CN210090238U - Transmission line icing monitoring system - Google Patents
Transmission line icing monitoring system Download PDFInfo
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- CN210090238U CN210090238U CN201920257961.9U CN201920257961U CN210090238U CN 210090238 U CN210090238 U CN 210090238U CN 201920257961 U CN201920257961 U CN 201920257961U CN 210090238 U CN210090238 U CN 210090238U
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- icing
- transmission line
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Abstract
The utility model discloses a transmission line icing monitoring system, including installing the icing density sensor on transmission line, icing density sensor includes monitoring unit and main control part, and main control part and monitoring unit are installed on transmission line, and the main control part passes through the wire and connects monitoring unit, main control part wireless communication connects icing state monitor, and icing state monitor fixes on transmission line tower, and icing state monitor passes through 4G network communication connection ground monitoring center. The utility model discloses a transmission line icing monitoring system has filled the vacancy in the aspect of the icing monitoring, for the on-line monitoring who realizes icing density provides probably and basis, provides the basis for intelligent deicing technique in the smart power grids construction.
Description
Technical Field
The utility model belongs to the technical field of the power transmission line icing monitoring, concretely relates to transmission line icing monitoring system.
Background
The ice/snow coating on the surface of the transmission line is a result caused by special weather, the transmission lines of the power system are more densely covered and distributed in various regions along with the high-speed development of the national power system, and the ice/snow coating of the transmission lines directly brings great harm and loss to the transmission network and influences the normal operation of the transmission network. Therefore, how to effectively perform icing monitoring, prevention and reliable deicing solution on the power transmission line is particularly important.
At present, the research on the icing of the power transmission line at home and abroad mainly aims at the theoretical research of an icing growth model and the online monitoring technology of the icing quality and thickness based on a mechanical sensor, however, the thickness and the quality of the icing are mostly calculated, the density of pure ice is mainly adopted for calculation, the real density of the icing on the power transmission line is ignored, so that a larger error is generated, the accurate calculation of the icing density is not facilitated, and therefore, a sensor which can be directly used for measuring the icing density of a lead needs to be designed to fill the vacancy in the aspect.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a transmission line icing monitoring system realizes wire icing density on-line monitoring, and the relative dielectric constant that can the accurate measurement icing calculates the density that obtains the icing, has realized transmission line icing monitoring and intelligent management.
The utility model provides a technical scheme be, a transmission line icing monitoring system, including installing the icing density sensor on transmission conductor, icing density sensor includes monitoring unit and main control part, and main control part and monitoring unit are installed on transmission conductor, and main control part passes through the wire and connects monitoring unit, and main control part wireless communication connects icing state monitor, and icing state monitor fixes on transmission tower, and icing state monitor passes through 4G network communication connection ground monitoring center.
The utility model is also characterized in that,
the monitoring unit comprises two circular electrode plates A and B made of aluminum, the outer wall of the electrode plate A is fixedly connected with an insulating ring, the outer wall of the insulating ring is provided with an equipotential ring, the electrode plate A and the electrode plate B both comprise two semicircular capacitor plates, one ends of the two capacitor plates are movably connected through a rotating shaft, the centers of the two capacitor plates are respectively provided with a semicircular groove with a concentric circle, a power transmission lead penetrates through the grooves, the other ends of the two capacitor plates are buckled, and the electrode plate A and the electrode plate B are sequentially arranged on the power transmission lead at intervals along the power transmission lead.
No equipotential ring is arranged on the electrode plate B.
The main control part comprises an insulating shell, a microprocessor is arranged in the insulating shell and connected with the monitoring unit through a wire, and the microprocessor is respectively connected with a temperature and humidity sensor, a data storage module, a power supply control module, an RTC timing module and a remote communication module;
the output end of the monitoring unit is connected with the input end of the sigma-delta capacitance digital converter, and the output end of the sigma-delta capacitance digital converter is connected with the microprocessor;
the input end of the power control module is respectively connected with the wire mutual inductance energy-taking module and the storage battery.
The temperature and humidity sensor is connected with the microprocessor through an RS232 level.
The output end of the lead mutual inductance energy-taking module is connected with the input end of the signal conditioning circuit, and the output end of the signal conditioning circuit is connected with the power supply control module.
The lead mutual inductance energy-obtaining module is an open-close type current transformer packaged by epoxy resin.
The wireless communication adopts a ZigBee mode.
The utility model has the advantages that the utility model discloses a transmission line icing monitoring system, the structure of icing sensor has been designed based on the corresponding relation of the relative dielectric constant of icing and icing density, constitute relative dielectric constant monitoring unit through two aluminium system open-close type plate electrodes, convenient dismantlement and installation to all be provided with the insulating ring on two polar plates on the monitoring unit, and set up equipotential ring on one of them, eliminated the error that edge effect and electrical insulation caused, increased the accuracy nature of monitoring; the microprocessor is set by reading the time of the RTC timing module, so that the icing density sensors are ensured to be consistent with the external time, each group of the icing density sensors acquire data according to the set sampling frequency, and the arithmetic mean value of the icing relative dielectric constant obtained by carrying out inverse operation is obtained, thereby effectively improving the accuracy of the icing density monitoring data; the power control module adopts the mutual inductance energy acquisition of the lead and the storage battery, and the storage battery is embedded into the sphere ice density sensor to supply power to the sphere ice density sensor, so that the power supply problem of the lead side sensor is solved.
Drawings
Fig. 1 is a schematic structural diagram of an ice coating monitoring system for a power transmission line according to the present invention;
fig. 2 is a schematic structural diagram of an ice density sensor in the ice monitoring system for the power transmission line of the present invention;
fig. 3 is a schematic structural diagram of a monitoring unit in an ice density sensor in an ice monitoring system for a power transmission line of the present invention;
fig. 4 is a schematic structural diagram of an electrode plate a in an ice density sensor in an ice monitoring system for a power transmission line of the present invention;
fig. 5 is a schematic structural diagram of a plate electrode B in an ice density sensor in an ice monitoring system for a power transmission line.
In the figure, 1, a microprocessor, 2, a monitoring unit, 3, a sigma-delta capacitance digital converter, 4, a temperature and humidity sensor, 5, an RS232 level, 6, a data storage module, 7, a remote communication module, 8, a lead mutual inductance energy obtaining module, 9, a signal conditioning circuit, 10, a power supply control module, 11, a storage battery, 12, an ice coating state monitor, 13, a rotating shaft, 14, a lead, 15, an aluminum plate, 16, an equipotential ring, 17, an insulating ring, 18, a plastic buckle, 19 and an RTC timing module are arranged.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model discloses a transmission line icing monitoring system, as shown in figure 1, a transmission line icing monitoring system, a serial communication port, including installing the icing density sensor on transmission conductor, icing density sensor includes monitoring unit 2 and main control unit, and main control unit and monitoring unit install on transmission conductor, and main control unit passes through the wire and connects monitoring unit, and main control unit wireless communication connects icing state monitor 12, and icing state monitor 12 fixes on transmission tower, and icing state monitor 12 passes through 4G network communication connection ground monitoring center.
The wireless communication adopts a ZigBee mode.
The main control part comprises an insulating shell, as shown in fig. 2, a microprocessor 1 is installed in the insulating shell, the microprocessor 1 is connected with a monitoring unit 2 through a lead, and the microprocessor 1 is respectively connected with a temperature and humidity sensor 4, a data storage module 6, a power control module 10, an RTC timing module 19 and a remote communication module 7;
the output end of the monitoring unit 2 is connected with the input end of the sigma-delta capacitance digital converter 3, and the output end of the sigma-delta capacitance digital converter 3 is connected with the microprocessor 1;
the input end of the power control module 10 is respectively connected with the lead mutual inductance energy-taking module 8 and the storage battery 11.
The temperature and humidity sensor 4 is connected with the microprocessor 1 through RS232 level.
The output end of the lead mutual inductance energy-taking module 8 is connected with the input end of the signal conditioning circuit 9, and the output end of the signal conditioning circuit 9 is connected with the power supply control module 10.
The lead mutual inductance energy-obtaining module 8 is an open-close type current transformer packaged by epoxy resin.
As shown in fig. 3, the monitoring unit 2 includes two circular electrode plates a and B, the electrode plates a and B each include two semicircular capacitor plates, one ends of the two capacitor plates are movably connected through a rotating shaft 13, the centers of the two capacitor plates are respectively provided with a semicircular groove of a concentric circle for being placed on the power transmission line, the other ends of the two capacitor plates are respectively provided with a plastic buckle 18, and the electrode plates a and B are fixed on the power transmission line through the plastic buckles 18.
The electrode plate A and the electrode plate B are both made of aluminum plates, and as shown in FIG. 4, the outer wall of the electrode plate A is fixedly connected with an insulating ring 17, and the outer wall of the insulating ring 17 is provided with an equipotential ring 16.
As shown in fig. 5, no equipotential ring 16 is provided on the electrode plate B.
The utility model discloses a transmission line icing monitoring system's theory of operation as follows: the model of a single chip microcomputer adopted by the microprocessor 1 is STM32F407, an aluminum electrode plate of the monitoring unit 2 is respectively connected to the microprocessor 1 through a sigma-delta Capacitance Digital Converter 3(Capacitance to Digital Converter, CDC), the microprocessor 1 measures the measured value of each sensor in real time, when the measured value of the icing relative dielectric constant monitoring unit 2 is increased, the signal of the temperature and humidity sensor 4 is connected to the microprocessor 1 through an RS232 level 5, the microprocessor 1 analyzes and proves that icing accumulation exists on the lead 14 by combining the output result of each sensor, and each data is stored in the data storage module 6, so that the real-time monitoring of the icing density of the lead is realized. Microprocessor 1 finally transmits the icing density monitoring value after the analysis to icing state monitor 12 through zigBee remote communication module 7, icing state monitor 12 is inside to include digital processing module, power control module, data storage module and communication module, data storage module stores the icing density data of receiving, then digital processing module handles the icing density data of storage, a set of most value data in each item of data is rejected and is sent to backstage monitoring center and carry out real-time icing density monitoring, power control module is the power supply of icing state monitor, communication module adopts 4G radio communication. The lead mutual inductance energy-obtaining module 8 is respectively connected to the power supply control module 10 through the signal conditioning circuit 9 and the storage battery 11 to supply power to the microprocessor 1.
The corresponding relation between the relative dielectric constant of the ice coating and the ice coating density is particularly important, and the ice coating density is shown in a formula 1:
in the formula, the ice coating is regarded as air (relative dielectric constant: ε)0) Is a background material in which ice particles (having a relative dielectric constant of:. epsilon.: are encapsulated1)，V1The volume ratio of pure ice in the ice coating is shown, and epsilon is the relative dielectric constant of the actual ice coating;
the ice coating is regarded as a mixture of two substances, namely pure ice and air, the ice coating is filled between capacitor plates, the capacitance value of the capacitor is measured (the size of the capacitor plates can be properly adjusted according to the thickness of the overhead conductor), and therefore, the relative dielectric constant of the ice coating can be obtained through a capacitance value calculation formula 2:
in the icing relative dielectric constant monitoring unit, because the insulating ring and the equipotential ring are arranged and installed, the error influence of the problems of edge effect, electric insulation and the like on the experiment is eliminated. For electrode plates (parallel plate capacitors), neglecting the fringe effect of the parallel plate capacitor, the relationship between the dielectric constant and the capacitance value of the capacitor can be expressed as:
c＝εrεair conditionerS/d (2)
In the formula: c is the capacitance of the capacitor, ∈rIs the dielectric constant of the medium,. epsilonAir conditionerDielectric constant of vacuum, 8.854 x 10-12F/m; s is the area unit of the polar plate m2D is the distance unit between two polar plates is m;
as shown in the formula 2, the capacitor has different capacitance values due to the different dielectric constants of the dielectrics between the plates, so that the relative dielectric constant of the dielectrics can be quantitatively calculated by measuring the capacitance value of the parallel plate capacitor, and the ice coating can be regarded as air (the relative dielectric constant is epsilon ∈ for the example of ice coating)0) Is a background material in which ice particles (having a relative dielectric constant of:. epsilon.: are encapsulated1) The calculation formula of the ice coating dielectric constant can be improved as follows:
in the formula, V1Epsilon is the relative dielectric constant of the actual ice coating, which is the volume fraction of pure ice in the ice coating.
The volume fraction calculation formula of pure ice in the ice coating can be obtained according to the formula 3:
in the formula 4, VIceThe volume ratio of ice in the ice coating is shown; the mass of air is negligibly smaller than that of pure ice under the same volume, and the content of air in the ice coating is opposite to the mass of the ice coatingThe amount has little or no effect and can be ignored, and the mass of the ice coating can be approximated to the mass of pure ice in the ice coating in the calculation of the density of the ice coating, and the volume is calculated according to the measured ice coating volume.
The monitoring unit 2 adopts two aluminum circular electrode plates to form an ice-coated relative dielectric constant measuring module, A, B electrode plates with the same size are fixed, antifouling flashover coatings are coated on the surfaces of two capacitor electrode plates and a groove, the open-close type ice-coated relative dielectric constant measuring module is adopted, inconvenience in mounting and dismounting is avoided, one of the two electrode plates is designed into a capacitor electrode plate A with an equal potential ring 16, an open-close type design is adopted between each group of electrode plates, the two semicircular capacitor electrode plates are connected through a rotating shaft 13 when the two electrode plates are opened, and the two semicircular capacitor electrode plates are combined into one and fastened through a rectangular plastic buckle 18 when the two electrode plates are fastened; the equipotential ring 16 and the aluminum plate are separated by an insulating plate 17 with the width of 2mm, so that errors caused by problems of edge effect, electrical insulation and the like to measurement are eliminated, and the electrical isolation of the two-part structure is ensured; wherein, the A plate is provided with an equipotential ring, and the B plate is not provided with an equipotential ring.
The mutual inductance of the wire can be obtained and the power control module of the storage battery is adopted, the mutual inductance of the wire can be obtained by adopting the electromagnetic induction principle, an open-close type mutual inductor is installed on a transmission wire and is connected to the power module through a signal conditioning circuit to be embedded inside the spherical ice density sensor, and the power supply of the whole ice density sensor is realized, so that the problem that the traditional mutual inductor is inconvenient to install and supply power on the side of the wire is solved.
The utility model discloses a transmission line icing monitoring system's operating method, concrete operation includes following step:
step 2, the microprocessor 1 firstly converts the capacitance value and the electrode plate size to obtain the relative dielectric constant of the ice coating according to the acquired capacitance value between the two electrode plates A and the electrode plate B in the monitoring unit 2, obtains the ice coating density through calculation, and then the microprocessor 1 further transmits the calculated ice coating density to the ice coating state monitor 12 through the ZigBee communication module 7 in real time;
and 3, storing the received data on site by the icing state monitor 12, grouping according to the determined data length, eliminating the maximum value and the minimum value in each group of data, sending the data to a ground monitoring center through 4G communication, and remotely monitoring the power transmission conductor by the ground monitoring center according to the obtained icing density on the power transmission conductor.
The utility model discloses a transmission line icing monitoring system has solved and can not accurately obtain icing density in the current method, has leaded to the problem that there is great error in icing monitoring on the transmission line, the utility model discloses an icing density sensor passes through the electric capacity plate structure of design, utilizes the accurate calculation of relative dielectric constant to obtain icing density, installs icing density sensor on the transmission line, gives icing state monitor with the icing density data transmission who obtains, icing state monitor carries out storage on the spot and handles measured data, sends to backstage monitoring center behind the a set of most value data among each item rejection data and carries out real-time icing density monitoring.
Claims (7)
1. The power transmission line icing monitoring system is characterized by comprising an icing density sensor arranged on a power transmission conductor, wherein the icing density sensor comprises a monitoring unit (2) and a main control part, the main control part and the monitoring unit are arranged on the power transmission conductor, the main control part is connected with the monitoring unit through a conductor, the main control part is in wireless communication connection with an icing state monitor (12), the icing state monitor (12) is fixed on a power transmission tower, and the icing state monitor (12) is in communication connection with a ground monitoring center through a 4G network;
monitoring unit (2) include circular shape plate electrode A and the plate electrode B of two aluminium system, plate electrode A's outer wall rigid coupling insulating ring (17), the outer wall of insulating ring (17) is provided with equipotential ring (16) such as, plate electrode A and plate electrode B all include two semicircular electric capacity boards, two electric capacity board one end is through pivot (13) swing joint, two electric capacity board central authorities open the semicircular groove that has the concentric circles respectively, and the transmission of electricity wire passes recess, two the other end lock of electric capacity board will plate electrode A and plate electrode B install on the transmission of electricity wire along transmission of electricity wire interval arrangement in proper order.
2. The transmission line icing monitoring system according to claim 1, characterized in that the equipotential ring (16) is not provided on the electrode plate B.
3. The power transmission line icing monitoring system of claim 1, wherein the main control part comprises an insulating shell, a microprocessor (1) is installed inside the insulating shell, the microprocessor (1) is connected with the monitoring unit (2) through a lead, and the microprocessor (1) is respectively connected with a temperature and humidity sensor (4), a data storage module (6), a power supply control module (10), an RTC timing module (19) and a remote communication module (7);
the output end of the monitoring unit (2) is connected with the input end of a sigma-delta capacitance-to-digital converter (3), and the output end of the sigma-delta capacitance-to-digital converter (3) is connected with the microprocessor (1);
the input end of the power control module (10) is respectively connected with the lead mutual inductance energy-taking module (8) and the storage battery (11).
4. The transmission line icing monitoring system according to claim 3, characterized in that the temperature and humidity sensor (4) is connected to the microprocessor (1) via an RS232 level.
5. The transmission line icing monitoring system according to claim 3, wherein an output end of the wire mutual inductance energy-taking module (8) is connected with an input end of a signal conditioning circuit (9), and an output end of the signal conditioning circuit (9) is connected with the power control module (10).
6. The transmission line icing monitoring system according to claim 3, wherein the lead mutual inductance energy-taking module (8) is an epoxy resin-encapsulated open-close type current transformer.
7. The transmission line icing monitoring system of claim 1, wherein the wireless communication is in a ZigBee mode.
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| CN201920257961.9U CN210090238U (en) | 2019-02-28 | 2019-02-28 | Transmission line icing monitoring system |
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| CN201920257961.9U CN210090238U (en) | 2019-02-28 | 2019-02-28 | Transmission line icing monitoring system |
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| CN210090238U true CN210090238U (en) | 2020-02-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113324467A (en) * | 2021-05-27 | 2021-08-31 | 贵州电网有限责任公司 | Device and method for monitoring equivalent icing thickness of lead based on ice dielectric capacitance effect |
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2019
- 2019-02-28 CN CN201920257961.9U patent/CN210090238U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113324467A (en) * | 2021-05-27 | 2021-08-31 | 贵州电网有限责任公司 | Device and method for monitoring equivalent icing thickness of lead based on ice dielectric capacitance effect |
| CN113324467B (en) * | 2021-05-27 | 2023-03-31 | 贵州电网有限责任公司 | Device and method for monitoring equivalent icing thickness of lead based on ice dielectric capacitance effect |
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