CN104242452A - Dynamic capacity increasing monitoring system and method for power transmission line - Google Patents

Abstract

The invention discloses a dynamic capacity increasing monitoring system and method for a power transmission line. The method comprises the steps of carrying out real-time monitoring on the power transmission line, acquiring monitoring data to calculate the safe operation current capacity of the power transmission line, judging whether capacity increasing can be carried out on the power transmission line according to the safe operation current capacity, and if yes, extracting preset capacity increasing information to carry out capacity increasing on the power transmission line; in the process of capacity increasing of the power transmission line, calculating the conductor sag data of the power transmission line according to the monitoring data, and sending the monitoring data and the conductor sag data to an application terminal to display the data. Data acquisition and data monitoring can be carried out on the power transmission line in real time, real-time monitoring is carried out on the conductor sag data of the power transmission line in the process of capacity increasing, the influence on safe operation of the power transmission line from various key factors is comprehensively considered, and therefore the safety is improved.

Description

Power transmission line dynamic capacity increase monitoring system and increase-volume monitoring method thereof

Technical field

The present invention relates to electric power network technical field, particularly relate to a kind of power transmission line dynamic capacity increase monitoring system and increase-volume monitoring method thereof.

Background technology

Power transmission line dynamic capacity increase system is the important component part of link of transmitting electricity in power grid construction, is the important technical promoting the intelligent normal operation of electrical network.The core content of power transmission line dynamic capacity increase system is for line security requirement, the circuit of danger installs suitable condition monitoring device, utilize wire dynamic compatibilization model, for important Real-Time Monitoring parameter when dispatching of power netwoks provides circuit to carry load and necessary technical support, the appearance simultaneously fully excavating circuit carries potentiality.

Traditional power transmission line dynamic capacity increase monitoring system is all carry out dynamic compatibilization by detecting conductor temperature and environment weather information and carrying out analyzing to transmission line, in capacity increasing process, the axial tensile force of conductor temperature and wire tension-resistant section is monitored, if exceed threshold value, give the alarm.Owing to just considering that in capacity increasing process conductor temperature and wire tension-resistant section axial tensile force are on the impact of transmission line, being difficult to the safe operation guaranteeing transmission line, there is the low shortcoming of fail safe in traditional power transmission line dynamic capacity increase monitoring system.

Summary of the invention

Based on this, be necessary for the problems referred to above, the power transmission line dynamic capacity increase monitoring system providing a kind of fail safe high and increase-volume monitoring method thereof.

A kind of power transmission line dynamic capacity increase monitoring system, comprises increase-volume data collection station, dynamic compatibilization server and is connected the application terminal of described dynamic compatibilization server,

Described increase-volume data collection station is used for carrying out Real-Time Monitoring to transmission line, obtains Monitoring Data and is sent to described dynamic compatibilization server; Described Monitoring Data comprises wire data message and environmental data information;

Described dynamic compatibilization server is used for the safe operation ampacity calculating described transmission line according to described Monitoring Data, and judges that described transmission line whether can increase-volume according to described safe operation ampacity; If so, then extract default increase-volume information and increase-volume is carried out to described transmission line; And when carrying out increase-volume to described transmission line, calculate the conducting wire sag data of described transmission line according to described Monitoring Data; And described Monitoring Data and conducting wire sag data are sent to the display of described application terminal.

An increase-volume monitoring method for power transmission line dynamic capacity increase monitoring system, comprises the following steps:

Increase-volume data collection station carries out Real-Time Monitoring to transmission line, obtains Monitoring Data and is sent to dynamic compatibilization server; Described Monitoring Data comprises wire data message and environmental data information;

Described dynamic compatibilization server calculates the safe operation ampacity of described transmission line according to described Monitoring Data;

According to described safe operation ampacity, described dynamic compatibilization server judges that described transmission line whether can increase-volume;

If so, then extract default increase-volume information and increase-volume is carried out to described transmission line;

Described dynamic compatibilization server, when carrying out increase-volume to described transmission line, calculates the conducting wire sag data of described transmission line according to described Monitoring Data;

Described Monitoring Data and conducting wire sag data are sent to application terminal display by described dynamic compatibilization server.

Above-mentioned power transmission line dynamic capacity increase monitoring system and increase-volume monitoring method thereof, Real-Time Monitoring is carried out to transmission line, obtain the safe operation ampacity that Monitoring Data carrys out computing electric power line, and judge that transmission line whether can increase-volume according to safe operation ampacity, if so, then extract default increase-volume information and increase-volume is carried out to transmission line.When carrying out increase-volume to transmission line, calculate the conducting wire sag data of transmission line according to Monitoring Data, and Monitoring Data and conducting wire sag data are sent to application terminal display.Due to data acquisition and data monitoring can be carried out to transmission line in real time, and when carrying out increase-volume, Real-Time Monitoring is carried out to the conducting wire sag data of transmission line, consider the impact of multiple key factor on transmission line safe operation, compared with traditional power transmission line dynamic capacity increase monitoring system, improve fail safe.

Accompanying drawing explanation

Fig. 1 is the structure chart of power transmission line dynamic capacity increase monitoring system in an embodiment;

Fig. 2 is the structure chart of power transmission line dynamic capacity increase monitoring system in another embodiment;

Fig. 3 is the flow chart of the increase-volume monitoring method of power transmission line dynamic capacity increase monitoring system in an embodiment;

Fig. 4 is the flow chart of the increase-volume monitoring method of power transmission line dynamic capacity increase monitoring system in another embodiment.

Embodiment

For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.Set forth a lot of detail in the following description so that fully understand the present invention.But the present invention can be much different from alternate manner described here to implement, those skilled in the art can when without prejudice to doing similar improvement when intension of the present invention, therefore the present invention is by the restriction of following public specific embodiment.

Unless otherwise defined, all technology used herein and scientific terminology are identical with belonging to the implication that those skilled in the art of the present invention understand usually.The object of term used in the description of the invention herein just in order to describe specific embodiment, is not intended to be restriction the present invention.

A kind of power transmission line dynamic capacity increase monitoring system, as shown in Figure 1, comprise increase-volume data collection station 110, dynamic compatibilization server 120 and application terminal 130, application terminal 130 connects dynamic compatibilization server 120.

Increase-volume data collection station 110, for carrying out Real-Time Monitoring to transmission line, obtains Monitoring Data and is sent to dynamic compatibilization server 120.

Monitoring Data comprises wire data message and environmental data information, is used as dynamic compatibilization server 120 and carries out increase-volume analysis and provide data.The concrete data type of wire data message and environmental data information can adjust according to the actual requirements.Wire data message can comprise conductor temperature data, wire tension data and diameter of wire etc.Wherein in an embodiment, wire data message comprises conductor temperature data and wire tension data, and increase-volume data collection station 110 comprises temperature-detecting device and tension detecting apparatus.

The conductor temperature Data Concurrent that temperature-detecting device is used for Real-time Obtaining transmission line delivers to dynamic compatibilization server 120; The wire tension Data Concurrent that tension detecting apparatus is used for Real-time Obtaining transmission line delivers to dynamic compatibilization server 120.

In addition, wire data message also can comprise tower bar inclination data and video data, and the same dynamic compatibilization server 120 that is used as carries out increase-volume analysis.Increase-volume data collection station 110 can comprise dip measuring device and camera head, dip measuring device user measures the tower bar inclination data of transmission line in real time and is sent to dynamic compatibilization server 120, and camera head is used for carrying out shooting to transmission line in real time and obtains video data and be sent to dynamic compatibilization server 120.

Environmental data information specifically can comprise ambient temperature, wind direction, wind speed, intensity of sunshine etc., and increase-volume data collection station 110 can directly obtain environmental data information from local weather bureau and be sent to dynamic compatibilization server 120.

Increase-volume data collection station 110 and dynamic compatibilization server 120 can be connected by cable network, also can be connected by wireless network.Wherein in an embodiment, as shown in Figure 2, power transmission line dynamic capacity increase monitoring system also comprises the GPRS communication server 140, increase-volume data collection station 110 carries out data communication by GPRS (General Packet Radio Service, the general packet radio service technology) communication server 140 and dynamic compatibilization server 120.Particularly, increase-volume data collection station 110 sends Monitoring Data to the GPRS communication server 140 with GPRS mode or MESH (wireless mesh network) mode.The data unification that the GPRS communication server 140 pairs of increase-volume data collection stations 110 send is sent to dynamic compatibilization server 120 after resolving.

Further, power transmission line dynamic capacity increase monitoring system also can comprise Network Physical Separator, the GPRS communication server 140 is sent to dynamic compatibilization server 120 by resolving the data obtained by Network Physical Separator, Network Physical Separator realizes the one-way transmission of resolution data, namely the data that the GPRS communication server 140 is resolved can be sent to dynamic compatibilization server 120 through Network Physical Separator, but any information on dynamic compatibilization server 120 can not be sent on the GPRS communication server 140, so fully ensure the fail safe of dynamic compatibilization server 140, prevent information leakage.

According to Monitoring Data and safe operation ampacity, dynamic compatibilization server 120 for the safe operation ampacity according to Monitoring Data computing electric power line, and judges whether transmission line can increase-volume.If so, then extract default increase-volume information and increase-volume is carried out to transmission line; And when carrying out increase-volume to transmission line, calculate the conducting wire sag data of transmission line according to Monitoring Data; And Monitoring Data and conducting wire sag data are sent to application terminal 130 show, Real-Time Monitoring is carried out to the Monitoring Data of transmission line and conducting wire sag data.

The general principle of dynamic compatibilization is obtained by the heat balance derivation of the heating of wire and heat radiation, and heat balance equation is:

W _j+W _s＝W _r+W _f

Wherein, W _jfor the heating power that unit length conductor resistance produces, W _sfor the Endothermic power at sunshine of unit length wire, W _rfor the heat loss through radiation power of unit length wire, W _ffor the heat loss through convection power of unit length wire.

Each factor considered in computational process is different, makes the coefficient of its formula different.Specifically can adopt Morgan equation safe operation ampacity, be applicable to when Reynolds number is 100 ~ 3000, namely ambient temperature is 40 DEG C, wind speed 0.5m/s, conductor temperature be when being no more than 120 DEG C, can be used for the calculating of diameter 4.2 ~ 100mm current carrying capacity of conductor.Morgan equation is as follows:

$\mathrm{It}={\left\{\frac{{9.92\mathrm{\θ}\left(\mathrm{VD}\right)}^{0.485}+\mathrm{\π\ϵSD}[{(\mathrm{\θ}+t_a+273)}^4-{(t_a+273)}^4]-{\mathrm{\α}}_s{I}_{s}D}{k_t{R}_{\mathrm{dt}}}\right\}}^{0.5}$

Wherein, θ is the current-carrying temperature rise (DEG C) of wire, and V is wind speed (m/s), D be wire diameter (mm), ε is the radiation coefficient of conductive line surfaces, and the new line ε of light is 0.23 ~ 0.46, and the old line ε that turns black is 0.90 ~ 0.95; S is Si Difen-Bao Erciman constant, and concrete value is 5.67 × 10 ^-8(W/m ²); t _afor ambient temperature (DEG C), α _sfor wire heat absorption coefficient, the new line α of light _sbe 0.23 ~ 0.46, turn black old line α _sbe 0.90 ~ 0.95; k _tfor temperature is t=θ+t _adEG C time wire alternating current-direct current resistance ratio, R _dtfor wire D.C. resistance when temperature is t DEG C, I _sfor daylight is to the intensity of sunshine (W/m of wire ²).

The maximum operating temperature of transmission line is mainly by wire and the gold utensil general designation of widely used iron or aluminum metal-ware (in the transmission line) distortion at high temperature and tired restriction, in DL/T5092 " 110-500kV makes somebody a mere figurehead transporting design code ", the allowable temperature of regulation steel reinforced aluminium conductor is 70 DEG C, generally consider harsher meteorological condition when checking wire maximum delivery capacity according to conductor allowable temperature, in the present embodiment, harsh weather environment value is: ambient temperature 35 DEG C, wind speed 0.5m/s, solar radiation power density 0.1W/cm ².Because current in wire, sunshine, wind speed and ambient temperature are all time dependent functions, so the conductor temperature of transmission line is also change with current in wire and environmental condition and the function of time changed at any time.

Dynamic compatibilization server 120 specifically can have multiple account form according to the safe operation ampacity of Monitoring Data computing electric power line, and the Monitoring Data needed for different account form is different.Wherein in an embodiment, dynamic compatibilization server 120 specifically comprises according to the processing procedure of the safe operation ampacity of Monitoring Data computing electric power line:

Obtain the operational mode of transmission line.Operational mode comprises steady state mode of operation and transient state operational mode, can directly obtain its operational mode according to the original control system of transmission line.

If transmission line is in steady state mode of operation, then basis computationally secure runs ampacity.Temperature rise when wire data message comprises wire current-carrying, wire diameter, conductive line surfaces radiation coefficient, wire heat absorption coefficient, alternating current-direct current resistance ratio and D.C. resistance, environmental data information comprises wind speed, intensity of sunshine and ambient temperature.

Wherein, A=π ε SD [(θ+t _a+ 273) ⁴-(t _a+ 273) ⁴], temperature rise when θ is wire current-carrying, V is wind speed, and D is wire diameter, and ε is conductive line surfaces radiation coefficient, I _sfor intensity of sunshine, S is constant, t _afor ambient temperature, α _sfor wire heat absorption coefficient, K _tfor conductor temperature is θ+t _atime alternating current-direct current resistance ratio, R _dtfor conductor temperature is θ+t _atime D.C. resistance.

According to conductor temperature in the standard of IEEE Std.738-2006 and the summary of carrying current calculation method, with the equation of heat balance of wire for according to carrying out the calculating of conductor temperature and ampacity.Steady-state heat balance equation is:

q _c+q _r＝q _s+I ²R(T _c)

Then

$I=\sqrt{\frac{q_c+q_r-q_s}{R\left(T_c\right)}}$

Wherein, q _cfor wire convection heat losses, q _rfor wire radiation thermal loss, q _sfor solar heat increment, I is safe operation ampacity, T _cfor conductor temperature, R (T _c) for conductor temperature be T _ctime resistance.

Wire convection heat losses q _cspecifically can comprise forced convection thermal loss and free convection thermal loss two kinds.Forced convection thermal loss specific formula for calculation is

$q_{c1}=[1.01+0.0372{\left(\frac{{\mathrm{D\ρ}}_f{V}_w}{{\mathrm{\μ}}_f}\right)}^{0.52}]K_f{K}_{\mathrm{angle}}(T_c-T_a)$

$q_{c2}=0.0119{\left(\frac{{\mathrm{D\ρ}}_f{V}_w}{{\mathrm{\μ}}_f}\right)}^{0.6}{K}_f{K}_{\mathrm{angle}}(T_c-T_a)$

Q _c1for forced convection thermal loss during low wind speed, q _c2for forced convection thermal loss during high wind speed, the division of wind speed height can according to circumstances adjust.D is diameter of wire, V _wair flow velocity residing for wire, ρ _ffor atmospheric density, μ _ffor air dynamic viscosity, K _ffor temperature is T _filmtime air pyroconductivity, T _film=(T _a+ T _c)/2, K _anglefor wind direction coefficient, T _afor wire ambient air temperature, T _cfor conductor temperature.

Free convection thermal loss is when wind speed is zero, and free convection thermal loss still exists, and free convection thermal loss specific formula for calculation is

$q_{\mathrm{cn}}={0.0205\mathrm{\ρ}}_f^{0.5}{D}^{0.75}{(T_c-T_a)}^{1.25}$

Q _cnfor free convection thermal loss, ρ _ffor atmospheric density, D is diameter of wire, T _afor wire ambient air temperature, T _cfor conductor temperature.

When calculating the safe operation ampacity of transmission line during low wind speed in the present embodiment, wire convection heat losses adopts the greater in forced convection thermal loss and free convection thermal loss, guarantees to calculate accuracy.

Wire radiation thermal loss q _rspecific formula for calculation is

$q_r=0.0178\mathrm{D\ϵ}[{\left(\frac{T_c+273}{100}\right)}^4-{\left(\frac{T_a+273}{100}\right)}^4]$

Wherein, D is diameter of wire, and ε is wire emissivity, T _afor wire ambient air temperature, T _cfor conductor temperature.

Solar heat increment q _sspecific formula for calculation is

q _s＝αQ _sesin(θ)A′

Wherein, the projected area that A ' is conductor, α is the sun absorption coefficient of wire, Q _sefor the global radiation heat of the sun and air after conductor height correction, θ is effective incidence angle of sunlight.Solar radiation heat can be determined according to the longitude and latitude etc. of circuit geographic location, and does not need actual measured value.

As follows after simplification being carried out to above-mentioned Morgan equation according to steady-state heat balance equation:

$I=\sqrt{\frac{{9.92\mathrm{\θ}\left(\mathrm{VD}\right)}^{0.485}+A-{\mathrm{\α}}_s{I}_{s}D}{K_t{R}_{\mathrm{dt}}}}$

A＝πεSD[(θ+t _a+273) ⁴-(t _a+273) ⁴]

Temperature rise (DEG C) when θ is wire current-carrying, V is wind speed (m/s), D is wire diameter (m), and ε is conductive line surfaces radiation coefficient, and the new line ε of light is 0.23-0.46, and the old line ε that turns black is 0.90-0.95; I _sfor intensity of sunshine (w/m ²), S is constant, is 5.67 × 10 in the present embodiment ^-8(w/m ²); t _afor ambient temperature, α _sfor wire heat absorption coefficient, the new line α of light _sbe 0.23-0.46, turn black old line α _sbe 0.90-0.95; K _tfor conductor temperature is θ+t _atime alternating current-direct current resistance ratio, R _dtfor conductor temperature is θ+t _atime D.C. resistance.

So far safe operation ampacity when transmission line is in steady state mode of operation is just calculated.

If transmission line is in transient state operational mode, then basis or computationally secure runs ampacity.Wire data message comprises wire rated current, wire applies the electric current before short-term load (duty), wire preload factor, wire short-term load (duty) running time, wire thermal time constant, wire thermal capacitance, wire external thermal resistance, wire volumetric heat capacity coefficient, the volume of conductor, wire intermittent duty cycle and load call completing rate.

When transient state is run, equation of heat balance is:

$q_c+q_r+{\mathrm{mC}}_p\frac{{\mathrm{dT}}_c}{\mathrm{dt}}=q_s+I^{2}R\left(T_c\right)$

Can obtain

$\frac{{\mathrm{dT}}_c}{\mathrm{dt}}=\frac{1}{{\mathrm{mC}}_p}[q_s+I^{2}R\left(T_c\right)-q_c-q_r]$

Wherein, I is current in wire (A), T _cfor conductor temperature (DEG C), R (T _c) be the AC resistance (Ω/km) of the every km of wire during temperature Shu, q _cfor wire convection heat losses (W/m), q _rfor wire radiation thermal loss (W/m), q _sfor the solar heat increment (W/m) of wire, mC _pfor the overall heat storage capacity (J/m DEG C) of wire.

The factor affecting wire transient state operation carrying current calculation resembles except condition except this body structure of wire is gentle, also needs mode and the load duration of considering applying load.Apply the mode of load and comprise short-term load (duty) and periodically intermittent duty two kinds, according to the difference of mode applying load, safe operation ampacity when utilizing following formulae discovery transmission line to be in transient state operational mode.

$I_t=I_n\×{\left(\frac{1-x^2{e}^{-t/\mathrm{\τ}}}{1-e^{-t/\mathrm{\τ}}}\right)}^{1/2}$

$I_P=I_n\×{\left[\frac{(1-x^2)(1-e^{-p/\mathrm{\τ}})}{1-e^{\mathrm{-\αp}/\mathrm{\τ}}}\right]}^{1/2}$

x＝I ₀/I _n

τ＝Q _c×T ₄

Q _c＝c×v

$T_4=\frac{t_c-t_0}{P_C+P_r-P_S}$

Wherein, I _tfor safe operation ampacity during short-term load (duty), I _nfor wire rated current, I ₀for wire applies the electric current before short-term load (duty), x is wire preload factor, and t is wire short-term load (duty) running time, and τ is wire thermal time constant, Q _cfor wire thermal capacitance, T ₄for wire external thermal resistance; C is wire volumetric heat capacity coefficient, and v is the volume of conductor, and p is the wire intermittent duty cycle, and α P is the load current currency, and α is load call completing rate.I _pfor safe operation ampacity during periodicity intermittent duty, t _cfor conductor temperature, t ₀for ambient temperature, P _cfor wire convection heat losses power, P _rfor wire radiation thermal loss power, P _sfor the solar heat delta power of wire.

So far safe operation ampacity when transmission line is in transient state operational mode is just calculated.

The operational mode be according to transmission line in the present embodiment adopts corresponding mode computationally secure to run ampacity, more meet the real work situation of transmission line, improve the accuracy in computation of safe operation ampacity, also improve the applicability of power transmission line dynamic capacity increase monitoring system simultaneously.

Wherein in an embodiment, Monitoring Data comprises the heat transfer coefficient of wire, ambient temperature and conductor resistance.Dynamic compatibilization server 120 is specially according to the safe operation ampacity of Monitoring Data computing electric power line, according to $I^{\′}=\sqrt{\frac{h_{70}\left(t\right)(70-T_a)+Q_r-Q_s}{R_{70}}}$ Computationally secure runs ampacity.

Set up conductor temperature model

I ²R(T _C)+Q _S＝h(t)(T _C-T _a)+Q _r

Wherein, h (t) is heat transfer coefficient, represents the combined influence of ambient temperature and wind speed, wind direction, calculates by conductor temperature, current in wire, and current in wire can obtain from the original supervisory control system of transmission line.Wire radiation heat loss due to radiation Q _rwith solar heat increment Q _scomputational methods and above-mentioned steady state mode of operation time computationally secure run in ampacity method similar.Can be obtained by conductor temperature model

$h\left(t\right)=\frac{I^{2}R\left(T_C\right)+Q_S-Q_r}{T_C-T_a}$

Then

$I^{\′}=\sqrt{\frac{h_{70}\left(t\right)(70-T_a)+Q_r-Q_s}{R_{70}}}$

Wherein, I ' is safe operation ampacity, h ₇₀t () is heat transfer coefficient when conductor temperature is 70 degrees Celsius; T _afor ambient temperature, Q _rfor wire radiation heat loss due to radiation, Q _sfor solar heat increment, R ₇₀for resistance when conductor temperature is 70 degrees Celsius.

Temperature when running according to wire and Current calculation heat transfer coefficient h (t), be then approximately thermal capacity when h70 (t) tries to achieve wire maximum permissible temperature 70 DEG C by h (t), i.e. safe operation ampacity.Running ampacity by introducing heat transfer coefficient computationally secure, eliminating the error brought because of the inaccurate of measuring wind speed, improving the accuracy of data processing.

Known by analyzing, in conductor temperature model, heat transfer coefficient gets approximation affects very little on the calculating of wire capacity in low wind conditions, can by selecting conductor temperature scope (if conductor temperature is higher than ambient temperature more than 8 DEG C) by control errors in very little scope, the accuracy of raising data processing further.

It is not unique for being appreciated that dynamic compatibilization server 120 runs ampacity according to conductor temperature model computationally secure.In another embodiment, dynamic compatibilization server 120 is specially, according to I=f (V, v, T according to the safe operation ampacity of Monitoring Data computing electric power line _a, α, β) computationally secure run ampacity.

As follows by the safe operation ampacity of aforementioned steady-state heat balance equation and the known transmission line of Transient Thermal equilibrium equation:

I＝f(Q _C、Q _r、Q _S、R(T _c))

Due to wire heat loss through convection loss Q _c, wire radiation thermal loss Q _rwith the solar heat increment Q of wire _swind speed V, wind direction v, ambient temperature T _a, intensity of sunshine α and wire self character β function, so can be derived as further

I＝f(V、v、T _a、α、β)

Safe operation ampacity can be calculated equally.

According to safe operation ampacity, dynamic compatibilization server 120 judges that transmission line whether can increase-volume, specifically by obtaining the current in wire of transmission line, and judge whether current in wire is less than safe operation ampacity to determine whether can increase-volume.Current in wire directly can carry out pre-stored by original control system Real-time Obtaining of transmission line equally, if the current in wire of transmission line is less than safe operation ampacity, then illustrates and can carry out increase-volume to transmission line.

Staff can pre-set corresponding increase-volume information according to different increase-volume types, increase-volume type can divide according to the current in wire of the transmission line obtained, as the current value in same setting range is defined as a kind of increase-volume type, also can divide according to other wire data.Increase-volume information can comprise increase-volume amount of capacity and auxiliary dispatching scheme.Dynamic compatibilization server 120 is judging that transmission line can after increase-volume, extract increase-volume information and increase-volume is carried out to transmission line, can be specifically select corresponding increase-volume information to carry out increase-volume according to current current in wire, also can be that the selection instruction receiving user's input by application terminal 130 selects corresponding increase-volume information to carry out increase-volume.In addition, when dynamic compatibilization server 120 pairs of transmission lines carry out increase-volume, also can with GIS (Geographic Information System, GIS-Geographic Information System) interlock, comprehensive transmission line more in detail comprehensively geography information carries out increase-volume, improves increase-volume fail safe further.

Dynamic compatibilization server 120 when carrying out increase-volume to transmission line, according to the conducting wire sag data of Monitoring Data computing electric power line.

Wherein in an embodiment, wire data message comprises span, the ratio of overhead wire carries, the weight of unit length wire, conductive wire cross-section sum overhead wire minimum point stress.The concrete account form of conducting wire sag data is as follows:

f＝(L ₁ ²g)/(8σ)

g＝W/S

Wherein, f represents conducting wire sag data, L ₁for span (m), g is that the ratio of overhead wire carries (N/mmm ²), W is unit length wire weight (N/m), and S is sectional area of wire (mm ²), σ is overhead wire minimum point stress (N/mm ²), be specially horizontal stress.Be appreciated that the kind calculating the mode of conducting wire sag data and the Monitoring Data of employing is not unique.

Transmission line is being implemented in the process of increase-volume, wire distance to the ground is the key factor affecting circuit safe operation, conducting wire sag in dynamic compatibilization server 120 pairs of transmission line monitored areas carries out real-time analysis calculating, analyze the conducting wire sag variation tendency in capacity increasing process, improve the fail safe that transmission line runs.Application terminal 130 specifically can show Monitoring Data and conducting wire sag data to graphically, is convenient to staff and checks.

Dynamic compatibilization server 120 also can control application terminal 130 and export the warning message preset when conducting wire sag data exceed default sag threshold value, notify that staff processes in time, improves transmission line fail safe.

Above-mentioned power transmission line dynamic capacity increase monitoring system, when dynamic compatibilization server 120 pairs of transmission lines carry out increase-volume, calculate the conducting wire sag data of transmission line according to Monitoring Data, and Monitoring Data and conducting wire sag data are sent to application terminal 130 show.Due to data acquisition and data monitoring can be carried out to transmission line in real time, and when carrying out increase-volume, Real-Time Monitoring being carried out to the conducting wire sag data of transmission line, considering the impact of multiple key factor on transmission line safe operation, improve fail safe.

Wherein in an embodiment, application terminal 130 also for receiving the increase-volume information of dynamic compatibilization server 120 transmission and showing, and receives increase-volume operation information and is sent to dynamic compatibilization server 120.Dynamic compatibilization server 120 judge transmission line can increase-volume time, according to increase-volume information and increase-volume operation information, increase-volume is carried out to transmission line.

Application terminal 130 specifically by browser display increase-volume information so that user logins access.Send increase-volume operation information after user also can login application terminal 130 and be sent to dynamic compatibilization server 120, increasing the increase-volume scheme to transmission line, improve the applicability to transmission line increase-volume.

Wherein in an embodiment, dynamic compatibilization server 120 is also for when carrying out increase-volume to transmission line, according to safe operation time and the safe operation limit of Monitoring Data computing electric power line, and be sent to application terminal 130 display monitor in real time, to guarantee the safe operation of circuit increase-volume, further increase transmission line increase-volume fail safe.

Safe operation limit calculates specifically by arranging conductor temperature limit (as 70 DEG C or 80 DEG C) and safety time, calculate: after appearance " N-1 " situation, there is deterioration (wind speed reduces to 0) in meteorological condition, in the safety time arranged, conductor temperature can not exceed the safe current limit of conductor temperature limit (70 DEG C or 80 DEG C).

Safe operation Time Calculation is specifically by arranging conductor temperature limit (as 70 DEG C or 80 DEG C) and running current limit, calculate: after appearance " N-1 " situation, there is deterioration (wind speed reduces to 0) in meteorological condition, under running current limit, conductor temperature can not exceed the safety time of conductor temperature limit (70 DEG C or 80 DEG C).

In addition, dynamic compatibilization server 120 is when carrying out increase-volume to transmission line, also can control increase-volume data collection station 110 and monitor transmission line over the ground and scissors crossing air gap distance, affect line-to-ground and hand over across margin of safety, and the data monitored are sent to application terminal 130 show, improve transmission line safety in operation further.

Wherein in an embodiment, continue with reference to Fig. 2, power transmission line dynamic capacity increase monitoring system also can comprise the data storage server 150 connecting dynamic compatibilization server 120.Monitoring Data and safe operation ampacity, when judging that transmission line can not carry out increase-volume, are sent to data storage server 150 and store by dynamic compatibilization server 120, for the work such as the research of later transmission line or rectification provide data basis.

Wherein in an embodiment, power transmission line dynamic capacity increase monitoring system also can comprise the office terminal 160 connecting dynamic compatibilization server 120.Office terminal 160, for carrying out system maintenance to the authorization user information allowing to login stored in application terminal 130, also can provide functions such as the control and managements of power transmission line dynamic capacity increase monitoring system.

Present invention also offers a kind of increase-volume monitoring method of power transmission line dynamic capacity increase monitoring system, realize based on increase-volume data collection station, dynamic compatibilization server and application terminal, application terminal connects dynamic compatibilization server.As shown in Figure 3, said method comprising the steps of:

Step S110: increase-volume data collection station carries out Real-Time Monitoring to transmission line, obtains Monitoring Data and is sent to dynamic compatibilization server.

Monitoring Data comprises wire data message and environmental data information, is used as dynamic compatibilization server and carries out increase-volume analysis and provide data.The concrete data type of wire data message and environmental data information can adjust according to the actual requirements.Wire data message can comprise conductor temperature data, wire tension data and diameter of wire etc.Wherein in an embodiment, wire data message comprises conductor temperature data and wire tension data, and conductor temperature data and the wire tension Data Concurrent of increase-volume data collection station Real-time Obtaining transmission line deliver to dynamic compatibilization server.

In addition, wire data message also can comprise tower bar inclination data and video data, and the same dynamic compatibilization server 120 that is used as carries out increase-volume analysis.Increase-volume data collection station measures the tower bar inclination data of transmission line in real time, and carrying out shooting to transmission line obtains video data in real time, and tower bar inclination data and video data are sent to dynamic compatibilization server.

Environmental data information specifically can comprise ambient temperature, wind direction, wind speed, intensity of sunshine etc., and increase-volume data collection station can directly obtain environmental data information from local weather bureau and be sent to dynamic compatibilization server.

Increase-volume data collection station and dynamic compatibilization server can be connected by cable network, also can be connected by wireless network.Wherein in an embodiment, increase-volume data collection station carries out data communication by GPRS (General Packet Radio Service, the general packet radio service technology) communication server and dynamic compatibilization server.Particularly, increase-volume data collection station sends Monitoring Data to the GPRS communication server with GPRS mode or MESH (wireless mesh network) mode.The GPRS communication server is sent to dynamic compatibilization server after resolving the data unification that increase-volume data collection station sends.

Further, the GPRS communication server is sent to dynamic compatibilization server by resolving the data obtained by Network Physical Separator, Network Physical Separator realizes the one-way transmission of resolution data, namely the data that the GPRS communication server is resolved can be sent to dynamic compatibilization server through Network Physical Separator, but any information on dynamic compatibilization server can not be sent on the GPRS communication server, so fully ensure the fail safe of dynamic compatibilization server, prevent information leakage.

Step S120: dynamic compatibilization server is according to the safe operation ampacity of Monitoring Data computing electric power line.

The general principle of dynamic compatibilization is obtained by the heat balance derivation of the heating of wire and heat radiation, and heat balance equation is:

W _j+W _s＝W _r+W _f

Wherein, W _jfor the heating power that unit length conductor resistance produces, W _sfor the Endothermic power at sunshine of unit length wire, W _rfor the heat loss through radiation power of unit length wire, W _ffor the heat loss through convection power of unit length wire.

Each factor considered in computational process is different, makes the coefficient of its formula different.Can adopt Morgan equation safe operation ampacity, Morgan equation is as follows:

$\mathrm{It}={\left\{\frac{{9.92\mathrm{\θ}\left(\mathrm{VD}\right)}^{0.485}+\mathrm{\π\ϵSD}[{(\mathrm{\θ}+t_a+273)}^4-{(t_a+273)}^4]-{\mathrm{\α}}_s{I}_{s}D}{k_t{R}_{\mathrm{dt}}}\right\}}^{0.5}$

Wherein, θ is the current-carrying temperature rise (DEG C) of wire, and V is wind speed (m/s), D be wire diameter (mm), ε is the radiation coefficient of conductive line surfaces, and the new line ε of light is 0.23 ~ 0.46, and the old line ε that turns black is 0.90 ~ 0.95; S is Si Difen-Bao Erciman constant, and concrete value is 5.67 × 10 ^-8(W/m ²); t _afor ambient temperature (DEG C), α _sfor wire heat absorption coefficient, the new line α of light _sbe 0.23 ~ 0.46, turn black old line α _sbe 0.90 ~ 0.95; k _tfor temperature is t=θ+t _adEG C time wire alternating current-direct current resistance ratio, R _dtfor wire D.C. resistance when temperature is t DEG C, I _sfor daylight is to the intensity of sunshine (W/m of wire ²).

Dynamic compatibilization server specifically can have multiple account form according to the safe operation ampacity of Monitoring Data computing electric power line, and the Monitoring Data needed for different account form is different.Wherein in an embodiment, step S120 specifically comprises step 21 to step 23.

Step 21: the operational mode obtaining transmission line.Operational mode comprises steady state mode of operation and transient state operational mode, can directly obtain its operational mode according to the original control system of transmission line.

Step 22: if transmission line is in steady state mode of operation, then basis computationally secure runs ampacity.Temperature rise when wire data message comprises wire current-carrying, wire diameter, conductive line surfaces radiation coefficient, wire heat absorption coefficient, alternating current-direct current resistance ratio and D.C. resistance, environmental data information comprises wind speed, intensity of sunshine and ambient temperature.

$I=\sqrt{\frac{{9.92\mathrm{\θ}\left(\mathrm{VD}\right)}^{0.485}+A-{\mathrm{\α}}_s{I}_{s}D}{K_t{R}_{\mathrm{dt}}}}$

A＝πεSD[(θ+t _a+273) ⁴-(t _a+273) ⁴]

Wherein, temperature rise (DEG C) when θ is wire current-carrying, V is wind speed (m/s), D is wire diameter (m), and ε is conductive line surfaces radiation coefficient, and the new line ε of light is 0.23-0.46, and the old line ε that turns black is 0.90-0.95; I _sfor intensity of sunshine (w/m ²), S is constant, is 5.67 × 10 in the present embodiment ^-8(w/m ²); t _afor ambient temperature, α _sfor wire heat absorption coefficient, the new line α of light _sbe 0.23-0.46, turn black old line α _sbe 0.90-0.95; K _tfor conductor temperature is θ+t _atime alternating current-direct current resistance ratio, R _dtfor conductor temperature is θ+t _atime D.C. resistance.

Concrete computational process has been carried out detailed explanation and has been illustrated in above-mentioned power transmission line dynamic capacity increase monitoring system, does not repeat at this.So far safe operation ampacity when transmission line is in steady state mode of operation is just calculated.

Step 23: if transmission line is in transient state operational mode, then basis or $I_P=I_n\×{\left[\frac{(1-x^2)(1-e^{-p/\mathrm{\τ}})}{1-e^{\mathrm{-\αp}/\mathrm{\τ}}}\right]}^{1/2}$ Computationally secure runs ampacity.

Wire data message comprises wire rated current, wire applies the electric current before short-term load (duty), wire preload factor, wire short-term load (duty) running time, wire thermal time constant, wire thermal capacitance, wire external thermal resistance, wire volumetric heat capacity coefficient, the volume of conductor, wire intermittent duty cycle and load call completing rate.

$I_t=I_n\×{\left(\frac{1-x^2{e}^{-t/\mathrm{\τ}}}{1-e^{-t/\mathrm{\τ}}}\right)}^{1/2}$

$I_P=I_n\×{\left[\frac{(1-x^2)(1-e^{-p/\mathrm{\τ}})}{1-e^{\mathrm{-\αp}/\mathrm{\τ}}}\right]}^{1/2}$

x＝I ₀/I _n

τ＝Q _c×T ₄

Q _c＝c×v

$T_4=\frac{t_c-t_0}{P_C+P_r-P_S}$

Wherein, I _tfor safe operation ampacity during short-term load (duty), I _nfor wire rated current, I ₀for wire applies the electric current before short-term load (duty), x is wire preload factor, and t is wire short-term load (duty) running time, and τ is wire thermal time constant, Q _cfor wire thermal capacitance, T ₄for wire external thermal resistance; C is wire volumetric heat capacity coefficient, and v is the volume of conductor, and p is the wire intermittent duty cycle, and α P is the load current currency, and α is load call completing rate.I _pfor safe operation ampacity during periodicity intermittent duty, t _cfor conductor temperature, t ₀for ambient temperature, P _cfor wire convection heat losses power, P _rfor wire radiation thermal loss power, P _sfor the solar heat delta power of wire.

Concrete computational process has been carried out detailed explanation and has been illustrated in above-mentioned power transmission line dynamic capacity increase monitoring system, does not repeat at this.So far safe operation ampacity when transmission line is in transient state operational mode is just calculated.

The operational mode be according to transmission line in the present embodiment adopts corresponding mode computationally secure to run ampacity, more meet the real work situation of transmission line, improve the accuracy in computation of safe operation ampacity, also improve the applicability of power transmission line dynamic capacity increase monitoring system simultaneously.

Wherein in an embodiment, Monitoring Data comprises the heat transfer coefficient of wire, ambient temperature and conductor resistance.Step S120 comprises the following steps:

According to $I^{\′}=\sqrt{\frac{h_{70}\left(t\right)(70-T_a)+Q_r-Q_s}{R_{70}}}$ Computationally secure runs ampacity.

Wherein, I ' is safe operation ampacity, h ₇₀t () is heat transfer coefficient when conductor temperature is 70 degrees Celsius; T _afor ambient temperature, Q _rfor wire radiation heat loss due to radiation, Q _sfor solar heat increment, R ₇₀for resistance when conductor temperature is 70 degrees Celsius.

Concrete computational process has been carried out detailed explanation and has been illustrated in above-mentioned power transmission line dynamic capacity increase monitoring system, does not repeat at this.Temperature when running according to wire and Current calculation heat transfer coefficient h (t), be then approximately thermal capacity when h70 (t) tries to achieve wire maximum permissible temperature 70 DEG C by h (t), i.e. safe operation ampacity.Running ampacity by introducing heat transfer coefficient computationally secure, eliminating the error brought because of the inaccurate of measuring wind speed, improving the accuracy of data processing.

Known by analyzing, in conductor temperature model, heat transfer coefficient gets approximation affects very little on the calculating of wire capacity in low wind conditions, can by selecting conductor temperature scope (if conductor temperature is higher than ambient temperature more than 8 DEG C) by control errors in very little scope, the accuracy of raising data processing further.

It is not unique for being appreciated that dynamic compatibilization server 120 runs ampacity according to conductor temperature model computationally secure.In another embodiment, step S120 is specially, according to I=f (V, v, T _a, α, β) computationally secure run ampacity.

As follows by the safe operation ampacity of aforementioned steady-state heat balance equation and the known transmission line of Transient Thermal equilibrium equation:

I＝f(Q _C、Q _r、Q _S、R(T _c))

Due to wire heat loss through convection loss Q _c, wire radiation thermal loss Q _rwith the solar heat increment Q of wire _swind speed V, wind direction v, ambient temperature T _a, intensity of sunshine α and wire self character β function, so can be derived as further

I＝f(V、v、T _a、α、β)

Safe operation ampacity can be calculated equally.

Step S130: according to safe operation ampacity, dynamic compatibilization server judges whether transmission line can increase-volume.

Judge that transmission line whether can increase-volume, if so, then carry out step S150.Specifically by obtaining the current in wire of transmission line, and judge whether current in wire is less than safe operation ampacity to determine whether can increase-volume.Current in wire directly can carry out pre-stored by original control system Real-time Obtaining of transmission line equally, if the current in wire of transmission line is less than safe operation ampacity, then illustrates and can carry out increase-volume to transmission line.

Step S150: extract the increase-volume information preset and increase-volume is carried out to transmission line.

Staff can pre-set corresponding increase-volume information according to different increase-volume types, increase-volume type can divide according to the current in wire of the transmission line obtained, as the current value in same setting range is defined as a kind of increase-volume type, also can divide according to other wire data.Increase-volume information can comprise increase-volume amount of capacity and auxiliary dispatching scheme.Dynamic compatibilization server is judging that transmission line can after increase-volume, extract increase-volume information and increase-volume is carried out to transmission line, can be specifically select corresponding increase-volume information to carry out increase-volume according to current current in wire, also can be select corresponding increase-volume information to carry out increase-volume by the selection instruction of application terminal reception user input.In addition, when dynamic compatibilization server carries out increase-volume to transmission line, also can with GIS interlock, comprehensive transmission line more in detail comprehensively geography information carries out increase-volume, improves increase-volume fail safe further.

Step S160: dynamic compatibilization server, when carrying out increase-volume to transmission line, calculates the conducting wire sag data of transmission line according to Monitoring Data.

Wherein in an embodiment, wire data message comprises span, the ratio of overhead wire carries, the weight of unit length wire, conductive wire cross-section sum overhead wire minimum point stress.The concrete account form of conducting wire sag data is as follows:

f＝(L ₁ ²g)/(8σ)

g＝W/S

Wherein, f represents conducting wire sag data, L ₁for span (m), g is that the ratio of overhead wire carries (N/mmm ²), W is unit length wire weight (N/m), and S is sectional area of wire (mm ²), σ is overhead wire minimum point stress (N/mm ²), be specially horizontal stress.Be appreciated that the kind calculating the mode of conducting wire sag data and the Monitoring Data of employing is not unique.

Step S170: Monitoring Data and conducting wire sag data are sent to application terminal display by dynamic compatibilization server.

Transmission line is being implemented in the process of increase-volume, wire distance to the ground is the key factor affecting circuit safe operation, dynamic compatibilization server carries out real-time analysis calculating to the conducting wire sag in transmission line monitored area, analyze the conducting wire sag variation tendency in capacity increasing process, improve the fail safe that transmission line runs.Application terminal specifically can show Monitoring Data and conducting wire sag data to graphically, is convenient to staff and checks.

Dynamic compatibilization server also can control application terminal and export the warning message preset when conducting wire sag data exceed default sag threshold value, notify that staff processes in time, improves transmission line fail safe.

The increase-volume monitoring method of above-mentioned power transmission line dynamic capacity increase monitoring system, when dynamic compatibilization server carries out increase-volume to transmission line, calculate the conducting wire sag data of transmission line according to Monitoring Data, and Monitoring Data and conducting wire sag data are sent to application terminal display.Due to data acquisition and data monitoring can be carried out to transmission line in real time, and when carrying out increase-volume, Real-Time Monitoring being carried out to the conducting wire sag data of transmission line, considering the impact of multiple key factor on transmission line safe operation, improve fail safe.

Wherein in an embodiment, before step S150, the increase-volume monitoring method of power transmission line dynamic capacity increase monitoring system also comprises application terminal and receives increase-volume information that dynamic compatibilization server sends and show, and receives increase-volume operation information and be sent to the step of dynamic compatibilization server.In step S150, dynamic compatibilization server carries out increase-volume according to increase-volume information and increase-volume operation information to transmission line.

Application terminal specifically by browser display increase-volume information so that user logins access.User sends increase-volume operation information after also can logining application terminal and is sent to dynamic compatibilization server, increases the increase-volume scheme to transmission line, improves the applicability to transmission line increase-volume.

In addition, dynamic compatibilization server is when carrying out increase-volume to transmission line, also can comprise dynamic compatibilization server controls increase-volume data collection station monitoring transmission line over the ground and scissors crossing air gap distance, affect line-to-ground and hand over across margin of safety, and the data monitored are sent to the step of application terminal display, can further improve transmission line safety in operation.

Wherein in an embodiment, as shown in Figure 4, when dynamic compatibilization server according to safe operation ampacity judge transmission line can not increase-volume time, the increase-volume monitoring method of power transmission line dynamic capacity increase monitoring system also can comprise step S140.

Step S140: Monitoring Data and safe operation ampacity are sent to data storage server and store by dynamic compatibilization server.

Monitoring Data and safe operation ampacity are sent to data storage server store, for the work such as the research of later transmission line or rectification provide data basis.

Wherein in an embodiment, continue with reference to Fig. 4, when dynamic compatibilization server according to safe operation ampacity judge transmission line can increase-volume time, the increase-volume monitoring method of power transmission line dynamic capacity increase monitoring system also can comprise the following steps:

Step S180: dynamic compatibilization server according to the safe operation time of Monitoring Data computing electric power line and safe operation limit, and is sent to application terminal display.

Dynamic compatibilization server is when carrying out increase-volume to transmission line, according to safe operation time and the safe operation limit of Monitoring Data computing electric power line, and be sent to application terminal display monitor in real time, to guarantee the safe operation of circuit increase-volume, further increase transmission line increase-volume fail safe.

Safe operation limit calculates specifically by arranging conductor temperature limit (as 70 DEG C or 80 DEG C) and safety time, calculate: after appearance " N-1 " situation, there is deterioration (wind speed reduces to 0) in meteorological condition, in the safety time arranged, conductor temperature can not exceed the safe current limit of conductor temperature limit (70 DEG C or 80 DEG C).

Safe operation Time Calculation is specifically by arranging conductor temperature limit (as 70 DEG C or 80 DEG C) and running current limit, calculate: after appearance " N-1 " situation, there is deterioration (wind speed reduces to 0) in meteorological condition, under running current limit, conductor temperature can not exceed the safety time of conductor temperature limit (70 DEG C or 80 DEG C).

The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.

Claims (10)

1. a power transmission line dynamic capacity increase monitoring system, is characterized in that, comprises increase-volume data collection station, dynamic compatibilization server and is connected the application terminal of described dynamic compatibilization server,

Described increase-volume data collection station is used for carrying out Real-Time Monitoring to transmission line, obtains Monitoring Data and is sent to described dynamic compatibilization server; Described Monitoring Data comprises wire data message and environmental data information;

Described dynamic compatibilization server is used for the safe operation ampacity calculating described transmission line according to described Monitoring Data, and judges that described transmission line whether can increase-volume according to described safe operation ampacity; If so, then extract default increase-volume information and increase-volume is carried out to described transmission line; And when carrying out increase-volume to described transmission line, calculate the conducting wire sag data of described transmission line according to described Monitoring Data; And described Monitoring Data and conducting wire sag data are sent to the display of described application terminal.

2. power transmission line dynamic capacity increase monitoring system according to claim 1, is characterized in that, described wire data message comprises conductor temperature data and wire tension data; Described increase-volume data collection station comprises:

Temperature-detecting device, the conductor temperature Data Concurrent for transmission line described in Real-time Obtaining delivers to described dynamic compatibilization server;

Tension detecting apparatus, the wire tension Data Concurrent for transmission line described in Real-time Obtaining delivers to described dynamic compatibilization server.

3. power transmission line dynamic capacity increase monitoring system according to claim 1, is characterized in that, also comprises the GPRS communication server, and described increase-volume data collection station carries out data communication by the described GPRS communication server and described dynamic compatibilization server.

4. power transmission line dynamic capacity increase monitoring system according to claim 1, it is characterized in that, described application terminal also for receiving the described increase-volume information of described dynamic compatibilization server transmission and showing, and receives increase-volume operation information and is sent to described dynamic compatibilization server;

Described dynamic compatibilization server judge described transmission line can increase-volume time, according to described increase-volume information and increase-volume operation information, increase-volume is carried out to described transmission line.

5. power transmission line dynamic capacity increase monitoring system according to claim 4, it is characterized in that, described dynamic compatibilization server is also for when carrying out increase-volume to transmission line, calculate safe operation time and the safe operation limit of described transmission line according to described Monitoring Data, and be sent to the display of described application terminal.

6. an increase-volume monitoring method for power transmission line dynamic capacity increase monitoring system, is characterized in that, comprise the following steps:

Increase-volume data collection station carries out Real-Time Monitoring to transmission line, obtains Monitoring Data and is sent to dynamic compatibilization server; Described Monitoring Data comprises wire data message and environmental data information;

Described dynamic compatibilization server calculates the safe operation ampacity of described transmission line according to described Monitoring Data;

According to described safe operation ampacity, described dynamic compatibilization server judges that described transmission line whether can increase-volume;

If so, then extract default increase-volume information and increase-volume is carried out to described transmission line;

Described dynamic compatibilization server, when carrying out increase-volume to described transmission line, calculates the conducting wire sag data of described transmission line according to described Monitoring Data;

Described Monitoring Data and conducting wire sag data are sent to application terminal display by described dynamic compatibilization server.

7. the increase-volume monitoring method of power transmission line dynamic capacity increase monitoring system according to claim 6, is characterized in that, described dynamic compatibilization server calculates the step of the safe operation ampacity of described transmission line according to described Monitoring Data, comprise the following steps:

Obtain the operational mode of described transmission line; Described operational mode comprises steady state mode of operation and transient state operational mode;

If described transmission line is in steady state mode of operation, then basis calculate described safe operation ampacity; Temperature rise when described wire data message comprises wire current-carrying, wire diameter, conductive line surfaces radiation coefficient, wire heat absorption coefficient, alternating current-direct current resistance ratio and D.C. resistance, described environmental data information comprises wind speed, intensity of sunshine and ambient temperature;

Wherein, A=π ε SD [(θ+t _a+ 273) ⁴-(t _a+ 273) ⁴], temperature rise when θ is wire current-carrying, V is wind speed, and D is wire diameter, and ε is conductive line surfaces radiation coefficient, I _sfor intensity of sunshine, S is constant, t _afor ambient temperature, α _sfor wire heat absorption coefficient, K _tfor conductor temperature is θ+t _atime alternating current-direct current resistance ratio, R _dtfor conductor temperature is θ+t _atime D.C. resistance;

If described transmission line is in transient state operational mode, then basis or calculate described safe operation ampacity; Described wire data message comprises wire rated current, wire applies the electric current before short-term load (duty), wire preload factor, wire short-term load (duty) running time, wire thermal time constant, wire thermal capacitance, wire external thermal resistance, wire volumetric heat capacity coefficient, the volume of conductor, wire intermittent duty cycle and load call completing rate;

Wherein, x=I ₀/ I _n, τ=Q _c× T ₄, Q _c=c × v; I _tfor safe operation ampacity during short-term load (duty), I _nfor wire rated current, I ₀for wire applies the electric current before short-term load (duty), x is wire preload factor, and t is wire short-term load (duty) running time, and τ is wire thermal time constant, Q _cfor wire thermal capacitance, T ₄for wire external thermal resistance, c is wire volumetric heat capacity coefficient, and v is the volume of conductor; I _pfor safe operation ampacity during periodicity intermittent duty, p is the wire intermittent duty cycle, and α P is the load current currency, and α is load call completing rate.

8. the increase-volume monitoring method of power transmission line dynamic capacity increase monitoring system according to claim 6, is characterized in that, described Monitoring Data comprises the heat transfer coefficient of wire, conductor temperature, ambient temperature and conductor resistance; Described dynamic compatibilization server calculates the step of the safe operation ampacity of described transmission line according to described Monitoring Data, comprise the following steps:

According to calculate described safe operation ampacity; Wherein, I ' is safe operation ampacity, h ₇₀t () is heat transfer coefficient when conductor temperature is 70 degrees Celsius; T _afor ambient temperature, Q _rfor wire radiation heat loss due to radiation, Q _sfor solar heat increment, R ₇₀for resistance when conductor temperature is 70 degrees Celsius.

9. the increase-volume monitoring method of power transmission line dynamic capacity increase monitoring system according to claim 6, it is characterized in that, when described dynamic compatibilization server according to described safe operation ampacity judge described transmission line can not increase-volume time, also comprise described dynamic compatibilization server and described Monitoring Data and safe operation ampacity be sent to the step that data storage server carries out storing.

10. the increase-volume monitoring method of power transmission line dynamic capacity increase monitoring system according to claim 6, is characterized in that, when described dynamic compatibilization server according to described safe operation ampacity judge described transmission line can increase-volume time, further comprising the steps of:

Described dynamic compatibilization server, when carrying out increase-volume to transmission line, calculates safe operation time and the safe operation limit of described transmission line according to described Monitoring Data, and is sent to the display of described application terminal.