CN111521215B - On-line monitoring device for simulating wire icing based on micro-terrain microclimate area icing law - Google Patents

On-line monitoring device for simulating wire icing based on micro-terrain microclimate area icing law Download PDF

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CN111521215B
CN111521215B CN201911277807.9A CN201911277807A CN111521215B CN 111521215 B CN111521215 B CN 111521215B CN 201911277807 A CN201911277807 A CN 201911277807A CN 111521215 B CN111521215 B CN 111521215B
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microcontroller
icing
heating module
wire
force sensor
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CN111521215A (en
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李道武
李贤初
吴尧
胡建林
游亮
蒋兴良
曾林
刘杰
龚信举
于龙
陈启洪
陈泽帆
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Chongqing Transmission And Distribution Engineering Co ltd
Chongqing University
State Grid Corp of China SGCC
State Grid Chongqing Electric Power Co Ltd
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Chongqing Transmission And Distribution Engineering Co ltd
Chongqing University
State Grid Corp of China SGCC
State Grid Chongqing Electric Power Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G01D21/02—Measuring two or more variables by means not covered by a single other subclass
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G7/00—Overhead installations of electric lines or cables

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Abstract

The invention discloses an on-line monitoring device for simulating wire icing based on an icing rule of a micro-terrain microclimate area, which mainly comprises a simulation wire, a stepping motor, a motor fixing sleeve, a rolling belt shaft bearing, a sealing box I, a sealing box II, a three-dimensional force sensor I, a three-dimensional force sensor II, a stepping motor driver, a support and a microcontroller I. The device can monitor the icing thickness of the power transmission line in the same meteorological environment, has small volume and low power, and can be conveniently and rapidly arranged on a tower.

Description

On-line monitoring device for simulating wire icing based on micro-terrain microclimate area icing law
Technical Field
The invention relates to on-line monitoring of ice coating of a power transmission line, in particular to a device for on-line monitoring of ice coating of a simulation wire based on an ice coating rule of a micro-terrain microclimate area.
Background
The transmission line is a main part of electric energy transmission in a power grid, the normal operation of the line is an important guarantee for the safety of the power grid, and the ice coating accident of the line is a great problem in the safe operation of the power grid and is a serious natural disaster in a power system. Therefore, the monitoring of the line icing thickness becomes a key for solving the line icing problem, the more comprehensive the monitoring content is, the stronger the monitoring timeliness is, the more pertinent the relevant departments can be better guided to take anti-icing and deicing measures in advance, and the line icing accident is avoided. At present, the methods for monitoring the ice coating on the line mainly comprise: the method comprises the steps of obtaining related data through a sensor arranged on a line, and further calculating to obtain the thickness of the line icing, wherein the two methods are an inclination angle and stress-based line icing on-line monitoring method, a stress and lead sag-based icing monitoring method, an image method and a meteorological parameter prediction method, but the sensor is directly arranged on the line and is influenced by electromagnetic interference under the high voltage level, so that the error is large, and meanwhile, in winter, the sensor is influenced by low temperature, so that the temperature drift of the sensor is too large and even exceeds the working temperature range, or is frozen and cannot be used; the image method and the prediction method are characterized in that the image method and the prediction method perform comparative analysis on the images before and after line icing in an image processing mode to obtain data of icing thickness, but the image processing technical means are not mature, and the actual image is not obtained and is not applied, but the prediction method only constructs an icing meteorological parameter prediction model on the basis of historical icing data, and the prediction method belongs to a method for indirectly obtaining the line icing thickness, and errors are more obvious than those of other methods, so that the prediction method is only used for reference in practice and cannot be used as a monitoring means.
In summary, the existing online monitoring methods for ice coating on the power grid line all have certain problems, and cannot meet the requirements for monitoring the ice coating on the line in actual operation, so that a new online monitoring method for ice coating is needed to be provided.
Disclosure of Invention
The present invention is directed to solving the problems of the prior art.
The technical scheme adopted for achieving the purpose of the invention is that the on-line monitoring device for simulating the ice coating of the wire based on the ice coating rule of the micro-terrain microclimate area mainly comprises a simulation wire, a stepping motor, a motor fixing sleeve, a rolling belt shaft bearing, a sealing box I, a sealing box II, a three-dimensional force sensor I, a three-dimensional force sensor II, a support, a power supply, a microcontroller I, a microcontroller II, a temperature sensor I, a temperature sensor II, a heating module I, a stepping motor driver and a heating module II.
One end of the simulation lead is connected with a transmission shaft I of the stepping motor, and the other end of the simulation lead is connected with the head end of the rolling belt shaft bearing.
The simulation wire is a steel-cored aluminum strand. Alpha is the twisting coefficient of the steel-cored aluminum strand. G1、G2Is the torsional elastic modulus of the steel core and the aluminum stranded wire. J. the design is a square1、J2The torsional polar inertia distance of the steel core and the aluminum stranded wire is shown.
Further, the simulation lead is parallel to the monitored power transmission line. The type and the material of the analog lead are the same as those of the power transmission lead.
And the tail end of the transmission shaft II of the stepping motor is sleeved with a motor fixing sleeve.
The motor fixing sleeve is externally covered with a sealing box I.
And a three-dimensional force sensor I, a stepping motor driver and a microcontroller I are packaged in the sealing box I.
And a sealing box II is arranged at the tail end cover of the rolling belt shaft bearing.
And a three-dimensional force sensor II is packaged in the seal box II.
The support is respectively fixedly connected with the sealing box I and the sealing box II.
The support is fixed on a line tower for fixing the transmission line.
The three-dimensional force sensor I is attached to a transmission shaft II of the stepping motor and used for monitoring the tension of the transmission shaft II of the stepping motor. The three-dimensional force sensor I converts the pulling force of the transmission shaft II into a voltage signal I and sends the voltage signal I to an A/D conversion interface of the microcontroller I in a wireless mode.
The three-dimensional force sensor II is attached to the tail end of the rolling belt shaft bearing and used for monitoring the tension of the tail end of the rolling belt shaft bearing. The three-dimensional force sensor II converts the tension at the tail end of the belt shaft bearing into a voltage signal II and sends the voltage signal II to the microcontroller I in a wireless mode.
Further, the monitoring period of the three-dimensional force sensor I and the three-dimensional force sensor II is T.
And an I/O interface pin of the microcontroller I is connected with a signal wire of a stepping motor driver.
After the microcontroller I receives the voltage signal I and the voltage signal II, the icing thickness d of the simulation lead is obtained by processing, namely:
d＝(4M/πρl)0.5 (1)
wherein M is the icing mass. ρ is the standard rime ice coating density. l is the analog lead length.
The icing mass M is as follows:
Figure BDA0002313735070000031
in the formula (I), the compound is shown in the specification,
Figure BDA0002313735070000032
the conversion coefficient of the voltage and the stress of the three-dimensional force sensor is obtained. V1、V2The digital quantity is obtained by AD conversion of the output voltage of the three-dimensional force sensor I and the three-dimensional force sensor II.
When the icing thickness d is larger than the preset rotation thickness h, the microcontroller processes the icing thickness d of the simulation lead and calculates to obtain the maximum torsion angle theta of the midpoint of the simulation lead, namely:
Figure BDA0002313735070000033
in the formula, thetaxIn order to use the line tower as a zero point, the torsion angle of the wire is simulated according to the zero point distance x. M' is the ice layer moment on the unit length simulation lead wire under the condition that the simulation lead wire is evenly coated with ice. k is the simulated wire stiffness. x is the distance between the analog conductor and the zero point.
The ice layer moment M' of a unit length wire under the condition that the wire is evenly coated with ice is as follows:
Figure BDA0002313735070000034
in the formula, rho is the standard rime ice-coating density. D is the outer diameter of the simulation lead. And b is the thickness of the ice coating. g is the acceleration of gravity. r is the radius of the eccentric ice coating.
k＝α(G1J1+G2J2) (5)
In the formula, alpha is the twisting coefficient of the analog lead. G1、G2The torsional elastic modulus of the inner core and the outer stranded wire of the wire is simulated. J. the design is a square1、J2The torsional polar inertia distance of the inner core and the outer stranded wire of the wire is simulated.
Further, when the ice coating thickness d is larger than the maximum safe thickness dmaxAnd then, the microcontroller I sends alarm information to a remote monitoring system in a wireless mode.
The microcontroller converts the maximum torsion angle theta of the midpoint of the simulation wire into N pulses, sends the N pulses to the stepping motor driver, and drives the stepping motor to rotate through the stepping motor driver so as to drive the simulation wire to rotate by theta degrees.
The power supply supplies power to the microcontroller, the three-dimensional force sensor I and the three-dimensional force sensor II.
Further, the power supply is a solar panel.
Further, the support includes connecting rod and two parallel arrangement's that are connected perpendicularly with the connecting rod bracing piece, the connecting rod is connected with the shaft tower that is used for fixed transmission line, two bracing pieces are connected with seal box I and seal box II respectively.
The temperature sensor I and the heating module I are packaged in the sealing box I.
The temperature sensor I monitors the temperature t of the seal box I1And sent to the a/D conversion interface of the microcontroller I.
The heating module I is connected with an I/O interface signal line of the microcontroller I.
When the temperature t is received by the microcontroller I1＜TminAnd the microcontroller I is communicated with the heating module I to provide a pulse signal for the heating module I and control the heating module I to heat.
When the temperature t is received by the microcontroller I1＞TmaxWhen the heating module I is started, the microcontroller I is connected with the heating module I. T isminFor a predetermined operating temperature, T, of the heating modulemaxIs a preset heating module sleep temperature.
And the microcontroller II, the temperature sensor II and the heating module II are packaged in the sealing box II.
The temperature sensor II monitors the temperature t of the seal box II2And sent to microcontroller II.
And the heating module II is connected with an I/O interface signal line of the microcontroller II.
Further, the heating module I and the heating module II are resistance wires.
When the temperature t is received by the microcontroller II2＜TminAnd the microcontroller II is communicated with the heating module II to provide a pulse signal for the heating module II and control the heating module II to heat.
When the temperature t is received by the microcontroller II2＞TmaxAnd when the microcontroller II is disconnected with the heating module II.
The technical effect of the present invention is undoubted. The device is based on the simulation wire monitoring, and can monitor the icing thickness of the power transmission line in the same meteorological environment by considering various environments and problems faced by the actual power transmission line icing. Meanwhile, corresponding anti-icing and deicing measures are taken by the device, so that the practical application capacity of the device is greatly enhanced. The application of the three-dimensional force sensor can directly measure the change of the ice coating weight of the lead, and the error amplification caused by the data conversion of the sensor is avoided. The real-time data acquisition and transmission can realize the on-line monitoring of the ice coating of the line and improve the reliability of the ice coating monitoring of the power transmission line.
Drawings
Fig. 1 is a schematic structural diagram of an on-line monitoring device for simulating wire icing.
Fig. 2 is a flow chart of analog wire twisting control.
Fig. 3 is a schematic diagram of measurement and control of a simulated lead icing monitoring device.
In the figure: the device comprises a simulation lead 1, a stepping motor 2, a motor fixing sleeve 3, a rolling belt shaft bearing 4, a three-dimensional force sensor I51 and a three-dimensional force sensor II 52.
Detailed Description
The present invention is further illustrated by the following examples, but it should not be construed that the scope of the above-described subject matter is limited to the following examples. Various substitutions and alterations can be made without departing from the technical idea of the invention and the scope of the invention is covered by the present invention according to the common technical knowledge and the conventional means in the field.
Example 1:
referring to fig. 1 to 3, the on-line monitoring device for simulating the ice coating on the wire based on the ice coating rule of the micro-terrain microclimate area mainly comprises a simulation wire 1, a stepping motor 2, a motor fixing sleeve 3, a rolling belt shaft bearing 4, a sealing box I, a sealing box II, a three-dimensional force sensor I51, a stepping motor driver, a three-dimensional force sensor II52, a support, a power supply, a microcontroller I, a microcontroller II, a temperature sensor I, a temperature sensor II, a heating module I and a heating module II.
One end of the simulation lead 1 is connected with a transmission shaft I of the stepping motor 2, and the other end is connected with the head end of the rolling belt shaft bearing 4.
The simulation lead 1 is parallel to the monitored power transmission line. The type and the material of the analog lead 1 are the same as those of the power transmission lead.
The analog lead 1 is a steel-cored aluminum strand wire with the same diameter as the transmission line, and as shown in fig. 1, the analog lead 1 is equivalent to a hollow aluminum tube. When ice coating occurs on the simulation lead 1, the weight of the whole set of the device is changed.
The tail end of a transmission shaft II of the stepping motor 2 is sleeved with a motor fixing sleeve 3.
And a sealing box I is arranged outside the motor fixing sleeve 3.
And a three-dimensional force sensor I51, a stepping motor driver and a microcontroller I are packaged in the sealing box I.
And a sealing box II is arranged at the tail end cover of the rolling belt shaft bearing 4.
And a three-dimensional force sensor II52 is packaged in the seal box II.
The support is respectively fixedly connected with the sealing box I and the sealing box II.
The support is fixed on a line tower for fixing the transmission line.
The three-dimensional force sensor I51 is attached to a transmission shaft II of the stepping motor 2 and used for monitoring the tension of the transmission shaft II of the stepping motor 2. The three-dimensional force sensor I51 converts the tension of the transmission shaft II into a voltage signal I and sends the voltage signal I to the microcontroller I in a wireless mode.
The three-dimensional force sensor II52 is attached to the tail end of the rolling belt shaft bearing 4 and used for monitoring the tension of the tail end of the rolling belt shaft bearing 4. The three-dimensional force sensor II52 converts the tension at the tail end of the belt shaft bearing 4 into a voltage signal II and sends the voltage signal II to the microcontroller I in a wireless mode.
Further, the three-dimensional force sensor I51 and the three-dimensional force sensor II52 monitor the period T.
And an I/O interface pin of the microcontroller I is connected with a signal wire of a stepping motor driver.
After the microcontroller I receives the voltage signal I and the voltage signal II through the A/D channel, the icing thickness D of the analog lead 1 is obtained through processing, namely:
d＝(4M/πρl)0.5 (1)
wherein M is the icing mass. Rho is the standard rime ice-coating density, 0.9g/cm3. l is the analog lead 1 length.
The icing mass M is as follows:
Figure BDA0002313735070000061
in the formula (I), the compound is shown in the specification,
Figure BDA0002313735070000062
the conversion coefficient of the voltage and the stress of the three-dimensional force sensor is obtained. V1、V2The digital quantity is obtained by AD conversion of the output voltage of the three-dimensional force sensor I51 and the three-dimensional force sensor II 52.
Based on the rigidity characteristic of the power transmission line, the microcontroller processes the ice coating thickness d of the analog lead and calculates to obtain the maximum torsion angle theta of the midpoint of the analog lead, namely:
Figure BDA0002313735070000063
in the formula, thetaxIn order to use the line tower as a zero point, the torsion angle of the lead 1 is simulated according to the zero point distance x. M' is the ice layer moment on the unit length analog lead 1 under the condition that the analog lead 1 is evenly coated with ice. k is the analog wire 1 stiffness. x is the distance between the analog conductor 1 and the zero point.
The ice layer moment M' of a unit length wire under the condition that the wire is evenly coated with ice is as follows:
Figure BDA0002313735070000064
in the formula, rho is the standard rime ice-coating density. D is the outer diameter of the steel-cored aluminum strand. And b is the thickness of the ice coating. g is the acceleration of gravity. r is the radius of the eccentric ice coating.
k＝α(G1J1+G2J2) (5)
Wherein alpha is the twisting coefficient of the steel-cored aluminum strand. G1、G2Is the torsional elastic modulus of the steel core and the aluminum stranded wire. J. the design is a square1、J2The torsional polar inertia distance of the steel core and the aluminum stranded wire is shown.
When the thickness d of the ice coating is larger than the maximum safe thickness dmaxAnd then, the microcontroller I sends alarm information to a remote monitoring system in a wireless mode.
The microcontroller converts the maximum torsion angle theta of the midpoint of the simulation wire into N pulses, sends the N pulses to the stepping motor driver, and drives the stepping motor 2 to rotate through the stepping motor driver so as to drive the simulation wire 1 to rotate by theta degrees.
The power supply supplies power for the microcontroller, the three-dimensional force sensor I51 and the three-dimensional force sensor II 52.
The power supply is a solar panel.
The support comprises a connecting rod and two supporting rods which are vertically connected with the connecting rod and arranged in parallel, the connecting rod is connected with a tower for fixing the power transmission line, and the two supporting rods are respectively connected with a sealing box I and a sealing box II.
The temperature sensor I and the heating module I are packaged in the sealing box I.
The temperature sensor I monitors the temperature t of the seal box I1And sent to the microcontroller I.
The heating module I is connected with an I/O interface signal line of the microcontroller I.
When the temperature t is received by the microcontroller I1＜TminAnd the microcontroller I is communicated with the heating module I to provide a pulse signal for the heating module I and control the heating module I to heat.
When the temperature t is received by the microcontroller I1＞TmaxWhen the heating module I is started, the microcontroller I is connected with the heating module I. T isminFor a predetermined operating temperature, T, of the heating modulemaxIs a preset heating module sleep temperature.
And the microcontroller II, the temperature sensor II and the heating module II are packaged in the sealing box II.
The temperature sensor II monitors the temperature t of the seal box II2And sent to microcontroller II.
And the heating module II is connected with an I/O interface signal line of the microcontroller II.
Further, the heating module I and the heating module II are resistance wires.
When the temperature t is received by the microcontroller II2＜TminAnd the microcontroller II is communicated with the heating module II to provide a pulse signal for the heating module II and control the heating module II to heat. When the temperature t is received by the microcontroller II2＞TmaxAnd when the microcontroller II is disconnected with the heating module II.
Microcontroller I and microcontroller II are stm32 microcontrollers.
Example 2:
a simulation wire icing on-line monitoring device based on an icing rule of a micro-terrain microclimate area mainly comprises a simulation wire 1, a stepping motor 2, a motor fixing sleeve 3, a rolling belt shaft bearing 4, a sealing box I, a sealing box II, a three-dimensional force sensor I51, a three-dimensional force sensor II52, a stepping motor driver, a support, a power supply, a microcontroller I, a microcontroller II, a temperature sensor I, a temperature sensor II, a heating module I and a heating module II.
One end of the simulation lead 1 is connected with a transmission shaft I of the stepping motor 2, and the other end is connected with the head end of the rolling belt shaft bearing 4.
The tail end of a transmission shaft II of the stepping motor 2 is sleeved with a motor fixing sleeve 3.
And a sealing box I is arranged outside the motor fixing sleeve 3.
And a three-dimensional force sensor I51, a stepping motor driver and a microcontroller I are packaged in the sealing box I.
And a sealing box II is arranged at the tail end cover of the rolling belt shaft bearing 4.
And a three-dimensional force sensor II52 is packaged in the seal box II.
The support is respectively fixedly connected with the sealing box I and the sealing box II.
The support is fixed on a line tower for fixing the transmission line.
The three-dimensional force sensor I51 is attached to a transmission shaft II of the stepping motor 2 and used for monitoring the tension of the transmission shaft II of the stepping motor 2. The three-dimensional force sensor I51 converts the tension of the transmission shaft II into a voltage signal I and sends the voltage signal I to the microcontroller I in a wireless mode.
The three-dimensional force sensor II52 is attached to the tail end of the rolling belt shaft bearing 4 and used for monitoring the tension of the tail end of the rolling belt shaft bearing 4. The three-dimensional force sensor II52 converts the tension at the tail end of the belt shaft bearing 4 into a voltage signal II and sends the voltage signal II to the microcontroller I in a wireless mode.
And an I/O interface pin of the microcontroller I is connected with a signal wire of a stepping motor driver.
And after receiving the voltage signal I and the voltage signal II, the microcontroller I processes the voltage signal I and the voltage signal II to obtain the icing thickness d of the simulation lead 1.
And when the icing thickness d is larger than the preset rotation thickness h, the microcontroller processes the icing thickness d of the simulation lead and calculates to obtain the maximum torsion angle theta of the midpoint of the simulation lead. h is 10 mm.
The microcontroller converts the maximum torsion angle theta of the midpoint of the simulation wire into N pulses, sends the N pulses to the stepping motor driver, and drives the stepping motor 2 to rotate through the stepping motor driver so as to drive the simulation wire 1 to rotate by theta degrees.
Example 3:
the main structure of the on-line monitoring device for simulating the ice coating rule of the micro-terrain microclimate area is shown in the embodiment 2, wherein the monitoring device further comprises a microcontroller II, a temperature sensor I, a temperature sensor II, a heating module I and a heating module II.
The temperature sensor I and the heating module I are packaged in the sealing box I.
The temperature sensor I monitors the temperature t of the seal box I1And sent to the microcontroller I.
The heating module I is connected with an I/O interface signal line of the microcontroller I.
When the temperature t is received by the microcontroller I1＜TminAnd the microcontroller I is communicated with the heating module I to provide a pulse signal for the heating module I and control the heating module I to heat.
When the temperature t is received by the microcontroller I1＞TmaxWhen the heating module I is started, the microcontroller I is connected with the heating module I. T isminFor a predetermined operating temperature, T, of the heating modulemaxIs a preset heating module sleep temperature.
And the microcontroller II, the temperature sensor II and the heating module II are packaged in the sealing box II.
The temperature sensor II monitors the temperature t of the seal box II2And sent to microcontroller II.
And the heating module II is connected with an I/O interface signal line of the microcontroller II.
When the temperature t is received by the microcontroller II2＜TminWhen in use, the microcontroller II is communicated with the heating module II and is used for heating the moldThe block II provides a pulse signal to control the heating module II to heat.
When the temperature t is received by the microcontroller II2＞TmaxAnd when the microcontroller II is disconnected with the heating module II.
Example 4:
a method for using an on-line monitoring device for simulating wire icing mainly comprises the following steps:
1) and the simulation lead icing on-line monitoring device is connected with the tower through the bracket.
2) Every T period (15min), the three-dimensional force sensor I51 converts the tension of the transmission shaft II into a voltage signal I and sends the voltage signal I to the microcontroller I in a wireless mode, and the sensor II52 converts the tension of the tail end of the belt shaft bearing 4 into a voltage signal II and sends the voltage signal II to the microcontroller I in a wireless mode.
3) And after receiving the voltage signal I and the voltage signal II, the microcontroller I processes the voltage signal I and the voltage signal II to obtain the icing thickness d of the simulation lead 1. And (3) judging whether the icing thickness d of the microcontroller I is larger than the preset rotation thickness h, if so, entering the step 4), and if not, returning to the step 1).
4) Based on the rigidity characteristic of the power transmission line, the microcontroller processes the ice coating thickness d of the analog lead and calculates to obtain the maximum torsion angle theta of the midpoint of the analog lead.
The microcontroller converts the maximum torsion angle theta of the midpoint of the simulation wire into N pulses, sends the N pulses to the stepping motor driver, and drives the stepping motor 2 to rotate through the stepping motor driver so as to drive the simulation wire 1 to rotate by theta degrees.
5) When the thickness d of the ice coating is larger than the maximum safe thickness dmaxAnd then, the microcontroller I sends alarm information to a remote monitoring system in a wireless mode.
Example 5:
a method for using an on-line monitoring device for simulating wire icing is disclosed, wherein in the process of using the on-line monitoring device for simulating wire icing, a temperature sensor I and a temperature sensor II respectively monitor the temperature t of a seal box I1And temperature t of capsule II2。
If the temperature t received by the microcontroller I1＜TminIf the microcontroller I supplies power to the heating module I, the heating module I is controlled to heat the sealing box I until t1＞Tmax。
If the temperature t received by the microcontroller II2＜TminAnd the microcontroller II supplies power to the heating module II and controls the heating module II to heat the sealing box II until t2＞TmaxThe temperature drift detection device has the advantages that the sensor is guaranteed to work in a smaller proper temperature range all the time, errors caused by temperature drift are reduced, and meanwhile, the measurement and control device is guaranteed not to freeze at a low temperature.

Claims (10)

1. The on-line monitoring device for simulating the ice coating of the wire based on the ice coating law of the micro-terrain microclimate area is characterized by mainly comprising a simulation wire (1), a stepping motor (2), a motor fixing sleeve (3), a rolling tape shaft bearing (4), a sealing box I, a sealing box II, a three-dimensional force sensor I (51), a three-dimensional force sensor II (52), a support, a stepping motor driver and a microcontroller I;
one end of the simulation lead (1) is connected with a transmission shaft I of the stepping motor (2), and the other end of the simulation lead is connected with the head end of the rolling belt shaft bearing (4);
the tail end of a transmission shaft II of the stepping motor (2) is sleeved with a motor fixing sleeve (3);
a sealing box I is arranged outside the motor fixing sleeve (3);
a three-dimensional force sensor I (51), a stepping motor driver and a microcontroller I are packaged in the sealing box I;
a sealing box II is arranged at the tail end cover of the rolling belt shaft bearing (4);
a three-dimensional force sensor II (52) is sealed in the sealing box II;
the bracket is respectively fixedly connected with the sealing box I and the sealing box II;
the support is fixed on a line tower for fixing the transmission line;
the three-dimensional force sensor I (51) is attached to a transmission shaft II of the stepping motor (2) and used for monitoring the tension of the transmission shaft II of the stepping motor (2); the three-dimensional force sensor I (51) converts the tension of the transmission shaft II into a voltage signal I and sends the voltage signal I to the microcontroller I in a wireless mode;
the three-dimensional force sensor II (52) is attached to the tail end of the rolling belt shaft bearing (4) and used for monitoring the tension of the tail end of the rolling belt shaft bearing (4); the three-dimensional force sensor II (52) converts the tension at the tail end of the rolling belt shaft bearing (4) into a voltage signal II and sends the voltage signal II to the microcontroller I in a wireless mode;
an I/O interface pin of the microcontroller I is connected with a signal wire of a stepping motor driver;
after the microcontroller I receives the voltage signal I and the voltage signal II, the icing thickness d of the analog lead (1) is obtained through processing, namely:
d＝(4M/πρl)0.5 (1)
wherein M is the icing mass; rho is the standard rime ice-coating density; l is the length of the simulation lead (1);
the icing mass M is as follows:
Figure FDA0003257045100000011
in the formula (I), the compound is shown in the specification,
Figure FDA0003257045100000012
the conversion coefficient of the voltage and the stress of the three-dimensional force sensor is obtained; v1、V2The digital quantity is obtained by AD conversion of the output voltage of the three-dimensional force sensor I (51) and the three-dimensional force sensor II (52);
when the icing thickness d is larger than the preset rotation thickness h, the microcontroller I processes the icing thickness d of the analog lead, and calculates to obtain the maximum torsion angle theta of the midpoint of the analog lead, namely:
Figure FDA0003257045100000021
in the formula, thetaxThe torsion angle of the wire (1) is simulated at a distance x from a zero point by taking a line tower as the zero point; m' is the simulation of unit length under the condition of uniform ice coating of the simulation lead (1)The lead (1) is subjected to ice layer moment; k is the stiffness of the simulation lead (1); x is the distance between the analog lead (1) and the zero point;
the ice layer moment M' of a unit length wire under the condition that the wire is evenly coated with ice is as follows:
Figure FDA0003257045100000022
in the formula, rho is the standard rime ice-coating density; d is the outer diameter of the simulation lead (1); d is the thickness of the ice coating; g is the acceleration of gravity; r is the radius of the eccentric ice coating;
k＝α(G1J1+G2J2) (5)
in the formula, alpha is the twisting coefficient of the analog lead (1); g1、G2The torsional elastic modulus of the inner core and the outer stranded wire of the wire (1) is simulated; j. the design is a square1、J2The torsional polar inertia distance of an inner core and an outer stranded wire of the lead (1) is simulated;
the microcontroller I converts the maximum torsion angle theta of the middle point of the simulation lead into N pulses, sends the N pulses to the stepping motor driver, and drives the stepping motor (2) to rotate through the stepping motor driver so as to drive the simulation lead (1) to rotate by the angle theta.
2. The on-line monitoring device for simulating wire icing based on the icing law of the micro-terrain microclimate area according to claim 1, characterized in that: the simulation lead (1) is parallel to the monitored power transmission line; the type and the material of the analog lead (1) are the same as those of the power transmission lead.
3. The on-line monitoring device for simulating wire icing based on the icing law of the micro-terrain microclimate area according to claim 1, characterized in that: the three-dimensional force sensor system further comprises a power supply for supplying power to the microcontroller I, the three-dimensional force sensor I (51) and the three-dimensional force sensor II (52).
4. The on-line monitoring device for simulating wire icing based on the icing law of the micro-terrain microclimate area as claimed in claim 3, wherein: the power supply is a solar panel.
5. The on-line monitoring device for simulating wire icing based on the micro-terrain microclimate area icing law according to claim 1 or 2, characterized in that the support comprises a connecting rod and two parallel supporting rods perpendicularly connected with the connecting rod, the connecting rod is connected with a tower for fixing a power transmission line, and the two supporting rods are respectively connected with a sealing box I and a sealing box II.
6. The on-line monitoring device for simulating wire icing based on the icing law of the micro-terrain microclimate area according to claim 1 or 3, characterized in that: the heating device also comprises a microcontroller II, a temperature sensor I, a temperature sensor II, a heating module I and a heating module II;
the temperature sensor I and the heating module I are packaged in a sealing box I;
the temperature sensor I monitors the temperature t of the seal box I1And sending the data to the microcontroller I;
the heating module I is connected with an I/O interface signal line of the microcontroller I;
when the temperature t is received by the microcontroller I1<TminWhen the heating module I is used, the microcontroller I is communicated with the heating module I to provide a pulse signal for the heating module I and control the heating module I to heat;
when the temperature t is received by the microcontroller I1>TmaxWhen the heating module I is started, the microcontroller I is connected with the heating module I; t isminFor a predetermined operating temperature, T, of the heating modulemaxIs a preset heating module dormancy temperature;
the microcontroller II, the temperature sensor II and the heating module II are packaged in a sealing box II;
the temperature sensor II monitors the temperature t of the seal box II2And sending the data to a microcontroller II;
the heating module II is connected with an I/O interface signal line of the microcontroller II;
when the temperature t is received by the microcontroller II2<TminWhen the heating module II is in heating, the microcontroller II is communicated with the heating module II to provide a pulse signal for the heating module II and control the heating module II to heat;
when the temperature t is received by the microcontroller II2>TmaxAnd when the microcontroller II is disconnected with the heating module II.
7. The on-line monitoring device for simulating wire icing based on the icing law of the micro-terrain microclimate area as claimed in claim 6, wherein: and the heating module I and the heating module II are resistance wires.
8. The on-line monitoring device for simulating wire icing based on micro-terrain microclimate area icing law according to claim 1, wherein when icing thickness d is larger>Maximum safe thickness dmaxAnd then, the microcontroller I sends alarm information to a remote monitoring system in a wireless mode.
9. The on-line monitoring device for simulating wire icing based on the icing law of the micro-terrain microclimate area according to claim 1, characterized in that: the monitoring period of the three-dimensional force sensor I (51) and the three-dimensional force sensor II (52) is T.
10. The on-line monitoring device for simulating wire icing based on the icing law of the micro-terrain microclimate area according to claim 1, characterized in that: the simulation lead (1) is a steel-cored aluminum strand; alpha is the twisting coefficient of the steel-cored aluminum strand; g1、G2The torsional elasticity modulus of the steel core and the aluminum stranded wire; j. the design is a square1、J2The torsional polar inertia distance of the steel core and the aluminum stranded wire is shown.
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