CN115184739B - Traveling wave distance measurement method and system considering comprehensive parameter change - Google Patents
Traveling wave distance measurement method and system considering comprehensive parameter change Download PDFInfo
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Abstract
The invention discloses a traveling wave distance measurement method and a traveling wave distance measurement system considering comprehensive parameter changes. Wherein, the method comprises the following steps: decomposing line parameters, performing sub-packet calculation on the full length of the line, and determining each sub-packet segmented line; calculating a line length correction value and a line length correction coefficient according to the actual line length of each sub-packet segmented line; determining wave velocity correction values at two ends of double-end distance measurement according to the endpoint short circuit test and the simulation wave velocity propagation characteristic curve; and correcting the double-end distance measurement formula according to the line length correction coefficient and the wave speed correction value, and optimizing the double-end distance measurement value. The line patrol time of line patrol workers is effectively reduced through conversion of the actual fault distance to the nominal fault distance, the economic loss caused by faults is reduced, and the stability and the reliability of the system are improved. By correcting the relevant parameters of the line length value and the wave velocity propagation value, the traveling wave distance measurement precision is effectively improved, and the requirement of the target engineering fault positioning precision is met.
Description
Traveling wave distance measurement method and system considering comprehensive parameter change
Technical Field
The invention relates to the technical field of fault location, in particular to a traveling wave distance measurement method and a traveling wave distance measurement system considering comprehensive parameter change.
Background
The transmission line is one of the most faulted devices in the power system, and once a fault tripping accident occurs, the production operation of national economy is influenced, and meanwhile, inconvenience is brought to the life of people. Accurate fault location of the power transmission line in the power system can quickly reduce the fault location range, reduce the line patrol burden, shorten the fault elimination time, and has important significance for timely repairing the line, improving the power supply reliability of the power system and reducing the power failure loss.
Traveling wave ranging is a unique fault ranging technology and is divided into a single-end method and a double-end method. The single-end method has a great difficulty in correctly identifying fault reflected waves in a long line, so that the application is limited.
At present, a double-end method is used mostly, and the basic principle of the method is that when a fault occurs inside a line, current transient fault components caused by fault initial traveling wave surges are sensed at two ends of the line. The time when the current transient fault components appear at the two ends of the line is the arrival time of the initial fault traveling wave surge, so that the distance between a fault point and the measuring points at the two ends of the line is calculated by using the difference value of the absolute times of the current transient fault components sensed at the two ends of the line, and double-end traveling wave fault location can be realized. The double-end method needs to monitor the accurate time of the initial traveling wave of the fault point reaching the two measuring ends to complete positioning, does not need to analyze and identify the reflected wave, and has high distance measurement reliability.
However, in practical application, the problem of insufficient long-line ranging accuracy exists in double-end traveling wave ranging, and the main influence factors are as follows:
(1) Non-constant value of total length of line
The line conductor has the characteristics of expansion with heat and contraction with cold, so the length of the line can change along with the change of seasonal temperature. Large line length variations can cause traveling wave ranging errors of up to several kilometers, which makes the fault traveling wave ranging errors large.
(2) Problem of measuring traveling wave velocity
The actual wave velocity is affected by various factors such as line parameters, frequency variation, geographical position, climate and the like, uncertainty exists, the attenuation of the high-frequency part of the traveling wave causes the reduction of the wave velocity amplitude, the wave velocity of the measurement is not constant, and a certain fixed value close to the light velocity is usually adopted in the past, and the fixed value wave velocity calculation generates large errors.
In conclusion, factors influencing the traveling wave distance measurement accuracy include the arrival time of the fault traveling wave, the total length of the line and the traveling wave speed. In the ultra-high voltage long-distance transmission line, the traveling wave distance measurement precision is greatly influenced by the full-length parameter and the wave velocity propagation parameter of the measured line, so that the distance measurement error is increased, and the application of the traveling wave distance measurement technology is restricted.
Disclosure of Invention
According to the invention, the traveling wave distance measurement method and the traveling wave distance measurement system which take the comprehensive parameter change into account are provided, so that the problems of fault traveling wave arrival time, line full length and traveling wave speed which influence the traveling wave distance measurement precision are solved. In the ultra-high voltage long-distance transmission line, the traveling wave distance measurement precision is greatly influenced by the full length parameter and the wave velocity propagation parameter of the measured line, so that the distance measurement error is increased, and the technical problem of the application of the traveling wave distance measurement technology is restricted.
According to a first aspect of the present invention, there is provided a traveling wave ranging method taking into account integrated parameter variations, comprising:
decomposing line parameters, performing sub-packet calculation on the full length of the line, and determining the length of each sub-packet sectional line;
according to the actual line length L of each sub-packet segmented line i Calculating the correction value L of the total line length and the correction coefficient K of the partial line length i ；
Determining wave velocity correction values at two ends of double-end distance measurement according to an endpoint short circuit test and a simulation wave velocity propagation characteristic curve
；
Correcting a double-end distance measurement formula according to the line length correction coefficient and the wave speed correction value, and optimizing a double-end distance measurement value;
wherein, according to line length correction coefficient, wave speed correction value, revise the bi-polar range finding formula, optimize the bi-polar range finding value, include:
selecting corresponding correction coefficient of the length of the branch wires according to the weather and the environmental condition of each packet and by referring to the correction coefficient table
And a full line length correction value L;
correcting values according to wave velocity
Correction value of total line length
And double-ended ranging time scale
Correcting a double-end distance measurement formula, and calculating a double-end distance measurement result based on uniform line length change:
wherein s is the position of the fault point, the two sides of the line are respectively marked as an M end and an N end,
is the mean value of the fault distance measurement of the line length at the M end,
the mean value of the N-end line length fault distance measurement is obtained;
according to the formulas (2) and (3), the mean value of the M-end line length fault distance measurement with the line length uniformly changed is utilized
Calculating fault distance measurement value under M-end nominal line length with line length sectionally changed
Mean value of N-end line length fault distance measurement by using line length uniform change
Calculating fault distance measurement value under N-end nominal line length with line length sectionally changed
To obtain the nominal fault distance of both ends
、
：
Wherein,
and correcting the coefficient for the length of the section line where the fault point is located.
Optionally, decomposing line parameters, performing packet calculation on the full length of the line, and determining each packet segmented line, where the length includes:
decomposing the model number of a target engineering lead, the span occupation ratio, the annual weather and the geographic environment condition of each region;
dividing the whole length of the line into packets and sections, dividing regions with weather close to the geographical environment condition into one packet, or designing packet section division, and independently dividing heavy ice regions and mountain region special regions into one packet;
calculating the types of the branch wires, and dividing each sub-packet into different areas according to different wire types;
and (4) calculating the step pitch, continuously dividing each region into different segments according to different step pitches in the same wire region of the same sub-packet, and determining the length of each sub-packet segmented line.
Optionally, calculating a line length correction value and a line length correction coefficient according to the actual line length of each sub-packet segmented line includes:
calculating the actual line length of each sub-packet segmented line;
accumulating the actual line lengths of the sub-packet segmented lines to obtain a full line length correction value
；
The line length correction value is compared with the nominal total length of the line
Comparing and calculating the line length correction coefficient of the line sub-packet length of different weather and environmental conditions
：
Optionally, determining wave velocity correction values at two ends of the double-end ranging according to the endpoint short circuit test and the simulated wave velocity propagation characteristic curve, including:
fitting wave velocity propagation characteristic curves of the short circuit test system at different distances according to the endpoint short circuit test and the simulation wave velocity propagation characteristic curve;
when the line has electrical fault, the fault distance measuring data recording time data is obtained according to the system debugging short circuit test double-end fault calibration time
Calculating the coarse value of line fault range finding
：
Ranging rough value according to fault
Dynamically selecting wave speed correction values at two ends of double-end distance measurement according to a wave speed propagation characteristic curve
。
According to another aspect of the present invention, there is also provided a traveling wave ranging system taking into account integrated parameter variation, comprising:
the sub-packet segmented line length calculation module is used for decomposing line parameters, performing sub-packet calculation on the full length of the line and determining each sub-packet segmented line;
the wire length correction coefficient calculation module is used for calculating a wire length correction value and a wire length correction coefficient according to the actual line length of each sub-packet segmented line;
the wave speed correction value calculation module is used for determining wave speed correction values at two ends of double-end distance measurement according to the endpoint short circuit test and the simulation wave speed propagation characteristic curve;
the double-end distance measurement optimizing module is used for correcting a double-end distance measurement formula according to the line length correction coefficient and the wave velocity correction value and optimizing a double-end distance measurement value;
wherein, optimize bi-polar range finding value module includes:
a selected line length correction value submodule for selecting corresponding sub-packet line length correction coefficients according to each packet weather and environmental conditions and by referring to the correction coefficient table
And the correction value of the whole line length
；
Selecting a double-end ranging mean sub-module for correcting values according to wave velocity
Correction value of total line length
And double-ended ranging time scale
Correcting a double-end distance measurement formula, and calculating a double-end distance measurement result based on uniform line length change:
wherein s is the position of the fault point, the two sides of the line are respectively marked as an M end and an N end,
is the mean value of the fault distance measurement of the line length at the M end,
the mean value of the N-end line length fault distance measurement is obtained;
selecting a double-end nominal distance measurement submodule, and utilizing the fault distance measurement value of the M-end line length with the line length uniformly changed according to the formulas (2) and (3)
M-end nominal line length lower fault for calculating line length sectional changeDistance measurement value
And the N-end line length fault distance measurement value utilizing the uniform change of the line length
Calculating fault distance measurement value under N-end nominal line length with line length sectionally changed
To obtain the nominal fault distance of both ends
、
：
Wherein,
and correcting the coefficient for the length of the section line where the fault point is located.
Optionally, determining a packetized segmented line module includes:
the decomposition target engineering submodule is used for decomposing the model number of a target engineering lead, the span occupation ratio, the annual weather and the geographic environment condition of each region;
the sub-segment dividing module is used for dividing the whole length of the line into sub-segments, dividing regions with weather close to the geographical environment condition into one packet, or designing the sub-segment division, and independently dividing heavy ice regions and mountain region special regions into one packet;
the sub-modules for dividing different regions are used for calculating the types of the branch wires, and each sub-package is divided into different regions according to different types of the branch wires;
and determining sub-modules of each sub-packet segmented line, wherein the sub-modules are used for calculating the segmentation distances, and the same sub-packet same lead area continues to divide each area into different segments according to different segmentation distances so as to determine the length of each sub-packet segmented line.
Optionally, the module for calculating a line length correction coefficient includes:
the sub-module for calculating the length of the sub-packet segmented line is used for calculating the actual line length of each sub-packet segmented line;
a sub-module for obtaining line length correction value, which is used for accumulating the actual line length of each sub-packet segmented line to obtain the line length correction value
；
A submodule for calculating the linear length correction coefficient and used for correcting the linear length correction value
Nominal total length of line
Comparing and calculating the line length correction coefficient of the line sub-packet length of different weather and environmental conditions
：
Optionally, the determining a wave speed correction value module includes:
the fitting propagation characteristic curve submodule is used for fitting the wave velocity propagation characteristic curves of the short-circuit test system at different distances according to the endpoint short-circuit test and the simulation wave velocity propagation characteristic curve;
the submodule for calculating the rough value of the line fault distance measurement is used for obtaining fault distance measurement data recording time data according to the calibration time of the double-end fault of the system debugging short-circuit test when the line has an electrical fault
Calculating a coarse line fault range value
：
A wave velocity correction value determining submodule for ranging the coarse value according to the fault
Dynamically selecting wave velocity correction values at two ends of double-end distance measurement according to the wave velocity propagation characteristic curve
。
Therefore, the simulation data and the actual measurement data of the engineering short circuit test are comprehensively analyzed, the wave velocity value is corrected, and the problem that the distance measurement precision error is increased due to the fact that only the simulation data are analyzed is solved. A calculation method for calculating the actual line length in a targeted manner is provided, the correction coefficient of the line length is calculated, and the problem of fault positioning errors caused by uneven change of the line length is solved. The line patrol time of line patrol workers is effectively reduced by converting the actual fault distance into the nominal fault distance, the economic loss caused by faults is reduced, and the stability and the reliability of the system are improved. By correcting the relevant parameters of the line length value and the wave velocity propagation value, the traveling wave distance measurement precision is effectively improved, and the requirement of the target engineering fault positioning precision is met.
Drawings
A more complete understanding of exemplary embodiments of the present invention may be had by reference to the following drawings in which:
fig. 1 is a schematic flow chart of a traveling wave ranging method in consideration of a change of a comprehensive parameter according to this embodiment;
fig. 2 is a schematic flow chart illustrating steps of a traveling wave ranging method considering a change of a comprehensive parameter according to this embodiment;
FIG. 3 is a schematic diagram of a circuit segment according to the present embodiment;
fig. 4 is a schematic diagram of the circuit sub-package according to the embodiment;
FIG. 5 is a schematic diagram of double-ended ranging according to the present embodiment;
fig. 6 is a schematic diagram of a traveling wave ranging system in consideration of changes in comprehensive parameters according to this embodiment.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings are not intended to limit the present invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
According to a first aspect of the present invention, there is provided a travelling wave ranging method 100 taking into account integrated parameter variations, as shown with reference to fig. 1, the method 100 comprising:
s101, decomposing line parameters, performing sub-packet calculation on the full length of the line, and determining the length of each sub-packet sectional line;
s102, according to the actual line length L of each sub-packet segmented line i Calculating the correction value L of the total line length and the correction coefficient K of the partial line length i ；
S103, determining wave velocity correction values at two ends of double-end distance measurement according to the endpoint short circuit test and the simulation wave velocity propagation characteristic curve
；
S104, correcting a double-end distance measurement formula according to the line length correction coefficient and the wave speed correction value, and optimizing a double-end distance measurement value;
wherein, according to line length correction coefficient, wave speed correction value, revise the bi-polar range finding formula, optimize the bi-polar range finding value, include:
selecting corresponding correction coefficient of the length of the branch wires according to the weather and the environmental condition of each packet and by referring to the correction coefficient table
And a full line length correction value L;
correcting values according to wave velocity
Corrected value of total line length
And double-ended ranging time scale
Correcting a double-end distance measurement formula, and calculating a double-end distance measurement result based on uniform line length change:
wherein s isAt the position of a fault point, two sides of a line are marked as an M end and an N end respectively,
is the mean value of the fault distance measurement of the line length at the M end,
the mean value of the N-end line length fault distance measurement is obtained;
according to the formulas (2) and (3), the mean value of the M-end line length fault distance measurement with the line length uniformly changed is utilized
Calculating fault distance measurement value under M-end nominal line length with line length sectionally changed
Mean value of N-end line length fault distance measurement by using line length uniform change
Calculating fault distance measurement value under N-end nominal line length with line length sectionally changed
To obtain the nominal fault distance of both ends
、
：
Wherein,
and correcting the coefficient for the length of the section line where the fault point is located.
Specifically, referring to fig. 2, a flow of steps of the present embodiment will be described:
step 1: and decomposing the line parameters, and performing sub-packet calculation on the full length of the line.
Step 2: and (4) sub-dividing to calculate a line length correction value and setting a line length correction coefficient.
And step 3: and calculating a wave velocity propagation value and setting a wave velocity correction coefficient.
And 4, step 4: and correcting the double-end distance measurement formula according to the line length correction coefficient and the wave speed correction coefficient, and optimizing the double-end distance measurement value.
The step 1 comprises the following steps:
step 1-1: and decomposing the model number of the target engineering lead, the span occupation ratio, the annual weather and the environmental conditions of each region.
Step 1-2: referring to fig. 3, the entire length of the line is divided into packets and segments, and the packets are divided into one packet according to weather and geographic environmental conditions, or the packets are designed to be divided into two packets separately in heavy ice regions, mountainous regions and other special regions.
Step 1-3: and calculating the sub-conductor model, and dividing each sub-package into different areas according to different conductor models.
Step 1-4: and (4) calculating the step pitch, and continuously dividing different sections of the same sub-packet of the same wire region according to different step pitches.
The step 2 comprises the following steps:
step 2-1: and calculating the actual line length of each sub-packet segmented line.
Step 2-2: adding the calculated line length of the sub-packet segmented line to obtain the actual total length of the line
。
Step 2-3: nominal total length of line
Comparing and calculating serial line length correction coefficients of different weather and environmental conditions
。
The step 3 comprises the following steps:
step 3-1: and fitting wave velocity propagation characteristic curves of the short circuit test system at different distances according to the endpoint short circuit test and the simulation wave velocity propagation characteristic curve.
Step 3-2: when the line has electrical fault, the fault distance measuring data recording time data is obtained according to the system debugging short circuit test double-end fault calibration time
Calculating the coarse value of line fault range finding
。
Step 3-3: ranging rough value according to fault
Dynamically selecting wave velocity propagation values at two ends of double-end distance measurement according to the wave velocity propagation characteristic curve
。
The step 4:
step 4-1: referring to fig. 4, the corresponding correction coefficient for the length of the subcontracting line is selected based on each weather and environmental condition and with reference to the correction coefficient table
Correction value of line length (actual line full length)
。
Wherein, the ratio of the nominal line length of the line to the actual line length is a correction coefficient of the line length, and the calculation formula is as follows:
Referring to FIG. 5, correction values according to wave velocity
Line length correction value (actual line full length)
And dual end ranging time scale
And correcting the double-end distance measurement formula by the subcontracting length correction coefficient, and optimizing a double-end distance measurement result. The formula after correction is as shown in formula (1).
In the formula (1), x is the position of a fault point, the two sides of the line are respectively marked as an M end and an N end,
is a calculated value of the fault distance measurement of the M end,
and calculating the fault distance measurement value of the N end.
Step 4-3: will change the line length fault distance measurement value evenly based on a certain state (span, weather condition, tower)
Calculating the fault distance measurement value under the nominal line length
Substituting the calculation result of the step 4-2 into the following formulas (2) and (3) to obtain the nominal fault distance of the two ends
、
。
Formula (2), (3)
The middle is the correction coefficient of the length of the section line at the fault point x.
Considering various factors influencing the change of the line length, such as sag, temperature, ice coating, wind power and the like, a calculation method for calculating the actual line length in a targeted manner is provided, and fault positioning errors caused by the change of the line length are eliminated. The method for calculating the sub-packets of the line comprises the steps of decomposing a target engineering line according to weather characteristics of a certain region, effectively solving the problem of unequal changes of line lengths of all sections caused by weather changes of different regions, effectively calculating accurate values of the line total length in different seasons, and eliminating fault positioning errors caused by uneven changes of the line length of each packet.
The line patrol time of line patrol workers is effectively reduced by converting the actual fault distance into the nominal fault distance, the economic loss caused by faults is reduced, and the stability and the reliability of the system are improved.
The wave velocity is influenced by factors such as line parameters, environmental parameters and the like, and becomes an indeterminate value which is difficult to calculate accurately, and the accurate calculation on site is inconsistent and practical, so that the method provides that the actual wave velocity value is used for correcting the existing wave velocity determinate value, and the accuracy of fitting an actual wave velocity propagation characteristic curve is improved and the wave velocity value during fault is corrected by the double combination of site fault experiments and theoretical simulation. And fault positioning errors caused by attenuation and change of wave speeds in different degrees are eliminated.
By correcting the relevant parameters of the line length value and the wave velocity propagation value, the traveling wave distance measurement precision is effectively improved, and the requirement of the target engineering fault positioning precision is met.
Optionally, decomposing the line parameters, performing packet calculation on the full length of the line, and determining each packet segmented line, includes:
decomposing the model number of a target engineering lead, the span occupation ratio, the annual weather and the geographic environment condition of each region;
dividing the whole length of the line into packets and sections, dividing regions with weather close to the geographical environment condition into one packet, or designing packet section division, and independently dividing heavy ice regions and mountain region special regions into one packet;
calculating the types of the sub-packages, and dividing the sub-packages into different areas according to different types of the sub-packages;
and (4) calculating the step pitch, continuously dividing each region into different segments according to different step pitches in the same wire region of the same sub-packet, and determining each sub-packet segmented line.
Optionally, calculating a line length correction value and a line length correction coefficient according to the actual line length of each sub-packet segmental line, including:
calculating the actual line length of each sub-packet segmented line;
accumulating the actual line length of each sub-packet segmented line to obtain a line length correction value
；
Correcting the line length
Nominal total length of line
Comparing and calculating the line length correction coefficient of the line sub-package length of different weather and environmental conditions
：
Optionally, determining wave velocity correction values at two ends of the double-end ranging according to the endpoint short circuit test and the simulated wave velocity propagation characteristic curve, including:
fitting wave velocity propagation characteristic curves of the short circuit test system at different distances according to the endpoint short circuit test and the simulation wave velocity propagation characteristic curve;
when the line has electrical fault, the fault distance measuring data recording time data is obtained according to the system debugging short circuit test double-end fault calibration time
Calculating the coarse value of line fault range finding
：
Ranging rough value according to fault
Dynamically selecting wave velocity correction values at two ends of double-end distance measurement according to the wave velocity propagation characteristic curve
。
Therefore, the simulation data and the engineering short circuit test actual measurement data are comprehensively analyzed, the wave velocity value is corrected, and the problem that the distance measurement precision error is increased due to the fact that only the simulation data are analyzed is solved. A calculation method for calculating the actual line length in a targeted manner is provided, the correction coefficient of the line length is calculated, and the problem of fault positioning errors caused by uneven change of the line length is solved. The line patrol time of line patrol workers is effectively reduced by converting the actual fault distance into the nominal fault distance, the economic loss caused by faults is reduced, and the stability and the reliability of the system are improved. By correcting the relevant parameters of the line length value and the wave velocity propagation value, the traveling wave distance measurement precision is effectively improved, and the requirement of the target engineering fault positioning precision is met.
According to another aspect of the present invention, there is also provided a traveling wave ranging system 600 that accounts for integrated parameter variations, as shown with reference to fig. 6, the system 600 comprising:
a sub-packet segmented line length calculation module 610, configured to decompose line parameters, perform sub-packet calculation on the full length of the line, and determine each sub-packet segmented line;
a line length correction coefficient calculation module 620, configured to calculate a line length correction value and a line length correction coefficient according to the actual line length of each sub-packet segment line;
the wave velocity correction value calculation module 630 is used for determining wave velocity correction values at two ends of double-end distance measurement according to the endpoint short circuit test and the simulation wave velocity propagation characteristic curve;
the optimized double-end ranging value module 640 is used for correcting a double-end ranging formula according to the line length correction coefficient and the wave speed correction value and optimizing a double-end ranging value;
wherein, optimize bi-polar range finding value module includes:
a selected line length correction value submodule for selecting corresponding sub-packet line length correction coefficients according to each packet weather and environmental conditions and by referring to the correction coefficient table
And the correction value of the whole line length
；
Selecting a double-end ranging mean sub-module for correcting values according to wave velocity
Correction value of total line length
And double-ended ranging time scale
Correcting a double-end distance measurement formula, and calculating a double-end distance measurement result based on uniform line length change:
wherein s is the position of a fault point, the two sides of the line are respectively marked as an M end and an N end,
is the mean value of the fault distance measurement of the line length at the M end,
the mean value of the N-end line length fault distance measurement is obtained;
selecting a double-end nominal distance measurement submodule, and utilizing the fault distance measurement value of the M-end line length with the line length uniformly changed according to the formulas (2) and (3)
Calculating line lengthFault location value under M end nominal line length with variable section
And the N-end line length fault distance measurement value utilizing the uniform change of the line length
Calculating fault distance measurement value under N-end nominal line length with line length sectionally changed
To obtain the nominal fault distance of both ends
、
：
Wherein,
and correcting the coefficient for the length of the section line where the fault point is located.
Optionally, the determining a packetized segmented line module 610 includes:
the decomposition target engineering submodule is used for decomposing the model number of a target engineering lead, the span occupation ratio, the annual weather and the geographic environment condition of each region;
the sub-packet segment dividing module is used for performing packet segment division on the whole length of the line, dividing regions with weather close to the geographical environment condition into one packet, or designing packet segment division, and independently dividing heavy ice regions and mountain region special regions into one packet;
the sub-modules for dividing different regions are used for calculating the types of the branch wires, and each sub-package is divided into different regions according to different types of the branch wires;
and determining sub-modules of each sub-packet segmented line, wherein the sub-modules are used for calculating the sub-span, the same conductor region of the same sub-packet continuously divides each region into different segments according to different spans, and the length of each sub-packet segmented line is determined.
Optionally, the module 620 for calculating a line length correction coefficient includes:
a sub-module for calculating the length of each sub-packet segmented line, which is used for calculating the actual line length of each sub-packet segmented line;
a sub-module for obtaining the line length correction value, which is used for accumulating the actual line length of each sub-packet segmented line to obtain the line length correction value
；
A submodule for calculating the linear length correction coefficient and used for correcting the linear length correction value
Nominal total length of line
Comparing and calculating the line length correction coefficient of the line sub-packet length of different weather and environmental conditions
：
Optionally, the module for determining a wave speed correction value 630 includes:
the fitting propagation characteristic curve submodule is used for fitting the wave velocity propagation characteristic curves of the short-circuit test system at different distances according to the endpoint short-circuit test and the simulation wave velocity propagation characteristic curve;
the submodule for calculating the rough value of the line fault distance measurement is used for obtaining fault distance measurement data recording time data according to the calibration time of the double-end fault of the system debugging short-circuit test when the line has an electrical fault
Calculating the coarse value of line fault range finding
：
A wave velocity correction value determining submodule for ranging the coarse value according to the fault
Dynamically selecting wave velocity correction values at two ends of double-end distance measurement according to the wave velocity propagation characteristic curve
。
The traveling wave ranging system 600 related to the comprehensive parameter change in the embodiment of the present invention corresponds to the traveling wave ranging method 100 related to the comprehensive parameter change in another embodiment of the present invention, and is not described herein again.
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 solution in the embodiment of the present application may be implemented by using various computer languages, for example, object-oriented programming language Java and transliteration scripting language JavaScript, etc.
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.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (8)
1. A traveling wave ranging method considering comprehensive parameter changes is characterized by comprising the following steps:
decomposing line parameters, performing sub-packet calculation on the full length of the line, and determining the actual line length of each sub-packet segmented line;
according to the actual line length L of each sub-packet segmented line i Calculating the correction value L of the total line length and the correction coefficient K of the partial line length i ；
Determining wave velocity correction values at two ends of double-end distance measurement according to an endpoint short circuit test and a simulation wave velocity propagation characteristic curve
；
Correcting a double-end distance measurement formula according to the line length correction coefficient and the wave speed correction value, and optimizing a double-end distance measurement value;
wherein, according to line length correction coefficient, wave speed correction value, revise the bi-polar range finding formula, optimize the bi-polar range finding value, include:
selecting corresponding correction coefficient of the length of the branch wires according to the weather and the environmental condition of each packet and by referring to the correction coefficient table
And a full line length correction value L;
correcting values according to wave velocity
Corrected value of total line length
And double-ended ranging time scale
Correcting a double-end distance measurement formula, and calculating a double-end distance measurement result based on uniform line length change:
wherein s is the position of the fault point, the two sides of the line are respectively marked as an M end and an N end,
is the mean value of the fault distance measurement of the line length at the M end,
the mean value of the N-end line length fault distance measurement is obtained;
according to the formulas (2) and (3), the mean value of the M-end line length fault distance measurement with the line length uniformly changed is utilized
Calculating fault distance measurement value under M-end nominal line length with line length sectionally changed
Mean value of N-end line length fault distance measurement by using line length uniform change
Calculating fault distance measurement value under N-end nominal line length with line length sectionally changed
To obtain the nominal fault distance of both ends
、
：
Wherein,
and correcting the coefficient for the length of the section line where the fault point is located.
2. The method of claim 1, wherein decomposing the line parameters, performing a packet calculation on the full length of the line, and determining the length of each packet segment line comprises:
decomposing the model number of a target engineering lead, the span occupation ratio, the annual weather and the geographic environment condition of each region;
dividing the whole length of the line into packets, dividing the regions with weather similar to the geographical environment condition into one packet, or designing packet division, and independently dividing the heavy ice region and the mountain region special region into one packet;
calculating the types of the branch wires, and dividing each sub-packet into different areas according to different wire types;
and (4) calculating the step pitch, continuously dividing each region into different segments according to different step pitches in the same wire region of the same sub-packet, and determining the length of each sub-packet segmented line.
3. The method of claim 1, wherein calculating a line length correction value and a line length correction factor based on the actual line length of each packetized segment line comprises:
calculating the actual line length of each sub-packet segmented line;
accumulating the actual line lengths of the sub-packet segmented lines to obtain a full line length correction value
；
Correcting the line length
Nominal total length with the line
Comparing and calculating the line length correction coefficient of the line sub-packet length of different weather and environmental conditions
：
4. The method of claim 1, determining wave velocity correction values for both ends of a double-ended range measurement based on an endpoint short circuit test and a simulated wave velocity propagation characteristic curve, comprising:
fitting wave velocity propagation characteristic curves of the short circuit test system at different distances according to the endpoint short circuit test and the simulation wave velocity propagation characteristic curve;
when the circuit is electrifiedWhen the fault occurs, according to the calibration time of the double-end fault of the system debugging short circuit test, the time data of fault distance measurement data recording is obtained
Calculating the coarse value of line fault range finding
：
Ranging rough value according to fault
Dynamically selecting wave speed correction values at two ends of double-end distance measurement according to a wave speed propagation characteristic curve
。
5. A traveling wave ranging system that accounts for synthetic parameter variations, comprising:
the sub-packet segmented line length calculation module is used for decomposing line parameters, performing sub-packet calculation on the full length of the line and determining each sub-packet segmented line;
the wire length correction coefficient calculation module is used for calculating a wire length correction value and a wire length correction coefficient according to the actual line length of each sub-packet segmented line;
the wave velocity correction value calculation module is used for determining wave velocity correction values at two ends of double-end distance measurement according to the endpoint short circuit test and the simulation wave velocity propagation characteristic curve;
the double-end distance measurement optimizing module is used for correcting a double-end distance measurement formula according to the line length correction coefficient and the wave velocity correction value and optimizing a double-end distance measurement value;
wherein, optimize bi-polar range finding value module includes:
selected line length correction value submoduleThe correction coefficient table is used for selecting the corresponding correction coefficient of the length of the sub-packaging line according to the weather and the environmental condition of each package and by referring to the correction coefficient table
And the correction value of the whole line length
；
Selecting a double-end ranging mean sub-module for correcting values according to wave velocity
Correction value of total line length
And double-ended ranging time scale
Correcting a double-end distance measurement formula, and calculating a double-end distance measurement result based on uniform line length change:
wherein s is the position of the fault point, the two sides of the line are respectively marked as an M end and an N end,
is the mean value of the fault distance measurement of the line length at the M end,
the mean value of the N-end line length fault distance measurement is obtained;
selecting a double-end nominal distance measurement submodule, and utilizing the fault distance measurement value of the M-end line length with the line length uniformly changed according to the formulas (2) and (3)
M end nominal for calculating line length sectional changeFault location value under line length
And the N-end line length fault distance measurement value utilizing the uniform change of the line length
Calculating fault distance measurement value under N-end nominal line length with line length sectionally changed
To obtain the nominal fault distance of both ends
、
：
Wherein,
and correcting the coefficient for the length of the section line where the fault point is located.
6. The system of claim 5, wherein determining a packetized segmented line module comprises:
the decomposition target engineering submodule is used for decomposing the model number of a target engineering lead, the span occupation ratio, the annual weather and the geographic environment condition of each region;
the sub-packet segment dividing module is used for performing packet segment division on the whole length of the line, dividing regions with weather close to the geographical environment condition into one packet, or designing packet segment division, and independently dividing heavy ice regions and mountain region special regions into one packet;
the sub-modules for dividing different regions are used for calculating the types of the branch wires, and each sub-package is divided into different regions according to different types of the branch wires;
and determining sub-modules of each sub-packet segmented line, wherein the sub-modules are used for calculating the segmentation distances, and the same sub-packet same lead area continues to divide each area into different segments according to different segmentation distances so as to determine the length of each sub-packet segmented line.
7. The system of claim 6, wherein the calculate line length correction factor module comprises:
the sub-module for calculating the length of the sub-packet segmented line is used for calculating the actual line length of each sub-packet segmented line;
a sub-module for obtaining line length correction value, which is used for accumulating the actual line length of each sub-packet segmented line to obtain the full line length correction value
；
A submodule for calculating the linear length correction coefficient and used for correcting the linear length correction value
Nominal total length of line
Comparing and calculating the line length correction coefficient of the line sub-packet length of different weather and environmental conditions
：
8. The system of claim 5, wherein the determine wave velocity correction value module comprises:
the fitting propagation characteristic curve submodule is used for fitting the wave velocity propagation characteristic curves of the short-circuit test system at different distances according to the endpoint short-circuit test and the simulation wave velocity propagation characteristic curve;
the submodule for calculating the rough value of the line fault distance measurement is used for obtaining fault distance measurement data recording time data according to the calibration time of the double-end fault of the system debugging short-circuit test when the line has an electrical fault
Calculating the coarse value of line fault range finding
：
A wave velocity correction value determining submodule for ranging the coarse value according to the fault
Dynamically selecting wave velocity correction values at two ends of double-end distance measurement according to the wave velocity propagation characteristic curve
。
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