or agricultural purposes
- E04H5/02—Buildings or groups of buildings for industrial purposes, e.g. for power-plants or factories
- E04H5/04—Transformer houses; Substations or switchgear houses
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/18—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using ultrasonic, sonic, or infrasonic waves
- G01S5/20—Position of source determined by a plurality of spaced direction-finders
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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Abstract
本发明提供一种变电构架在线监测方法及系统，包括：通过检测变电构架的横梁的应力值确定容易产生破损的目标区域；触发与所述目标区域最近且大于位于所述目标区域以外的两个声发射探头；根据接收的声发射信号确定横杆发生破损的具体位置；分析所述声发射信号，判断破损影响程度；根据破损影响程度生产不同级别的报警信息。本发明通过判断变电构架横梁的应力确定破损检测的目标区域，从而进行目标区域定位破损的具体位置，提高破损检测的精准度。
The present invention provides an on-line monitoring method and system for a substation structure, including: determining a target area that is prone to damage by detecting the stress value of a beam of the substation frame; Two acoustic emission probes; determine the specific location where the crossbar is damaged according to the received acoustic emission signal; analyze the acoustic emission signal to determine the degree of damage; produce different levels of alarm information according to the degree of damage. The invention determines the target area of damage detection by judging the stress of the beam of the substation frame, so as to locate the specific position of damage in the target area and improve the accuracy of damage detection.
Description
Technical Field
The invention belongs to the technical field of electric power engineering, and particularly relates to a method and a system for on-line monitoring of a power transformation framework.
Background
As power engineering is rapidly developed and the electrical wiring form and equipment are required to be compactly arranged, a power transformation framework is concerned as an important structure of a power distribution device field, and the framework of a transformer substation is generally a steel structure, has a door shape, a pi shape and the like, and is used for hanging conductors, supporting conductors or switching equipment and other electrical equipment; the safety and reliability of the transformer substation directly affect the working performance of the power transmission and transformation equipment and the normal operation of the transformer substation and the whole power system.
In the design, manufacture, transportation and installation processes of a power transformation framework, the damage accumulation of the structure is inevitably caused by the erosion, material aging, artificial damage and the like of environmental disasters, so that potential safety hazards are caused to the operation of a transformer substation. The cross beam of the power transformation framework is used as an important weighing structure, and is arranged transversely, so that compared with other structural parts of the power transformation framework, the cross beam is more easily damaged and destroyed, the damage is generated, and the stability of the power transformation framework can be influenced after long-term repair; at present, the detection of the damage is mainly to perform local scrutiny after manual inspection, such as ray detection, ultrasonic detection, electromagnetic detection, and the like, and the defects of the methods include limitation on the shape of an object to be detected, power supply detection, and great limitation on the existing monitoring mode.
Disclosure of Invention
In order to overcome the above-mentioned shortcomings in the prior art, the present invention provides a method and a system for online monitoring of a power transformation framework.
In a first aspect, the present invention provides a method for on-line monitoring of a power transformation framework, including:
determining a target area which is easy to damage by detecting the stress value of a cross beam of the power transformation framework;
triggering two acoustic emission probes which are closest to the target area and are larger than the two acoustic emission probes positioned outside the target area;
determining the specific position of the cross bar damaged according to the received acoustic emission signals;
analyzing the acoustic emission signal and judging the damage influence degree;
and producing alarm information of different levels according to the damage influence degree.
Further, the method determines the specific position of the cross bar breakage according to the received acoustic emission signal, and comprises the following steps:
acquiring the time difference between the sound emission source and the two sound emission probes, and obtaining the monitoring distance between the sound emission source and the closer sound emission probe according to the time difference, the sound wave propagation speed and the total distance between the two sound emission probes, wherein the calculation formula is as follows: the distance is monitored 1/2 (total distance-time difference propagation velocity).
In a second aspect, the present invention provides an on-line monitoring system for a power transformation framework, including:
the optical fiber stress sensor is used for monitoring the stress value of a beam of the power transformation framework on line so as to find a target area with larger stress;
the acoustic emission nondestructive monitoring device is used for monitoring whether a target area on the power transformation framework is damaged or not through the characteristics of acoustic emission;
and the monitoring center is used for comprehensively processing monitoring data and remotely sending a control signal, and the optical fiber stress sensor sound and emission nondestructive monitoring device is in communication connection with the monitoring center.
Further, the acoustic emission nondestructive monitoring device comprises: the acoustic emission sensor is connected with the signal amplifier, and the signal amplifier is connected with the acoustic emission collector; the acoustic emission sensor is provided with a plurality of acoustic emission probes, and a plurality of acoustic emission probes are equidistantly arranged on the power transformation framework cross beam.
Further, the system further comprises: the sinking monitoring device is used for monitoring the sinking distance of the power transformation framework; the sinking monitoring device comprises displacement sensors arranged on each bracket of the power transformation framework; and the sinking monitoring device is in communication connection with the monitoring center.
Further, the system further comprises a real-time image monitoring device, the real-time image monitoring device is in communication connection with the monitoring center, and the real-time image monitoring device comprises:
the image acquisition unit is used for acquiring image information of the power transformation framework;
and the fault judging unit is used for acquiring a characteristic value based on the image information and the image difference of the initial image model and identifying the characteristic value according to a preset characteristic model.
Further, the system further comprises:
the alarm execution device is used for executing sound-light alarm according to the monitoring result issued by the monitoring system; and the alarm execution device is in communication connection with the monitoring center.
The beneficial effect of the invention is that,
according to the on-line monitoring method and system for the power transformation framework, the target area of damage detection is determined by judging the stress of the cross beam of the power transformation framework, so that the specific position of damage of the target area is located, and the precision of damage detection is improved; and the sinking displacement of the framework is monitored, image monitoring with multiple expanded functions is provided, bird repelling, inclination monitoring and other obvious fault monitoring are conveniently carried out according to images, and the usability of the system is improved.
In addition, the invention has reliable design principle, simple structure and very wide application prospect.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic view of acoustic emission breakage location in accordance with one embodiment of the present invention.
FIG. 2 is a block flow diagram of a method of one embodiment of the invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all 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.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example 1
As shown in fig. 2, the present embodiment provides a method for online monitoring a power transformation framework, including:
and 150, producing alarm information of different levels according to the damage influence degree.
Specifically, the method comprises the following steps:
s1, determining a target area which is easy to damage by detecting the stress value of the cross beam of the power transformation framework; the target area is screened before detection, and the area with poor bearing capacity is subjected to key investigation, so that the monitoring efficiency is improved;
s2, after the target area is locked, triggering two acoustic emission probes which are closest to the target area and are larger than the two acoustic emission probes outside the target area; as shown in fig. 1, the two acoustic emission probes a and B are closest to the two ends of the target region; the acoustic emission technology is one of nondestructive detection technologies, and has the advantages that: acoustic emission detects conditions within the material, not surface conditions;
s3, determining the specific position of the cross bar damaged according to the received acoustic emission signals; according to the characteristics of acoustic emission, the damaged fault point is an emission source C, the time difference Δ t between the emission source C and the two acoustic emission probes is obtained, the monitoring distance D between the acoustic emission source and the closer acoustic emission probe a can be obtained according to the time difference Δ t, the acoustic wave propagation speed V and the total distance S between the two acoustic emission probes A, B, and the calculation formula is as follows: d-1/2 (S- Δ t × V); the obtained monitoring distance D is the distance between the emission source C and the emission source A, so that the specific position of the damaged fault point is positioned;
s4, analyzing the acoustic emission signal, and judging the damage influence degree according to the acoustic emission signal; and alarm information of different levels is produced according to the damage influence degree.
The monitoring principle of acoustic emission is that an object generates and emits a signal under the action of external conditions (force, heat, electricity, magnetism, etc.), thereby judging the information of the internal state or defect property of a material.
In the embodiment, the target area of damage detection is determined by judging the stress of the power transformation framework beam, and the specific position of the damage of the target area is located by adopting a time difference positioning method, so that the precision of the damage detection is improved, and the passive dynamic monitoring of the power transformation framework is realized.
Example 2
The invention provides a power transformation framework on-line monitoring system, which comprises:
the optical fiber stress sensor is used for monitoring the stress value of a beam of the power transformation framework on line so as to find a target area with larger stress;
the acoustic emission nondestructive monitoring device is used for monitoring whether a target area on the power transformation framework is damaged or not through the characteristics of acoustic emission;
the sinking monitoring device is used for monitoring the sinking distance of the power transformation framework; the sinking monitoring device comprises displacement sensors arranged on each bracket of the power transformation framework;
the alarm execution device is used for executing sound-light alarm according to the monitoring result issued by the monitoring system;
and the monitoring center is used for comprehensively processing monitoring data and remotely sending control signals, and the optical fiber stress sensor sound and emission nondestructive monitoring device, the sinking monitoring device and the alarm execution device are all in communication connection with the monitoring center.
The acoustic emission nondestructive monitoring device includes: the acoustic emission sensor is connected with the signal amplifier, and the signal amplifier is connected with the acoustic emission collector; the acoustic emission sensor is provided with a plurality of acoustic emission probes, and a plurality of acoustic emission probes are equidistantly arranged on the power transformation framework cross beam. The acoustic emission signal is a high-frequency signal, generally more than tens of hertz, and the acoustic emission collector adopts an AMSY-6 acoustic emission collection analyzer.
According to the method, the target area of the damage detection is determined by judging the stress of the power transformation framework beam, so that the specific position of the damage of the target area is located, and the precision of the damage detection is improved; and the sinking displacement of the framework is monitored, the sinking condition of the power transformation framework is judged, and the stability of the power transformation framework is further ensured.
Example 3
This embodiment provides a transformer framework on-line monitoring system, and this embodiment has increased real-time picture monitoring devices on the basis of embodiment 2, real-time picture monitoring devices includes:
the image acquisition unit is used for acquiring image information of the power transformation framework;
the fault judging unit is used for acquiring a characteristic value based on the image information and the image difference of the initial image model and identifying the characteristic value according to a preset characteristic model;
according to the embodiment, bird intrusion judgment, framework inclination monitoring and other obvious fault monitoring can be carried out according to image identification, namely, an extensible interface is provided for realizing more functions according to requirements, and the usability of the system is improved.
Although the present invention has been described in detail by referring to the drawings in connection with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A method for monitoring a power transformation framework on line is characterized by comprising the following steps:
determining a target area which is easy to damage by detecting the stress value of a cross beam of the power transformation framework;
triggering two acoustic emission probes which are closest to the target area and are larger than the two acoustic emission probes positioned outside the target area;
determining the specific position of the cross bar damaged according to the received acoustic emission signals;
analyzing the acoustic emission signal and judging the damage influence degree;
and producing alarm information of different levels according to the damage influence degree.
2. A method for on-line monitoring of a power transformation architecture as recited in claim 1, further comprising:
acquiring the time difference between the sound emission source and the two sound emission probes, and obtaining the monitoring distance between the sound emission source and the closer sound emission probe according to the time difference, the sound wave propagation speed and the total distance between the two sound emission probes, wherein the calculation formula is as follows: the distance is monitored 1/2 (total distance-time difference propagation velocity).
3. A power transformation framework on-line monitoring system is characterized by comprising:
the optical fiber stress sensor is used for monitoring the stress value of a beam of the power transformation framework on line so as to find a target area with larger stress;
the acoustic emission nondestructive monitoring device is used for monitoring whether a target area on the power transformation framework is damaged or not through the characteristics of acoustic emission;
and the monitoring center is used for comprehensively processing monitoring data and remotely sending a control signal, and the optical fiber stress sensor sound and emission nondestructive monitoring device is in communication connection with the monitoring center.
4. A power transformation framework on-line monitoring system as claimed in claim 3, wherein said acoustic emission non-destructive monitoring device comprises: the acoustic emission sensor is connected with the signal amplifier, and the signal amplifier is connected with the acoustic emission collector; the acoustic emission sensor is provided with a plurality of acoustic emission probes, and a plurality of acoustic emission probes are equidistantly arranged on the power transformation framework cross beam.
5. A power transformation framework on-line monitoring system as claimed in claim 3, wherein said sinking monitoring means is adapted to monitor the sinking distance of the power transformation framework; the sinking monitoring device comprises displacement sensors arranged on each bracket of the power transformation framework; and the sinking monitoring device is in communication connection with the monitoring center.
6. A power transformation framework on-line monitoring system as claimed in claim 3, wherein said system further comprises a real-time image monitoring device, said real-time image monitoring device is in communication connection with said monitoring center, said real-time image monitoring device comprises:
the image acquisition unit is used for acquiring image information of the power transformation framework;
and the fault judging unit is used for acquiring a characteristic value based on the image information and the image difference of the initial image model and identifying the characteristic value according to a preset characteristic model.
7. A power transformation framework on-line monitoring system as claimed in claim 3, further comprising:
the alarm execution device is used for executing sound-light alarm according to the monitoring result issued by the monitoring system; and the alarm execution device is in communication connection with the monitoring center.
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| CN202011025148.2A CN112362751A (en) | 2020-09-25 | 2020-09-25 | Online monitoring method and system for power transformation framework |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114842624A (en) * | 2022-04-06 | 2022-08-02 | 国网山东省电力公司日照供电公司 | High-voltage cable tunnel state sensing system and method |
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| CN114842624A (en) * | 2022-04-06 | 2022-08-02 | 国网山东省电力公司日照供电公司 | High-voltage cable tunnel state sensing system and method |
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