阅读说明：本技术 一种用于监测舞动的监测终端单元 (Monitoring terminal unit for monitoring waving ) 是由 梁大磊 聂海涛 李锦林 于 2020-12-01 设计创作，主要内容包括：本公开提供了一种用于监测舞动的监测终端单元,涉及输电线路舞动监测技术领域,能够采集输电线路的舞动数据。监测终端单元包括：安装在假想档距上的N个监测终端,相邻监测终端具有间隙；一档输电线路具有M个假想档距,一档输电线路安装有MxN个监测终端,N≥2,M≥2；每个监测终端均安装有卫星天线和通讯模块,每个所述卫星天线实时接收卫星信号,每个所述通讯模块实时把卫星信号发送给监测平台。本公开根据舞动幅值进行输电线路的监测点分布,若干监测点的实时监测数据建立输电线路舞动的舞动模型,为后续进行舞动的分析、提供舞动阈值、及时处理舞动状态提供必要的基础数据。(The utility model provides a monitor terminal unit for monitoring waving relates to transmission line waving monitoring technology field, can gather transmission line's waving data. The monitoring terminal unit includes: n monitoring terminals are arranged on the virtual span, and gaps are formed between adjacent monitoring terminals; the first-gear power transmission line is provided with M imaginary span, MxN monitoring terminals are installed on the first-gear power transmission line, N is larger than or equal to 2, and M is larger than or equal to 2; each monitoring terminal is provided with a satellite antenna and a communication module, each satellite antenna receives satellite signals in real time, and each communication module sends the satellite signals to the monitoring platform in real time. Monitoring points of the power transmission line are distributed according to the galloping amplitude, real-time monitoring data of a plurality of monitoring points establish a galloping model of the power transmission line galloping, and necessary basic data are provided for subsequent galloping analysis, galloping threshold value providing and galloping state timely processing.)

1. A monitoring terminal unit for monitoring waving, comprising: n monitoring terminals are arranged on the virtual span, and gaps are formed between adjacent monitoring terminals;

the first-gear power transmission line is provided with M imaginary span, MxN monitoring terminals are installed on the first-gear power transmission line, N is larger than or equal to 2, and M is larger than or equal to 2;

each monitoring terminal is provided with a satellite antenna and a communication module, each satellite antenna receives satellite signals in real time, and each communication module sends the satellite signals to the monitoring platform in real time.

2. The monitor terminal unit according to claim 1, wherein each of said imaginary spans comprises at least one set of half wave numbers, the monitor terminal is mounted to a node having a waving amplitude of 0 in each set of half wave numbers, and the monitor terminal is mounted to a node having a largest waving amplitude in each set of half wave numbers.

3. The monitoring terminal unit according to claim 1, wherein one transmission line is divided into a plurality of grades, the one transmission line is provided with a plurality of towers, and a first grade transmission line is erected adjacent to the towers;

each transmission line is provided with a plurality of imaginary spans, and at least two monitoring terminals are installed on each imaginary span.

4. The monitor terminal unit of claim 3 wherein at least one imaginary span of a power transmission line comprises 1 half wave number, the imaginary span having at least one monitor terminal mounted at its center and at least one monitor terminal mounted at each end;

at least one monitoring terminal is also installed from the center of the virtual span to the middle of the end point.

5. The monitoring terminal unit of claim 3, wherein at least one imaginary span of a power transmission line comprises 2 half wave numbers, at least one monitoring terminal is installed at each of the center and both ends of the imaginary span, and at least one monitoring terminal is installed at each of 1/4 th and 3/4 th of the imaginary span.

6. The monitoring terminal unit of claim 3, wherein at least one imaginary span comprises 3 half wave numbers, at least one monitoring terminal is installed at 1/3 st, 2/3 st of the imaginary span, and at least one monitoring terminal is installed at 1/6 st, 1/2 st, 5/6 st of the imaginary span.

7. The monitoring terminal unit of claim 3, wherein at least one imaginary span in a power transmission line comprises 4 half wave numbers, and at least one monitoring terminal is installed at 1/4 st, 1/2 th and 3/4 th of the imaginary span.

8. The monitor terminal unit of claim 1 wherein the monitor terminal is in communication with a satellite, the monitor terminal transmitting data with the satellite for measuring in real time the distance of the monitor terminal between the installation point of the power transmission line and the satellite to obtain in real time the three-dimensional coordinates of the installation point.

9. The monitoring terminal unit of claim 8, wherein the monitoring terminal receives signals from 4 satellites simultaneously, and measures the distance between the installation point of the monitoring terminal on the power transmission line and the satellites in real time to obtain 4 distance data;

and eliminating the distance data with the largest error in the 4 distance data, and calculating the three-dimensional coordinates of the installation point by using the remaining 3 distance data.

Technical Field

The present disclosure relates to the field of transmission cable galloping, and in particular to a monitoring terminal unit for monitoring galloping.

Background

After the overhead power transmission cable is eccentrically coated with ice, a low-frequency and large-amplitude self-excited vibration phenomenon is generated under the excitation of wind. Generally speaking, when wind blows on a wire with a non-circular cross section due to ice coating, certain aerodynamic force is generated, so that the wire is induced to generate self-excited oscillation with low frequency (about 0.1-3 Hz) and large amplitude, and the self-excited oscillation is called dancing because the wire flies up and down in shape like dragon dance.

Aiming at the waving phenomenon, a great amount of scientific research is carried out at home and abroad, but the problem is still not thoroughly understood and solved, and the waving phenomenon is still a world problem at present.

At present, the waving phenomenon generates great hidden trouble to the transmission of electric power, which causes electric power loss. Therefore, how to scientifically and effectively solve the generation of the waving phenomenon is a very valuable research project.

Disclosure of Invention

The embodiment of the invention provides a monitoring terminal unit for monitoring galloping, which is used for distributing monitoring points of a power transmission line according to galloping amplitude values, establishing a galloping model of the power transmission line galloping by using real-time monitoring data of a plurality of monitoring points, and providing necessary basic data for the subsequent analysis of galloping, the provision of a galloping threshold value and the timely processing of a galloping state.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

the embodiment of the invention provides a monitoring terminal unit for monitoring waving, which comprises: n monitoring terminals are arranged on the virtual span, and gaps are formed between adjacent monitoring terminals;

the first-gear power transmission line is provided with M imaginary span, MxN monitoring terminals are installed on the first-gear power transmission line, N is larger than or equal to 2, and M is larger than or equal to 2;

each monitoring terminal is provided with a satellite antenna and a communication module, each satellite antenna receives satellite signals in real time, and each communication module sends the satellite signals to the monitoring platform in real time.

In some embodiments, each of said virtual steps comprises at least one set of half wave numbers, nodes having a waving amplitude of 0 in each set of half wave numbers are provided with monitoring terminals, and nodes having the largest waving amplitude in each set of half wave numbers are also provided with monitoring terminals.

In some embodiments, one transmission line is divided into a plurality of gears, the one transmission line is provided with a plurality of towers, and one gear of transmission line is erected adjacent to the towers;

each transmission line is provided with a plurality of imaginary spans, and at least two monitoring terminals are installed on each imaginary span.

In some embodiments, in a power transmission line, at least one virtual span comprises 1 half wave number, at least one monitoring terminal is installed in the center of the virtual span, and at least one monitoring terminal is installed at each of two ends of the virtual span;

at least one monitoring terminal is also installed from the center of the virtual span to the middle of the end point.

In some embodiments, at least one virtual span comprises 2 half wave numbers, at least one monitoring terminal is mounted at the center and at each end of the virtual span, and at least one monitoring terminal is mounted at 1/4 and 3/4 of the virtual span.

In some embodiments, at least one virtual span comprises 3 half wave numbers, at least one monitor terminal is mounted at 1/3 st and 2/3 st of the virtual span, and at least one monitor terminal is mounted at 1/6 st, 1/2 st and 5/6 st of the virtual span.

In some embodiments, at least one virtual span comprises 4 half wave numbers, and at least one monitoring terminal is installed at 1/4, 1/2 and 3/4 of the virtual span.

In some embodiments, the monitoring terminal is in communication with a satellite, and the monitoring terminal transmits data with the satellite, so as to measure the distance between the installation point of the monitoring terminal on the power transmission line and the satellite in real time, and obtain the three-dimensional coordinates of the installation point in real time.

In some embodiments, the monitoring terminal receives signals from 4 satellites at the same time, and measures the distance between the installation point of the monitoring terminal on the power transmission line and the satellites in real time to obtain 4 distance data;

and eliminating the distance data with the largest error in the 4 distance data, and calculating the three-dimensional coordinates of the installation point by using the remaining 3 distance data.

In the present disclosure, at least the following technical effects or advantages are provided:

according to the embodiment of the invention, monitoring points of the power transmission line are distributed according to the galloping amplitude, a galloping model of the power transmission line galloping is established by real-time monitoring data of a plurality of monitoring points, and necessary basic data are provided for the subsequent galloping analysis, the galloping threshold value providing and the galloping state processing.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments of the present invention or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a first schematic structural diagram of a monitoring terminal unit provided according to some embodiments of the present disclosure;

fig. 2 is a schematic diagram of a positional relationship between a transmission line and a tower according to some embodiments of the present disclosure;

fig. 3 is a schematic structural diagram of a monitoring terminal unit provided according to some embodiments of the present disclosure;

FIG. 4 is a schematic illustration of a hypothetical span comprising 1 half wave number provided in accordance with some embodiments of the present disclosure;

FIG. 5 is a schematic illustration of a hypothetical span comprising 2 half wavenumbers provided in accordance with some embodiments of the present disclosure;

FIG. 6 is a schematic illustration of a hypothetical step size comprising 3 half wavenumbers provided in accordance with some embodiments of the present disclosure;

FIG. 7 is a schematic illustration of a hypothetical span comprising 4 half wavenumbers provided in accordance with some embodiments of the present disclosure;

reference numerals: 100. an imaginary span; 200. a first-gear power transmission line; 300. a pole tower; 400. a transmission line; 500. and monitoring the terminal.

Detailed Description

The present disclosure is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present disclosure, and those skilled in the art should understand that the functional, methodological, or structural equivalents of these embodiments or substitutions may be included in the scope of the present disclosure.

The wire waving direction has up-and-down swinging, left-and-right swinging or oscillatory motion, so that accurate measurement of the waving wire under high-dynamic and multi-dimensional motion is a difficult point of wire waving monitoring.

After the overhead transmission line conducting wire is eccentrically coated with ice, a low-frequency and large-amplitude self-excited vibration phenomenon is generated under the excitation of wind. Generally speaking, when wind blows on a wire with a non-circular cross section due to ice coating, certain aerodynamic force is generated, so that the wire is induced to generate self-excited oscillation with low frequency (about 0.1-3 Hz) and large amplitude, and the self-excited oscillation is called dancing because the wire flies up and down in shape like dragon dance.

Aiming at the waving phenomenon, a great amount of scientific research is carried out at home and abroad, but the problem is still not thoroughly understood and solved, and the waving phenomenon is still a world problem at present. The waving phenomenon may cause a great hidden trouble to the transmission of electric power, resulting in electric power loss. In order to further understand the waving phenomenon, it is urgently needed to develop a monitoring terminal unit for monitoring waving.

There are many characteristic parameters affecting the galloping, but there are three main monitoring parameters, namely the galloping amplitude, the galloping frequency and the galloping half wave number of the power transmission line. In principle, the three parameters can be used to monitor the conductor waving, and provide necessary basic data for the subsequent waving analysis, the waving threshold value providing and the waving state processing in time.

However, the present invention monitors wire galloping using only transmission line galloping amplitude, the galloping frequency, and the transmission line galloping amplitude in the galloping half-wave number. Specifically, the monitoring terminal 500 is installed at the node where the waving amplitude of each group of half wave numbers is 0, and the monitoring terminal 500 is also installed at the node where the waving amplitude of each group of half wave numbers is the largest. It was observed that the hypothetical step size 100 in wire dancing occurred in half-wave numbers, typically l half-wave numbers, 2 half-wave numbers, 3 half-wave numbers, and 4 half-wave numbers. The 1 half-wave galloping is characterized in that the amplitude of the galloping in the center of the gear is maximum and gradually decreases towards the two ends; the 2 half-wave galloping is characterized in that the galloping amplitude of the center and two end points of the gear is zero, and the galloping amplitude of the gear 1/4 and the amplitude of the gear 3/4 are maximum; the 3 half-wave galloping is characterized in that the galloping amplitude value at 1/3 gear and 2/3 gear is zero, and the galloping amplitude value at 1/6 gear, 1/2 gear and 5/6 gear is maximum. The 4 half-wave galloping is characterized in that the galloping amplitude is zero at 1/4, 1/2 and 3/4.

Referring to fig. 1 and fig. 2, an embodiment of the present invention provides a monitoring terminal 500 unit for monitoring waving, including: n monitor terminals 500 installed on the virtual span 100, adjacent monitor terminals 500 having a gap; the first-gear power transmission line 200 is provided with M imaginary span 100, MxN monitoring terminals 500 are installed on the first-gear power transmission line 200, N is larger than or equal to 2, and M is larger than or equal to 2; each monitoring terminal 500 is provided with a satellite antenna and a communication module, each satellite antenna receives a satellite signal in real time, and each communication module transmits the satellite signal to a monitoring platform in real time.

A part of the monitoring terminal 500 of the embodiment of the present invention may adopt an inertial sensor, and another part may adopt a satellite three-dimensional positioning terminal. The inertial sensor is a wire galloping monitoring system based on the inertial sensor, and aims to avoid deviation of calculated relative displacement and actual movement caused by wire galloping torsion. The basic principle of the satellite three-dimensional positioning terminal is to measure the distance between a satellite and a user, perform space intersection according to the measured distance, and obtain the absolute coordinates of the user in the space.

Referring to fig. 3, in some embodiments, each virtual span 100 includes at least one set of half wave numbers, each set of half wave numbers having nodes with oscillation amplitude of 0 are equipped with monitoring terminals 500, and each set of half wave numbers having nodes with oscillation amplitude of maximum is also equipped with monitoring terminals 500.

Referring to fig. 1, 2 and 3, in some embodiments, one power transmission line 400 is divided into a plurality of stages, one power transmission line 400 is provided with a plurality of towers 300, and one power transmission line 200 is overhead by adjacent towers 300; each transmission line has a plurality of virtual spans 100, and at least two monitoring terminals 500 are installed on each virtual span 100.

In some embodiments, referring to fig. 4, in a power transmission line 400, at least one virtual span 100 includes 1 half-wave number, at least one monitoring terminal 500 is installed in the center of the virtual span 100, and at least one monitoring terminal 500 is installed at each end of the virtual span 100; at least one monitor terminal 500 is also installed from the center of the virtual span 100 to the middle of the end points.

In some embodiments, referring to fig. 5, in a power transmission line 400, at least one virtual span 100 comprises 2 half-waves, at least one monitoring terminal 500 is installed at each of the center and both ends of the span 100, and at least one monitoring terminal 500 is installed at each of the 1/4 th span and the 3/4 th span of the virtual span 100.

In some embodiments, referring to fig. 6, in a power transmission line 400, at least one virtual span 100 includes 3 half-waves, at least one monitoring terminal 500 is installed at 1/3 st, 2/3 st of the virtual span 100, and at least one monitoring terminal 500 is installed at 1/6 st, 1/2 st, 5/6 st of the virtual span 100.

In some embodiments, referring to fig. 7, in a power transmission line 400, at least one virtual span 100 includes 4 half-waves, and at least one monitoring terminal 500 is installed at each of the 1/4 th, 1/2 th and 3/4 th spans of the virtual span 100.

Referring to fig. 3, fig. 3 shows the installation location of the monitoring terminal 500 on the two-speed power transmission line. Fig. 3 is divided into a first-gear transmission line and a second-gear transmission line from left to right, and the first-gear transmission line is 4 half wave numbers, 3 half wave numbers and 1 half wave number from left to right. The second-gear power transmission line sequentially comprises 3 half wave numbers, 2 half wave numbers, 1 half wave number and 1 half wave number from left to right.

In the first-gear power transmission line, one monitoring terminal 500 is respectively installed at 1/4, 1/2 and 3/4 gears of 4 half wave numbers, one monitoring terminal 500 is respectively installed at 1/3, 2/3, 1/6, 1/2 and 5/6 gears of 3 half wave numbers, and one monitoring terminal 500 is respectively installed at the center and two ends of 1 half wave number gear. In the second-gear power transmission line, one monitoring terminal 500 is respectively installed at 1/3 gear, 2/3 gear, 1/6 gear, 1/2 gear and 5/6 gear of 3 half wave numbers, one monitoring terminal 500 is respectively installed at the center, two end points, 1/4 gear and 3/4 gear of 2 half wave numbers, one monitoring terminal 500 is respectively installed at the center and two ends of 1 half wave number gear, and one monitoring terminal 500 is respectively installed at the center, two ends and the middle part from the center to the end points of 1 half wave number gear.

As a second implementation manner, in the first-gear transmission line, two monitoring terminals 500 are respectively installed at 1/4, 1/2 and 3/4 gears of 4 half wave numbers, one monitoring terminal 500 is an inertial sensor, the other monitoring terminal 500 is a satellite three-dimensional positioning terminal, and the inertial sensor is installed in close proximity to the satellite three-dimensional positioning terminal; two monitoring terminals 500 are respectively installed at 1/3 th, 2/3 th, 1/6 th, 1/2 th and 5/6 th of 3 half wave numbers, one monitoring terminal 500 is an inertial sensor, the other monitoring terminal 500 is a satellite three-dimensional positioning terminal, and the inertial sensor is installed close to the satellite three-dimensional positioning terminal; two monitoring terminals 500 are respectively installed at the center and two ends of a gear with 1 half wave number, one monitoring terminal 500 is an inertial sensor, the other monitoring terminal 500 is a satellite three-dimensional positioning terminal, and the inertial sensor is installed close to the satellite three-dimensional positioning terminal. In the second-gear power transmission line, two monitoring terminals 500 are respectively installed at 1/3 gears, 2/3 gears, 1/6 gears, 1/2 gears and 5/6 gears of 3 half wave numbers, one monitoring terminal 500 is an inertial sensor, the other monitoring terminal 500 is a satellite three-dimensional positioning terminal, and the inertial sensor is installed close to the satellite three-dimensional positioning terminal; two monitoring terminals 500 are respectively installed at the center and two end points of gears of 2 half wave numbers, at the position of 1/4 gears and at the position of 3/4 gears, one monitoring terminal 500 is an inertial sensor, the other monitoring terminal 500 is a satellite three-dimensional positioning terminal, and the inertial sensor is installed next to the satellite three-dimensional positioning terminal; two monitoring terminals 500 are respectively installed at the center and two ends of a gear of 1 half wave number, one monitoring terminal 500 is an inertial sensor, the other monitoring terminal 500 is a satellite three-dimensional positioning terminal, the inertial sensor is installed in a manner of being close to the satellite three-dimensional positioning terminal, the two monitoring terminals 500 are respectively installed at the center, two ends and the middle part from the gear center to an end point of the gear of 1 half wave number, one monitoring terminal 500 is an inertial sensor, the other monitoring terminal 500 is a satellite three-dimensional positioning terminal, and the inertial sensor is installed in a manner of being close to the satellite three-dimensional positioning terminal.

Two monitoring terminals 500 are installed on the same installation point, and the waving data of the power transmission line is collected by using a satellite and an inertial sensor together.

In some embodiments, the monitoring terminal 500 communicates with a satellite, and the monitoring terminal 500 transmits data with the satellite, so as to measure the distance between the installation point of the monitoring terminal 500 on the power transmission line and the satellite in real time, so as to obtain the three-dimensional coordinates of the installation point in real time.

In some embodiments, the monitoring terminal 500 receives signals from 4 satellites at the same time, and measures the distance between the installation point of the monitoring terminal 500 on the power transmission line and the satellites in real time to obtain 4 distance data;

and eliminating the distance data with the largest error in the 4 distance data, and calculating the three-dimensional coordinates of the installation point by using the remaining 3 distance data.

The position of a satellite three-dimensional positioning terminal is determined in space, and the measurement values of three satellites are needed to give a three-dimensional position. The embodiment of the invention needs four satellites to determine the three-dimensional position of the satellite three-dimensional positioning terminal. Specifically, first, assuming that a satellite three-dimensional positioning terminal is measured to a first satellite at a distance of 38000km, the specific satellite projects all possible positions to be determined by the user onto a spherical surface with a radius of 38000km and centered on the satellite. Then, the distance from a satellite three-dimensional positioning terminal to a second satellite is measured to be 32000km, so that the second satellite projects all possible positions to be determined by a user to a second spherical surface which takes the second satellite as a center and takes 32000km as a radius, the intersecting lines of the two spherical surfaces form a circle, and the positions to be searched by the satellite three-dimensional positioning terminal are further concentrated on the two circles.

Then, the distance from a satellite three-dimensional positioning terminal to a third satellite is 30000km, the third satellite projects all possible positions to be determined by the user to a third spherical surface with the third satellite as the center and 30000km as the radius, the third spherical surface intersects with a circle formed by the intersection of the first spherical surface and the second spherical surface, and the possible positions of the satellite three-dimensional positioning terminal are changed into two points. To this end, ranging of three satellites is a problem. The intersection line of the first spherical surface and the second spherical surface in space is usually a circle, and the intersection of the two circles in the same plane is two points, if the centers of the two circles are two satellites for positioning, the intersection points of the two circles are exactly on the ground plane, and the two points generally fall into the southern hemisphere and the northern hemisphere. Because the earth is not a regular sphere, the target position to be measured is often not in the same sea level, and platform differences of sea, land and air space exist, so that the longitude and latitude and the elevation can be finally determined only by using three reference points (satellites). The method is characterized in that a target point position is determined in space, three-dimensional positions can be given only by measuring values of three satellites, a time variable parameter is also provided in the process of participating in position calculation, the distance measurement of the satellites is actually realized by time measurement, when the time error per second is millionth, the position error caused by the time measurement reaches more than 300m, a clock of a satellite navigation receiver used by people is realized by a quartz crystal oscillator, the positioning accuracy can be ensured only by using an atomic clock of the satellites as a synchronization standard, so that a fourth satellite is required to participate in positioning, and the fourth satellite is used as a time reference standard for application.

In the embodiment of the invention, a plurality of monitoring terminals 500 (5 or more) are arranged on a first-gear power transmission line 200, are uniformly arranged along a gear or are arranged according to a monitoring purpose, can perform two-way communication among the monitoring terminals 500, establish a good synchronization mechanism, and synchronously acquire and transmit data under the control of a data concentrator of the monitoring terminals 500 so as to ensure the synchronization of the acquisition time of each parameter.

In the embodiment of the invention, the mass density of the overhead line is uniform, the spatial distribution of the overhead line is a catenary, and the galloping of the cable can be roughly regarded as rigid motion under the condition that the expansion deformation of the cable is not obvious, namely the cable rotates around a straight line passing through two end points under the condition that the overall shape is not changed. Under the influence of wind, ice and snow and the like, one point on the cable presents an elliptical motion track.

The above-listed detailed description is merely a specific description of possible embodiments of the present disclosure, and is not intended to limit the scope of the disclosure, which is intended to include within its scope equivalent embodiments or modifications that do not depart from the technical spirit of the present disclosure.

It will be evident to those skilled in the art that the disclosure is not limited to the details of the foregoing illustrative embodiments, and that the present disclosure may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the disclosure being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.