CN204347198U - Insulator Leakage Current signal measures system - Google Patents

Abstract

The utility model discloses a kind of insulator Leakage Current signal and measure system, it comprises power module, insulator, moist chambers, detect resistance and harvester, this insulator is placed in this moist chambers, the output terminal of this power module is connected in series this insulator successively and detects resistance, this harvester also connects the magnitude of voltage that these detection resistance two ends also can obtain these resistance two ends, the various extraneous running environment humidity condition of the utility model analog insulation, the voltage at the detection resistance two ends obtained under different running environment humidity by this harvester reflects this insulator leakage of current situation, and then for reflecting that the insulating property of this insulator provide reliable basis.

Description

Insulator Leakage Current Signal Measurement System

technical field

The utility model relates to an insulator leakage current signal measuring system.

Background technique

The air on high mountains is thin, and there is heavy fog in the morning and evening. The insulation performance of insulators suspended on transmission lines on high mountains is lower than that of insulators suspended on transmission lines on flat ground. If the outer surface of the insulator suspended by the transmission line on the high mountain is seriously dusty, under the action of fog condensation, the fine water on the outer surface of the insulator will easily cause the insulation performance of the insulator to decline, and in severe cases, it will cause the insulation breakdown of the insulator, resulting in a short-circuit tripping accident of the transmission line. Therefore, it is of great engineering practical significance to develop an insulator leakage current signal measurement system, accurately analyze the insulation performance of insulators under different operating environment humidity, and provide a reliable basis for diagnosis and analysis of insulator insulation performance.

Utility model content

The utility model provides an insulator leakage current signal measuring system, which overcomes the shortcomings of the prior art described in the background art.

The technical scheme that the utility model solves its technical problem adopts is:

An insulator leakage current signal measurement system, which includes a power module, an insulator, a fog chamber, a detection resistor and an acquisition device. The device is connected in parallel with the two ends of the detection resistor and can obtain the voltage value at the two ends of the resistor.

In one embodiment: the power supply module includes a voltage regulator and a transformer, the input terminal of the voltage regulator is connected to the output of the low-voltage power supply, the output terminal of the voltage regulator is connected to the primary side of the transformer, and the secondary side of the transformer is used as the The output terminal of the power module.

In one embodiment: it also includes a capacitive voltage divider and a measuring device, the capacitive voltage divider can be connected to the output terminal of the power module in parallel, the measuring device is connected to the capacitive voltage divider and can obtain and display the capacitive voltage dividing The voltage divider value on the device.

In an embodiment: a protection resistor is further included, and the protection resistor is connected in series with the positive output end of the power module.

In one embodiment: a wall-through sleeve is provided, the wall-through sleeve is fixed on the wall of the mist chamber, and the serial wires located outside the mist chamber pass through the wall-through sleeve and connect to the mist chamber. insulators.

In one embodiment: the measuring device is a voltmeter.

In one embodiment: the wall-piercing sleeve is a ceramic sleeve and hollow column.

Compared with the background technology, this technical solution has the following advantages:

The insulator leakage current signal measurement system includes a power module, an insulator, a fog chamber, a detection resistor and an acquisition device. Connect the two ends of the detection resistor and can obtain the voltage value at both ends of the resistance. The utility model simulates various external operating environment humidity conditions of the insulator, and obtains the voltage at both ends of the detection resistor under different operating environment humidity through the acquisition device to reflect the insulator Current leakage, and then provide a reliable basis for reflecting the insulation performance of the insulator.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 shows the circuit system diagram of the insulator leakage current signal measuring system described in the present invention.

Detailed ways

Please refer to FIG. 1 , an insulator leakage current signal measurement system, which includes a power module 10 , an insulator 20 , a mist chamber 30 , a detection resistor 40 , an acquisition device 50 , a capacitive voltage divider 60 , a measurement device 70 and a protection resistor 80 .

The power module 10 includes a voltage regulator 11 and a transformer 12. The input terminal of the voltage regulator 11 is connected to the output of a low-voltage power supply (380V AC power supply), and the output terminal of the voltage regulator 11 is connected to the primary side of the transformer 12. The transformer 12 The secondary side of the power supply module 10 is used as the output terminal.

The insulator 20 is placed in the mist chamber, the output terminal of the power module 10 is connected in series with the insulator 20 and the detection resistor 40 in sequence, and the acquisition device 50 is connected in parallel to both ends of the detection resistor 40 and can obtain the voltage value at both ends of the resistor 40 , the voltage value is equal to the product of the leakage current of the insulator 20 and the resistance value of the detection resistor 40 , and the acquisition device 50 analyzes the leakage current component of the insulator 20 by analyzing the voltage component at both ends of the detection resistor 40 . The capacitive voltage divider 60 can be parallel connected to the output terminal of the power module 10 , and the measuring device 70 is connected to the middle tap of the capacitive voltage divider 60 and can obtain and display the divided voltage value on the capacitive voltage divider 60 . In this embodiment, the measuring device 70 is a voltmeter, and the output voltage of the power supply module 10 is monitored in real time through the display value of the voltmeter. The voltage at the output terminal of the high-voltage side of the transformer 12 can be obtained, and the voltage regulator 11 can be adjusted according to the value displayed by the voltmeter, thereby changing the output voltage of the power module 10 .

The protective resistor 80 is connected in series with the positive output terminal of the power module 10. When the voltage applied across the protective resistor 80 is greater than its rated withstand voltage, the protective resistor 80 will be fused, and the insulator 20 will be connected to the high voltage side of the output terminal of the transformer 12. isolated; when the voltage applied across the protective resistor 80 is less than its rated withstand voltage, the protective resistor 80 is short-circuited.

Preferably, a wall-through sleeve 90 is provided, and the wall-through sleeve 90 is fixed on the wall of the mist chamber 30, and the serial wires outside the mist chamber 30 pass through the wall-through sleeve 90 and are connected to the mist chamber. The insulator 20 in the chamber 30 is used to protect the wall-piercing section of the series wire from damage. In this embodiment, the wall-piercing bushing 90 is a ceramic bushing with a hollow column shape.

The degree of mist in the mist chamber 30 of the present invention can be adjusted to simulate the humidity of the operating environment outside the insulator 20 .

The above is only a preferred embodiment of the utility model, so the scope of implementation of the utility model cannot be limited accordingly, that is, equivalent changes and modifications made according to the patent scope of the utility model and the contents of the specification should still belong to this utility model. within the scope of utility models.

Claims (7)

1. The insulator leakage current signal measurement system is characterized in that it includes a power module, an insulator, a mist chamber, a detection resistor and an acquisition device, the insulator is placed in the mist chamber, and the output terminal of the power module is connected in series with the insulator and A detection resistor, the acquisition device is connected to the two ends of the detection resistor in parallel and can obtain the voltage value at the two ends of the resistance. 2. The insulator leakage current signal acquisition system according to claim 1, characterized in that: the power supply module includes a voltage regulator and a transformer, the input terminal of the voltage regulator is connected to the output of a low-voltage power supply, and the output of the voltage regulator The primary side of the transformer is terminated, and the secondary side of the transformer is used as the output terminal of the power module. 3. The insulator leakage current signal acquisition system according to claim 1 or 2, characterized in that: it also includes a capacitive voltage divider and a measuring device, the capacitive voltage divider can be connected to the output terminal of the power module in parallel, A measuring device is connected to the capacitive voltage divider and is able to obtain and display the divided voltage value on the capacitive voltage divider. 4. The insulator leakage current signal measuring system according to claim 1 or 2, further comprising a protection resistor connected in series with the positive output terminal of the power module. 5. The insulator leakage current signal measuring system according to claim 1 or 2, characterized in that: a wall bushing is provided, and the wall bushing is fixed on the wall of the mist chamber. The series wire is passed through the wall bushing and connected to the insulator in the mist chamber. 6. The insulator leakage current signal measuring system according to claim 3, characterized in that the measuring device is a voltmeter. 7. The insulator leakage current signal measuring system according to claim 5, characterized in that: the wall-piercing bushing is a ceramic bushing and hollow columnar.