CN114264259A - Equivalent ice observation method and system - Google Patents
Equivalent ice observation method and system Download PDFInfo
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- CN114264259A CN114264259A CN202110362871.8A CN202110362871A CN114264259A CN 114264259 A CN114264259 A CN 114264259A CN 202110362871 A CN202110362871 A CN 202110362871A CN 114264259 A CN114264259 A CN 114264259A
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Abstract
The invention discloses an equivalent ice observation method and an equivalent ice observation system, wherein the method comprises the following steps: measuring by a microwave icing sensor arranged on a tower to obtain a first icing thickness; calculating the unit thickness equivalent to the reference type wire of the first icing thickness; and calculating to obtain the actual equivalent ice coating thickness according to the diameter of the actual wire to be measured and the unit thickness of the reference model wire. The invention can quickly obtain the icing thickness of the wires with different types, and greatly improves the accuracy of icing monitoring in the freezing environment.
Description
Technical Field
The invention relates to the technical field of icing detection of power transmission lines, in particular to an equivalent ice observation method and system.
Background
The ice coating phenomenon of the transmission line is quite common. The ice and snow cover of the transmission line can cause the mechanical and electrical properties of the transmission line to be rapidly reduced, and serious electric power accidents such as conductor galloping, tower inclination and even collapse, wire breakage, insulator flashover and the like are caused, so that the safe operation of an electric power system is seriously influenced. Freezing disasters around spring festival of China in 2008 cause large-scale and long-time power interruption, direct economic loss reaches more than 1500 hundred million yuan, and meanwhile, serious social influence is brought to industrial and agricultural production and people's life. Therefore, monitoring the icing condition of the power transmission line in real time and well performing deicing work become hot spots of current research.
Researchers have long observed and studied the icing of the power transmission line, and many achievements are made in the aspects of related technologies of icing theory, ice flash mechanism, power transmission line icing monitoring and research and the like. However, the problem that the icing of a camera cannot be continuously monitored by adopting a fixed image monitoring method generally at present exists, the tension method can only measure the icing in one tension end, and the manual observation method cannot measure the icing on a tower with the height of dozens of meters.
Disclosure of Invention
The invention provides an equivalent ice observation method and system, which are used for solving the technical problems that the ice coating monitoring of a power transmission line in the existing freezing environment cannot be continued or the accuracy is low.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
an equivalent ice observation method comprises the following steps:
measuring by a microwave icing sensor arranged on a tower to obtain a first icing thickness;
calculating the unit thickness equivalent to the reference type wire of the first icing thickness;
and calculating to obtain the actual equivalent ice coating thickness according to the diameter of the actual wire to be measured and the unit thickness of the reference model wire.
As a further improvement of the process of the invention:
the microwave icing sensor is arranged on the tower at the same height as the vertical point of the wire arc to be measured.
The reference model conductor is LGJ-240, and the unit thickness equivalent to the reference model conductor is calculated by the following formula:
where d2 is the unit thickness of LGJ-240, d1 is the first ice coating thickness, and R1 is the wire diameter of LGJ-240.
Calculating to obtain the actual equivalent ice coating thickness according to the diameter of the actual wire to be measured and the unit thickness of the reference model wire, wherein the calculation formula is as follows:
wherein d3 is the actual equivalent ice coating thickness, and R2 is the diameter of the actual lead to be measured.
The method further comprises the following steps: and transmitting the data of the actual equivalent ice coating thickness to a remote monitoring server and/or a monitoring mobile phone terminal in a wireless communication mode of 4g/5 g/Beidou.
The present invention also provides an equivalent ice viewing system comprising:
the microwave icing sensor is arranged on the tower and used for measuring to obtain a first icing thickness;
the control module is used for calculating the unit thickness equivalent to the reference type wire of the first icing thickness; and the device is also used for calculating the actual equivalent ice coating thickness according to the diameter of the actual wire to be measured and the unit thickness of the reference model wire.
As a further improvement of the system of the invention:
the system further comprises:
and the communication unit comprises any wireless communication mode of 4g/5 g/Beidou and transmits the data of the actual equivalent ice coating thickness to a remote monitoring server and/or a monitoring mobile phone terminal.
The microwave icing sensor is arranged on the tower at the same height as the vertical point of the wire arc to be measured.
A control module configured to calculate a unit thickness of the first ice coating thickness equivalent to a reference model wire using the following calculation:
where d2 is the unit thickness of LGJ-240, d1 is the first ice coating thickness, and R1 is the wire diameter of LGJ-240.
A control module configured to calculate the actual equivalent ice coating thickness using the following calculation:
wherein d3 is the actual equivalent ice coating thickness, and R2 is the diameter of the actual lead to be measured.
The invention has the following beneficial effects:
1. according to the equivalent ice observation method, the thickness measured by the microwave ice sensor is subjected to equivalent calculation with the reference type of lead, so that the ice coating thickness of the leads of different types can be quickly obtained, the method has guiding significance for monitoring and early warning of ice coating of power transmission and transformation equipment, and the accuracy of ice coating monitoring in a freezing environment is greatly improved.
2. According to the equivalent ice observation system, equivalent calculation is carried out on the thickness measured by the microwave ice measurement sensor and a reference model wire, the equivalent ice coating thickness is measured, quantized data are provided for operating personnel, the severity of ice coating and a subsequent coping strategy can be judged, and the whole process is efficient, accurate and safe.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic flow diagram of an equivalent ice observation method in accordance with a preferred embodiment of the present invention;
fig. 2 is a schematic view of an installation position of an equivalent ice viewing system of a preferred embodiment of the present invention.
The reference numerals in the figures denote:
1. the equivalent icing position of the tower; 2. a microwave icing sensor; 3. and (5) a lead to be tested.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
Referring to fig. 1, the method for effectively observing ice of the present invention comprises the following steps:
s1: and measuring by a microwave icing sensor 2 arranged on a tower to obtain the first icing thickness. In implementation, a microwave detection signal can be loaded and transmitted through a microwave transmitting antenna, the transmitted microwave detection signal is received through more than three microwave receiving antennas, the dielectric constant of a transmission medium is calculated through voltage signals of phase differences of the received microwave detection signal, whether the transmitted transmission medium is air, water or an ice layer is judged through calculation of the dielectric constant, whether ice is coated or rainfall is judged through phase change of the received microwave detection signal, and the ice thickness is calculated through transmission time difference of the microwave detection signal (the transmission speed of the microwave detection signal in ice is slower than that in air). Different ice coating thicknesses of the wires can be obtained quickly. The dielectric constant of the transmission medium may be calculated from the phase difference voltage signal of the received microwave detection signal, including: and the terminal opening waveguide is in direct contact with the surface of the substance to be measured for measurement, and then curve fitting calculation is carried out on the measured result to obtain an accurate numerical value. The curve fitting coefficient of the relative dielectric constant epsilon of the material is calculated when f is 3.975 GHz; the transmission medium transmitted by the judgment of the dielectric constant is air, water or an ice layer, and includes: a dielectric constant of 1 was judged as an air layer, a dielectric constant of 3 was judged as an ice layer, and a dielectric constant of 80 was judged as a water-dropping layer.
S2: calculating the unit thickness equivalent to the reference type wire of the first icing thickness;
s3: and calculating to obtain the actual equivalent ice coating thickness according to the diameter of the actual wire to be measured and the unit thickness of the reference model wire.
After the actual equivalent icing thickness is obtained, the data of the actual equivalent icing thickness can be sent to a remote monitoring server and/or a monitoring mobile phone terminal through a wireless communication mode of 4g/5 g/Beidou. In the steps, the thickness measured by the microwave icing sensor 2 is equivalently calculated with the reference type lead, so that the icing thicknesses of the leads of different types can be quickly obtained, the method has guiding significance for icing monitoring and early warning of the power transmission and transformation equipment, and the accuracy of icing monitoring in the freezing environment is greatly improved.
During implementation, the microwave ice coating sensor 2 is arranged at a position on the tower, which is equal to the vertical point position of the arc of the wire 3 to be measured. Namely, the equivalent icing position 1 of the pole tower in the figure 2 can ensure that the equivalent heights are consistent, and the measurement result is more accurate.
In this embodiment, the reference type conductor is LGJ-240, and the unit thickness equivalent to the reference type conductor is calculated by the following equation:
where d2 is the unit thickness of LGJ-240, d1 is the first ice coating thickness, and R1 is the wire diameter of LGJ-240 (aluminum conductor steel reinforced).
In this embodiment, the actual equivalent ice coating thickness is calculated according to the diameter of the actual wire to be measured and the unit thickness of the reference type wire, and the calculation formula is as follows:
wherein d3 is the actual equivalent ice coating thickness, and R2 is the diameter of the actual lead to be measured.
An embodiment of the present invention further provides an equivalent ice observing system, including: a microwave icing sensor 2 and a control module. The microwave icing sensor 2 is arranged on the tower and used for measuring to obtain a first icing thickness; the control module is used for calculating the unit thickness equivalent to the reference type wire of the first icing thickness; and the device is also used for calculating the actual equivalent ice coating thickness according to the diameter of the actual wire to be measured and the unit thickness of the reference model wire.
During implementation, the system can also be provided with a communication unit which sends the data of the actual equivalent ice coating thickness to a remote monitoring server and/or a monitoring mobile phone terminal in any wireless communication mode of 4g/5 g/Beidou.
In this embodiment, the microwave ice sensor 2 is disposed on the tower at a position equal to the vertical position of the arc of the wire 3 to be measured.
In practice, the control module is configured to calculate the unit thickness of the first ice coating thickness equivalent to the reference type conductor using the following calculation:
where d2 is the unit thickness of LGJ-240, d1 is the first ice coating thickness, and R1 is the wire diameter of LGJ-240.
In implementation, the control module is configured to calculate the actual equivalent ice coating thickness by using the following calculation formula:
wherein d3 is the actual equivalent ice coating thickness, and R2 is the diameter of the actual lead to be measured.
In conclusion, the equivalent ice observation method and the equivalent ice observation system provided by the invention have the advantages that equivalent calculation is carried out on the thickness measured by the microwave ice measurement sensor and a reference model wire, the equivalent ice coating thickness is measured, quantized data are provided for operators, the severity of ice coating and a subsequent coping strategy can be judged, and the whole process is efficient, accurate and safe.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An equivalent ice observation method is characterized by comprising the following steps:
measuring by a microwave icing sensor arranged on a tower to obtain a first icing thickness;
calculating the unit thickness of the first icing thickness equivalent to the reference type wire;
and calculating to obtain the actual equivalent ice coating thickness according to the diameter of the actual wire to be measured and the unit thickness of the reference type wire.
2. The equivalent ice observation method according to claim 1, wherein the microwave ice coating sensor is arranged on a tower at a height equal to the vertical position of the wire arc to be measured.
3. The equivalent ice viewing method of claim 2, wherein the reference type conductor is LGJ-240, and wherein said calculating the first ice coating thickness is equivalent to a unit thickness of the reference type conductor is calculated as follows:
where d2 is the unit thickness of LGJ-240, d1 is the first ice coating thickness, and R1 is the diameter of the wire of LGJ-240.
4. The equivalent ice observation method according to claim 3, wherein the actual equivalent ice coating thickness is calculated according to the diameter of the actual wire to be measured and the unit thickness of the reference type wire, and the calculation formula is as follows:
wherein d3 is the actual equivalent ice coating thickness, and R2 is the diameter of the actual lead to be measured.
5. The equivalent ice viewing method of claim 3, further comprising: and transmitting the data of the actual equivalent ice coating thickness to a remote monitoring server and/or a monitoring mobile phone terminal in a wireless communication mode of 4g/5 g/Beidou.
6. An equivalent ice observation system, comprising:
the microwave icing sensor is arranged on the tower and used for measuring to obtain a first icing thickness;
the control module is used for calculating the unit thickness of the first icing equivalent to the reference type wire; and the device is also used for calculating the actual equivalent ice coating thickness according to the diameter of the actual wire to be measured and the unit thickness of the reference type wire.
7. The equivalent ice viewing system of claim 6, further comprising:
and the communication unit comprises any wireless communication mode of 4g/5 g/Beidou and transmits the data of the actual equivalent ice coating thickness to a remote monitoring server and/or a monitoring mobile phone terminal.
8. The equivalent ice viewing system of claim 6, wherein the microwave ice coating sensor is disposed on a tower at a height equal to a vertical position of a wire arc to be measured.
9. The equivalent ice viewing system of claim 6 or 7, wherein the control module is configured to calculate the first ice coating thickness equivalent to a unit thickness of a reference type wire using the following calculation:
where d2 is the unit thickness of LGJ-240, d1 is the first ice coating thickness, and R1 is the diameter of the wire of LGJ-240.
10. The equivalent ice viewing system of claim 9, wherein the control module is configured to calculate the actual equivalent ice coating thickness using the following calculation:
wherein d3 is the actual equivalent ice coating thickness, and R2 is the diameter of the actual lead to be measured.
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