CN113466608A - Intelligent searching and analyzing system and method for distribution network line ground fault - Google Patents
Intelligent searching and analyzing system and method for distribution network line ground fault Download PDFInfo
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- CN113466608A CN113466608A CN202110557520.2A CN202110557520A CN113466608A CN 113466608 A CN113466608 A CN 113466608A CN 202110557520 A CN202110557520 A CN 202110557520A CN 113466608 A CN113466608 A CN 113466608A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
Abstract
The invention discloses a distribution network line ground fault intelligent searching and analyzing system and a distribution network line ground fault intelligent searching and analyzing method. The method comprises the following steps: s1, connecting the hand-held terminal with a grounding line; s2 judging the fault direction through the current test module; s3, judging a specific fault result through a fault judgment module; s4, displaying and storing the fault result by the handheld terminal and uploading the fault result to the control center; and S5, the control center collects the power grid circuit faults to perform analysis and optimization and uploads the faults to the monitoring management cloud platform. According to the technical scheme, the intelligent judgment of the fault direction is realized through the optimization of the handheld terminal of the distribution network line ground fault searching device, the use difficulty of equipment is reduced, the convenience and the accuracy are improved, the storage of the test data searched for by the fault is realized, the test data are uploaded to the control center through the data line and the national network handheld terminal in an interactive mode, the construction of a large fault digital database is realized, and the fault searching efficiency is improved.
Description
Technical Field
The invention relates to the technical field of ground fault detection, in particular to a distribution network line ground fault intelligent searching and analyzing system and method.
Background
Electric energy is used as a clean and efficient secondary energy, is closely related to national economic construction and daily life of people, and an electric power system for collecting electric energy production, transmission, distribution and consumption is of great importance to various industries as a support industry of the national civilians. With the progress of modern society, the rapid development of economy and the sudden increase of electric loads, higher and higher requirements on the reliability, stability, safety and quality of a power system are put forward.
Data display exists, and at present, the handheld terminals of the existing distribution network line ground fault finding device only have a signal current value display function, and the direction and the phase of a fault point cannot be intelligently judged, and data interaction and uploading with the national network handheld terminals cannot be carried out to a service system; due to the fact that the mastering degrees of fault searching personnel on the equipment are different, the equipment cannot normally play a role in a fault first-aid repair field, artificial misjudgment of faults is caused, and therefore fault points cannot be found quickly.
Chinese patent document CN208297656U discloses a "power distribution network fault line detection device". The system comprises a voltage transformer and a current transformer which are respectively connected with an A/D conversion unit, and voltage and current signals obtained from a power grid are converted into small alternating current signals suitable for the A/D conversion unit; the intelligent distribution line monitoring system comprises a DSP processing unit, a ZigBee wireless transmitting and receiving unit and a solar cell panel, wherein when the ZigBee wireless transmitting and receiving unit with low power consumption is adopted for wireless communication, the intelligent distribution line monitoring system has a routing function, voltage and current data on a local line can be uploaded, routing service can be provided for information of other adjacent data acquisition devices, and meanwhile, a local DSP processing result can be transmitted to a remote coordinator through the ZigBee wireless transmitting and receiving unit through wireless communication so that a remote terminal can implement online monitoring on a distribution line. According to the technical scheme, the fault location of the collected current is only realized, the direction and the phase of the fault point are not judged, and the fault is easily judged by people due to different levels of workers.
Disclosure of Invention
The invention mainly solves the technical problems that the prior technical scheme only realizes the line information acquisition function, lacks the judgment on line faults and is easy to cause artificial misjudgment of faults due to different levels of workers, and provides a distribution network line ground fault intelligent searching and analyzing system and a method.
The technical problem of the invention is mainly solved by the following technical scheme:
the utility model provides a join in marriage net twine way earth fault intelligence and seek analytic system, includes handheld terminal, control center and the control management cloud platform that links to each other in proper order, control center and terminal link to each other. The handheld terminal is used for obtaining a detection fault direction and a detection result in the field, judging specific faults, uploading collected data and the fault result to the control center, and the control center realizes the summary and integral analysis of the power grid circuit faults and realizes integral optimization.
Preferably, the handheld terminal comprises a fault judgment module, and a current test module, a display module, a storage module, a GPS positioning module and a communication module which are respectively connected with the fault judgment module. The current testing module is used for carrying out circuit testing, obtaining testing data and judging fault direction, transmitting detected signal current to the fault judging module to judge specific faults, uploading collected data and fault results by means of the communication module, the display module is used for displaying the collected current data and judged fault information, the storage module is used for storing the fault information to realize comprehensive judgment, and the GPS positioning module is used for collecting the geographic position of a fault detection point to facilitate accurate positioning of a fault generation position.
Preferably, the current testing module comprises a signal generator and a path tracking module for judging a fault line. The signal generator emits a high voltage pulse capable of causing a flashover at the fault point and producing an acoustic signal and a frequency signal that propagates over the power cable forming a magnetic field signal.
Preferably, the path tracking module comprises a sound collection device and a magnetic field sensor. The sound collection device is used for collecting sound signals generated by flashover at fault points, and the magnetic field sensor is used for collecting magnetic field signals formed by transmission of frequency signals on the power cable.
Preferably, the fault judgment module comprises a pulse generator for emitting a narrow pulse signal, a signal acquisition module for acquiring a reflected wave, and a signal acquisition driving module. The reflected wave signals collected by the signal collection module are generated by fault points, and the signal collection driving module adopts a three-stage driving circuit and is used for realizing the functions of signal following, electrical isolation and differential driving.
An analysis method of an intelligent searching and analyzing system for a distribution network line ground fault comprises the following steps:
s1, connecting the hand-held terminal with a grounding line;
s2 judging the fault direction through the current test module;
s3, judging a specific fault result through a fault judgment module;
s4, displaying and storing the fault result by the handheld terminal and uploading the fault result to the control center;
the method comprises the following steps that S5 a control center collects power grid circuit faults to carry out analysis and optimization, and uploads the power grid circuit faults to a monitoring management cloud platform; the monitoring management cloud platform is used for storing data collected by the handheld terminal at the cloud end and the obtained fault judgment direction and analysis result.
S6 the user accesses the fault result by the terminal connection control center.
Preferably, in the step S2, the signal generator in the current testing module transmits a high voltage pulse and a frequency signal, the high voltage pulse enables the fault point to generate a flashover and generate a sound signal, the frequency signal is transmitted on the power cable to form a magnetic field signal, the sound collecting device collects the sound signal generated by the fault point, the magnetic field sensor collects the magnetic field signal generated by the frequency signal transmitted on the power cable, and the fault point is synchronously located according to the collected sound signal and the collected magnetic field signal.
Preferably, in step S3, the pulse generator sends out a pulse signal, the signal acquisition module acquires a reflected wave generated by the fault point, the signal acquisition driving module performs signal following, electrical isolation and differential driving, and the signal acquisition driving module performs analysis and calculation according to the information acquired by the signal acquisition unit to determine the fault point and the fault type.
The invention has the beneficial effects that: the intelligent judgment of the fault direction is realized by optimizing the handheld terminal of the distribution network line ground fault searching device, the use difficulty of equipment is reduced, the convenience and the accuracy are improved, the stored fault searching test data are uploaded to the control center through the data line and the national network handheld terminal in an interactive mode, the construction of a large fault digital database is realized, the workload is reduced, the working flow of fault searching is optimized, and the fault searching efficiency is improved.
Drawings
FIG. 1 is a block diagram of a schematic connection architecture of the present invention.
Fig. 2 is a flow chart of the present invention.
Fig. 3 is a structural diagram of a hand-held terminal of the present invention.
In the figure, a handheld terminal 1, a current testing module 1.1, a fault judging module 1.2, a display module 1.3, a storage module 1.4, a GPS positioning module 1.5, a communication module 1.6, a control center 2, a terminal 3 and a monitoring management cloud platform 4 are arranged.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example (b): as shown in fig. 1, the distribution network line ground fault intelligent searching and analyzing system and method of this embodiment include a handheld terminal 1, where the handheld terminal 1 includes a current testing module 1.1, a fault determining module 1.2, and a communication module 1.6, which are connected in sequence, and the handheld terminal 1 further includes a display module 1.3, a storage module 1.4, and a GPS positioning module 1.5. The display module is used for displaying the collected current data and the judged fault information, the storage module is used for storing the fault information so as to realize comprehensive judgment, and the GPS positioning module is used for collecting the geographic position of the fault detection point so as to be convenient for accurately positioning the fault generation position.
The current test module 1.1 comprises a signal generator and a path tracing module for determining a faulty line. The signal generator emits a high voltage pulse capable of causing a flashover at the fault point and producing an acoustic signal and a frequency signal that propagates over the power cable forming a magnetic field signal. The path tracking module comprises a sound collection device and a magnetic field sensor. The sound collection device is used for collecting sound signals generated by flashover at fault points, and the magnetic field sensor is used for collecting magnetic field signals formed by transmission of frequency signals on the power cable.
The fault judgment module 1.2 comprises a pulse generator for transmitting narrow pulse signals, a signal acquisition module for acquiring reflected waves and a signal acquisition driving module. The narrow pulse signal is 120V-220V, the reflected wave signal collected by the signal collection module is generated by a fault point, and the signal collection driving module adopts a three-stage driving circuit and is used for realizing the functions of signal following, electrical isolation and differential driving.
The handheld terminal 1 is connected with the control center 2 through the communication module 1.6, and the control center 2 is connected with the monitoring management cloud platform 4. The control center 2 realizes the summary and the integral analysis of the power grid circuit faults and is used for searching the grounding faults of the distribution network lines and building a fault digital large database. The monitoring management cloud platform 4 is used for storing data collected by the handheld terminal and obtained fault judgment directions and analysis results at a cloud end.
As shown in fig. 3, an analysis method of an intelligent searching and analyzing system for a distribution network line ground fault is characterized by comprising the following steps:
s1 the hand terminal 1 is connected to the ground line.
S2 determines the fault direction through the current test module 1.1. Firstly, a signal generator in a current testing module 1.1 transmits high-voltage pulse and frequency signals, the high-voltage pulse can enable the fault point to generate flashover and generate sound signals, the frequency signals are transmitted on a power cable to form magnetic field signals, a sound collecting device collects the sound signals generated by the flashover of the fault point, a magnetic field sensor collects the magnetic field signals formed by the transmission of the frequency signals on the power cable, and the fault point is synchronously positioned according to the collected sound signals and the collected magnetic field signals.
And S3, judging the specific fault result through the fault judging module 1.2. The pulse generator sends out a pulse signal, the signal acquisition module acquires reflected waves generated by a fault point, the signal acquisition driving module carries out signal following, electrical isolation and differential driving, and the fault point and the fault type are determined by analyzing and calculating according to information acquired by the signal acquisition unit.
S4 the hand-held terminal 1 displays and stores the fault result and uploads the fault result to the control center 2.
And S5, the control center 2 summarizes the power grid circuit faults for analysis and optimization and uploads the power grid circuit faults to the monitoring management cloud platform 4.
S6 user connects control center 2 to visit the fault result by terminal 3, to achieve the aim of remote monitoring the fault reason.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Although the terms handheld terminal, fault determination module, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (8)
1. The utility model provides a join in marriage net twine way ground fault intelligence and look for analytic system which characterized in that, includes handheld terminal (1), control center (3) and control management cloud platform (4) that link to each other in proper order, control center (3) and terminal (3) link to each other.
2. The distribution network line ground fault intelligent searching and analyzing system of claim 1, characterized in that the handheld terminal (1) comprises a fault judgment module (1.2), and a current test module (1.1), a display module (1.3), a storage module (1.4), a GPS positioning module (1.5) and a communication module (1.6) which are respectively connected with the fault judgment module (1.2).
3. The intelligent searching and analyzing system for the ground fault of the distribution network line according to claim 2, characterized in that the current test module (1.1) comprises a signal generator and a path tracking module for judging a fault line.
4. The intelligent searching and analyzing system for the ground fault of the distribution network line according to claim 1, wherein the path tracking module comprises a sound collecting device and a magnetic field sensor.
5. The intelligent searching and analyzing system for the ground fault of the distribution network line according to claim 2, wherein the fault judgment module (1.2) comprises a pulse generator for emitting a narrow pulse signal, a signal acquisition module for acquiring a reflected wave and a signal acquisition driving module.
6. An analysis method of an intelligent searching and analyzing system for a distribution network line ground fault is characterized by comprising the following steps:
s1, connecting the hand-held terminal (1) with a grounding line;
s2, judging the fault direction through the current testing module (1.1);
s3, judging a specific fault result through a fault judgment module (1.2);
s4, the handheld terminal (1) displays and stores the fault result and uploads the fault result to the control center (2);
the S5 control center (2) collects the power grid circuit faults to perform analysis and optimization and uploads the faults to the monitoring management cloud platform (4); s6 user connects control center (2) to access fault result by terminal (3).
7. The analysis method of the distribution network line ground fault intelligent searching and analyzing system of claim 6, wherein in the step S2, the signal generator in the current testing module (1.1) emits high voltage pulses and frequency signals, the high voltage pulses enable the fault point to generate a flashover and generate a sound signal, the frequency signal is transmitted on the power cable to form a magnetic field signal, the sound collecting device collects the sound signal generated by the flashover and generated by the fault point, the magnetic field sensor collects the magnetic field signal generated by the frequency signal transmitted on the power cable, and the fault point is synchronously located according to the collected sound signal and the collected magnetic field signal.
8. The analysis method of the distribution network line ground fault intelligent searching and analyzing system of claim 6, wherein the pulse generator of the step S3 sends out a pulse signal, the signal acquisition module acquires a reflected wave generated by a fault point, the signal acquisition driving module performs signal following, electrical isolation and differential driving, and the analysis and calculation are performed according to the information acquired by the signal acquisition unit to determine the fault point and the fault type.
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| CN117630613A (en) * | 2024-01-25 | 2024-03-01 | 南京九维测控科技有限公司 | Cable insulation fault positioning method based on grounding circular flow fitting curve |
| CN117630613B (en) * | 2024-01-25 | 2024-04-26 | 南京九维测控科技有限公司 | Cable insulation fault positioning method based on grounding circular flow fitting curve |
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