CN112198356A - Current signal detection sensor of high-voltage overhead line - Google Patents
Current signal detection sensor of high-voltage overhead line Download PDFInfo
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- CN112198356A CN112198356A CN202011069627.4A CN202011069627A CN112198356A CN 112198356 A CN112198356 A CN 112198356A CN 202011069627 A CN202011069627 A CN 202011069627A CN 112198356 A CN112198356 A CN 112198356A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measurement Of Current Or Voltage (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The embodiment of the application provides a high-voltage overhead line's current signal detection sensor, includes: the opening and closing position of the openable wire clamping shell is provided with a cable penetrating hole; the open type three-phase current transformer and the voltage access puncture assembly are arranged in the wire clamping shell, and the voltage access puncture assembly comprises a voltage access puncture part, a locking mechanism with threads and a wire pressing block; the voltage access puncturing part is arranged opposite to the line pressing block, the voltage access puncturing part is fixed on the inner wall of the line clamping shell, a screw hole is formed in the line pressing block, and the locking mechanism penetrates through the line clamping shell to be in threaded connection with the line pressing block so as to drive the line pressing block to move in a direction perpendicular to the cable penetrating hole; and the signal processor is used for acquiring electric energy from the cable through the voltage access puncture part and sampling and processing a current signal of the cable through the three-phase current transformer. The device can be assembled and disassembled in a charged manner, and autonomous power supply and three-phase synchronous sampling are realized.
Description
Technical Field
The embodiment of the application relates to the field of power system sensors, in particular to a current signal detection sensor of a high-voltage overhead line.
Background
In the application of the current internet of things, electric signals such as current of a high-voltage overhead line and the like need to be collected to perform big data analysis. The current detection sensor of the current distribution network mainly adopts the following two technologies:
one is the CT mode that adopts traditional electromagnetic type, and this kind of mode need have a power failure and install the sensor, can't accomplish not to arrange fast under the user power failure condition and implement, and it is very limited in many application scenes use.
The other is a mode of adopting a traditional electromagnetic single-phase CT and a microcontroller with sampling and processing functions to acquire current signals, converting the current signals into digital signals, and transmitting the data to a receiving end for processing in a communication mode capable of isolating a high-voltage side from a low-voltage side through wireless or optical fibers and the like. The sensor realized by the method has the defects that the sensor needs to supply power, only current power taking can be adopted as a main power supply mode, and the sensor cannot be used in a plurality of applications with smaller current load and insufficient power taking capability; in addition, the method cannot realize synchronous sampling of three-phase current, and is not beneficial to subsequent data analysis and calculation.
Disclosure of Invention
The embodiment of the application provides a high-voltage overhead line's signal of telecommunication detection sensor to reach electrified loading and unloading sensor, independently supply power, the purpose of three-phase synchronous sampling.
The embodiment of the application provides a high tension overhead line's current signal detection sensor, includes:
the cable clamping device comprises a cable clamping shell capable of being opened and closed, wherein a cable penetrating hole is formed in the opening and closing position of the cable clamping shell;
the open type three-phase current transformer and the voltage access puncture assembly are arranged in the wire clamping shell;
the signal processor is respectively electrically connected with the open type three-phase current transformer and the voltage access puncture part, and is used for acquiring electric energy from a cable penetrating into the cable penetration hole through the voltage access puncture part and sampling and processing a current signal of the cable through the three-phase current transformer;
the signal processor comprises a high-voltage signal processing unit and a low-voltage signal processing unit, wherein the high-voltage signal processing unit is used for carrying out AD sampling and processing on the current signal and transmitting a processing result to the low-voltage signal processing unit through an optical fiber; the low-voltage signal processing unit is used for outputting a processing result after DA conversion and signal processing are carried out on the processing result, the high-voltage signal processing unit and the low-voltage signal processing unit both comprise voltage energy-taking modules, and the high-voltage signal processing unit and the low-voltage signal processing unit are coupled through a high-voltage capacitor.
The sensor that this application embodiment provided adopts above-mentioned card line structure to be fixed in the card line shell on the high-voltage overhead line cable conductor, utilizes voltage to insert the puncture subassembly and realizes obtaining the electric energy from the cable conductor, utilizes open type three phase current transformer to obtain current signal, finally realizes current signal's sampling and processing by signal processor to realize current signal's collection under the condition that need not cut off the power supply, and realized autonomic power supply and three-phase synchronous sampling.
Drawings
FIG. 1 is a schematic diagram of a sensor configuration provided in accordance with an embodiment of the present application;
FIG. 2 is a schematic structural view of a voltage access spike assembly provided in one embodiment of the present application;
fig. 3 is a schematic circuit diagram of a signal processor according to an embodiment of the present application.
Detailed Description
In order to better understand the technical solutions described above, the technical solutions of the embodiments of the present application are described in detail below with reference to the drawings and the specific embodiments, and it should be understood that the specific features of the embodiments and the embodiments of the present application are detailed descriptions of the technical solutions of the embodiments of the present application, and are not limitations of the technical solutions of the present application, and the technical features of the embodiments and the embodiments of the present application may be combined with each other without conflict.
The embodiment of the application provides a sensor for gathering high-voltage overhead line electric signal, refer to fig. 1 to 2, include:
the cable clamping device comprises a cable clamping shell 1 capable of being opened and closed, wherein a cable penetrating hole 2 is formed in the opening and closing position of the cable clamping shell 1;
the open type three-phase current transformer 3 and the voltage access puncture assembly 4 are arranged in the wire clamping shell 1, and the voltage access puncture assembly 4 comprises a voltage access puncture part 41, a locking mechanism 42 with threads and a wire pressing block 43; the voltage access puncturing part 41 and the line pressing block 43 are arranged oppositely, the voltage access puncturing part 41 is fixed on the inner wall of the line clamping shell 1, a screw hole is formed in the line pressing block 43, and the locking mechanism 42 penetrates through the line clamping shell 1 to be in threaded connection with the line pressing block 43 so as to drive the line pressing block 43 to move in a direction perpendicular to the direction of the cable penetrating hole 2;
and the signal processor 5 is respectively electrically connected with the open type three-phase current transformer 3 and the voltage access puncture part 41, is used for acquiring electric energy from a cable penetrating into the cable penetrating hole 2 through the voltage access puncture part 41, and is used for sampling and processing a current signal of the cable through the three-phase current transformer 3.
The sensor that this application embodiment provided adopts above-mentioned card line structure to be fixed in the card line shell on the high-voltage overhead line cable conductor, utilizes voltage to insert the puncture subassembly and realizes obtaining the electric energy from the cable conductor, utilizes open type three phase current transformer to obtain current signal, finally realizes current signal's sampling and processing by signal processor to realize current signal's collection under the condition that need not cut off the power supply, and realized autonomic power supply and three-phase synchronous sampling.
Optionally, an aviation plug is further arranged on the wire clamping shell, and the voltage access puncturing part and the open type three-phase current transformer are electrically connected with the signal processor through the aviation plug.
In the embodiment of the application, the wire clamping shell is made of non-conductive hard materials, such as plastics, ceramics and the like.
And under the state that the wire clamping shell is buckled, the open type three-phase current transformer 3 surrounds the overhead wire penetrating hole 2.
In the embodiment of the present application, the material of the wire pressing block 43 is preferably an insulating material, such as rubber, plastic, etc.
The fixing mode of the wire clamping shell on the cable is not limited in the embodiment of the application. By way of example and not limitation, the wire clamping shell comprises a first shell part and a second shell part, the first shell part and the second shell part can be fixed through a buckle, so that the wire clamping shell is fixed on the electric cable, and the first shell part and the second shell part can also be fixed on the electric cable through a locking mechanism penetrating through the wire clamping shell.
The fixing mode of the open type three-phase current transformer on the wire clamping shell is not limited. In practical application, the open type three-phase current transformer is fixed on the inner wall of the wire clamping shell. If the card wire casing comprises a first casing part and a second casing part, the open type three-phase current transformer can be fixed on the first casing part and the second casing part. When the three-phase current transformer is fixed, the wire clamping shell and the open type three-phase current transformer need to be ensured to be in an open state, a cable can be smoothly brought into a cable penetrating hole, and then the current transformer and the wire clamping shell can be smoothly closed.
As shown in fig. 3, the signal processor 5 includes a high voltage signal processing unit 51 and a low voltage signal processing unit 52, and in order to ensure that the high voltage part and the low voltage part are sufficiently isolated, the high voltage signal processing unit 51 and the low voltage signal processing unit 52 are loosely connected by capacitive coupling and optical fiber communication.
The voltage energy-taking part of the high-voltage signal processing unit 51 of the signal processor 5 is isolated by using a transformer B1, and the energy-taking module A sets the voltage signal and converts the voltage signal into a direct-current power supply for the AD sampling and signal processing module, so that the normal work of the AD sampling and signal processing module of the current is ensured.
The current AD sampling and signal processing module converts the current analog quantity into a digital signal, and the digital signal is communicated with the DA conversion and signal processing module of the low-voltage signal processing unit 52 in the signal processor 5 through an optical fiber to complete data transmission, and the voltage resistance between high voltage and low voltage of current signal acquisition is completed through the optical fiber.
The voltage energy-taking part of the low-voltage signal processing unit 52 of the signal processor 5 is coupled with the high-voltage signal processing unit 51 through a high-voltage capacitor C1, the voltage resistance between high voltage and low voltage is completed by the high-voltage capacitor, the voltage energy-taking part of the mortgage signal processing unit 52 is isolated by a transformer B2, and the energy-taking module B sets the voltage signal and converts the voltage signal into a direct-current power supply for the DA conversion and signal processing module, so that the normal work of the DA conversion and signal processing module is ensured.
The DA conversion and signal processing module converts the digital signals into analog signals and outputs the analog signals to the next-stage sampling unit, so that the work of the whole current sensor is completed.
The sensor that this application embodiment provided, the current sensor who has avoidd the traditional electromagnetic type of 10KV overhead line need have a power failure and install inconvenient this shortcoming, has reached with the effect of traditional electromagnetic type current sensor sampling, compares traditional electromagnetic type current sensor simultaneously, and the fork has possessed light in weight, withstand voltage high characteristics, is favorable to extensive stationing to accelerate promotion 10KV overhead line distribution thing networking datamation, informationization.
The novel current sensor overcomes the defect that the traditional electromagnetic CT cannot be installed in a charged mode and is not beneficial to rapid arrangement, and has the characteristics of light weight and high withstand voltage; meanwhile, the technical problems of power supply, synchronous sampling and the like are effectively solved, the high-voltage side and the low-voltage side are effectively isolated, and the safety and the reliability of use are ensured. Specifically, the method comprises the following steps:
the open type three-phase current transformer is arranged on a cable wire of a 10KV overhead line by using a special wire clamping shell capable of being assembled and disassembled in an electrified way, and can induce the current in the line and measure a current signal.
The voltage access puncture assembly in the wire clamping shell can also obtain the voltage of a power cable, and the wire clamping shell is used as a working power supply of the sensor, so that zero current detection and zero current use can be realized.
The high-voltage part and the low-voltage part of the electric signal processor are loosely connected through a high-voltage capacitor and an optical fiber, and the voltage-resistant level is high.
After the point signal processor converts the high-voltage current signal into a digital signal, the low-voltage part is subjected to DA conversion, the error is small, and the measurement precision is mainly determined by the current acquisition accuracy of the high-voltage side.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present specification without departing from the spirit and scope of the specification. Thus, if such modifications and variations of the present specification fall within the scope of the claims of the present specification and their equivalents, the specification is intended to include such modifications and variations.
Claims (3)
1. A current signal detection sensor for a high-voltage overhead line, comprising:
the cable clamping device comprises a cable clamping shell capable of being opened and closed, wherein a cable penetrating hole is formed in the opening and closing position of the cable clamping shell;
the open type three-phase current transformer and the voltage access puncture assembly are arranged in the wire clamping shell;
the signal processor is respectively electrically connected with the open type three-phase current transformer and the voltage access puncture part, and is used for acquiring electric energy from a cable penetrating into the cable penetration hole through the voltage access puncture part and sampling and processing a current signal of the cable through the three-phase current transformer;
the signal processor comprises a high-voltage signal processing unit and a low-voltage signal processing unit, wherein the high-voltage signal processing unit is used for carrying out AD sampling and processing on the current signal and transmitting a processing result to the low-voltage signal processing unit through an optical fiber; the low-voltage signal processing unit is used for outputting a processing result after DA conversion and signal processing are carried out on the processing result, the high-voltage signal processing unit and the low-voltage signal processing unit both comprise voltage energy-taking modules, and the high-voltage signal processing unit and the low-voltage signal processing unit are coupled through a high-voltage capacitor.
2. The current signal detection sensor for the high-voltage overhead line according to claim 1, wherein an aviation plug is further arranged on the wire clamping shell, and the voltage access puncture part and the open type three-phase current transformer are electrically connected with the signal processor through the aviation plug.
3. The current signal detecting sensor of the high voltage overhead line according to claim 2, wherein the voltage access penetration assembly comprises a voltage access penetration portion, a threaded locking mechanism and a line pressing block; the voltage access puncturing part and the line pressing block are arranged oppositely, the voltage access puncturing part is fixed on the inner wall of the line clamping shell, a screw hole is formed in the line pressing block, and the locking mechanism penetrates through the line clamping shell and is in threaded connection with the line pressing block to drive the line pressing block to move in the direction perpendicular to the line penetrating hole of the cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011069627.4A CN112198356A (en) | 2020-10-08 | 2020-10-08 | Current signal detection sensor of high-voltage overhead line |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011069627.4A CN112198356A (en) | 2020-10-08 | 2020-10-08 | Current signal detection sensor of high-voltage overhead line |
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| CN112198356A true CN112198356A (en) | 2021-01-08 |
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| CN202011069627.4A Pending CN112198356A (en) | 2020-10-08 | 2020-10-08 | Current signal detection sensor of high-voltage overhead line |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116068262A (en) * | 2023-02-10 | 2023-05-05 | 国网江苏省电力有限公司如东县供电分公司 | Online monitoring method for resistive current of zinc oxide arrester of overhead transmission line |
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| US20130057255A1 (en) * | 2010-05-18 | 2013-03-07 | Wuhan Guoce Science & Technology Co., Ltd. | Integrated device suspended at high voltage potential for power energy metering and protection of distribution network |
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| CN105334375A (en) * | 2015-12-01 | 2016-02-17 | 国网河南省电力公司平顶山供电公司 | PT-CT combined device capable of being installed in charged mode |
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| US20130057255A1 (en) * | 2010-05-18 | 2013-03-07 | Wuhan Guoce Science & Technology Co., Ltd. | Integrated device suspended at high voltage potential for power energy metering and protection of distribution network |
| CN105004943A (en) * | 2015-06-04 | 2015-10-28 | 北京智罗盘智能电气有限公司 | Electric energy quality monitoring and electric energy metering device that can be mounted and dismounted in an electrified manner at a high-tension side |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116068262A (en) * | 2023-02-10 | 2023-05-05 | 国网江苏省电力有限公司如东县供电分公司 | Online monitoring method for resistive current of zinc oxide arrester of overhead transmission line |
| CN116068262B (en) * | 2023-02-10 | 2023-12-29 | 国网江苏省电力有限公司如东县供电分公司 | Online monitoring method for resistive current of zinc oxide arrester of overhead transmission line |
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Application publication date: 20210108 |