CN109190150B - Differentiation windproof evaluation method, device, equipment and medium for old line - Google Patents
Differentiation windproof evaluation method, device, equipment and medium for old line Download PDFInfo
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Abstract
The invention discloses a differentiated windproof evaluation method for old lines, which takes a wind speed recurrence period of 50 years as a reference, obtains load factors of wind speed recurrence periods of different ages, and determines the reliability levels of the recurrence periods corresponding to the load factors of the wind speed recurrence periods of different ages according to the load factors of the wind speed recurrence periods of different ages; extracting wind pressure uneven coefficients and wind load adjustment coefficients corresponding to different voltage levels from different design specifications; the wind pressure uneven coefficient and the wind load adjustment coefficient are obtained when wind load is calculated according to different voltage grades; calculating an equivalent factor of a tower line system according to the wind pressure uneven coefficient and the wind load adjustment coefficient; determining the reliability level of the corresponding equivalent factor according to the equivalent factor of the tower line system; and comparing the reliability level of the recurrence period with the reliability level of the equivalent factor to determine the reliability level of the tower line. And the wind resistance reliability of the transmission tower is effectively evaluated by adopting differential evaluation on the transmission towers adopting different design specifications.
Description
Technical Field
The invention relates to the technical field of engineering structure performance evaluation, in particular to a differential windproof evaluation method, device, equipment and medium for old lines.
Background
Due to different historical standards and different construction environments, existing lines have uneven wind resistance, and a large number of existing lines have insufficient wind resistance. According to the evaluation of the existing design system, the existing line has a higher proportion which does not meet the wind-resistant design requirement. The wind resistance reinforcement of the line not only relates to massive construction funds, but also relates to complicated economic, social and technical factors such as land acquisition, planning and reporting, power failure and the like, so that for the wind resistance evaluation and reinforcement modification of the existing line, the wind resistance of the line and the social and economic cost of power grid safety and reinforcement are required to be comprehensively considered, and the wind resistance design of the newly-built line is required to be more precise, so that a wind resistance standard based on the relatively precise evaluation of the wind resistance of the line and the difference between the line reinforcement and the line new construction is required to be researched and established, and the wind resistance evaluation, reinforcement and modification work of the existing line of the line is promoted.
It is therefore desirable to provide a method for evaluating a line based on differentiation.
Disclosure of Invention
In view of the above problems, the present invention aims to provide a differentiated windproof evaluation method for old lines, which adopts a differentiated evaluation method for transmission towers adopting different design specifications in consideration of the voltage level of the transmission tower, and can effectively evaluate the wind-resistant reliability of the transmission tower, so as to pertinently adopt a corresponding windproof reinforcement method to perform windproof reconstruction design.
In a first aspect, the invention provides a differentiated windproof evaluation method for old lines, which comprises the following steps:
taking a wind speed recurrence period of 50 years as a reference, and acquiring load factors of the wind speed recurrence periods of different ages;
determining the reliability levels of the different year wind speed recurrence periods in the recurrence period corresponding to the load factors of the different year wind speed recurrence periods according to the load factors of the different year wind speed recurrence periods;
extracting wind pressure uneven coefficients and wind load adjustment coefficients corresponding to different voltage levels from different design specifications; the wind pressure uneven coefficient and the wind load adjustment coefficient are obtained when wind load is calculated according to different voltage levels;
calculating an equivalent factor of a tower line system according to the wind pressure uneven coefficient and the wind load adjustment coefficient; the calculation formula of the equivalent factor of the tower line system is as follows: a = (α) Wire(s) ·β Thread +α Tower with a tower body ·β Tower with a tower body ) 2; wherein a is the equivalent factor of the tower line, alpha Thread Is the wind pressure non-uniform coefficient of the ground wire, alpha Tower with a tower body Is the wind pressure uneven coefficient beta of the tower Thread Adjusting the coefficient for the wind load of the ground wire; beta is a Tower with a tower body Adjusting the coefficient for the wind load of the tower;
determining the reliability level of the corresponding equivalent factor according to the equivalent factor of the tower line system;
comparing the reliability level of the recurrence period with the reliability level of the equivalent factor to determine the reliability level of the tower line system;
wherein, the obtaining the load factors of the wind speed recurrence periods of different ages by taking the wind speed recurrence period of 50 years as a benchmark comprises the following steps:
obtaining a reliability correlation degree calculation formula of the recurrence period according to the relational expression of the wind pressure and the recurrence period; wherein, the relational expression of the wind pressure and the reappearing period is xR = x10+ (x 100-x 10) (lnR/ln 10-1); wherein, xR is the basic wind pressure of R-year recurrence period; x10 is the basic wind pressure in 10-year recurrence period; x100 is the basic wind pressure in the 100-year recurrence period;
taking a wind speed recurrence period of 50 years as a reference, and acquiring load factors of the wind speed recurrence periods of different years according to a recurrence period reliability correlation calculation formula, wherein the load factors are as follows: xR/x50=1+ β (lnR-ln 50); wherein x50 is the basic wind pressure in the 50-year recurrence period;
in a first possible implementation manner of the first aspect, the method further includes:
acquiring reference reliability values of lines with different importance levels in the tower line system according to the importance levels of the lines;
when the reliability grade corresponding to the line is smaller than the reference reliability value, the line is marked as modified;
and when the reliability grade corresponding to the line is greater than the reference reliability value, marking the line as not needing to be modified.
In a second possible implementation form of the first aspect,
the comparing the reliability level of the recurrence period with the reliability level of the equivalent factor to obtain the reliability level of the tower line comprises:
obtaining comparison ranges corresponding to different reproduction period reliability levels in the reproduction period reliability levels;
and when the reliability level of the equivalent factor is detected to be in the comparison range, acquiring the reliability level of the tower line system according to the reliability level of the recurrence period corresponding to the comparison range.
With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the method further includes:
obtaining corresponding reliability evaluation according to the reliability grade; wherein the reliability assessment comprises being extremely unreliable, less reliable, substantially reliable, very reliable, and extremely reliable.
In a second aspect, an embodiment of the present invention provides an old line differential windproof evaluation device, including:
the load factor acquisition module is used for acquiring load factors of wind speed recurrence periods of different ages by taking the wind speed recurrence period of 50 years as a reference;
the recurrence period reliability grade acquisition module is used for determining the recurrence period reliability grade corresponding to the load factor of the different-age wind speed recurrence periods according to the load factor of the different-age wind speed recurrence periods;
the coefficient acquisition module is used for extracting wind pressure uneven coefficients and wind load adjustment coefficients corresponding to different voltage grades from different design specifications; the wind pressure uneven coefficient and the wind load adjustment coefficient are obtained when wind load is calculated according to different voltage levels;
the equivalent factor calculation module is used for calculating an equivalent factor of a tower line system according to the wind pressure uneven coefficient and the wind load adjustment coefficient; the calculation formula of the equivalent factor of the tower line system is as follows: a = (α) Thread ·β Thread +α Tower with a tower body ·β Tower with a tower body ) 2; wherein a is the equivalent factor of the tower line, alpha Wire(s) Is the wind pressure non-uniform coefficient of the ground wire, alpha Tower with a tower body Is the wind pressure uneven coefficient, beta, of the tower Thread Adjusting the coefficient for the wind load of the ground wire; beta is a Tower with a tower body Adjusting the coefficient for the wind load of the tower;
the equivalent factor reliability level acquisition module is used for determining the corresponding equivalent factor reliability level according to the equivalent factor of the tower line system;
the reliability level acquisition module of the tower line system is used for comparing the reliability level of the recurrence period with the reliability level of the equivalent factor to determine the reliability level of the tower line system;
wherein, the acquiring the load factors of the wind speed recurrence periods of different ages by taking the wind speed recurrence period of 50 years as a reference comprises the following steps:
obtaining a reliability correlation degree calculation formula of the recurrence period according to the relational expression of the wind pressure and the recurrence period; wherein, the relational expression of the wind pressure and the reappearing period is xR = x10+ (x 100-x 10) (lnR/ln 10-1); wherein, xR is the basic wind pressure of R-year recurrence period; x10 is the basic wind pressure in 10-year recurrence period; x100 is the basic wind pressure in the 100-year recurrence period;
taking a wind speed recurrence period of 50 years as a reference, and acquiring load factors of the wind speed recurrence periods of different years according to a recurrence period reliability correlation calculation formula, wherein the load factors are as follows: xR/x50=1+ β (lnR-ln 50); wherein x50 is the basic wind pressure in the 50-year recurrence period;
in a third aspect, an embodiment of the present invention provides an old line differential wind-prevention evaluation apparatus, which includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, and when the processor executes the computer program, the old line differential wind-prevention evaluation method as described above is implemented.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, where the computer-readable storage medium includes a stored computer program, where when the computer program runs, the apparatus in which the computer-readable storage medium is located is controlled to execute the old line differentiation windproof evaluation method described above.
One of the above technical solutions has the following advantages: taking a wind speed recurrence period of 50 years as a reference, acquiring load factors of wind speeds of different ages in the recurrence period, and determining the recurrence period reliability levels corresponding to the load factors of the wind speeds of different ages in the recurrence period according to the load factors of the wind speeds of different ages in the recurrence period; extracting wind pressure non-uniform coefficients and wind load adjustment coefficients corresponding to different voltage levels from different design specifications; the wind pressure uneven coefficient and the wind load adjustment coefficient are obtained when wind load is calculated according to different voltage levels; calculating an equivalent factor of a tower line system according to the wind pressure uneven coefficient and the wind load adjustment coefficient; determining the reliability level of the corresponding equivalent factor according to the equivalent factor of the tower line system; and comparing the reliability level of the recurrence period with the reliability level of the equivalent factor to determine the reliability level of the tower line system. The wind-proof reliability of the transmission tower can be effectively evaluated by taking the voltage grade of the transmission tower into consideration and adopting a differential evaluation method for the transmission towers adopting different design specifications, so that the wind-proof improvement design can be carried out by specifically adopting a corresponding wind-proof reinforcement method, the wind-proof reliability of different lines under different design specifications can be effectively given, a wind-proof improvement basis is provided for the coastal established transmission line, and the improvement can be carried out according to the principle and scientifically.
Drawings
Fig. 1 is a schematic flowchart of a differentiated wind-prevention evaluation method for an old line according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of an old line differentiation wind-prevention evaluation device according to a second embodiment of the present invention;
fig. 3 is a schematic diagram of an old line differential wind-proof evaluation device according to a third embodiment of the present invention.
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 obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
Example one
Referring to fig. 1, a schematic flow chart of a differential windproof evaluation method for old lines according to a first embodiment of the present invention;
s11, acquiring load factors of wind speed recurrence periods of different ages by taking the wind speed recurrence period of 50 years as a reference
S12, determining the reliability levels of the different annual wind speed recurrence periods corresponding to the load factors according to the load factors of the different annual wind speed recurrence periods;
s13, extracting wind pressure uneven coefficients and wind load adjustment coefficients corresponding to different voltage levels from different design specifications; the wind pressure uneven coefficient and the wind load adjustment coefficient are obtained when wind load is calculated according to different voltage levels;
s14, calculating an equivalent factor of a tower line system according to the wind pressure uneven coefficient and the wind load adjustment coefficient;
s15, determining the reliability level of the corresponding equivalent factor according to the equivalent factor of the tower line system;
and S16, comparing the reliability level of the recurrence period with the reliability level of the equivalent factor to determine the reliability level of the tower line system.
Preferably, in step S11, the obtaining the load factors of the wind speed recurrence periods of different ages with the wind speed recurrence period of 50 years as a reference includes:
obtaining a reliability correlation degree calculation formula of the recurrence period according to the relational expression of the wind pressure and the recurrence period; wherein, the relational expression of the wind pressure and the reappearing period is xR = x10+ (x 100-x 10) (lnR/ln 10-1); wherein, xR is the basic wind pressure of R-year recurrence period; x10 is the basic wind pressure in 10-year recurrence period; x100 is the basic wind pressure in the 100-year recurrence period;
taking a wind speed recurrence period of 50 years as a reference, and acquiring load factors of the wind speed recurrence periods of different years according to a recurrence period reliability correlation calculation formula, wherein the load factors are as follows: xR/x50=1+ β (lnR-ln 50); wherein, the first and the second end of the pipe are connected with each other,
specifically, based on the 50-year wind speed recurrence period, the method is based on the 'building load Specification' (GB 50009-2012) and the formula of China
Deriving a reconstruction period reliability phaseThe formula of the degree of relation calculation (load factor), i.e.
Wherein:
in the embodiment of the invention, the beta value is obtained by carrying out statistical calculation on all typhoon strong wind areas in the target area according to 100-year basic wind pressure values and 10-year basic wind pressure values of coastal cities in building load specifications, and load factors corresponding to different recurrence periods are obtained according to the beta value.
In the embodiment of the invention, the sizes of the load factors corresponding to different recurrence period years taking 50-year recurrence periods as reference years are determined according to a load factor calculation formula, the wind resistance reliability level of the line is defined according to the wind speed resistance capability of the line in different recurrence periods, and the load factors, the recurrence periods and the reliability levels are in one-to-one correspondence.
In the embodiment of the invention, the size of the equivalent factor follows the wind-proof design specifications of different periods, and the size of the equivalent factor is determined by a coefficient in the wind load calculation process: and calculating the wind load adjustment coefficient and the wind pressure non-uniform coefficient.
Preferably, in step S14, the equivalent factor of the tower-line system is calculated according to the wind pressure uneven coefficient and the wind load adjustment coefficient, where the calculation formula of the equivalent factor of the tower-line system is: a = (α) Wire(s) ·β Thread +α Tower with a tower body ·β Tower with a tower body ) 2; wherein a is the equivalent factor of the tower line, alpha Thread Is the wind pressure non-uniform coefficient of the ground wire, alpha Tower with a tower body Is the wind pressure uneven coefficient beta of the tower Wire(s) Adjusting the coefficient for the wind load of the ground wire; beta is a Tower with a tower body And adjusting the coefficient for the wind load of the tower.
In the embodiment of the invention, corresponding wind load calculation formulas under different voltage classes and different design specifications are analyzed and researched, a wind pressure uneven coefficient and a wind load adjustment coefficient related to wind load calculation are extracted, the product of the wind pressure uneven coefficient of the grounding wire and the wind pressure uneven coefficient of the tower is calculated according to the wind pressure uneven coefficient, the product of the wind load adjustment coefficient of the grounding wire and the wind load adjustment coefficient of the tower is calculated according to the wind load adjustment coefficient, and the equivalent factor of the tower line is obtained by taking the sum of the product of the wind pressure uneven coefficient and the product of the wind load adjustment coefficient.
Preferably, the comparing the reliability level of the recurrence period with the reliability level of the equivalence factor, and the obtaining the reliability level of the tower line includes:
obtaining comparison ranges corresponding to different reproduction period reliability levels in the reproduction period reliability levels;
and when the reliability level of the equivalent factor is detected to be in the comparison range, acquiring the reliability level of the tower line system according to the reliability level of the recurrence period corresponding to the comparison range.
In the embodiment of the invention, the reliability grade corresponding to the obtained load factor is compared with the reliability grade corresponding to the equivalent factor, and the reliability grade of the tower system is obtained.
Preferably, the method further comprises the following steps:
obtaining corresponding reliability evaluation according to the reliability grade; wherein the reliability assessment comprises being extremely unreliable, less reliable, substantially reliable, very reliable, and extremely reliable.
In the embodiment of the invention, the wind resistance reliability levels b1 and b2 \8230bnare defined according to the capability of the old line in resisting different wind speed reproduction periods, and are shown in the following table 1. In the wind resistance design of the line, the wind speed recurrence period is used as the wind speed input, the wind speed recurrence period is determined for a determined area, the corresponding wind speed is naturally known, and the equivalent recurrence period is generally 15 years, 30 years, 50 years, 100 years and the like in the industry. For example, when the value of y1 is 15, the value of y2 is 30, and the value of y3 is 50, in table 1, the value of b1 may be 1, the value of b2 may be 2, the value of b3 may be 3, and the corresponding value of x1 is 0.70, the value of x2 is 0.87, and the value of x3 is 1 according to the load factor calculation formula, which is not specifically limited in the present invention.
TABLE 1
It should be noted that, in the embodiment of the present invention, the equivalent recurrence period is defined by taking the 50-year wind speed recurrence period as a reference, for example, y1=50, and corresponds to x1=1, which is not specifically limited by the present invention.
It should be noted that the equivalent recurrence period is the frequency of occurrence of events in a probabilistic sense, for example, y =50, which means occurrence for 50 years. We use 50 years as a reference value, and the corresponding load factor is 1, in this case, the representative evaluation target (tower) can resist the wind speed which is met for 50 years, and we define the reliability level as level 3, which is not specifically limited by the present invention.
Specifically, the reliability level of the equivalent factor a is compared with the reliability level of the load factor x, for example, the reliability level a1 of the equivalent factor is a reliability level a1, the comparison range corresponding to a certain reliability level in a recurrence period is [0, x1], a1 belongs to [0, x1], the reliability level is defined as b1, that is, the reliability level corresponding to the reliability level in the recurrence period is b1 according to the comparison range corresponding to [0, x1], and a2 belongs to (x 1, x 2), the reliability level is defined as b2, and so on.
TABLE 2
It should be noted that n, m and k in table 2 may represent multiple dimensions, and the corresponding an, am and ak \8230, cn, cm and ck are all the same dimensions as their corresponding n, m and k, for example, when n has 500kv, 200kv and 110kv, an includes a7, a8 and a9, which is not limited in the present invention.
Preferably, the method further comprises the following steps: acquiring reference reliability values of lines with different importance levels in the tower line system according to the importance levels of the lines;
when the reliability grade corresponding to the line is smaller than the reference reliability value, the line is marked as modified;
and when the reliability grade corresponding to the line is greater than the reference reliability value, marking the line as not needing to be modified.
TABLE 3
It should be noted that the reference reliability values of the lines with different importance levels in the tower line system are reference reliability values b0 in table 3, and the actual values of b0 are different, which is not specifically limited in the present invention.
Specifically, according to different importance levels of lines, the windproof reconstruction assessment is carried out on the built old lines, the importance levels of the lines are divided according to the importance of receiving end users, for example, a main trunk of the western and eastern electric power transmission, a nuclear power connecting line, a networking line of the port and the australia and a protection-bottom power grid line are used as important lines, the rest are common lines, the importance levels M1, M2 and M3 are divided according to the important lines, and then a target reliability is defined for the lines with different importance levels to serve as a reference standard. And the difference between the line reliability and the target reliability is taken as the reconstruction basis, and b1-b0<0
And (5) carrying out transformation, wherein b1-b0 are not required to be transformed if being more than or equal to 0, and executing a corresponding transformation scheme. As shown in table 3.
The embodiment has the following beneficial effects:
taking a wind speed recurrence period of 50 years as a reference, acquiring load factors of wind speeds of different ages in the recurrence period, and determining the reliability levels of the recurrence period corresponding to the load factors of the wind speeds of different ages in the recurrence period according to the load factors of the wind speeds of different ages in the recurrence period; extracting wind pressure non-uniform coefficients and wind load adjustment coefficients corresponding to different voltage levels from different design specifications; the wind pressure uneven coefficient and the wind load adjustment coefficient are obtained when wind load is calculated according to different voltage levels; calculating an equivalent factor of a tower line system according to the wind pressure uneven coefficient and the wind load adjustment coefficient; determining the reliability level of the corresponding equivalent factor according to the equivalent factor of the tower line system; and comparing the reliability level of the recurrence period with the reliability level of the equivalent factor to determine the reliability level of the tower line system. The wind-proof reliability of the transmission tower can be effectively evaluated by taking the voltage grade of the transmission tower into consideration and adopting a differential evaluation method for the transmission towers adopting different design specifications, so that the wind-proof improvement design can be carried out by specifically adopting a corresponding wind-proof reinforcement method, the wind-proof reliability of different lines under different design specifications can be effectively given, a wind-proof improvement basis is provided for the coastal established transmission line, and the improvement can be carried out according to the principle and scientifically.
Referring to fig. 3, fig. 3 is a schematic structural diagram of an old line differentiation wind-prevention evaluation device according to a second embodiment of the present invention. The method comprises the following steps:
the load factor acquiring module 31 is configured to acquire load factors of wind speed recurrence periods of different ages based on a wind speed recurrence period of 50 years;
a recurrence period reliability grade obtaining module 32, configured to determine, according to the load factors of the different-age wind speed recurrence periods, recurrence period reliability grades corresponding to the load factors of the different-age wind speed recurrence periods;
the coefficient acquisition module 33 is configured to extract wind pressure uneven coefficients and wind load adjustment coefficients corresponding to different voltage levels from different design specifications; the wind pressure uneven coefficient and the wind load adjustment coefficient are obtained when wind load is calculated according to different voltage levels;
equivalence ofThe factor calculation module 34 is configured to calculate an equivalent factor of a tower line system according to the wind pressure non-uniformity coefficient and the wind load adjustment coefficient; the calculation formula of the equivalent factor of the tower line system is as follows: a = (α) Wire(s) ·β Thread +α Tower with a tower body ·β Tower with a movable tower ) 2; wherein a is the equivalent factor of the tower line, alpha Thread Is the wind pressure non-uniform coefficient of the ground wire, alpha Tower with a tower body Is the wind pressure uneven coefficient beta of the tower Thread Adjusting the coefficient for the wind load of the ground wire; beta is a Tower with a tower body Adjusting the coefficient for the wind load of the tower;
an equivalent factor reliability level obtaining module 35, configured to determine a corresponding equivalent factor reliability level according to the equivalent factor of the tower line system;
and the reliability level obtaining module 36 of the tower line system is configured to compare the reliability level of the recurrence period with the reliability level of the equivalent factor, and determine the reliability level of the tower line system.
Preferably, the method further comprises the following steps:
acquiring reference reliability values of lines with different importance levels in the tower line system according to the importance levels of the lines;
when the reliability grade corresponding to the line is smaller than the reference reliability value, the line is marked as modified;
and when the reliability grade corresponding to the line is greater than the reference reliability value, marking the line as not needing to be modified.
Preferably, the load factor acquiring module 31 includes:
obtaining a reliability correlation degree calculation formula of the recurrence period according to the relational expression of the wind pressure and the recurrence period; wherein, the relational expression of the wind pressure and the reappearing period is xR = x10+ (x 100-x 10) (lnR/ln 10-1); wherein, xR is the basic wind pressure in the R-year recurrence period; x10 is the basic wind pressure in the 10-year recurrence period; x100 is the basic wind pressure in the 100-year recurrence period;
taking a wind speed recurrence period of 50 years as a reference, and acquiring load factors of the wind speed recurrence periods of different years according to a recurrence period reliability correlation calculation formula, wherein the load factors are as follows: xR/x50=1+ β (lnR-ln 50); wherein, the first and the second end of the pipe are connected with each other,
preferably, the reliability level obtaining module 36 of the tower line system includes:
obtaining comparison ranges corresponding to different reproduction period reliability levels in the reproduction period reliability levels;
and when the reliability level of the equivalent factor is detected to be in the comparison range, acquiring the reliability level of the tower line system according to the reliability level of the recurrence period corresponding to the comparison range.
Preferably, the method further comprises the following steps:
obtaining corresponding reliability evaluation according to the reliability grade; wherein the reliability assessment comprises being extremely unreliable, less reliable, substantially reliable, very reliable, and extremely reliable.
The embodiment has the following beneficial effects:
taking a wind speed recurrence period of 50 years as a reference, acquiring load factors of wind speeds of different ages in the recurrence period, and determining the recurrence period reliability levels corresponding to the load factors of the wind speeds of different ages in the recurrence period according to the load factors of the wind speeds of different ages in the recurrence period; extracting wind pressure uneven coefficients and wind load adjustment coefficients corresponding to different voltage levels from different design specifications; the wind pressure uneven coefficient and the wind load adjustment coefficient are obtained when wind load is calculated according to different voltage levels; calculating an equivalent factor of a tower line system according to the wind pressure uneven coefficient and the wind load adjustment coefficient; determining the reliability level of the corresponding equivalent factor according to the equivalent factor of the tower line system; and comparing the reliability level of the recurrence period with the reliability level of the equivalent factor to determine the reliability level of the tower line system. The wind-proof reliability of the transmission tower can be effectively evaluated by taking the voltage grade of the transmission tower into consideration and adopting a differential evaluation method for the transmission towers adopting different design specifications, so that the wind-proof improvement design can be carried out by specifically adopting a corresponding wind-proof reinforcement method, the wind-proof reliability of different lines under different design specifications can be effectively given, a wind-proof improvement basis is provided for the coastal established transmission line, and the improvement can be carried out according to the principle and scientifically.
Referring to fig. 3, fig. 3 is a schematic diagram of an old line differential windproof evaluation device according to a third embodiment of the present invention, configured to execute the old line differential windproof evaluation method according to the third embodiment of the present invention, and as shown in fig. 3, the old line differential windproof evaluation terminal device includes: at least one processor 11, such as a CPU, at least one network interface 14 or other user interface 13, a memory 15, at least one communication bus 12, the communication bus 12 for enabling connectivity communication between these components. The user interface 13 may optionally include a USB interface, a wired interface, and other standard interfaces. The network interface 14 may optionally include a Wi-Fi interface as well as other wireless interfaces. The memory 15 may comprise a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory. The memory 15 may optionally comprise at least one memory device located remotely from the aforementioned processor 11.
In some embodiments, memory 15 stores the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof:
an operating system 151, which contains various system programs for implementing various basic services and for processing hardware-based tasks;
and (5) a procedure 152.
Specifically, the processor 11 is configured to call the program 152 stored in the memory 15 to execute the old line differentiation wind-prevention evaluation method according to the above embodiment.
The Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. The general processor can be a microprocessor or the processor can be any conventional processor, and the processor is a control center of the old line differential windproof evaluation method, and various interfaces and lines are used for connecting all parts of the old line differential windproof evaluation method.
The memory can be used for storing the computer program and/or the module, and the processor can realize various functions of the electronic device for the wind-proof evaluation of old line differentiation by running or executing the computer program and/or the module stored in the memory and calling the data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, a text conversion function, etc.), and the like; the storage data area may store data (such as audio data, text message data, etc.) created according to the use of the cellular phone, etc. In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
The module for the differentiated windproof evaluation integration of the old and old lines can be stored in a computer readable storage medium if the module is realized in the form of a software functional unit and sold or used as an independent product. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments described above may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U.S. disk, removable hard disk, magnetic diskette, optical disk, computer Memory, read-Only Memory (ROM), random Access Memory (RAM), electrical carrier wave signal, telecommunications signal, and software distribution medium, etc. It should be noted that the computer-readable medium may contain suitable additions or subtractions depending on the requirements of legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer-readable media may not include electrical carrier signals or telecommunication signals in accordance with legislation and patent practice.
It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, in the drawings of the embodiment of the apparatus provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, and may be specifically implemented as one or more communication buses or signal lines. One of ordinary skill in the art can understand and implement it without inventive effort.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
It should be noted that, in the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and in a part that is not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that acts and simulations are necessarily required of the invention.
Claims (7)
1. A differentiated windproof assessment method for old lines is characterized by comprising the following steps:
taking a wind speed recurrence period of 50 years as a reference, and acquiring load factors of the wind speed recurrence periods of different ages;
determining the reliability levels of the different annual wind speed recurrence periods corresponding to the load factors according to the load factors of the different annual wind speed recurrence periods;
extracting wind pressure uneven coefficients and wind load adjustment coefficients corresponding to different voltage levels from different design specifications; the wind pressure uneven coefficient and the wind load adjustment coefficient are obtained when wind load is calculated according to different voltage levels;
calculating an equivalent factor of a tower line system according to the wind pressure uneven coefficient and the wind load adjustment coefficient; the formula for calculating the equivalent factor of the tower line system is as follows: a = (α) Wire(s) ·β Thread +α Tower with a tower body ·β Tower with a movable tower ) 2; wherein a is the equivalent factor of the tower line, alpha Wire(s) Is the wind pressure non-uniform coefficient of the ground wire, alpha Tower with a tower body Is the wind pressure uneven coefficient, beta, of the tower Thread Adjusting the coefficient for the wind load of the ground wire; beta is a Tower with a tower body Adjusting the coefficient for the wind load of the tower;
determining the reliability level of the corresponding equivalent factor according to the equivalent factor of the tower line system;
comparing the reliability level of the recurrence period with the reliability level of the equivalent factor to determine the reliability level of the tower line system;
wherein, the acquiring the load factors of the wind speed recurrence periods of different ages by taking the wind speed recurrence period of 50 years as a reference comprises the following steps:
obtaining a reliability correlation degree calculation formula of the recurrence period according to the relation of the wind pressure and the recurrence period; wherein, the relational expression of the wind pressure and the reappearing period is xR = x10+ (x 100-x 10) (lnR/ln 10-1); wherein, xR is the basic wind pressure of R-year recurrence period; x10 is the basic wind pressure in the 10-year recurrence period; x100 is the basic wind pressure in the 100-year recurrence period;
taking a wind speed recurrence period of 50 years as a reference, and acquiring load factors of the wind speed recurrence periods of different years according to a recurrence period reliability correlation calculation formula, wherein the load factors are as follows: xR/x50=1+ β (lnR-ln 50); wherein x50 is the basic wind pressure in the 50-year recurrence period;
2. the differential windproof evaluation method for old lines according to claim 1, further comprising:
acquiring reference reliability values of lines with different importance levels in the tower line system according to the importance levels of the lines;
when the reliability grade corresponding to the line is smaller than the reference reliability value, the line is marked as modified;
and when the reliability grade corresponding to the line is greater than the reference reliability value, marking the line as not needing to be modified.
3. The differential windproof evaluation method for old lines according to claim 1, wherein the comparing the reliability level of the recurrence period with the reliability level of the equivalence factor to obtain the reliability level of the tower line comprises:
obtaining comparison ranges corresponding to different reproduction period reliability levels in the reproduction period reliability levels;
and when the reliability level of the equivalent factor is detected to be in the comparison range, acquiring the reliability level of the tower line system according to the reliability level of the recurrence period corresponding to the comparison range.
4. The differential windproof evaluation method for old lines according to claim 3, characterized by further comprising:
obtaining corresponding reliability evaluation according to the reliability grade; wherein the reliability assessment comprises being extremely unreliable, less reliable, substantially reliable, very reliable, and extremely reliable.
5. An old line differentiation windproof evaluation device, comprising:
a load factor acquisition module for acquiring load factors of wind speed recurrence periods of different ages by taking the wind speed recurrence period of 50 years as a reference
The recurrence period reliability grade acquisition module is used for determining the recurrence period reliability grade corresponding to the load factor of the different-age wind speed recurrence periods according to the load factor of the different-age wind speed recurrence periods;
the coefficient acquisition module is used for extracting wind pressure uneven coefficients and wind load adjustment coefficients corresponding to different voltage grades from different design specifications; the wind pressure uneven coefficient and the wind load adjustment coefficient are obtained when wind load is calculated according to different voltage levels;
the equivalent factor calculation module is used for calculating an equivalent factor of a tower line system according to the wind pressure uneven coefficient and the wind load adjustment coefficient; the calculation formula of the equivalent factor of the tower line system is as follows: a = (α) Thread ·β Thread +α Tower with a tower body ·β Tower with a tower body ) 2; wherein a is the equivalent factor of the tower line, alpha Thread Is the wind pressure non-uniform coefficient of the ground wire, alpha Tower with a movable tower Is the wind pressure uneven coefficient, beta, of the tower Wire(s) Adjusting the coefficient for the wind load of the ground wire; beta is a Tower with a tower body Adjusting the coefficient for the wind load of the tower;
the equivalent factor reliability level acquisition module is used for determining the corresponding equivalent factor reliability level according to the equivalent factor of the tower line system;
the reliability level acquisition module of the tower line system is used for comparing the reliability level of the recurrence period with the reliability level of the equivalent factor to determine the reliability level of the tower line system;
wherein, the acquiring the load factors of the wind speed recurrence periods of different ages by taking the wind speed recurrence period of 50 years as a reference comprises the following steps:
obtaining a reliability correlation degree calculation formula of the recurrence period according to the relational expression of the wind pressure and the recurrence period; wherein, the relational expression of the wind pressure and the reappearing period is xR = x10+ (x 100-x 10) (lnR/ln 10-1); wherein, xR is the basic wind pressure of R-year recurrence period; x10 is the basic wind pressure in 10-year recurrence period; x100 is the basic wind pressure in the 100-year recurrence period;
taking a wind speed recurrence period of 50 years as a reference, and acquiring load factors of the wind speed recurrence periods of different years according to a recurrence period reliability correlation calculation formula, wherein the load factors are as follows: xR/x50=1+ β (lnR-ln 50); wherein x50 is the basic wind pressure in the 50-year recurrence period;
6. an old line differential wind protection assessment apparatus comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, the processor implementing the old line differential wind protection assessment method of any one of claims 1 to 4 when executing the computer program.
7. A computer-readable storage medium, characterized in that the computer-readable storage medium comprises a stored computer program, wherein when the computer program runs, the computer-readable storage medium is controlled to execute the old line differential windproof evaluation method according to any one of claims 1 to 4.
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| CN110555242B (en) * | 2019-08-13 | 2023-07-14 | 南方电网科学研究院有限责任公司 | Method, device, equipment and storage medium for evaluating wind resistance of old towers |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106920041A (en) * | 2017-03-01 | 2017-07-04 | 南方电网科学研究院有限责任公司 | A kind of overhead transmission line fixed-wing UAS selection method |
| CN106991247A (en) * | 2017-04-17 | 2017-07-28 | 云南电网有限责任公司电力科学研究院 | The method for drafting and system of a kind of power network windburn distribution map |
| CN108121893A (en) * | 2017-12-18 | 2018-06-05 | 广西电网有限责任公司电力科学研究院 | A kind of distribution shaft tower wind resistance appraisal procedure based on the coupling of tower line |
-
2018
- 2018-07-20 CN CN201810810310.8A patent/CN109190150B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106920041A (en) * | 2017-03-01 | 2017-07-04 | 南方电网科学研究院有限责任公司 | A kind of overhead transmission line fixed-wing UAS selection method |
| CN106991247A (en) * | 2017-04-17 | 2017-07-28 | 云南电网有限责任公司电力科学研究院 | The method for drafting and system of a kind of power network windburn distribution map |
| CN108121893A (en) * | 2017-12-18 | 2018-06-05 | 广西电网有限责任公司电力科学研究院 | A kind of distribution shaft tower wind resistance appraisal procedure based on the coupling of tower line |
Non-Patent Citations (2)
| Title |
|---|
| 台风对输电线路影响及防风措施研究现状综述;王晶晶，张志强;《现代工业经济和信息化》;20151015;全文 * |
| 垭口型微地形对输电线路风载荷影响的分析;王璋奇等;《华北电力大学学报(自然科学版)》;20080730(第04期);全文 * |
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