CN204479706U - Digitizing wideband partial discharge test system - Google Patents

Abstract

The utility model provides a digital broadband partial discharge testing system with simpler structure, smaller volume and weight, more convenient movement and maintenance, and more convenient setting and debugging operations. It includes full digital non-partial discharge high voltage power supply, protection impedance, calibration pulse generator, measurement impedance, control circuit with data acquisition card, partial discharge instrument and human-computer interaction module; full digital no partial discharge high voltage power supply and protection impedance circuit connection, the first terminal is connected to the protective impedance; the pulse input and output terminals of the calibration pulse generator are respectively connected to the two ends of the measurement impedance; the second terminal is also connected to the measurement impedance; the measurement impedance is electrically connected to the partial discharge instrument at the same time, The partial discharge instrument is electrically connected to the control circuit equipped with the data acquisition card and the second terminal; the control circuit equipped with the data acquisition card is also electrically connected to the all-digital high voltage power supply without partial discharge, the calibration pulse generator and the human-computer interaction module; The human-computer interaction module is a module with a windowed operating system.

Description

Digital Broadband Partial Discharge Test System

technical field

The utility model relates to the technical field of partial discharge detection of electrical equipment; specifically, it refers to a digital broadband partial discharge test system for detecting the quality and performance of electrical insulation.

Background technique

As we all know, the insulating components of electrical equipment are affected by various factors such as electricity, heat, machinery, and adverse environments during operation, and the insulation performance will gradually deteriorate, resulting in defects in the insulation of the equipment and causing equipment failure. Insulation detection and diagnosis technology can detect faults in the early stage of electrical equipment insulation components; especially partial discharge testing technology is widely used as a non-destructive testing technology. An accurate and convenient partial discharge test system is very important to ensure the quality of high-voltage electrical appliances and the safe operation of the power system; the products of the partial discharge test system in the prior art are complicated and diverse, but their main structure is the same as that shown in Figure 1 Similarly, the partial discharge test system in the prior art shown in accompanying drawing 1 mainly includes no partial discharge power supply 01, step-up transformer 02, protection impedance 03, coupling capacitor 04, measurement impedance 05, partial discharge instrument 06 and embedded data processing With the control center 07; the described non-PD power source 01, step-up transformer 02, protection impedance 03, coupling capacitor 04, measurement impedance 05 and PD instrument 06 are electrically connected in sequence; the embedded data processing and control center 07 They are respectively electrically connected to the non-PD power source 01, the step-up transformer 02 and the PD instrument 06.

The inventors of this patent application have found through practice that the partial discharge test system using the above-mentioned structure in the prior art has the following disadvantages: 1. The power supply part includes a step-up transformer 02 that is quite large in volume and weight, so that The volume and weight of the system are huge, and the movement and maintenance operations of the equipment are complicated. 2. The embedded data processing and control center 07 product has a low degree of integration and simple functions, and the relevant setting and debugging operations for users during use are complicated.

To sum up, there is an urgent need for a new partial discharge test system with simpler structure, smaller volume and weight, more convenient movement and maintenance, and more convenient setup and debugging operations.

Utility model content

The technical problem to be solved by the utility model is to provide a digital broadband partial discharge testing system with simpler structure, smaller volume and weight, more convenient movement and maintenance, and more convenient setting and debugging operations.

In order to solve the above-mentioned technical problems, the technical solution provided by the utility model is: a digital broadband partial discharge test system, which includes a full digital non-partial discharge high-voltage power supply, a protection impedance, a calibration pulse generator, a measurement impedance, and a data acquisition card The control circuit, the partial discharge instrument and the human-computer interaction module; the full digital non-partial discharge high-voltage power supply is electrically connected to the protection impedance, and the protection impedance is connected to the first terminal for connecting the device under test; the The pulse input and output terminals of the calibration pulse generator are respectively connected to the two ends of the measurement impedance; the measurement impedance is also connected to the second terminal for connecting the device under test; the measurement impedance is electrically connected to the partial discharge instrument at the same time, and the The partial discharge instrument is electrically connected with the control circuit of the data acquisition card; the partial discharge instrument is electrically connected with the second terminal at the same time; The power supply, the calibration pulse generator and the human-computer interaction module are electrically connected; the human-computer interaction module is a module with a windowed operating system.

After adopting the above structure, the utility model has the following beneficial effects: 1. The digital broadband partial discharge test system adopts a full digital non-partial discharge high-voltage power supply to replace the combination of the non-partial discharge power source and the step-up transformer in the prior art, The all-digital non-partial discharge high-voltage power supply is small in size and light in weight, making the movement and maintenance of the whole system more convenient. 2. The human-computer interaction module of the digital broadband partial discharge test system uses a module with a windowed operating system to replace the embedded operating system module in the prior art. The module has more functions, and it is easy for users to set up and debug. more convenient. In addition, the system is optimized for the whole system while creatively adopting the all-digital non-discharge high-voltage power supply and the module with windowed operating system. The introduction of calibration pulse generator and other components makes the performance of the system more excellent.

Preferably, the all-digital high-voltage power supply without partial discharge has a wide frequency test range of 0-400HZ. The wide frequency range in this preference makes the test system have a very wide test range, and the system has better versatility.

As an improvement, the all-digital non-partial discharge high-voltage power supply, the protection impedance and the calibration pulse generator are integrated to form a power module with an integrated structure. This improvement makes the power supply of the whole system modular, further optimizing the overall structure of the system.

As a further improvement, the control circuit equipped with the data acquisition card and the partial discharge instrument are integrated to form a pre-processor and a control module of an integrated structure. This improvement further optimizes the overall structure of the system.

As a further preference, the human-computer interaction module is a computer with a Windows operating system. The Windows operating system is quite mature, and the users are relatively skilled, so they can perform test recording and data transmission flexibly and efficiently.

In summary, the utility model provides a digital broadband partial discharge testing system with simpler structure, smaller volume and weight, more convenient movement and maintenance, and more convenient setting and debugging operations.

Description of drawings

Fig. 1 is a schematic structural block diagram of a partial discharge testing system in the prior art.

Fig. 2 is a structural schematic diagram of the digital broadband partial discharge testing system of the present invention.

As shown in the figure: in the prior art: 01, no partial discharge power supply, 02, step-up transformer, 03, protection impedance, 04, coupling capacitor, 05, measurement impedance, 06, partial discharge instrument, 07, embedded data processing with Control Center.

In the utility model: 1. All-digital high-voltage power supply without partial discharge, 2. Protection impedance, 3. Calibration pulse generator, 4. Measurement impedance, 5. Control circuit equipped with data acquisition card, 6. Partial discharge instrument, 7. . Human-computer interaction module, 8. First terminal, 9. Second terminal, 10. Power supply module, 11. Front-end device and control module.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

In conjunction with accompanying drawing 2, a kind of digital broadband partial discharge test system, it includes all-digital non-partial discharge high voltage power supply 1, protection impedance 2, calibration pulse generator 3, measurement impedance 4, the control circuit 5 that is equipped with data acquisition card, local A discharge instrument 6 and a human-computer interaction module 7; the full digital non-partial discharge high voltage power supply 1 is electrically connected to the protection impedance 2, and the protection impedance 2 is connected to a first terminal 8 for connecting the device under test; The pulse input and output terminals of the calibration pulse generator 3 are respectively connected to the two ends of the measurement impedance 4; the measurement impedance 4 is also connected to the second terminal 9 for connecting the device under test; the measurement impedance 4 is simultaneously connected with the partial discharge Instrument 6 is electrically connected, and described partial discharge instrument 6 is electrically connected with the control circuit 5 that data acquisition card is housed; Described partial discharge instrument 6 is electrically connected with second terminal 9 simultaneously; The control circuit 5 is also electrically connected to the all-digital non-PD high voltage power supply 1, the calibration pulse generator 3 and the human-computer interaction module 7; the human-computer interaction module 7 is a module with a windowed operating system. The all-digital non-partial discharge high voltage power supply 1 has a wide frequency test range of 0-400HZ. The all-digital non-PD high voltage power supply 1 , the protection impedance 2 and the calibration pulse generator 3 are integrated together to form a power module 10 with an integrated structure. The control circuit 5 equipped with the data acquisition card and the partial discharge instrument 6 are integrated together to form an integrated front-end device and control module 11 . The human-computer interaction module 7 is a computer with Windows operating system.

When the utility model is actually implemented, the user can directly purchase and use the full digital non-PD high-voltage power supply 1 and the human-computer interaction module 7; the control circuit 5 equipped with a data acquisition card is used to collect the PD instrument 6 data and related control over the all-digital non-PD high-voltage power supply 1 and the calibration pulse generator 3, the technicians in the industry can implement it according to the full-digital non-PD high-voltage power supply 1, the calibration pulse generator 3 and the PD instrument 6 The specific circuit structure of the circuit and the simple connection and setting of the circuit in combination with the manuals of the components belong to the necessary common sense for technicians in the industry, and will not be repeated here. When the digital broadband partial discharge testing system is specifically used, further referring to FIG. 2 , the device under test is connected between the first terminal 8 and the second terminal 9 . It should be noted that the digital broadband partial discharge test system involved in the utility model is not only suitable for digital broadband, but also suitable for power frequency.

The specific working process of the digital broadband partial discharge testing system involved in the utility model is as follows: the equipment to be tested is connected between the first terminal 8 and the second terminal 9; the defective part of the insulation part of the equipment to be tested is equivalent to a capacitor. The user sets parameters such as the initial working voltage, frequency, and each increased voltage value of the all-digital non-PD high voltage power supply 1 by operating the computer in the human-computer interaction module 7, and clicks to start the automatic test. Subsequently, the all-digital non-partial discharge high-voltage power supply 1 will apply the test voltage with the set frequency and initial working voltage to the circuit where the equipment under test and the measurement impedance 4 are located, and the equivalent capacitance of the equipment under test will start to charge, and will The control circuit 5 with the data acquisition card controls the calibration pulse generator 3 to generate voltage pulses, and starts to perform automatic indirect calibration on the circuit where the measurement impedance 4 is located to test the discharge capacity. The test voltage increases gradually according to the set voltage value each time, and when the partial discharge initiation voltage of the tested equipment is reached, the tested equipment starts to discharge. The partial discharge instrument 6 starts to detect the signal on the measurement impedance 4, obtains the discharge waveform, and transmits the data to the human-computer interaction module 7 through the data acquisition card of the control circuit 5 equipped with the data acquisition card, and the human-computer interaction module 7 presses Test requirements automatically generate standard test reports.

The utility model and its implementations have been described above, but the description is not restrictive. What is shown in the drawings is only one of the implementations of the utility model, and the actual structure is not limited thereto. All in all, if a person of ordinary skill in the art is inspired by it, without departing from the purpose of the utility model, without creatively designing a structural method and embodiment similar to the technical solution, it shall be protected by the utility model scope.

Claims (5)

1. A digital broadband partial discharge test system, which includes protective impedance (2), measurement impedance (4) and partial discharge instrument (6); it is characterized in that: it also includes full digital high voltage power supply without partial discharge (1), Calibrate the pulse generator (3), the control circuit (5) and the human-computer interaction module (7) equipped with the data acquisition card; The full digital non-partial discharge high voltage power supply (1) is electrically connected to the protection impedance (2), and the protection impedance (2) is connected with a first terminal (8) for connecting the equipment under test; the calibration The pulse input and output terminals of the pulse generator (3) are respectively connected to the two ends of the measurement impedance (4); the measurement impedance (4) is also connected to the second terminal (9) for connecting the device under test; the measurement Impedance (4) is electrically connected with partial discharge instrument (6) simultaneously, and described partial discharge instrument (6) is electrically connected with the control circuit (5) that data acquisition card is housed; Described partial discharge instrument (6) is connected with simultaneously The second terminal (9) is electrically connected; The described control circuit (5) that the data acquisition card is housed is also electrically connected with the all-digital no-partial-discharge high-voltage power supply (1), the calibration pulse generator (3) and the man-machine interaction module (7) respectively; The computer interaction module (7) is a module with a windowed operating system. 2. The digital broadband partial discharge testing system according to claim 1, characterized in that: said all-digital non-PD high voltage power supply (1) has a broadband testing range of 0-400HZ. 3. The digital broadband partial discharge test system according to claim 1, characterized in that: said all-digital partial discharge-free high-voltage power supply (1), protective impedance (2) and calibration pulse generator (3) are integrated Together, they constitute a power module (10) with an integrated structure. 4. The digital broadband partial discharge test system according to claim 1, characterized in that: the control circuit (5) and the partial discharge instrument (6) of the described data acquisition card are integrated together to form an integrated A front-end device and a control module (11) of the structure. 5. The digital broadband partial discharge testing system according to claim 1, characterized in that: the human-computer interaction module (7) is a computer with a Windows operating system.