Analog conductor icing density measuring device and system for transmission line icing type monitoring

Abstract

The application discloses a kind of for transmission line icing type monitoring simulation wire icing density measuring device and system, wherein, simulation wire icing density measuring device includes simulation wire, temperature monitoring unit, distance monitoring unit, weighing unit, driving unit and data processing unit;The application is by using the same model simulation wire with the line to be measured, then simulation wire is installed in the area where the line to be measured is located, and the state of the measured wire is simulated;Again, by driving simulation wire rotation, ice is uniformly attached on simulation wire, forming cylindrical ice, not only can simplify ice volume calculation, but also can improve the calculation accuracy of ice volume, to improve the calculation accuracy of ice density, to ensure to improve the accuracy of ice type determination.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of transmission line icing type monitoring, and in particular to a simulated conductor icing density measuring device and system for transmission line icing type monitoring. BACKGROUND

[0002] Transmission line icing refers to the phenomenon of ice formation on the conductor under cold weather conditions. In a low-temperature environment, the transmission line is often exposed to the atmosphere, and the normal operating temperature of the current is relatively high, so that the heat radiation on the surface of the conductor is insufficient to melt the ice attached to the conductor.

[0003] Transmission line icing is an important factor affecting the safe and stable operation of the power grid. The adhesion and growth of icing on overhead transmission lines can cause the volume and mass of the transmission conductor to increase dramatically, and the tower to bear unbalanced tension. At the same time, irregular ice shedding can also cause conductor galloping and other problems, and in severe cases, it can even induce large-scale tower collapse, wire breakage, flashover, and other serious power safety accidents. Therefore, monitoring of transmission line icing has become an important requirement for ensuring the safe and stable operation of the power grid.

[0004] Existing monitoring technologies include image method, weighing method, inclination sag method, and capacitive sensor method. These monitoring technologies are mostly aimed at studying rain icing ice layers and cannot accurately monitor the type of icing. However, icing structures and properties of different densities have significant differences, and it is necessary to monitor icing of different densities and optimize existing icing protection strategies, which is difficult to monitor.

[0005] Therefore, in the face of the urgent need for monitoring the icing density of transmission lines in icing environments, it is a technical problem to be solved to design an icing density monitoring device and system that can work stably in icing environments. SUMMARY

[0006] The purpose of the present application is to provide a simulated conductor icing density measuring device and system for transmission line icing type monitoring to solve the problem of monitoring the icing density of transmission lines in the current icing environment.

[0007] To solve the above technical problems, in a first aspect, the present application provides a simulated conductor icing density measuring device for transmission line icing type monitoring, comprising

[0008] The simulated conductor is a circular conductor of the same type as the measured line, and the simulated conductor is installed in the area where the monitored line is located to simulate the state of the measured line.

[0009] The temperature monitoring unit is installed in the area where the monitored line is located, and is used to monitor the ambient temperature.

[0010] A distance monitoring unit is installed on one side of the simulation conductor and faces the simulation conductor;

[0011] A driving unit is used to drive the simulation conductor to rotate when the ambient temperature is lower than the preset threshold, so that the simulation conductor forms a circular column ice in the icing environment;

[0012] A weighing unit is installed below the simulation conductor and the driving unit, and is used to measure the weight of the driving unit, the simulation conductor and the ice;

[0013] A data processing unit is connected with the temperature monitoring unit, the distance monitoring unit and the weighing unit, and is used to acquire the data collected by the distance monitoring unit and the weighing unit when the ambient temperature is lower than the preset threshold, and then calculate the ice density p of the simulation conductor according to the collected data by using an ice density calculation model;

[0014] The ice density calculation model is:

[0015] p=(M x -M) / ((π(L-ΔL) 2 -πr 2 )*d)

[0016] Wherein, r is the radius of the simulation conductor; L is the initial measurement value of the distance monitoring unit; ΔL is the real-time measurement value of the distance monitoring unit after icing; M is the weight sum of the simulation conductor and the driving unit; M x is the total weight of the simulation conductor, the driving unit and the ice after icing; and d is the length of the iced conductor.

[0017] Further, the installation of the simulation conductor in the area where the monitored line is located to simulate the state of the measured line includes that the difference between the installation height of the simulation conductor and the height of the monitored line is less than 50 cm, and the simulation conductor and the monitored line keep parallel and are not blocked.

[0018] Further, when the simulation conductor is controlled to rotate by the driving unit, the rotation speed of the simulation conductor is less than 30 revolutions per minute.

[0019] Further, when the simulation conductor is controlled to rotate by the driving unit, the rotation speed of the simulation conductor is 5 revolutions per minute.

[0020] Further, after the data processing unit calculates the ice density p, the ice type is judged according to the ice density p, which specifically includes:

[0021] When 800 kg / m 3 ≦p≦900 kg / m 3 , it is judged that the ice type of the transmission line conductor in the span is rain icing;

[0022] When 300 kg / m 3 ≦ρ≦600kg / m 3 If so, then the icing type of the transmission line conductors and ground wires within that span is determined to be rime.

[0023] When 600kg / m 3 ≦ρ≦800kg / m 3 If so, the icing type of the transmission line conductors and ground wires within that span is determined to be mixed frost.

[0024] Furthermore, the distance monitoring unit is a laser distance sensor or an ultrasonic distance sensor.

[0025] In a first aspect, the present invention also provides a simulated conductor ice density measurement system for monitoring the icing type of transmission lines. The system includes a remote terminal and the simulated conductor ice density measurement device provided in the first aspect. The remote terminal is communicatively connected to a data processing unit, and the data processing unit sends the obtained icing type to the remote terminal through a communication module.

[0026] The beneficial effects of this invention are as follows: by using a simulated conductor of the same type as the line under test, and then installing the simulated conductor in the area where the line under test is located, and simulating the state of the measured conductor; and by driving the simulated conductor to rotate so that the ice is evenly attached to the simulated conductor, forming a cylindrical ice layer on the simulated conductor, it is possible not only to simplify the calculation of the ice volume, but also to improve the accuracy of the calculation of the ice volume, thereby improving the accuracy of the calculation of the ice density, and thus ensuring the accuracy of the judgment of the ice type. Attached Figure Description

[0027] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, use the same reference numerals to denote the same or similar parts. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0028] Figure 1 This is a schematic diagram of a structure according to an embodiment of the present invention;

[0029] The components include: 1. Simulated conductor; 2. Drive unit; 3. Weighing unit; 4. Distance monitoring unit; 41. Anti-icing cover; 42. Support frame; 5. Temperature monitoring unit; and 6. Data processing unit. Detailed Implementation

[0030] In a first aspect, the present invention discloses a device for measuring the ice density of a simulated conductor 1 for monitoring the icing type of transmission lines, such as... Figure 1 As shown, the device includes a simulated conductor 1, a temperature monitoring unit 5, a distance monitoring unit 4, a weighing unit 3, a drive unit 2, and a data processing unit 6; each unit is described in detail below:

[0031] The simulation wire 1 is a circular wire with the same model as the measured wire (wire or ground wire), and when measuring the ice density, the simulation wire 1 is installed in the area where the monitored wire is located to simulate the state of the measured wire; in order to be fully iced, the simulation wire 1 should also be free from the tower structure.

[0032] The temperature monitoring unit 5 is installed in the area where the monitored wire is located to monitor the ambient temperature of the wire area; the temperature monitoring unit 5 sends the monitored temperature to the data processing unit 6 in real time, and only when the ambient temperature is lower than the preset threshold value, the ice density measurement of the simulation wire 1 begins;

[0033] The distance monitoring unit 4 is installed on one side of the simulation wire 1 and faces the simulation wire 1; the distance monitoring unit 4 is used to measure the distance between the distance monitoring unit 4 and the simulation wire 1 before icing and the distance between the distance monitoring unit 4 and the ice on the simulation wire 1 after icing;

[0034] The driving unit 2 is used to drive the simulation wire 1 to rotate around the shaft when the ambient temperature is lower than the preset threshold value, so that the simulation wire forms a circular column ice in the icing environment; by rotating the simulation wire 1 through the driving unit 2 (i.e. motor), the ice can be uniformly attached to the surface of the circular simulation wire 1, forming a cylindrical ice with the simulation wire 1, which can be beneficial to improve the accuracy of the ice volume measurement.

[0035] The weighing unit 3 is installed below the simulation wire 1 and the driving unit 2 to measure the weight of the driving unit 2, the simulation wire 1 and the ice;

[0036] The data processing unit 6 is connected with the temperature monitoring unit 5, the distance monitoring unit 4 and the weighing unit 3 respectively, used to obtain the temperature data monitored by the temperature monitoring unit 5 in real time, and when the ambient temperature is lower than the preset threshold value, the data collected by the distance monitoring unit 4 and the weighing unit 3 are obtained, and then the ice density calculation model is used to calculate the ice density p of the simulation wire 1 according to the collected data;

[0037] The ice density calculation model is:

[0038] p = (M x -M) / ((π(L-ΔL) 2 -πr 2 )*d)

[0039] Wherein, r is the radius of the simulation wire 1; L is the initial measurement value of the distance monitoring unit 4; ΔL is the real-time measurement value of the distance monitoring unit 4 after icing; M is the weight sum of the simulation wire 1 and the driving unit 2; M x is the total weight of the simulation wire 1, the driving unit 2 and the ice after icing; d is the length of the iced wire.

[0040] The application has the advantages that: the same type of analog conductor 1 as the measured line is used, and then the analog conductor 1 is installed in the area where the measured line is located to simulate the state of the measured line; the rotation of the analog conductor 1 is driven to make the ice uniformly adhere to the analog conductor 1, and the calculation accuracy of the ice volume is improved by forming a cylindrical ice on the analog conductor 1, so that the calculation accuracy of the ice density is improved, and the judgment accuracy of the ice type is further improved.

[0041] According to one embodiment of the application, the installation of the analog conductor in the area where the monitored line is located to simulate the state of the measured line includes that the difference between the installation height of the analog conductor 1 and the height of the monitored line is less than 50 cm, and the analog conductor 1 is parallel to the direction of the monitored line and is not blocked.

[0042] According to one embodiment of the application, when the rotation of the analog conductor 1 is controlled by the driving unit 2, the rotation speed of the analog conductor 1 is less than 30 revolutions per minute.

[0043] According to one embodiment of the application, when the rotation of the analog conductor 1 is controlled by the driving unit 2, the rotation speed of the analog conductor 1 is 5 revolutions per minute.

[0044] According to one embodiment of the application, after the data processing unit 6 calculates the ice density p, the ice type is judged according to the ice density p, and specifically includes:

[0045] When 800 kg / m 3 ≦ p ≦ 900 kg / m 3 , it is judged that the ice type of the transmission line ground wire in the span is glaze;

[0046] When 300 kg / m 3 ≦ p ≦ 600 kg / m 3 , it is judged that the ice type of the transmission line ground wire in the span is rime;

[0047] When 600 kg / m 3 ≦ p ≦ 800 kg / m 3 , it is judged that the ice type of the transmission line ground wire in the span is mixed rime.

[0048] According to one embodiment of the application, the distance monitoring unit 4 is a laser distance sensor or an ultrasonic distance sensor. The distance monitoring unit 4 is installed on the side of the analog conductor 1 through the support 42, and the measuring end of the distance monitoring unit 4 is opposite to the analog conductor 1, and an anti-icing cover 41 is arranged outside the distance monitoring unit 4.

[0049] In a second aspect, the present application further provides a simulated conductor 1 ice density measurement system for monitoring icing type of a power transmission line, which comprises a remote terminal and the simulated conductor 1 ice density measurement device provided in the first aspect; the remote terminal is in communication connection with a data processing unit 6, and the data processing unit 6 sends the obtained icing type to the remote terminal through a communication module. By sending the icing type to the remote terminal, remote monitoring can be realized to facilitate remote acquisition of the icing condition.

[0050] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the present application, and all of them should be covered in the scope of the claims of the present application.

Claims

1. A simulated conductor icing density measuring device for monitoring icing type of a power transmission line, characterized by, Comprising an analog conductor, which is a circular conductor of the same model as the measured conductor, the analog conductor being installed in the area where the monitored conductor is located to simulate the state of the measured conductor; a temperature monitoring unit, which is installed in the area where the monitored conductor is located to monitor the ambient temperature; a distance monitoring unit, which is installed on one side of the analog conductor and faces the analog conductor; a driving unit, which is used to drive the analog conductor to rotate when the ambient temperature is lower than a preset threshold, so that the model conductor forms a circular column ice in an icing environment; a weighing unit, which is installed below the analog conductor and the driving unit to measure the weight of the driving unit, the analog conductor and the ice; a data processing unit, which is connected with the temperature monitoring unit, the distance monitoring unit and the weighing unit respectively, and is used to acquire the data collected by the distance monitoring unit and the weighing unit when the ambient temperature is lower than the preset threshold, and then calculate the ice density ρ of the analog conductor according to the collected data by using an ice density calculation model; the ice density calculation model is: p=(M x -M) / ((π(L-ΔL) 2 -pr 2 )*d) Wherein, r is the radius of the simulation conductor; L is the initial measurement value of the distance monitoring unit; AL is the real-time measurement value of the distance monitoring unit after icing; M is the total weight of the simulation conductor and the driving unit; M x is the total weight of the simulation conductor, the driving unit and the ice after icing; d is the length of the iced conductor.

2. The simulated conductor icing density measurement device for monitoring the icing type of a power transmission line according to claim 1, characterized in that, the installation of the analog conductor in the area where the monitored conductor is located to simulate the state of the measured conductor includes that the difference between the installation height of the analog conductor and the height of the monitored conductor is less than 50 cm, and the analog conductor and the monitored conductor keep parallel and are not blocked.

3. The simulated conductor icing density measurement device for monitoring the icing type of a power transmission line according to claim 1, wherein, when the driving unit controls the rotation of the analog conductor, the rotation speed of the analog conductor is less than 30 revolutions per minute.

4. The analog conductor icing density measuring device for monitoring the icing type of a power transmission line according to claim 1 or 3, characterized in that, when the driving unit controls the rotation of the analog conductor, the rotation speed of the analog conductor is 5 revolutions per minute.

5. The simulated conductor icing density measurement device for monitoring the icing type of a power transmission line according to claim 1, wherein, after the data processing unit calculates the ice density ρ, the ice type is judged according to the ice density ρ, specifically including: When 800 kg / m 3 ≦ p ≦ 900 kg / m 3 , it is determined that the icing type of the ground wire in the span is glaze. When 300 kg / m 3 ≦ p ≦ 600 kg / m 3 , it is determined that the icing type of the ground wire in the span is rime. When 600 kg / m 3 ≦ p ≦ 800 kg / m 3 , then the ice type of the ground wire of the power transmission line in the span is determined as mixed rime.

6. The simulated conductor icing density measurement device for monitoring the icing type of a power transmission line according to claim 1, wherein, the distance monitoring unit is a laser distance sensor or an ultrasonic distance sensor.

7. A simulated conductor ice density measurement system for transmission line icing type monitoring, characterized by, The system comprises a remote terminal and the analog conductor ice density measurement device according to any one of claims 1-6; the remote terminal is in communication connection with the data processing unit, and the data processing unit sends the obtained ice type to the remote terminal through the communication module.

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