Portable partial discharge detection equipment fused with ultrahigh-frequency high-frequency current ultrasonic waves

Abstract

The utility model provides portable partial discharge detection equipment fused with ultrahigh-frequency high-frequency current ultrasonic waves, which relates to the technical field of partial discharge detection of power equipment and comprises a singlechip control module, a high-speed card channel, a low-speed card channel, a high-speed acquisition card, a low-speed acquisition card and an industrial computer mainboard, the high-speed card channel comprises a high-speed card channel BNC plug, a first two-to-one signal change-over switch, a 300-1500M filter, a 3-30M filter, an ultrahigh-frequency program-controlled amplifier, a high-frequency current program-controlled amplifier and a second two-to-one signal change-over switch, and the low-speed card channel comprises a low-speed card channel BNC plug, a 20-400K filter and an ultrasonic program-controlled amplifier. According to the utility model, a double-acquisition-card synchronous sampling mechanism is adopted to realize acoustoelectric combined acquisition, a multichannel multiplexing design is adopted, the cost is reduced, the weight is reduced, a double-acquisition-card synchronous sampling mode is adopted, the cost is reduced, and precious analog signal acquisition channel resources can be fully utilized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the partial discharge detection technical field of electric power equipment, especially to a kind of portable partial discharge detection equipment of fusion ultrahigh frequency high frequency current ultrasonic wave. BACKGROUND

[0002] At present, the ultrasonic wave multi-signal acoustic-electric combined partial discharge detection scheme of ultrahigh frequency high frequency current generally has the following several kinds:

[0003] 1, all-weather online monitoring scheme. The patent CN111273140B proposes a kind of transformer partial discharge monitoring positioning system using multiple composite sensors, the scheme focuses on the innovation of positioning method, uses more hardware, is relatively bulky, therefore can only be used as fixed online monitoring, and the flexibility is poor. The patent CN216646699U is mainly aimed at GIS equipment, but increases humidity variable, the scheme is also online monitoring equipment, lacks portability, and there are errors in key high-speed signal analog-digital conversion, multi-data storage description, for example, ultrahigh frequency original signal 300-1500MHz, ultrasonic wave signal 20-300KHz, and the gain bandwidth product of signal amplification unit Texas Instruments IN333 used in the scheme is only 50KHz, and the sampling rate of analog-digital conversion unit Texas Instruments ADS1015 is only 3.3K, which cannot realize the expected function from the parameters. The patent CN118311393A proposes a kind of sound-light-electricity composite monitoring scheme, the scheme mainly focuses on the design of sensor itself, and the number of channels is less, cannot realize positioning, is relatively bulky, and is only suitable for fixed online monitoring. The patent CN119270008A mainly innovates in detection method, and the description of monitoring device is relatively brief, and it is also difficult to realize flexible detection. The patent CN207096378U designs acoustic-electric combined system for open light cabinet partial discharge monitoring, but high and low sampling rate channels are shared, which wastes sampling channels and uses large materials for small purposes.

[0004] 2, use high-speed oscilloscope field wiring detection. The patent CN212905251U uses finished product oscilloscope for sampling. The scheme often only views waveform due to the software function of oscilloscope is solidified, it is difficult to realize historical data query, complex algorithm analysis etc., and since high-speed oscilloscope volume weight is relatively large, overall equipment is relatively bulky.

[0005] 3, using high-speed acquisition card portability equipment for detection scheme. Patent CN202433482U uses high-speed card to collect ultrahigh frequency and high frequency current, and uses low-speed card to collect ultrasonic signal and power frequency voltage signal. This way, ultrahigh frequency signal and high frequency current signal cannot be multiplexed, which makes the acquisition card need to use different channels to collect respectively, and at the same time, low-speed card channel is used to collect 50Hz power frequency signal, which wastes the valuable channel resources of low-speed card. Therefore, if the device wants to be a multi-channel (for example, four-channel) device, there is a problem of being bulky and poor portability. Patent CN106841939A uses FPGA+DSP to realize sound and electricity joint collection, but does not increase high frequency current signal and does not have power frequency synchronous sampling module. At the same time, the computing power of DSP chip is limited, and it is difficult to realize the running and real-time updating of complex algorithms.

[0006] Therefore, it is very necessary to design a portable partial discharge detection device integrating ultrahigh frequency, high frequency current and ultrasonic wave. SUMMARY

[0007] In order to overcome the shortcomings of the prior art, the purpose of the utility model is to provide a portable partial discharge detection device integrating ultrahigh frequency, high frequency current and ultrasonic wave.

[0008] In order to achieve the above-mentioned purpose, the utility model provides the following scheme:

[0009] The utility model provides a portable partial discharge detection device integrating ultrahigh frequency, high frequency current and ultrasonic wave, which comprises a single-chip microcomputer control module, a high-speed card channel, a low-speed card channel, a high-speed acquisition card, a low-speed acquisition card and an industrial computer mainboard, the high-speed card channel and the low-speed card channel are respectively provided with four;

[0010] The high-speed card channel comprises a high-speed card channel BNC plug, a first two-to-one signal switch, 300-1500M filtering, 3-30M filtering, an ultrahigh frequency program-controlled amplifier, a high frequency current program-controlled amplifier and a second two-to-one signal switch, the ultrahigh frequency analog circuit and the high frequency current analog circuit are connected with the high-speed card channel BNC plug, and both share one high-speed card channel BNC plug, the high-speed card channel BNC plug is connected with the first two-to-one signal switch, the first two-to-one signal switch is connected with the 300-1500M filtering and the 3-30M filtering respectively, the 300-1500M filtering is connected with the ultrahigh frequency program-controlled amplifier, the 3-30M filtering is connected with the high frequency current program-controlled amplifier, the ultrahigh frequency program-controlled amplifier and the high frequency current program-controlled amplifier are connected with the second two-to-one signal switch, and the second two-to-one signal switch is connected with the high-speed acquisition card, and the first two-to-one signal switch, the ultrahigh frequency program-controlled amplifier, the high frequency current program-controlled amplifier and the second two-to-one signal switch are connected with the single-chip microcomputer control module;

[0011] The low-speed card channel comprises a low-speed card channel BNC plug, 20-400K filtering and an ultrasonic wave program-controlled amplifier, the ultrasonic wave analog circuit is connected with the low-speed card channel BNC plug, the low-speed card channel BNC plug is connected with the 20-400K filtering, the 20-400K filtering is connected with the ultrasonic wave program-controlled amplifier, the ultrasonic wave program-controlled amplifier is connected with the low-speed acquisition card, and the ultrasonic wave program-controlled amplifier is connected with the single-chip microcomputer control module.

[0012] The single-chip microcomputer control module, the high-speed acquisition card, the low-speed acquisition card and the industrial computer mainboard are provided with a power frequency phase synchronization mechanism.

[0013] Preferably, the single-chip microcomputer control module is connected with the industrial computer mainboard through a 1Mbps high-speed serial port.

[0014] Preferably, the high-speed acquisition card is connected with the industrial computer mainboard through a PCIe4.0 interface.

[0015] Preferably, the low-speed acquisition card is connected with the industrial computer mainboard through a USB3.0 interface.

[0016] Preferably, the high-speed card trigger output of the high-speed acquisition card is connected with the low-speed card trigger input of the low-speed acquisition card, and the low-speed card trigger output of the low-speed acquisition card is connected with the high-speed card trigger input of the high-speed acquisition card.

[0017] According to the specific embodiments of the utility model, the utility model discloses the following technical effects:

[0018] The utility model provides a kind of portable partial discharge detection equipment of fusion ultra-high frequency high frequency current ultrasonic wave, including single-chip microcomputer control module, high-speed card channel, low-speed card channel, high-speed acquisition card, low-speed acquisition card and industrial computer mainboard, the high-speed card channel includes high-speed card channel BNC plug, first two turns one signal switch, 300-1500M filtering, 3-30M filtering, ultra-high frequency program-controlled amplifier, high frequency current program-controlled amplifier and second two turns one signal switch, the low-speed card channel includes low-speed card channel BNC plug, 20-400K filtering and ultrasonic wave program-controlled amplifier.The utility model has following advantages:

[0019] 1, the utility model uses dual acquisition card synchronous sampling mode, uses different sampling rate's acquisition card for different signals, uses high-speed card for such high frequency radio frequency signal of ultra-high frequency high frequency current, uses low-speed card for ultrasonic signal, and uses more low-speed power frequency synchronization module for power frequency synchronization signal, and different processing of different signals is realized, and the advantage of this is to reduce cost, make full use of valuable analog signal acquisition channel resources;

[0020] 2、Adopt multi-channel multiplexing design, in order to realize the overall equipment portability and light weight, realize the multiplexing of multiple situations, ultra-high frequency, high frequency current, share 1 BNC interface, BNC plug connects a two-way signal conversion switch, its function is to distribute the signal on the BNC plug, can be connected to the ultra-high frequency analog circuit, high frequency current analog circuit, that is, through a two-way signal switching switch, the BNC plug can be connected to the 300-1500M filter circuit, 3-30M filter circuit respectively, ultra-high frequency signal and high frequency current signal share the acquisition channel of high-speed acquisition card, ultra-high frequency signal channel and high frequency current signal channel share the acquisition channel of high-speed acquisition card, therefore, after the ultra-high frequency program-controlled amplifier, the high frequency current local alarm signal after the high frequency current program-controlled amplifier enters the two-way signal switching switch, after switching, two-way enters the acquisition channel of high-speed acquisition card, channel multiplexing reduces the cost and reduces the weight;

[0021] 3, adopt double acquisition card synchronous sampling mechanism, high-speed acquisition card and low-speed acquisition card need to realize synchronous sampling, which uses external trigger function, the trigger output of low-speed acquisition card is connected to the trigger input of high-speed acquisition card, and the trigger output of high-speed acquisition card is directly connected to the trigger input of low-speed acquisition card, so that the two cards can realize master-slave trigger synchronous sampling, the single-chip microcomputer control module is connected with the industrial computer mainboard through a 1Mbps high-speed serial port, the high-speed acquisition card is connected with the industrial computer mainboard through a PCIe 4.0 interface, and the low-speed acquisition card is connected with the industrial computer mainboard through a USB 3.0, the power frequency synchronization module in the single-chip microcomputer control module can collect 50hz power frequency voltage or current to keep synchronization with the power grid, and convert the power frequency signal into 50hz synchronization pulse and finally into power grid phase information, the industrial computer mainboard communicates with the single-chip microcomputer control module through the high-speed serial port and obtains the power grid phase, so as to obtain the power grid phase value of the discharge waveform at time t collected by the high-speed acquisition card and the low-speed acquisition card, thereby drawing PRPS and PRPD maps, and realizing sound and electricity combined acquisition.

[0022] 4, the whole is designed to be portable, meanwhile, the BNC interface multiplexing and high-speed card and low-speed card multiplexing mode reduce the weight of the overall equipment, and fully improve each analog sampling channel. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0024] Figure 1The whole structure diagram of the portable partial discharge detection equipment fusing ultrasonic waves of ultrahigh frequency and high frequency current is provided for the embodiment of the present application. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0026] The portable partial discharge detection equipment fusing ultrasonic waves of ultrahigh frequency and high frequency current is provided, a double-card sampling mode is used, a collection card with different sampling rates is used for different signals, a high-speed card is used for the radio frequency signal of ultrahigh frequency and high frequency current with high frequency, a low-speed card is used for ultrasonic signals, and a power frequency synchronization module with a lower speed is used for power frequency synchronization signals, so that different processing of different signals is realized, the cost is reduced, and the valuable analog signal collection channel resource is fully utilized.

[0027] In order to make the above-mentioned purposes, features and advantages of the present application more apparent, clear and understandable, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0028] As shown in Figure 1 The present application provides a portable partial discharge detection equipment fusing ultrasonic waves of ultrahigh frequency and high frequency current, which comprises a single-chip microcomputer control module, high-speed card channels, low-speed card channels, high-speed collection cards, low-speed collection cards and an industrial computer mainboard. The high-speed card channels and the low-speed card channels are provided with four high-speed card channels and four low-speed card channels respectively, which are high-speed card channel 1, high-speed card channel 2, high-speed card channel 3, high-speed card channel 4, low-speed card channel 5, low-speed card channel 6, low-speed card channel 7 and low-speed card channel 8. Since the four high-speed card channels are completely consistent and the four low-speed card channels are completely consistent, Figure 1 The high-speed card channel 2, the high-speed card channel 3, the high-speed card channel 4, the low-speed card channel 6, the low-speed card channel 7 and the low-speed card channel 8 are omitted, and only the structure schematic diagram of the high-speed card channel 1 and the low-speed card channel 5 is given.

[0029] The high-speed card channel is used for receiving ultra-high frequency signals and high-frequency current signals, and comprises a high-speed card channel BNC plug (the ultra-high frequency signals and the high-frequency current signals share one high-speed card channel BNC plug, and the high-speed card channel BNC plug is arranged on a portable instrument panel), a first two-to-one signal switching switch, 300-1500M filtering, 3-30M filtering, an ultra-high frequency programmable amplifier, a high-frequency current programmable amplifier and a second two-to-one signal switching switch, the ultra-high frequency analog circuit and the high-frequency current analog circuit are connected with the high-speed card channel BNC plug, and share one high-speed card channel BNC plug, the high-speed card channel BNC plug is connected with the first two-to-one signal switching switch, and is used for distributing signals on the high-speed card channel BNC plug, the first two-to-one signal switching switch is connected with the 300-1500M filtering and the 3-30M filtering respectively, the 300-1500M filtering is connected with the ultra-high frequency programmable amplifier, the ultra-high frequency programmable amplifier can realize 20db and 40db amplification gains, the 3-30M filtering is connected with the high-frequency current programmable amplifier, the high-frequency current programmable amplifier can realize 0db, 10db, 20db and 40db amplification gains, the ultra-high frequency programmable amplifier and the high-frequency current programmable amplifier are connected with the second two-to-one signal switching switch, the second two-to-one signal switching switch is connected with the high-speed acquisition card, and the first two-to-one signal switching switch, the ultra-high frequency programmable amplifier, the high-frequency current programmable amplifier and the second two-to-one signal switching switch are connected with the single-chip microcomputer control module.

[0030] The ultra-high frequency signal channel and the high-frequency current signal channel share the acquisition channel of the high-speed acquisition card, so that the ultra-high frequency signal enters the two-to-one signal switching switch after passing through the ultra-high frequency programmable amplifier, and the high-frequency current signal enters the two-to-one signal switching switch after passing through the high-frequency current programmable amplifier, the two-to-one signal switching switch is switched, and then the two-to-one signal switching switch enters the acquisition channel of the high-speed acquisition card, the high-speed acquisition card is expensive and bulky, and channel multiplexing reduces the cost and the weight.

[0031] The single-chip microcomputer control module indirectly controls the first two-to-one signal switching switch and the second two-to-one signal switching switch through outputting a switching level signal, so that the signal channel switching is realized.

[0032] The single-chip microcomputer control module indirectly controls the ultra-high frequency programmable amplifier, the high-frequency current programmable amplifier and the ultrasonic programmable amplifier through outputting a switching level signal, so that the gain adjustment of the ultra-high frequency signal, the high-frequency current signal and the ultrasonic signal is realized.

[0033] The low-speed card channel includes a low-speed card channel BNC plug (provided on a portable instrument panel), a 20-400K filter and an ultrasonic wave program-controlled amplifier, an ultrasonic wave analog circuit is connected to the low-speed card channel BNC plug, the low-speed card channel BNC plug is connected to the 20-400K filter, the 20-400K filter is connected to the ultrasonic wave program-controlled amplifier, the ultrasonic wave program-controlled amplifier can realize amplification gains of 0db, 20db, 40db and 60db, the ultrasonic wave program-controlled amplifier is connected to the low-speed acquisition card, and the ultrasonic wave program-controlled amplifier is connected to the single-chip microcomputer control module.

[0034] The single-chip microcomputer control module, the high-speed acquisition card, the low-speed acquisition card and the industrial computer mainboard are provided with a double-acquisition-card synchronization mechanism, the high-speed acquisition card is connected to the industrial computer mainboard through a PCIe4.0 interface, the low-speed acquisition card is connected to the industrial computer mainboard through a USB3.0 interface, the high-speed acquisition card and the low-speed acquisition card need to realize synchronous sampling, so an external trigger function is used, a high-speed card trigger output of the high-speed acquisition card is connected to a low-speed card trigger input of the low-speed acquisition card, and a low-speed card trigger output of the low-speed acquisition card is connected to a high-speed card trigger input of the high-speed acquisition card, so that the two cards can realize master-slave trigger synchronous sampling.

[0035] The single-chip microcomputer control module, the high-speed acquisition card, the low-speed acquisition card and the industrial computer mainboard are provided with a power frequency phase synchronization mechanism, the single-chip microcomputer control module is connected to the industrial computer mainboard through a 1Mbps high-speed serial port, a power frequency synchronization module in the single-chip microcomputer control module can collect 50hz power frequency voltage or current to keep synchronization with a power grid, and convert the power frequency signal into a 50hz synchronization pulse to an external interrupt of the single-chip microcomputer, the single-chip microcomputer sends zero-crossing time information to the industrial computer mainboard through the high-speed serial port after receiving the external interrupt, so as to inform the industrial computer mainboard of the zero-crossing time of the power grid, the industrial computer mainboard communicates with the single-chip microcomputer control module through the high-speed serial port and obtains the phase of the power grid, so that the phase value of the power grid at the moment when the discharge waveform is collected by the high-speed acquisition card and the low-speed acquisition card can be obtained, and the discharge waveform phase atlas can be drawn.

[0036] The industrial computer mainboard runs an upper computer program, the program can realize joint collection of super high frequency signals, high frequency current signals and ultrasonic wave signals, the upper computer program is Q / LD8 series collection software-SMS-2301 software of Chengdu Maisuo Electrical Co., Ltd., and the upper computer program can realize discharge waveform drawing of the super high frequency, high frequency current and ultrasonic wave signals.

[0037] The industrial computer simultaneously runs a control program, the control program can indirectly control channel switching and signal gain adjustment through the single-chip microcomputer control module.

[0038] Exemplarily, the source code of the program on the industrial computer of the embodiment for switching the high-speed serial control signal channel is referred to https: / / blog.csdn.net / WYW35416 / article / details / 136598250; the serial communication of the embodiment is referred to https: / / blog.csdn.net / WYW35416 / article / details / 136598250. That is, the high-speed serial control signal channel switching program and the serial communication program of the embodiment are both mature prior art, and the technical solution of the embodiment will not be described in detail.

[0039] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0040] The principle and implementation mode of the present application are described by applying specific examples in this paper. The above description of the embodiments is only used to help understand the method and core idea of the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed. In conclusion, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A portable partial discharge detection device that fuses ultrahigh frequency high frequency current ultrasonic waves, characterized by, Include: Single-chip microcomputer control module, high-speed card channel, low-speed card channel, high-speed acquisition card, low-speed acquisition card and industrial computer mainboard, the high-speed card channel and low-speed card channel are provided with four respectively; The high-speed card channel includes high-speed card channel BNC plug, first two-to-one signal switch, 300-1500M filter, 3-30M filter, UHF program-controlled amplifier, high-frequency current program-controlled amplifier and second two-to-one signal switch, UHF analog circuit and high-frequency current analog circuit are connected with the high-speed card channel BNC plug, both share a high-speed card channel BNC plug, the high-speed card channel BNC plug is connected with the first two-to-one signal switch, the first two-to-one signal switch is connected with the 300-1500M filter and 3-30M filter respectively, the 300-1500M filter is connected with the UHF program-controlled amplifier, the 3-30M filter is connected with the high-frequency current program-controlled amplifier, the UHF program-controlled amplifier and high-frequency current program-controlled amplifier are connected with the second two-to-one signal switch, the second two-to-one signal switch is connected with the high-speed acquisition card, the first two-to-one signal switch, UHF program-controlled amplifier, high-frequency current program-controlled amplifier and second two-to-one signal switch are connected with the single-chip microcomputer control module; The low-speed card channel includes low-speed card channel BNC plug, 20-400K filter and ultrasonic program-controlled amplifier, ultrasonic analog circuit is connected with the low-speed card channel BNC plug, the low-speed card channel BNC plug is connected with the 20-400K filter, the 20-400K filter is connected with the ultrasonic program-controlled amplifier, the ultrasonic program-controlled amplifier is connected with the low-speed acquisition card, and the ultrasonic program-controlled amplifier is connected with the single-chip microcomputer control module; The single-chip microcomputer control module, high-speed acquisition card, low-speed acquisition card and industrial computer mainboard are provided with power frequency phase synchronization mechanism.

2. The portable partial discharge detection device according to claim 1, characterized in that The single-chip microcomputer control module is connected with the industrial computer mainboard through 1Mbps high-speed serial port.

3. The portable partial discharge detection device of claim 1, wherein, The high-speed acquisition card is connected with the industrial computer mainboard through PCIe4.0 interface.

4. The portable partial discharge detection device of claim 1, wherein, The low-speed acquisition card is connected with the industrial computer mainboard through USB3.0 interface.

5. The portable partial discharge detection device of claim 1, wherein, The high-speed card trigger output of the high-speed acquisition card is connected with the low-speed card trigger input of the low-speed acquisition card, and the low-speed trigger output of the low-speed acquisition card is connected with the high-speed card trigger input of the high-speed acquisition card.

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