CN110361126A - A kind of method and its sensing device for transmission line icing load monitoring - Google Patents
A kind of method and its sensing device for transmission line icing load monitoring Download PDFInfo
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- CN110361126A CN110361126A CN201910740077.5A CN201910740077A CN110361126A CN 110361126 A CN110361126 A CN 110361126A CN 201910740077 A CN201910740077 A CN 201910740077A CN 110361126 A CN110361126 A CN 110361126A
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- interconnecting piece
- sensing device
- circuit
- transmission line
- load monitoring
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
- G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
- G01L5/047—Specific indicating or recording arrangements, e.g. for remote indication, for indicating overload or underload
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
- G01L5/10—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Emergency Alarm Devices (AREA)
- Electric Cable Installation (AREA)
Abstract
The invention discloses a kind of method for transmission line icing load monitoring, digital quantity including MCU acquisition mechanics sensor output is calculated tension, obtains icing alarm threshold value, data are uploaded to rear end, rear end if beyond alarm threshold value carrying out ice covering thickness calculating to tension data.The invention also discloses a kind of sensing devices for transmission line icing load monitoring, including sensing element, upper interconnecting piece and lower connecting component, the sensing element includes a hollow shell, enclosure interior is built-in with mechanics sensor, there are the upper interconnecting piece connecting with fitting interconnecting piece and the lower connecting component connecting with insulator interconnecting piece, the upper interconnecting piece and lower connecting components to use consistent construction for shell top and the bottom.The present invention solve the problems, such as simultaneously sensor due to customize can not get ready the goods in batches and different tower position between can not replace mutually the problem of, the effective efficiency for improving O&M；The inevitable price of mass simultaneous stock can be lowered, and have certain economic benefit.
Description
Technical field
The present invention relates to a kind of methods and its sensing device for transmission line icing load monitoring, especially a kind of for electricity
The method and its sensing device of Lixing industry powerline ice-covering load monitoring.
Background technique
Powerline ice-covering is easy to cause the generation of electric power accident, influences the normal operation of route.
Powerline ice-covering will lead to that load of roadway is excessive, and arc sag becomes larger, and grounded-line can jump when ice-melt, serious shadow
The normal reliable rung to route is run.Most directly harm is exactly grounded-line, fitting, tower body load to transmission line icing, with icing
The load for being continuously increased overhead transmission line of thickness also constantly increases, it is serious will lead to grounded-line it is stranded/fracture, fitting damage
It is bad, even can lead to shaft tower and collapse.
It is generally monitored at present by Mechanical Method for transmission line icing, common method is exactly to pass through setting and tower body gold
Integrated mechanics sensor with identical connection structure removes the fitting between replacement insulator and shaft tower, to realize to insulator
And the real-time monitoring of line load.
It is an integral structure to the current mechanics sensor in monitoring icing, possesses a closed shell, shell
Built-in strain sensing device, housing sidewall issue the entry/exit line mouth communicated with housing cavity, and position has and gold shell up and down
Tool or the integrated formed structure of insulator connection, can not be split.
Since route serial type, the tonnage of every Ji Ta of power supply line have a possibility that inconsistent, produce every time
Mechanics sensor is both needed to " customize ", and the mechanics sensor of different model and tonnage is produced according to actual serial type, as QP bulb,
The sensor of the different models such as QH bulb, U-shaped ring, Z hanging plate, ZS hanging plate, ZH link；Tonnage have 7 tons, 10 tons, 12 tons, 16 tons,
21 tons, 25 tons, 30 tons, 32 tons, 42 tons, 55 tons, 64 tons, 84 tons, 110 tons, 168 tons etc..
Moreover, mechanics sensor geomery of different model, tonnage etc. is different, can not replace mutually, in reality
In, many inconvenience often are brought to operation and maintenance.
Existing mechanics sensor is due to using integrated molding structure, to guarantee that field uses and intensity, shell generally select
The features such as being made of special stainless steel, making it have antirust, dust-proof, waterproof, corrosion-resistant, strong antijamming capability, high intensity.
Existing mechanics sensor is produced for proof strength using special stainless steel, and production difficulty is higher, complex process, because
This production duration is longer, generally requires at least one month, leverages the operation and maintenance timeliness of device, especially exist
When needing to guarantee that equipment operates normally annual icing season.
The problems such as long in time limit, can not be replaced and be produced to above-mentioned customization, and will result directly in sensor can not get ready the goods in batches,
Influence the monitoring of power supply line's icing load.
Summary of the invention
The technical problems to be solved by the present invention are:
Invent a kind of method and its sensing device for transmission line icing load monitoring, solve the sensors of different tower positions without
The problem of method is replaced mutually, and solve the problems, such as that sensor production is long in time limit, can not get ready the goods in batches simultaneously.
The technical scheme is that
A method of for transmission line icing load monitoring, comprising the following steps:
A mechanics sensor) is connected to insulator chain upper end；
B) deformation is generated when effect of the mechanics sensor by power such as power transmission cable gravity；
C) strain bridge analog output built-in on mechanics sensor changes；
D) strain bridge output analog quantity is amplified by amplifying circuit；
E) A/D conversion is carried out after analog quantity amplification；
F) MCU carries out Mechanics Calculation to the digital quantity that acquisition returns, and exports tension value；
G) according to formula
R=ρ L/S
In formula: ρ indicates the resistivity of metallic conductor, and L indicates conductor length, and S indicates conductor cross-sectional area；
By measuring resistance value, the strained situation of strain transducer is calculated, to count via can be calculated mechanics numerical value
Calculate formula:
σ is tension in formula, and R is resistance value, and E is elasticity modulus of materials, and K is gage factor；
When H) just filling, mechanics sensing device is initial strength value according to the confirmation command current tensile value that commissioning staff provides,
And it records and is stored in memory module；Operation maintenance personnel calculates data according to icing and obtains alarm threshold value, and is arranged and arrives sensing device
In, while sensing device timing acquisition time is arranged in operation maintenance personnel, every time after the completion of acquisition mechanics sensing device by current tensile
It is compared with first dress tension；
I data) are uploaded to rear end at once if beyond alarm threshold value；Selection is set according to rear end if being no more than to upload
Or it does not upload, and continue to retain and just fill tension value；
J) rear end carries out ice covering thickness calculating to the tension data above sent.
A kind of sensing device for transmission line icing load monitoring, including sensing element, upper interconnecting piece and lower connecting component,
The sensing element includes a hollow shell, and enclosure interior is built-in with mechanics sensor, shell top and the bottom there are with gold
The upper interconnecting piece of tool interconnecting piece connection and the lower connecting component being connect with insulator interconnecting piece, the upper interconnecting piece and lower interconnecting piece
Part uses consistent construction.
The mechanics sensor by strain transducer, signal amplification circuit, analogue signal acquisition circuit, A/D conversion circuit,
MCU circuit, memory module composition, the strain transducer, signal amplification circuit, analogue signal acquisition circuit, A/D conversion electricity
Road, MCU circuit, memory module are sequentially electrically connected, and the MCU circuit is provided with the communication port for exporting monitoring data.
The MCU circuit stores and runs the step E according to the method for transmission line icing load monitoring) to J's)
Computer program.
Preferably, the upper interconnecting piece is connected with lower connecting component using screw-type connection or bolt type.
The beneficial effects of the present invention are:
Since the sensing element structure of identical tonnage is consistent, O&M unit is former according to different tonnage sensing devices over the years
Barrier rate only needs to change sensing element in O&M for the sensing element of a certain amount of different tonnages, does not have to replacement fitting and connects
Socket part and insulator interconnecting piece, can be to avoid between different towers the problem of fitting not intercommunication.
Usually fitting connecting structure is divided into U-shaped (open-type), template perforation type, ring-like, bulb these types, same ton
The identically constructed connecting portion geomery in position etc. is consistent, therefore this is just the batch of fitting interconnecting piece Yu insulator interconnecting piece
Stock brings possibility.The material that interconnecting piece is selected is relatively conventional electric power material, the special type selected compared to sensing element
Stainless steel material difficulty of processing is lower, it is easier to processing with it is suitable for mass production, simultaneously because this two interconnecting piece is without often more
It changes, therefore O&M unit can refer to the mode of connection gold utensil stock, it is only necessary in batches in case of need for certain goods.
The sensing device of this kind of structure solves the problems, such as sensor since " customization " can not get ready the goods in batches and not simultaneously
The problem of with that can not be replaced mutually between tower position, the effective efficiency for improving O&M.The inevitable price of mass simultaneous stock can be lowered,
With certain economic benefit.
Detailed description of the invention
Fig. 1: sensing element sectional view；
Fig. 2 and Fig. 3: mechanics sensor composition schematic diagram；
Fig. 4: open-type connecting component schematic diagram；
Fig. 5: board-like open cell type connecting component schematic diagram；
Fig. 6: annular attachment member schematic diagram；
Fig. 7: bulb-shaped connecting component schematic diagram；
Fig. 8: sensing device calculates the method flow diagram of icing monitoring；
In figure: 1- sensing element, the upper connecting component of 2-, connecting component under 3-；11- shell, 12- mechanics sensor, 13- go out
Line mouth；121- strain transducer, 122- signal amplification circuit, 123- analogue signal acquisition circuit, 124-A/D conversion circuit,
125-MCU circuit, 126- memory module；3- threaded joints, 41- open-type interconnecting piece, the board-like open cell type interconnecting piece of 42-, 43-
Annular interconnecting piece, 44- bulb-shaped interconnecting piece.
Specific embodiment
The specific embodiment of technical solution of the present invention is described in detail with reference to the accompanying drawing.
As shown in Fig. 7, a method of for transmission line icing load monitoring, comprising the following steps:
A mechanics sensor) is connected to insulator chain upper end；
B) deformation is generated when effect of the mechanics sensor by power such as power transmission cable gravity；
C) strain bridge analog output built-in on mechanics sensor changes；
D) strain bridge output analog quantity is amplified by amplifying circuit；
E) A/D conversion is carried out after analog quantity amplification；
F) MCU carries out Mechanics Calculation to the digital quantity that acquisition returns, and exports tension value；
G) according to formula
R=ρ L/S
In formula: ρ indicates the resistivity of metallic conductor, and L indicates conductor length, and S indicates conductor cross-sectional area
By measuring resistance value, the strained situation of strain transducer is calculated, to count via can be calculated mechanics numerical value
Calculate formula:
σ is tension in formula, and R is resistance value, and E is elasticity modulus of materials, and K is gage factor；
When H) just filling, sensing device is initial strength according to the current stress value of confirmation command that commissioning staff provides, and is remembered
Record is stored in memory module；Operation maintenance personnel calculates data according to icing and obtains alarm threshold value, and is arranged into sensing device, together
When operation maintenance personnel be arranged sensing device timing acquisition time, every time acquisition after the completion of sensing device by current stress and just dress stress
It compares；
I data) are uploaded to rear end at once if beyond alarm threshold value；Selection is set according to rear end if being no more than to upload
Or it does not upload, and continue to retain initial strength value；
J) rear end carries out ice covering thickness calculating to the tension data above sent.
The strain transducer forms strain bridge, built-in to be adsorbed on enclosure internal surface, with strain transducer due to
Mechanical deformation occurs for the effect of power, can generate corresponding resistance change, is believed by the signal amplification circuit and simulation of connection
Number Acquisition Circuit, is transmitted to A/D conversion circuit for collected information and MCU circuit is handled, finally with digital signal side
Formula exports mechanics value.
According to formula resistance R=ρ L/S, (ρ indicates the resistivity of metallic conductor, and L indicates conductor length, and S indicates conductor cross-sectional
Area).It knows when strain transducer is generated deformation by the effect of external force, since length and sectional area also can accordingly become
Change, when strain transducer length is elongated, sectional area becomes smaller, then corresponding resistance value will increase, therefore passes through measurement resistance value
The strained situation of strain transducer can be then calculated, thus via can be calculated mechanics numerical value.
Preferably, when just filling, sensing device is initial strength according to the current stress value of confirmation command that commissioning staff provides,
And it records and is stored in memory module.
Preferably, operation maintenance personnel calculates data according to icing and obtains alarm threshold value, and is arranged into sensing device, same to luck
Sensing device timing acquisition time (acquisition in generally 10~20 minutes is primary) is arranged in dimension personnel, every time sensing dress after the completion of acquisition
It sets and compares current stress and first dress stress, data are uploaded to rear end at once if beyond alarm threshold value, if being no more than
Selection upload is then set according to rear end or does not upload and (continues to retain initial strength value).
As shown in Fig. 1, a kind of sensing device for transmission line icing load monitoring, including sensing element, upper interconnecting piece
With lower connecting component, the sensing element includes a hollow shell, and enclosure interior is built-in with mechanics sensor, above and below shell
There are the upper interconnecting piece connecting with fitting interconnecting piece and the lower connecting component connecting with insulator interconnecting piece, the upper connections in portion
Portion and lower connecting component use consistent construction.
As shown in Fig. 2, the mechanics sensor is by strain transducer, signal amplification circuit, analogue signal acquisition circuit, A/
D conversion circuit, MCU circuit, memory module composition, the strain transducer, signal amplification circuit, analogue signal acquisition circuit,
A/D conversion circuit, MCU circuit, memory module are sequentially electrically connected, and the MCU circuit is provided with for exporting monitoring data
Communication port.
As shown in attached drawing 3-6, connecting component can be open-type, open cell type, annular, bulb-shaped etc..
Preferably, the upper interconnecting piece is connected with lower connecting component using screw-type connection or bolt type.
According to the technique and scheme of the present invention, mechanics sensing device of the invention consists of three parts, and first part is sensing
Component, second part are the interconnecting piece (being referred to as fitting interconnecting piece in the present invention) connecting with fitting, and Part III is sensing
Another interconnecting piece (being referred to as insulator interconnecting piece in the present invention) that component is connect with insulator.
In order to realize purpose that sensing device can be replaced mutually, first part has and can connect with fitting interconnecting piece, insulator
The structure that portion is vertically connected with, according to practical serial type, can freedom combined with second part or Part III.
Due to a string of line hardware string one and only one insulators, a sensing device at most can be with two fittings
Interconnecting piece is vertically connected with, or can on a fitting interconnecting piece connect and connected under an insulator interconnecting piece.
Sensing element include a hollow housing, mechanics sensor built in enclosure interior, shell top and the bottom there are with fitting
Interconnecting piece, the connection of insulator interconnecting piece structure, be vertically connected with structure using unified construction, generally use screw-type connection or
Bolt type connection.
Built-in mechanics sensor converts electricity by strain transducer, signal amplification circuit, analogue signal acquisition circuit, A/D
The composition such as road, MCU circuit, memory module.
In order to guarantee intensity, the protective (waterproof and dustproof, anticorrosion etc.), anti-interference of fitting, sensing element is using special
Kind stainless steel production (meeting DL/T 759-2009 standard requirements), the sensing element structure of identical tonnage is consistent.
Fitting interconnecting piece and insulator interconnecting piece use structural carbon steel, low-alloy high-tensile structural steel, structural alloy steel
Equal materials production, outside is using hot galvanizing processing (meeting DL/T 759-2009 standard requirements).Contour structures are generally divided into U-shaped
(open-type), board-like perforation type is ring-like, bulb these types, the connecting portion geomery etc. of the same same contour structures of tonnage
It is consistent.
Claims (3)
1. a kind of method for transmission line icing load monitoring, it is characterised in that the following steps are included:
A mechanics sensor) is connected to insulator chain upper end；
B) deformation is generated when effect of the mechanics sensor by power such as power transmission cable gravity；
C) strain bridge analog output built-in on mechanics sensor changes；
D) strain bridge output analog quantity is amplified by amplifying circuit；
E) A/D conversion is carried out after analog quantity amplification；
F) MCU carries out Mechanics Calculation to the digital quantity that acquisition returns, and exports tension value；
G) according to formula
R=ρ L/S
In formula: ρ indicates the resistivity of metallic conductor, and L indicates conductor length, and S indicates conductor cross-sectional area；
By measuring resistance value, the strained situation of strain transducer is calculated, to calculate public via can be calculated mechanics numerical value
Formula
σ is tension in formula, and R is resistance value, and E is elasticity modulus of materials, and K is gage factor；
When H) just filling, the confirmation command that sensing device is provided according to commissioning staff is currently initial strength value by tension value, and is recorded
It is stored in memory module；Operation maintenance personnel calculates data according to icing and obtains alarm threshold value, and is arranged into sensing device, simultaneously
Operation maintenance personnel be arranged sensing device timing acquisition time, every time acquisition after the completion of sensing device will currently by tension and just dress by
Power compares；
I data) are uploaded to rear end at once if beyond alarm threshold value；According to rear end setting selection upload or not if being no more than
It uploads, and continues to retain and just fill tension value；
J) rear end carries out ice covering thickness calculating to the tension data above sent.
2. a kind of sensing device for transmission line icing load monitoring, it is characterised in that: including sensing element, upper interconnecting piece and under
Connecting component, the sensing element include a hollow shell, and enclosure interior is built-in with strain transducer, and shell top and the bottom are equal
There are the upper interconnecting piece being connect with fitting interconnecting piece and the lower connecting component being connect with insulator interconnecting piece, the upper interconnecting piece and
Lower connecting component uses consistent construction；
The mechanics sensor is by strain transducer, signal amplification circuit, analogue signal acquisition circuit, A/D conversion circuit, MCU
Circuit, memory module composition, the strain transducer, signal amplification circuit, analogue signal acquisition circuit, A/D conversion circuit,
MCU circuit, memory module are sequentially electrically connected, and the MCU circuit is provided with the communication port for exporting monitoring data；
The step of MCU circuit stores and runs the method according to claim 1 for transmission line icing load monitoring
E) to the computer program of J).
3. the sensing device according to claim 2 for transmission line icing load monitoring, it is characterised in that: the upper connection
Portion is connected with lower connecting component using screw-type connection or bolt type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910740077.5A CN110361126A (en) | 2019-08-12 | 2019-08-12 | A kind of method and its sensing device for transmission line icing load monitoring |
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| CN201910740077.5A CN110361126A (en) | 2019-08-12 | 2019-08-12 | A kind of method and its sensing device for transmission line icing load monitoring |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112572728A (en) * | 2020-12-16 | 2021-03-30 | 大连理工大学 | Ship bow ice load testing system based on shear strain and identification method |
| CN114067539A (en) * | 2021-11-05 | 2022-02-18 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Power equipment monitoring system and wire monitoring device thereof |
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