CN205749862U - The special interference source of calibration system is put in a kind of superfrequency office - Google Patents

Abstract

The utility model discloses a kind of superfrequency office and put the special interference source of calibration system, including interference source analog controlling unit, high-voltage amplifier and high-voltage discharging electrode, the described low-voltage output of interference source analog controlling unit is connected with the input of high-voltage amplifier, the outfan of high-voltage amplifier is connected with the input of high-voltage discharging electrode, described interference source analog controlling unit includes signal source and signal controller, and the outfan of signal source is connected with the input of signal controller.Superfrequency office can be put calibration system and carry out anti-interference test by this utility model, improves superfrequency office and puts the anti-interference level of calibration system.

Description

A special interference source for UHF partial discharge calibration system

technical field

The utility model relates to the technical field of UHF partial discharge detection, in particular to a special interference source for a UHF partial discharge calibration system.

Background technique

In recent years, high-voltage electrical equipment such as GIS, cables and power transformers have been widely used in power systems, and partial discharge is the main factor affecting the stable operation of high-voltage electrical equipment. It has good flexibility and strong anti-interference ability, so it is widely used in the partial discharge detection of high-voltage electrical equipment. UHF partial discharge detection technology is an important means to ensure the stable operation of high-voltage electrical equipment.

At present, the UHF PD detection technology is realized through the UHF PD calibration system. Before the UHF PD calibration system is used, it needs to be tested to detect the coupling and receiving characteristics of the UHF sensor and the detection sensitivity of the system. and dynamic range etc. At present, the testing of the UHF PD calibration system is carried out in a laboratory without external electromagnetic field interference. However, when the UHF PD calibration system is tested on site, due to the complex environment and many The detection accuracy of the high-frequency partial discharge calibration system will be affected.

Utility model content

The purpose of the utility model is to provide a special interference source for the UHF PD calibration system, which can conduct anti-interference tests on the UHF PD calibration system and improve the anti-interference level of the UHF PD calibration system.

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

A special interference source for a UHF partial discharge calibration system, including an interference source analog control unit, a high-voltage amplifier and a high-voltage discharge electrode, the low-voltage output end of the interference source analog control unit is connected to the input end of a high-voltage amplifier, and the output of the high-voltage amplifier terminal is connected with the input terminal of the high-voltage discharge electrode, and the interference source simulation control unit includes a signal source and a signal controller, and the output terminal of the signal source is connected with the input terminal of the signal controller.

The signal controller includes a controller and a display screen, and the display screen is provided with a setting key, a start key and a stop key.

A timer is also included, and the timer is electrically connected to the signal controller.

The high-voltage amplifier adopts a 0-10kV high-voltage amplifier.

There are multiple high-voltage discharge electrodes, which are suspension discharge electrodes, corona discharge electrodes, hole discharge electrodes and free particle discharge electrodes.

The utility model has the following beneficial effects:

(1) The utility model interferes with the UHF PD calibration system by setting the interference source simulation control unit, the test results are accurate, and the anti-interference ability of the UHF PD calibration system is improved;

(2) The utility model controls the interference signal by setting a signal controller in the interference source analog control unit, which can adjust the amplitude, frequency and duration of the interference signal to meet the requirements of different UHF partial discharge calibration systems ;

(3) The utility model adopts a plurality of high-voltage discharge electrodes, which can produce different discharge types. Selecting different discharge electrodes can produce suspension discharge, corona discharge, hole discharge and particle discharge;

(4) The utility model has the advantages of simple structure, low cost, convenient operation and strong practicability, and can be applied to different discharge occasions.

Description of drawings

Fig. 1 is a functional block diagram of the utility model.

detailed description

As shown in Figure 1, the utility model comprises interference source analog control unit, high-voltage amplifier and high-voltage discharge electrode, the low-voltage output end of interference source analog control unit is connected with the input end of high-voltage amplifier, the output end of high-voltage amplifier is connected with the high-voltage discharge electrode. The input terminals are connected to each other, the interference source analog control unit is used to generate low-voltage control signals, and is used to set the parameters of the low-voltage control signals, such as amplitude, frequency and duration, etc., and the high-voltage amplifier is used to control the low-voltage generated by the interference source analog control unit The control signal is amplified, and the high-voltage discharge electrode is used for high-voltage discharge to interfere with the UHF partial discharge calibration system.

The interference source analog control unit includes a signal source and a signal controller. The output end of the signal source is connected to the input end of the signal controller. The signal controller includes a controller and a display screen. The display screen is provided with a setting key, a start key and a stop key. , the signal source is used to generate the low-voltage control signal, and the signal controller is used to set the parameters of the low-voltage control signal, including amplitude, frequency and duration. The signal controller is also provided with a timer, and the timer is electrically connected to the signal controller.

The high-voltage amplifier adopts a 0-10kV high-voltage amplifier, which is used to amplify the low-voltage control signal output by the analog control unit of the interference source, so as to reach the discharge voltage of the high-voltage discharge electrode.

There are multiple high-voltage discharge electrodes. In this embodiment, n high-voltage discharge electrodes are used, n=1, 2, ... n, which are respectively suspension discharge electrodes, corona discharge electrodes, hole discharge electrodes and free particle discharge electrodes. During the experiment, different discharge electrodes are selected according to different interference source simulation types.

When the utility model is working, first set the amplitude, frequency and duration of the interference signal on the interference source analog control unit, press the start button after the setting is completed, the timer starts counting, and after 10 seconds, the timer outputs the control signal , control the interference source analog control unit to start, the low voltage control signal output by the interference source analog control unit rises slowly, after 30 seconds, the low voltage control signal output by the interference source analog control unit reaches the set value, during this process, the high voltage generator Amplify the low-voltage control signal output by the analog control unit of the interference source, and the output signal of the high-voltage generator changes with the change of the control signal. When the signal output by the high-voltage amplifier reaches the discharge voltage of the high-voltage electrode, the high-voltage electrode starts to discharge, and the high-voltage electrode After the discharge time is up, press the stop button, disconnect the power supply, and complete the experiment.

The utility model can test the UHF partial discharge calibration system in an environment with strong electromagnetic interference, the test result is accurate, and the anti-interference level of the UHF partial discharge calibration system is improved.

Claims (5)

1. the special interference source of calibration system is put in a superfrequency office, it is characterised in that: include interference source analog controlling unit, high pressure Amplifier and high-voltage discharging electrode, the low-voltage output of described interference source analog controlling unit and the input phase of high-voltage amplifier Even, the outfan of high-voltage amplifier is connected with the input of high-voltage discharging electrode, and described interference source analog controlling unit includes letter Number source and signal controller, the outfan of signal source is connected with the input of signal controller.

2. the special interference source of calibration system is put in a kind of superfrequency office as claimed in claim 1, it is characterised in that: described signal control Device processed includes controller and display screen, display screen is provided with and arranges key, start key and stop key.

3. the special interference source of calibration system is put in a kind of superfrequency office as claimed in claim 2, it is characterised in that: also include timing Device, described timer electrically connects with signal controller.

4. the special interference source of calibration system is put in a kind of superfrequency office as claimed in claim 1, it is characterised in that: described height presses Big device uses 0-10kV high-voltage amplifier.

5. the special interference source of calibration system is put in a kind of superfrequency office as claimed in claim 1, it is characterised in that: described height presses Electricity electrode has multiple, respectively suspended discharge electrode, corona discharge electrode, cavity discharge electrode and free granule sparking electrode.