CN108692690B - Power transmission line equivalent icing thickness monitoring system and method - Google Patents
Power transmission line equivalent icing thickness monitoring system and method Download PDFInfo
- Publication number
- CN108692690B CN108692690B CN201810892801.1A CN201810892801A CN108692690B CN 108692690 B CN108692690 B CN 108692690B CN 201810892801 A CN201810892801 A CN 201810892801A CN 108692690 B CN108692690 B CN 108692690B
- Authority
- CN
- China
- Prior art keywords
- wire
- monitoring
- insulator string
- tower
- inclination angle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 47
- 230000005540 biological transmission Effects 0.000 title claims abstract description 28
- 239000012212 insulator Substances 0.000 claims abstract description 59
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 abstract description 18
- 239000000725 suspension Substances 0.000 abstract description 4
- 230000007547 defect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000005303 weighing Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 238000012806 monitoring device Methods 0.000 description 3
- 238000004422 calculation algorithm Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 108700041286 delta Proteins 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012850 discrimination method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/08—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness for measuring thickness
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electric Cable Installation (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention provides a system and a method for monitoring equivalent icing thickness of a power transmission line, wherein the system comprises a wire inclination sensor and/or an insulator string inclination sensor and a main controller; the wire inclination sensor is arranged at a wire hanging point, the insulator string inclination sensor is arranged on the suspension insulator string, and the main controller is arranged on the tower cross arm; and the wire inclination angle sensor and/or the insulator string inclination angle sensor are in communication connection with the main controller. The system conveniently and accurately monitors the icing of the transmission line wire, and meets the requirements of early warning and monitoring of the electric power department.
Description
Technical Field
The invention belongs to the field of online monitoring of power transmission lines, and particularly relates to a system and a method for monitoring equivalent icing thickness of a power transmission line.
Background
The anti-icing and anti-icing method is a heavy duty of the work of the power transmission line in the past year, and the current monitoring methods of the equivalent icing thickness at home and abroad are various, including an inclination angle method, a weighing method, an image equivalent discrimination method, a meteorological method and the like. The application is more widely two methods, namely a weighing method and an inclination angle method. However, the equivalent icing thickness technology based on the two methods has certain defects and shortcomings, and mainly comprises the following aspects:
the weighing method equivalent icing thickness monitoring technology has the following defects: 1. the comparison applies to straight towers, but not so much to strain towers: the basic principle of indirectly monitoring the equivalent icing thickness by monitoring the vertical load change in the vertical span is based on a weighing method, and the weighing method is not suitable for monitoring the icing thickness in a tension-resistant occasion, so that the distribution selectivity of the icing monitoring device is greatly influenced; 2. the existing insulator string tension sensor adopts an installation mode mainly comprising replacement of a ball head hanging ring, is complex and tedious in operation process, and is not beneficial to field installation and operation and maintenance work; 3. the replaced hardware fitting has various types and different structures, so that the types of the tension sensors of the insulator strings are numerous and cannot be interchanged; 4. the circuit hardware fitting is replaced, and hidden danger is increased for the safe operation of the circuit.
The defects of the inclination angle method equivalent icing thickness monitoring technology are as follows: 1. the design of the power supply system has the defects that: the conventional wire inclination angle and temperature sensor has defects in an energy taking mode, and the normal operation of the sensor in the energy taking mode is greatly dependent on the stability degree (small application range) of the wire current due to the use of a wire induction energy taking mode, so that the operation of a power supply system is always unstable, and the failure rate of the sensor is always high. 2. The accuracy of the monitored data is poor: studies have shown that there are three main reasons for poor monitoring accuracy: 1) The wire inclination method needs to have a high-precision wire inclination monitoring sensor as a support, and the accuracy level of the wire inclination monitoring sensor is required to be within 0.1 degrees; 2) Under the working condition of strong wind, the wire is in a motion state, if the wire inclination angle data is simply sampled at the moment, the noise caused by wind load is not filtered, the accuracy of monitoring the wire inclination angle is greatly affected, and finally the accuracy of monitoring the equivalent icing thickness of the wire is affected; 3) The influence of the inclination angle of the insulator string on icing monitoring is not fully considered, unbalanced tension of different degrees exists on two sides of the suspension insulator string under the icing working condition, the more serious the icing is, the more obvious the unbalanced tension difference is, and the numerical simulation result shows that if the trace change of the wire span caused by the unbalanced tension is ignored, larger errors can be caused in the finally calculated wire stress and the equivalent icing thickness.
In summary, the power division needs to have an accurate and effective monitoring device and system for the equivalent icing thickness of the power transmission line to measure and analyze the icing thickness of the power transmission line in real time under the actual working condition.
Disclosure of Invention
Based on the method, the invention provides the system and the method for monitoring the equivalent icing thickness of the power transmission line, which conveniently and accurately monitor the icing of the power transmission line wire and meet the requirements of early warning and monitoring of the power department. The technical scheme adopted by the method is as follows:
a power transmission line equivalent icing thickness monitoring system comprises a wire inclination sensor, an insulator string inclination sensor and a main controller;
the wire inclination sensor is arranged at a wire hanging point, the insulator string inclination sensor is arranged on the suspension insulator string, and the main controller is arranged on the tower cross arm; and the wire inclination angle sensor and the insulator string inclination angle sensor are in communication connection with the main controller.
A method for monitoring the equivalent icing thickness of a power transmission line comprises the following steps:
obtaining the temperature t of the wire in an unknown state n Inclination angle theta at outlet of wire hanging point An Inclination angle theta of insulator string of tower Bn Inclination angle theta of adjacent tower insulator string Cn ；
According to the length lambda of the insulator string of the tower 1 Length lambda of insulator string of adjacent tower 2 And the inclination angle theta of the insulator string of the tower Bn Inclination angle theta of adjacent tower insulator string Cn Using the formula: Δ1=λ 1 ×sinθ Bn +λ 2 ×sinθ Cn Calculating the gear increment delta 1;
according to the formula: Δh=λ 1 ×(1-cosθ Bn )-λ 2 ×(1-cosθ cn ) Calculating a height difference increment delta h;
according to the set temperature t of the wire m The span l and the height difference h under no external load are calculated by the following formula:
calculating the altitude difference angle beta under the current gear n ；
According to the dead weight W of the unit length of the wire, the final elastic coefficient E of the wire and the set temperature t m Differential angle beta and wire horizontal stress sigma under no external load m Calculating the horizontal stress sigma of the wire under the preset temperature and no external load of the temperature of the wire under the current span by utilizing Newton iteration method 01 The calculation formula is as follows:
wherein, gamma is wire selfThe weight of the load is the same as the load,
linear expansion coefficient alpha and the set temperature t according to the temperature of the wire m Calculating the horizontal stress sigma of the wire in an unknown state by using the following formula n And wire combined specific load gamma n ：
According to the wire cross-sectional area S, the formula is utilized: w (w) n ＝γ n Calculating the load w of the unit length of the lead under the unknown state by using the X S n ；
According to the dead weight W of the unit length of the wire and the outer diameter D of the wire, the formula is utilized: w (w) n =w+ 0.027728b. (b+d), the equivalent icing thickness b is calculated
The invention provides a power transmission line equivalent icing thickness monitoring system, which comprises a wire inclination sensor (outputting a wire temperature value and a wire inclination value), an insulator string inclination sensor and a main controller, wherein the insulator string inclination sensor is connected with the main controller; the wire inclination sensor is arranged at a wire hanging point, the insulator string inclination sensor is arranged on the suspension insulator string, the main controller is arranged on the tower cross arm, and the wire inclination sensor and the insulator string inclination sensor are in communication connection with the main controller, so that the icing thickness monitoring is realized.
The invention provides a method for monitoring the equivalent icing thickness of a power transmission line. According to the method, the influence of the inclination angle of the insulator string on icing monitoring is fully considered, and the monitoring modes are divided into three types of a resistant-resistant mode, a straight-resistant mode and a straight-straight mode according to different tower line systems. The method is reasonable and correct, simple in algorithm and accurate in result, can be suitable for calculating the thickness of the ice coating in the strain section of the line, can conveniently and accurately monitor the ice coating of the overhead transmission line, and completely meets the requirements of early warning and monitoring of the electric power department.
The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, with reference to the preferred embodiments of the present invention and the accompanying drawings. Specific embodiments of the present invention are given in detail by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
fig. 1 is a block diagram of a power transmission line equivalent icing thickness monitoring system according to an embodiment of the present invention;
fig. 2 is a block diagram of another power transmission line equivalent icing thickness monitoring system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a monitor mode of the straight-straight mode;
FIG. 4 is a schematic diagram of a monitoring mode of the straight-through mode;
fig. 5 is a schematic diagram of a monitoring mode of the resistance-resistance mode.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, on the premise of no conflict, the following embodiments or technical features may be arbitrarily combined to form new embodiments.
As shown in fig. 1, the embodiment of the invention provides a system for monitoring the equivalent icing thickness of a power transmission line, which comprises a wire inclination sensor (outputting a wire temperature value and a wire inclination value), an insulator string inclination sensor and a main controller; the wire inclination sensor is installed in wire hanging point department, and insulator chain inclination sensor installs on hanging insulator chain, and main control unit installs on the shaft tower cross arm, and wire inclination sensor and insulator chain inclination sensor and main control unit communication connection to real time value icing thickness monitoring. Specifically, the communication connection may be a wireless communication connection or a wired communication connection, and in one embodiment, the communication connection is a radio frequency communication connection.
Further, as shown in fig. 2, the wire inclination sensor is of an integrally formed structure, and the sensor end can identify the movement state of the wire, so that the wire is kept stable, and noise caused by wind load is directly eliminated. The inside mainly comprises: the device comprises a temperature-dip angle module, a first communication module and a first power supply module. The temperature-dip angle module processes the wire temperature value and the wire dip angle value acquired in the field and then transmits the processed wire temperature value and the wire dip angle value to the main controller through the first communication module, and the first power supply module supplies power to the whole wire dip angle sensor.
The insulator string inclination sensor is of an integrated structure, and the sensor end can be used for identifying the motion state of a wire, so that the insulator string inclination sensor keeps steady state and directly eliminates noise caused by wind load. The inside mainly comprises: the device comprises an inclination angle module, a second communication module and a second power supply module. The inclination angle module processes the inclination angle value of the insulator string acquired on site and then transmits the processed inclination angle value to the main controller through the second communication module, and the power supply module supplies power to the whole insulator string inclination angle sensor.
In this embodiment, the first communication module, the second communication module, and the main controller include a radio frequency communication unit; the temperature-dip angle module processes the wire temperature value and the wire dip angle value acquired in the field and then transmits the processed wire temperature value and the wire dip angle value to the main controller in an RF (Radio Frequency) communication mode; the inclination angle module processes the inclination angle value of the insulator string acquired on site and transmits the processed inclination angle value to the main controller in an RF communication mode. Further, the first power supply module and the second power supply module include a solar unit and a lithium iron phosphate battery.
Referring to fig. 3 to 5, the wire inclination icing monitoring mode is classified into three types, namely, a withstand-withstand mode (fig. 5), a straight-withstand mode (fig. 4) and a straight-straight (fig. 3) mode, according to the tower wire system. The refractory refers to Zhang Dada type, and the straight refers to straight tower type; the former in the monitoring mode representation refers to the tower type of the tower, and the latter refers to the adjacent tower type, such as straight-resisting, which means that the tower type of the tower is a straight tower, and the adjacent tower type is a tension tower. The resistant-resistant mode sensor is arranged to: the tower wire inclination sensor; the direct-mode tolerant sensor is arranged to: the inclination sensor of the tower wire and the inclination sensor of the insulator string of the tower; the straight-straight mode sensor is arranged to: the inclination sensor of the wire of the tower, the inclination sensor of the insulator string of the tower and the inclination sensor of the insulator string of the adjacent tower; in particular, the arrangement of the insulator string tilt sensor and the wire tilt sensor can be seen in fig. 3-5.
Based on the monitoring mode, the invention provides a method for monitoring the equivalent icing thickness of a power transmission line, which comprises the following steps:
1) Collecting characteristic parameters of a wire to be tested and basic data of a circuit, wherein the characteristic parameters comprise the following specific items:
d-wire outer diameter (mm)
S-wire sectional area (mm 2)
Alpha-wire temperature coefficient of linear expansion (1/DEGC)
W-dead weight per unit length of wire (N/m)
E-wire final modulus of elasticity (N/mm 2)
λ 1 Length of insulator string of this tower (m)
λ 2 Length of insulator string of adjacent tower (m)
2) The known state parameters of the collecting wire at 5 ℃ without external load are measured, and the method specifically comprises the following steps:
t m -the temperature of the wire in a known state (DEG C), this value being defined as 5 DEG C
f m -centre sag (m) of the span in known condition
l-span (m)
h-height difference (m)
Beta-altitude difference angle (°)
σ m Horizontal stress of the wire in known state (N/mm 2)
2.1 Calculating the altitude difference angle beta (°):
2.2 Calculating the wire horizontal stress (N/mm 2) at a known state:
wherein gamma is the specific load (N/m.mm) of the wire under a known state 2 ) Calculated according to the following formula:
3) And installing a wire inclination angle sensor on each gear of line wire according to different tower wire systems, wherein the wire inclination angle sensor is used for measuring the wire inclination angle value and the wire temperature value of the line in real time, and the inclination angle sensor is installed at the hanging point A of the insulator string and used for measuring the inclination angle of the insulator string in real time. Measuring and collecting unknown state parameters:
t n -wire temperature in unknown state (DEG C)
θ An -inclination angle (°) at a wire-hanging point exit a in unknown state
θ Bn -inclination angle (°) of the insulator string of the column in unknown state
Note that: θ Bn Is polar, negative when the string is tilted to the monitor rail side, and positive otherwise.
θ Cn -inclination angle (°) of insulator string of adjacent column in unknown state
Note that: θ Cn Is polar, negative when the string is tilted to the monitor rail side, and positive otherwise.
4) Calculating the ice coating thickness b (mm) in an unknown state:
4.1 Calculating the span increment (m):
according to the formula: Δ1=λ 1 ×sinθ Bn +λ 2 ×sinθ Cn
Wherein lambda is in different monitoring modes 1 、λ 2 、θ Bn 、θ Cn The value method of (2):
resistance-resistance monitoring mode: lambda (lambda) 1 、λ 2 、θ Bn 、θ Cn All are directly assigned with 0;
direct-resistance monitoring mode: lambda (lambda) 2 、θ Cn Are all directly assigned 0, lambda 1 、θ Bn Is the actual monitoring value;
straight-straight monitoring mode: lambda (lambda) 1 、λ 2 、θ Bn 、θ Cn Are all actual monitoring values.
4.2 Calculating the elevation difference increment (m):
Δh＝λ 1 ×(1-cosθ Bn )-λ 2 ×(1-cosθ cn )
4.3 Calculating the altitude difference angle (m) under the current gear:
4.4 According to Newton iteration method, calculating the horizontal stress sigma of the wire under the current span when the temperature of the wire is 5 ℃ and no external load exists 01 (N/mm2)：
Wherein:
gamma is the self-weight specific load of the lead,
4.5 Calculating the horizontal stress sigma of the wire in an unknown state n (N/mm 2) and wire combined specific load gamma n (N/m·mm 2 )：
4.6 Calculating the load w of the unit length of the lead in an unknown state n (N/m·mm 2 )：
w n ＝γ n ×S
4.7 Calculating the equivalent icing thickness b (mm):
w n ＝w+0.027728b·(b+D)
according to the above monitoring method, the distance specification uses a certain type of LGJ-300/40 wire as the wire to be tested, and the monitoring mode is as follows: in the straight-straight mode, the collected wire characteristic parameters and line base data required for measuring the icing thickness are as follows:
l-450(m)
h-11(m)
f m —5.8(m)
t m —5℃
D—23.94(mm)
S—338.99(mm 2 )
α—19.6*10 -6 (1/℃)
W—1133(Kg/Km)
λ 1 —6.36(m)
λ 2 —6.36(m)
the transmission line dip angle monitoring device is arranged on a line conductor to be measured, the wire dip angle value and the wire temperature value are measured in real time, and the wire dip angle value and the wire temperature value measured at a certain moment are respectively as follows: 5.6 °; -5 ℃.
The inclination sensor is arranged on the insulator string, and the inclination value of the insulator string of the tower and the inclination value of the insulator string of the neighbor tower at the same moment are measured in real time and are respectively as follows: 2 °;1.3 deg..
The current state wire equivalent icing thickness finally calculated by the calculation model is as follows: 9.01mm.
According to the invention, the influence of the inclination angle of the insulator string on icing monitoring is fully considered, three wire inclination angle method icing monitoring modes are provided according to different tower wire systems, and the equivalent icing thickness of the power transmission line is calculated and determined by collecting wire characteristic parameters and line basic data and measuring the wire temperature, the inclination angle of the insulator string and the line wire inclination angle (noise caused by wind load is removed by sensor end processing) in real time. The beneficial effects of the invention are as follows: firstly, the inclination angle sensor has small volume, light weight and low manufacturing cost; secondly, the sensor has uniform structure and uniform measuring range, and is beneficial to production, installation and maintenance; thirdly, hardware replacement is not needed relative to a tension method, and the operation safety of the circuit is not influenced; fourthly, the method has better performance in tension-resistant occasions, is particularly suitable for icing monitoring of isolated gears, and well makes up for the defects of a tension icing monitoring mode; fifthly, the wire temperature and inclination angle sensor is integrated in the same component (wire inclination angle sensor), and the system structure is simple; sixthly, wireless signal transmission is adopted, so that the defect that a cable is easy to fail due to poor environmental adaptability in a wired signal transmission mode is overcome, and the reliability of the system is improved; seventh, the wireless signal adopts a unified air interface, so that the problem of consistency of mechanical and electrical parameters in a physical interface is solved, and the interchangeability of components is good. Eighth, real-time monitoring of the equivalent icing thickness is realized. Therefore, the system and the method are reasonable and correct, the algorithm is simple, the result is accurate, and the monitoring of the icing thickness of the overhead transmission line under the non-uniform icing working condition is conveniently and accurately realized.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way; those skilled in the art can smoothly practice the invention as shown in the drawings and described above; however, those skilled in the art will appreciate that many modifications, adaptations, and variations of the present invention are possible in light of the above teachings without departing from the scope of the invention; meanwhile, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present invention still fall within the scope of the present invention.
Claims (5)
1. The method for monitoring the equivalent icing thickness of the power transmission line is characterized by comprising the following steps of:
obtaining the temperature t of the wire in an unknown state n GuideInclination angle theta at outlet of line hanging point An Inclination angle theta of insulator string of tower Bn Inclination angle theta of adjacent tower insulator string Cn ；
According to the length lambda of the insulator string of the tower 1 Length lambda of insulator string of adjacent tower 2 And the inclination angle theta of the insulator string of the tower Bn Inclination angle theta of adjacent tower insulator string Cn Using the formula: Δl=λ 1 ×sinθ Bn +λ 2 ×sinθ Cn Calculating the gear increment delta l;
according to the formula: Δh=λ 1 ×(1-cosθ Bn )-λ 2 ×(1-cosθ cn ) Calculating a height difference increment delta h;
according to the set temperature t of the wire m The span l and the height difference h under no external load are calculated by the following formula:
calculating the altitude difference angle beta under the current gear n ；
According to the dead weight W of the unit length of the wire, the final elastic coefficient E of the wire and the set temperature t m Differential angle beta and wire horizontal stress sigma under no external load m Calculating the horizontal stress sigma of the wire under the preset temperature and no external load of the temperature of the wire under the current span by utilizing Newton iteration method 01 The calculation formula is as follows:
wherein, gamma is the self-weight specific load of the lead,
linear expansion coefficient alpha and the set temperature t according to the temperature of the wire m Calculating the horizontal stress sigma of the wire in an unknown state by using the following formula n And wire combined specific load gamma n ：
According to the wire cross-sectional area S, the formula is utilized: w (w) n ＝γ n Calculating the load w of the unit length of the lead under the unknown state by using the X S n ；
According to the dead weight W of the unit length of the wire and the outer diameter D of the wire, the formula is utilized: w (w) n =w+ 0.027728b· (b+d), the equivalent icing thickness b is calculated.
2. The method for monitoring the equivalent icing thickness of a power transmission line according to claim 1, further comprising the steps of: collecting characteristic parameters of a wire to be tested and basic data of the wire, wherein the characteristic parameters and the basic data comprise: the outer diameter D of the wire, the sectional area S of the wire, the linear expansion coefficient alpha of the temperature of the wire, the dead weight W of the unit length of the wire, the final elasticity coefficient E of the wire and the length lambda of the insulator string of the tower 1 And the length lambda of the adjacent tower insulator chain 2 。
3. The method for monitoring the equivalent icing thickness of the power transmission line according to claim 2, wherein the set temperature t is as follows m At 5 ℃, the monitoring method further comprises the steps of: measuring known state parameters of the collection wire at a set temperature of 5 ℃ and under no external load, wherein the known state parameters comprise: center sag f of the gear under known conditions m The span l and the height difference h, the Gao Chajiao beta and the wire horizontal stress sigma m Wherein the Gao Chajiao
The horizontal stress of the wireWherein, gamma is the specific load of the wire in a known state, < + >>
4. A method for monitoring the equivalent icing thickness of a power transmission line according to any of claims 1-3, characterized by λ in different monitoring modes 1 、λ 2 、θ Bn 、θ Cn Is different in value, wherein
Lambda for the anti-monitoring mode 1 、λ 2 、θ Bn 、θ Cn All are directly assigned with 0;
lambda for the direct-withstand monitoring mode 2 、θ Cn Are all directly assigned 0, lambda 1 、θ Bn Is the actual monitoring value;
lambda for the straight-straight monitoring mode 1 、λ 2 、θ Bn 、θ Cn Are all actual monitoring values.
5. The method for monitoring the equivalent icing thickness of the power transmission line according to claim 4, wherein the inclination angle theta of the insulator string of the tower is as follows Bn And the inclination angle theta of the adjacent tower insulator string Cn And the polarity is negative when the insulator string is inclined to the monitoring gear side, and the polarity is positive otherwise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810892801.1A CN108692690B (en) | 2018-08-07 | 2018-08-07 | Power transmission line equivalent icing thickness monitoring system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810892801.1A CN108692690B (en) | 2018-08-07 | 2018-08-07 | Power transmission line equivalent icing thickness monitoring system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108692690A CN108692690A (en) | 2018-10-23 |
| CN108692690B true CN108692690B (en) | 2024-03-19 |
Family
ID=63841237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810892801.1A Active CN108692690B (en) | 2018-08-07 | 2018-08-07 | Power transmission line equivalent icing thickness monitoring system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108692690B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111442752B (en) * | 2020-03-26 | 2021-11-19 | 广州长川科技有限公司 | Method for monitoring equivalent icing thickness of power transmission line |
| CN111879275A (en) * | 2020-07-31 | 2020-11-03 | 国网四川省电力公司电力科学研究院 | Online monitoring device and method for icing of power transmission line |
| CN112484779B (en) * | 2020-11-24 | 2022-08-16 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Inclination angle icing monitoring method under stress mode of power line tower |
| CN113868590B (en) * | 2021-08-27 | 2024-07-02 | 南方电网科学研究院有限责任公司 | Method and device for measuring and calculating running temperature of lead, storage medium and terminal equipment |
| CN114354050B (en) * | 2021-12-07 | 2024-05-17 | 贵州电网有限责任公司 | Power transmission line deicing process monitoring method |
| CN114689005B (en) * | 2022-05-06 | 2022-10-04 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Icing monitoring method under uneven icing working condition |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101556195A (en) * | 2009-03-26 | 2009-10-14 | 杭州海康雷鸟信息技术有限公司 | Real-time monitoring method of ice coated on overhead transmission line conductor and system |
| CN103017714A (en) * | 2012-12-10 | 2013-04-03 | 西安工程大学 | Online monitoring system and monitoring method for equivalent icing thicknesses of power transmission lines |
| CN106248022A (en) * | 2016-07-21 | 2016-12-21 | 国网山西省电力公司电力科学研究院 | Electric power line ice-covering thickness monitoring system and monitoring method thereof |
| CN208398843U (en) * | 2018-08-07 | 2019-01-18 | 杭州一益信息技术有限公司 | A kind of transmission line of electricity equivalence ice covering thickness monitoring system |
-
2018
- 2018-08-07 CN CN201810892801.1A patent/CN108692690B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101556195A (en) * | 2009-03-26 | 2009-10-14 | 杭州海康雷鸟信息技术有限公司 | Real-time monitoring method of ice coated on overhead transmission line conductor and system |
| CN103017714A (en) * | 2012-12-10 | 2013-04-03 | 西安工程大学 | Online monitoring system and monitoring method for equivalent icing thicknesses of power transmission lines |
| CN106248022A (en) * | 2016-07-21 | 2016-12-21 | 国网山西省电力公司电力科学研究院 | Electric power line ice-covering thickness monitoring system and monitoring method thereof |
| CN208398843U (en) * | 2018-08-07 | 2019-01-18 | 杭州一益信息技术有限公司 | A kind of transmission line of electricity equivalence ice covering thickness monitoring system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108692690A (en) | 2018-10-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108692690B (en) | Power transmission line equivalent icing thickness monitoring system and method | |
| CN107328513B (en) | Online tension detector for high-voltage cable | |
| CN104897993B (en) | A kind of overhead transmission line current-carrying capacity appraisal procedure | |
| CN105441980A (en) | Online monitoring device for anode current distribution of aluminum electrolysis cell and monitoring method of online monitoring device | |
| CN109060214B (en) | Wire stress monitoring method under unbalanced tension working condition | |
| CN109799053B (en) | Power transmission equipment dynamic characteristic analysis method | |
| CN207963781U (en) | A kind of measuring device for measuring main rope of suspension bridge Datum Strand absolute altitude | |
| CN113112757B (en) | Ground wire specific load change quantity measuring method, system, device and storage medium | |
| CN116564045A (en) | Power transmission line windage yaw disaster early warning device based on electric power microclimate | |
| CN110986881A (en) | Power transmission line icing on-line monitoring system based on meteorological temperature | |
| CN117232408A (en) | Device and method for monitoring icing thickness of transmission line wire | |
| CN116718161A (en) | Overhead line sag state estimation system and method based on reinforcement learning algorithm | |
| CN115060215A (en) | Overhead transmission line icing thickness calculation method based on sag change | |
| CN208398843U (en) | A kind of transmission line of electricity equivalence ice covering thickness monitoring system | |
| CN110645939A (en) | System and method for dynamically predicting relative vertical distance between two wires | |
| CN114034277A (en) | Intelligent monitoring device and method for axial strain of oil and gas pipeline | |
| CN208155462U (en) | Wind power generation stepped movable type conductor rail thermal detector | |
| CN110110940B (en) | Method for forecasting height and wind speed of power transmission line | |
| Nie et al. | On-line monitoring system for icing state of overhead transmission line | |
| CN108759653B (en) | Wind generating set load strain monitoring device based on eddy current sensor | |
| CN113267231B (en) | Underground water level monitoring device and monitoring method thereof | |
| CN107664099A (en) | The radio communication type vertical axis wind power generation monitoring device that degree containing dynamical health differentiates | |
| CN217179596U (en) | System capable of monitoring deformation of framework support and foundation of traction power transformation | |
| CN220542018U (en) | Contact line on-line measuring instrument | |
| CN114997759B (en) | Heat supply pipeline support and hanger stability early warning method and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhu Yimin Inventor after: Zhou Ran Inventor after: Huang Liang Inventor after: Zhou Hui Inventor after: Lin Zhenglei Inventor before: Zhu Yimin Inventor before: Zhou Ran Inventor before: Zhang Liqian Inventor before: Dai Zeping Inventor before: Zhou Yingying |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |