CN110568244A - A primary and secondary fusion voltage and current integrated sensor - Google Patents

Abstract

The invention discloses a primary and secondary fusion voltage and current integrated sensor, which relates to the technical field of primary and secondary fusion equipment of the State Grid. Sensors, voltage sensors, and current sensors; the body is also provided with a current terminal electrically connected to the outdoor high-voltage line and a wire output port; the current sensor is electrically connected to the current terminal and used to output phase current sampling signals, the The electric sensor is electrically connected to the current terminal and is used to output a standard voltage of 220v. The voltage sensor is electrically connected to the current terminal and is used to output the phase voltage sampling signal. The present invention can simultaneously output the phase voltage sampling signal, the phase current sampling signal, As well as power supply function, it has the advantages of simple structure, stable wiring and cables, and convenient assembly.

Description

A primary and secondary fusion voltage and current integrated sensor

technical field

The invention relates to the technical field of primary and secondary fusion equipment of the State Grid, and more specifically, it relates to a primary and secondary fusion voltage and current integrated sensor.

Background technique

In the construction of distribution network automation system, the problem of power acquisition of automation devices has always been a major bottleneck in the upgrading and transformation of distribution network lines. Some use electromagnetic voltage transformers to obtain power, some use current transformers to obtain power, and some The use of solar power generation devices to obtain electricity requires either large investment in implementation and application, or complex and unreliable wiring, and may be affected by external factors such as operating environment, climate change, and line load, which limits the development of distribution network automation. At the same time, in the prior art, each component for taking power is a split structure, which realizes the functions of outputting phase current sampling signals, phase voltage sampling signals and power supply respectively.

However, the way in which each component is arranged separately will lead to weak stability of the wiring line and inconvenient assembly and installation.

Contents of the invention

Aiming at the deficiencies in the prior art, the present invention provides a primary and secondary fusion voltage and current integrated sensor, which can simultaneously output phase voltage sampling signals, phase current sampling signals, and power supply functions, and has a simple structure and stable wiring cables. , The advantages of easy assembly.

In order to achieve the above object, the present invention provides the following technical solutions: a primary-secondary fusion voltage and current integrated sensor, including a body connected to an outdoor high-voltage line, and a power-taking sensor, a voltage sensor, and a current sensor are arranged in the body. sensor; the body is also provided with a current terminal electrically connected to the outdoor high-voltage line and a wire output port; the current sensor is electrically connected to the current terminal and is used to output a phase current sampling signal, and the power sensor is electrically connected to the current The terminal is used to output a standard voltage of 220v, and the voltage sensor is electrically connected to the current terminal and used to output a phase voltage sampling signal.

By adopting the above technical solution, the volume of the power-taking sensor is small. After installing the power-taking sensor, voltage sensor, and current sensor in the same body, it will be installed on the outdoor high-voltage line through the body, which reduces the difficulty of wiring lines. , improve the stability of the wiring line, and the assembly and installation are convenient, only one body needs to be installed.

The present invention is further set as follows: the power-taking sensor includes a capacitor component and a transformer, the capacitor component includes a capacitor C3 and a capacitor C4 arranged in series, the positive pole of the capacitor C3 is coupled to the current terminal, and the negative pole of the capacitor C4 is coupled to At the ground terminal, the connection point between the capacitor C3 and the capacitor C4 is coupled to the output terminal of the transformer, and the transformer outputs a standard voltage of 220v.

By adopting the above technical scheme and using the principle of voltage division of series capacitors, the large voltage is divided into relatively small voltages, and then the standard voltage of 220v is output through the transformer. Compared with the original method of using large iron core and large winding, this structure setting, This power-taking sensor has the advantage of small size.

The present invention is further set as: the capacitor component adopts a high-voltage ceramic capacitor.

By adopting the above technical solution, it has the advantages of large working current and strong anti-interference ability.

The present invention is further provided that: a fuse is connected in series between the negative pole of the capacitor component and the input end of the transformer.

By adopting the above technical solution, when the current is too large, the fuse will be blown to protect the transformer and the high-voltage capacitor.

The present invention is further set as: a discharge tube is connected in series between the ground wire of the transformer and the input end of the transformer.

By adopting the above technical solution, when the voltage rises suddenly, such as electric shock, the discharge tube is turned on, realizing the conduction between the large current and the ground, and protecting the high-voltage capacitor and the transformer.

The present invention is further provided that: the current sensor is arranged in a concave shape, and the voltage sensor is located on a side away from the current sensor in the body.

By adopting the above technical solution, the distance between the voltage sensor and the current sensor is increased as much as possible, and the mutual interference between the voltage sensor and the current sensor is reduced.

The present invention is further configured as follows: the body is provided with arc-shaped grooves for placing outdoor high-voltage wires.

By adopting the above-mentioned technical scheme, it is convenient to place the outdoor high-voltage line, and it is also convenient to squeeze the outdoor high-voltage line with the conductive plate later, so as to ensure the stable electrical connection between the conductive plate and the outdoor high-voltage line, and then the conductive plate is electrically connected to the current terminal.

The present invention is further set as: the wire output port of the body is provided with a waterproof plug.

By adopting the above technical scheme, the output ends of the power sensor, the voltage sensor, and the current sensor are all connected by wire cables, and the wire cables are delayed to the outside of the body through the waterproof plug on the wire output port to play a waterproof role.

In summary, the present invention installs the power sensor, voltage sensor, and current sensor in the same body, and only needs to install the whole body on the outdoor high-voltage line to obtain the power supply function, phase voltage sampling signal, and phase current sampling Signal, and the power sensor adopts the principle of capacitive voltage division to input to the transformer, and then the transformer outputs 220v standard voltage, which has the effect of reducing the entire volume.

Description of drawings

Fig. 1 is a partial structure schematic diagram of the present invention;

Fig. 2 is a schematic diagram of a local structure highlighting the power-taking sensor in the present invention;

Fig. 3 is a partial structural schematic diagram highlighting the positions of the voltage sensor and the current sensor in the present invention;

Fig. 4 is a partial structural schematic diagram of a highlighted current sensor in the present invention;

Fig. 5 is a schematic diagram of the circuit principle of the voltage part in the present invention.

Reference signs: 1. Body; 2. Current terminal; 3. Arc slot; 4. Electricity sensor; 5. Voltage sensor; 6. Current sensor; 7. Capacitor component; 8. Protection adjustment part; 9. Transformer ; 10. Insurance tube; 11. Discharge tube; 12. Wire output port; 13. Waterproof plug.

Detailed ways

The present invention will be further described with reference to the accompanying drawings.

This embodiment discloses a primary-secondary fusion voltage and current integrated sensor, as shown in Figure 1 and Figure 2, which includes a body 1 connected to an outdoor high-voltage line, and the upper end of the body 1 is provided with a current connection electrically connected to the outdoor high-voltage line End 2, the body 1 is provided with an arc-shaped groove 3 for placing the outdoor high-voltage wire. A conductive plate (not shown in the figure), the electrical connection between the conductive plate and the current terminal 2 is realized through conductive bolts, and the conductive plate squeezes the outdoor high-voltage line to the arc groove 3, thereby realizing the connection between the outdoor high-voltage line and the current terminal 2 The electrical connection between them is stable. Multiple current terminals 2 can be provided, some of the current terminals 2 are used to conduct the conductive plate, and some of the current terminals 2 are used to connect and fix external devices. The present application is provided with four current terminals 2, two of which are used to connect and fix external devices, and two current terminals 2 are used to conduct conductive plates.

As shown in Figure 2 and Figure 3, the body 1 is provided with a power sensor 4, a voltage sensor 5, and a current sensor 6; the current sensor 6 is electrically connected to the current terminal 2 and is used to output phase current sampling signals, and the power sensor 4 The voltage sensor 5 is electrically connected to the current terminal 2 and used to output a phase voltage sampling signal.

As shown in Fig. 2 and Fig. 5, the power-taking sensor 4 includes a capacitive component 7 and a protection adjustment part 8. The protection adjustment part 8 includes a transformer 9, and the output terminal of the transformer 9 outputs a standard voltage of 220v. Capacitor component 7 includes capacitor C3 and capacitor C4 arranged in series, the positive pole of capacitor C3 is coupled to current terminal 2, the negative pole of capacitor C4 is coupled to ground terminal, and the connection point between capacitor C3 and capacitor C4 is coupled to transformer 9 output terminal, the standard voltage of transformer 9 output 220v. Using the principle of voltage division of series capacitors, the large voltage is divided into relatively small voltages, and then the standard voltage of 220v is output through the transformer 9. Compared with the original method of using large cores and large windings, this kind of power sensor 4 has the advantage of small size. The capacitor adopts high-voltage ceramic capacitor, which has the advantages of large working current and strong anti-interference ability. Ceramic capacitors also have the characteristics of small changes in accuracy due to the influence of ambient temperature. The maximum error change is less than 0.2% in the full temperature range of -40°C~70°C, which fully meets the temperature variation index requirements of 0.5-level sensors stipulated in the standard.

As shown in Figure 2, the protection adjustment part 8 also includes a fuse 10 and a discharge tube 11; the fuse 10 is connected in series between the negative pole of the capacitor assembly 7 and the input end of the transformer 9, and when the current is too large, the fuse 10 will Burning out plays the role of protecting the transformer 9 and the high-voltage capacitor. The discharge tube 11 is connected in series between the ground wire of the transformer 9 and the input terminal of the transformer 9. When the voltage rises suddenly, such as an electric shock, the discharge tube 11 is turned on to realize the conduction between the large current and the ground, and protect the high-voltage capacitor and the ground. The role of the transformer 9.

As shown in Figure 3 and Figure 4, the current sensor 6 is set in a concave shape, and the voltage sensor 5 is located on the side away from the current sensor 6 in the body 1, and the distance between the voltage sensor 5 and the current sensor 6 is reduced as much as possible. Large, reducing the mutual interference of the voltage sensor 5 and the current sensor 6.

As shown in Figure 2 and Figure 3, the lower end of the main body 1 is integrally formed with a wire output port 12, and the wire output port 12 is provided with a waterproof plug 13, the output end of the power sensor 4, the voltage sensor 5, and the current sensor 6 and the grounding end They are all connected by wire cables, and the wire cables are delayed to the outside of the body 1 through the waterproof plug 13 on the wire output port 12 to play a waterproof role.

The specific effect is as follows:

The power-taking sensor 4 is small in size. After installing the power-taking sensor 4, voltage sensor 5, and current sensor 6 in the same body 1, it will be installed on the outdoor high-voltage line through the body 1, which reduces the difficulty of wiring lines , improving the stability of the wiring line, and the assembly and installation are convenient, only one body 1 needs to be installed.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the design concept of the present invention shall be included in the protection scope of the present invention within.

Claims (8)

1. the utility model provides a secondary fuses voltage and current integration sensor, is including connecting body (1) on outdoor high-voltage line, characterized by: the body (1) is internally provided with a power taking sensor (4), a voltage sensor (5) and a current sensor (6); the body (1) is also provided with a current terminal (2) electrically connected with an outdoor high-voltage line and a lead output port (12); the current sensor (6) is electrically connected to the current terminal (2) and used for outputting phase current sampling signals, the electricity taking sensor (4) is electrically connected to the current terminal (2) and used for outputting 220v standard voltage, and the voltage sensor (5) is electrically connected to the current terminal (2) and used for outputting phase voltage sampling signals.

2. A secondary fusion voltage-current integrated sensor as claimed in claim 1, wherein: the electricity-taking sensor (4) comprises a capacitor assembly (7) and a transformer (9), wherein the capacitor assembly (7) comprises a capacitor C3 and a capacitor C4 which are arranged in series, the anode of the capacitor C3 is coupled to a current terminal (2), the cathode of the capacitor C4 is coupled to a ground terminal, the connection point between the capacitor C3 and the capacitor C4 is coupled to the output end of the transformer (9), and the transformer (9) outputs 220v of standard voltage.

3. A secondary fusion voltage-current integrated sensor as claimed in claim 2, wherein: the capacitor assembly (7) adopts a high-voltage ceramic capacitor.

4. A secondary fusion voltage-current integrated sensor as claimed in claim 2, wherein: and a protective tube (10) is connected in series between the negative electrode of the capacitor assembly (7) and the input end of the transformer (9).

5. A secondary fusion voltage-current integrated sensor as claimed in claim 2, wherein: and a discharge tube (11) is connected in series between the grounding wire of the transformer (9) and the input end of the transformer (9).

6. A secondary fusion voltage-current integrated sensor as claimed in claim 1, wherein: the current sensor (6) is arranged in a concave shape, and the voltage sensor (5) is positioned on one side far away from the current sensor (6) in the body (1).

7. A secondary fusion voltage-current integrated sensor as claimed in claim 1, wherein: the body (1) is provided with an arc-shaped groove (3) for placing an outdoor high-voltage wire.

8. A secondary fusion voltage-current integrated sensor as claimed in claim 7, wherein: and a waterproof plug (13) is arranged on the lead output port (12) of the body (1).