CN113030640A - 10kV line fault detection system based on carrier signal fading characteristics - Google Patents
10kV line fault detection system based on carrier signal fading characteristics Download PDFInfo
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- CN113030640A CN113030640A CN202110241670.2A CN202110241670A CN113030640A CN 113030640 A CN113030640 A CN 113030640A CN 202110241670 A CN202110241670 A CN 202110241670A CN 113030640 A CN113030640 A CN 113030640A
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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
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/54—Testing for continuity
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/58—Testing of lines, cables or conductors
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Abstract
The invention discloses a 10kV line fault detection system based on carrier signal fading, which belongs to the field of medium-voltage power distribution and comprises 10kV line carrier signal fading detection equipment, a medium-voltage carrier communication slave, a slave integrated capacitive coupler, a host integrated capacitive coupler, a medium-voltage carrier communication host and a master station, wherein when a 10kV line fails, the 10kV line carrier signal fading detection equipment collects signal fading information, the signal fading information sequentially passes through the medium-voltage carrier communication slave, the slave integrated capacitive coupler, the host integrated capacitive coupler and the medium-voltage carrier communication host, and finally the fault fading detection information is reported to the master station. The invention is used for solving the problem that the fault type and the position of the 10kV line are not easy to determine, and has the advantages of calculating the signal attenuation value of the 10kV line in real time, reporting the fault information of the line to a master station system in a fault state in time and quickly positioning the fault type and the position of the 10kV line.
Description
Technical Field
The invention relates to the field of medium-voltage power distribution, in particular to a 10kV line fault detection system based on carrier signal fading characteristics.
Background
The 10kV power line environment of China is complicated, load equipment is various, the power supply path is long, line faults occur frequently, after line faults occur, fault positions and fault types are not easy to locate, the electricity consumption quality of residents is seriously influenced, potential safety hazards are brought, the maintenance cost of a power company is increased, the maintenance efficiency of the power company is reduced, real-time monitoring and locating of 10kV medium-voltage line faults are achieved, and the method has great significance for improving the electricity consumption quality of residents, improving the working efficiency of the power company and maintaining the electricity consumption safety. At present, after a 10kV line breaks down, a manual line patrol method is only needed, time and labor are wasted, the type and the position of the fault cannot be rapidly confirmed, and the power supply quality is seriously influenced.
Disclosure of Invention
Aiming at the defects or shortcomings in the prior art and the problem that the fault position and the fault type are not easy to locate in the existing 10kV power line, the invention aims to provide a 10kV line fault detection system based on carrier signal fading characteristics, wherein the 10kV line is used as a carrier, and the fault type and the fault position can be accurately and quickly confirmed by comparing signal fading values of the carrier signal during transmission in the 10kV line.
In order to achieve the purpose, the invention provides a 10kV line fault detection system based on carrier signal fading characteristics, which comprises 10kV line carrier signal fading detection equipment, a medium-voltage carrier communication slave, a slave integrated capacitive coupler, a host integrated capacitive coupler, a medium-voltage carrier communication host and a master station. When a 10kV line has a fault, the carrier signal fading detection equipment of the 10kV line collects the fading information of the fault carrier signal, sequentially passes through the medium-voltage carrier communication slave, the slave integrated capacitive coupler, the host integrated capacitive coupler and the medium-voltage carrier communication host, and finally reports the fading information of the fault carrier signal to the master station.
10kV circuit carrier signal fading detection equipment is used for gathering 10kV circuit carrier signal fading information, and under 10kV power line normal condition, 10kV circuit carrier signal fading detection equipment gathers circuit carrier signal in real time, and a stable value is calculated in the analysis, includes: the device comprises a voltage sampling module, a data transmission module and a safety protection module; when a 10kV line has faults such as short circuit, grounding and the like, the 10kV line carrier signal fading detection equipment acquires a line carrier signal, compares the current line carrier signal value with a stable value in a normal state, judges the 10kV line fault type according to the ratio, and reports the fading information of the fault carrier signal to the nearest medium-voltage carrier communication slave.
The medium-voltage carrier communication slave is used for receiving the failure carrier signal fading information reported by the carrier signal fading detection equipment of the 10kV line, calculating the amplitude characteristic and the frequency spectrum characteristic through a specific algorithm, and transmitting the amplitude characteristic and the frequency spectrum characteristic to the slave integrated capacitive coupler, and comprises the following components: the system comprises a power supply module, a signal acquisition module, a signal processing module and a master station module;
the slave machine integrated capacitive coupler is used for receiving amplitude characteristics and frequency spectrum characteristics of fault carrier signal fading information transmitted by a slave machine in medium-voltage carrier communication and transmitting the amplitude characteristics and the frequency spectrum characteristics of the fault carrier signal fading information to the host machine integrated capacitive coupler through a 10kV line, and comprises: the device comprises an impedance converter, a filtering module, a high-voltage isolation module, a large-current protection module and a lightning protection module;
the host integrated capacitive coupler is used for receiving amplitude characteristics and frequency spectrum characteristics of the fading information of the fault carrier signal sent by the slave integrated capacitive coupler and transmitting the fading information to the medium-voltage carrier communication host, and comprises: the device comprises an impedance converter, a filtering module, a high-voltage isolation module, a large-current protection module and a lightning protection module;
the medium-voltage carrier communication host is used for receiving the failure carrier signal fading information sent by the host integrated capacitive coupler, calculating the amplitude characteristic and the frequency spectrum characteristic of the failure carrier signal fading signal again through a specific algorithm, and reporting to the master station through a 4G network port or an optical fiber, and comprises the following steps: the system comprises a power supply module, a signal acquisition module, a signal processing module and a master station module;
the master station is used for receiving amplitude characteristics and frequency spectrum characteristics of the fading information of the fault carrier signal reported by the medium-voltage carrier communication host, determining the fault type and the fault position, and quickly positioning the fault position and the fault type of the 10kV line.
The invention has the advantages and positive effects that: the method can calculate the 10kV line carrier signal fading in real time, timely report the fault carrier signal fading information of the line to the master station in a fault state, quickly position the 10kV line fault type and position, and solve the problem that the 10kV line fault type and position are not easy to determine.
Drawings
Fig. 1 is a block diagram of a process of a 10kV line fault detection system based on carrier signal fading characteristics according to the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples.
Example one
As shown in fig. 1, the present embodiment provides a 10kV line fault detection system based on carrier signal fading characteristics, which includes:
the 10kV single-phase/three-phase line carrier signal fading detection equipment is used for learning for a period of time, storing a 10kV line carrier signal fading value of 50dBV, stabilizing the average value at 50dBV, when a certain phase on a 10kV line has a fault, the 10kV line carrier signal fading is changed into 10dBV, after the 10kV line carrier signal fading detection equipment collects 10dBV data, comparing the 10dBV data with the previous 50dBV data, judging that the line is in a fault, judging that the fault type is a ground fault, immediately reporting the fading information of the fault carrier signal to a medium-voltage carrier communication slave computer, obtaining the amplitude characteristic and the frequency spectrum characteristic of the signal of the fault carrier signal fading capable of being transmitted through a coupler through the medium-voltage carrier communication slave computer through discrete Fourier transformation, transmitting the amplitude characteristic and the frequency spectrum characteristic to a medium-voltage carrier host computer through the coupler, obtaining, Amplitude characteristics and frequency spectrum characteristics of signals of fault carrier signal fading transmitted by the network port are reported to the master station, and power company personnel can accurately position the fault type and position through the master station.
Example two
The difference from the first embodiment is that the system can monitor the type and position of a 10kV single-phase, two-phase or three-phase power line fault in real time, and a corresponding number of medium-voltage carrier communication hosts, medium-voltage carrier communication slaves, integrated capacitive couplers and 10kV line carrier signal fading detection equipment are installed according to actual field requirements.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.
Claims (5)
1. A10 kV line fault detection system based on carrier signal fading is characterized by comprising 10kV line carrier signal fading detection equipment, a medium-voltage carrier communication slave machine, a slave machine integrated capacitive coupler, a host machine integrated capacitive coupler, a medium-voltage carrier communication host machine and a master station; when a 10kV line has a fault, the 10kV line carrier signal fading detection equipment collects fault carrier signal information, sequentially passes through the medium-voltage carrier communication slave machine, the slave machine integrated capacitive coupler, the host machine integrated capacitive coupler and the medium-voltage carrier communication host machine, and finally reports the fault fading detection to the master station, so that the fault detection of the 10kV line is realized.
2. The system for detecting 10kV line fault based on carrier signal fading as claimed in claim 1, wherein:
the 10kV line carrier signal fading detection equipment is used for collecting 10kV line carrier signals, judging fault types and reporting the fading information of the fault carrier signals to the medium-voltage carrier communication slave computer, and comprises: the device comprises a voltage sampling module, a data transmission module and a safety protection module;
the medium-voltage carrier communication slave is used for receiving signal fading information reported by 10kV line carrier signal fading detection equipment and transmitting the signal fading information to the slave integrated capacitive coupler, and comprises: the system comprises a power supply module, a signal acquisition module, a signal processing module and a master station module;
the slave integrated capacitive coupler is used for receiving signal fading information transmitted by a slave of medium-voltage carrier communication and transmitting the signal fading information to the host integrated capacitive coupler through a 10kV line, and comprises: the device comprises an impedance converter, a filtering module, a high-voltage isolation module, a large-current protection module and a lightning protection module;
the host integrated capacitive coupler is used for receiving signal fading information sent by the slave integrated capacitive coupler and transmitting the signal fading information to the medium-voltage carrier communication host, and comprises: the device comprises an impedance converter, a filtering module, a high-voltage isolation module, a large-current protection module and a lightning protection module;
the medium-voltage carrier communication host is used for receiving signal fading information sent by the host integrated capacitive coupler and reporting the signal fading information to the master station, and comprises: the system comprises a power supply module, a signal acquisition module, a signal processing module and a master station module;
and the master station is used for receiving the signal fading information reported by the medium-voltage carrier communication host and determining the fault type and the fault position.
3. The system for detecting 10kV line fault based on carrier signal fading according to claim 2, wherein under a normal state of a 10kV power line, the carrier signal fading detection equipment of the 10kV line collects line signal fading information in real time and analyzes and calculates a stable value; when faults such as short circuit, grounding and the like occur on the 10kV line, the 10kV line carrier signal fading detection equipment collects line signal fading information, compares the current line signal fading information value with a stable value in a normal state, judges the 10kV line fault type according to the ratio, and reports the signal fading information data to the nearest medium-voltage carrier communication slave.
4. The system for detecting 10kV line faults based on carrier signal fading as claimed in claim 3, wherein the amplitude characteristic and the frequency spectrum characteristic of the medium voltage carrier communication slave computer are calculated through discrete Fourier change after the slave computer receives the line signal fading information, and are transmitted to the slave computer integrated capacitive coupler.
5. The system for detecting 10kV line fault based on carrier signal fading according to claim 4, wherein the slave-machine integrated capacitive coupler transmits signal fading information to the host-machine integrated capacitive coupler, the amplitude characteristic and the frequency spectrum characteristic of the signal fading information of the fault line are calculated again through discrete Fourier change after the medium-voltage carrier communication host receives the signal fading information of the fault line, and the signal fading information is reported to the master station through 4G, a network port or an optical fiber, so that the fault position and the fault type of the 10kV line are quickly located.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110241670.2A CN113030640A (en) | 2021-03-04 | 2021-03-04 | 10kV line fault detection system based on carrier signal fading characteristics |
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| CN202110241670.2A CN113030640A (en) | 2021-03-04 | 2021-03-04 | 10kV line fault detection system based on carrier signal fading characteristics |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116800302A (en) * | 2023-07-25 | 2023-09-22 | 青岛鼎信通讯股份有限公司 | 10kV communication amplitude self-adaptive system based on medium-voltage carrier |
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| CN102680855A (en) * | 2012-05-15 | 2012-09-19 | 东南大学 | Cable fault detecting and positioning method based on waveform replication |
| CN109387733A (en) * | 2018-12-21 | 2019-02-26 | 云南电网有限责任公司电力科学研究院 | A kind of distribution circuit single-phase earth fault localization method and system |
| CN111679152A (en) * | 2020-06-10 | 2020-09-18 | 青岛鼎信通讯股份有限公司 | Cable fault detection device based on power line carrier |
| CN111856204A (en) * | 2020-06-13 | 2020-10-30 | 青岛鼎信通讯股份有限公司 | 10kV line fault detection system based on carrier output impedance |
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- 2021-03-04 CN CN202110241670.2A patent/CN113030640A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680855A (en) * | 2012-05-15 | 2012-09-19 | 东南大学 | Cable fault detecting and positioning method based on waveform replication |
| CN109387733A (en) * | 2018-12-21 | 2019-02-26 | 云南电网有限责任公司电力科学研究院 | A kind of distribution circuit single-phase earth fault localization method and system |
| CN111679152A (en) * | 2020-06-10 | 2020-09-18 | 青岛鼎信通讯股份有限公司 | Cable fault detection device based on power line carrier |
| CN111856204A (en) * | 2020-06-13 | 2020-10-30 | 青岛鼎信通讯股份有限公司 | 10kV line fault detection system based on carrier output impedance |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116800302A (en) * | 2023-07-25 | 2023-09-22 | 青岛鼎信通讯股份有限公司 | 10kV communication amplitude self-adaptive system based on medium-voltage carrier |
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Application publication date: 20210625 |