CN209311557U - A kind of portable high-pressure based on arc laminated core is wireless current detection means - Google Patents

Abstract

The utility model provides a portable high-voltage wireless current detection device based on an arc-shaped laminated iron core, which includes two open annular iron cores installed on the high-voltage transmission line conductors, and copper induction coils are wound on the two annular iron cores. Coil, the sides of the two toroids are glued together with epoxy. The annular iron core is made of arc-shaped amorphous alloy sheets, and the opening L is smaller than the diameter d of the installed high-voltage transmission line conductor. When installing, the high-voltage transmission line conductor is inserted through the opening by using the crimping characteristics of the amorphous alloy core. The copper induction coil wound on the first annular iron core is used for energy collection, and the copper induction coil wound on the second annular iron core is used for current detection. 1) Utilizing the curling characteristics and opening electromagnetic characteristics of the amorphous alloy, the device can be directly inserted into the transmission line cable, which is convenient for installation; 2) The circuit self-energy is used for power supply, and wifi wireless data transmission realizes the portable measurement of high-voltage current .

Description

A portable high-voltage wireless current detection device based on arc-shaped laminated iron core

technical field

The utility model 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 technique

For a long time, current transformers have been used to measure the primary side current of transformers, but their large size and inconvenient installation are a great disadvantage. Conventional current transformers are all cable-through installation structures, and since the secondary side cannot be opened, the transmission line must be installed and wired before it can be energized and used, and it cannot be installed live. Moreover, its cable-through installation structure without openings makes installation very difficult.

The Chinese patent whose publication number is CN 103474223 B discloses a high-voltage equipotential open-ended current transformer, and the Chinese patent whose publication number is CN 105355406 B proposes a kind of open-ended current transformer that can be installed live. The design of quick opening and opening can be used for equipotential live installation, but the opening must be closed and installed for a short time, and it is not allowed to open for a long time. When installing, open the opening for a short time, and then quickly close it with a lock, requiring installation Accuracy, causing uncertainty to the installation.

In addition, although electronic transformers have been widely used in recent years, although electronic transformers can meet the requirements of uninterrupted power installation, their high prices cannot be applied to distribution transformers at all.

The present invention utilizes the curling characteristics of amorphous alloys to design an open current transformer that can be installed portablely, which effectively solves the problems of inconvenient installation of existing transformers and high prices of electronic transformers, and makes the high-voltage current cost-effective measurement variable. possible.

Contents of the invention

In order to solve the problems mentioned in the background technology, the utility model provides a portable high-voltage wireless current detection device based on an arc-shaped laminated iron core. Into the transmission line cable, easy to install; 2) The circuit self-energy supply is adopted, and wifi wireless data transmission realizes the portable measurement of high-voltage current.

In order to achieve the above object, the utility model adopts the following technical solutions to realize:

A portable high-voltage wireless current detection device based on arc-shaped laminated iron cores, including two open annular iron cores installed on high-voltage transmission line conductors: the first annular iron core and the second annular iron core, and the two annular iron cores Copper induction coils are wound on the cores, and the sides of the two annular iron cores are glued together with epoxy resin to form a double annular structure.

The first annular iron core and the second annular iron core are stacked by arc-shaped amorphous alloy sheets, and epoxy resin is poured after stacking. The openings of the first annular iron core and the second annular iron core L is slightly smaller than the diameter d of the installed high-voltage transmission line conductor. When installing, the two open annular iron cores use the crimping characteristics of the amorphous alloy core to insert the high-voltage transmission line conductor from the opening.

The copper induction coil wound on the first annular iron core is used for energy harvesting and is an energy harvesting coil, and the copper induction coil wound on the second annular iron core is used for current detection and is a detection coil.

It also includes a current detection circuit board, which is arranged between the first annular iron core and the second annular iron core, and is connected to the voltage output terminal V1 of the energy-taking coil and the voltage output terminal V2 of the detection coil through wires.

The current detection circuit board includes a SOC-WIFI chip and a power supply circuit and an A/D conversion chip connected to its port, and the voltage output terminal V1 of the energy-taking coil is the SOC-WIFI chip and the A/D conversion chip through the power supply circuit. The A/D conversion chip is powered, the detection signal of the voltage output terminal V2 of the detection coil is connected to the input terminal of the A/D conversion chip, and the output terminal of the A/D conversion chip is connected to the signal input port of the SOC-WIFI chip, The SOC-WIFI chip is an on-chip SOC chip integrated with WIFI function, which converts the voltage signal V2 into a current detection value and sends it to the WIFI terminal equipment of the maintenance personnel through the WIFI network.

The power supply circuit includes a rectifier circuit, a filter circuit and a voltage stabilizing circuit sequentially from the input end to the output end.

Compared with the prior art, the beneficial effects of the utility model are:

1) Use the crimping characteristics of the amorphous alloy core to insert the high-voltage transmission line wire from the opening, so that the device can be directly inserted into the transmission line cable, without disassembling the transmission cable, and easy to install;

2) The opening L is smaller than the diameter d of the installed high-voltage transmission line conductor, so as to ensure that the device cannot fall off the cable after installation;

3) Adopt the open iron core and induction coil structure, adopt the method of measuring the open voltage signal, use the SOC control chip to convert the voltage into current in proportion, and do not use the traditional current acquisition mode, so that the device can be open for a long time without closing;

4) The induction coil on the first annular iron core is used as the energy harvesting coil, the detection circuit is powered by itself, the wifi wireless data transmission, the maintenance personnel check the detection data through the WIFI terminal (mobile phone, etc.), and the portable measurement of high voltage current is realized.

Description of drawings

Fig. 1 is a double ring structure diagram of the utility model;

Fig. 2 is the structural diagram of the annular iron core of the present utility model and the same induction coil and its installation on the wire of the transmission line;

Fig. 3 is a stacked structure diagram of arc-shaped amorphous alloy sheets inside the annular iron core of the present invention;

Fig. 4 is a circuit structure diagram of the current detection circuit board of the present invention.

Among them: 1-first annular iron core 2-second annular iron core 3-induction coil for energy harvesting 4-induction coil for detection 5-epoxy resin 6-current detection circuit board 7-wire 8-annular iron core opening 9 - Power transmission line conductor 10 - Arc-shaped amorphous alloy sheet 11 - Epoxy resin inside the ring iron core 12 - SOC-WIFI chip (MT7681) 13 - Power supply circuit 14 - A/D conversion chip.

Detailed ways

The specific implementation modes provided by the present utility model will be described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1-3, a portable high-voltage wireless current detection device based on arc-shaped laminated iron cores includes two open annular iron cores installed on high-voltage transmission line conductors: the first annular iron core 1 and the second Two annular iron cores 2, copper induction coils 3 and 4 are wound on the two annular iron cores, the sides of the two annular iron cores are bonded together with epoxy resin 5 to form a double annular structure.

As shown in Figure 3, the first annular iron core 1 and the second annular iron core 2 are formed by stacking arc-shaped amorphous alloy sheets 10, and epoxy resin 11 is poured after stacking. The opening size L of the opening 8 of the iron core 1 and the second annular iron core 2 is slightly smaller than the diameter d of the installed high-voltage transmission line conductor 9. When installing, the two open annular iron cores 1 and 2 utilize the crimping of the amorphous alloy core Features Insert the wire 9 of the high-voltage transmission line through the opening 8.

When the sides of two annular iron cores 1 and 2 are bonded together with epoxy resin 5, consider the elasticity of epoxy resin, adjust the proportion of silicon micropowder, epoxy resin and curing agent, so that the elasticity of epoxy resin 5 is suitable for the first ring. The ductility requirements of the core 1 and the second annular core 2.

As shown in Figure 1, the copper induction coil 3 wound on the first annular iron core 1 is used for energy acquisition, and is the energy acquisition coil 3, the voltage at the output end is V1, and the copper induction coil 3 wound on the second annular iron core 2 is used for energy acquisition. The copper induction coil 4 is used for current detection, which is the detection coil 4, and the voltage at the output terminal is V2.

As shown in Figure 1, the portable high-voltage wireless current detection device based on the arc-shaped laminated iron core also includes a current detection circuit board 5, and the current detection circuit board 5 is arranged on the first annular iron core 1 and the second annular iron core 2, connected to the voltage output terminal V1 of the copper induction coil 3 and the voltage output terminal V2 of the copper induction coil 4 through the wire 7.

As shown in Figure 4, described electric current detection circuit board 5 comprises SOC-WIFI chip 12 (MT7681) and the power supply circuit 13 and A/D conversion chip 14 that are connected with its port, described energy-taking coil 3 The voltage output terminal V1 supplies power for the SOC-WIFI chip 12 and the A/D conversion chip 14 through the power supply circuit 13, and 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. , access 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 with integrated WIFI function, and the SOC-WIFI chip 12 converts the voltage signal The resulting current detection value is sent to the WIFI terminal equipment of the maintenance personnel through the WIFI network.

As shown in FIG. 4 , the power supply circuit 13 includes a rectifier circuit (rectifier bridge ZL), a filter circuit (filter capacitor C2) and a voltage regulator circuit (LT1963E regulator chip) sequentially from the input terminal to the output terminal.

The above embodiments are implemented on the premise of the technical solution of the present utility model, and detailed implementation methods and specific operation processes are given, but the protection scope of the present utility model is not limited to the above-mentioned embodiments. The methods used in the above examples are conventional methods unless otherwise specified.

Claims (5)

1. A portable high-voltage wireless current detection device based on an arc-shaped laminated iron core, characterized in that it comprises two open annular iron cores installed on the high-voltage transmission line conductor: the first annular iron core and the second annular iron core Core, copper induction coils are wound on the two annular iron cores, and the sides of the two annular iron cores are glued together with epoxy resin to form a double annular structure; The first annular iron core and the second annular iron core are stacked by arc-shaped amorphous alloy sheets, and epoxy resin is poured after stacking. The openings of the first annular iron core and the second annular iron core L is smaller than the diameter d of the installed high-voltage transmission line wire. When installing, the two open annular iron cores use the crimping characteristics of the amorphous alloy iron core to insert the high-voltage transmission line wire from the opening; The copper induction coil wound on the first annular iron core is used for energy harvesting and is an energy harvesting coil, and the copper induction coil wound on the second annular iron core is used for current detection and is a detection coil. 2. A portable high-voltage wireless current detection device based on an arc-shaped laminated iron core according to claim 1, further comprising a current detection circuit board arranged on the first annular iron core and the second ring-shaped iron core. Between the two annular iron cores, the voltage output terminal V1 of the energy-taking coil and the voltage output terminal V2 of the detection coil are connected through wires. 3. A portable high-voltage wireless current detection device based on an arc-shaped laminated iron core according to claim 2, wherein the current detection circuit board includes a SOC-WIFI chip and a power supply connected to its port Power supply circuit and A/D conversion chip, the voltage output terminal V1 of the energy-taking coil supplies power for the SOC-WIFI chip and the A/D conversion chip through the power supply circuit, and the detection signal of the voltage output terminal V2 of the detection coil Connect to the input terminal of the A/D conversion chip, and connect to the signal input port of the SOC-WIFI chip through the output terminal of the A/D conversion chip. 4. A kind of portable high-voltage wireless current detection device based on arc-shaped laminated iron core according to claim 3, it is characterized in that, described SOC-WIFI chip is the on-chip SOC chip of integrated WIFI function, and it will voltage signal V2 is converted into a current detection value and sent to the maintenance personnel's WIFI terminal equipment through the WIFI network. 5. A portable high-voltage wireless current detection device based on an arc-shaped laminated iron core according to claim 3, wherein the power supply circuit includes a rectifier circuit, a filter circuit and a Regulator circuit.