CN103018524A - Electrification display detection device of high-voltage power system - Google Patents

Abstract

The invention discloses a detection device for a power system, in particular to a live display detection device for a high-voltage power system, which includes a sensing module (C), a lightning protection module (B), a filter module (L), and an overvoltage absorbing module connected in sequence. Module (G), signal conversion module (X) and single-chip microcomputer control module (D). The function of the present invention is to realize the accurate judgment of whether the high-voltage and ultra-high-voltage power systems are electrified, to lock the corresponding equipment safely, to digitally display the voltage value of the power grid, and to indicate whether electrified, and the debugging is very simple, intuitive and accurate, with internal The environment temperature adjustment function is connected with the main control computer to realize the function of remote information transmission. It ensures the safety of power system equipment and personal safety, and ensures the safe operation of the power system.

Description

A live display and detection device for a high-voltage power system

technical field

The invention relates to a detection device of a power system, in particular to a detection device for a live display of a high-voltage power system.

Background technique

In high-voltage and ultra-high-voltage power systems, it is very important to ensure safe production. Therefore, it is required to accurately judge whether the system is live or not, and to lock the corresponding equipment safely, so as to ensure the safety of power system equipment and personal safety, and ensure the safe operation of the power system.

Contents of the invention

The purpose of the present invention is to provide a high-voltage power system electrification display and detection device to solve the problem of inability to accurately determine whether equipment is electrified in high-voltage and ultra-high-voltage power systems.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions: a live display detection device for a high-voltage power system, including a sensing module, a lightning protection module, a filter module, an overvoltage absorption module, a signal conversion module and a single-chip microcomputer control module connected in sequence , wherein the signal conversion module is connected on the A/D port 1 of the single-chip control module, and the mouth 1 and port 2 on the single-chip control module are connected with a digital display alarm module, and the A/D on the single-chip control module Port 2 is connected with an ambient temperature detection module, the D/A port on the single-chip control module is connected with an electric meter indicator module, port 3 on the single-chip control module is connected with a relay output module, and ports 4 and 1 on the single-chip control module The port 5 is connected with a communication module, and the communication module is connected with the main control computer module, the port 6 on the single-chip control module is connected with an ultra-low temperature control module, and the ports 7-11 of the single-chip control module are connected with a button module.

A further technical solution is that the upper ports 7 to 11 of the above-mentioned single-chip microcomputer control module are respectively the voltage level adjustment key for adjusting the measured voltage level on the button module, the minimum voltage display adjustment key for the minimum voltage required for live display, adjustment and The actual voltage setting key, the increase key and the decrease key are connected with the same actual measured voltage value.

Compared with the prior art, the beneficial effect of the present invention is that it can accurately judge whether the high-voltage and ultra-high-voltage power systems are electrified, and can safely lock the corresponding equipment, and can digitally display the voltage value of the grid and indicate whether it is electrified, and the debugging is very convenient. Simple, intuitive and accurate, it has the function of adjusting the internal environment temperature, and is connected with the main control computer to realize the function of remote information transmission. It ensures the safety of power system equipment and personal safety, and ensures the safe operation of the power system.

Description of drawings

Fig. 1 is a connection schematic diagram of an embodiment of a live display and detection device for a high-voltage power system according to the present invention.

Fig. 2 is a circuit connection diagram of a sensing module of an embodiment of a live display detection device for a high-voltage power system according to the present invention.

Fig. 3 is a circuit connection of a signal conversion module of an embodiment of a live display detection device for a high-voltage power system according to the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Figure 1 shows an embodiment of a high-voltage power system live display detection device of the present invention: a high-voltage power system live display detection device, including sequentially connected sensing module C, lightning protection module B, filter module L, overvoltage Absorption module G, signal conversion module X and single-chip control module D, wherein said signal conversion module X is connected on the A/D port 1 of the single-chip control module D, and port 1 and port 2 on the single-chip control module D are connected There is a digital display alarm module S, the A/D port 2 on the single-chip control module D is connected with an ambient temperature detection module H, the D/A port on the single-chip control module D is connected with an electric meter indicating module N, and the single-chip control Port 3 on the module D is connected with a relay output module J, port 4 and port 5 on the single-chip microcomputer control module D are connected with a communication module T, and the communication module T is connected with the main control computer module A. On the single-chip microcomputer control module D The port 6 of the said single-chip microcomputer control module D is connected with the ultra-low temperature control module Y, and the ports 7-11 of the single-chip microcomputer control module D are connected with the button module Z.

According to a preferred embodiment of a live display detection device for a high-voltage power system of the present invention, ports 7 to 11 on the single-chip control module D are respectively connected to the voltage level adjustment key Z0 and the requirements on the key module Z for adjusting the measured voltage level. The lowest voltage display adjustment key Z1 of the charged display, the actual voltage setting key Z2 for adjusting to be consistent with the actual measured voltage value, the increase key Z3 and the decrease key Z4 are connected.

According to a preferred embodiment of the live display detection device for a high-voltage power system of the present invention: the sensing module C for sensing the high-voltage alternating electric field signal can be selected from the high-precision temperature sensor LM35 of the American Semiconductor Company. The reference source is used as a temperature-sensitive element, and the linearization technology such as differential pair tubes is used inside the chip to realize the linearization of the temperature-sensitive sensor and improve the accuracy of the sensor. Compared with traditional sensors such as thermistors and thermocouples, it has linear Good, high precision, small size, convenient calibration, low price and other characteristics, it is very suitable for temperature measurement. The specific wiring diagram is shown in Figure 2. Its main performance indicators are as follows:

1) The output voltage is proportional to the Celsius temperature: 10.0mV/℃;

2) Wide temperature measurement range: -55～150℃;

3) Wide power supply voltage: 4 ~ 30V;

4) Low power consumption, generally less than 60uA, self-heating temperature less than 0.1°C;

5) Non-linear value: less than ±1/4°C;

The resistance value of the resistance scale is selected according to R=Vcc/50uA. The linear relationship between the output voltage of the circuit and the temperature is:

1) Ambient temperature 150°C, Vout=1500mV;

2) Ambient temperature 25°C, Vout=250mV;

3) Ambient temperature -55°C, Vout=550mV.

According to another preferred embodiment of a live display detection device for a high-voltage power system of the present invention, the circuit connection of the signal conversion module X is shown in Figure 3: after the input voltage Vin is judged by the operational amplifier Ro, Q1 and Q2 are selected to be turned on , when Vin>0, Q1 is turned on, and Vout outputs a positive voltage value; when Vin<0, Q2 is turned on, and Vout also outputs a positive voltage value after passing through the inverter, and the output signal of the operational amplifier Ro can be used as an input Positive or negative judgment of the voltage Vin.

Its connection relationship is that the output terminal of the sensor module C that senses the high-voltage alternating electric field signal at a certain distance from the high potential part to be measured passes through the lightning protection module B that eliminates lightning waves and the filter module L that eliminates noise signals, and then connects through the voltage absorption module G. To the input terminal of the signal conversion module X, the signal conversion module X converts the sampled current signal into a voltage signal acceptable to the single-chip control module D, and the voltage signal at the output terminal of the signal conversion module X is sent to the A/D port 1 of the single-chip control module D , the single-chip control module D processes the signal, the port 1-port 2 of the single-chip control module D is connected to the digital display alarm module S, the D/A port of the single-chip control module D is connected to the electric meter indicator module N, and the port of the single-chip control module D -3 is connected to the relay output module J, the port 4-port 5 of the single-chip control module D is connected to the input terminal of the communication module T, the output terminal of the communication module T is connected to the main control computer module A, and the port 6 of the single-chip control module D Connected to the ultra-low temperature control module Y, the A/D port 2 of the single-chip control module D is connected to the ambient temperature detection module H, and the ports 7-11 of the single-chip control module D are respectively connected to the buttons on the button module Z to adjust the voltage level to be measured. Voltage level adjustment key Z0, the minimum voltage display adjustment key Z1 that requires the lowest voltage to be displayed live, the actual voltage adjustment key Z2 that is consistent with the actual measured voltage value, the increase key Z3 and the decrease key Z4.

In the present invention, the single-chip microcomputer control module D is the best choice of mcs-51 single-chip microcomputer.

Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it is to be understood that numerous other modifications and implementations can be devised by those skilled in the art which will fall within the scope of the disclosure disclosed in this application. within the scope and spirit of the principles. More specifically, within the scope of the disclosure, drawings and claims of the present application, various modifications and improvements can be made to the components and/or layout of the subject combination layout. In addition to modifications and improvements in component parts and/or layout, other uses will be apparent to those skilled in the art.

Claims (3)

1. charged demonstration pick-up unit of high-voltage electric power system, it is characterized in that: comprise the sensing module (C) that connects successively, thunder-arresting module (B), filtration module (L), superpotential absorption module (G), signal conversion module (X) and single chip control module (D), wherein said signal conversion module (X) is to be connected on the A/D mouth 1 of single chip control module (D), mouth 1 and mouth 2 on the described single chip control module (D) are connected with digital display alarm module (S), A/D mouth 2 on the described single chip control module (D) is connected with environment temperature detection module (H), the upper D/A mouth of described single chip control module (D) is connected with ammeter indicating module (N), mouth 3 on the described single chip control module (D) is connected with relay output module (J), mouth 4 and mouth 5 on the described single chip control module (D) are connected with communication module (T), communication module (T) links to each other with main control computer module (A), mouth 6 on the described single chip control module (D) is connected with ultralow temperature control module (Y), and described single chip control module (D) 7～mouth 11 suitable for reading is connected with key-press module (Z).

2. the charged demonstration pick-up unit of a kind of high-voltage electric power system according to claim 1 is characterized in that: described single chip control module (D) is suitable for reading 7～mouthfuls 11 be respectively adjust key (Z0) with the upper electric pressure that is used for adjusting tested electric pressure of key-press module (Z), require the minimum voltage of the minimum voltage of charged demonstration to show to adjust key (Z1), the adjustment virtual voltage consistent with actual tested magnitude of voltage adjusted key (Z2), increase key (Z3) and minimizing key (Z4) links to each other.

3. the charged demonstration pick-up unit of a kind of high-voltage electric power system according to claim 1 and 2, it is characterized in that: described single chip control module (D) is mcs-51 type single-chip microcomputer.

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