CN109387690B - Portable high-voltage wireless current detection device based on arc laminated iron core - Google Patents
Portable high-voltage wireless current detection device based on arc laminated iron core Download PDFInfo
- Publication number
- CN109387690B CN109387690B CN201811484400.9A CN201811484400A CN109387690B CN 109387690 B CN109387690 B CN 109387690B CN 201811484400 A CN201811484400 A CN 201811484400A CN 109387690 B CN109387690 B CN 109387690B
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- Prior art keywords
- iron core
- annular iron
- voltage
- current detection
- transmission line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 238000001514 detection method Methods 0.000 title claims abstract description 44
- 230000005540 biological transmission Effects 0.000 claims abstract description 29
- 230000006698 induction Effects 0.000 claims abstract description 18
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910000808 amorphous metal alloy Inorganic materials 0.000 claims abstract description 14
- 229910052802 copper Inorganic materials 0.000 claims abstract description 14
- 239000010949 copper Substances 0.000 claims abstract description 14
- 239000003822 epoxy resin Substances 0.000 claims abstract description 13
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 13
- 239000004020 conductor Substances 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 238000003475 lamination Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 10
- 238000005259 measurement Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011863 silicon-based powder Substances 0.000 description 1
Classifications
-
- 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
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/263—Fastening parts of the core together
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
- H01F38/30—Constructions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
- H01F38/30—Constructions
- H01F2038/305—Constructions with toroidal magnetic core
Abstract
The invention provides a portable high-voltage wireless current detection device based on an arc-shaped laminated iron core, which comprises two annular iron cores with openings, wherein the annular iron cores are arranged on a high-voltage transmission line conductor, copper induction coils are wound on the two annular iron cores, and the side surfaces of the two annular iron cores are adhered together by epoxy resin. The annular iron core is formed by stacking arc amorphous alloy sheets, the opening L is smaller than the diameter d of the installed high-voltage transmission line wire, and when the annular iron core is installed, the high-voltage transmission line wire is sleeved from the opening by utilizing the curling characteristic of the amorphous alloy iron core. The copper induction coil wound on the first annular iron core is used for energy taking, and the copper induction coil wound on the second annular iron core is used for current detection. 1) By utilizing the curling characteristic and the opening electromagnetic characteristic of the amorphous alloy, the device can be directly sleeved into a power transmission line cable, and the installation is convenient; 2) The circuit is adopted to automatically take energy to supply power, wifi wireless data transmission is achieved, and portable measurement of high-voltage current is achieved.
Description
Technical Field
The invention relates to the technical field of high-voltage transmission line current measurement, in particular to a portable high-voltage wireless current detection device based on an arc-shaped laminated iron core.
Background
The measurement of primary side current of a transformer has been carried out by using a current transformer for a long time, but the current transformer has a large size and is inconvenient to install, which is a great disadvantage. The conventional current transformer is of a cable penetrating installation structure, and because the secondary side cannot be opened, the power transmission line can be electrified for use after the installation wiring is completed, and the power transmission line cannot be installed in an electrified manner. And, its cable-through mounting structure without openings makes the mounting difficult.
The chinese patent with publication No. CN 103474223B discloses a high-voltage equipotential open current transformer, and the chinese patent with publication No. CN 105355406B proposes an open current transformer capable of being installed in an electrified manner, and both adopt a mechanical design of opening quickly, so that equipotential electrified installation can be performed, but the opening must be installed in a short time in a closed manner, long-time opening is not allowed, during installation, the opening is opened in a short time, then the opening is closed quickly by a lock catch, and installation accuracy is required, thus causing uncertainty to the installation.
In addition, although electronic transformers can meet the requirement of uninterrupted power installation in a large number of applications in recent years, the high price of the electronic transformers cannot be applied to distribution transformers at all.
The invention designs the portable opening current transformer by utilizing the curling characteristic of the amorphous alloy, effectively solves the problems that the existing transformer is inconvenient to install and the electronic transformer is expensive, and enables the high-cost performance measurement of high-voltage current to become possible.
Disclosure of Invention
In order to solve the problems in the background art, the invention provides a portable high-voltage wireless current detection device based on an arc laminated iron core, which is characterized in that 1) the device can be directly sleeved into a power transmission line cable by utilizing the curling property and the opening electromagnetic property of amorphous alloy, and is convenient to install; 2) The circuit is adopted to automatically take energy to supply power, wifi wireless data transmission is achieved, and portable measurement of high-voltage current is achieved.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
a portable high-voltage wireless current detection device based on arc laminated iron cores comprises two annular iron cores with openings, wherein the annular iron cores are arranged on a high-voltage transmission line guide wire: the copper induction coil is wound on the first annular iron core and the second annular iron core, and the side surfaces of the two annular iron cores are adhered together by epoxy resin to form a double-annular structure.
The first annular iron core and the second annular iron core are formed by stacking arc amorphous alloy sheets, epoxy resin is poured after stacking, the opening L of the first annular iron core and the second annular iron core is slightly smaller than the diameter d of the installed high-voltage transmission line wire, and when the high-voltage transmission line wire is installed, the annular iron cores with the two openings sleeve the high-voltage transmission line wire from the opening by utilizing the curling characteristic of the amorphous alloy iron cores.
The copper induction coil wound on the first annular iron core is used for energy taking and is an energy taking coil, the copper induction coil wound on the second annular iron core is used for current detection and is a detection coil.
The device further comprises a current detection circuit board, wherein the current detection circuit board is arranged between the first annular iron core and the second annular iron core and is connected with a voltage output end V1 of the energy taking coil and a voltage output end V2 of the detection coil through wires.
The current detection circuit board comprises an SOC-WIFI chip, a power supply circuit and an A/D conversion chip, wherein the power supply circuit and the A/D conversion chip are connected with the power supply circuit, a voltage output end V1 of the energy taking coil supplies power for the SOC-WIFI chip and the A/D conversion chip through the power supply circuit, a detection signal of a voltage output end V2 of the detection coil is connected to an input end of the A/D conversion chip, an output end of the A/D conversion chip is connected to a signal input port of the SOC-WIFI chip, the SOC-WIFI chip is an on-chip SOC chip integrating a WIFI function, and the SOC-WIFI chip converts a voltage signal V2 into a current detection value and sends the current detection value to WIFI terminal equipment of an maintainer through a WIFI network.
The power supply circuit comprises a rectifying circuit, a filter circuit and a voltage stabilizing circuit from an input end to an output end.
Compared with the prior art, the invention has the beneficial effects that:
1) The high-voltage transmission line wires are sleeved from the openings by utilizing the curling characteristic of the amorphous alloy iron core, so that the device is directly sleeved into the transmission line cable without disassembling the transmission cable, and the installation is convenient;
2) The opening L is smaller than the diameter d of the installed high-voltage transmission line wire, so that the device cannot fall off from the cable after being installed;
3) The open iron core and induction coil structure is adopted, the mode of measuring open voltage signals is adopted, the SOC control chip is used for converting voltage into current in proportion, and a traditional current acquisition mode is not adopted, so that the device can be opened for a long time without closing;
4) Adopt the induction coil on the first annular iron core as getting can the coil, detection circuitry is from getting can the power supply, WIFI wireless data transmission, and maintainer looks over detection data through WIFI terminal (cell-phone etc.), has realized the portable measurement of high-voltage current.
Drawings
FIG. 1 is a double annular block diagram of the present invention;
fig. 2 is a structural view of the toroidal core and the homoinductive coil of the present invention and their installation on the transmission line conductors;
FIG. 3 is a view showing a stacked structure of arc amorphous alloy sheets inside a toroidal core according to the present invention;
fig. 4 is a circuit configuration diagram of the current detection circuit board of the present invention.
Wherein: 1-a first annular iron core 2-a second annular iron core 3-an energy taking induction coil 4-a detection induction coil 5-epoxy resin 6-a current detection circuit board 7-a wire 8-an annular iron core opening 9-a power transmission line wire 10-an arc amorphous alloy sheet 11-an epoxy resin 12-SOC-WIFI chip (MT 7681) 13-a power supply circuit 14-an A/D conversion chip inside the annular iron core.
Detailed Description
The following detailed description of the embodiments of the invention is provided with reference to the accompanying drawings.
As shown in fig. 1-3, a portable high-voltage wireless current detection device based on an arc laminated iron core includes two open annular iron cores installed on a high-voltage transmission line conductor: the first annular iron core 1 and the second annular iron core 2 are wound with copper induction coils 3 and 4, and the side surfaces of the two annular iron cores are adhered together by epoxy resin 5 to form a double-annular structure.
As shown in fig. 3, the first annular iron core 1 and the second annular iron core 2 are formed by stacking arc amorphous alloy sheets 10, epoxy resin 11 is poured after stacking, the opening size L of the opening 8 of the first annular iron core 1 and the second annular iron core 2 is slightly smaller than the diameter d of the installed high-voltage transmission line wire 9, and when the high-voltage transmission line wire 9 is installed, the annular iron cores 1 and 2 with the two openings sleeve the high-voltage transmission line wire 9 from the opening 8 by utilizing the curling characteristic of the amorphous alloy iron cores.
When the side surfaces of the two annular iron cores 1 and 2 are adhered together by epoxy resin 5, the proportion of the silicon powder, the epoxy resin and the curing agent is adjusted in consideration of the elasticity of the epoxy resin, so that the elasticity of the epoxy resin 5 is suitable for the ductility requirements of the first annular iron core 1 and the second annular iron core 2.
As shown in fig. 1, the copper induction coil 3 wound on the first annular iron core 1 is used for energy taking, the voltage at the output end is V1, the copper induction coil 4 wound on the second annular iron core 2 is used for current detection, and the voltage at the output end is V2, which is the detection coil 4.
As shown in fig. 1, the portable high-voltage wireless current detection device based on the arc laminated iron core further comprises a current detection circuit board 5, wherein the current detection circuit board 5 is arranged between the first annular iron core 1 and the second annular iron core 2 and is connected with a voltage output end V1 of the copper induction coil 3 and a voltage output end V2 of the copper induction coil 4 through a wire 7.
As shown in fig. 4, the current detection circuit board 5 includes an SOC-WIFI chip 12 (MT 7681), a power supply circuit 13 and an a/D conversion chip 14 connected to the ports thereof, the voltage output terminal V1 of the energy-taking coil 3 supplies power to the SOC-WIFI chip 12 and the a/D conversion chip 14 through the power supply circuit 13, the detection signal of the voltage output terminal V2 of the detection coil 4 is connected to the input terminal I of the a/D conversion chip 14, and is connected to the signal input port GPIO of the SOC-WIFI chip 12 through the output terminal Q of the a/D conversion chip 14, the SOC-WIFI chip 12 is an on-chip SOC chip integrating the WIFI function, and the SOC-WIFI chip 12 converts the voltage signal into a current detection value and sends the current detection value to the WIFI terminal device of the maintainer through the WIFI network.
As shown in fig. 4, the power supply circuit 13 includes, in order from the input end to the output end, a rectifying circuit (rectifying bridge ZL), a filter circuit (filter capacitor C2), and a voltage stabilizing circuit (LT 1963E voltage stabilizing chip).
The above examples are implemented on the premise of the technical scheme of the present invention, and detailed implementation manners and specific operation processes are given, but the protection scope of the present invention is not limited to the above examples. The methods used in the above examples are conventional methods unless otherwise specified.
Claims (1)
1. Portable high-voltage wireless current detection device based on arc lamination iron core, its characterized in that includes two open-ended annular iron cores of installing on high-voltage transmission line conductor: the copper induction coils are wound on the first annular iron core and the second annular iron core, and the side surfaces of the two annular iron cores are bonded together by epoxy resin to form a double-annular structure;
the first annular iron core and the second annular iron core are formed by stacking arc amorphous alloy sheets, epoxy resin is poured after stacking, the opening size L of the openings of the first annular iron core and the second annular iron core is smaller than the diameter d of the installed high-voltage transmission line wire, and when the high-voltage transmission line wire is installed, the annular iron cores with the two openings sleeve the high-voltage transmission line wire from the openings by utilizing the curling characteristic of the amorphous alloy iron cores;
the copper induction coil wound on the first annular iron core is used for energy taking and is an energy taking coil, the copper induction coil wound on the second annular iron core is used for current detection and is a detection coil;
the current detection circuit board is arranged between the first annular iron core and the second annular iron core and is connected with a voltage output end V1 of the energy taking coil and a voltage output end V2 of the detection coil through a wire;
the current detection circuit board comprises an SOC-WIFI chip, a power supply circuit and an A/D conversion chip, wherein the power supply circuit and the A/D conversion chip are connected with the port of the SOC-WIFI chip, the voltage output end V1 of the energy taking coil supplies power for the SOC-WIFI chip and the A/D conversion chip through the power supply circuit, the detection signal of the voltage output end V2 of the detection coil is connected to the input end of the A/D conversion chip, and the output end of the detection coil is connected to the signal input port of the SOC-WIFI chip through the output end of the A/D conversion chip;
the SOC-WIFI chip is an on-chip SOC chip integrating the WIFI function, converts a signal of the voltage output end V2 into a current detection value, and sends the current detection value to WIFI terminal equipment of an maintainer through a WIFI network;
the power supply circuit comprises a rectifying circuit, a filter circuit and a voltage stabilizing circuit from an input end to an output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811484400.9A CN109387690B (en) | 2018-12-06 | 2018-12-06 | Portable high-voltage wireless current detection device based on arc laminated iron core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811484400.9A CN109387690B (en) | 2018-12-06 | 2018-12-06 | Portable high-voltage wireless current detection device based on arc laminated iron core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109387690A CN109387690A (en) | 2019-02-26 |
| CN109387690B true CN109387690B (en) | 2024-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811484400.9A Active CN109387690B (en) | 2018-12-06 | 2018-12-06 | Portable high-voltage wireless current detection device based on arc laminated iron core |
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| CN (1) | CN109387690B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111948488A (en) * | 2020-07-23 | 2020-11-17 | 广东电网有限责任公司 | Distribution cable fault monitoring system and use method |
| CN114076877B (en) * | 2021-11-19 | 2023-12-19 | 国网辽宁省电力有限公司鞍山供电公司 | High-voltage insulation state analysis method and device based on electromagnetic field big data |
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| CN109387690A (en) | 2019-02-26 |
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