CN108692690A - A kind of transmission line of electricity equivalence ice covering thickness monitoring system and method - Google Patents
A kind of transmission line of electricity equivalence ice covering thickness monitoring system and method Download PDFInfo
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Abstract
The present invention provides a kind of transmission line of electricity equivalence ice covering thickness to monitor system and method, which includes conducting wire obliquity sensor and/or insulator chain obliquity sensor and master controller;The conducting wire obliquity sensor is installed at conducting wire hanging point, and the insulator chain obliquity sensor is installed on suspension insulator, and the master controller is installed on cross arm of tower;The conducting wire obliquity sensor and/or the insulator chain obliquity sensor are communicated to connect with the master controller.The system easily and accurately realizes the monitoring to wire icing of transmission line, meets the requirement of power department early warning, monitoring.
Description
Technical field
The invention belongs to field of on-line monitoring of transmission lines more particularly to a kind of transmission line of electricity equivalence ice covering thickness monitoring systems
System and method.
Background technology
Anti-icing anti-ice is all the most important thing of Research Work of Power Transmission Line over the years, at present the monitoring of equivalent ice covering thickness both at home and abroad
Method is varied, including the equivalent diagnostic method of tilt-angle method, weight method, image, Meteorological Act etc..Widely used is weight method
With two kinds of tilt-angle method.But there is also certain defect and deficiency, main bodies for the equivalent ice covering thickness technology based on both methods
Present the following aspects:
The deficiency of weight method equivalence ice covering thickness monitoring technology has:One, it is relatively specific for tangent tower, and is poorly suitable for resistance to
Open tower:Based on weight method be to the vertical loads change in vertical span be monitored come indirect monitoring equivalence ice covering thickness this
Basic principle, unsuitable under strain insulator occasion to be monitored to ice covering thickness with weight method, this greatly affected icing
The alternative that monitoring device is layouted;Two, current insulator chain pulling force sensor is using to replace based on ball-eye
Mounting means, operating process complexity is cumbersome, is unfavorable for in-site installation and maintenance work;Three, the gold utensil type kind replaced is numerous
More, structure is different, and the model for resulting in insulator chain pulling force sensor is numerous, can not be interchangeable between each other;Four, it carries out
The replacement of line hardware increases hidden danger to the safe operation of circuit.
The deficiency of tilt-angle method equivalence ice covering thickness monitoring technology has:One, power system design existing defects:Previous conducting wire
Inclination angle and temperature sensor take can existing defects in mode, due to the use of be conducting wire induction energy fetching mode, this takes can pattern
The normal operation of lower sensor depend heavilys on the degree of stability (scope of application is small) of current in wire, therefore power-supply system runs one
Straight unstable, the failure rate of sensor remains high always.Two, the accuracy of monitoring data is poor:Studies have shown that causing to monitor
The reason of poor accuracy, mainly there are three aspects:1) conducting wire tilt-angle method needs high-precision conducting wire inclination angle monitoring sensor and props up
Support, class of accuracy need within 0.1 °;2) under strong wind operating mode, conducting wire is kept in motion, if only letter at this time
Single ground samples conducting wire inclination data, does not take filtering measure to noise caused by wind load, will greatly influence conducting wire
The accuracy of inclination angle monitoring, the final accuracy for influencing the monitoring of conducting wire equivalence ice covering thickness;3) do not fully consider that insulator chain inclines
The influence that oblique angle monitors icing, under icing operating mode, often there is different degrees of imbalance in suspension insulator both sides
Power, and icing is more serious, unbalanced tensile force difference is more notable, numerical simulation the result shows that, if ignored due to imbalance
The micro variation of conducting wire span caused by power, it will so that the stress of conductor and equivalent ice covering thickness that are finally calculated occur
Larger error.
In conclusion power department needs a kind of accurate effective transmission line of electricity equivalence ice covering thickness monitoring device and is
System to measure and analyze in real time the electric power line ice-covering thickness in actual condition.
Invention content
Based on this, the present invention provides a kind of transmission line of electricity equivalence ice covering thickness to monitor system and method, easily and accurately
The monitoring to wire icing of transmission line is realized, the requirement of power department early warning, monitoring is met.Its technical side specifically used
Case is as follows:
A kind of transmission line of electricity equivalence ice covering thickness monitoring system, including conducting wire obliquity sensor, insulator chain inclination angle sensing
Device and master controller;
The conducting wire obliquity sensor is installed at conducting wire hanging point, and it is exhausted that the insulator chain obliquity sensor is installed on pendency
On edge substring, the master controller is installed on cross arm of tower;The conducting wire obliquity sensor and the insulator chain inclination angle pass
Sensor is communicated to connect with the master controller.
A kind of transmission line of electricity equivalence ice covering thickness monitoring method, includes the following steps:
Obtain unknown state lower wire temperature tn, conducting wire hanging point exit tiltangleθAn, this tower insulator chain tiltangleθBn,
Adjacent tower insulator chain tiltangleθCn;
According to this tower insulator chain length lambda1, adjacent tower insulator chain length lambda2With described tower insulator chain tiltangleθBn,
Adjacent tower insulator chain tiltangleθCn, utilize formula:Δ l=λ1×sinθEn+λ2×sinθcn, calculate span increment Delta l;
According to formula:Δ h=λ1×(1-cosθEn)-λ2×(1-cosθcn), calculate height difference increment Delta h;
According to conducting wire set temperature tmUnder, span l when being carried without outer load and height difference h, utilize formula:
Calculate the height difference angle β under existing spann;
According to conductor dead weight W, the final coefficient of elasticity E of conducting wire, the set temperature tmIt is lower when being carried without outer load
Height difference angle β and conducting wire horizontal stress σm, calculated under set temperature described in existing span lower wire temperature using Newton iteration method,
Conducting wire horizontal stress σ when without external load01, calculation formula is as follows:
Wherein, γ is that conducting wire dead weight ratio carries,
According to conductor temperature linear expansion coefficient α and the set temperature tmLeading under unknown state is calculated using following formula
Line horizontal stress σnIt is integrated with conducting wire than carrying γn:
According to sectional area of wire S, formula is utilized:wn=γn× S is calculated under unknown state, conductor load wn;
According to conductor dead weight W, wire diameter D, formula is utilized:wn=w+0.027728b (b+D) is calculated
Equivalent ice covering thickness b
A kind of transmission line of electricity equivalence ice covering thickness provided by the invention monitors system, the including (output of conducting wire obliquity sensor
Conductor temperature value and conducting wire inclination value), insulator chain obliquity sensor, master controller;Conducting wire obliquity sensor is installed on conducting wire
At hanging point, insulator chain obliquity sensor is installed on suspension insulator, and master controller is installed on cross arm of tower, and conducting wire inclines
Angle transducer and insulator chain obliquity sensor are communicated to connect with master controller, to realize that ice covering thickness monitors.
A kind of transmission line of electricity equivalence ice covering thickness monitoring method provided by the invention.This method fully considers that insulator chain inclines
The influence that oblique angle monitors icing, according to the difference of tower wire body system, by monitoring pattern be divided into the resistance to patterns of Nai-, straight-resistance to pattern and
Directly-straight pattern three classes.By collecting wire characteristic parameter and the conductor temperature of line basis data and the real time measure, insulation
Substring inclination angle and line conductor inclination angle (handling noise caused by excluding wind load by sensor side) calculate and determine transmission of electricity
Equivalent line ice covering thickness, rationally, correctly, algorithm is simple, as a result accurately, and can be suitably used for covering in line tension section for this method
Ice thickness calculates, and conveniently can accurately realize monitoring to ice coated on overhead transmission line conductor, fully meet power department early warning,
The requirement of monitoring.
Above description is only the general introduction of technical solution of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, below with presently preferred embodiments of the present invention and after coordinating attached drawing to be described in detail such as.
The specific implementation mode of the present invention is shown in detail by following embodiment and its attached drawing.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and is constituted part of this application, this hair
Bright illustrative embodiments and their description are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings:
Fig. 1 is that a kind of transmission line of electricity equivalence ice covering thickness provided in an embodiment of the present invention monitors system structure diagram;
Fig. 2 is that another transmission line of electricity equivalence ice covering thickness provided in an embodiment of the present invention monitors system structure diagram;
Fig. 3 is the monitoring pattern schematic diagram of straight-straight pattern;
Fig. 4 is the monitoring pattern schematic diagram of straight-resistance to pattern;
Fig. 5 is the monitoring pattern schematic diagram of the resistance to patterns of Nai-.
Specific implementation mode
In the following, in conjunction with attached drawing and specific implementation mode, the present invention is described further, it should be noted that not
Under the premise of conflicting, new implementation can be formed between various embodiments described below or between each technical characteristic in any combination
Example.
As shown in Figure 1, an embodiment of the present invention provides a kind of transmission line of electricity equivalence ice covering thickness to monitor system, including conducting wire
Obliquity sensor (output lead temperature value and conducting wire inclination value), insulator chain obliquity sensor, master controller;Conducting wire inclination angle passes
Sensor is installed at conducting wire hanging point, and insulator chain obliquity sensor is installed on suspension insulator, and master controller is installed on bar
On tower cross-arm, conducting wire obliquity sensor and insulator chain obliquity sensor are communicated to connect with master controller, to realize instantaneous value
Ice covering thickness monitors.Specifically, communication connection can wirelessly communicate connection, it can also be wire communication connection, implement at one
In example, communicates to connect and connected for radio communication.
Further, as shown in Fig. 2, conducting wire obliquity sensor, is an integral molding structure, sensor side can be transported into row conductor
Dynamic state recognition makes it keep stable state, directly excludes noise caused by wind load.Inside includes mainly:Temperature-dip module,
First communication module, the first power supply module.At the conductor temperature value and conducting wire inclination value that temperature-dip module arrives collection in worksite
Master controller is sent to by first communication module after reason, the first power supply module is powered for entire conducting wire obliquity sensor.
Insulator chain obliquity sensor, is an integral molding structure, and sensor side can carry out guidewire movement state recognition, make it
Stable state is kept, noise caused by wind load is directly excluded.Inside includes mainly:Dip module, second communication module, the second power supply
Module.Dip module by collection in worksite to the processing of insulator chain inclination value after main control sent to by second communication module
Device, power supply module are powered for entire insulator chain obliquity sensor.
In the present embodiment, the first communication module, the second communication module and master controller include radio communication list
Member;By RF (Radio after conductor temperature value and conducting wire the inclination value processing that temperature-dip module arrives collection in worksite
Frequency:Radio frequency) communication modes send master controller to;At the insulator chain inclination value that dip module arrives collection in worksite
After reason master controller is sent to by RF communication modes.Further, first power supply module and second power supply module
Including solar units and lithium iron phosphate storage battery.
Referring to Fig. 3-5, according to the difference of tower wire body system, conducting wire tilt-angle method icing monitoring pattern is divided into three classes, respectively resistance to-
Resistance to pattern (Fig. 5), straight-resistance to pattern (Fig. 4) and straight-straight (Fig. 3) pattern.It is resistance to refer to anchor support tower, directly refer to tangent tower
Tower;The former refers to this tower tower in monitoring pattern representation, the adjacent tower tower that the latter refers to, such as-resistance to mean this
Tower tower is tangent tower, and adjacent tower tower is anchor support.The resistance to mode sensors of Nai-are arranged as:This tower conducting wire obliquity sensor;Directly-
Resistance to mode sensor is arranged as:This tower conducting wire obliquity sensor+this tower insulator chain obliquity sensor;Directly-straight mode sensor
It is arranged as:This tower conducting wire obliquity sensor+this tower insulator chain obliquity sensor+neighbour's tower insulator chain obliquity sensor;Specifically
, the arrangement of insulator chain obliquity sensor and conducting wire obliquity sensor can be found in attached drawing 3-5.
Based on above-mentioned monitoring pattern, the present invention provides a kind of transmission line of electricity equivalence ice covering thickness monitoring methods, specifically such as
Under:
1) basic data for collecting the characterisitic parameter and circuit of conducting wire to be measured, specifically includes following items:
D-wire diameter (mm)
S-sectional area of wire (mm2)
α-conductor temperature linear expansion coefficient (1/ DEG C)
W-conductor dead weight (N/m)
The final coefficient of elasticity of E-conducting wire (N/mm2)
λ1- this tower insulator chain length (m)
λ2- neighbour's tower insulator chain length (m)
2) measure collect conductor temperature be 5 DEG C, without external load when known state parameter, specifically include following items:
tm- known state lower wire temperature (DEG C), this value are defined as 5 DEG C
fmSpan center arc sag (m) under-known state
L-span (m)
H-height difference (m)
β-height difference angle (°)
σmConducting wire horizontal stress (N/mm2) under-known state
2.1) height difference angle β (°) is calculated:
2.2) the conducting wire horizontal stress (N/mm2) under known state is calculated:
γ is known state lower wire than carrying (N/mmm in formula2), it calculates according to the following formula:
3) conducting wire obliquity sensor is mounted on each shelves line conductor according to different tower wire body systems, for measuring in real time
Obliquity sensor is installed at insulator chain hanging point A by line conductor inclination value and conductor temperature value, is insulated for measuring in real time
Substring inclination angle.It measures and collects unknown state parameter:
tn- unknown state lower wire temperature (DEG C)
θAnInclination angle (°) at-unknown state lower wire hanging point exit A
θBnThis tower insulator chain inclination angle (°) under-unknown state
Pay attention to:θBnIt is polarized, is negative when insulator chain rolls oblique to monitoring shelves, otherwise for just.
θCnAdjacent tower insulator chain inclination angle (°) under-unknown state
Pay attention to:θCnIt is polarized, is negative when insulator chain rolls oblique to monitoring shelves, otherwise for just.
4) ice covering thickness b (mm) under unknown state is calculated:
4.1) span increment (m) is calculated:
According to formula:Δ l=λ1×sinλBn+λ2×sinθCn
λ under wherein different monitoring patterns1,λ2,θBn,θCnObtaining value method:
The resistance to monitoring patterns of Nai-:λ1,λ2,θBn,θCnEqual indirect assignment is 0;
Directly-resistance to monitoring pattern:λ2,θCnEqual indirect assignment is 0, λ1,θBnFor actual monitoring value;
Directly-straight monitoring pattern:λ1,λ2,θBn,θCnIt is actual monitoring value.
4.2) height difference increment (m) is calculated:
Δ h=λ1×(1-cosθBn)-λ2×(1-cosθcn)
4.3) height difference angle (m) under existing span is calculated:
4.4) according to Newton iteration method calculate existing span lower wire temperature be 5 DEG C, without external load when conducting wire level answer
Power σ01(N/mm2):
In formula:
γ is that conducting wire dead weight ratio carries,(N/m.mm2)
4.5) the conducting wire horizontal stress σ of unknown state is calculatedn(N/mm2) and conducting wire synthesis is than carrying γn(N/m·mm2):
4.6) unknown state lower wire linear load w is calculatedn(N/m·mm2):
wn=γn×S
4.7) equivalence ice covering thickness b (mm) is calculated:
wn=w+0.027728b (b+D)
According to the above monitoring method, distance explanation, with the conducting wire of certain model LGJ-300/40 as conducting wire to be measured, the prison
Survey pattern is:Directly-straight pattern, the wire characteristic parameter measured needed for ice covering thickness and line basis data being collected into are as follows:
l—450(m)
h—11(m)
fm—5.8(m)
tm—5℃
D—23.94(mm)
S—338.99(mm2)
α—19.6*10-6(1/℃)
W—1133(Kg/Km)
λ1—6.36(m)
λ2—6.36(m)
Transmission line of electricity tilt angle monitoring device is mounted on line conductor to be measured, real-time measure traverse line inclination value and conducting wire temperature
Angle value, the conducting wire inclination value and conductor temperature value sometime measured are respectively:5.6°;-5℃.
Obliquity sensor is installed on insulator chain, measures synchronization this tower insulator chain inclination value and neighbours in real time
Tower insulator chain inclination value is respectively:2°;1.3°.
The present condition conducting wire equivalence ice covering thickness being finally calculated by above-mentioned computation model is:9.01mm.
The present invention fully considers the influence that insulator chain inclination angle monitors icing, is proposed according to different tower wire body systems
Three kinds of conducting wire tilt-angle method icing monitoring patterns, by collecting wire characteristic parameter and line basis data and the real time measure
Conductor temperature, insulator chain inclination angle and line conductor inclination angle (handling noise caused by excluding wind load by sensor side) are counted
Calculate and determine transmission line of electricity equivalence ice covering thickness.The beneficial effects of the present invention are following several respects:First, obliquity sensor body
Small, the light-weight, low cost of product;Secondly, sensor structure is unified, range is unified, is conducive to production, installation, safeguards;Third, phase
For tension method without carrying out gold utensil replacement, on circuit operational safety without influence;4th, there is better performance in strain insulator occasion,
It is particularly suitable for the icing monitoring of isolated shelves, compensates for the deficiency of tension method icing monitoring pattern well;5th, conductor temperature
And obliquity sensor is integrated in the same part (conducting wire obliquity sensor), system structure is concise;6th, it is passed using wireless signal
It is defeated, the shortcomings that cable easily fails because of environmental suitability difference under wire signal transmission mode is overcome, system reliability is improved;
7th, wireless signal uses unified air interface, there is no in physical interface the problem of machinery, electric parameter consistency,
The interchangeability of component is good.8th, realize the real-time monitoring of equivalent ice covering thickness.Therefore, which rationally, correctly, calculates
Method is simple, as a result accurately, easily and accurately realizes to the ice covering thickness monitoring under the uneven icing operating mode of overhead transmission line.
More than, only presently preferred embodiments of the present invention is not intended to limit the present invention in any form;All one's own professions
The those of ordinary skill of industry can be shown in by specification attached drawing and above and swimmingly implement the present invention;But all to be familiar with sheet special
The technical staff of industry without departing from the scope of the present invention, is made a little using disclosed above technology contents
The equivalent variations of variation, modification and evolution are the equivalent embodiment of the present invention;Meanwhile all substantial technologicals according to the present invention
To the variation, modification and evolution etc. of any equivalent variations made by above example, technical scheme of the present invention is still fallen within
Within protection domain.
Claims (10)
1. a kind of transmission line of electricity equivalence ice covering thickness monitors system, which is characterized in that including conducting wire obliquity sensor and/or insulation
Substring obliquity sensor and master controller;
The conducting wire obliquity sensor is installed at conducting wire hanging point, and the insulator chain obliquity sensor is installed on suspension insulator
On string, the master controller is installed on cross arm of tower;The conducting wire obliquity sensor and/or insulator chain inclination angle sensing
Device is communicated to connect with the master controller.
2. a kind of transmission line of electricity equivalence ice covering thickness according to claim 1 monitors system, which is characterized in that the conducting wire
Obliquity sensor is an integral molding structure, including temperature-dip module, first communication module and the first power supply module;Described
One power supply module is connected to the temperature-dip module and the first communication module;The first communication module and the master
Controller communicates to connect;
Alternatively, the insulator chain sensor is an integral molding structure, including dip module, second communication module and the second power supply
Module;Second power supply module is connected to the dip module and the second communication module;The second communication module with
The master controller communication connection.
3. a kind of transmission line of electricity equivalence ice covering thickness according to claim 2 monitors system, which is characterized in that described first
Communication module, the second communication module and master controller include radio frequency communications unit.
4. a kind of transmission line of electricity equivalence ice covering thickness according to claim 3 monitors system, which is characterized in that described first
Power supply module and second power supply module include solar units and lithium iron phosphate storage battery.
5. monitoring system according to a kind of transmission line of electricity equivalence ice covering thickness of claim 1-4 any one of them, which is characterized in that
When conducting wire tilt-angle method icing monitoring pattern is straight-straight pattern, the monitoring system includes at least 2 insulator chains
Obliquity sensor and 1 conducting wire obliquity sensor, the insulator chain obliquity sensor are separately positioned on the exhausted of Ben Ta and adjacent tower
On edge substring, the conducting wire obliquity sensor is arranged at this tower conducting wire hanging point;
When conducting wire tilt-angle method icing monitoring pattern is straight-resistance to pattern, the monitoring system includes at least 1 insulator chain
Obliquity sensor and 1 conducting wire obliquity sensor, the insulator chain obliquity sensor are arranged on this tower insulator chain,
The conducting wire obliquity sensor is arranged at this tower conducting wire hanging point;
When conducting wire tilt-angle method icing monitoring pattern pattern resistance to for Nai-, the monitoring system includes at least 1 conducting wire inclination angle
Sensor, the conducting wire obliquity sensor are arranged at this tower conducting wire hanging point.
6. a kind of transmission line of electricity equivalence ice covering thickness monitoring method, which is characterized in that include the following steps:
Obtain unknown state lower wire temperature tn, conducting wire hanging point exit tiltangleθAn, this tower insulator chain tiltangleθBn, adjacent tower
Insulator chain tiltangleθCn;
According to this tower insulator chain length lambda1, adjacent tower insulator chain length lambda2With described tower insulator chain tiltangleθBn, adjacent tower it is exhausted
Edge substring tiltangleθCn, utilize formula:Δ l=λ1×sinθBn+λ2×sinθCn, calculate span increment Delta l;
According to formula:Δ h=λ1×(1-cosθBn)-λ2×(1-cosθcn), calculate height difference increment Delta h;
According to conducting wire set temperature tmUnder, span l when being carried without outer load and height difference h, utilize formula:
Calculate the height difference angle β under existing spann;
According to conductor dead weight W, the final coefficient of elasticity E of conducting wire, the set temperature tmLower height difference when being carried without outer load
Angle beta and conducting wire horizontal stress σm, calculated under set temperature described in existing span lower wire temperature, without outer lotus using Newton iteration method
Conducting wire horizontal stress σ when load01, calculation formula is as follows:
Wherein, γ is that conducting wire dead weight ratio carries,
According to conductor temperature linear expansion coefficient α and the set temperature tmThe conducting wire water under unknown state is calculated using following formula
Horizontal stress σnIt is integrated with conducting wire than carrying γn:
According to sectional area of wire S, formula is utilized:wn=γn× S is calculated under unknown state, conductor load wn;
According to conductor dead weight W, wire diameter D, formula is utilized:wn=w+0.027728b (b+D) calculates equivalence and covers
Ice thickness b.
7. a kind of transmission line of electricity equivalence ice covering thickness monitoring method according to claim 6, which is characterized in that further include step
Suddenly:The characterisitic parameter of conducting wire to be measured and the basic data of circuit are collected, the characterisitic parameter and basic data include:The conducting wire
Outer diameter D, the sectional area of wire S, the conductor temperature linear expansion coefficient α, conductor dead weight W, the conducting wire
Final coefficient of elasticity E, described tower insulator chain length lambda1With the adjacent tower insulator chain length lambda2。
8. a kind of transmission line of electricity equivalence ice covering thickness monitoring method according to claim 7, which is characterized in that the setting
Temperature tmIt it is 5 DEG C, the monitoring method further includes step:It is 5 DEG C, without known under external load to measure and collect conducting wire set temperature
State parameter, the known state parameter include:Span center arc sag f under known statem, it is the span l and height difference h, described
Height difference angle β and conducting wire horizontal stress σm, wherein the height difference angle
The conducting wire horizontal stressWherein, γ is that known state lower wire ratio carries,
9. according to a kind of transmission line of electricity equivalence ice covering thickness monitoring method of claim 6-8 any one of them, which is characterized in that
λ under different monitoring patterns1,λ2,θBn,θCnValue it is different, wherein
For the resistance to monitoring patterns of Nai-:λ1,λ2,θBn,θCnEqual indirect assignment is 0;
For straight-resistance to monitoring pattern:λ2,θCnEqual indirect assignment is 0, λ1,θBnFor actual monitoring value;
For straight-straight monitoring pattern:λ1,λ2,θBn,θCnIt is actual monitoring value.
10. a kind of transmission line of electricity equivalence ice covering thickness monitoring method according to claim 9, which is characterized in that described
Tower insulator chain tiltangleθBnWith the adjacent tower insulator chain tiltangleθCnWith polarity, when insulator chain is rolled to monitoring shelves
It is negative when tiltedly, otherwise for just.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111879275A (en) * | 2020-07-31 | 2020-11-03 | 国网四川省电力公司电力科学研究院 | Online monitoring device and method for icing of power transmission line |
| CN112484779A (en) * | 2020-11-24 | 2021-03-12 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Inclination angle icing monitoring method under stress mode of power line tower |
| CN113686286A (en) * | 2021-07-23 | 2021-11-23 | 国电南瑞科技股份有限公司 | Method, device and system for monitoring icing of continuous shield lead of strain section of power transmission line |
| CN114354050A (en) * | 2021-12-07 | 2022-04-15 | 贵州电网有限责任公司 | Method for monitoring deicing process of power transmission line |
| CN114689005A (en) * | 2022-05-06 | 2022-07-01 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Icing monitoring method under uneven icing working condition |
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| CN111442752A (en) * | 2020-03-26 | 2020-07-24 | 广州长川科技有限公司 | Method for monitoring equivalent icing thickness of power transmission line |
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| CN113686286A (en) * | 2021-07-23 | 2021-11-23 | 国电南瑞科技股份有限公司 | Method, device and system for monitoring icing of continuous shield lead of strain section of power transmission line |
| CN114354050A (en) * | 2021-12-07 | 2022-04-15 | 贵州电网有限责任公司 | Method for monitoring deicing process of power transmission line |
| CN114354050B (en) * | 2021-12-07 | 2024-05-17 | 贵州电网有限责任公司 | Power transmission line deicing process monitoring method |
| CN114689005A (en) * | 2022-05-06 | 2022-07-01 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Icing monitoring method under uneven icing working condition |
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