CN113866556A - Transient wave recording type power distribution network overhead line monitoring method and system - Google Patents
Transient wave recording type power distribution network overhead line monitoring method and system Download PDFInfo
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- CN113866556A CN113866556A CN202111118689.4A CN202111118689A CN113866556A CN 113866556 A CN113866556 A CN 113866556A CN 202111118689 A CN202111118689 A CN 202111118689A CN 113866556 A CN113866556 A CN 113866556A
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- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
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Abstract
The application provides a transient recording type power distribution network overhead line monitoring method and system, wherein the method comprises the following steps: at the same time, acquiring a first characteristic value of the first area and a second characteristic value of the second area; obtaining the corresponding relation between the first area and the second area according to the first characteristic value and the second characteristic value; obtaining the current flow direction on the overhead line of the power distribution network according to the first characteristic value, the second characteristic value and the corresponding relation of the phase; acquiring a first transient signal of a first area and a second transient signal of a second area; judging whether the first area and/or the second area have defects or not through the current flow direction, the first transient signal and the second transient signal, and outputting defect state information; the position of the first area or the second area is changed according to the defect state information of the first area and the second area. The method can be used for checking the overhead line along the line, and the position of the defect caused by the defect condition of the line is judged, so that the flexibility is high, and the accuracy is higher.
Description
Technical Field
The application relates to the field of power distribution network monitoring, in particular to a transient wave recording type power distribution network overhead line monitoring method and system.
Background
For a power distribution network line, the problems of high fault rate, prominent repeated fault problem, large proportion of unknown fault and the like exist. Specifically, for the overhead line of the power distribution network, faults are high-resistance grounding faults which are mainly expressed as performance degradation of a lightning arrester, insulator cracks, dirt, tree discharge, lightning flashover, clearance arc grounding and the like.
In order to solve the problem of faults existing in the overhead power distribution network, the lines need to be checked, and specific positions of the faults are found. The specific checking method comprises the following steps: the voltage value of a certain position of the overhead line of the power distribution network is detected, and whether the overhead line of the power distribution network has a fault or not is judged according to whether the voltage value is abnormal or not.
However, many faults do not cause obvious abnormity of voltage values on overhead lines of the power distribution network, and the positions of the faults or faults cannot be found through the voltage values. The existing electrified detection scheme cannot monitor for a long time and is only effective to permanent faults, and most line faults have recoverability such as gap discharge, equipment flashover, moisture discharge and the like, so the existing electrified detection scheme cannot be applied to faults such as electric arcs, overvoltage, overcurrent and the like, and the application range is very limited.
Disclosure of Invention
The application provides a transient recording type power distribution network overhead line monitoring method and system, and aims to solve the problem that the traditional monitoring method cannot accurately find the position of a fault.
In a first aspect, the application provides a method for monitoring an overhead line of a transient recording type power distribution network, including:
at the same moment, acquiring a first characteristic value of a first area and a second characteristic value of a second area, wherein the first area and the second area are two different areas selected on an overhead line of a power distribution network;
obtaining the corresponding relation between the first region and the second region according to the first characteristic value and the second characteristic value;
obtaining the current flow direction on the overhead line of the power distribution network according to the first characteristic value, the second characteristic value and the phase corresponding relation;
acquiring a first transient signal of a first area and a second transient signal of a second area;
judging whether the first area and/or the second area have defects or not according to the current flow direction, the first transient signal and the second transient signal, and outputting defect state information;
and changing the position of the first area or the second area according to the defect state information of the first area and the second area, and continuously judging the defect state so as to clarify the position causing the defect.
Optionally, in the step of obtaining a first characteristic value of the first region and a second characteristic value of the second region at the same time, the first characteristic value includes voltage phase information of three phases in the first region and current amplitudes of the three phases, and the second characteristic value includes voltage phase information of three phases in the second region and current amplitudes of the three phases.
Optionally, the step of obtaining the corresponding relationship between the first region and the second region according to the first characteristic value and the second characteristic value includes:
acquiring standard voltage phase information of the overhead line of the power distribution network during normal operation;
and comparing the voltage phase information of the three phases in the first area and the voltage phase information of the three phases in the second area with the standard voltage phase information to obtain the corresponding relation of the three phases in the first area and the three phases in the second area.
Optionally, the step of obtaining the current flow direction on the overhead line of the power distribution network according to the first characteristic value, the second characteristic value, and the phase correspondence relationship includes:
selecting a phase according to the phase corresponding relation as a current flow direction judging phase;
and comparing the current amplitude of the first region and the current amplitude of the second region on the current flow direction judging phase to obtain the current flow direction.
Optionally, the step of determining whether the first area and/or the second area has a defect according to the current flow direction, the first transient signal, and the second transient signal, and outputting defect status information includes:
obtaining typical defect waveform characteristics;
calculating the similarity of the first transient signal and the typical defect waveform characteristics, and the similarity of the second transient signal and the typical defect waveform characteristics;
obtaining whether the first area and the second area have defects or not according to a preset similarity threshold;
and outputting the defect state information.
Optionally, according to a preset similarity threshold, obtaining whether the first area and the second area have defects, and outputting defect state information further includes:
if the similarity of the first transient signal and the typical defect waveform characteristic is larger than a preset similarity threshold, outputting the state information of the defect existing in the first area;
and if the similarity of the second transient signal and the typical defect waveform characteristic is greater than a preset similarity threshold, outputting the state information of the second area with the defects.
Optionally, the step of changing the position of the first area or the second area according to the defect state information of the first area and the second area, and continuing to determine whether there is a defect includes:
if the first area and the second area have defects, acquiring the current flow direction;
if the current flow direction is from the first area to the second area, reselecting an area on the rear side of the second area to replace the first area;
if the current flow direction is from the second area to the first area, reselecting an area on the rear side of the first area to replace the second area.
Optionally, the step of changing the position of the first area or the second area according to the defect state information of the first area and the second area, and continuing to determine whether there is a defect further includes:
if the first area and the second area have no defects, acquiring the current flow direction;
if the current flow direction is from the first area to the second area, reselecting an area on the front side of the first area to replace the second area;
if the current flow direction is from the second area to the first area, reselecting an area on the front side of the second area to replace the first area.
Optionally, the step of changing the position of the first area or the second area according to the defect state information of the first area and the second area, and continuing to determine whether there is a defect further includes:
if the first area has defects and the second area has no defects, judging whether the defect position is clear or not;
if the defect position is clear, outputting defect position information;
if the defect position is not clear, reselecting the area at the midpoint of the first area and the second area to replace the second area.
In a second aspect, the present application provides a transient recording type power distribution network overhead line monitoring system, including:
a monitoring unit configured to: at the same moment, acquiring a first characteristic value of a first area and a second characteristic value of a second area, wherein the first area and the second area are two different areas selected on an overhead line of a power distribution network;
a nuclear phase unit configured to: obtaining the corresponding relation between the first region and the second region according to the first characteristic value and the second characteristic value;
a defect determination unit configured to: obtaining the current flow direction on the overhead line of the power distribution network according to the first characteristic value, the second characteristic value and the phase corresponding relation;
the monitoring unit is further configured to: acquiring a first transient signal of a first area and a second transient signal of a second area;
the defect determination unit is further configured to: judging whether the first area and/or the second area have defects or not according to the current flow direction, the first transient signal and the second transient signal, and outputting defect state information;
and changing the position of the first area or the second area according to the defect state information of the first area and the second area, and continuously judging the defect state so as to clarify the position causing the defect.
According to the technical scheme, the application provides a transient recording type power distribution network overhead line monitoring method and system. The method comprises the following steps: at the same time, acquiring a first characteristic value of the first area and a second characteristic value of the second area; obtaining the corresponding relation between the first area and the second area according to the first characteristic value and the second characteristic value; obtaining the current flow direction on the overhead line of the power distribution network according to the first characteristic value, the second characteristic value and the corresponding relation of the phase; acquiring a first transient signal of a first area and a second transient signal of a second area; judging whether the first area and/or the second area have defects or not through the current flow direction, the first transient signal and the second transient signal, and outputting defect state information; the position of the first area or the second area is changed according to the defect state information of the first area and the second area. The method can be used for checking the overhead line along the line, and the position of the defect caused by the defect condition of the line is judged, so that the flexibility is high, and the accuracy is higher.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of a transient recording type power distribution network overhead line monitoring method according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of a first region and a second region provided in the present application;
fig. 3 is a schematic diagram of an overhead line of a power distribution network provided in an embodiment of the present application;
fig. 4 is another schematic diagram of an overhead line of a power distribution network provided in an embodiment of the present application;
fig. 5 is still another schematic diagram of an overhead line of a power distribution network according to an embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following examples do not represent all embodiments consistent with the present application. But merely as exemplifications of systems and methods consistent with certain aspects of the application, as recited in the claims.
The distribution network is an electric power network which receives electric energy from a transmission network or a regional power plant and distributes the electric energy to various users on site through distribution facilities or step by step according to voltage. The power distribution network consists of overhead lines, cables, towers, distribution transformers, isolating switches, reactive power compensators, accessory facilities and the like, and plays a role in distributing electric energy in a power network. The overhead line mainly refers to an overhead open line, is erected above the ground and is a power transmission line for transmitting electric energy by fixing a power transmission conductor on a tower erected on the ground through an insulator.
Referring to fig. 1, a flow chart of a transient recording type power distribution network overhead line monitoring method provided in the embodiment of the present application is shown. Referring to fig. 2, a schematic diagram of a first region and a second region is provided in the present application. As can be seen from fig. 1 and 2, the present application provides a method for monitoring an overhead line of a transient recording type power distribution network, including the following steps:
s1: at the same moment, a first characteristic value of a first area and a second characteristic value of a second area are obtained, wherein the first area and the second area are two different areas selected on an overhead line of a power distribution network.
In the technical scheme, in order to carry out defect monitoring along the power distribution network overhead line, two regions can be selected on the power distribution network overhead line to serve as the monitored regions. The purpose of defect monitoring is achieved by measuring and calculating the selected area and the like. The first characteristic value may include voltage phase information of three phases and current amplitude information of three phases in the first region, and the first characteristic value is formed by aggregation. The second characteristic value may include voltage phase information of three phases and current amplitudes of three phases in the second region. The collecting process can be completed by a collecting module, the collecting module can comprise a voltage sensor, a current sensor and the like, specifically, the voltage sensor can be an electric field, a magnetic field or an electromagnetic coupling type sensor, and the current sensor can be a magnetic field, an electromagnetic coupling or a photoelectric type sensor. The collection module can be used for collecting data, and the collection module can be used for transmitting the data through wireless connection. In practical application, through comparison between voltage phase information, three phases of the first region and the second region can be distinguished, and then a one-to-one correspondence relationship between the phases of the first region and the second region is obtained, so that judgment on the phases before data acquisition is avoided, and the first region and the second region are prevented from being corresponded in advance.
S2: and obtaining the corresponding relation between the first region and the second region according to the first characteristic value and the second characteristic value.
The method specifically comprises the following steps:
s21: acquiring standard voltage phase information of the overhead line of the power distribution network during normal operation;
s22: and comparing the voltage phase information of the three phases in the first area and the voltage phase information of the three phases in the second area with the standard voltage phase information to obtain the corresponding relation of the three phases in the first area and the three phases in the second area.
In this embodiment, the standard voltage phase information may be voltage phase information when the overhead power distribution network line operates normally. The voltage phase information comprises phase angle and other information, and the phase corresponding relation between the first area and the second area can be obtained by comparing the three-phase voltage phase information of the first area and the three-phase voltage phase information of the second area with the standard voltage phase information at the same time. Therefore, the overhead line can be prevented from being judged before the first characteristic value and the second characteristic value are acquired, the first region and the second region do not need to be manually in one-to-one correspondence, and the method is convenient and fast. For example, the above steps can clarify to which phase A, B and C of the first region the collected three pieces of voltage phase information belong, and to which phase A, B and C of the second region the collected three pieces of voltage phase information belong.
S3: and obtaining the current flow direction on the overhead line of the power distribution network according to the first characteristic value, the second characteristic value and the phase corresponding relation.
In this embodiment, the defect existence position can be checked along the line by the current flow direction. The specific steps for obtaining the current flow direction are as follows:
s31: selecting a phase according to the phase corresponding relation as a current flow direction judging phase;
s32: and comparing the current amplitude of the first region and the current amplitude of the second region on the current flow direction judging phase to obtain the current flow direction.
In this application technical scheme, on distribution network overhead line, be in the current amplitude of the current flow to the front side position that makes progress, be greater than the current amplitude of the current flow to the rear side position that makes progress, consequently through the current amplitude who calculates first region, and the ratio between the current amplitude of second region, can judge the current flow direction. At present, a large amount of access and distribution network contact power supply operation of distributed energy have uncertainty in load current flow direction, and it is very difficult to manually distinguish current flow direction.
It should be understood that, in the embodiment of the present application, for the overhead line of the power distribution network, the region through which the current flows first is referred to as the front side, and the region through which the current flows later is referred to as the rear side. The front and back sides are for convenience of description only and have no other limiting effect.
In some implementation modes, after the phase-to-phase correspondence and the current flow direction are obtained, the line topology of the overhead line of the power distribution network can be generated, and subsequent line troubleshooting work is facilitated.
S4: acquiring a first transient signal of a first area and a second transient signal of a second area;
signals such as voltage, current and frequency on the overhead line of distribution network are monitored, when the disturbance appears, can disturb and carry out automatic record ripples, form first transient state signal and second transient state signal, first transient state signal and second transient state signal are the sign of judging whether the circuit has the defect. In practical application, automatic wave recording can be respectively carried out on three phase lines in a first area, and finally a first transient signal is collected. The three-phase lines in the second area can be automatically recorded respectively, and finally, the second transient signals are collected. The automatic wave recording process can be completed by the acquisition unit, and the aggregation process can be completed by the aggregation unit.
S5: and judging whether the first area and/or the second area have defects or not according to the current flow direction, the first transient signal and the second transient signal, and outputting defect state information.
In some implementations, the first transient signal and the second transient signal can be transmitted to the cloud processor in a wireless communication manner, and the cloud processor determines the defect.
The method comprises the following specific steps:
s51: obtaining typical defect waveform characteristics;
s52: calculating the similarity of the first transient signal and the typical defect waveform characteristics, and the similarity of the second transient signal and the typical defect waveform characteristics;
s53: obtaining whether the first area and the second area have defects or not according to a preset similarity threshold;
s54: and outputting the defect state information.
Specifically, the method comprises the following steps:
s55: if the similarity of the first transient signal and the typical defect waveform characteristic is larger than a preset similarity threshold, outputting the information that the defect exists in the first area;
s56: and if the similarity of the second transient signal and the typical defect waveform characteristic is greater than a preset similarity threshold, outputting the information that the defect exists in the second area.
In the embodiment of the application, whether the first transient signal meets the typical defect waveform characteristics or not can be judged by calculating the similarity between the first transient signal and the typical defect waveform characteristics, if yes, the first area and the vicinity of the first area are possibly defective, and defect information of the first area with defects can be output to further perform troubleshooting and maintenance to eliminate the defects. Whether the second transient signal accords with the typical defect waveform characteristics or not can be judged by calculating the similarity between the second transient signal and the typical defect waveform characteristics, if so, defects possibly exist in the second area and the vicinity of the second area, and defect information of the second area with the defects can be output to carry out further inspection and maintenance to eliminate the defects. In practical application, the similarity threshold may be 80%, and may be designed according to practical situations.
S6: and changing the position of the first area or the second area according to the defect state information of the first area and the second area, and continuously judging the defect state so as to clarify the position causing the defect.
The method specifically comprises the following steps:
s61: if the first area and the second area have defects, acquiring the current flow direction;
s62: if the current flow direction is from the first area to the second area, reselecting an area on the rear side of the second area to replace the first area;
s63: if the current flow direction is from the second area to the first area, reselecting an area on the rear side of the first area to replace the second area.
Referring to fig. 3, a schematic diagram of an overhead line of a power distribution network provided in the embodiment of the present application. Fig. 3 (a) shows a case where a current flows from the first region to the second region, and fig. 3 (b) shows a case where a current flows from the second region to the first region. In this embodiment, if both the first area and the second area have defects, it is indicated that a defective line segment exists between the first area and the second area. If the current flows from the first area to the second area, the line section with the defect extends to the second area, and then the area is reselected at the rear side of the second area to replace the first area. If the current flows from the second area to the first area, the line section with the defect extends to the first area, and then the area is reselected at the rear side of the first area to replace the second area. In this way, the newly selected area can be monitored to find the specific location that caused the defect.
S64: if the first area and the second area have no defects, acquiring the current flow direction;
s65: if the current flow direction is from the first area to the second area, reselecting an area on the front side of the first area to replace the second area;
s66: if the current flow direction is from the second area to the first area, reselecting an area on the front side of the second area to replace the first area.
Referring to fig. 4, a schematic diagram of an overhead line of a power distribution network provided in the embodiment of the present application. Fig. 4 (a) shows a case where a current flows from the first region to the second region, and fig. 4 (b) shows a case where a current flows from the second region to the first region. In this embodiment, if neither the first area nor the second area has a defect, it indicates that there is no defective line segment between the first area and the second area. If current flows from the first area to the second area, the area can be reselected on the front side of the first area to replace the second area, and defects are inspected on the upstream of the first area. If current flows from the second area to the first area, the area can be reselected on the front side of the second area to replace the first area, and defects can be inspected on the upstream of the second area. In this way, the newly selected area can be monitored to find the specific location that caused the defect.
S67: if the first area has defects and the second area has no defects, judging whether the defect position is clear or not;
s68: if the defect position is clear, outputting defect position information;
s69: if the defect position is not clear, reselecting the area at the midpoint of the first area and the second area to replace the second area.
Referring to fig. 5, a schematic diagram of an overhead line of a power distribution network according to an embodiment of the present application is provided. In this embodiment, if the first area has a defect and the second area has no defect, it may be further determined whether the location causing the defect is clear, and if so, it is verified that the specific location causing the defect is found, and defect location information is output. If the location of the defect is not well defined, the area may be re-selected at the midpoint of the first area and the second area to replace the second area.
After changing the region, the steps of S1-S6 may be performed again. Through foretell investigation process, can be accurate and quick find lead to the position of defect, can accelerate maintenance speed.
The embodiment of the application still provides a transient state record wave type distribution network overhead line monitoring system, includes:
a monitoring unit configured to: at the same moment, acquiring a first characteristic value of a first area and a second characteristic value of a second area, wherein the first area and the second area are two different areas selected on an overhead line of a power distribution network;
a nuclear phase unit configured to: obtaining the corresponding relation between the first region and the second region according to the first characteristic value and the second characteristic value;
a defect determination unit configured to: obtaining the current flow direction on the overhead line of the power distribution network according to the first characteristic value, the second characteristic value and the phase corresponding relation;
the monitoring unit is further configured to: acquiring a first transient signal of a first area and a second transient signal of a second area;
the defect determination unit is further configured to: judging whether the first area and/or the second area have defects or not according to the current flow direction, the first transient signal and the second transient signal, and outputting defect state information;
and changing the position of the first area or the second area according to the defect state information of the first area and the second area, and continuously judging the defect state so as to clarify the position causing the defect.
According to the technical scheme, the application provides a transient recording type power distribution network overhead line monitoring method and system, and the method comprises the following steps: at the same moment, acquiring a first characteristic value of a first area and a second characteristic value of a second area, wherein the first area and the second area are two different areas selected on an overhead line of a power distribution network; obtaining the corresponding relation between the first region and the second region according to the first characteristic value and the second characteristic value; obtaining the current flow direction on the overhead line of the power distribution network according to the first characteristic value, the second characteristic value and the phase corresponding relation; acquiring a first transient signal of a first area and a second transient signal of a second area; judging whether the first area and/or the second area have defects or not according to the current flow direction, the first transient signal and the second transient signal, and outputting defect state information; and changing the position of the first area or the second area according to the defect state information of the first area and the second area, and continuously judging the defect state so as to clarify the position causing the defect. The monitoring method provided by the application can be used for troubleshooting the overhead line of the power distribution network along the line, the position of the defect is judged according to the defect condition of the line, the flexibility is high, and the accuracy is higher.
The embodiments provided in the present application are only a few examples of the general concept of the present application, and do not limit the scope of the present application. Any other embodiments extended according to the scheme of the present application without inventive efforts will be within the scope of protection of the present application for a person skilled in the art.
Claims (10)
1. A transient wave recording type overhead line monitoring method for a power distribution network is characterized by comprising the following steps:
at the same moment, acquiring a first characteristic value of a first area and a second characteristic value of a second area, wherein the first area and the second area are two different areas selected on an overhead line of a power distribution network;
obtaining the corresponding relation between the first region and the second region according to the first characteristic value and the second characteristic value;
obtaining the current flow direction on the overhead line of the power distribution network according to the first characteristic value, the second characteristic value and the phase corresponding relation;
acquiring a first transient signal of a first area and a second transient signal of a second area;
judging whether the first area and/or the second area have defects or not according to the current flow direction, the first transient signal and the second transient signal, and outputting defect state information;
and changing the position of the first area or the second area according to the defect state information of the first area and the second area, and continuously judging the defect state so as to clarify the position causing the defect.
2. The overhead line monitoring method for the transient recording type power distribution network according to claim 1, wherein in the step of obtaining a first characteristic value of the first area and a second characteristic value of the second area at the same time, the first characteristic value comprises voltage phase information of three phases in the first area and current amplitude of three phases, and the second characteristic value comprises voltage phase information of three phases in the second area and current amplitude of three phases.
3. The overhead line monitoring method for the transient recording type power distribution network according to claim 2, wherein the step of obtaining the phase correspondence between the first area and the second area by using the first characteristic value and the second characteristic value comprises:
acquiring standard voltage phase information of the overhead line of the power distribution network during normal operation;
and comparing the voltage phase information of the three phases in the first area and the voltage phase information of the three phases in the second area with the standard voltage phase information to obtain the corresponding relation of the three phases in the first area and the three phases in the second area.
4. The method according to claim 3, wherein the step of obtaining the current flow direction of the overhead power distribution network according to the first characteristic value, the second characteristic value and the phase correspondence relationship comprises:
selecting a phase according to the phase corresponding relation as a current flow direction judging phase;
and comparing the current amplitude of the first region and the current amplitude of the second region on the current flow direction judging phase to obtain the current flow direction.
5. The overhead line monitoring method for the transient recording type power distribution network according to claim 4, wherein the step of determining whether the first area and/or the second area has a defect according to the current flowing direction, the first transient signal and the second transient signal comprises the steps of:
obtaining typical defect waveform characteristics;
calculating the similarity of the first transient signal and the typical defect waveform characteristics, and the similarity of the second transient signal and the typical defect waveform characteristics;
obtaining whether the first area and the second area have defects or not according to a preset similarity threshold;
and outputting the defect state information.
6. The overhead line monitoring method for the transient recording wave type power distribution network according to claim 5, wherein whether the first area and the second area have defects is obtained according to a preset similarity threshold, and the step of outputting the defect state information further comprises:
if the similarity of the first transient signal and the typical defect waveform characteristic is larger than a preset similarity threshold, outputting the state information of the defect existing in the first area;
and if the similarity of the second transient signal and the typical defect waveform characteristic is greater than a preset similarity threshold, outputting the state information of the second area with the defects.
7. The overhead line monitoring method for the transient recording type power distribution network according to claim 6, wherein the step of changing the position of the first area or the second area according to the defect state information of the first area and the second area and continuously judging whether the defect exists comprises the steps of:
if the first area and the second area have defects, acquiring the current flow direction;
if the current flow direction is from the first area to the second area, reselecting an area on the rear side of the second area to replace the first area;
if the current flow direction is from the second area to the first area, reselecting an area on the rear side of the first area to replace the second area.
8. The overhead line monitoring method for the transient recording type power distribution network according to claim 7, wherein the step of changing the position of the first area or the second area according to the defect state information of the first area and the second area and continuously judging whether the defect exists further comprises the steps of:
if the first area and the second area have no defects, acquiring the current flow direction;
if the current flow direction is from the first area to the second area, reselecting an area on the front side of the first area to replace the second area;
if the current flow direction is from the second area to the first area, reselecting an area on the front side of the second area to replace the first area.
9. The overhead line monitoring method for the transient recording type power distribution network according to claim 8, wherein the step of changing the position of the first area or the second area according to the defect state information of the first area and the second area and continuously judging whether the defect exists further comprises the steps of:
if the first area has defects and the second area has no defects, judging whether the defect position is clear or not;
if the defect position is clear, outputting defect position information;
if the defect position is not clear, reselecting the area at the midpoint of the first area and the second area to replace the second area.
10. The utility model provides a transient state record ripples type distribution network overhead line monitoring system which characterized in that includes:
a monitoring unit configured to: at the same moment, acquiring a first characteristic value of a first area and a second characteristic value of a second area, wherein the first area and the second area are two different areas selected on an overhead line of a power distribution network;
a nuclear phase unit configured to: obtaining the corresponding relation between the first region and the second region according to the first characteristic value and the second characteristic value;
a defect determination unit configured to: obtaining the current flow direction on the overhead line of the power distribution network according to the first characteristic value, the second characteristic value and the phase corresponding relation;
the monitoring unit is further configured to: acquiring a first transient signal of a first area and a second transient signal of a second area;
the defect determination unit is further configured to: judging whether the first area and/or the second area have defects or not according to the current flow direction, the first transient signal and the second transient signal, and outputting defect state information;
and changing the position of the first area or the second area according to the defect state information of the first area and the second area, and continuously judging the defect state so as to clarify the position causing the defect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111118689.4A CN113866556A (en) | 2021-09-24 | 2021-09-24 | Transient wave recording type power distribution network overhead line monitoring method and system |
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