CN102768029A - Method and device for industrial control by aid of sag monitoring - Google Patents
Method and device for industrial control by aid of sag monitoring Download PDFInfo
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- CN102768029A CN102768029A CN2012102587533A CN201210258753A CN102768029A CN 102768029 A CN102768029 A CN 102768029A CN 2012102587533 A CN2012102587533 A CN 2012102587533A CN 201210258753 A CN201210258753 A CN 201210258753A CN 102768029 A CN102768029 A CN 102768029A
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Abstract
The invention discloses a method for industrial control by the aid of sag monitoring. The method includes building a temperature field model of a power transmission line according to various parameters affecting a temperature field of the power transmission line; obtaining numerical values of the parameters; computing temperature values of the power transmission line; computing sag values of the power transmission line; and carrying out industrial control according to the computed sag values of the power transmission line. The invention further discloses a device for industrial control by the aid of sag monitoring. The temperature field model of the power transmission line is built according to the parameters affecting the temperature field of the power transmission line. Equipment does not need to be additionally mounted on the power transmission line when the temperature values of the power transmission line are computed. The sag values of the power transmission line can be further computed and the industrial control can be carried out according to the computed temperature values. The total power transmission line can be monitored and controlled when the sag monitoring and the industrial control are carried out due to the fact that cost for mounting the monitoring equipment on the power transmission line is saved.
Description
Technical field
The present invention relates to the sag monitoring technical field of transmission line of electricity, relate in particular to a kind of method and a kind of device that carries out Industry Control through the sag monitoring that carries out Industry Control through the sag monitoring.
Background technology
Sag is one of important indicator of circuit transmission facility operation maintenance, and its size is directly connected to the safe and stable operation of transmission line of electricity.Transmission line of electricity makes its sag that bigger variation can correspondingly take place owing to standing the influence of weather conditions such as occurring in nature icing, temperature rise and wind for a long time.And because the needs that increase owing to power load in recent years, many existing transmission lines of electricity have been brought up to 80 ℃ with the highest operation allowable temperature of transmission line of electricity from 70 ℃ in order to improve transport capacity.In this case, the sag of transmission line of electricity just becomes main restraining factors.In sum, need monitor in real time, use it for Industry Control, to guarantee safe operation of electric network to the sag of transmission line of electricity.
The method of often using in recent years that sag is carried out on-line monitoring mainly contains: calculate the method for sag, method and method through taking observation shelves image calculation sag etc. through measuring hitch point inclination angle estimation sag through the monitoring conductor temperature.These ways need be installed corresponding measuring sensor and perhaps taken equipment such as camera on transmission line of electricity, because the input of these equipment is often bigger, can't realize monitoring completely.Also promptly can only accomplish the sag of transmission line of electricity is optionally monitored, the effective range of Industry Control is restricted, and is unfavorable for the comprehensive monitoring and the control of electric power netting safe running.
Summary of the invention
Based on this, the invention provides a kind of method and a kind of device that carries out Industry Control through the sag monitoring that carries out Industry Control through the sag monitoring.
A kind ofly carry out the method for Industry Control, may further comprise the steps through sag monitoring:
According to each parameter that influences the transmission line of electricity temperature field, set up the models for temperature field of transmission line of electricity;
Obtain the said numerical value that influences each parameter in transmission line of electricity temperature field;
According to the numerical value of said each parameter of obtaining and the said models for temperature field of foundation, the temperature value of computing electric power line;
According to the said temperature value that calculates, calculate the sag of said transmission line of electricity;
Sag according to the said transmission line of electricity that calculates carries out Industry Control.
Compare with general technology, the present invention monitors the method for carrying out Industry Control through sag, through influencing each parameter in transmission line of electricity temperature field, has set up the models for temperature field of transmission line of electricity.Because influence the numerical value of each parameter in transmission line of electricity temperature field can be through the acquisition of existing operation of power networks control system, thus when the computing electric power line temperature value, do not need extra on transmission line of electricity erecting equipment.According to the temperature value that calculates, the further sag of computing electric power line and utilize sag to carry out Industry Control.When carrying out sag monitoring and Industry Control,, can realize all fronts monitoring and the control of transmission line of electricity owing to saved the cost that monitoring equipment is installed on transmission line of electricity through the present invention.
A kind ofly carry out the device of Industry Control, comprise model building module, parameter values acquisition module, temperature value computing module, sag monitoring modular and industrial control module through sag monitoring;
Said model building module is used for setting up the models for temperature field of transmission line of electricity according to each parameter that influences the transmission line of electricity temperature field;
Said parameter values acquisition module is used to obtain the said numerical value that influences each parameter in transmission line of electricity temperature field;
Said temperature value computing module is used for according to the numerical value of said each parameter of obtaining and the said models for temperature field of foundation, the temperature value of computing electric power line;
Said sag monitoring modular is used for calculating the sag of said transmission line of electricity according to the said temperature value that calculates;
Said industrial control module is used for carrying out Industry Control according to the sag of the said transmission line of electricity that calculates.
Compare with general technology, the present invention monitors the device that carries out Industry Control through sag, through influencing each parameter in transmission line of electricity temperature field, has set up the models for temperature field of transmission line of electricity.Because influence the numerical value of each parameter in transmission line of electricity temperature field can be through the acquisition of existing operation of power networks control system, thus when the computing electric power line temperature value, do not need extra on transmission line of electricity erecting equipment.According to the temperature value that calculates, the further sag of computing electric power line and utilize sag to carry out Industry Control.When carrying out sag monitoring and Industry Control,, can realize all fronts monitoring and the control of transmission line of electricity owing to saved the cost that monitoring equipment is installed on transmission line of electricity through the present invention.
Description of drawings
Fig. 1 is the present invention carries out the method for Industry Control through the sag monitoring a schematic flow sheet;
Fig. 2 is the present invention carries out the device of Industry Control through the sag monitoring a structural representation.
Embodiment
Be further set forth the present invention technological means of being taked and the effect that obtains,,, know and complete description technical scheme of the present invention below in conjunction with accompanying drawing and preferred embodiment.
See also Fig. 1, carry out the schematic flow sheet of the method for Industry Control for the present invention through the sag monitoring.The method that the present invention carries out Industry Control through the sag monitoring may further comprise the steps:
S101 sets up the models for temperature field of transmission line of electricity according to each parameter that influences the transmission line of electricity temperature field;
Said each parameter that influences the transmission line of electricity temperature field can comprise one or more in electric current, voltage, load, model, design sag, the specific heat capacity numerical value of transmission line of electricity material, the transmission line of electricity of transmission line of electricity corresponding environment temperature, intensity of solar radiation and the wind speed.
The loss that electrical equipment produces during through electric current comprises: the ohmic loss of current-carrying pole line (being transmission line of electricity), inner dielectric loss and magnetic hysteresis in the hardware and the eddy current loss etc. of insulating material, these losses make the temperature of electrical equipment raise.
The heat of pole line ohmic loss has:
Wherein,
The heat that pole line absorbs solar radiation has:
Q
t＝E
tA
tD
Pole line heat loss through convection amount has:
Q
d＝a
t(θ
W-θ
O)F
1
Wherein, F
1=π D.
Pole line heat loss through radiation amount has:
Conductor heat conduction and heat radiation amount has:
In the above-mentioned formula, K
fBe the skin effect coefficient of pole line, relevant with the shape and size of the frequency of electric current, pole line; I
WThe electric current that passes through for pole line; R
AcAC resistance for pole line; θ
WBe the pole line temperature; θ
0Be surrounding air (environment) temperature; a
tBe Natural Heat Convection coefficient, wherein a
t=1.5 (θ
W-θ
0)
0.35E
tBe solar radiation power density; A
tAbsorptivity for pole line; D is the diameter of pole line; F
1For unit length lead area of dissipation, relevant with factors such as conductor size, arrangements; λ is a pole line specific heat capacity coefficient; δ is a pole line sub-conductor thickness.
According to conservation of energy principle, during steady state (SS): Q
R+ Q
t=Q
d+ Q
f+ Q
hGo out the thermal change of lead through the change calculations of above-mentioned each parameter, thereby calculate the temperature rise of lead.Can draw the sag of lead according to the stress state equation of circuit mechanics according to the lead temperature rise.
Can the temperature field be analyzed under various physical environments and loading condiction through the aerial condutor (being transmission line of electricity) to model commonly used; Utilize Computer Numerical Simulation and site test; Find out the specific heat capacity numerical value of the conductor material of common structure, thereby the temperature of aerial condutor is accurately calculated.
S102 obtains the said numerical value that influences each parameter in transmission line of electricity temperature field;
Can obtain the numerical value of each parameter that influences the transmission line of electricity temperature field through the mode of setting up software systems.For example set up the software systems that comprise basic information system, energy information acquisition system, external information acquisition system and four parts of total management system.First three system carries out low layer information acquisition work, is done the COMPREHENSIVE CALCULATING of data and various application layer services are provided by the COMPREHENSIVE CALCULATING management system.
Basic information system can provide the basic data guarantee.This part can contain equipment account and operation information, for example: Back ground Informations such as wire type, design sag, safety coefficient, span, measurement sag.Editor's maintenance work that this part also can allow the user to be correlated with simultaneously provides effective maintenance interface, can make things convenient for that the O&M personnel are efficient and convenient to carry out updating maintenance.
The energy information acquisition system; This part can be obtained the real-time monitoring information of electrical network through the mode that acquisition interface combines with EMS (existed system), and the parameter of obtaining can comprise: overhead transmission line real-time current, overhead transmission line real-time voltage and information on load.Be the safe and reliable of guarantee information simultaneously, but the SSL encryption system of special, and the information that is about to get access to is carried out encryption, carries out the mode of decryption processing after the transmission again.
External information acquisition system, this part can adopt the mode of software interface and weather bureau's weather forecast to get in touch in real time, obtain the real-time weather data of part.When the data that exist meteorological department not detect or issue, this system also can provide interface to make an inspection tour station by each distributed points to carry out obtaining of weather data, for example meteorologic parameter such as solar radiation, ice covering thickness.
S103 is according to the numerical value of said each parameter of obtaining and the said models for temperature field of foundation, the temperature value of computing electric power line;
Through the true overhead transmission line service condition of simulation in laboratory, numerical simulation, external environment; Multianalysis has been carried out in the conductor temperature field; Draw the specific heat capacity data of different model steel-cored aluminium strand through test, for example analyze and draw the specific heat capacity numerical value rule of this sandwich of steel-cored aluminium strand.According to the models for temperature field of setting up, can models for temperature field be carried out numerical simulation calculation through the mode of computer programming.Three-dimensional simulation is carried out in the aerial condutor temperature field, obtained each data parameters of temperature environment, system model is carried out sunykatuib analysis, obtain the accurate temperature data of aerial condutor arbitrfary point through finite element analysis method.After obtaining conductor temperature data accurately, can calculate the sag of aerial condutor according to the state equation of overhead power transmission conducting wire.
S104 calculates the sag of said transmission line of electricity according to the said temperature value that calculates;
As one of them embodiment, can calculate the sag of said transmission line of electricity through the transmission line of electricity state equation.
Any point sag f on the transmission line of electricity
xCan adopt like the declivity parabolic formula and calculate:
Wherein, l is the span of each grade in the transmission line of electricity; γ comprehensively on the circuit unit level projected length comprises from anharmonic ratio and carries than carrying, wind pressure ratio carry with icing than year; σ
0For with than carrying the perpendicular meridional stress component of active line, also claim horizontal stress, its value is identical everywhere at each point of electric wire, wherein σ
0Calculating and step S103 in the temperature value that draws relevant; H is the lead hitch point discrepancy in elevation; β is each grade pole line hitch point height difference angle, wherein β=arctan (h/l) in the transmission line of electricity.
For example, according to the software systems that comprise basic information system, energy information acquisition system, external information acquisition system and four parts of total management system of above-mentioned foundation.Total management system can be got in touch other three module work, carries out COMPREHENSIVE CALCULATING.According to the data that three system acquisition arrive, total management system can be carried out overall treatment, i.e. evaluation to information.Make a strategic decision to the operations staff according to the numerical value situation information of sending, the services such as statistical study and form derivation of data also can be provided simultaneously.
S105 carries out Industry Control according to the sag of the said transmission line of electricity that calculates.
As one of them embodiment, can judge whether the sag of the said transmission line of electricity of calculating surpasses preset sag scope;
If the sag of said transmission line of electricity has surpassed preset sag scope, then send the alarm signal of the ultra scope of sag.
Calculate after the sag of said transmission line of electricity, can be widely used in each control field of operation of power networks, like sag monitoring alarm, network load prediction and control etc.Based on the system software platform that the present invention develops, can realize the real-time sag monitoring of shelves arbitrarily of any transmission line of electricity.Through the contrast of real-time monitoring sag data and design load or service data, realize instructing the dynamic compatibilization of operation of power networks.Can realize also that simultaneously any span whole day of any transmission line of electricity monitors automatically, as the circuit of operating standard setting occurring surpassing, send warning automatically, rapid reaction goes out the position, reports to the operations staff and in time handles.
Compare with general technology, the present invention monitors the method for carrying out Industry Control through sag, through influencing each parameter in transmission line of electricity temperature field, has set up the models for temperature field of transmission line of electricity.Because influence the numerical value of each parameter in transmission line of electricity temperature field can be through the acquisition of existing operation of power networks control system, thus when the computing electric power line temperature value, do not need extra on transmission line of electricity erecting equipment.According to the temperature value that calculates, the further sag of computing electric power line and utilize sag to carry out Industry Control.When carrying out sag monitoring and Industry Control,, can realize all fronts monitoring and the control of transmission line of electricity owing to saved the cost that monitoring equipment is installed on transmission line of electricity through the present invention.
The present invention need not to install a large amount of monitoring elements on aerial condutor (being transmission line of electricity); Do not need hot line job, thereby do not influence the ordinary production operation.In addition, the pilot process desired data is from the power network monitoring end, and Data Source is stable, no instantaneous mutation, so Monitoring Data is more accurate.The present invention has disclosed the relation between temperature and the sag, and the angle outside on-line monitoring is better monitored the sag variation.Owing to monitoring element need be installed, reduced investment significantly, be easy to promote and maintenance.Realization truly the sag of extensive overhead transmission line monitor in real time.The present invention can realize and the combining of existing production run system, and has improved property easy to use, effectively reduces operation maintenance personnel's operation easier, but has improved the generalization of system.
In addition, a kind of device that carries out Industry Control through the sag monitoring is also disclosed.
See also Fig. 2, carry out the structural representation of the device of Industry Control for the present invention through the sag monitoring.The present invention monitors the device that carries out Industry Control through sag, comprises model building module 201, parameter values acquisition module 202, temperature value computing module 203, sag monitoring modular 204 and industrial control module 205;
Said model building module 201 is used for setting up the models for temperature field of transmission line of electricity according to each parameter that influences the transmission line of electricity temperature field;
Said each parameter that influences the transmission line of electricity temperature field comprises one or more in electric current, voltage, load, model, design sag, the specific heat capacity numerical value of transmission line of electricity material, the transmission line of electricity of transmission line of electricity corresponding environment temperature, intensity of solar radiation and the wind speed.
Said parameter values acquisition module 202 is used to obtain the said numerical value that influences each parameter in transmission line of electricity temperature field;
Parameter values acquisition module 202 can obtain the numerical value of each parameter that influences the transmission line of electricity temperature field through the mode of software systems.For example set up the software systems that comprise basic information system, energy information acquisition system, external information acquisition system and four parts of total management system.Parameter values acquisition module 202 carries out low layer information acquisition work through first three system.
Said temperature value computing module 203 is used for according to the numerical value of said each parameter of obtaining and the said models for temperature field of foundation, the temperature value of computing electric power line;
Through the true overhead transmission line service condition of simulation in laboratory examination, numerical simulation, external environment; Multianalysis has been carried out in the conductor temperature field; Draw the specific heat capacity data of different model steel-cored aluminium strand through test, for example analyze and draw the specific heat capacity numerical value rule of this sandwich of steel-cored aluminium strand.According to the models for temperature field of setting up, can models for temperature field be carried out numerical simulation calculation through the mode of computer programming.Three-dimensional simulation is carried out in the aerial condutor temperature field, obtained each data parameters of temperature environment, system model is carried out sunykatuib analysis, obtain the accurate temperature data of aerial condutor arbitrfary point through finite element analysis method.Temperature value computing module 203 can calculate the sag of aerial condutor according to the state equation of overhead power transmission conducting wire after obtaining conductor temperature data accurately.
Said sag monitoring modular 204 is used for calculating the sag of said transmission line of electricity according to the said temperature value that calculates;
As one of them embodiment, said sag monitoring modular can calculate the sag of said transmission line of electricity through the transmission line of electricity state equation.
Any point sag f on the transmission line of electricity
xCan adopt like the declivity parabolic formula and calculate:
Wherein, l is the span of each grade in the transmission line of electricity; γ comprehensively on the circuit unit level projected length comprises from anharmonic ratio and carries than carrying, wind pressure ratio carry with icing than year; σ
0For with than carrying the perpendicular meridional stress component of active line, also claim horizontal stress, its value is identical everywhere at each point of electric wire, wherein σ
0Calculating and step S103 in the temperature value that draws relevant; H is the lead hitch point discrepancy in elevation; β is each grade pole line hitch point height difference angle, wherein β=arctan (h/l) in the transmission line of electricity.
Said industrial control module 205 is used for carrying out Industry Control according to the sag of the said transmission line of electricity that calculates.
As one of them embodiment, said industrial control module 205 can comprise judge module and alarm signal sending module;
Said judge module is used to judge whether the sag of the said transmission line of electricity of calculating surpasses preset sag scope;
Said alarm signal sending module is used for when the sag of said transmission line of electricity has surpassed preset sag scope, sending the alarm signal of the ultra scope of sag.
Calculate after the sag of said transmission line of electricity, can be widely used in each control field of operation of power networks, like sag monitoring alarm, network load prediction and control etc.Based on the system software platform that the present invention develops, can realize the real-time sag monitoring of shelves arbitrarily of any transmission line of electricity.Through the contrast of real-time monitoring sag data and design load or service data, realize instructing the dynamic compatibilization of operation of power networks.Can realize also that simultaneously any span whole day of any transmission line of electricity monitors automatically, as the circuit of operating standard setting occurring surpassing, send warning automatically, rapid reaction goes out the position, reports to the operations staff and in time handles.
Compare with general technology, the present invention monitors the device that carries out Industry Control through sag, through influencing each parameter in transmission line of electricity temperature field, has set up the models for temperature field of transmission line of electricity.Because influence the numerical value of each parameter in transmission line of electricity temperature field can be through the acquisition of existing operation of power networks control system, thus when the computing electric power line temperature value, do not need extra on transmission line of electricity erecting equipment.According to the temperature value that calculates, the further sag of computing electric power line and utilize sag to carry out Industry Control.When carrying out sag monitoring and Industry Control,, can realize all fronts monitoring and the control of transmission line of electricity owing to saved the cost that monitoring equipment is installed on transmission line of electricity through the present invention.
The above embodiment has only expressed several kinds of embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with accompanying claims.
Claims (8)
1. one kind is carried out the method for Industry Control through sag monitoring, it is characterized in that, may further comprise the steps:
According to each parameter that influences the transmission line of electricity temperature field, set up the models for temperature field of transmission line of electricity;
Obtain the said numerical value that influences each parameter in transmission line of electricity temperature field;
According to the numerical value of said each parameter of obtaining and the said models for temperature field of foundation, the temperature value of computing electric power line;
According to the said temperature value that calculates, calculate the sag of said transmission line of electricity;
Sag according to the said transmission line of electricity that calculates carries out Industry Control.
2. method of carrying out Industry Control through the sag monitoring according to claim 1; It is characterized in that said each parameter that influences the transmission line of electricity temperature field comprises one or more in electric current, voltage, load, model, design sag, the specific heat capacity numerical value of transmission line of electricity material, the transmission line of electricity of transmission line of electricity corresponding environment temperature, intensity of solar radiation and the wind speed.
3. according to claim 1ly carry out the method for Industry Control, it is characterized in that, in the step of the sag of the said transmission line of electricity of said calculating, calculate the sag of said transmission line of electricity through the transmission line of electricity state equation through sag monitoring.
4. according to claim 1ly carry out the method for Industry Control, it is characterized in that said sag according to the said transmission line of electricity that calculates carries out the step of Industry Control, may further comprise the steps through sag monitoring:
Whether the sag of judging the said transmission line of electricity that calculates surpasses preset sag scope;
If the sag of said transmission line of electricity has surpassed preset sag scope, then send the alarm signal of the ultra scope of sag.
5. one kind is carried out the device of Industry Control through sag monitoring, it is characterized in that, comprises model building module, parameter values acquisition module, temperature value computing module, sag monitoring modular and industrial control module;
Said model building module is used for setting up the models for temperature field of transmission line of electricity according to each parameter that influences the transmission line of electricity temperature field;
Said parameter values acquisition module is used to obtain the said numerical value that influences each parameter in transmission line of electricity temperature field;
Said temperature value computing module is used for according to the numerical value of said each parameter of obtaining and the said models for temperature field of foundation, the temperature value of computing electric power line;
Said sag monitoring modular is used for calculating the sag of said transmission line of electricity according to the said temperature value that calculates;
Said industrial control module is used for carrying out Industry Control according to the sag of the said transmission line of electricity that calculates.
6. the device that carries out Industry Control through the sag monitoring according to claim 5; It is characterized in that said each parameter that influences the transmission line of electricity temperature field comprises one or more in electric current, voltage, load, model, design sag, the specific heat capacity numerical value of transmission line of electricity material, the transmission line of electricity of transmission line of electricity corresponding environment temperature, intensity of solar radiation and the wind speed.
7. according to claim 5ly carry out the device of Industry Control, it is characterized in that said sag monitoring modular calculates the sag of said transmission line of electricity through the transmission line of electricity state equation through sag monitoring.
8. according to claim 5ly carry out the device of Industry Control, it is characterized in that said industrial control module comprises judge module and alarm signal sending module through sag monitoring;
Said judge module is used to judge whether the sag of the said transmission line of electricity of calculating surpasses preset sag scope;
Said alarm signal sending module is used for when the sag of said transmission line of electricity has surpassed preset sag scope, sending the alarm signal of the ultra scope of sag.
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| CN103439898A (en) * | 2013-09-09 | 2013-12-11 | 天津理工大学 | Method for reconstructing and monitoring temperature field online in industrial heating furnace |
| CN103439898B (en) * | 2013-09-09 | 2015-09-09 | 天津理工大学 | A kind of industry heating temperature field in furnace on-line reorganization and monitoring method |
| CN104061837A (en) * | 2014-05-30 | 2014-09-24 | 国家电网公司 | Sag measurement device for iron tower grounding wire |
| CN104061837B (en) * | 2014-05-30 | 2016-10-05 | 国家电网公司 | A kind of steel tower sag of conductor and ground wire measurement apparatus |
| CN104215180A (en) * | 2014-08-20 | 2014-12-17 | 国家电网公司 | Wireless sensor network based power transmission line sag detection device |
| CN105703264A (en) * | 2014-11-28 | 2016-06-22 | 云南电网公司临沧供电局 | Damaged restoration control method of high-voltage transmission line conducting ground wire |
| CN104406558A (en) * | 2014-12-16 | 2015-03-11 | 云南电网有限责任公司普洱供电局 | Method for monitoring power transmission line sag |
| CN104406558B (en) * | 2014-12-16 | 2017-05-03 | 云南电网有限责任公司普洱供电局 | Method for monitoring power transmission line sag |
| CN105117586A (en) * | 2015-07-29 | 2015-12-02 | 广东电网有限责任公司电力科学研究院 | Transmission conductor response sensibility analysis method based on direct differential method |
| CN105976360A (en) * | 2016-04-27 | 2016-09-28 | 中国科学技术大学先进技术研究院 | Power transmission line sag measurement method based on infrared camera image processing |
| CN107045596A (en) * | 2017-05-09 | 2017-08-15 | 广东电网有限责任公司珠海供电局 | The method and device that analysis atmospheric conditions parameter influences on the air gap discharge voltage |
| CN108955609A (en) * | 2018-05-28 | 2018-12-07 | 广东电网有限责任公司 | Aerial cable sag computing method and device |
| CN109084687A (en) * | 2018-08-29 | 2018-12-25 | 广东电网有限责任公司 | Sag computing method and device thereof based on unmanned plane lidar measurement technology |
| CN109817352A (en) * | 2018-12-19 | 2019-05-28 | 广东美的暖通设备有限公司 | Power wire determines method and system, terminal, air conditioner and storage medium |
| CN110849326A (en) * | 2019-12-25 | 2020-02-28 | 深圳供电局有限公司 | Telegraph pole monitoring method and monitoring equipment |
| CN110849326B (en) * | 2019-12-25 | 2022-06-07 | 深圳供电局有限公司 | Telegraph pole monitoring method and monitoring equipment |
| CN111666690A (en) * | 2020-06-11 | 2020-09-15 | 海南电网有限责任公司 | Sag analysis method, device, equipment and medium for transmission line conductor |
| CN111666690B (en) * | 2020-06-11 | 2023-10-20 | 海南电网有限责任公司 | Sag analysis method, device, equipment and medium for transmission line wires |
| CN112525260A (en) * | 2020-11-20 | 2021-03-19 | 杭州一益信息技术有限公司 | Conductor sag double-identification monitoring method |
| CN112525260B (en) * | 2020-11-20 | 2022-04-29 | 杭州一益信息技术有限公司 | Conductor sag double-identification monitoring method |
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