Online wind speed measuring device and method for transmission line conductor

Abstract

The invention discloses an on-line wind speed measuring device and method for a power transmission line conductor, and belongs to the technical field of wind speed measurement, and the device comprises a cylindrical housing, a wind pressure assembly, and an environment pressure assembly. The cylindrical shell is arranged on a power transmission line wire in a sleeving manner, and the cylindrical shell and the power transmission line wire are coaxially arranged; the cylindrical shell is provided with two openings, and the two openings are symmetrically arranged in the horizontal radial direction of the cylindrical shell. The air pressure assembly is arranged on the cylindrical shell, the air pressure assembly at least comprises two air pressure sensors, and the two air pressure sensors correspond to the two openings in a one-to-one mode; the environment pressure assembly is arranged on the power transmission line wire and used for measuring the environment atmospheric pressure on the power transmission line wire. The problem that a traditional wind speed monitoring device is prone to failure in an icing environment can be effectively solved, accuracy and continuity of wind speed monitoring of the transmission line conductor are ensured, and important data support is provided for safe operation of a power grid.

Description

Technical Field

[0001] The present invention relates to the technical field of wind speed measurement, and in particular to an online wind speed measurement device and method for a transmission line conductor. Background Art

[0002] In the power system, the stable operation of transmission lines is crucial. However, the wind load generated by natural wind on the transmission line conductors and ground wires is an influencing factor that cannot be ignored. These wind loads may cause mechanical movements such as wind deviation and dancing in the conductors, which may in turn cause faults such as line short circuit tripping, seriously affecting the safe operation of the power grid. Especially in winter, when the surface of the conductor is covered with ice, the situation is more serious. Since the ice increases the windward area of ​​the conductor, the risk of wind deviation tripping is significantly increased. Therefore, micro-meteorological monitoring of the power grid, especially wind speed monitoring, has become an important requirement to ensure the safe and stable operation of the power grid.

[0003] In the prior art, wind speed measuring equipment is mostly used to monitor the wind speed of power transmission lines, such as ultrasonic velocimeters and rotating cups. However, in an icing environment, existing wind speed measuring equipment faces severe challenges. The sensor part of traditional wind speed measuring equipment is prone to ice formation under icing conditions, resulting in equipment failure and inability to accurately measure wind speed. This problem is particularly prominent in areas with severe icing, making wind speed measurement a difficult problem that has not yet been effectively solved.

[0004] Therefore, designing a wind speed monitoring device that can work stably in an icing environment is aimed at meeting the urgent needs of the power grid for wind speed monitoring of the ground wire of the transmission line in an icing environment, and providing reliable data support for the safe operation of the power grid is of great significance. Summary of the invention

[0005] In view of the problems existing in the above-mentioned prior art, the present invention provides an online wind speed measurement device and method for a transmission line conductor to solve the existing problems raised in the above-mentioned background technology. To achieve the above-mentioned purpose, the present invention provides the following technical solutions:

[0006] A transmission line conductor online wind speed measurement device comprises a cylindrical shell, a wind pressure component and an environmental pressure component; the cylindrical shell is sleeved on the transmission line conductor, and the cylindrical shell and the transmission line conductor are coaxially arranged; the cylindrical shell is provided with two openings, and the two openings are symmetrically arranged along the horizontal radial direction of the cylindrical shell; the wind pressure component is arranged on the cylindrical shell, and the wind pressure component comprises at least two wind pressure sensors, and the two wind pressure sensors correspond to the two openings one by one; the environmental pressure component is arranged on the transmission line conductor, and is used to measure the environmental atmospheric pressure on the transmission line conductor.

[0007] Furthermore, the environmental pressure component includes a cylindrical outer shell and an environmental pressure sensor disposed in the cylindrical outer shell; the cylindrical outer shell is disposed on one axial side of the cylindrical shell.

[0008] Furthermore, the diameters of the cylindrical outer shell and the cylindrical shell are the same.

[0009] Furthermore, the ratio of the diameter of the cylindrical shell to the diameter of the transmission line conductor is 2 to 3:1.

[0010] Furthermore, the wind pressure component also includes a control module and a communication module arranged inside the cylindrical shell, the control module is used to calculate the wind speed based on the measurement results of the wind pressure component and the ambient pressure component, and the communication module is used to wirelessly transmit the wind speed value.

[0011] Furthermore, it also includes a battery module, and the battery module is electrically connected to the control module and the communication module respectively.

[0012] Furthermore, the communication module is a LoRa wireless communication module.

[0013] A method for measuring the online wind speed of a transmission line conductor, using the above-mentioned online wind speed measuring device for a transmission line conductor, comprises the following steps:

[0014] Step 1: Measure the pressure P through the wind pressure sensor located on the leeward side of the transmission line conductor b ;

[0015] Step 2: Measure the current ambient pressure P through the ambient pressure component e ;

[0016] Step 3: Through pressure P b With the current environmental pressure P e Calculate the air pressure drop dP in the central area of ​​the cylindrical shell on the current leeward side;

[0017] Step 4: Calculate the wind speed V of the current transmission line conductor through the pressure drop value dP and the functional relationship between the air pressure and wind speed in the wake area.

[0018] The beneficial effects of the present invention are:

[0019] 1. The present invention discloses an online wind speed measuring device for a power transmission line conductor. Based on the physical law that the ice thickness of a cylinder decreases as the cylinder diameter increases, the device adopts an expanded cylindrical shell design with a diameter greater than the conductor diameter. By increasing the shell diameter, the ice thickness on the surface of the device is significantly reduced, effectively preventing sensor failure or device damage caused by severe icing, extending the service life of the monitoring device, and reducing maintenance costs.

[0020] 2. The present invention discloses an online wind speed measurement device and method for a power transmission line conductor. By designing a monitoring device based on the wind pressure on the lee side of an expanded cylinder, the invention cleverly utilizes the rule that ice on the power transmission line first forms unilateral airfoil ice on the windward side. Even under ice conditions, the current wind speed can be accurately calculated by measuring the wind pressure on the lee side without ice and based on the relationship between wind speed and wind pressure in the wake zone in the cylindrical turbulence theory. This method effectively solves the problem that traditional wind speed monitoring devices are prone to failure in an iced environment, ensures the accuracy and continuity of wind speed monitoring of power transmission line conductors, and provides important data support for the safe operation of the power grid.

[0021] 3. The online wind speed measurement device and method for transmission line conductors disclosed in the present invention are an important supplement and innovation to smart grid technology. By integrating advanced wind pressure sensing technology and data processing algorithms, intelligent monitoring and analysis of transmission line environmental parameters are realized, which provides strong technical support for the construction and development of smart grids and promotes the development of the power industry towards a more intelligent and efficient direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of an online wind speed measurement device for a transmission line conductor provided by an embodiment of the present invention;

[0023] Figure 2 is a simulation schematic diagram based on the cylindrical turbulence phenomenon provided by an embodiment of the present invention;

[0024] In the attached drawings: 1. cylindrical shell; 2. wind pressure sensor; 3. environmental pressure assembly; 31. cylindrical shell; 32. environmental pressure sensor; 4. transmission line conductor. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods, but the present invention is not limited to the following embodiments.

[0026] Unless otherwise specified, in the present invention, the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", "x direction", "y direction", "z direction", etc. indicating orientation or position relationship are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the orientation or position relationship in the present invention are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood in conjunction with the drawings and according to specific circumstances.

[0027] Embodiment 1:

[0028] See attached Figures 1-2 The present application discloses an online wind speed measuring device for a transmission line conductor, such as Figure 1 As shown, it includes a cylindrical shell 1, a wind pressure component and an environmental pressure component 3, wherein the cylindrical shell 1 is sleeved on the transmission line conductor 4, and the cylindrical shell 1 and the transmission line conductor 4 are coaxially arranged, which ensures that the measured wind speed is the wind speed at the position where the transmission line conductor 4 is located, and the accuracy of the wind pressure measurement can be ensured. Preferably, the diameter of the cylindrical shell 1 is larger than the diameter of the transmission line conductor 4. Openings are provided on both sides of the horizontal radial direction of the cylindrical shell 1, that is, the two openings are symmetrically arranged along the horizontal radial direction of the cylindrical shell 1. The wind pressure component includes two wind pressure sensors 2, which are respectively installed at the two openings of the cylindrical shell 1, and are used to measure the wind pressure on both sides of the transmission line conductor 4 in the horizontal radial direction. It can be understood that the transmission line conductor online wind speed measurement device of the present application only measures the wind speed in the horizontal direction of the transmission line conductor 4, and can better reflect the wind load conditions that affect the wind deviation of the transmission line conductor 4. The environmental pressure component 3 is arranged on the transmission line conductor 4, and is used to measure the ambient atmospheric pressure on the transmission line conductor 4.

[0029] Based on the physical phenomenon that the transmission line conductor 4 is first covered with ice to form a single-sided airfoil ice on the windward side, the setting of the wind pressure assembly can ensure that one of the two wind pressure sensors 2 arranged horizontally and radially along the transmission line conductor 4 is not covered with ice on the leeward side. During measurement, when the wind pressure sensor 2 on the windward side is covered with ice and frozen, the wind pressure sensor 2 on the leeward side can still work normally, and the current wind speed can be inferred from the wind pressure on the leeward side, thereby achieving the purpose of wind speed monitoring of the transmission line conductor in an ice-covered environment.

[0030] Embodiment 2:

[0031] See attached Figures 1-2On the basis of the first embodiment, in one embodiment of the present application, specifically, the ambient pressure assembly 3 includes a cylindrical housing 31 and an ambient pressure sensor 32. The cylindrical housing 31 may be a cylindrical anti-icing jacket. The ambient pressure sensor 32 is mounted on the cylindrical housing 31 and arranged axially along the power transmission line conductor 4. The cylindrical housing 31 may protect the ambient pressure sensor 32. The cylindrical housing 31 is arranged on one axial side of the cylindrical housing 1 to ensure the accuracy of ambient pressure measurement.

[0032] In one embodiment of the present application, specifically, the diameters of the cylindrical outer shell 31 and the cylindrical shell 1 are the same, which can effectively ensure the accuracy of the ambient pressure measurement in an ice-covered environment.

[0033] In one embodiment of the present application, specifically, the ratio of the diameter of the cylindrical shell 1 to the diameter of the power line conductor 4 is 2 to 3: 1. In the present application, the power line conductor online wind speed measurement device is designed with an expanded cylindrical shell having a diameter greater than the diameter of the power line conductor 4, based on the physical law of ice coating that the ice coating thickness of the cylinder decreases as the cylinder diameter increases, thereby effectively reducing the ice coating thickness on the surface of the device.

[0034] In one embodiment of the present application, specifically, the wind pressure assembly also includes a built-in control module and a communication module. The control module is responsible for processing the data of the wind pressure sensor 2 and the ambient pressure sensor 32 to calculate the wind speed; the communication module uses a LoRa wireless communication module to wirelessly transmit the wind speed data to a remote receiving end. It also includes a battery module, which is electrically connected to the control module and the communication module respectively to provide power to the control module and the communication module to ensure the continuous operation of the device.

[0035] Embodiment three:

[0036] See attached Figures 1-2 On the basis of the second embodiment, the present application further discloses a method for measuring the online wind speed of a transmission line conductor, which uses the online wind speed measuring device for the transmission line conductor in the above embodiment, and comprises the following steps:

[0037] Step 1: Measure the pressure P through the wind pressure sensor 2 located on the leeward side of the transmission line conductor 4 b ;

[0038] Step 2: Measure the current ambient pressure P through the ambient pressure component 3 e ;

[0039] Step 3: Through pressure P b With the current environmental pressure P e Calculate the current pressure drop dP of the central area of ​​the cylindrical shell 1 on the leeward side;

[0040] Step 4: Calculate the current wind speed V of the power transmission line conductor 4 through the air pressure drop value dP according to the functional relationship between the air pressure and wind speed in the wake area.

[0041] like Figure 2 As shown in the figure, based on the cylindrical turbulence phenomenon, the air pressure in the wake area on the leeward side is lower than the ambient atmospheric pressure. Through the theoretical calculation relationship of the pressure in the wake area under different wind speeds, the wind speed can be inferred from the pressure in the wake area. During measurement, when ice begins to form, the wind pressure sensor 2 on the windward side can no longer change with the change of ambient pressure due to freezing; at the same time, the wind pressure sensor 2 on the leeward side will measure a pressure P that is less than the ambient atmospheric pressure. b ; Further with the current ambient pressure P measured by the ambient pressure component 3 e By comparison, we can know the current pressure drop value dP in the central area of ​​the leeward cylindrical shell 1, where dP = P e -P b Further, according to the functional relationship f between the air pressure and wind speed in the wake area in the cylindrical spoiler theory, it can be understood that this numerical relationship can be obtained through simulation, and then the current wind speed V=f(dP) can be calculated.

[0042] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An online wind speed measuring device for a power transmission line conductor, characterized in that: The invention comprises a cylindrical shell (1), a wind pressure component and an environmental pressure component (3); the cylindrical shell (1) is sleeved on a power transmission line conductor (4), and the cylindrical shell (1) and the power transmission line conductor (4) are coaxially arranged; the cylindrical shell (1) is provided with two openings, and the two openings are symmetrically arranged along the horizontal radial direction of the cylindrical shell (1); the wind pressure component is arranged on the cylindrical shell (1), and the wind pressure component comprises at least two wind pressure sensors (2), and the two wind pressure sensors (2) correspond to the two openings one by one; the environmental pressure component (3) is arranged on the power transmission line conductor (4) and is used to measure the environmental atmospheric pressure on the power transmission line conductor (4).

2. The online wind speed measuring device for a power transmission line conductor according to claim 1, characterized in that: The environmental pressure component (3) comprises a cylindrical outer shell (31) and an environmental pressure sensor (32) arranged in the cylindrical outer shell (31); the cylindrical outer shell (31) is arranged on one axial side of the cylindrical shell (1).

3. The online wind speed measuring device for a power transmission line conductor according to claim 2, characterized in that: The cylindrical outer shell (31) and the cylindrical housing (1) have the same diameter.

4. The online wind speed measuring device for a power transmission line conductor according to claim 1, characterized in that: The ratio of the diameter of the cylindrical shell (1) to the diameter of the power transmission line conductor (4) is 2 to 3:

1.

5. The online wind speed measuring device for a power transmission line conductor according to claim 1, characterized in that: The wind pressure component also includes a control module and a communication module arranged inside the cylindrical shell (1), the control module being used to calculate the wind speed based on the measurement results of the wind pressure component and the ambient pressure component (3), and the communication module being used to wirelessly transmit the wind speed value.

6. The online wind speed measuring device for a power transmission line conductor according to claim 5, characterized in that: It also includes a battery module, which is electrically connected to the control module and the communication module respectively.

7. The online wind speed measuring device for a power transmission line conductor according to claim 5, characterized in that: The communication module is a LoRa wireless communication module.

8. A method for measuring the online wind speed of a power transmission line conductor, using the online wind speed measuring device for a power transmission line conductor as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: Measure the pressure P using the wind pressure sensor (2) located on the leeward side of the transmission line conductor (4). b ; Step 2: Measure the current ambient pressure P through the ambient pressure component (3) e ; Step 3: Through pressure P b With the current environmental pressure P e Calculate the current pressure drop dP of the central area of ​​the cylindrical shell (1) on the leeward side; Step 4: Calculate the wind speed V of the current transmission line conductor (4) through the pressure drop value dP according to the functional relationship between the air pressure in the wake area and the wind speed.

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