CN112414471A - Safety monitoring system for power transmission tower in alpine region - Google Patents
Safety monitoring system for power transmission tower in alpine region Download PDFInfo
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- CN112414471A CN112414471A CN202011356894.XA CN202011356894A CN112414471A CN 112414471 A CN112414471 A CN 112414471A CN 202011356894 A CN202011356894 A CN 202011356894A CN 112414471 A CN112414471 A CN 112414471A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 64
- 238000012544 monitoring process Methods 0.000 title claims abstract description 50
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 64
- 229910052742 iron Inorganic materials 0.000 claims abstract description 32
- 239000011229 interlayer Substances 0.000 claims abstract description 24
- 238000005485 electric heating Methods 0.000 claims abstract description 22
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 14
- 239000011449 brick Substances 0.000 claims abstract description 13
- 238000005338 heat storage Methods 0.000 claims abstract description 12
- 230000001133 acceleration Effects 0.000 claims abstract description 11
- 238000010248 power generation Methods 0.000 claims abstract description 6
- 238000006073 displacement reaction Methods 0.000 claims abstract description 4
- 238000009529 body temperature measurement Methods 0.000 claims description 12
- 238000005259 measurement Methods 0.000 claims description 12
- 238000009413 insulation Methods 0.000 claims description 10
- 239000010410 layer Substances 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract 1
- 238000013480 data collection Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Classifications
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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
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
- G05B19/0425—Safety, monitoring
-
- 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
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2612—Data acquisition interface
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
A safety monitoring system for a power transmission tower in a severe cold area belongs to the field of safety monitoring of power transmission towers. The invention aims at the problem that the existing monitoring system of the power transmission tower cannot work normally in a low-temperature environment. The method comprises the following steps: the three-way vibration acceleration sensor collects acceleration, speed and displacement signals; the stress sensor collects a strain stress signal; the inclination sensor collects inclination signals; the data acquisition box acquires and stores real-time signals of all the sensors; the sensor and the data acquisition box are connected by adopting a low-temperature resistant shielded cable; heat storage bricks are arranged in an interlayer of the data acquisition box, and an electric heating device is arranged between the heat storage bricks; the side wall of the box body is provided with a wire inserting hole for connecting a data acquisition unit in the data acquisition box with the low temperature resistant shielding cable; the power supply is a photovoltaic power generation power supply; the data acquisition unit adopts lithium cell or power supply, and the power still is used for supplying power for lithium cell and electric heater unit. The invention is used for monitoring the state of the power transmission iron tower in the alpine region.
Description
Technical Field
The invention relates to a safety monitoring system for a power transmission tower in a severe cold area, belonging to the field of safety monitoring of power transmission towers.
Background
The transmission tower is a supporting point of an overhead line, and the working state of the transmission tower is directly related to the safety of a transmission line. The safety of the power transmission iron tower is influenced by various factors such as weather, topography, metal fatigue strength, corrosion resistance and the like, and the effective means for ensuring the reliability of the power transmission iron tower is to monitor the state of the power transmission iron tower safely.
The power transmission iron tower in the alpine region faces extremely severe working environment in cold winter, and the lowest temperature of the power transmission iron tower can reach below minus 40 ℃. In such a low temperature environment, the ordinary monitoring system cannot work normally.
Disclosure of Invention
The invention provides a safety monitoring system for a power transmission tower in a severe cold region, aiming at the problem that the conventional monitoring system for the power transmission tower cannot work normally in a low-temperature environment.
The invention discloses a three-way vibration acceleration sensor 100, which is used for measuring acceleration, speed and displacement signals of a monitoring point on a power transmission iron tower;
the stress sensor 200 is used for measuring a strain stress signal of a monitoring point on the power transmission iron tower;
the inclination sensor 300 is used for measuring an inclination signal of the power transmission tower;
the data acquisition box 400 is used for acquiring and storing real-time signals of all the sensors;
all sensors are connected with the data acquisition box 400 by adopting low-temperature-resistant shielded cables;
the side wall of the box body of the data acquisition box 400 comprises an interlayer formed by an inner wall heat insulation layer and an outer wall heat insulation layer, wherein heat storage bricks are arranged in the interlayer, and an electric heating device is arranged between the heat storage bricks; the side wall of the box body is provided with a wire inserting hole for realizing the connection between the data acquisition unit in the data acquisition box 400 and the low temperature resistant shielding cable;
a power supply 500, which is a photovoltaic power generation power supply;
the data acquisition unit adopts a lithium battery or a power supply 500 to supply power, and the power supply 500 is also used for supplying power for the lithium battery and the electric heating device.
According to the safety monitoring system of the power transmission iron tower in the alpine region, the three-way vibration acceleration sensors 100 and the stress sensors 200 respectively comprise eight sensors, and the eight sensors are correspondingly arranged at eight monitoring points in pairs; the eight monitoring point selection positions comprise: the four position points which are close to the root part of the power transmission iron tower and are positioned on the same plane and the four position points which are positioned on the same plane at the throat part of the power transmission iron tower.
According to the safety monitoring system of the power transmission tower in the alpine region, the two inclination sensors 300 are correspondingly arranged at two monitoring points; the two monitoring point selection positions comprise: two position points on the symmetrical line of the middle upper part of the power transmission iron tower.
According to the safety monitoring system for the power transmission iron tower in the alpine region, the data acquisition box 400 is internally provided with an in-box temperature measuring sensor, and an interlayer temperature measuring sensor is arranged in an interlayer.
According to the safety monitoring system of the power transmission iron tower in the alpine region, the inner wall heat insulation layer is arranged in a shutter mode, and the opening angle of the shutter is determined according to the measurement data of the two temperature measurement sensors;
the corresponding relation between the opening angle of the shutter and the measurement data of the two temperature measurement sensors comprises the following steps:
setting the temperature value acquired by the in-box temperature measuring sensor to be T1 and the temperature value acquired by the interlayer temperature measuring sensor to be T2;
if T1 is more than or equal to 20 ℃, closing the shutter;
if T1 is less than or equal to-10 ℃, the shutter is completely opened;
if-10 ℃ < T1<20 ℃, and T2-T1>5 ℃, the percentage of the shutter opening is expressed by K:
K＝(T1-20)/(-30)×100％。
according to the safety monitoring system of the power transmission iron tower in the alpine region, the electric quantity provided by the power supply 500 to the electric heating device is determined according to the measurement data of the interlayer temperature measurement sensor;
the corresponding relationship between the electric quantity provided by the power supply 500 to the electric heating device and the measurement data of the interlayer temperature measurement sensor includes:
if T2 is not less than 200 ℃, the electric quantity provided by the power supply 500 to the electric heating device is 0;
if T2 is less than or equal to 20 ℃, the electric quantity provided by the power supply 500 to the electric heating device is 80% of the total electric quantity;
if 20 ℃ < T2<200 ℃, P represents the percentage of the electric power supplied by the power supply 500 to the electric heating device:
P＝(80-(T2-20)/180×80)×％。
according to the safety monitoring system of the power transmission tower in the alpine region, the data acquisition unit transmits data to the data center through the GPRS.
The invention has the beneficial effects that: the power supply adopts photovoltaic power generation, and can provide power for the lithium battery and the electric heating device in the data acquisition box; in order to enable the monitoring system to work normally in a low-temperature environment, the data acquisition box adopts a double-layer heat insulation structure, can adopt heat storage bricks to store heat when the illumination is sufficient, and releases heat when the temperature is low, so that the temperature in the data acquisition box is in a controllable range.
According to the invention, the data cable between the components adopts a low-temperature-resistant shielding cable, and the battery in the data acquisition box adopts a low-temperature-resistant lithium battery, so that powerful guarantee is provided for normal work of the monitoring system in a low-temperature environment.
Drawings
Fig. 1 is a block diagram of a safety monitoring system for a power transmission tower in an alpine region according to the present invention;
fig. 2 is a schematic diagram of selection of monitoring points on a power transmission tower.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
First embodiment, as shown in fig. 1 and 2, the present invention provides a safety monitoring system for a power transmission tower in an alpine region, including,
the three-way vibration acceleration sensor 100 is used for measuring acceleration, speed and displacement signals of a monitoring point on the power transmission iron tower;
the stress sensor 200 is used for measuring a strain stress signal of a monitoring point on the power transmission iron tower;
the inclination sensor 300 is used for measuring an inclination signal of the power transmission tower; the inclination signal comprises parameters such as a down-line inclination, a transverse inclination and the like;
the data acquisition box 400 is used for acquiring and storing real-time signals of all the sensors;
all sensors are connected with the data acquisition box 400 by adopting low-temperature-resistant shielded cables;
the side wall of the box body of the data acquisition box 400 comprises an interlayer formed by an inner wall heat insulation layer and an outer wall heat insulation layer, wherein heat storage bricks are arranged in the interlayer, and an electric heating device is arranged between the heat storage bricks; the side wall of the box body is provided with a wire inserting hole for realizing the connection between the data acquisition unit in the data acquisition box 400 and the low temperature resistant shielding cable;
a power supply 500, which is a photovoltaic power generation power supply;
the data acquisition unit adopts a lithium battery or a power supply 500 to supply power, and the power supply 500 is also used for supplying power for the lithium battery and the electric heating device.
In the embodiment, the photovoltaic power generation power supply can provide electric power for the lithium battery, for example, when the light is sufficient, the lithium battery is charged, so that the lithium battery can supply power for the data acquisition unit at night or when the light is insufficient; and on the other hand, can provide power to the electrical heating devices within data collection box 400. In the data collection box 400, the data collection unit is mainly used for receiving data collected by various sensors and storing the data. In the interlayer of the data acquisition box 400, under the condition of high ambient temperature in the daytime, the electric heating device stores heat bricks; at night or in cold weather, the heat storage bricks release heat, so that the temperature in the data acquisition box 400 is not too low.
The number of the heat storage bricks can be selected according to heating requirements, so that the heat storage bricks are uniformly dispersed in the interlayer, and the heat balance in the data acquisition box 400 is favorably ensured.
The data acquisition box 400 is selectively installed on the power transmission tower at a position convenient for wiring with each sensor.
Further, as shown in fig. 2, each of the three-way vibration acceleration sensor 100 and the stress sensor 200 includes eight, and the eight are correspondingly disposed at eight monitoring points in pairs; the eight monitoring point selection positions comprise: the four position points which are close to the root part of the power transmission iron tower and are positioned on the same plane and the four position points which are positioned on the same plane at the throat part of the power transmission iron tower.
The eight monitoring points are selected according to the principle that the vibration risk is large and representative positions are shown, such as four points A1, B1, C1 and D1 and four points A, B, C, D in FIG. 2; the four points A1, B1, C1 and D1 are close to the root of the power transmission tower but are protected from the ground by a certain distance, so that the stability of the acquired data can be ensured. The throat part of the power transmission iron tower refers to the position where the cross-sectional area of the power transmission iron tower is the smallest.
Still further, as shown in fig. 2, the tilt sensor 300 includes two sensors, which are correspondingly disposed at two monitoring points; the two monitoring point selection positions comprise: two position points on the symmetrical line of the middle upper part of the power transmission iron tower.
The two monitoring points are approximately positioned above two thirds of the height of the whole power transmission iron tower.
Still further, an in-box temperature measuring sensor is arranged in the data acquisition box 400, and an interlayer temperature measuring sensor is arranged in the interlayer.
Furthermore, the inner wall heat insulation layer is arranged in a shutter mode, the shutter can be opened at a certain angle according to needs, and the opening angle of the shutter is determined according to the measurement data of the two temperature measurement sensors;
the corresponding relation between the opening angle of the shutter and the measurement data of the two temperature measurement sensors comprises the following steps:
setting the temperature value acquired by the in-box temperature measuring sensor to be T1 and the temperature value acquired by the interlayer temperature measuring sensor to be T2;
if T1 is more than or equal to 20 ℃, closing the shutter;
if T1 is less than or equal to-10 ℃, the shutter is completely opened;
if-10 ℃ < T1<20 ℃, and T2-T1>5 ℃, the percentage of the shutter opening is expressed by K:
K＝(T1-20)/(-30)×100％。
still further, the amount of electricity supplied by the power supply 500 to the electrical heating device is determined according to the measurement data of the interlayer temperature measurement sensor;
the corresponding relationship between the electric quantity provided by the power supply 500 to the electric heating device and the measurement data of the interlayer temperature measurement sensor includes:
if T2 is not less than 200 ℃, the electric quantity provided by the power supply 500 to the electric heating device is 0;
if T2 is less than or equal to 20 ℃, the electric quantity provided by the power supply 500 to the electric heating device is 80% of the total electric quantity; the other 20% of the electricity is used for supplying power to the lithium battery;
if 20 ℃ < T2<200 ℃, P represents the percentage of the electric power supplied by the power supply 500 to the electric heating device:
P＝(80-(T2-20)/180×80)×％。
still further, the data acquisition unit transmits data to the data center through GPRS.
The data acquisition unit can respectively transmit data to two adjacent upstream and downstream towers through GPRS (general packet radio service), and sequentially transmit the data to two different directions along the transmission line until two data centers of terminals at two sides of the transmission line.
The monitoring system is arranged on each power transmission iron tower, so that when data transmission is carried out, once the data acquisition box on a certain power transmission iron tower in the middle is abnormal, the data transmission of other power transmission iron towers is not influenced, and the position of a fault iron tower is easy to judge.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (7)
1. A safety monitoring system for a power transmission iron tower in an alpine region is characterized by comprising,
the three-way vibration acceleration sensor (100) is used for measuring acceleration, speed and displacement signals of a monitoring point on the power transmission iron tower;
the stress sensor (200) is used for measuring a strain stress signal of a monitoring point on the power transmission tower;
an inclination sensor (300) for measuring an inclination signal of the power transmission tower;
the data acquisition box (400) is used for acquiring and storing real-time signals of all the sensors;
all the sensors are connected with the data acquisition box (400) by adopting low temperature resistant shielding cables;
the side wall of the box body of the data acquisition box (400) comprises an interlayer formed by an inner wall heat insulation layer and an outer wall heat insulation layer, wherein heat storage bricks are arranged in the interlayer, and an electric heating device is arranged between the heat storage bricks; the side wall of the box body is provided with a wire inserting hole for realizing the connection between a data acquisition unit in the data acquisition box (400) and a low-temperature resistant shielding cable;
a power supply (500) employing a photovoltaic power generation power supply;
the data acquisition unit adopts lithium cell or power (500) power supply, and power (500) still are used for supplying power for lithium cell and electric heater unit.
2. The safety monitoring system for the power transmission tower in the alpine region according to claim 1,
the three-direction vibration acceleration sensors (100) and the stress sensors (200) respectively comprise eight sensors, and the eight sensors are correspondingly arranged at eight monitoring points in pairs; the eight monitoring point selection positions comprise: the four position points which are close to the root part of the power transmission iron tower and are positioned on the same plane and the four position points which are positioned on the same plane at the throat part of the power transmission iron tower.
3. The safety monitoring system for the power transmission tower in the alpine region according to claim 1,
the two inclination sensors (300) are correspondingly arranged at two monitoring points; the two monitoring point selection positions comprise: two position points on the symmetrical line of the middle upper part of the power transmission iron tower.
4. Safety monitoring system for power transmission towers in alpine regions according to any one of claims 1 to 3,
an in-box temperature measuring sensor is arranged in the data acquisition box (400), and an interlayer temperature measuring sensor is arranged in the interlayer.
5. The safety monitoring system for the power transmission tower in the alpine region according to claim 4,
the inner wall heat insulation layer is arranged in a shutter mode, and the opening angle of the shutter is determined according to the measurement data of the two temperature measurement sensors;
the corresponding relation between the opening angle of the shutter and the measurement data of the two temperature measurement sensors comprises the following steps:
setting the temperature value acquired by the in-box temperature measuring sensor to be T1 and the temperature value acquired by the interlayer temperature measuring sensor to be T2;
if T1 is more than or equal to 20 ℃, closing the shutter;
if T1 is less than or equal to-10 ℃, the shutter is completely opened;
if-10 ℃ < T1<20 ℃, and T2-T1>5 ℃, the percentage of the shutter opening is expressed by K:
K＝(T1-20)/(-30)×100％。
6. the safety monitoring system for the power transmission tower in the alpine region according to claim 5,
the amount of electricity supplied by the power supply (500) to the electric heating device is determined according to the measurement data of the interlayer temperature measurement sensor;
the corresponding relation between the electric quantity provided by the power supply (500) to the electric heating device and the measurement data of the interlayer temperature measurement sensor comprises the following steps:
if T2 is more than or equal to 200 ℃, the electric quantity provided by the power supply (500) to the electric heating device is 0;
if T2 is less than or equal to 20 ℃, the electric quantity provided by the power supply (500) to the electric heating device is 80% of the total electric quantity;
if 20 ℃ < T2<200 ℃, P represents the percentage of the electric quantity provided by the power supply (500) to the electric heating device:
P＝(80-(T2-20)/180×80)×％。
7. the safety monitoring system for the power transmission tower in the alpine region according to claim 6,
and the data acquisition unit transmits data to the data center through GPRS.
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