CN111830311A - An external non-contact VFTO signal measuring device - Google Patents

Abstract

The application belongs to the technical field of GIS equipment detection, and in particular relates to an external non-contact VFTO signal measurement device. The current GIS equipment VFTO signal detection has the problems of complex structure and high cost. The external non-contact VFTO signal measurement device of the present application includes: a non-contact voltage acquisition module, a non-contact current acquisition module, a data processing module, a storage module, a power management module and a communication module, wherein the non-contact voltage acquisition module , The non-contact current acquisition module is connected with the data processing module, the storage module and the communication module are respectively connected with the data processing module, and the data processing module, the storage module and the communication module are all connected with the power management module. Due to the non-contact structure, the VFTO signal detection can be realized outside the GIS equipment without the need of pre-installed capacitance probes or pre-embedded electrodes; the present application has simple structure and moderate cost, and is suitable for popularization and application.

Description

An external non-contact VFTO signal measuring device

technical field

The present application relates to the technical field of GIS equipment detection, and in particular, to an external non-contact VFTO signal measurement device.

Background technique

VFTO (Very Fast Transient Overvoltage), that is, very fast transient overvoltage, has the characteristics of short wave front time, large amplitude and high frequency, especially the VFTO caused by the operation of the isolation switch in the GIS substation, which can be transmitted through the transmission of the electronic transformer. The sensor unit enters the secondary circuit, causing serious interference and damage to the localized protection equipment, and effective measures need to be taken to measure.

At present, the domestic VFTO measurement methods are mainly capacitive voltage divider measurement system and differential integration measurement system. The capacitive voltage divider measurement system needs a built-in capacitance probe. After the VFTO signal is depressurized by the capacitive voltage divider, it is sent to the matched measurement cable. Into the oscilloscope display and measurement; the differential and integral measurement system needs to form a differential capacitor in the high-voltage bus in the GIS and the embedded electrode in the basin insulator, and connect with the differential resistance, the integration link and the oscilloscope through the measurement cable. These two measurement methods cannot be used for the GIS equipment that has been put into operation, neither can measure the current waveform when VFTO occurs, and there are problems such as complex structure, high cost, and poor use effect.

SUMMARY OF THE INVENTION

The present application provides an external non-contact VFTO signal measuring device to solve the problems of complex structure, high cost and poor use effect in the VFTO signal detection of the existing GIS equipment.

The technical scheme adopted in this application is as follows:

An external non-contact VFTO signal measurement device, characterized in that it includes: a non-contact voltage acquisition module, a non-contact current acquisition module, a data processing module, a storage module, a power management module and a communication module, wherein the non-contact type The voltage acquisition module and the non-contact current acquisition module are all connected with the data processing module, the storage module and the communication module are respectively connected with the data processing module, and the data processing module, the storage module and the communication module are all connected with the power management module.

Optionally, the non-contact voltage acquisition module includes a photoelectric sensor, a laser unit and an electric field intensity conversion unit, the photoelectric sensor is respectively connected with the laser unit and the electric field intensity conversion unit through an optical fiber, and the photoelectric sensor and the electric field intensity conversion unit are respectively connected. The laser unit is used to obtain the electric field intensity, and the electric field intensity conversion unit is used to convert the electric field intensity into a voltage signal.

Optionally, the non-contact current acquisition module includes a magnetic field detection probe, a radar ranging unit and a magnetic field intensity conversion unit, and the magnetic field detection probe and the radar ranging unit are respectively connected with the magnetic field intensity conversion unit through an optical fiber. The magnetic field detection probe is used to detect the magnetic field, the radar ranging unit is used to measure the distance between the magnetic field detection probe and the high-voltage busbar inside the GIS, and the magnetic field intensity conversion unit converts the magnetic field intensity into a corresponding current signal.

Optionally, the data processing module includes an ARM processor and an STM32 microcontroller.

Optionally, the memory module includes a flash chip and a DDR4 memory chip.

Optionally, the power management module includes a battery and a charge and discharge management unit, the battery is connected to the charge and discharge management unit, and the charge and discharge management unit is used to control the charge and discharge of the battery.

Optionally, the communication module adopts 4G and carrier dual channels.

Optionally, the capacity of the DDR4 memory chip is greater than or equal to 256MB.

Optionally, the battery adopts a removable 7.4V·2200mAh intelligent wide-temperature lithium battery.

The beneficial effects of adopting the technical solution of the present application are as follows:

Due to the use of external non-contact voltage acquisition modules and current acquisition modules in this application, the complete set of detection devices does not require capacitive probes or pre-embedded electrodes in the GIS, and deeply integrates the sensing device end, so that the VFTO signal can be realized outside the GIS. Online real-time detection; the use of removable lithium batteries to ensure long-term power supply, can continuously observe and capture VFTO signal waveforms, and achieve long-term online real-time detection of VFTO signals outside the GIS. The device of the invention is simple in structure, moderate in cost, easy to implement, and has excellent use effect, and is suitable for popularization and use.

Description of drawings

In order to illustrate the technical solutions of the present application more clearly, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, without creative work, the Additional drawings can be obtained from these drawings.

FIG. 1 is a schematic structural diagram of an embodiment of the present application.

Illustration description:

Among them, 1- non-contact voltage acquisition module, 2- non-contact current acquisition module, 3- data processing module, 4- storage module, 5- power management module, 6- communication module, 7- photoelectric sensor, 8- magnetic field Detection probe, 9-radar ranging unit.

Detailed ways

Embodiments will be described in detail below, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following examples are not intended to represent all implementations consistent with this application. are merely exemplary of systems and methods consistent with some aspects of the present application as recited in the claims.

Referring to FIG. 1 , it is a schematic structural diagram of an embodiment of the present application.

An external non-contact VFTO signal measurement device provided by the present application is characterized by comprising: a non-contact voltage acquisition module, a non-contact current acquisition module, a data processing module, a storage module, a power management module and a communication module, wherein The non-contact voltage acquisition module and the non-contact current acquisition module are connected with the data processing module, the storage module and the communication module are respectively connected with the data processing module, and the data processing module, storage module and communication module are connected with the power management module. connect.

The photoelectric sensor and the laser unit described in this embodiment are used to obtain the electric field intensity, and the electric field intensity conversion unit converts the obtained electric field intensity into a signal corresponding to a voltage. The device described in this embodiment can realize the online real-time detection of the VFTO signal outside the GIS without arranging capacitance probes or pre-embedded electrodes in the GIS, and deeply integrating the sensing device end.

The magnetic field detection probe in this embodiment is used to detect the magnetic field at the location, the radar ranging unit is used to measure the distance between the magnetic field detection probe and the high-voltage bus inside the GIS, and the magnetic field intensity conversion unit converts the obtained magnetic field intensity into a corresponding current signal. The device described in this embodiment can realize the online real-time detection of the VFTO signal outside the GIS without arranging capacitance probes or pre-embedded electrodes in the GIS, and deeply integrating the sensing device end.

Optionally, the non-contact voltage acquisition module includes a photoelectric sensor, a laser unit and an electric field intensity conversion unit, the photoelectric sensor is respectively connected with the laser unit and the electric field intensity conversion unit through an optical fiber, and the photoelectric sensor and the electric field intensity conversion unit are respectively connected. The laser unit is used to obtain the electric field intensity, and the electric field intensity conversion unit adopts a resonant cavity double-cone enhanced structure or a double-ring structure (the peripheral annular structure eliminates the edge effect, enhances the amplitude-frequency response bandwidth, increases the frequency bandwidth, and reduces the axial size), which is significant. Increase the sensing area, the dielectric strength of the film reaches 6.5, and the electric field strength conversion unit is used to convert the electric field strength into a voltage signal.

Optionally, the non-contact current acquisition module includes a magnetic field detection probe, a radar ranging unit and a magnetic field intensity conversion unit, and the magnetic field detection probe and the radar ranging unit are respectively connected with the magnetic field intensity conversion unit through an optical fiber. The magnetic field detection probe is used to detect the magnetic field, the radar ranging unit is used to measure the distance between the magnetic field detection probe and the high-voltage busbar inside the GIS, and the magnetic field intensity conversion unit converts the magnetic field intensity into a corresponding current signal.

Optionally, the data processing module includes an ARM processor and an STM32 microcontroller.

Optionally, the memory module includes a flash chip and a DDR4 memory chip.

Optionally, the power management module includes a battery and a charge and discharge management unit, the battery is connected to the charge and discharge management unit, and the charge and discharge management unit is used to control the charge and discharge of the battery.

Optionally, the communication module adopts 4G and carrier dual channels.

Optionally, the capacity of the DDR4 memory chip is greater than or equal to 256MB.

Optionally, the battery adopts a removable 7.4V·2200mAh intelligent wide-temperature lithium battery.

The memory module in this embodiment of the application includes a flash chip and a DDR4 memory chip, wherein the number of DDR4 memory chips can be set as required, and the memory module in this embodiment has the advantages of large storage space and fast transmission speed. The flash chip is equipped with multiple DDR4 memory chips, which ensures the data throughput capacity and can meet the needs of a large amount of data storage for a long time. The power management module in the embodiment includes a battery and a charge-discharge management unit. The battery can be a detachable 7.4V2200mAh intelligent wide-temperature lithium battery, which has the advantages of small size, large capacity, and can be disassembled and replaced at any time. The charge and discharge management unit charges the battery when the power is turned on; when the battery is not used for a long time, the charge and discharge management module automatically releases the remaining power of the battery to ensure the service life of the battery. In the embodiment of the present application, the communication module adopts 4G and carrier dual channels, and the dual channels ensure the reliability of data transmission. The carrier channel can be directly connected with the carrier channel of the power station, enabling faster data upload.

The working process of the device of the present application includes two parts of the work flow of measuring the VFTO voltage signal and the current signal. Among them, the process of measuring the VFTO voltage signal is: place the photoelectric sensor near the GIS, when the VFTO voltage signal is generated, the photoelectric sensor captures the change of the electric field intensity, and the non-contact voltage acquisition module converts the electric field intensity into a voltage signal and transmits it to the The data processing module manages the data, stores the data through the storage module, and completes the data transmission through the communication module.

The process of measuring the VFTO current signal is: place the printed circuit board (PCB) magnetic field detection probe and the radar ranging module near the GIS. When the VFTO current signal is generated, the magnetic field detection probe detects the change of the magnetic field strength, and the radar ranging module measures the magnetic field detection. The distance between the probe and the high-voltage bus inside the GIS, the non-contact current acquisition module converts the magnetic field strength into the corresponding current signal, and transmits it to the data processing module for data management. The data is stored by the storage module and sent through the communication module. The device of the present invention can realize non-contact measurement of VFTO voltage and current signals outside the GIS alone, and can also realize non-contact measurement of VFTO voltage and current signals at the same time.

Due to the use of external non-contact voltage acquisition modules and current acquisition modules in this application, the complete set of detection devices does not require capacitive probes or pre-embedded electrodes in the GIS, and deeply integrates the sensing device end, so that the VFTO signal can be realized outside the GIS. Online real-time detection; the use of removable lithium batteries to ensure long-term power supply, can continuously observe and capture VFTO signal waveforms, and achieve long-term online real-time detection of VFTO signals outside the GIS. The device of the invention is simple in structure, moderate in cost, easy to implement, and has excellent use effect, and is suitable for popularization and use.

Similar parts between the embodiments provided in the present application may be referred to each other. The specific embodiments provided above are just a few examples under the general concept of the present application, and do not constitute a limitation on the protection scope of the present application. For those skilled in the art, any other implementations expanded according to the solution of the present application without creative work fall within the protection scope of the present application.

Claims (9)

1. An external non-contact VFTO signal measuring device is characterized in that, comprising: non-contact voltage acquisition module (1), non-contact current acquisition module (2), data processing module (3), storage module (4) ), a power management module (5) and a communication module (6), wherein the non-contact voltage acquisition module (1) and the non-contact current acquisition module (2) are all connected with the data processing module (3), and the storage module ( 4) The communication module (6) is respectively connected with the data processing module (3), and the data processing module (3), the storage module (4) and the communication module (6) are all connected with the power management module (5). 2. An external non-contact VFTO signal measuring device according to claim 1, wherein the non-contact voltage acquisition module (1) comprises a photoelectric sensor (7), a laser unit and an electric field intensity conversion unit, The photoelectric sensor (7) is respectively connected to the laser unit and the electric field intensity conversion unit through an optical fiber, and the photoelectric sensor (7) and the laser unit are used to obtain the electric field intensity, and the electric field intensity conversion unit is used to obtain the electric field intensity. A signal that converts the strength of an electric field into a voltage. 3. An external non-contact VFTO signal measuring device according to claim 1, wherein the non-contact current acquisition module (2) comprises a magnetic field detection probe (8), a radar ranging unit (9) With the magnetic field intensity conversion unit, the magnetic field detection probe (8) and the radar ranging unit (9) are respectively connected with the magnetic field intensity conversion unit through optical fibers, and the magnetic field detection probe is used to detect the magnetic field, and the radar The distance measuring unit is used to measure the distance between the magnetic field detection probe and the high-voltage bus bar inside the GIS, and the magnetic field intensity conversion unit converts the magnetic field intensity into a corresponding current signal. 4. An external non-contact VFTO signal measuring device according to claim 1, wherein the data processing module (3) comprises an ARM processor and an STM32 single-chip microcomputer. 5 . An external non-contact VFTO signal measuring device according to claim 1 , wherein the storage module ( 4 ) comprises a flash chip and a DDR4 storage chip. 6 . 6. An external non-contact VFTO signal measuring device according to claim 1, wherein the power management module (5) comprises a battery and a charge and discharge management unit, the battery and the charge and discharge management unit connected, the charge and discharge management unit is used to control the charge and discharge of the battery. 7. An external non-contact VFTO signal measuring device according to claim 1, characterized in that, the communication module (6) adopts 4G and carrier dual channels. 8 . The external non-contact VFTO signal measuring device according to claim 5 , wherein the capacity of the DDR4 memory chip is greater than or equal to 256MB. 9 . 9 . An external non-contact VFTO signal measuring device according to claim 6 , wherein the battery adopts a removable 7.4V·2200mAh intelligent wide-temperature lithium battery. 10 .

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