CN104573192B - Online monitoring method for equivalent icing thickness of overhead line strain tower - Google Patents
Online monitoring method for equivalent icing thickness of overhead line strain tower Download PDFInfo
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Abstract
The invention discloses an online monitoring method for equivalent icing thickness of a strain tower of an overhead line. The method comprises the following steps: (1) extracting historical tension data of the on-line monitoring lead/ground wire, and acquiring historical tension of the lead/ground wire in an ice-free period; (2) acquiring historical load data of the lead/ground wires according to historical tension data of the lead/ground wires in an ice-free period to obtain a maximum load; (3) obtaining the maximum equivalent lead/ground wire length according to the maximum load and tower foundation information provided by a power grid company; (4) extracting real-time tension data of the on-line monitoring lead/ground wires, and calculating the equivalent icing thickness of the lead/ground wires; (5) and according to the real-time meteorological data, selecting the equivalent ice coating thickness to judge the ice coating amount of the overhead line. The method has the advantages of simple calculation, high accuracy and high reliability.
Description
Technical field
The present invention relates to the transmission line of electricity of power domain to monitor field, more particularly to a kind of overhead transmission line anchor support etc. on-line
It is worth the on-line monitoring method of ice covering thickness.
Background technology
As social economy increasingly develops, stabilization, safety and the reliable supply of electric power turn into the problem of becoming more and more important.And
Though icing is a kind of common natural phenomena, ice damage serious threat the safe operation of power network.In terms of power equipment, ice damage
Insulator rupture, gold utensil damage can be caused, shaft tower collapses, and wire fracture, directly results in the power failure of wiring region；In social production
Aspect, the bad weather of ice damage can cause traffic to be obstructed, communication disruption, and electric power first-aid is extremely difficult, and the power network of large area is paralysed
Paralysis causes industrial and agricultural production to stop production, and various service trades are stagnated, and directly results in the economic loss of heaviness, and people's lives can not normally be entered
OK.In order to ensure the safe operation of power network, it is necessary to be monitored to the icing situation of transmission line of electricity and judge whether to take accordingly
Measure is to avoid breaking, the generation of accident such as take.
Current power transmission line ice coating on-line monitoring almost all uses weight method.So-called weight method is to replace pulling force sensor
For the ball-eye of insulator, the inclination angle of suspension insulator, angle of wind deflection and comprehensive are measured respectively using angle and pulling force sensor
Load is closed, wind speed etc. is measured using microclimate sensor group (containing the sensors such as temperature, relative humidity, wind speed, wind direction, rainfall),
The equivalent ice cover of real-time wire can be calculated by substituting into equivalent ice covering thickness computation model again.According to existing patent, " one kind is aerial
The on-line monitoring method of equivalent line ice covering thickness ", incorporation engineering application is actual at present, it is proposed that applied to south electric network frame
The tangent tower icing equivalent thickness computation model of empty line ice coating on-line monitoring system.But it is currently based on the strain insulator of weight method
Tower wire icing THICKNESS CALCULATION is still studied less, applied to the less of ice covering monitoring system, leads to not cover tension tower conducting wire
Ice thickness is calculated, and grid company still can not accurately and effectively grasp anchor support line ice coating situation, and then and design specification
Compare carry out early warning.The anchor support ice covering thickness of existing transmission line of electricity calculates deficiency and is mainly manifested in：1st, theoretical calculation model relates to
And parameter and formula it is excessive, and need to collect data based on substantial amounts of icing data, limit this to a certain extent
The engineer applied of model；2nd, some models consider wind load, but the value can not be calculated accurately, and often wind speed senses during icing
Device freezes, and the data obtained is invalid；3rd, the ice thickness and the ice thickness difference of in-site measurement that some model theory models calculate are big, cause mould
Type result of calculation is inaccurate, and most models do not have the experience for being applied to actual icing on-line monitoring system, and it calculates accurate
True property is still to be tested.
The content of the invention
The shortcomings that it is an object of the invention to overcome prior art and deficiency, there is provided one kind calculates simple, accuracy and can
By the on-line monitoring method of the high overhead transmission line anchor support equivalence ice covering thickness of property.
The purpose of the present invention is achieved through the following technical solutions：A kind of overhead transmission line anchor support equivalence ice covering thickness it is online
Monitoring method, comprise the following steps：
(1) extract anchor support on-line monitoring and lead/ground wire history pulling force data and history meteorological data, according to history meteorology number
/ ground wire history pulling force is led according to the anchor support in icing period is rejected, the anchor support for obtaining no ice period leads/ground wire history pulling force
Data；
(2)/ground wire history pulling force data is led according to the anchor support without ice period, is led/ground wire history payload data；And
And the anchor support to obtaining leads/ground wire history payload data progress Frequence Analysis, obtains peak load；
(3) the pole and tower foundation parameter provided according to the peak load and grid company obtained in step (2), is calculated most
It is equivalent greatly to lead/ground line length；
(4) extract anchor support on-line monitoring and lead/real-time the pulling force data of ground wire, obtain anchor support and lead/ground wire real time load number
According to, peak load, maximum equivalent are led/ground line length and led/ground wire real time load data are updated to the equivalent icing of anchor support
In thickness model, calculate anchor support and lead/ground wire equivalence ice covering thickness；
(5) according to the real time meteorological data of on-line monitoring, the equivalent ice covering thickness that selects to calculate judges overhead transmission line
Ice cover.
Preferably ,/ground wire history load G is led in the step (2)0For：
G0=F；
Wherein F is to lead/ground wire history value of thrust.
Further, when insulator serial type be I string, then anchor support on-line monitoring lead/ground wire history value of thrust be lead/
Ground wire history value of thrust F；
When insulator serial type is that double I go here and there, and wherein a string are provided with pulling force sensor, then anchor support on-line monitoring leads/ground
Line history value of thrust is multiplied by 2 to lead/ground wire history value of thrust F；
When insulator serial type is that double I go here and there, and often string is mounted on pulling force sensor, then anchor support on-line monitoring leads/ground wire
History value of thrust is to lead/ground wire history value of thrust F.
Preferably, maximum equivalent leads/ground line length l in the step (3)mFor：
lm=Gm/(q0n)；
Wherein GmFor peak load acquired in step (2)；q0To lead/ground wire unit length deadweight, n is to lead/ground wire
Division number.
Preferably, led in the step (4)/ground wire real time load data G is：
G=F'；
Wherein F ' is to lead/real-time the pulling force of ground wire.
Further, anchor support equivalence ice covering thickness h in the step (4)mIt is calculated as follows：
1. as G≤GmWhen, hm=0；
2. as G >=GmWhen, actual wire length S is：
Unit length wire icing load w is：
Add following correction factor w1For：
Equivalent ice covering thickness hmFor：
Wherein GmFor peak load acquired in step (2)；D is to lead/the diameter of ground wire, lmFor what is obtained in step (3)
Maximum equivalent leads/ground line length, and ρ is standard iced insulator, and n is to lead/ground wire division number.
Further, when insulator serial type is I strings, then on-line monitoring lead/the real-time value of thrust of ground wire be lead/ground wire is real
When value of thrust F '；
When insulator serial type is that double I go here and there, and wherein a string are provided with pulling force sensor, then on-line monitoring lead/ground wire is real-time
Value of thrust is multiplied by 2 to lead/real-time value of thrust the F ' of ground wire；
When insulator serial type is that double I go here and there, and often string is mounted on pulling force sensor, then on-line monitoring lead/ground wire draws in real time
Force value is to lead/real-time value of thrust the F ' of ground wire.
Preferably, meteorological data includes temperature and relative humidity data in the step (1), by ring in the step (1)
Border temperature is less than 1 degree Celsius and period of the relative humidity more than 80% is judged as icing period.
Preferably, the method for peak load acquisition is in the step (2)：/ ground wire history payload data is led to acquisition
Frequency carry out normal distribution simulation, using the maximum that gets of normal distribution simulation as peak load, wherein the normal state
Maximum in distribution simulation is one of value of the probability 95% to 99.9%.
Preferably, step (3) the pole and tower foundation information include lead/ground wire unit length deadweight, lead/ground wire division number,
Lead/ground linear diameter and insulator serial type.
The present invention is had the following advantages relative to prior art and effect：
(1) the inventive method leads/ground wire history load by analyzing anchor support Historical Monitoring data using without ice period
Data Frequence Analysis goes out peak load, then show that maximum equivalent leads/ground line length according to peak load, finally by maximum lotus
Carry, maximum equivalent lead/ground line length and lead/ground wire real time load etc. is updated in equivalent ice covering thickness model and calculates equivalence
Ice covering thickness, equivalent ice covering thickness is selected according to current weather data to estimate the ice cover in overhead transmission line, the present invention from
Mechanics principle sets out, it is contemplated that leads/the delta data of ground wire history length, has the advantages of accuracy and high reliability, therefore
Effective foundation can be provided for the disposal decision-making of monitoring system；And also have and calculate strong excellent of simple and generalization
Point.
(2) the inventive method is in equivalent ice covering thickness calculating process, and required shaft tower information content is few, and grid company only needs
Wire/ground wire unit length deadweight, insulator serial type are provided, lead/ground wire division number and lead/ground linear diameter this several shaft tower
Back ground Information, because these information are easily searched from handbook and on drawing, avoid being difficult to accurately look into using grass-roots unit
The information such as the span that finds, design conductor length, required shaft tower information easy-to-search and are easily provided.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the on-line monitoring method of overhead transmission line anchor support equivalence ice covering thickness in embodiment.
Embodiment
With reference to embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are unlimited
In this.
Embodiment
Present embodiment discloses a kind of on-line monitoring method of overhead transmission line anchor support equivalence ice covering thickness, as shown in figure 1,
This method comprises the following steps that：
(1) extraction needs to monitor the on-line monitoring of power network 2011 and leads/ground wire history pulling force data and historical temperature and phase
To humidity data meteorological data, environment temperature is less than 1 degree Celsius and when period of the relative humidity more than 80% is judged as icing
Phase, and reject and lead/ground wire history pulling force data in icing period, obtain no ice period leads/ground wire history pulling force number
According to；
(2)/ground wire history payload data is led according to/ground wire history the pulling force of leading without ice period, acquisition；And to acquisition
/ ground wire history payload data progress Frequence Analysis is led, to obtain peak load Gm；
/ ground wire history load G is led in the present embodiment0For：
G0=F；
Wherein F is to lead/ground wire history value of thrust.In the present embodiment because insulator serial type is that double I go here and there, and often go here and there and pacify
Pulling force sensor is filled, therefore lead/ground wire history value of thrust F is equal to the on-line monitoring obtained in step (1) and leads/ground wire history pulling force
Value.
Peak load is obtained in the present embodiment in the following manner：By history payload data G obtained above0Carry out frequency
Analysis, and normal distribution simulation is carried out according to frequency, simulate to obtain maximum respectively as peak load by the normal distribution
Gm；
(3) the pole and tower foundation information provided according to the peak load and grid company that are obtained in step (2), is calculated most
It is equivalent greatly to lead/ground line length lm；
Wherein the present embodiment maximum equivalent leads/ground line length lmFor：
lm=Gm/(q0n)；
Wherein q0To lead/ground wire unit length deadweight, n is to lead/ground wire division number；
(4) on-line monitoring for extracting power network December 11 to December 21 in 2012 leads the/real-time pulling force data of ground wire, root
Calculated according to these data and lead/ground wire real time load data G, by peak load Gm, maximum equivalent lead/ground line length lmAnd lead/ground
Line real time comprehensive payload data G is updated in equivalent ice covering thickness model, is calculated and is led/ground wire equivalence ice covering thickness hm；
Wherein led in the present embodiment/ground wire real time load data G is：
G=F'；
Wherein F ' is to lead/real-time the value of thrust of ground wire.In the present embodiment because insulator serial type is that double I go here and there, and often go here and there and pacify
Pulling force sensor is filled, therefore lead/the real-time value of thrust F of ground wire leads the/real-time value of thrust of ground wire equal to on-line monitoring.
Equivalent ice covering thickness h is guarded in the present embodimentmIt is calculated as follows：
1. as G≤GmWhen, hm=0；
2. as G >=GmWhen, actual wire length S is：
Unit length wire icing load w is：
Add following correction factor w1For：
Equivalent ice covering thickness hmFor：
Wherein GmFor peak load acquired in step (2)；D is to lead/the diameter of ground wire, lmFor what is obtained in step (3)
Maximum equivalent leads/ground line length, and for n to lead/ground wire division number, ρ is standard iced insulator, ρ=900kg/m in the present embodiment3。
(5) according to the real time meteorological data of on-line monitoring, equivalent ice covering thickness h is selectedmTo judge the icing of overhead transmission line
Amount, so as to decide whether to take corresponding deicing measure.
The step of the present embodiment (2), can also be used as maximum by artificial observed frequency figure so as to roughly estimate maximum
Load Gm。
In the present embodiment, when the insulator serial type used is other serial type, such as：
When insulator serial type be I string, then on-line monitoring lead/ground wire history value of thrust be lead/ground wire history value of thrust F；
On-line monitoring lead/the real-time value of thrust of ground wire be lead/real-time value of thrust the F ' of ground wire；
When insulator serial type is that double I go here and there, and wherein a string are provided with pulling force sensor, then on-line monitoring leads/ground wire history
Value of thrust is multiplied by 2 to lead/ground wire history value of thrust F, on-line monitoring leads/the real-time value of thrust of ground wire be multiplied by 2 for lead/ground wire draws in real time
Force value F '.
Above-described embodiment is the preferable embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any Spirit Essences without departing from the present invention with made under principle change, modification, replacement, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (2)
1. a kind of on-line monitoring method of overhead transmission line anchor support equivalence ice covering thickness, it is characterised in that comprise the following steps：
(1) extraction on-line monitoring leads/ground wire history pulling force data and history meteorological data, is rejected and is according to history meteorological data
Icing period leads/ground wire history pulling force, and obtain no ice period leads/ground wire history pulling force data；The meteorological data includes
Temperature and relative humidity data, when environment temperature being less than into the period of 1 degree Celsius and relative humidity more than 80% being judged as icing
Phase；
(2)/ground wire history payload data is led according to/ground wire history the pulling force data of leading without ice period, acquisition；And to acquisition
/ ground wire history payload data progress Frequence Analysis is led, obtains peak load；Peak load obtain method be：To the leading of acquisition/
The frequency of ground wire history payload data carries out normal distribution simulation, and the maximum that normal distribution simulation is got is as most
Big load, wherein the maximum in normal distribution simulation is one of value of the probability 95% to 99.9%；
It is described to lead/ground wire history load G0For：
G0=F；When insulator serial type be I string, then on-line monitoring lead/ground wire history value of thrust be lead/ground wire history value of thrust F；
When insulator serial type is that double I go here and there, and wherein a string are provided with pulling force sensor, then on-line monitoring leads/ground wire history pulling force
Value is multiplied by 2 to lead/ground wire history value of thrust F；
When insulator serial type is that double I go here and there, and often string is mounted on pulling force sensor, then on-line monitoring leads/ground wire history value of thrust
As lead/ground wire history value of thrust F；
Wherein F is to lead/ground wire history value of thrust；When insulator serial type is I strings, on-line monitoring leads/and the real-time value of thrust of ground wire is
Lead/real-time value of thrust the F ' of ground wire；
When insulator serial type is that double I go here and there, and wherein a string are provided with pulling force sensor, then on-line monitoring leads the/real-time pulling force of ground wire
Value is multiplied by 2 to lead/real-time value of thrust the F ' of ground wire；
When insulator serial type is that double I go here and there, and often string is mounted on pulling force sensor, then on-line monitoring leads the/real-time value of thrust of ground wire
As lead the/real-time value of thrust F ' of ground wire；
(3) the pole and tower foundation information provided according to the peak load and grid company that are obtained in step (2), calculates maximum etc.
Effect leads/ground line length：
lm=Gm/(q0n)；
Wherein GmFor peak load acquired in step (2)；q0To lead/ground wire unit length deadweight, n is to lead/ground wire division
Number；
(4) extraction on-line monitoring leads the/real-time pulling force data of ground wire, is calculated according to these data and leads/ground wire real time load data, will
Peak load, maximum equivalent lead/ground line length and lead/ground wire real time load data are updated in equivalent ice covering thickness model,
Calculate and lead/ground wire equivalence ice covering thickness；Lead/ground wire real time load data G is：
G=F'；
Wherein F ' is to lead/real-time the pulling force of ground wire；Lead/ground wire equivalence ice covering thickness hmIt is calculated as follows：
1. as G≤GmWhen, hm=0；
2. as G >=GmWhen, actual wire length S is：
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Unit length wire icing load w is：
<mrow>
<mi>w</mi>
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Add following correction factor w1For：
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Wherein GmFor peak load acquired in step (2)；D is to lead/the diameter of ground wire, lmFor the maximum obtained in step (3)
Equivalent to lead/ground line length, for n to lead/ground wire division number, ρ is standard iced insulator；
(5) according to the real time meteorological data of on-line monitoring, equivalent ice covering thickness is selected to judge the ice cover of overhead transmission line.
2. the on-line monitoring method of overhead transmission line anchor support equivalence ice covering thickness according to claim 1, it is characterised in that
Step (3) the pole and tower foundation information includes leading/ground wire unit length deadweight, lead/ground wire division number, lead/ground linear diameter and
Insulator serial type.
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| CN201410789648.1A CN104573192B (en) | 2014-12-17 | 2014-12-17 | Online monitoring method for equivalent icing thickness of overhead line strain tower |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104913727B (en) * | 2015-04-30 | 2017-08-25 | 广西电网有限责任公司电力科学研究院 | A kind of method of distributed measurement OPGW ice covering thickness |
| CN110378066B (en) * | 2019-07-29 | 2023-06-09 | 贵州电网有限责任公司 | Method for calculating icing thickness of tension tower power transmission line |
| CN111442752B (en) * | 2020-03-26 | 2021-11-19 | 广州长川科技有限公司 | Method for monitoring equivalent icing thickness of power transmission line |
| CN113701689B (en) * | 2021-07-26 | 2024-01-16 | 贵州电网有限责任公司 | Method and system for measuring equivalent icing thickness of tension tower power transmission line |
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| CN104573192A (en) | 2015-04-29 |
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