CN110567518A - Dynamic capacity expansion system and method based on power transmission line temperature measurement - Google Patents
Dynamic capacity expansion system and method based on power transmission line temperature measurement Download PDFInfo
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Abstract
The invention discloses a dynamic capacity expansion system based on power transmission line temperature measurement, which comprises a data monitoring device, a data acquisition device and a terminal processing device, wherein the data monitoring device comprises a first temperature sensor, a second temperature sensor, an inclination angle sensor and an air speed sensor, the data monitoring device is in communication connection with the data acquisition device, the data acquisition device is in communication connection with the terminal processing device, and the terminal processing device is used for predicting the transmission capacity allowance of the power transmission line for a certain period of time in the future according to transmitted data and realizing dynamic capacity expansion of the power transmission line based on the transmission capacity allowance of the power transmission line, so that the power transmission line is sufficiently loaded, and the operating efficiency of the power transmission line is improved.
Description
Technical Field
the invention belongs to the technical field of power supply, and particularly relates to a dynamic capacity expansion system and method based on power transmission line temperature measurement.
background
the temperature of the power transmission line and the sag of the power transmission line are increased along with the increase of the power transmission capacity of the power transmission line, and the allowable transmission capacity of the power transmission line is greatly different in different environments, such as severe cold winter and hot summer, under the influence of the real-time temperature of the environment around the power transmission line; for example, windless weather and weather of heavy wind, influenced by wind, the allowable transmission capacity of the transmission line has a large difference, the traditional line capacity increasing technology includes improving the structure and materials of the transmission line, such as using a large-section transmission line, using a heat-resistant transmission line, or using an extra-high voltage technology, a flexible alternating current transmission technology FACTS, a series compensation technology, a dynamic reactive compensation technology, a same-pole multi-circuit and compact transmission technology, a large-section heat-resistant lead wire, etc., but all considering improving the static transmission capacity of the transmission line (the real-time temperature of the transmission line is improved from specified 70 degrees to 80 degrees or 90 degrees so as to improve the current-carrying capacity of the lead wire), the transmission line needs to be rebuilt and expanded or expensive equipment needs to be added, how to adopt a new technology to improve the transmission capacity of the line on the existing line to the maximum extent, solve the bottleneck phenomenon of the transmission line, and relieve, has great social and economic significance.
disclosure of Invention
in order to solve the problems, the invention provides a dynamic capacity expansion system and method based on transmission line temperature measurement.
The dynamic capacity expansion system based on the temperature measurement of the power transmission line comprises a data monitoring device, a data acquisition device and a terminal processing device;
the data monitoring device comprises a first temperature sensor, a second temperature sensor, an inclination angle sensor and a wind speed sensor;
the first temperature sensor is in communication connection with the data acquisition device and is used for monitoring the real-time temperature of the power transmission line;
The second temperature sensor is in communication connection with the data acquisition device and is used for monitoring the real-time temperature of the surrounding environment of the power transmission line;
The inclination angle sensor is in communication connection with the data acquisition device and is used for monitoring the inclination angle of the power transmission line;
the wind speed sensor is in communication connection with the data acquisition device and is used for monitoring the real-time wind speed of the surrounding environment of the power transmission line;
The data acquisition device is in communication connection with the terminal processing device and is used for converting the real-time temperature of the power transmission line, the real-time temperature of the environment around the power transmission line, the inclination angle of the power transmission line and the real-time wind speed analog quantity signal of the environment into digital quantity signals and transmitting the digital quantity signals to the terminal processing device;
And the terminal processing device is used for predicting the transmission capacity allowance of the transmission line in a certain period of time in the future according to the digital quantity signal.
preferably, the terminal processing device includes a first calculating module, a second calculating module and a pre-estimating module, wherein:
the first calculation module is used for calculating the transmission capacity of the current transmission line according to the real-time temperature of the transmission line and the real-time temperature of the surrounding environment of the transmission line;
The second calculation module is used for calculating to obtain the transmission capacity allowance of the current transmission line according to the transmission capacity of the current transmission line and the transmission line inclination angle;
The estimation module is used for estimating the transmission capacity allowance of the transmission line in a certain period of time in the future according to the transmission capacity allowance of the current transmission line and the real-time wind speed of the surrounding environment.
Preferably, still include energy supply device, energy supply device includes solar panel, battery and voltage conversion module, solar panel the battery with voltage conversion module electricity in proper order is connected, voltage conversion module with first temperature sensor the second temperature sensor tilt angle sensor with the wind speed sensor electricity is connected.
Preferably, the voltage conversion module is electrically connected with the data acquisition device.
Preferably, the system further comprises a wireless communication device, and the data acquisition device is in communication connection with the terminal processing device through the wireless communication device; wherein the content of the first and second substances,
The wireless communication device is any one or combination of 3G, 4G, GPRS, Zigbee and Beidou communication modules.
The dynamic capacity expansion system based on the power transmission line temperature measurement obtains the current power transmission capacity of the power transmission line through calculation based on the power transmission line temperature, calculates the current power transmission capacity allowance by taking the power transmission line sag as a boundary condition under the condition of obtaining the current power transmission capacity, corrects by utilizing the real-time wind speed of the surrounding environment of the power transmission line, estimates the recent power transmission capacity expansion allowance of the power transmission line, and realizes the dynamic capacity expansion of the power transmission line based on the power transmission capacity allowance of the power transmission line, so that the power transmission line is provided with sufficient load, and the operation efficiency of the power transmission line is improved.
The invention discloses a dynamic capacity expansion method based on transmission line temperature measurement, which comprises the following steps:
Acquiring the real-time temperature of the power transmission line through a first temperature sensor;
acquiring the real-time temperature of the surrounding environment of the power transmission line through a second temperature sensor;
acquiring the inclination angle of the power transmission line through an inclination angle sensor;
acquiring real-time wind speed of the surrounding environment of the power transmission line through a wind speed sensor;
acquiring the transmission capacity of the current transmission line based on the real-time temperature of the transmission line and the real-time temperature of the surrounding environment;
acquiring the transmission capacity allowance of the current transmission line based on the transmission capacity and the transmission line inclination angle;
and estimating the transmission capacity allowance in a certain period of time in the future based on the current transmission capacity allowance of the transmission line and the real-time wind speed of the surrounding environment.
the dynamic capacity expansion method based on the power transmission line temperature measurement firstly acquires the real-time temperature of the power transmission line, the real-time temperature of the surrounding environment of the power transmission line, the inclination angle of the power transmission line and the real-time wind speed of the surrounding environment, then predicts the transmission capacity allowance in a certain period of time in the future based on the real-time temperature of the power transmission line, the real-time temperature of the surrounding environment of the power transmission line, the inclination angle of the power transmission line and the real-time wind speed of the surrounding environment, and then.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
fig. 1 is a schematic structural diagram of a dynamic capacity expansion system based on transmission line temperature measurement according to an embodiment of the present invention;
Fig. 2 is a schematic structural arrangement diagram of a dynamic capacity expansion system based on transmission line temperature measurement according to an embodiment of the present invention;
Fig. 3 is a schematic flowchart of a dynamic capacity expansion method based on transmission line temperature measurement according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating an influence of real-time ambient temperature of the transmission line on a current-carrying capacity of a conductor;
Fig. 5 is a schematic diagram illustrating an influence of real-time wind speed of an environment around a power transmission line on a current-carrying capacity of a conductor.
In the figure, 1 is a first temperature sensor, 2 is a second temperature sensor, 3 is a tilt angle sensor, and 4 is a wind speed sensor.
Detailed Description
in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the dynamic capacity expansion system based on transmission line temperature measurement of the present invention includes a data monitoring device, a data acquisition device and a terminal processing device;
the data monitoring device comprises a first temperature sensor 1, a second temperature sensor 2, an inclination angle sensor 3 and a wind speed sensor 4;
the first temperature sensor 1 is in communication connection with the data acquisition device, and the first temperature sensor 1 is used for monitoring the real-time temperature of the power transmission line and transmitting the acquired real-time temperature value to the data acquisition device; referring to fig. 2, taking the power transmission line between two power transmission towers as an example, and taking the A, B, C three-phase power transmission line between two power transmission towers as an example, the power transmission line includes three first temperature sensors 1, and the three first temperature sensors 1 are respectively installed on a A, B, C three-phase power transmission line to monitor real-time temperatures of the three power transmission lines; if the direct current transmission line is adopted, only two first temperature sensors 1 are needed to be arranged, and the two first temperature sensors 1 are respectively arranged on the two positive and negative power transmission lines; if the power transmission line is provided with only one single-phase line and one zero line, only two first temperature sensors 1 are needed to be arranged, and the two first temperature sensors 1 are respectively arranged on the single-phase line and the zero line; in order to detect the highest temperature of the power transmission line, the first temperature sensor may be installed at a joint of the power transmission line, and the resistance value of the joint is generally greater than that of a line having the same length, so that the temperature of the power transmission joint is the highest.
The second temperature sensor 2 is in communication connection with the data acquisition device, and the second temperature sensor 2 is used for monitoring the real-time temperature of the surrounding environment of the power transmission line and transmitting the acquired real-time temperature value to the data acquisition device; one second temperature sensor 2 is arranged, and the second temperature sensor 2 is arranged on one of the transmission towers or one of the transmission lines;
The inclination angle sensor 3 is in communication connection with the data acquisition device, and the inclination angle sensor 3 is used for monitoring the inclination angle of the power transmission line and transmitting the acquired inclination angle value to the data acquisition device; in the embodiment, three tilt angle sensors 3 are arranged, the three tilt angle sensors 3 are respectively arranged on three power transmission lines, and the tilt angle sensors 3 detect the tilt angles of the power transmission lines at the installation positions of the tilt angle sensors, so that the sag of the power transmission lines is calculated;
the wind speed sensor 4 is in communication connection with the data acquisition device, and the wind speed sensor 4 is used for monitoring the real-time wind speed of the surrounding environment of the power transmission line and transmitting the acquired wind speed value to the data acquisition device; one wind speed sensor 4 is arranged, and the wind speed sensor 4 in the embodiment is installed on one of the transmission towers or one of the transmission lines;
The data acquisition device is in communication connection with the terminal processing device, can adopt a wired communication mode or a wireless communication mode, and is used for converting the real-time temperature of the power transmission line, the real-time temperature of the surrounding environment of the power transmission line and the dip angle analog quantity signal of the power transmission line into a digital quantity signal and transmitting the digital quantity signal to the terminal processing device; in this embodiment, the data acquisition device is mounted on one of the transmission towers;
the terminal processing device is used for obtaining the transmission capacity allowance of the transmission line according to the digital quantity signal analysis, and the terminal processing device is located in the control room.
The terminal processing device comprises a first calculation module, a second calculation module and an estimation module, wherein:
the first calculation module is used for calculating the transmission capacity of the current transmission line according to the real-time temperature of the transmission line and the real-time temperature of the surrounding environment of the transmission line;
the second calculation module is used for calculating to obtain the transmission capacity allowance of the current transmission line according to the transmission capacity of the current transmission line and the transmission line inclination angle;
the estimation module is used for estimating the transmission capacity allowance of the transmission line in a certain period of time in the future according to the transmission capacity allowance of the current transmission line and the real-time wind speed of the surrounding environment.
in this embodiment, the first temperature sensor 1, the second temperature sensor 2, the tilt sensor 3, and the wind speed sensor 4 are connected to a data acquisition device through a cable or an optical fiber, the data acquisition device is in communication connection with the terminal processing device through the wireless communication device, the wireless communication device is any one or a combination of 3G, 4G, GPRS, Zigbee, and beidou communication modules, but not limited to the above communication modules, and other communication modules may be applicable to the present invention; preferably, the wireless communication device simultaneously comprises a 3G, a 4G, a GPRS, a Zigbee and a Beidou communication module. In traditional public network communication module, the Beidou communication module is added, so that the condition that public network communication faults influence information transmission can be effectively avoided, and the reliability of an online monitoring system is improved.
in the embodiment, the solar energy power generation system further comprises an energy supply device, wherein the energy supply device is installed on a single power transmission tower and comprises a solar panel, a storage battery and a voltage conversion module, the solar panel, the storage battery and the voltage conversion module are sequentially and electrically connected, and the voltage conversion module is electrically connected with a first temperature sensor 1, a second temperature sensor 2, an inclination angle sensor 3 and a wind speed sensor 4; the solar panel converts solar energy into electric energy, the electric energy obtained by conversion is stored in the storage battery, and the voltage conversion module boosts and reduces the voltage output by the storage battery, so that power is supplied to the first temperature sensor 1, the second temperature sensor 2, the inclination angle sensor 3 and the wind speed sensor 4 respectively, and the dynamic capacity expansion system can work normally; the solar panel can be replaced by a wind driven generator which is arranged on a transmission tower and has higher wind speed in high altitude, so that the wind driven generator can convert enough electric energy into a storage battery; in addition, in the embodiment, the voltage conversion module is further connected with the wireless communication device to provide electric energy for the wireless communication device.
referring to fig. 3, the terminal processing device is configured to estimate the transmission capacity margin of the power transmission line for a certain period of time in the future according to the digital quantity signal, and specifically includes the following steps:
The first calculation module calculates the current transmission capacity of the transmission line according to the real-time temperature of the transmission line and the real-time temperature of the surrounding environment of the transmission line, and specifically comprises the following steps:
The temperature of the transmission line during operation is closely related to meteorological conditions such as real-time temperature of the surrounding environment of the transmission line, wind speed and the like besides the current-carrying capacity of the transmission line. After power transmission line material and geometric cross section are confirmed, when power transmission line and external environment reach temperature balance through the heat exchange, the temperature of power transmission line tends to be stable, has this moment:
Qc+Qr＝Qs+l2R(Tc)
Then
in the formula, I is the current of the current transmission line;
Tcfor transmission line real-time temperature, TcMeasured by the first temperature sensor 1;
QcIs the convection heat dissipation of the power transmission line and has the unit of W/m2；
QrIs the radiation heat dissipation of the power transmission line and has the unit of W/m2；
QsIs sunshine heat absorption with the unit of W/m2；
R(Tc) For transmission line real-time temperature TcThe unit of the alternating current resistance of the time transmission line is omega/m.
wherein the content of the first and second substances,
QC＝0.57θλfRe 0.485
in the formula, λfheat transfer coefficient, lambda, of air layer on the surface of the wiref＝2.42*10-2+7*(ta+0.5θ)*10-5，taThe real-time temperature of the surrounding environment of the power transmission line is shown, and theta is the average temperature rise of the surface of the power transmission line;
re is VD/V, V is the real-time wind speed of the surrounding environment of the power transmission line, and D is the outer diameter of the power transmission line;
v＝1.32*10-5+9.6*(ta+0.5θ)*10-8；
Re is Reynolds number.
Qr＝∈Aσ(TC4-ta 4)
Wherein the epsilon is the emissivity of the object;
a is the surface area of the object;
sigma is Stefan-Boltzmann constant, and its value is 5.67X 10-8W/(m2 K4)；
TcThe real-time temperature of the power transmission line is measured by a first temperature sensor 1;
tathe real-time temperature of the surrounding environment of the power transmission line is measured by the second temperature sensor 2.
Qs＝αsIsD
αsthe heat absorption coefficient of the power transmission line is 0.23-0.46 of the bright new line and 0.90-0.95 of the blackened old line;
IsThe sunshine intensity of sunlight on the power transmission line is 1kW/m2；
d is the outer diameter of the power transmission line.
based on the formula, the real-time temperature of the power transmission line measured by the first temperature sensor 1 and the real-time temperature of the surrounding environment of the power transmission line measured by the second temperature sensor 2 can be obtained through calculation, and the current carrying capacity of the power transmission line is obtained.
calculating the current maximum allowable ampacity of the power transmission line:
the factors considered in the calculation process of some countries in the world are different, so that the coefficients of the calculation formulas are different, but the calculation results are not very different, and the research is based on the Moger root formula and simplified into the Moger root formula
in the formula Itthe current maximum allowable current-carrying capacity of the power transmission line is obtained;
Theta is the current-carrying temperature rise of the power transmission line and the unit is;
v is the real-time wind speed of the surrounding environment of the power transmission line, the unit is m/s, and the wind speed is measured by a wind speed sensor 4;
d is the outer diameter of the transmission line and the unit is m;
the epsilon is the emissivity coefficient of the surface of the transmission line (the bright new line is 0.23-0.46, and the blackened old line is 0.90-0.95);
s is Stephen-Bautemann constant 5.67X 10-8W/m 2;
taThe real-time temperature of the surrounding environment of the power transmission line,The unit is ℃, measured by the second temperature sensor 2;
αsThe heat absorption coefficient of the power transmission line is 0.23-0.46 of the bright new line and 0.90-0.95 of the blackened old line; ktis t (t ═ θ + t)a) The ratio of the AC to DC resistance at DEG C;
Rdtthe resistance is the direct current resistance at t ℃, and can be obtained by referring to a related technical manual of a lead;
IsThe unit is the sunlight intensity of sunlight on the transmission line and is W/m2。
Therefore, the current maximum allowable ampacity is calculated based on the temperature of the power transmission line and the real-time temperature of the surrounding environment of the power transmission line.
after the ampacity formula is determined, the selected parameters have great influence on the calculation of the ampacity, and the collected calculation parameters related to the national ampacity are listed in table 1.
TABLE 1 Current-carrying Capacity calculation parameters of various countries
in the embodiment, the molar formula is utilized, and the real-time temperature of the surrounding environment of the power transmission line is tathe current carrying capacity was calculated using chinese and IEC conditions at 40 ℃, and the results are shown in table 2.
TABLE 2 Transmission Capacity calculated based on Mohr's root equation
As can be seen from table 2, calculating the flow of the power transmission line accurately according to the operating environment parameters of the actual power transmission line is another effective way to ensure the safety of the power grid and improve the transmission capacity of the power transmission line.
At a wind speed of 0.5m/s and a solar radiation intensity of 1000W/m2The influence of the real-time ambient temperature of the transmission line on the current-carrying capacity of the transmission line under the condition of (1) is shown in fig. 4.
as can be seen from the view of figure 4,
<1>At the wind speed of 0.5m/s and the sunlight intensityThe degree is 1000W/m2Under the condition (1), when the real-time temperature of the surrounding environment of the power transmission line is 40 ℃ and the temperature of the power transmission line is 70 ℃, the heat-balanced current-carrying capacity is 2400A;
<2>At a wind speed of 0.5m/s and a solar radiation intensity of 1000W/m2Under the condition, the real-time temperature of the environment around the power transmission line is lower than 30 ℃, and the heat balance current-carrying capacity of the power transmission line with the temperature of 70 ℃ can be improved from 2400A to 2800A.
The real-time temperature of the surrounding environment of the power transmission line is 40 ℃, and the sunshine intensity is 1000W/m2Under the condition (1), the influence of the real-time wind speed of the surrounding environment of the power transmission line on the current-carrying capacity of the power transmission line is shown in fig. 5.
As can be seen from FIG. 5, the real-time temperature of the surrounding environment of the transmission line is 40 ℃, and the sunshine intensity is 1000W/m2Under the condition of (1), the thermal balance current-carrying capacity can be improved from 2400A to 2800A when the wind speed is more than 1m/s and the temperature of the power transmission line is 70 ℃.
by analyzing each boundary condition (real-time temperature of the surrounding environment of the power transmission line, real-time wind speed of the surrounding environment of the power transmission line) which affects the current-carrying capacity of the power transmission line, it can be known that:
the real-time temperature of the surrounding environment of the power transmission line and the real-time wind speed of the surrounding environment of the power transmission line have large influence on the calculation of the current-carrying capacity of the power transmission line, the current-carrying capacity is increased by 40% when the environment wind speed v is 0.5m/s and the current-carrying capacity is increased by 15% -20% when the environment wind speed v is 1.0m/s and the current-carrying capacity v is 0.5 m/s.
temperature (including real-time temperature t of surrounding environment of power transmission lineaAnd the maximum allowable temperature theta of the power transmission line) have great influence on the current-carrying capacity: from the relationship between the temperature rise theta of the power transmission line and the current-carrying capacity, a certain temperature rise of the power transmission line can obtain larger current-carrying capacity rise at a lower temperature stage. After the temperature of the power transmission line rises, the value is reduced, and if the real-time temperature theta of the surrounding environment of the power transmission line is less than or equal to 40 ℃, the temperature rise of the power transmission line is increased by 5 ℃ every time, and the current-carrying capacity is increased by 10%; theta>when the temperature is 40 ℃, the increase of the current-carrying capacity is gradually reduced from 8% to 2% when the power transmission line is raised by 5 ℃.
Therefore, after the current-carrying capacity of the power transmission line is obtained through the temperature of the power transmission line, the current-carrying capacity of the power transmission line is corrected by using the real-time temperature of the surrounding environment of the power transmission line and the real-time wind speed of the surrounding environment of the power transmission line, which are obtained in real time, so that the current maximum allowable current-carrying capacity is obtained.
On transmission line's different positions, wind direction and wind speed change greatly, directly use the wind speed of a certain point of circuit to replace the effect to whole circuit, calculation error is very big, because the wind speed is different, and then transmission line real-time temperature is also different, therefore on other design, can set up more first temperature sensor 1 and wind speed sensor 4, realize more accurate transmission line temperature measurement and transmission line surrounding environment real-time wind speed measurement, and then obtain more accurate current maximum allowable current-carrying capacity.
transmission capacity of the transmission line:
For a direct current circuit:
for an ac circuit:
the second calculation module calculates to obtain the transmission capacity allowance of the current transmission line according to the transmission capacity of the current transmission line and the inclination angle of the transmission line, specifically;
according to the current maximum allowable ampacity ItAnd calculating the actual current-carrying capacity I of the current transmission line to obtain the current expandable current-carrying capacity:
△I＝It-I
The transmission capacity allowance of the current transmission line is as follows:
For a direct current circuit:
For an ac circuit:
In the formula, U is rated voltage of the power transmission line and has the unit of kV; delta P is the current transmission line transmissioncapacity allowance is kW;is the transmission power factor.
The estimation module estimates the transmission capacity allowance of the transmission line in a certain period of time in the future according to the current transmission capacity allowance of the transmission line and the real-time wind speed of the surrounding environment, wherein the certain period of time in the future can be one day, one week and one month, the transmission capacity allowance of the transmission line in the future one day, one week or one month is calculated according to actual needs, and then the transmission line is dynamically expanded based on the transmission capacity allowance of the transmission line in the future one day, one week or one month.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. a dynamic capacity expansion system based on power transmission line temperature measurement is characterized by comprising a data monitoring device, a data acquisition device and a terminal processing device;
the data monitoring device comprises a first temperature sensor (1), a second temperature sensor (2), an inclination angle sensor (3) and an air speed sensor (4);
the first temperature sensor (1) is in communication connection with the data acquisition device, and the first temperature sensor (1) is used for monitoring the real-time temperature of the power transmission line;
The second temperature sensor (2) is in communication connection with the data acquisition device, and the second temperature sensor (2) is used for monitoring the real-time temperature of the surrounding environment of the power transmission line;
the inclination angle sensor (3) is in communication connection with the data acquisition device, and the inclination angle sensor (3) is used for monitoring the inclination angle of the power transmission line;
The wind speed sensor (4) is in communication connection with the data acquisition device, and the wind speed sensor (4) is used for monitoring the real-time wind speed of the surrounding environment of the power transmission line;
The data acquisition device is in communication connection with the terminal processing device and is used for converting the real-time temperature of the power transmission line, the real-time temperature of the environment around the power transmission line, the inclination angle of the power transmission line and the real-time wind speed analog quantity signal of the environment into digital quantity signals and transmitting the digital quantity signals to the terminal processing device;
And the terminal processing device is used for predicting the transmission capacity allowance of the transmission line in a certain period of time in the future according to the digital quantity signal.
2. The dynamic capacity expansion system based on transmission line temperature measurement according to claim 1, wherein the terminal processing device comprises a first calculation module, a second calculation module and an estimation module, wherein:
The first calculation module is used for calculating the transmission capacity of the current transmission line according to the real-time temperature of the transmission line and the real-time temperature of the surrounding environment of the transmission line;
the second calculation module is used for calculating to obtain the transmission capacity allowance of the current transmission line according to the transmission capacity of the current transmission line and the transmission line inclination angle;
The estimation module is used for estimating the transmission capacity allowance of the transmission line in a certain period of time in the future according to the transmission capacity allowance of the current transmission line and the real-time wind speed of the surrounding environment.
3. the dynamic capacity expansion system based on power transmission line temperature measurement according to any one of claims 1-2, further comprising a power supply device, wherein the power supply device comprises a solar panel, a storage battery and a voltage conversion module, the solar panel, the storage battery and the voltage conversion module are electrically connected in sequence, and the voltage conversion module is electrically connected with the first temperature sensor (1), the second temperature sensor (2), the tilt sensor (3) and the wind speed sensor (4).
4. the dynamic capacity expansion system based on transmission line temperature measurement of claim 3, wherein the voltage conversion module is electrically connected with the data acquisition device.
5. the dynamic capacity expansion system based on power transmission line temperature measurement according to claim 1, further comprising a wireless communication device, wherein the data acquisition device is in communication connection with the terminal processing device through the wireless communication device; wherein the content of the first and second substances,
the wireless communication device is any one or combination of 3G, 4G, GPRS, Zigbee and Beidou communication modules.
6. a dynamic capacity expansion method based on transmission line temperature measurement is characterized by comprising the following steps:
Acquiring the real-time temperature of the power transmission line through a first temperature sensor (1);
acquiring the real-time temperature of the surrounding environment of the power transmission line through a second temperature sensor (2);
acquiring the inclination angle of the power transmission line through an inclination angle sensor (3);
Acquiring real-time wind speed of the surrounding environment of the power transmission line through a wind speed sensor (4);
Acquiring the transmission capacity of the current transmission line based on the real-time temperature of the transmission line and the real-time temperature of the surrounding environment;
Acquiring the transmission capacity allowance of the current transmission line based on the transmission capacity and the transmission line inclination angle;
and estimating the transmission capacity allowance in a certain period of time in the future based on the current transmission capacity allowance of the transmission line and the real-time wind speed of the surrounding environment.
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