Simulated wire icing density measuring device and system for monitoring icing type of power transmission line

Abstract

The invention discloses a simulated wire icing density measuring device and system for monitoring the icing type of a power transmission line, and the device comprises a simulated wire, a temperature monitoring unit, a distance monitoring unit, a weighing unit, a driving unit, and a data processing unit. According to the invention, a simulation wire with the same model as a measured line is adopted, then the simulation wire is installed in an area where the measured line is located, and the state of the measured wire is simulated; and then the simulation wire is driven to rotate, so that the icing is uniformly attached to the simulation wire to form the cylindrical icing, the icing volume calculation can be simplified, the accuracy of the icing volume calculation can be improved, the accuracy of the icing density calculation is improved, and the judgment accuracy of the icing type is improved.

Description

Technical Field

[0001] The present invention relates to the field of transmission line icing type monitoring, and in particular to a simulated conductor icing density measurement device and system for transmission line icing type monitoring. Background Art

[0002] Transmission line icing refers to the phenomenon of ice forming on the conductors under severe cold weather conditions. In low-temperature environments, transmission lines are often exposed to the atmosphere, and the normal operating temperature of the current is high, so the heat radiated from the surface of the conductor is not enough 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 ice on overhead transmission lines will cause a sharp increase in the volume and mass of the transmission wires, and the towers will bear unbalanced tension. At the same time, irregular deicing will also cause many problems such as wire dancing. In severe cases, it may even induce large-scale tower collapse, line breakage, flashover, tripping and other serious power safety accidents. Therefore, the monitoring of transmission line icing has become an important requirement to ensure the safe and stable operation of the power grid.

[0004] Existing monitoring technologies include imaging method, weighing method, inclination sag method and capacitive sensor method. Most of these monitoring technologies are aimed at studying rime and ice layers and cannot accurately monitor the type of ice. However, the structure and properties of ice with different densities are quite different. It is necessary to monitor ice of different densities and optimize the existing ice protection strategies, which makes monitoring difficult.

[0005] Therefore, in the face of the urgent need of the power grid to monitor the ice density of transmission lines in an icing environment, designing an ice density monitoring device and system that can work stably in an icing environment is a technical problem that needs to be solved urgently. Summary of the invention

[0006] The purpose of the present invention is to provide a simulated conductor ice density measurement device and system for monitoring the ice type of transmission lines, so as to solve the problem of monitoring the ice density of transmission lines in the current ice-covered environment.

[0007] In order to solve the above technical problems, in a first aspect, the present invention provides a simulated conductor ice density measurement device for monitoring the type of ice coating on a transmission line, comprising:

[0008] Simulation wire: the simulation wire is a round wire of the same model as the line under test. The simulation wire is installed in the area where the monitored line is located to simulate the state of the line under test.

[0009] Temperature monitoring unit: 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 simulated wire and is arranged facing the simulated wire;

[0011] A driving unit, the driving unit is used to drive the simulated wire to rotate when the ambient temperature is lower than a preset threshold value, so that the model wire forms a circular column of ice in an ice-covered environment;

[0012] A weighing unit is installed below the simulated wire and the driving unit to measure the weight of the driving unit, the simulated wire and the ice.

[0013] A data processing unit, the data processing unit is connected to the temperature monitoring unit, the distance monitoring unit and the weighing unit respectively, and is used to obtain the data collected by the distance monitoring unit and the weighing unit when the ambient temperature is lower than a preset threshold, and then use an ice density calculation model to calculate the ice density ρ of the simulated wire according to the collected data;

[0014] The ice density calculation model is:

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

[0016] Where r is the radius of the simulated wire; L is the initial measurement value of the distance monitoring unit; ΔL is the real-time measurement value of the distance monitoring unit after ice covering; M is the weight of the simulated wire and the drive unit; M x is the total weight of the simulated wire, drive unit and ice after ice coating; d is the length of the ice-covered wire.

[0017] Furthermore, the state of the simulated wire installed in the area where the monitored line is located includes: the difference between the installation height of the simulated wire and the height of the monitored line is less than 50 cm, and the direction of the simulated wire and the monitored line remains parallel and is not blocked.

[0018] Furthermore, when the simulated wire is controlled to rotate by the driving unit, the rotation speed of the simulated wire is less than 30 revolutions per minute.

[0019] Furthermore, when the simulated wire is controlled to rotate by the driving unit, the rotation speed of the simulated wire is 5 revolutions per minute.

[0020] Further, after the data processing unit calculates the ice density ρ, the ice type is determined according to the ice density ρ, specifically including:

[0021] When 800kg / m 3 ≦ρ≦900kg / m 3 When , it is determined that the ice type of the ground wire of the transmission line within the span is rime;

[0022] When 300kg / m 3 ≦ρ≦600kg / m 3 When , it is determined that the ice type of the ground wire of the transmission line within the span is rime;

[0023] When 600kg / m 3 ≦ρ≦800kg / m 3 When , it is judged that the ice type of the ground wire of the transmission line within the span is mixed frost.

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

[0025] In the first aspect, the present invention also provides a simulated conductor ice density measurement system for monitoring the icing type of transmission lines, the system comprising 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 the present invention are as follows: by using a simulated wire of the same model as the measured line, and then installing the simulated wire in the area where the measured line is located, and simulating the state of the measured wire; and then driving the simulated wire to rotate so that ice is evenly attached to the simulated wire, forming cylindrical ice on the simulated wire, not only can the calculation of the ice volume be simplified, but also the calculation accuracy of the ice volume can be improved, thereby improving the calculation accuracy of the ice density, and further ensuring the improvement of the accuracy of the judgment of the ice type. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The same reference numerals are used in these drawings to represent the same or similar parts. The exemplary embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0028] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0029] Among them: 1. simulation wire; 2. drive unit; 3. weighing unit; 4. distance monitoring unit; 41. anti-icing cover; 42. bracket; 5. temperature monitoring unit; 6. data processing unit. DETAILED DESCRIPTION

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

[0031] The simulated conductor 1 is a circular conductor of the same model as the measured line (conductor or ground wire). When measuring the ice density, the simulated conductor 1 is installed in the area where the monitored line is located to simulate the state of the measured line; in order to ensure sufficient ice coverage, the simulated conductor 1 should not be blocked by the tower structure.

[0032] The temperature monitoring unit 5 is installed in the area where the monitored line is located, and is used to monitor the ambient temperature of the area where the line is located; 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, it starts to simulate the ice density measurement of the conductor 1;

[0033] The distance monitoring unit 4 is installed on one side of the simulated wire 1 and is arranged facing the simulated wire 1; the distance monitoring unit 4 is used to measure the distance between the distance monitoring unit 4 and the simulated wire 1 before ice coating and the distance between the distance monitoring unit 4 and the ice coating on the simulated wire 1 after ice coating;

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

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

[0036] The data processing unit 6 is connected to the temperature monitoring unit 5, the distance monitoring unit 4 and the weighing unit 3 respectively, and is 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, obtain the data collected by the distance monitoring unit 4 and the weighing unit 3, and then use the ice density calculation model to calculate the ice density ρ of the simulated wire 1 according to the collected data;

[0037] The ice density calculation model is:

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

[0039] Wherein, r is the radius of the simulated 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 ice covering; M is the sum of the weights of the simulated wire 1 and the driving unit 2; M x is the total weight of the simulated wire 1, the drive unit 2 and the ice after ice coating; d is the length of the ice-covered wire.

[0040] The beneficial effects of the present invention are as follows: by adopting a simulated conductor 1 of the same model as the measured line, and then installing the simulated conductor 1 in the area where the measured line is located, and simulating the state of the measured conductor; and then driving the simulated conductor 1 to rotate so that the ice is evenly attached to the simulated conductor 1, and by forming cylindrical ice on the simulated conductor 1, the calculation accuracy of the ice volume can be improved, thereby improving the calculation accuracy of the ice density, and then ensuring the improvement of the accuracy of the judgment of the ice type.

[0041] According to one embodiment of the present application, the state of the simulated wire installed in the area where the monitored line is located includes: the difference between the installation height of the simulated wire 1 and the height of the monitored line is less than 50 cm, and the direction of the simulated wire 1 and the monitored line remains parallel and is not blocked.

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

[0043] According to an embodiment of the present application, when the simulated wire 1 is controlled to rotate by the driving unit 2 , the rotation speed of the simulated wire 1 is 5 revolutions per minute.

[0044] According to an embodiment of the present application, after the data processing unit 6 calculates the ice density ρ, the ice type is determined according to the ice density ρ, specifically including:

[0045] When 800kg / m 3 ≦ρ≦900kg / m 3 When , it is determined that the ice type of the ground wire of the transmission line within the span is rime;

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

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

[0048] According to one embodiment of the present 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 simulated wire 1 through a bracket 42, and the measuring end of the distance monitoring unit 4 faces the simulated wire 1. An anti-icing cover 41 is provided on the outside of the distance monitoring unit 4.

[0049] In a second aspect, the present invention further provides a simulated conductor 1 ice density measurement system for monitoring the ice type of a transmission line, the system comprising 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 ice type to the remote terminal through a communication module. By sending the ice type to the remote terminal, remote monitoring can be achieved, so as to remotely obtain the ice condition.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A simulated conductor ice density measurement device for monitoring the type of ice coating on a transmission line, characterized in that: include A simulation wire, which is a round wire of the same model as the line under test, and is installed in the area where the monitored line is located to simulate the state of the line under test; A temperature monitoring unit, which is installed in the area where the monitored line is located and is used to monitor the ambient temperature; A distance monitoring unit, the distance monitoring unit is installed on one side of the simulated wire and is arranged facing the simulated wire; A driving unit, the driving unit is used to drive the simulated wire to rotate when the ambient temperature is lower than a preset threshold value, so that the model wire forms a circular column of ice in an ice-covered environment; A weighing unit, which is installed below the simulated wire and the driving unit and is used to measure the weight of the driving unit, the simulated wire and the ice; A data processing unit, the data processing unit is connected to the temperature monitoring unit, the distance monitoring unit and the weighing unit respectively, and is used to obtain the data collected by the distance monitoring unit and the weighing unit when the ambient temperature is lower than a preset threshold, and then calculate the ice density ρ of the simulated wire according to the collected data using an ice density calculation model; The ice density calculation model is: p=(M x -M) / ((π(L-ΔL) 2 -pr 2 )*d) Where r is the radius of the simulated wire; L is the initial measurement value of the distance monitoring unit; ΔL is the real-time measurement value of the distance monitoring unit after ice covering; M is the total weight of the simulated wire and the drive unit; M x is the total weight of the simulated wire, drive unit and ice after ice coating; d is the length of the ice-covered wire.

2. The simulated conductor ice density measuring device for monitoring the ice type of a transmission line according to claim 1 is characterized in that: The simulated wire is installed in the area where the monitored line is located to simulate the state of the measured line, including: the difference between the installation height of the simulated wire and the height of the monitored line is less than 50cm, and the simulated wire and the monitored line are kept parallel and not blocked.

3. The simulated conductor ice density measuring device for monitoring the ice type of transmission lines according to claim 1 is characterized in that: When the simulated wire is controlled to rotate by the driving unit, the rotation speed of the simulated wire is less than 30 revolutions per minute.

4. The simulated conductor ice density measuring device for monitoring the ice type of a transmission line according to claim 1 or 3, characterized in that: When the simulated wire is controlled to rotate by the driving unit, the rotation speed of the simulated wire is 5 revolutions per minute.

5. The simulated conductor ice density measuring device for monitoring the ice type of transmission lines according to claim 1 is characterized in that: After the data processing unit calculates the ice density ρ, the ice type is determined according to the ice density ρ, specifically including: When 800kg / m 3 ≦ρ≦900kg / m 3 When , it is determined that the ice type of the ground wire of the transmission line within the span is rime; When 300kg / m 3 ≦ρ≦600kg / m 3 When , it is determined that the ice type of the ground wire of the transmission line within the span is rime; When 600kg / m 3 ≦ρ≦800kg / m 3 When , it is judged that the ice type of the ground wire of the transmission line within the span is mixed frost.

6. The simulated conductor ice density measuring device for monitoring the ice type of a transmission line according to claim 1 is characterized in that: The distance monitoring unit is a laser distance sensor or an ultrasonic distance sensor.

7. A simulated conductor ice density measurement system for monitoring the type of icing on a transmission line, characterized in that: The system includes a remote terminal and a simulated conductor ice density measurement device as described in any one of claims 1 to 6; the remote terminal is communicatively connected to the data processing unit, and the data processing unit sends the obtained ice type to the remote terminal through a communication module.

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