CN112013908A - Method for monitoring state of key stress point of overhead transmission line - Google Patents
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Abstract
A method for monitoring the state of a key stress point of an overhead transmission line comprises the steps of monitoring the overhead transmission line by using a monitoring system, wherein the monitoring system comprises: the intelligent stress point monitoring system comprises a key stress point monitoring module, an intelligent stress point operation state judging module, a power supply module, a communication module, a data processing and analyzing module and an intelligent early warning decision module. The invention provides a key monitoring method for key stress points of a power grid in on-line monitoring of a power transmission line, which is used for monitoring and analyzing all key risk points of the line in real time, and acquiring the running state and the change rule of each device of the key stress points by acquiring the stress distribution and the temperature distribution on the surface of a line device, so that the corresponding departments can maintain better.
Description
Technical Field
The invention relates to a method for monitoring the state of a key stress point of an overhead transmission line, belonging to the technical field of power industry.
Background
The strong smart grid construction requirement is increasingly urgent, and how to accelerate the realization of the strong smart grid is an important subject to which people face. At present, information technology, automation technology and big data technology are highly developed, good technical conditions are provided for power grid intellectualization, and all scientific research departments of a power grid system promote strong smart power grids to develop in different ways. On the other hand, it is to be clearly seen that although the intellectualization of the power grid in terms of operation management is continuously improved, accurate, comprehensive and instant online monitoring of the power transmission line is always established on the basis of the traditional sensors and the traditional power supply stacking, and the improvement in the technical essence is not achieved.
The transmission line has more device materials, and different components need to be connected by proper hardware, for example, a hardware string is connected with a ground wire by a wire clamp, the hardware string is connected with an iron tower by a hanging ring, new and old wires are connected by a preformed armor rod, and wires at a T joint are connected by the wire clamp, which are usually weak points of line operation, and various risk hidden dangers are easy to appear under different meteorological conditions. Therefore, in order to ensure the safe and reliable operation of the transmission line, the safety and the reliability of various key stress points of the power system must be ensured, and the hidden danger is thoroughly eliminated before the dangerous future.
Distributed fiber optic sensors are sensors that use unique distributed fiber optic detection techniques to measure or monitor spatially distributed and time varying information along a fiber optic transmission path. The sensing optical fiber is arranged along the field, and the information of the spatial distribution and the change with time of the measured field can be simultaneously obtained, so that the method has a plurality of attractions for a plurality of industrial applications. In recent years, the distributed optical fiber sensing technology has been developed greatly, the detection range is larger and larger, the measurement precision is higher and higher, the transmission direction also starts to be bidirectional, a functional short board which previously restricts the application of the distributed optical fiber sensing technology to the transmission line monitoring technology does not exist, and the distributed optical fiber sensing technology is an advanced digital monitoring technology suitable for on-line monitoring of the transmission line. The power transmission line utilizes the characteristics of high-precision measurement of component internal force information by the optical fiber sensor, large transmission distance and small influence, can perform comprehensive mechanical force monitoring analysis on the power transmission line, and guarantees reliable and stable operation of the power transmission line.
At present, the on-line monitoring of the power transmission line mainly monitors the materials of the power transmission line body, such as a tower, a foundation, a wire, an insulator and the like, and can rarely monitor the key stress point in a targeted manner.
In summary, from the practical significance, in the aspect of online detection of key stress points of overhead transmission lines, especially key stress points of extra-high voltage, extra-high voltage and main grid structures, a reasonable and effective method for monitoring the state of the key stress points of the overhead transmission lines does not exist.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a fine, accurate, reliable and comprehensive monitoring method for the state of the key stress point of the overhead transmission line.
The technical scheme of the invention is as follows:
a method for monitoring the state of a key stress point of an overhead transmission line comprises the steps of monitoring the overhead transmission line by using a monitoring system, wherein the monitoring system comprises: the intelligent stress point monitoring system comprises a key stress point monitoring module, an intelligent stress point operation state judging module, a power supply module, a communication module, a data processing and analyzing module and an intelligent early warning decision module;
the communication module is responsible for communication transmission between the key stress point monitoring module and the data processing and analyzing module; the power supply module supplies power to the modules;
the key stress point monitoring module comprises a distributed optical fiber sensing unit, a mechanical stress mathematical analysis unit and a key stress point classification unit; the key stress point monitoring module combines meteorological conditions according to stress characteristics, heating and heat dissipation characteristics and running states of different key stress points, such as: continuously acquiring material deformation and temperature variation of each key stress point under various meteorological conditions such as power frequency, strong wind, overvoltage, ice coating and the like; the monitoring time interval is very short and reaches the second level at present; the deformation of the line device under meteorological conditions of different temperatures, humidity, wind speeds, icing thicknesses, illumination and the like can be continuously detected, and the deformation curve and the change characteristics of the ground wire along with the change of the meteorological conditions are perfectly presented;
the intelligent stress point operation state judgment module is responsible for timely and correctly judging whether:
converting the stress distribution of the circuit device of each key stress point into a stress point fatigue state;
the stress distribution and vibration conditions of the circuit device of each key stress point are converted into stress point damage states;
the temperature distribution and the heating condition of the circuit device of each key stress point are converted into the heating state of the stress point;
the stress distribution, vibration condition and heating condition of the circuit device of each key stress point are converted into the stress point damage state;
the stress distribution, the temperature distribution and the heating condition of the circuit device of each key stress point are converted into the stress point aging degree state;
normal state thresholds of the fatigue state, the damage state, the heating state, the damage state and the aging degree state are respectively preset in the intelligent stress point operation state judgment module, and when the acquired data exceed the normal state thresholds, the intelligent stress point operation state judgment module judges that the corresponding line device is in a dangerous state and simultaneously displays an alarm;
the communication module is responsible for the safe transmission of monitoring information and mainly comprises two parts, namely wired transmission and wireless transmission, wherein the wired transmission mainly utilizes the existing communication channel of a power grid, and can consider to utilize one communication channel of the existing line OPGW;
the data processing and analyzing module comprises: the device comprises a data storage unit, a data analysis unit, a data display unit and an interaction unit;
the data storage unit is used for orderly storing and reliably classifying the detection information of the key stress point circuit device; the data analysis unit analyzes and manages the stress data of the tower in a refined manner by using advanced data analysis tools such as a big data technology, an internet + technology, a cloud computing technology and the like, analyzes the instantaneous stress change rule of each component of the line along with the change of ambient temperature, humidity, wind speed, ice coating thickness, illumination and other meteorological conditions, and finds line operation leaks and summarizes the line operation rule by combining the tidal current state of the system, so that reliable and rich data support is provided for a strong smart grid; the data display unit displays the line state data in a 3D mode by using various terminal devices, and truly reflects the simulated line state by combining VR wearable devices; the interaction unit can enable an operator to communicate with the data system, and behavior information of the operator is stored as a part of line detection data for reasonable analysis and accurate prediction;
the intelligent early warning decision module is responsible for receiving data information of all aspects, timely judging the state of the power transmission line, timely early warning when the state of the power transmission line is abnormal, completely eliminating potential safety hazards in operation and providing decision data support for operation management departments.
According to the invention, the power module is responsible for providing power for the whole system, and comprises the following modes:
according to the regional distribution condition of the overhead transmission line, combining the existing power supply conditions at the periphery, reasonably planning the position of the high-precision optical fiber sensing detection system, utilizing the existing power supply nearby, and if the conditions allow, using the power supply in a nearby transformer substation;
or, in a remote area, combining the long-term cost, and establishing a two-circuit line for the key stress point monitoring module. And the power supply reliability is ensured.
According to the optimization of the invention, in the key stress point monitoring module, the BOTDR or the BOTDA is reasonably selected by the distributed optical fiber sensing unit according to the importance degree of the power transmission line, the voltage grade and the section of the ground wire; determining the arrangement mode of the distributed optical fiber sensing units according to the size, shape, material and connection form factor tests of the line device at each risk point; the distributed optical fiber sensing unit consists of a series of high-precision optical fiber sensors, the BOTDR or BOTDA technology and other technologies are reasonably selected according to the importance degree of the power transmission line, the voltage level and the section of the ground wire, the distributed optical fiber sensors are distributed at each key stress point and risk point in different reasonable modes, and the distribution mode needs to be determined according to the size, the shape, the material, the connection form and other factors of the line device at each risk point in a test mode; the distributed optical fiber sensing unit can be completely used for important lines such as extra-high voltage, extra-high voltage and main grid structure, and has stable signals, high monitoring precision and strong reliability.
According to the present invention, in the key stress point monitoring module, the mechanical stress mathematical analysis unit performs high-precision mathematical modeling according to the line device deformation and temperature information collected by the optical fiber sensor: when the system monitors the environmental temperature and the deformation of the line device, the mechanical stress value corresponding to the line device is directly calculated; the mechanical stress mathematical analysis unit carries out high-precision mathematical modeling according to the deformation and temperature information of the line device collected by the optical fiber sensor, a mechanical analysis model of each key stress point needs to be determined through testing in a laboratory, the degree of accurate stress value and temperature value can be directly analyzed and calculated, the instant stress value received by the tower member is obtained through instant and rapid modeling analysis on the deformation of the line device, and the stress precision can completely meet the actual requirement of system state analysis.
According to the optimization of the invention, in the key stress point monitoring module, the key stress points on the line device are collected to obtain parameter values to be classified according to the connection positions of the conductive wires and the ground wires, the connection positions of the hardware guide wires and the ground wires, the connection positions of the hardware iron tower, the T-shaped contact, the breaking point, the shifting point, the structure connection point and the grounding point; the key stress point classifying unit is a self-adaptive system, can be automatically adapted to a corresponding mathematical analysis model according to the size and the property of real-time data, needs to be compared and analyzed in multiple aspects due to more types of key stress points on a circuit, and comprises a ground wire connecting part (in a gear), a hardware fitting ground wire connecting part, a hardware fitting iron tower connecting part, a T joint, a breaking point, a shifting point, a structure connecting point, grounding and the like.
The invention has the advantages that:
the invention provides a key monitoring method for key stress points of a power grid in on-line monitoring of a power transmission line, which is used for monitoring and analyzing all key risk points of the line in real time, and acquiring the running state and the change rule of each device of the key stress points by acquiring the stress distribution and the temperature distribution on the surface of a line device, so that the corresponding departments can maintain better.
The invention introduces a high-precision optical fiber sensing technology in the monitoring of the line device, and accurately detects the key stress point of the overhead transmission line, so that the on-line monitoring is more comprehensive and accurate.
The method utilizes the latest optical fiber sensing technology, firstly provides that an accurate instantaneous stress value is obtained by detecting the deformation of the line device, the stress value is analyzed, and the running state of each stressed material is accurately judged.
The invention utilizes the characteristic of large detection range of the optical fiber sensing technology, reasonably arranges the power supply of the whole system, has small investment, large effect, safe and reliable operation, long service life of dozens of years and less operation and maintenance work, and avoids the fatal defects of short service life and high cost of the power supply of the traditional online detection method.
The invention monitors the most essential stress and temperature of the ground wire, all the abnormal operation states which appear at present have direct relation with the stress and the temperature, analyzes and summarizes the change rule of the stress and the temperature, and can realize the real fine management of the ground wire.
The invention can realize monitoring and analysis of all states of key stress points, a stress point fatigue state judgment system, a stress point damage judgment system, a stress point heating judgment system, a stress point damage judgment system, a stress point aging degree judgment system and the like.
Drawings
FIG. 1 is a system test chart in the test method of the present invention.
Detailed Description
The following detailed description is made with reference to the embodiments and the accompanying drawings, but not limited thereto.
Examples 1,
A method for monitoring the state of a key stress point of an overhead transmission line comprises the steps of monitoring the overhead transmission line by using a monitoring system, wherein the monitoring system comprises: the intelligent stress point monitoring system comprises a key stress point monitoring module, an intelligent stress point operation state judging module, a power supply module, a communication module, a data processing and analyzing module and an intelligent early warning decision module;
the communication module is responsible for communication transmission between the key stress point monitoring module and the data processing and analyzing module; the power supply module supplies power to the modules;
the key stress point monitoring module comprises a distributed optical fiber sensing unit, a mechanical stress mathematical analysis unit and a key stress point classification unit; the key stress point monitoring module combines meteorological conditions according to stress characteristics, heating and heat dissipation characteristics and running states of different key stress points, such as: continuously acquiring material deformation and temperature variation of each key stress point under various meteorological conditions such as power frequency, strong wind, overvoltage, ice coating and the like; the monitoring time interval is very short and reaches the second level at present; the deformation of the line device under meteorological conditions of different temperatures, humidity, wind speeds, icing thicknesses, illumination and the like can be continuously detected, and the deformation curve and the change characteristics of the ground wire along with the change of the meteorological conditions are perfectly presented;
the intelligent stress point operation state judgment module is responsible for timely and correctly judging whether:
converting the stress distribution of the circuit device of each key stress point into a stress point fatigue state;
the stress distribution and vibration conditions of the circuit device of each key stress point are converted into stress point damage states;
the temperature distribution and the heating condition of the circuit device of each key stress point are converted into the heating state of the stress point;
the stress distribution, vibration condition and heating condition of the circuit device of each key stress point are converted into the stress point damage state;
the stress distribution, the temperature distribution and the heating condition of the circuit device of each key stress point are converted into the stress point aging degree state;
normal state thresholds of the fatigue state, the damage state, the heating state, the damage state and the aging degree state are respectively preset in the intelligent stress point operation state judgment module, and when the acquired data exceed the normal state thresholds, the intelligent stress point operation state judgment module judges that the corresponding line device is in a dangerous state and simultaneously displays an alarm;
further, the stress determination method of the overhead transmission line comprises the following steps:
determining loads of the power transmission line to comprise permanent loads and variable loads;
the parameters corresponding to the permanent load comprise: the self-gravity of the tower, the gravity of wires, insulators and hardware fittings and the gravity of other fixed equipment on the tower;
the parameters corresponding to the variable load comprise: wind load, icing load on electric wires and insulators, tension on the electric wires and stay wires, temporary load during construction and maintenance, secondary load caused by structural deformation and various vibration dynamic loads;
the wind load comprises wind loads of a ground wire, a pole tower and an insulator, and the calculation method comprises the following steps:
and (3) calculating wind load of the ground wire:
WX＝a·W0μz·μsc·d·Lp·sin2θ(1)
W0＝V2/1600 (2)
in formulas (1) and (2): wX-a standard value of horizontal wind load, kN, perpendicular to the direction of the wires and the ground wire;
a-wind pressure uneven coefficient;
μz-a wind pressure height variation coefficient;
μsc-form factor of wire or ground: the wire diameter is less than 17mm or 1.2 is taken when ice is coated (no matter the size of the wire diameter); when the wire diameter is greater than or equal to 17mm, taking 1.1;
d is the outer diameter of the wire or the ground wire or the calculated outer diameter during ice coating; taking the sum of the outer diameters of all sub-conductors, m, of the split conductor;
Lp-horizontal span of the bar, m;
theta is the angle between the wind direction and the direction of the wire or the ground wire;
W0-a reference wind pressure standard value, KN/m 2;
v is wind speed at the reference height, m/s.
Calculating tower wind load:
WS＝W0·μZ·μs·βz·D(3)
in formula (3): wS-a standard value of wind load acting on the shaft per unit length, kN/m;
μs-wind carrier shape factor;
βz-a shaft wind load adjustment factor;
d is the average value of the shaft diameter, m.
And (3) calculating the wind load of the insulator:
W1＝W0·μz·A1(4)
in formula (4): w1-standard value of wind load of insulator string, kN;
A1-calculated value of area of insulator string subjected to wind pressure, m2；
The tower material monitoring module is used for performing high-precision mathematical modeling f according to tower material member deformation information collected by the optical fiber sensor, and converting collected light wave frequency variation into temperature variation and shape variation of the tower material, wherein:
the temperature variation of the component is t-t0A × Δ λ, Δ λ is a frequency offset, and Δ λ is λ - λ0；
Change in shape of member Δ y-y0Where Δ λ is a frequency offset, and Δ λ is λ - λ0；
Wherein A, B is a coefficient of variation, determined by actual experimentation;
then converting the shape variable quantity of the tower material into an instantaneous stress value:
and (d) determining the specific expression by trial and error in a laboratory: therefore, a mechanical stress analysis model of the whole tower material of the tower is obtained, the accurate stress value and temperature value of the tower material are finally and directly calculated, and the instant stress value of the tower material component is obtained by performing instant and rapid modeling analysis on the tower material component deformation.
The communication module is responsible for the safe transmission of monitoring information and mainly comprises two parts, namely wired transmission and wireless transmission, wherein the wired transmission mainly utilizes the existing communication channel of a power grid, and can consider to utilize one communication channel of the existing line OPGW;
the data processing and analyzing module comprises: the device comprises a data storage unit, a data analysis unit, a data display unit and an interaction unit;
the data storage unit is used for orderly storing and reliably classifying the detection information of the key stress point circuit device; the data analysis unit analyzes and manages the stress data of the tower in a refined manner by using advanced data analysis tools such as a big data technology, an internet + technology, a cloud computing technology and the like, analyzes the instantaneous stress change rule of each component of the line along with the change of ambient temperature, humidity, wind speed, ice coating thickness, illumination and other meteorological conditions, and finds line operation leaks and summarizes the line operation rule by combining the tidal current state of the system, so that reliable and rich data support is provided for a strong smart grid; the data display unit displays the line state data in a 3D mode by using various terminal devices, and truly reflects the simulated line state by combining VR wearable devices; the interaction unit can enable an operator to communicate with the data system, and behavior information of the operator is stored as a part of line detection data for reasonable analysis and accurate prediction;
the intelligent early warning decision module is responsible for receiving data information of all aspects, timely judging the state of the power transmission line, timely early warning when the state of the power transmission line is abnormal, completely eliminating potential safety hazards in operation and providing decision data support for operation management departments.
The power module is responsible for providing the power for the whole system, and comprises the following modes:
according to the regional distribution condition of the overhead transmission line, combining the existing power supply conditions at the periphery, reasonably planning the position of the high-precision optical fiber sensing detection system, utilizing the existing power supply nearby, and if the conditions allow, using the power supply in a nearby transformer substation;
or, in a remote area, combining the long-term cost, and establishing a two-circuit line for the key stress point monitoring module. And the power supply reliability is ensured.
In the key stress point monitoring module, the BOTDR or the BOTDA is reasonably selected by the distributed optical fiber sensing unit according to the importance degree of the power transmission line, the voltage grade and the section of the ground wire; determining the arrangement mode of the distributed optical fiber sensing units according to the size, shape, material and connection form factor tests of the line device at each risk point; the distributed optical fiber sensing unit consists of a series of high-precision optical fiber sensors, the BOTDR or BOTDA technology and other technologies are reasonably selected according to the importance degree of the power transmission line, the voltage level and the section of the ground wire, the distributed optical fiber sensors are distributed at each key stress point and risk point in different reasonable modes, and the distribution mode needs to be determined according to the size, the shape, the material, the connection form and other factors of the line device at each risk point in a test mode; the distributed optical fiber sensing unit can be completely used for important lines such as extra-high voltage, extra-high voltage and main grid structure, and has stable signals, high monitoring precision and strong reliability.
In the key stress point monitoring module, the mechanical stress mathematical analysis unit performs high-precision mathematical modeling according to the deformation and temperature information of the circuit device collected by the optical fiber sensor: when the system monitors the environmental temperature and the deformation of the line device, the mechanical stress value corresponding to the line device is directly calculated; the mechanical stress mathematical analysis unit carries out high-precision mathematical modeling according to the deformation and temperature information of the line device collected by the optical fiber sensor, a mechanical analysis model of each key stress point needs to be determined through testing in a laboratory, the degree of accurate stress value and temperature value can be directly analyzed and calculated, the instant stress value received by the tower member is obtained through instant and rapid modeling analysis on the deformation of the line device, and the stress precision can completely meet the actual requirement of system state analysis.
In the key stress point monitoring module, collecting parameter values of key stress points on the line device, and classifying the parameter values according to the connection position of the ground wires, the connection position of the hardware wire and the hardware iron tower, the T contact, the breaking point, the shifting point, the structure connection point and the grounding point; the key stress point classifying unit is a self-adaptive system, can be automatically adapted to a corresponding mathematical analysis model according to the size and the property of real-time data, needs to be compared and analyzed in multiple aspects due to more types of key stress points on a circuit, and comprises a ground wire connecting part (in a gear), a hardware fitting ground wire connecting part, a hardware fitting iron tower connecting part, a T joint, a breaking point, a shifting point, a structure connecting point, grounding and the like.
Claims (5)
1. A method for monitoring the state of a key stress point of an overhead transmission line is characterized by comprising the following steps of monitoring the overhead transmission line by using a monitoring system, wherein the monitoring system comprises: the intelligent stress point monitoring system comprises a key stress point monitoring module, an intelligent stress point operation state judging module, a power supply module, a communication module, a data processing and analyzing module and an intelligent early warning decision module;
the communication module is responsible for communication transmission between the key stress point monitoring module and the data processing and analyzing module; the power supply module supplies power to the modules;
the key stress point monitoring module comprises a distributed optical fiber sensing unit, a mechanical stress mathematical analysis unit and a key stress point classification unit; the key stress point monitoring module is used for continuously acquiring the material deformation quantity and the temperature variation quantity of each key stress point according to the stress characteristics, the heating and radiating characteristics and the running state of different key stress points and in combination with meteorological conditions;
the intelligent stress point operation state judgment module is responsible for timely and correctly judging whether:
converting the stress distribution of the circuit device of each key stress point into a stress point fatigue state;
the stress distribution and vibration conditions of the circuit device of each key stress point are converted into stress point damage states;
the temperature distribution and the heating condition of the circuit device of each key stress point are converted into the heating state of the stress point;
the stress distribution, vibration condition and heating condition of the circuit device of each key stress point are converted into the stress point damage state;
the stress distribution, the temperature distribution and the heating condition of the circuit device of each key stress point are converted into the stress point aging degree state;
normal state thresholds of the fatigue state, the damage state, the heating state, the damage state and the aging degree state are respectively preset in the intelligent stress point operation state judgment module, and when the acquired data exceed the normal state thresholds, the intelligent stress point operation state judgment module judges that the corresponding line device is in a dangerous state and simultaneously displays an alarm;
the communication module is responsible for the safe transmission of monitoring information and mainly comprises two parts, namely wired transmission and wireless transmission, wherein the wired transmission mainly utilizes the existing communication channel of a power grid, and can consider to utilize one communication channel of the existing line OPGW;
the data processing and analyzing module comprises: the device comprises a data storage unit, a data analysis unit, a data display unit and an interaction unit;
the data storage unit is used for orderly storing and reliably classifying the detection information of the key stress point circuit device; the data analysis unit is used for carrying out refined analysis and management on the stress data of the pole tower, analyzing the instantaneous stress change rule of each component of the line along with the change of ambient temperature, humidity, wind speed, ice coating thickness, illumination and other meteorological conditions, and searching line operation leaks and summarizing line operation rules by combining the tidal current state of the system; the data display unit displays the line state data in a 3D mode by utilizing various terminal devices;
the intelligent early warning decision module is responsible for receiving data information of all aspects, timely judging the state of the power transmission line, timely early warning when the state of the power transmission line is abnormal, completely eliminating potential safety hazards in operation and providing decision data support for operation management departments.
2. The method for monitoring the state of the key stress point of the overhead transmission line according to claim 1, wherein the power module is responsible for providing power for the whole system, and the method comprises the following steps:
according to the regional distribution condition of the overhead transmission line, combining the existing power supply conditions at the periphery, using power supplies in nearby substations;
or, a two-circuit line is newly built for the key stress point monitoring module.
3. The method for monitoring the state of the key stress point of the overhead transmission line according to claim 1, wherein in the key stress point monitoring module, the BOTDR or the BOTDA is reasonably selected by the distributed optical fiber sensing unit according to the importance degree, the voltage level and the section of the ground wire of the transmission line; and determining the arrangement mode of the distributed optical fiber sensing units according to the size, shape, material and connection form factor tests of the line device at each risk point.
4. The method for monitoring the state of the key stress point of the overhead transmission line according to claim 3, wherein in the key stress point monitoring module, the mechanical stress mathematical analysis unit performs high-precision mathematical modeling according to line device deformation and temperature information acquired by the optical fiber sensor: when the system monitors the environmental temperature and the deformation of the line device, the mechanical stress value corresponding to the line device is directly calculated and obtained.
5. The method for monitoring the state of the key stress point of the overhead transmission line according to claim 4, wherein the key stress point monitoring module classifies the acquired parameter values of the key stress point on the line device according to a ground wire connection position, a hardware fitting iron tower connection position, a T contact, a breaking point, a transposition point, a structure connection point and a grounding point.
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| CN102042885A (en) * | 2010-10-08 | 2011-05-04 | 电子科技大学 | Device for monitoring state of power transmission line tower-line system |
| CN204202570U (en) * | 2014-11-05 | 2015-03-11 | 石家庄职业技术学院 | A kind of Long span power transmission line deformation monitoring system based on system wireless sensor network technology |
| CN104458079A (en) * | 2014-12-09 | 2015-03-25 | 国家电网公司 | Health monitoring method of distribution type optical fiber sensing pole and tower |
| CN106404240A (en) * | 2015-10-14 | 2017-02-15 | 北京信息科技大学 | Undercarriage external load real-time monitoring method based on optical fiber grating sensor |
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| CN105740546A (en) * | 2016-02-01 | 2016-07-06 | 国家电网公司 | Transmission tower and ground wire security evaluation and service life prediction system based on corrosion state |
| CN105783756A (en) * | 2016-03-18 | 2016-07-20 | 西安工程大学 | Fiber-grating-based power transmission line iron tower deformation on-line monitoring device and method |
| CN108548568A (en) * | 2018-07-13 | 2018-09-18 | 广东电网有限责任公司江门供电局 | A kind of transmission tower on-line monitoring system with load-bearing monitor |
| CN109145455A (en) * | 2018-08-24 | 2019-01-04 | 国网山东省电力公司电力科学研究院 | A kind of monitoring point choosing method for power transmission tower mechanical property testing |
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