CN113686286A - Method, device and system for monitoring icing of continuous shield lead of strain section of power transmission line - Google Patents
Method, device and system for monitoring icing of continuous shield lead of strain section of power transmission line Download PDFInfo
- Publication number
- CN113686286A CN113686286A CN202110834496.2A CN202110834496A CN113686286A CN 113686286 A CN113686286 A CN 113686286A CN 202110834496 A CN202110834496 A CN 202110834496A CN 113686286 A CN113686286 A CN 113686286A
- Authority
- CN
- China
- Prior art keywords
- sides
- tower
- associated tower
- lead
- icing
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 45
- 230000005540 biological transmission Effects 0.000 title claims abstract description 35
- 238000012544 monitoring process Methods 0.000 title claims abstract description 33
- 239000004020 conductor Substances 0.000 claims abstract description 39
- 239000011248 coating agent Substances 0.000 claims abstract description 20
- 238000000576 coating method Methods 0.000 claims abstract description 20
- 239000012212 insulator Substances 0.000 claims abstract description 17
- 238000004364 calculation method Methods 0.000 claims description 43
- 230000008859 change Effects 0.000 claims description 28
- 238000003860 storage Methods 0.000 claims description 9
- 239000000725 suspension Substances 0.000 claims description 5
- 238000012806 monitoring device Methods 0.000 claims description 3
- 239000012211 strain insulator Substances 0.000 claims 2
- 238000005303 weighing Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 9
- 238000004590 computer program Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Images
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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/11—Complex mathematical operations for solving equations, e.g. nonlinear equations, general mathematical optimization problems
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Pure & Applied Mathematics (AREA)
- Mathematical Optimization (AREA)
- Mathematical Analysis (AREA)
- Computational Mathematics (AREA)
- Data Mining & Analysis (AREA)
- Theoretical Computer Science (AREA)
- Operations Research (AREA)
- Algebra (AREA)
- Databases & Information Systems (AREA)
- Software Systems (AREA)
- General Engineering & Computer Science (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a method, a device and a system for monitoring ice coating of continuous-grade wires of a strain section of a power transmission line, wherein the method comprises the steps of obtaining the lengths of the wires on two sides of an associated tower; calculating the horizontal stress of the wires on the two sides of the associated tower in a vertical plane based on the lengths of the wires on the two sides of the associated tower, and obtaining the vertical span of the associated tower; acquiring a windage yaw angle parameter, and calculating the length of a lead corresponding to the vertical span of the associated tower in a windage yaw plane; acquiring a tension value and an inclination angle born by the insulator string, and calculating the unit length load of the conductor after icing by combining the length of the conductor corresponding to the vertical span of the associated tower in a windage yaw plane; and calculating the difference value of the load per unit length and the dead load per unit length of the lead to obtain the icing load per unit length of the lead, and calculating the equivalent icing thickness of the lead. The method can calculate the equivalent ice coating thickness of the wire connected with the tangent tower, and expands the application range of monitoring the ice coating of the wire by a weighing method.
Description
Technical Field
The invention belongs to the technical field of monitoring of icing load of a power transmission line, and particularly relates to a method, a device and a system for monitoring icing of a tension-resistant section continuous-grade wire of the power transmission line.
Background
If the transmission line automatically falls off after being coated with ice, the leads can collide with each other, and the line is tripped. Impact force and impact load can be generated at the suspension point of the lead, so that the strand of the lead is broken and the lead is broken. If the ice coated on the transmission line does not fall off and continuously increases, the tension of the wire can be increased, and the wire can be broken after the tension and the load exceed the mechanical strength of the hardware fitting. The tension of the conducting wire is increased, the torque and the load of each part of the tower and the tower foundation can be increased, the load exceeds a certain limit value of the mechanical strength of the tower, the tower foundation can be lowered, the tower can be bent and inclined, and some parts of the tower can be broken or even fall down.
The faults caused by line icing are potential threats to the power grid for a long time, and the safe operation of the power grid is influenced. When the fault occurs, the fault line cannot be rapidly repaired under the influence of factors such as weather and traffic, so that a user has long-time power failure, the daily life and social order of the user are influenced, and serious economic loss is caused.
Monitoring the icing of the transmission line by adopting an icing monitoring system is an important method for dealing with the faults at present. The icing monitoring system is generally composed of various sensors, a communication network and a master station system. The most common monitoring methods used today are: and collecting field data by adopting a tension sensor and an angle sensor, calculating the icing load of the lead by using a weighing method, and calculating the equivalent icing thickness of the lead. The length of a wire connected with a tangent tower needs to be known by the existing weighing method, and in the practical engineering application of monitoring the icing of the power transmission line, the length of the wire is often unknown due to the reasons of design data loss, data failure in interconnection and intercommunication and the like, so that the application range of the weighing method in the monitoring of the icing of the power transmission line is limited. In addition, in the prior art, the influence of wind load on the change of the length of the wire is not considered in the process of calculating the equivalent icing thickness of the wire, so that the accuracy of the calculated equivalent icing thickness of the wire is low.
Disclosure of Invention
Aiming at the problems, the invention provides a method, a device and a system for monitoring ice coating of a continuous-gear lead in a strain section of a power transmission line, which can calculate the equivalent ice coating thickness of a lead connected with a tangent tower and expand the application range of monitoring the ice coating of the lead by a weighing method.
In order to achieve the technical purpose and achieve the technical effects, the invention is realized by the following technical scheme:
in a first aspect, the invention provides a method for monitoring icing on a continuous-grade wire of a strain section of a power transmission line, which comprises the following steps:
acquiring the lengths of the wires on two sides of the associated tower;
calculating the horizontal stress of the wires on the two sides of the associated tower in a vertical plane based on the lengths of the wires on the two sides of the associated tower, and further obtaining the vertical span of the associated tower;
acquiring a windage yaw angle parameter, and calculating the length of a lead corresponding to the vertical span of the associated tower in a windage yaw plane;
acquiring a tension value and an inclination angle born by the insulator string, and calculating the unit length load of the conductor after icing by combining the length of the conductor corresponding to the vertical span of the associated tower in a windage yaw plane;
and calculating the difference value of the load per unit length and the dead load per unit length of the lead to obtain the icing load per unit length of the lead, and further calculating the equivalent icing thickness of the lead.
Optionally, the method for obtaining the lengths of the wires on the two sides of the associated tower includes: and calculating the length change rate of the wires on the two sides of the associated tower, and further obtaining the lengths of the wires on the two sides of the associated tower.
Optionally, the length change rate of the wires on the two sides of the associated tower is obtained by the following calculation formula:
wherein alpha islFor relating the length change rate of the wires on two sides of the tower, M is a calculation interval, k is a calculation interval serial number, and k is [ l/M ]]+1；αkAnd calculating the length change rate of the conducting wire at the initial position of the interval kth when the height difference is constant, wherein l is the span between adjacent towers.
Optionally, when h/l is less than or equal to a preset value, the change rate α of the length of the wire at the starting position of the kth calculation intervalkCalculated by the following formula:
wherein K is a safety factor, sigmapThe breaking force of the lead is shown, beta is the height difference angle of adjacent poles and towers, and gamma is the specific load of the lead in the vertical direction.
Optionally, the lengths of the wires on the two sides of the associated tower are calculated by the following formula:
wherein l is the span between adjacent towers, h is the altitude difference of the wire suspension points of the adjacent towers, and alphalThe length change rate of the wires on the two sides of the associated tower is obtained.
Optionally, the horizontal stress of the wires on the two sides of the associated tower in the vertical plane is calculated by the following formula:
wherein σOb、σOcRespectively the horizontal stress of the wires at the two sides of the associated tower in the vertical plane lb、lcRespectively associated with the span, beta, of both sides of the towerb、βcRespectively relating to the height difference angle S of the span on both sides of the towerb、ScThe lengths of the wires on the two sides of the associated tower are respectively.
Optionally, the vertical span of the associated tower is calculated by the following formula:
lH＝l1+l2
wherein lHFor associating the vertical span, h, of the towerb、hcFor relating the altitude difference between the tower and the towers at both sides, sigmaOb、σOcRespectively the horizontal stress of the wires at the two sides of the associated tower in the vertical plane lb、lcRespectively associated with the span, beta, of both sides of the towerb、βcRespectively relating to the height difference angle of the span at two sides of the associated tower.
Optionally, the length of the wire corresponding to the vertical span of the associated tower in the windage plane is obtained by the following calculation formula:
L′H＝L′1+L′2
wherein, L'HThe length of a corresponding wire of the vertical span of the associated tower in the windage yaw plane is defined, and eta is a windage yaw angle.
Optionally, the load per unit length of the conductor after being coated with ice is obtained by the following calculation formula:
wherein q isiceLoad per unit length after the conductor is coated with ice, F is tensile force borne by the insulator string, theta is the inclination angle of the insulator string in the direction along the line, G is the dead weight of the insulator string and the hardware, n is the number of the split conductors, q is the number of the split conductors0Is the dead weight load of the wire per unit length, L'HThe length of a corresponding wire of the vertical span of the associated tower in the windage yaw plane is defined, and eta is a windage yaw angle.
Optionally, the equivalent ice coating thickness of the conductor is obtained by the following calculation formula:
wherein g is a gravitational constant, ρ0Ice density of the rime, D diameter of the wire, qiceThe unit length load of the conductor after ice coating.
In a second aspect, the present invention provides an ice coating monitoring device for a strain section continuous shielding wire of a power transmission line, comprising:
the acquisition module is used for acquiring the lengths of the wires on the two sides of the associated tower;
the first calculation module is used for calculating the horizontal stress of the wires on the two sides of the associated tower in a vertical plane based on the lengths of the wires on the two sides of the associated tower so as to obtain the vertical span of the associated tower;
the second calculation module is used for acquiring the windage yaw angle parameter and calculating the length of a wire corresponding to the vertical span of the associated tower in a windage yaw plane;
the third calculation module is used for acquiring a tension value and an inclination angle born by the insulator string, and calculating the unit length load of the conductor after icing by combining the length of the conductor corresponding to the vertical span of the associated tower in a windage yaw plane;
and the fourth calculation module is used for calculating the difference value between the load per unit length and the dead load per unit length of the lead to obtain the icing load per unit length of the lead, and further calculating the equivalent icing thickness of the lead.
Optionally, the method for obtaining the lengths of the wires on the two sides of the associated tower includes: and calculating the length change rate of the wires on the two sides of the associated tower, and further obtaining the lengths of the wires on the two sides of the associated tower.
In a third aspect, the present invention provides a system for monitoring ice coating on a continuous-grade wire of a strain section of a power transmission line, comprising: a storage medium and a processor;
the storage medium is used for storing instructions;
the processor is configured to operate in accordance with the instructions to perform the method according to any one of the first aspects.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a method, a device and a system for monitoring icing of a continuous-grade wire of a tension resistant section of a power transmission line aiming at the condition that the length of a wire connected with a tangent tower in the continuous grade of the tension resistant section of the power transmission line, which is easy to ice, is unknown, and the length of the wire on two sides of an associated tower is firstly obtained; calculating the horizontal stress of the wires on the two sides of the associated tower in a vertical plane based on the lengths of the wires on the two sides of the associated tower, and further obtaining the vertical span of the associated tower; acquiring a windage yaw angle parameter, and calculating the corresponding length of the vertical span of the associated tower in a windage yaw plane; acquiring a tension value and an inclination angle born by the insulator string, and calculating the unit length load of the conductor after icing by combining the length of the conductor corresponding to the vertical span of the associated tower in a windage yaw plane; and calculating the difference value between the load per unit length and the dead load per unit length of the lead to obtain the icing load per unit length of the lead, and further calculating the equivalent icing thickness of the lead, so that the influence of wind load on the change of the lead length is fully considered, the calculation accuracy of the equivalent icing thickness of the lead is high, and the application range of monitoring the icing of the lead by a weighing method is expanded.
Furthermore, the invention also provides a novel method for acquiring the lengths of the wires on the two sides of the associated tower, and the equivalent icing thickness of the wires under the condition of unknown length of the wires can be calculated.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic flow chart of a method for monitoring ice coating on a continuous-guard wire of a strain section of a power transmission line according to the present invention;
FIG. 2 is a schematic view of a strain section continuous rail;
FIG. 3 is a schematic view of the vertical plane and windage plane;
fig. 4 is a schematic diagram of parameters between three adjacent towers.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention.
The following detailed description of the principles of the invention is provided in connection with the accompanying drawings.
Example 1
The embodiment of the invention provides a method for monitoring ice coating of a continuous-grade wire of a strain section of a power transmission line, which specifically comprises the following steps:
(1) acquiring the lengths of the wires on two sides of the associated tower; the associated tower refers to a tower (generally, a straight tower) located at the middle position in the continuous three-base tower, and specifically refer to fig. 4;
(2) calculating the horizontal stress of the wires at the two sides of the associated tower in a vertical plane ABC (see figure 3 specifically) based on the lengths of the wires at the two sides of the associated tower, and further obtaining the vertical span of the associated tower;
(3) acquiring a windage yaw angle parameter, and calculating the length of a lead corresponding to the vertical span of the associated tower in a windage yaw plane AB 'C' (see fig. 3 in particular);
(4) acquiring a tension value and an inclination angle born by the insulator string, and calculating the unit length load of the conductor after icing by combining the length of the conductor corresponding to the vertical span of the associated tower in a windage yaw plane;
(5) and calculating the difference value of the load per unit length and the dead load per unit length of the lead to obtain the icing load per unit length of the lead, and further calculating the equivalent icing thickness of the lead.
In a specific implementation manner of the embodiment of the present invention, for a situation that a length of a conductor connected to a tangent tower in a continuous stage of an ice-prone tension-resistant section of a transmission line is unknown, lengths of conductors on two sides of the associated tower may be obtained by using the following method:
and calculating the length change rate of the wires on the two sides of the associated tower, and further obtaining the lengths of the wires on the two sides of the associated tower.
The length change rate of the wires on the two sides of the associated tower is obtained through the following calculation formula:
wherein alpha islFor relating the length change rate of the wires on two sides of the tower, M is a calculation interval, k is a calculation interval serial number, and k is [ l/M ]]+1；αkAnd calculating the length change rate of the conducting wire at the initial position of the interval kth when the height difference is constant, wherein l is the span between adjacent towers.
When h/l is less than or equal to a preset value, the length change rate alpha of the lead at the starting position of the kth calculation intervalkCalculated by the following formula:
wherein K is a safety factor, sigmapThe preset value can be set to 0.25 in the practical application process, wherein beta is the breaking force of the lead, beta is the height difference angle of adjacent towers, and gamma is the specific load of the lead in the vertical direction.
In the case that the length of the wire connected to the tower in the continuous strain section (see fig. 2) is unknown, for this reason, the embodiment of the present invention proposes that the length of the wire on both sides of the associated tower is calculated by the following formula:
wherein l is the span between adjacent towers, h is the altitude difference of the wire suspension points of the adjacent towers, and alphalThe length change rate of the wires on the two sides of the associated tower is obtained.
In a specific implementation manner of the embodiment of the present invention, the horizontal stress of the wires at two sides of the associated tower in the vertical plane is calculated by the following formula:
wherein σOb、σOcRespectively the horizontal stress of the wires at the two sides of the associated tower in the vertical plane lb、lcRespectively associated with the span, beta, of both sides of the towerb、βcRespectively relating to the height difference angle S of the span on both sides of the towerb、ScThe lengths of the wires on the two sides of the associated tower are respectively.
The vertical span of the associated tower is obtained by calculation according to the following formula:
lH＝l1+l2
wherein lHFor associating the vertical span, h, of the towerb、hcFor relating the altitude difference between the tower and the towers at both sides, sigmaOb、σOcRespectively the horizontal stress of the wires at the two sides of the associated tower in the vertical plane lb、lcRespectively associated with the span, beta, of both sides of the towerb、βcRespectively relating to the height difference angle of the span at two sides of the associated tower.
The length of the lead corresponding to the vertical span of the associated tower in the windage yaw plane is obtained through the following calculation formula:
L′H＝L′1+L′2
wherein, L'HThe length of a corresponding wire of the vertical span of the associated tower in the windage yaw plane is defined, and eta is a windage yaw angle.
In a specific implementation manner of the embodiment of the present invention, the load per unit length of the conductor after being coated with ice is obtained by the following calculation formula:
wherein q isiceThe unit length load of the conductor after being coated with ice is represented by F, theta, and GAnd the self weight of the hardware, n is the number of the split conductors, q0Is the dead weight load of the wire per unit length, L'HAnd eta is the wind deflection angle, and is the corresponding length of the vertical span of the associated tower in the wind deflection plane.
The equivalent ice coating thickness of the wire is obtained by the following calculation formula:
wherein g is a gravitational constant, ρ0Ice density of the rime, D diameter of the wire, qiceThe unit length load of the conductor after ice coating.
Example 2
Based on the same inventive concept as embodiment 1, the embodiment of the invention provides an ice coating monitoring device for a tension-resistant section continuous-grade wire of a power transmission line, which comprises:
the acquisition module is used for acquiring the lengths of the wires on the two sides of the associated tower;
the first calculation module is used for calculating the horizontal stress of the wires on the two sides of the associated tower in a vertical plane based on the lengths of the wires on the two sides of the associated tower so as to obtain the vertical span of the associated tower;
the second calculation module is used for acquiring the windage yaw angle parameter and calculating the length of a wire corresponding to the vertical span of the associated tower in a windage yaw plane;
the third calculation module is used for acquiring a tension value and an inclination angle born by the insulator string, and calculating the unit length load of the conductor after icing by combining the length of the conductor corresponding to the vertical span of the associated tower in a windage yaw plane;
and the fourth calculation module is used for calculating the difference value between the load per unit length and the dead load per unit length of the lead to obtain the icing load per unit length of the lead, and further calculating the equivalent icing thickness of the lead.
In a specific implementation manner of the embodiment of the present invention, for a situation that a length of a conductor connected to a tangent tower in a continuous stage of an ice-prone tension-resistant section of a transmission line is unknown, lengths of conductors on two sides of the associated tower may be obtained by using the following method:
and calculating the length change rate of the wires on the two sides of the associated tower, and further obtaining the lengths of the wires on the two sides of the associated tower.
The length change rate of the wires on the two sides of the associated tower is obtained through the following calculation formula:
wherein alpha islFor relating the length change rate of the wires on two sides of the tower, M is a calculation interval, k is a calculation interval serial number, and k is [ l/M ]]+1；αkAnd calculating the length change rate of the conducting wire at the initial position of the interval kth when the height difference is constant, wherein l is the span between adjacent towers.
When h/l is less than or equal to a preset value, the length change rate alpha of the lead at the starting position of the kth calculation intervalkCalculated by the following formula:
wherein K is a safety factor, sigmapThe preset value can be set to 0.25 in the practical application process, wherein beta is the breaking force of the lead, beta is the height difference angle of adjacent towers, and gamma is the specific load of the lead in the vertical direction.
In the case that the length of the wire connected to the tower in the continuous strain section (see fig. 2) is unknown, for this reason, the embodiment of the present invention proposes that the length of the wire on both sides of the associated tower is calculated by the following formula:
wherein l is the span between adjacent towers, h is the altitude difference of the wire suspension points of the adjacent towers, and alphalThe length change rate of the wires on the two sides of the associated tower is obtained.
In a specific implementation manner of the embodiment of the present invention, the horizontal stress of the wires at two sides of the associated tower in the vertical plane is calculated by the following formula:
wherein σOb、σOcRespectively the horizontal stress of the wires at the two sides of the associated tower in the vertical plane lb、lcRespectively associated with the span, beta, of both sides of the towerb、βcRespectively relating to the height difference angle S of the span on both sides of the towerb、ScThe lengths of the wires on two sides of the associated tower (namely the lengths of the wires on the b gear and the c gear on two sides of the associated tower) are respectively shown.
The vertical span of the associated tower is obtained by calculation according to the following formula:
lH＝l1+l2
wherein lHFor associating the vertical span, h, of the towerb、hcFor relating the altitude difference between the tower and the towers at both sides, sigmaOb、σOcRespectively the horizontal stress of the wires at the two sides of the associated tower in the vertical plane lb、lcRespectively the span at two sides of the associated tower (i.e. the span of the b-gear and the c-gear at two sides of the associated tower), betab、βcRespectively relating to the height difference angle of the span at two sides of the associated tower.
The length of the lead corresponding to the vertical span of the associated tower in the windage yaw plane is obtained through the following calculation formula:
L′H＝L′1+L′2
wherein, L'HThe length of a corresponding wire of the vertical span of the associated tower in the windage yaw plane is defined, and eta is a windage yaw angle.
In a specific implementation manner of the embodiment of the present invention, the load per unit length of the conductor after being coated with ice is obtained by the following calculation formula:
wherein q isiceLoad per unit length after the conductor is coated with ice, F is tensile force borne by the insulator string, theta is the inclination angle of the insulator string in the direction along the line, G is the dead weight of the insulator string and the hardware, n is the number of the split conductors, q is the number of the split conductors0Is the dead weight load of the wire per unit length, L'HAnd eta is the wind deflection angle, and is the corresponding length of the vertical span of the associated tower in the wind deflection plane.
The equivalent ice coating thickness of the wire is obtained by the following calculation formula:
wherein g is a gravitational constant, p0Ice density of the rime, D diameter of the wire, qiceThe unit length load of the conductor after ice coating.
Example 3
Based on the same inventive concept as embodiment 1, the embodiment of the invention provides an ice coating monitoring system for a tension-resistant section continuous-grade wire of a power transmission line, which comprises: a storage medium and a processor;
the storage medium is used for storing instructions;
the processor is configured to operate in accordance with the instructions to perform the method of any of embodiment 1.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (13)
1. A method for monitoring icing of a tension-resistant section continuous-gear lead of a power transmission line is characterized by comprising the following steps:
acquiring the lengths of the wires on two sides of the associated tower;
calculating the horizontal stress of the wires on the two sides of the associated tower in a vertical plane based on the lengths of the wires on the two sides of the associated tower, and further obtaining the vertical span of the associated tower;
acquiring a windage yaw angle parameter, and calculating the corresponding length of the vertical span of the associated tower in a windage yaw plane;
acquiring a tension value and an inclination angle born by the insulator string, and calculating the unit length load of the conductor after icing by combining the length of the conductor corresponding to the vertical span of the associated tower in a windage yaw plane;
and calculating the difference value of the load per unit length and the dead load per unit length of the lead to obtain the icing load per unit length of the lead, and further calculating the equivalent icing thickness of the lead.
2. The method for monitoring icing on the continuous-shift lead of the tension-resistant section of the power transmission line according to claim 1, wherein the method for acquiring the lengths of the leads on two sides of the associated tower comprises the following steps:
and calculating the length change rate of the wires on the two sides of the associated tower, and further obtaining the lengths of the wires on the two sides of the associated tower.
3. The method for monitoring icing on the continuous-shift lead of the tension-resistant section of the power transmission line according to claim 2, wherein the length change rate of the leads on two sides of the associated tower is obtained by the following calculation formula:
wherein alpha islFor relating the length change rate of the wires on two sides of the tower, M is a calculation interval, k is a calculation interval serial number, and k is [ l/M ]]+1；αkAnd calculating the length change rate of the conducting wire at the initial position of the interval kth when the height difference is constant, wherein l is the span between adjacent towers.
4. The method for monitoring icing on the continuous-grade wire of the tension-resistant section of the power transmission line according to claim 3, wherein when h/l is less than or equal to a preset value, the change rate of the length of the wire at the initial position of the kth calculation interval is alphakCalculated by the following formula:
wherein, for safety factor, σpThe breaking force of the lead is shown, beta is the height difference angle of adjacent poles and towers, and gamma is the specific load of the lead in the vertical direction.
5. The method for monitoring icing on the continuous-shift lead of the tension-resistant section of the power transmission line according to claim 1, wherein the lengths of the leads on two sides of the associated tower are calculated by the following formula:
whereinL is the span between adjacent towers, h is the altitude difference of the wire suspension points of adjacent towers, alphalThe length change rate of the wires on the two sides of the associated tower is obtained.
6. The method for monitoring icing on the continuous-shift lead of the tension-resistant section of the power transmission line according to claim 1, wherein the horizontal stress of the leads at two sides of the associated tower in a vertical plane is calculated by the following formula:
wherein σOb、σOcRespectively the horizontal stress of the wires at the two sides of the associated tower in the vertical plane lb、lcRespectively associated with the span, beta, of both sides of the towerb、βcRespectively relating to the height difference angle S of the span on both sides of the towerb、ScThe lengths of the wires on the two sides of the associated tower are respectively.
7. The method for monitoring icing on the continuous-shift lead of the tension-resistant section of the power transmission line according to claim 1, wherein the vertical span of the associated tower is calculated by the following formula:
lH＝l1+l2
wherein lHFor linking towersVertical span ofb、hcFor relating the altitude difference between the tower and the towers at both sides, sigmaOb、σOcRespectively the horizontal stress of the wires at the two sides of the associated tower in the vertical plane lb、lcRespectively associated with the span, beta, of both sides of the towerb、βcRespectively relating to the height difference angle of the span at two sides of the associated tower.
8. The method for monitoring ice coating on the continuous shielding lead of the tension-resistant section of the power transmission line according to claim 7, characterized by comprising the following steps of: the length of the lead corresponding to the vertical span of the associated tower in the windage yaw plane is obtained through the following calculation formula:
L′H＝L′1+L′2
wherein, L'HThe length of a corresponding wire of the vertical span of the associated tower in the windage yaw plane is defined, and eta is a windage yaw angle.
9. The method for monitoring the icing of the continuous-grade lead of the tension-resistant section of the power transmission line according to claim 1, wherein the load per unit length of the lead after icing is obtained by the following calculation formula:
wherein q isiceLoad per unit length after the conductor is coated with ice, F is tensile force borne by the insulator string, theta is the inclination angle of the insulator string in the direction along the line, G is the dead weight of the insulator string and the hardware, n is the number of the split conductors, q is the number of the split conductors0Is the self-weight of the wire per unit lengthOn L'HThe length of a corresponding wire of the vertical span of the associated tower in the windage yaw plane is defined, and eta is a windage yaw angle.
10. The method for monitoring the icing of the continuous-grade wire of the tension-resistant section of the power transmission line according to claim 1, wherein the equivalent icing thickness of the wire is obtained by the following calculation formula:
wherein g is a gravitational constant, ρ0Ice density of the rime, wire diameter, qiceThe unit length load of the conductor after ice coating.
11. The utility model provides a continuous shelves wire icing monitoring devices of transmission line strain insulator section which characterized in that includes:
the acquisition module is used for acquiring the lengths of the wires on the two sides of the associated tower;
the first calculation module is used for calculating the horizontal stress of the wires on the two sides of the associated tower in a vertical plane based on the lengths of the wires on the two sides of the associated tower so as to obtain the vertical span of the associated tower;
the second calculation module is used for acquiring the windage yaw angle parameter and calculating the length of a wire corresponding to the vertical span of the associated tower in a windage yaw plane;
the third calculation module is used for acquiring a tension value and an inclination angle born by the insulator string, and calculating the unit length load of the conductor after icing by combining the length of the conductor corresponding to the vertical span of the associated tower in a windage yaw plane;
and the fourth calculation module is used for calculating the difference value between the load per unit length and the dead load per unit length of the lead to obtain the icing load per unit length of the lead, and further calculating the equivalent icing thickness of the lead.
12. The device for monitoring icing on the continuous-shift lead of the tension-resistant section of the power transmission line according to claim 11, wherein the method for acquiring the lengths of the leads on two sides of the associated tower comprises the following steps:
and calculating the length change rate of the wires on the two sides of the associated tower, and further obtaining the lengths of the wires on the two sides of the associated tower.
13. The utility model provides a continuous shelves wire icing monitoring system of transmission line strain insulator section which characterized in that includes: a storage medium and a processor;
the storage medium is used for storing instructions;
the processor is configured to operate in accordance with the instructions to perform the method of any of claims 1-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110834496.2A CN113686286A (en) | 2021-07-23 | 2021-07-23 | Method, device and system for monitoring icing of continuous shield lead of strain section of power transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110834496.2A CN113686286A (en) | 2021-07-23 | 2021-07-23 | Method, device and system for monitoring icing of continuous shield lead of strain section of power transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113686286A true CN113686286A (en) | 2021-11-23 |
Family
ID=78577726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110834496.2A Pending CN113686286A (en) | 2021-07-23 | 2021-07-23 | Method, device and system for monitoring icing of continuous shield lead of strain section of power transmission line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113686286A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114689005A (en) * | 2022-05-06 | 2022-07-01 | 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 (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101907456A (en) * | 2010-06-30 | 2010-12-08 | 华南理工大学 | Method for calculating thickness and weight of ice coating on overhead transmission line of tangent tower |
| KR20140075100A (en) * | 2012-12-10 | 2014-06-19 | 현대중공업 주식회사 | Estimation of ice load system on the power transmission line using smart sensor |
| CN104236504A (en) * | 2014-08-28 | 2014-12-24 | 上海电力学院 | Power transmission line equivalent icing thickness monitoring method |
| CN107514976A (en) * | 2017-08-24 | 2017-12-26 | 国家电网公司 | Power circuit icing monitoring method and terminal device |
| CN108692690A (en) * | 2018-08-07 | 2018-10-23 | 杭州益信息技术有限公司 | A kind of transmission line of electricity equivalence ice covering thickness monitoring system and method |
| RU2692147C1 (en) * | 2017-12-21 | 2019-06-21 | Федеральное государственное бюджетное учреждение науки Институт машиноведения им. А.А. Благонравова Российской академии наук (ИМАШ РАН) | Adaptive mobile spatial robot-manipulator for servicing lap and method of servicing electrical transmission lines by means of an adaptive mobile spatial robot-manipulator |
| CN111967147A (en) * | 2020-07-30 | 2020-11-20 | 华南理工大学 | Method for calculating key parameters of ice coating growth model of overhead transmission line |
| CN112100830A (en) * | 2020-08-31 | 2020-12-18 | 季龙三 | Method for calculating tension of iron tower of power transmission line |
| CN112484779A (en) * | 2020-11-24 | 2021-03-12 | 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 |
-
2021
- 2021-07-23 CN CN202110834496.2A patent/CN113686286A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101907456A (en) * | 2010-06-30 | 2010-12-08 | 华南理工大学 | Method for calculating thickness and weight of ice coating on overhead transmission line of tangent tower |
| KR20140075100A (en) * | 2012-12-10 | 2014-06-19 | 현대중공업 주식회사 | Estimation of ice load system on the power transmission line using smart sensor |
| CN104236504A (en) * | 2014-08-28 | 2014-12-24 | 上海电力学院 | Power transmission line equivalent icing thickness monitoring method |
| CN107514976A (en) * | 2017-08-24 | 2017-12-26 | 国家电网公司 | Power circuit icing monitoring method and terminal device |
| RU2692147C1 (en) * | 2017-12-21 | 2019-06-21 | Федеральное государственное бюджетное учреждение науки Институт машиноведения им. А.А. Благонравова Российской академии наук (ИМАШ РАН) | Adaptive mobile spatial robot-manipulator for servicing lap and method of servicing electrical transmission lines by means of an adaptive mobile spatial robot-manipulator |
| CN108692690A (en) * | 2018-08-07 | 2018-10-23 | 杭州益信息技术有限公司 | A kind of transmission line of electricity equivalence ice covering thickness monitoring system and method |
| CN111967147A (en) * | 2020-07-30 | 2020-11-20 | 华南理工大学 | Method for calculating key parameters of ice coating growth model of overhead transmission line |
| CN112100830A (en) * | 2020-08-31 | 2020-12-18 | 季龙三 | Method for calculating tension of iron tower of power transmission line |
| CN112484779A (en) * | 2020-11-24 | 2021-03-12 | 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 |
Non-Patent Citations (1)
| Title |
|---|
| 姚陈果;毛峰;许道林;刘孝全;周泽宏;崔玉家;: "不均匀覆冰输电塔线体系力学特性", 高电压技术, no. 12, pages 3084 - 3092 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114689005A (en) * | 2022-05-06 | 2022-07-01 | 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 |
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105740548B (en) | Transmission line of electricity wind shake calculation method under a kind of RANDOM WIND load | |
| CN111442752B (en) | Method for monitoring equivalent icing thickness of power transmission line | |
| CN101907456B (en) | Method for calculating thickness and weight of ice coating on overhead transmission line of tangent tower | |
| CN108876194A (en) | Power distribution network methods of risk assessment under a kind of typhoon disaster scene | |
| CN108512226B (en) | Method for evaluating resilience of power system under disaster | |
| AU2020399503B2 (en) | Method and apparatus for detecting yaw-to-wind abnormality, and device and storage medium thereof | |
| CN108008252B (en) | Power transmission line fault type diagnosis method and device | |
| CN113983987A (en) | Dynamic monitoring method, system and device for icing of power transmission line and storage medium | |
| CN111460389B (en) | Method for calculating galloping trip probability of ice-coated conductor | |
| CN107228646A (en) | A kind of equivalent ice covering thickness computational methods of transmission line of electricity | |
| CN103776492A (en) | OPGW condition monitoring system | |
| CN111859767A (en) | Power transmission line icing risk simulation evaluation method and device | |
| CN113686286A (en) | Method, device and system for monitoring icing of continuous shield lead of strain section of power transmission line | |
| CN116167609A (en) | Power system risk assessment method based on neural network model | |
| CN116050599A (en) | Line icing fault prediction method, system, storage medium and equipment | |
| CN112684294B (en) | Distribution network fault rush-repair positioning method based on dynamic influence of environment | |
| CN109784780B (en) | Method, device and equipment for evaluating toughness of power system | |
| CN113674512A (en) | Online monitoring and early warning system and method for live cross-over construction site | |
| CN115809836A (en) | Distribution network toughness planning method considering distributed energy storage emergency power supply capacity | |
| CN105160420A (en) | Method for predicting overhead line wind load outage probability | |
| CN112653242B (en) | Power transmission line monitoring system based on cloud platform service | |
| CN113701690B (en) | Equivalent icing thickness measuring method and system for straight line tower of equal-span power transmission and distribution line | |
| CN114842344A (en) | Method, system and equipment for calculating horizontal stress of wire in ice-free state of power transmission line | |
| CN115224692A (en) | Probabilistic load flow calculation method and system considering electro-thermal mechanics dynamics of overhead conductor | |
| CN113642221A (en) | Method for determining high-risk pole tower system according to height difference and span |
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 |