CN106960095A - A kind of method and system for determining wire creep rate - Google Patents
A kind of method and system for determining wire creep rate Download PDFInfo
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Abstract
The invention discloses a kind of method for determining wire creep rate, methods described includes：Obtain the time cycle parameter of wire；The time cycle parameter is updated to database, to determine wire creep rate；The database is preset with the relation of wire creep rate and different time cycle；The database is set up in the following way：The line length increment of wire is determined using the sag increment of wire；The line length increment is entered to the standard conversion of trip temperature and tension force, standard line length increment is converted into；The standard line length increment in the wire different time cycle is obtained, the creep rate in the wire different time cycle is calculated；The creep rate in different conductor different time cycle is analyzed, wire creep rate and the relation in different time cycle is confirmed, sets up the database in the different time cycle and the wire creep rate；Based on the database, the wire creep rate in different time cycle is determined.
Description
Technical field
The present invention relates to converting electricity field, more particularly, to a kind of method and system for determining wire creep rate.
Background technology
With the high speed development of national economy, all trades and professions are increasing to the demand of electric power, and power supply department is provided
The quality (stability, continuity and adjoint service) of supply of electric power requires also more and more higher, therefore remote high voltage transmission line
The security of the operation of power networks on road is particularly important.Transmission line of electricity is the important component of power system, current China's electricity
Power phenomenon in short supply is serious, using heat-resisting wire, improves traditional capacity increasing technique such as sectional area of wire and has that the construction period is long, transmission of electricity is walked
The problems such as corridor requisition is difficult, cost is big.Existing many transmission lines of electricity are under heavy-duty service state, and high load capacity is transported
Row state is to propose strict test to the parameters of wire, particularly can become the temperature of wire in hot summer
Height, causes the sag of wire to increase so that wire is in unsafe running status.
China's overhead transmission line design discipline requires to compensate the creep elongation of lead wire and earth wire, but existing line using falling temperature method
The estimate and corresponding drop of elongation are only given in design discipline to the less transmission pressure line style in section that the past is commonly used
Temperature value is interval, and creep elongation amount and correspondence reduction temperature value not to large-section lead makes clear and definite regulation.At present,
The cooling value for having put into the large-section lead of engineer applied is based on wire creep data analysis and calculated, and lacks to heavy in section
The collection and analysis of conducting wire sag long-term observation data.Both at home and abroad for wire creep properties analysis still using quasi-static analysis as
It is main, for lead wire and earth wire from unwrapping wire, stringing, stringing to operation life cycle management whole process the rare report of systemic quantitative analysis
Road, and all based on analysis of experiments, lack accurate mathematical calculation model.
Prior art (CN:201610654029.0) it is tension stringing when one kind calculates Overhead Transmission Line Construction to disclose
During wire creep compliance method.But it is due to each not phase of wire gauge model used by each bar extra high voltage direct current transmission line
Together, the various structural parameters such as strain insulator segment length, span, the hanging point discrepancy in elevation and insulator hardware string also all vary, in order to fill
Divide effectively using large-section lead sag observation data, unified Data Analysis Platform need to be set up, to improve the profit of sag
With rate, it is capable of the creep rate of direct derivation different time wire.
Accordingly, it would be desirable to a kind of technology, to solve the typical creep rate for the wire long-term creep deformation observed based on sag
The problem of metering.
The content of the invention
The invention provides a kind of method and system for determining wire creep rate, to solve the wire observed based on sag
The problem of typical creep rate of long-term creep deformation is measured.
In order to solve the above problems, the invention provides a kind of method for determining wire creep rate, methods described includes：
Obtain the time cycle parameter of wire；
The time cycle parameter is updated to database, to determine wire creep rate；The database is preset with wire
Creep rate and the relation in different time cycle；The database is set up in the following way：
The line length increment of wire is determined using the sag increment of wire；
The line length increment is entered to the standard conversion of trip temperature and tension force, standard line length increment is converted into；
The standard line length increment in the wire different time cycle is obtained, the creep in the wire different time cycle is calculated
Rate；
The creep rate in different conductor different time cycle is analyzed, wire creep rate and different time cycle is confirmed
Relation, sets up the database in the different time cycle and the wire creep rate；
Based on the database, the wire creep rate in different time cycle is determined.
Preferably, the arc of the wire when sag increment of the wire is the sag and stringing of the wire when observing
The difference for value of hanging down.
Preferably, the line length incremental steps for determining wire include：The wire span is the discrepancy in elevation between l, two hitch points
Angle isThe wire two ends hitch point discrepancy in elevation is h, line length increment Delta L such as formula (1) caused by the conducting wire sag increment Delta f
It is expressed as：
Wherein, Δ f=fSurvey-fTightlyDuring for observation when the sag and stringing of the wire between the sag of the wire
Sag increment, unit is m；
For strain insulator hardware string from gravity than carrying, unit is N/ (mmm2)；
K is the coefficient of connection for considering strain insulator hardware string；
Δ L is that unit is m due to the line length increment for the wire that the creep of sag increment wire triggers；
fSurveySag when being observed for the different time cycle of the wire, unit is m；
fTightlyFor the wire different time cycle stringing when sag, unit is m；
For the wire two ends hitch point height difference angle；
L is the span of observation gear, and unit is m；
The discrepancy in elevation between h hitch points of wire two described in observation gear, unit is m；
λ is long for the string of strain insulator string, and unit is m；
G0It is strain insulator string from gravity, unit is N；
S is the cross-sectional area of the observation shelves wire, and unit is mm2；
The elastic modelling quantity of E wires described in observation gear；
F is wire construction sag, and unit is m；
G is that wire is carried from anharmonic ratio, and unit is N/mm2；
g0Carried for insulator chain from anharmonic ratio, unit is N/mm2。
Preferably, the coefficient of connection K of the strain insulator hardware string includes：
During connectionless strain insulator-string, K=1；
When one end connects strain insulator-string,
When two ends connect strain insulator-string,
Preferably, it is described that the standard that the line length increment of the wire enters trip temperature and tension force converts, such as formula
(2)：
Wherein, Δ LMarkFor the long increment of normal line, i.e. creep compliance under the standard conditions after excess temperature and tension force conversion；
α is the temperature linear expansion coefficient of the observation shelves wire；
Δ τ is ambient temperature differences when environment temperature is with stringing when sag is observed；
Δ σ is Tension Difference when wire running tension is with stringing when sag is observed；
The elastic modelling quantity of E wires described in observation gear.
Based on another aspect of the present invention, the present invention provides a kind of system for determining wire creep rate, and the system includes：
Acquiring unit, the time cycle parameter for obtaining wire；
Analytic unit, for the time cycle parameter to be updated into database, to determine wire creep rate；The data
Storehouse is preset with the relation of wire creep rate and different time cycle；The database is set up in the following way：Utilize wire
Sag increment determines the line length increment of wire；The line length increment is entered to the standard conversion of trip temperature and tension force, standard is converted into
Line length increment；The standard line length increment in the wire different time cycle is obtained, the compacted of the wire different time cycle is calculated
Variability；The creep rate in different conductor different time cycle is analyzed, wire creep rate and the pass in different time cycle is confirmed
System, sets up the database in the different time cycle and the wire creep rate；
Based on the database, the wire creep rate in different time cycle can determine.
Preferably, the arc of the wire when sag increment of the wire is the sag and stringing of the wire when observing
The difference for value of hanging down.
Preferably, the system also includes setting up unit, and wire creep rate and different time cycle are preset with for setting up
Relation the database, it is described set up unit be additionally operable to determine wire line length increment include：The wire span is l,
Height difference angle is between two hitch pointsThe wire two ends hitch point discrepancy in elevation is h, and line length caused by the conducting wire sag increment Delta f increases
Amount Δ L such as formula (1) are expressed as：
Wherein, Δ f=fSurvey-fTightlyDuring for observation when the sag and stringing of the wire between the sag of the wire
Sag increment, unit is m；
For strain insulator hardware string from gravity than carrying, unit is N/ (mmm2)；
K is the coefficient of connection for considering strain insulator hardware string；
Δ L is that unit is m due to the line length increment for the wire that the creep of sag increment wire triggers；
fSurveySag when being observed for the different time cycle of the wire, unit is m；
fTightlyFor the wire different time cycle stringing when sag, unit is m；
For the wire two ends hitch point height difference angle；
L is the span of observation gear, and unit is m；
The discrepancy in elevation between h hitch points of wire two described in observation gear, unit is m；
λ is long for the string of strain insulator string, and unit is m；
G0It is strain insulator string from gravity, unit is N；
S is the cross-sectional area of the observation shelves wire, and unit is mm2；
The elastic modelling quantity of E wires described in observation gear；
F is wire construction sag, and unit is m；
G is that wire is carried from anharmonic ratio, and unit is N/mm2；
g0Carried for insulator chain from anharmonic ratio, unit is N/mm2。
Preferably, the coefficient of connection K of the strain insulator hardware string includes：
During connectionless strain insulator-string, K=1；
When one end connects strain insulator-string,
When two ends connect strain insulator-string,
Preferably, it is described to set up the standard that unit is additionally operable to enter the line length increment of the wire trip temperature and tension force
Conversion, such as formula (2)：
Wherein, Δ LMarkFor the long increment of normal line, i.e. creep compliance under the standard conditions after excess temperature and tension force conversion；
α is the temperature linear expansion coefficient of the observation shelves wire；
Δ τ is ambient temperature differences when environment temperature is with stringing when sag is observed；
Δ σ is Tension Difference when wire running tension is with stringing when sag is observed；
The elastic modelling quantity of E wires described in observation gear.
The technical scheme is that conducting wire sag value is carried out into united analysis, first with the sag increment of wire
The line length increment of wire is converted into, while the temperature and tension factor of wire creep rate will be influenceed to carry out standard handovers, mark is obtained
The long increment of directrix, i.e. creep compliance.By calculating the creep rate obtained in the different conductor different time cycle, creep rate is by creep
Original line length during with wire stringing is measured to be divided by.The present invention sets up the creep rate in the different time cycle of different conductor unified standard
Data Analysis Platform, determines creep rate and the relation of time cycle.The present invention can utilize the creep rate and time cycle determined
Relation, derive different time cycle wire creep rate.
Brief description of the drawings
By reference to the following drawings, the illustrative embodiments of the present invention can be more fully understood by：
Fig. 1 is a kind of method flow diagram of determination wire creep rate according to an embodiment of the present invention；And
Fig. 2 is a kind of system construction drawing of determination wire creep rate according to an embodiment of the present invention.
Embodiment
The illustrative embodiments of the present invention are introduced with reference now to accompanying drawing, however, the present invention can use many different shapes
Formula is implemented, and it is to disclose at large and fully there is provided these embodiments to be not limited to embodiment described herein
The present invention, and fully pass on the scope of the present invention to person of ordinary skill in the field.For showing for being illustrated in the accompanying drawings
Term in example property embodiment is not limitation of the invention.In the accompanying drawings, identical cells/elements are attached using identical
Icon is remembered.
Unless otherwise indicated, term (including scientific and technical terminology) used herein has to person of ordinary skill in the field
It is common to understand implication.Further it will be understood that the term limited with usually used dictionary, is appreciated that and it
The linguistic context of association area has consistent implication, and is not construed as Utopian or excessively formal meaning.
Fig. 1 is a kind of method flow diagram of determination wire creep rate according to an embodiment of the present invention.The reality of the present invention
Mode is applied according to line length increment and the variation relation of sag, using the thinking of backstepping, by based on different conductor line parameter circuit value
Sag observation data are converted into standard line length increment, and are further measured using creep rate, and most various wire lines are not at last
The sag observed result of same parameter value is reflected as the creep rate of unified measurement unit.In order to which conducting wire sag value is carried out into unified point
Analysis, first with wire sag translating incremental be wire line length increment, while by influence wire creep rate temperature and
Tension factor carries out standard handovers, obtains standard line length increment, i.e. creep compliance.Different conductor different time week is obtained by calculating
Creep rate in phase, original line length when creep rate is by creep compliance with wire stringing is divided by.The present invention sets up different conductor and existed
The creep rate Data Analysis Platform in different time cycle under conditions of unified standard, to determine the pass of creep rate and time cycle
System.The present invention derives the creep rate of different time cycle wire using the creep rate and the relation of time cycle determined.Such as Fig. 1
Shown, method 100 is since step 101：
Preferably, in step 101, the time cycle parameter of wire is obtained.
Preferably, in step 102, time cycle parameter is updated to database, to determine wire creep rate；Database is pre-
Relation provided with wire creep rate Yu different time cycle；Database is set up in the following way：
The line length increment of wire is determined using the sag increment of wire；
Line length increment is entered to the standard conversion of trip temperature and tension force, standard line length increment is converted into；
The standard line length increment in wire different time cycle is obtained, the creep rate in wire different time cycle is calculated；
The creep rate in different conductor different time cycle is analyzed, wire creep rate and different time cycle is confirmed
Relation, sets up the database in different time cycle and wire creep rate.
Preferably, the difference of the sag of wire when the sag increment of wire is the sag and stringing of wire when observing.
In embodiment of the present invention, determining the calculation procedure of the line length increment of wire includes：Wire span is l, two suspensions
Height difference angle is between pointThe wire two ends hitch point discrepancy in elevation is h, line length increment Delta L such as formula caused by conducting wire sag increment Delta f
(1) it is expressed as：
Wherein, Δ f=fSurvey-fTightlySag during for observation when the sag and stringing of wire between the sag of wire increases
Amount, unit is m；
For strain insulator hardware string from gravity than carrying, unit is N/ (mmm2)；
K is the coefficient of connection for considering strain insulator hardware string；
During connectionless strain insulator-string, K=1；
When one end connects strain insulator-string,
When two ends connect strain insulator-string,
Δ L is that unit is m due to the line length increment for the wire that the creep of sag increment wire triggers；
fSurveySag when being observed for the different time cycle of wire, unit is m；
fTightlyFor wire different time cycle stringing when sag, unit is m；
For wire two ends hitch point height difference angle；
L is the span of observation gear, and unit is m；
H is the discrepancy in elevation between the hitch point of observation gear wire two, and unit is m；
λ is long for the string of strain insulator string, and unit is m；
G0It is strain insulator string from gravity, unit is N；
S is the cross-sectional area of observation shelves wire, and unit is mm2；
E is the elastic modelling quantity of observation gear wire；
F is wire construction sag, and unit is m；
G is that wire is carried from anharmonic ratio, and unit is N/mm2；
g0Carried for insulator chain from anharmonic ratio, unit is N/mm2。
Preferably, in step 102, the standard that the line length increment of wire enters trip temperature and tension force is converted, standard is converted into
Line length increment.
In embodiments of the present invention, the standard that the line length increment of wire enters trip temperature and tension force is converted, such as formula
(2)：
Wherein, Δ LMarkFor the long increment of normal line, i.e. creep compliance under the standard conditions after excess temperature and tension force conversion；
α is the temperature linear expansion coefficient of observation shelves wire；
Δ τ is ambient temperature differences when environment temperature is with stringing when sag is observed；
Δ σ is Tension Difference when wire running tension is with stringing when sag is observed；
E is the elastic modelling quantity of observation gear wire.
Database is preferably based on, the wire creep rate in different time cycle is can determine.
According to the embodiment of the present invention, choose and breathe out Zheng, small stream Zhejiang, the heavy in section of clever three extra high voltage direct current transmission lines that continue
Conducting wire sag observes data.
Table 1 breathes out Zheng's line large-section lead sag observation data
Table 1
The small stream Zhejiang line large-section lead sag observation data of table 2
Table 2
The spirit of table 3 continue line large-section lead sag observation data
Table 3
Original line length during by the observation gear large-section lead creep compliance by conversion with stringing is divided by, you can seen
The creep rate of gear large-section lead is surveyed, table 4 below show what three UHVDC Transmission Lines were observed by long-term sag
Heavy in section creep rate change：
The wire creep rate that table 4 is obtained by the long-term sag observation conversion of large-section lead changes (%)
Table 4
The sag under different line parameter circuit values can be observed the unified data of data progress by being converted by data above
Platform Analysis, can draw from analysis result, creep compliance about phase of each bar circuit large-section lead in stringing interior release in one week
When in the half of burst size in stringing latter year.This based on creep test with analyzing the creep compliance computation model that draws more also one
Cause, by unified observation data processing method, effectively can see each bar line-sag value based on different circuit gear parameters
Survey result, which is placed under same coordinate system, to be analyzed, and effectively improves data user rate., can be with by embodiments of the present invention
Derive the creep rate of different time cycle wire.
Embodiment of the present invention is not easy to com-parison and analysis to solve different circuit large-section lead sag observation data
Problem, the sensitive relations changed using line length increment and sag increment, using recurrence formula, establish known sag observation number
Change and then draw the rule of line length creep rate according to reverse line length increment.Embodiment of the present invention passes through unified analyzing and processing side
Method, each bar line-sag value observed result based on different line parameter circuit values is converted under same coordinate system and analyzed, is effectively carried
The high utilization rate of data.
Fig. 2 is a kind of system construction drawing of determination wire creep rate according to an embodiment of the present invention.As shown in Fig. 2
A kind of system 200 for determining wire creep rate includes：
Acquiring unit 201, the time cycle parameter for obtaining wire.
Analytic unit 202, for time cycle parameter to be updated into database, to determine wire creep rate；Database is pre-
Relation provided with wire creep rate Yu different time cycle；Database is set up in the following way：Utilize the sag increment of wire
Determine the line length increment of wire；Line length increment is entered to the standard conversion of trip temperature and tension force, standard line length increment is converted into；Obtain
The standard line length increment in wire different time cycle, calculates the creep rate in wire different time cycle；During by different conductor difference
Between the creep rate in cycle analyzed, confirm wire creep rate and the relation in different time cycle, set up the different time cycle with
The database of wire creep rate.
Based on database, the wire creep rate in different time cycle can determine.
Preferably, the difference of the sag of wire when the sag increment of wire is the sag and stringing of wire when observing.
Preferably, the system also includes setting up unit, and wire creep rate and different time cycle are preset with for setting up
Relation the database, set up unit be additionally operable to determine wire line length increment include：Wire span is l, two hitch points
Between height difference angle beThe wire two ends hitch point discrepancy in elevation is h, such as formula (1) of line length increment Delta L caused by conducting wire sag increment Delta f
It is expressed as：
Wherein, Δ f=fSurvey-fTightlySag during for observation when the sag and stringing of wire between the sag of wire increases
Amount, unit is m；
For strain insulator hardware string from gravity than carrying, unit is N/ (mmm2)；
K is the coefficient of connection for considering strain insulator hardware string；
Δ L is that unit is m due to the line length increment for the wire that the creep of sag increment wire triggers；
fSurveySag when being observed for the different time cycle of wire, unit is m；
fTightlyFor wire different time cycle stringing when sag, unit is m；
For wire two ends hitch point height difference angle；
L is the span of observation gear, and unit is m；
H is the discrepancy in elevation between the hitch point of observation gear wire two, and unit is m；
λ is long for the string of strain insulator string, and unit is m；
G0It is strain insulator string from gravity, unit is N；
S is the cross-sectional area of observation shelves wire, and unit is mm2；
E is the elastic modelling quantity of observation gear wire；
F is wire construction sag, and unit is m；
G is that wire is carried from anharmonic ratio, and unit is N/mm2；
g0Carried for insulator chain from anharmonic ratio, unit is N/mm2。
Preferably, the coefficient of connection K of strain insulator hardware string includes：
During connectionless strain insulator-string, K=1；
When one end connects strain insulator-string,
When two ends connect strain insulator-string,
Preferably, the standard conversion that unit is additionally operable to enter the line length increment of wire trip temperature and tension force, such as formula are set up
(2)：
Wherein, Δ LMarkFor the long increment of normal line, i.e. creep compliance under the standard conditions after excess temperature and tension force conversion；
α is the temperature linear expansion coefficient of observation shelves wire；
Δ τ is ambient temperature differences when environment temperature is with stringing when sag is observed；
Δ σ is Tension Difference when wire running tension is with stringing when sag is observed；
E is the elastic modelling quantity of observation gear wire.
A kind of system 200 of determination wire creep rate of embodiment of the present invention and one kind of another embodiment of the invention
Determine that the method 100 of wire creep rate is corresponding, no longer repeated herein.
The present invention is described by reference to a small amount of embodiment.However, it is known in those skilled in the art, as
What subsidiary Patent right requirement was limited, except the present invention other embodiments disclosed above equally fall the present invention's
In the range of.
Normally, all terms used in the claims are all solved according to them in the usual implication of technical field
Release, unless clearly defined in addition wherein.All references " one/described/be somebody's turn to do [device, component etc.] " are all opened ground
At least one example in described device, component etc. is construed to, unless otherwise expressly specified.Any method disclosed herein
Step need not all be run with disclosed accurate order, unless explicitly stated otherwise.
Claims (10)
1. a kind of method for determining wire creep rate, methods described includes：
Obtain the time cycle parameter of wire；
The time cycle parameter is updated to database, to determine wire creep rate；The database is preset with wire creep
Rate and the relation in different time cycle；The database is set up in the following way：
The line length increment of wire is determined using the sag increment of wire；
The line length increment is entered to the standard conversion of trip temperature and tension force, standard line length increment is converted into；
The standard line length increment in the wire different time cycle is obtained, the creep rate in the wire different time cycle is calculated；
The creep rate in different conductor different time cycle is analyzed, wire creep rate and the pass in different time cycle is confirmed
System, sets up the database in the different time cycle and the wire creep rate.
When 2. according to the method described in claim 1, the sag increment of the wire is observation the sag of the wire with it is tight
The difference of the sag of wire during line.
3. according to the method described in claim 1, the line length incremental steps for determining wire include：The wire span is l,
Height difference angle is between two hitch pointsThe wire two ends hitch point discrepancy in elevation is h, line length caused by the conducting wire sag increment Delta f
Increment Delta L such as formula (1) are expressed as：
Wherein, Δ f=fSurvey-fTightlySag during for observation when the sag and stringing of the wire between the sag of the wire
Increment, unit is m；
For strain insulator hardware string from gravity than carrying, unit is N/ (mmm2)；
K is the coefficient of connection for considering strain insulator hardware string；
Δ L is that unit is m due to the line length increment for the wire that the creep of sag increment wire triggers；
fSurveySag when being observed for the different time cycle of the wire, unit is m；
fTightlyFor the wire different time cycle stringing when sag, unit is m；
For the wire two ends hitch point height difference angle；
L is the span of observation gear, and unit is m；
The discrepancy in elevation between h hitch points of wire two described in observation gear, unit is m；
λ is long for the string of strain insulator string, and unit is m；
G0It is strain insulator string from gravity, unit is N；
S is the cross-sectional area of the observation shelves wire, and unit is mm2；
The elastic modelling quantity of E wires described in observation gear；
F is wire construction sag, and unit is m；
G is that wire is carried from anharmonic ratio, and unit is N/mm2；
g0Carried for insulator chain from anharmonic ratio, unit is N/mm2。
4. method according to claim 3, the coefficient of connection K of the strain insulator hardware string includes：
During connectionless strain insulator-string, K=1；
When one end connects strain insulator-string,
When two ends connect strain insulator-string,
5. method according to claim 3, the mark that the line length increment of the wire is entered to trip temperature and tension force
Quasi- conversion, such as formula (2)：
Wherein, Δ LMarkFor the long increment of normal line, i.e. creep compliance under the standard conditions after excess temperature and tension force conversion；
α is the temperature linear expansion coefficient of the observation shelves wire；
Δ τ is ambient temperature differences when environment temperature is with stringing when sag is observed；
Δ σ is Tension Difference when wire running tension is with stringing when sag is observed；
The elastic modelling quantity of E wires described in observation gear.
6. a kind of system for determining wire creep rate, the system includes：
Acquiring unit, the time cycle parameter for obtaining wire；
Analytic unit, for the time cycle parameter to be updated into database, to determine wire creep rate；The database is pre-
Relation provided with wire creep rate Yu different time cycle；The database is set up in the following way：Utilize the sag of wire
Increment determines the line length increment of wire；The line length increment is entered to the standard conversion of trip temperature and tension force, standard line length is converted into
Increment；The standard line length increment in the wire different time cycle is obtained, the creep rate in the wire different time cycle is calculated；
The creep rate in different conductor different time cycle is analyzed, wire creep rate and the relation in different time cycle is confirmed, builds
Stand the different time cycle and the database of the wire creep rate.
7. system according to claim 6, when the sag increment of the wire is observation the sag of the wire with it is tight
The difference of the sag of wire during line.
8. system according to claim 6, the system also includes setting up unit, wire creep rate is preset with for setting up
With the database of the relation in different time cycle, the unit of setting up is additionally operable to determine that the line length increment of wire includes：Institute
Wire span is stated for l, height difference angle is between two hitch pointsThe wire two ends hitch point discrepancy in elevation is h, the conducting wire sag increment
Such as formula (1) of line length increment Delta L caused by Δ f are expressed as：
Wherein, Δ f=fSurvey-fTightlySag during for observation when the sag and stringing of the wire between the sag of the wire
Increment, unit is m；
For strain insulator hardware string from gravity than carrying, unit is N/ (mmm2)；
K is the coefficient of connection for considering strain insulator hardware string；
Δ L is that unit is m due to the line length increment for the wire that the creep of sag increment wire triggers；
fSurveySag when being observed for the different time cycle of the wire, unit is m；
fTightlyFor the wire different time cycle stringing when sag, unit is m；
For the wire two ends hitch point height difference angle；
L is the span of observation gear, and unit is m；
The discrepancy in elevation between h hitch points of wire two described in observation gear, unit is m；
λ is long for the string of strain insulator string, and unit is m；
G0It is strain insulator string from gravity, unit is N；
S is the cross-sectional area of the observation shelves wire, and unit is mm2；
The elastic modelling quantity of E wires described in observation gear；
F is wire construction sag, and unit is m；
G is that wire is carried from anharmonic ratio, and unit is N/mm2；
g0Carried for insulator chain from anharmonic ratio, unit is N/mm2。
9. system according to claim 8, the coefficient of connection K of the strain insulator hardware string includes：
During connectionless strain insulator-string, K=1；
When one end connects strain insulator-string,
When two ends connect strain insulator-string,
10. system according to claim 8, the unit of setting up is additionally operable to the line length increment progress of the wire
Temperature and the conversion of the standard of tension force, such as formula (2)：
Wherein, Δ LMarkFor the long increment of normal line, i.e. creep compliance under the standard conditions after excess temperature and tension force conversion；
α is the temperature linear expansion coefficient of the observation shelves wire；
Δ τ is ambient temperature differences when environment temperature is with stringing when sag is observed；
Δ σ is Tension Difference when wire running tension is with stringing when sag is observed；
The elastic modelling quantity of E wires described in observation gear.
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| CN110224335A (en) * | 2019-05-28 | 2019-09-10 | 中国电力科学研究院有限公司 | A kind of aerial condutor erection method and system considering creep compliance |
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