CN211856688U

CN211856688U - Power distribution network signal source

Info

Publication number: CN211856688U
Application number: CN201922411706.8U
Authority: CN
Inventors: 穆业森; 李鹏刚; 刘伟轩; 吴学煊
Original assignee: Tianjin Haoyuan Huineng Technology Co ltd
Current assignee: Tianjin Haoyuan Huineng Co ltd
Priority date: 2019-12-28
Filing date: 2019-12-28
Publication date: 2020-11-03
Anticipated expiration: 2029-12-28

Abstract

The utility model provides a power distribution network signal source, which comprises a box body, wherein the surface of the box body is provided with a display screen and a switch, and a circuit board, an A/D conversion circuit, a D/A conversion circuit, a phase discrimination circuit, a power supply, a power amplification circuit, a wireless communication module and a signal output module are arranged in the box body; the power supply is connected with the CPU, the display screen and the wireless communication module through a power supply circuit and used for supplying power to the CPU, the display screen and the wireless communication module; the CPU is connected with the display screen, the wireless communication module, the phase discrimination circuit, the A/D conversion circuit and the D/A conversion circuit through related pins; the D/A conversion circuit is also connected with a power amplifier circuit; the A/D conversion circuit and the power amplifier circuit are both connected with the signal output module. The utility model overcomes detection efficiency is low among the prior art, the poor defect of data accuracy.

Description

Power distribution network signal source

Technical Field

The utility model belongs to the technical field of distribution fault detection equipment, especially, relate to a distribution network signal source.

Background

In China, the power distribution network line is complex and has various branches, and once a ground fault occurs, the positioning is difficult. According to statistics, more than 95% of power failure accidents suffered by power consumers are caused by power distribution network faults. Therefore, the fault position of the power distribution network is accurately positioned, and the method has very important significance for timely isolating and repairing the fault and improving the power supply reliability.

Currently, a signal injection method is generally adopted to locate a fault. And injecting a low-frequency alternating current signal into the fault phase by the signal source, then carrying out ground inspection along the fault line by using the detector, when the current is detected in the distribution line, indicating that the fault point is at the downstream of the measuring point, and if no current exists, indicating that the fault point is at the upstream of the measuring point. Before and after the fault point, the indication of the detector has obvious great change, and the fault point is judged according to the obvious change.

The existing power distribution network signal source has the defects of low sensitivity and poor reliability.

Disclosure of Invention

In view of this, the utility model aims at providing a distribution network signal source to solve the problem mentioned in the background art.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a power distribution network signal source comprises a box body, wherein a display screen and a switch are arranged on the surface of the box body, a circuit board is arranged in the box body, and a CPU, an A/D conversion circuit, a D/A conversion circuit, a phase discrimination circuit, a power supply, a power amplification circuit, a wireless communication module and a signal output module are arranged on the circuit board;

the power supply is connected with the CPU, the display screen and the wireless communication module through a power supply circuit and used for supplying power to the CPU, the display screen and the wireless communication module;

the CPU is connected with the display screen, the wireless communication module, the phase discrimination circuit, the A/D conversion circuit and the D/A conversion circuit through related pins;

the D/A conversion circuit is also connected with a power amplifier circuit;

the A/D conversion circuit and the power amplifier circuit are both connected with the signal output module.

Further, the power supply is used for providing power for the power distribution network signal source, and the power supply comprises a lithium battery.

Further, the power supply circuit is a battery management circuit for providing power supply voltage to the power distribution network signal source.

Further, the A/D conversion circuit is used for carrying out A/D conversion on the output voltage and the output current.

Furthermore, the D/A conversion circuit and the power amplifier circuit are used for controlling the output current and the frequency.

Further, the phase discrimination circuit is used for detecting the amplitude of the current phase change.

Furthermore, the wireless communication module adopts wifi or bluetooth.

Furthermore, the display screen is used for displaying output frequency, output current, output voltage and residual capacity.

Further, the CPU is a single chip microcomputer.

Further, the single chip microcomputer is MSP430F 249.

Compared with the prior art, a distribution network signal source have following advantage:

(1) the utility model discloses a distribution network signal source is used for producing two different frequency alternating current signals, overcomes the defect that detection efficiency is low, data accuracy is poor among the prior art to realize that detection efficiency is high and data accuracy is good;

(2) the utility model discloses a wifi or blue tooth realize that intelligent terminal accepts and shows measurement information, easy operation, convenient and fast.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic diagram of a signal source of a power distribution network according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a power circuit according to an embodiment of the present invention;

fig. 3 is a circuit diagram of the single chip microcomputer according to the embodiment of the present invention;

fig. 4 is a circuit diagram of a wireless communication module according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of an A/D conversion circuit according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a power amplifier circuit according to an embodiment of the present invention.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The utility model provides a power distribution network signal source, as shown in figure 1, comprising a box body, wherein the surface of the box body is provided with a display screen and a switch, a circuit board is arranged in the box body, and the circuit board is provided with a CPU, an A/D conversion circuit, a D/A conversion circuit, a phase discrimination circuit, a power supply, a power amplification circuit, a wireless communication module and a signal output module;

the D/A conversion circuit is also connected with a power amplifier circuit;

The power supply is used for providing power for the power distribution network signal source and comprises a lithium battery.

The power supply circuit is a battery management circuit used for providing power supply voltage for the power distribution network signal source.

The A/D conversion circuit is used for carrying out A/D conversion on the output voltage and the output current.

The D/A conversion circuit and the power amplifier circuit are used for controlling the output current and frequency.

The phase discrimination circuit is used for detecting the amplitude of the current phase change.

The wireless communication module adopts wifi or bluetooth for sending frequency and voltage information to the cell-phone, and the cell-phone sends information to the high in the clouds, and another cell-phone receives data transmission to the detector from the high in the clouds.

The display screen is used for displaying output frequency, output current, output voltage and residual electric quantity.

As shown in fig. 3, the CPU of the present invention is a single chip microcomputer, and the model of the single chip microcomputer is MSP430F 249.

As shown in fig. 2, the power supply circuit of the present invention employs a voltage reduction chip with model number LM2596S and a voltage regulator with model number AMS 1117.

Fig. 4 shows a circuit diagram of the wireless communication module of the present invention, which adopts a WIFI module with model number of E103-W01.

Fig. 5 is a schematic diagram of the a/D conversion circuit of the present invention.

Fig. 6 shows a schematic diagram of a power amplifier circuit of the present invention, which adopts a power amplifier with model number of YDA 138A.

The utility model discloses produce two different frequency alternating current signal to send signal frequency and output voltage to the detector. And the detector measures the current effective values corresponding to the two different frequency characteristic signals to obtain the resistive current of the tested circuit. And sending the measurement result to the mobile phone through bluetooth or wifi, and receiving and displaying the measurement result by the user through the mobile phone APP.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a distribution network signal source, includes the box, and the box surface is equipped with display screen and switch, its characterized in that: a circuit board is arranged in the box body, and a CPU, an A/D conversion circuit, a D/A conversion circuit, a phase discrimination circuit, a power supply, a power amplification circuit, a wireless communication module and a signal output module are arranged on the circuit board;

the D/A conversion circuit is also connected with a power amplifier circuit;

2. The signal source of claim 1, wherein: the power supply is used for providing power for the power distribution network signal source and comprises a lithium battery.

3. The signal source of claim 1, wherein: the power supply circuit is a battery management circuit used for providing power supply voltage for the power distribution network signal source.

4. The signal source of claim 1, wherein: the A/D conversion circuit is used for carrying out A/D conversion on the output voltage and the output current.

5. The signal source of claim 1, wherein: the D/A conversion circuit and the power amplifier circuit are used for controlling the output current and frequency.

6. The signal source of claim 1, wherein: the phase discrimination circuit is used for detecting the amplitude of the current phase change.

7. The signal source of claim 1, wherein: and the wireless communication module adopts wifi or bluetooth.

8. The signal source of claim 1, wherein: the display screen is used for displaying output frequency, output current, output voltage and residual electric quantity.

9. The signal source of claim 1, wherein: the CPU is a single chip microcomputer.

10. The signal source for the distribution network of claim 9, wherein: the type of the single chip microcomputer is MSP430F 249.