CN203595784U - Supersonic wave partial discharge detection device used for high-voltage electrical device - Google Patents
Supersonic wave partial discharge detection device used for high-voltage electrical device Download PDFInfo
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- CN203595784U CN203595784U CN201320807177.3U CN201320807177U CN203595784U CN 203595784 U CN203595784 U CN 203595784U CN 201320807177 U CN201320807177 U CN 201320807177U CN 203595784 U CN203595784 U CN 203595784U
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Abstract
The utility model discloses a supersonic wave partial discharge detection device used for a high-voltage electrical device. The supersonic wave partial discharge detection device specifically comprises multi-path ultrasonic sensors, a multi-channel electronic switch chip, a multi-channel band pass filter with an amplification function, a multiplex switch, a multi-channel analog-to-digital converter and an MCU controller, all of which are arranged in the detection device and are connected in sequence. The supersonic wave partial discharge detection device further comprises a decoder serially connected between the multi-channel electronic switch chip and the MCU controller, and a display and a keyboard which are connected with the MCU controller. The multi-channel electronic switch chip and the multiplex switch are respectively connected with the MCU controller and controlled by the MCU controller. The channel number of the multi-channel electronic switch chip and the channel number of the multi-channel band pass filter are respectively identical with the number of the multi-path ultrasonic sensors. Compared with the prior art, by adopting the supersonic wave partial discharge detection device, operating personnel are not required to approach a measured device body to attach or install sensors thereon, so that the time for the arrangement of independent measuring points is saved, and the time-delay introducing error of each external measuring channel is effectively reduced.
Description
Technical field
The utility model relates to a kind of non-contact type ultrasonic local discharge detection device for high voltage electric equipment.
Background technology
Traditional ultrasound wave Partial Discharge Detection is mainly by a set of main frame, a set of external sensor and pre-amplifier unit composition.If need to detect the high-tension apparatus of a larger plane, need sensor to move around in equipment surface, or adopt multiple sensor to paste respectively high-tension apparatus surface, then the temporal characteristics, orientative feature and the amplitude characteristic that by a set of main frame, different passages are detected gather calculating, the final region that draws high-tension apparatus surface-discharge that forms.Mainly there are following three outstanding defects in this traditional detection method: the first, and multiple sensor layout expends time in longer, for obtaining more accurate partial discharge position, still needs movable sensor position to dwindle hunting zone; The second, during due to test, need personnel that sensor is applied to high-tension apparatus surface, if being not in good state, high-tension apparatus surface insulation there are more serious electric discharge phenomena, testing installation personnel may have personal safety; The 3rd, detect data and mainly still rely on the figure spectrum signature of simple electric discharge amplitude, discharge frequency, electric discharge number or electric discharge to analyze, make tester need to take into account variation and the associate feature thereof of multiple parameters, thereby improved the threshold that detects judgement.
Utility model content
The purpose of this utility model is exactly for the deficiencies in the prior art, a kind of non-contact type ultrasonic local discharge detection device for high voltage electric equipment is provided, do not need operating personnel to go to stick or sensor installation near equipment under test body, can reduce the time of arranging independent measurement point, also can effectively reduce the time delay of each externally measured passage and introduce error.
For achieving the above object, the technical solution of the utility model is:
A kind of ultrasound wave local discharge detection device for high voltage electric equipment the utility model proposes, specifically comprise: be built in described pick-up unit, connected multiplex ultrasonic sensor successively, multiple-channel electronic switches chip, with the hyperchannel bandpass filter of enlarging function, multiplexer switch, multipath A/D converter, MCU controller; Be built in described pick-up unit, be series at the signalling channel code translator between multiple-channel electronic switches chip and MCU controller; The display and the keyboard that are connected with MCU controller; Multiple-channel electronic switches chip is connected with MCU controller respectively with multiplexer switch, is subject to the control of MCU controller; Multiple-channel electronic switches chip is identical with the quantity of multiplex ultrasonic sensor with the port number of hyperchannel bandpass filter.
The utility model adopts the complete built-in design of a set of multiplex ultrasonic sensor, and multichannel ultrasonic is detected simultaneously becomes possibility; By the hyperchannel bandpass filter with enlarging function, realize bandpass filtering and amplification to feeble signal, therefore sensor is without the tested high-tension apparatus of contact, thereby realized remote detection.The voltage threshold of multiple-channel electronic switches chip is subject to the control of MCU controller, only has when signal voltage reaches and sets after threshold value, and the switch of the electronic switch chip inside of respective channel just can be automatically closed, thereby send into follow-up filtering and analog to digital converter; For the signal that not yet reaches electronic switch triggering thresholding, the switch of the electronic switch chip inside of respective channel is in off-state, and the signal of exporting by electronic switch is thus zero.Meanwhile, in the time that input signal amplitude is too high, the electronic switch chip of respective channel will carry out slicing processing to signal amplitude, thereby restriction maximum output voltage plays the object of protecting late-class circuit.When after the electronic switch closes of electronic switch chip inside, when signal is entered late-class circuit and is processed by electronic switch, code translator also obtains the passage (following the tracks of the channel address that meets threshold voltage input signal) of signal output simultaneously, and this channel address information is sent into MCU controller and store, for follow-up demonstration and imaging provide accurate azimuth information.Adopt the benefit of code translator and multiplexer switch to be, the port number of the analog to digital converter of late-class circuit can be less than multiplex ultrasonic sensor quantity, only need after the information of MCU controller address acquisition code translator, by controlling multiplexer switch, analog to digital converter is carried out to corresponding sampling channel switching, thereby reduce as far as possible volume and the manufacturing cost of pick-up unit.
Described pick-up unit can also be provided with the USB port being connected with described MCU controller, can supply exterior PC control, data interaction and external dc power by USB port to pick-up unit in-line power.Described pick-up unit can also be provided with internal battery for supporting pick-up unit work and supporting charging circuit.Described multiplex ultrasonic sensor is Miniature precision ultrasonic sensor, and frequency range is 10-300kHz.The speed of described multipath A/D converter is 100kHz-2MHz, and precision is 12-16 position.Described MCU controller can be CPLD or FPGA structure controller.
Compared with prior art, the beneficial effects of the utility model are: compare traditional pasting type sensor measurement for independent measurement point, the test of the non-contact type ultrasonic local discharge detection device the utility model proposes based on to regional ultrasonic surface discharge signal, adopt multiplex ultrasonic sensor entirely built-in, do not need operating personnel to go to stick or sensor installation near equipment under test body, can reduce the time of arranging independent measurement point, also can effectively reduce the time delay of each externally measured passage and introduce error; Simultaneously, because testing needle is to certain measured zone, and pass through the Signal Message Address of multiple-channel electronic switches chip by inner code translator energy Real-time Obtaining, for viewing area provider's bit address information, therefore can calculate fast the gain inequality of built-in multiplex ultrasonic sensor, thereby the computing method that adopt ultrasonic energy to propagate, draw the visual demonstration result of a set of cluster, the orientative feature of the amplitude of ultrasonic of detection, frequency and detection is mapped to the output scheme of colourity square, make to be easily understood, be convenient to grasp and identify the order of severity of shelf depreciation.
Accompanying drawing explanation
Fig. 1 is the inner structure schematic diagram of ultrasound wave local discharge detection device.
Fig. 2 is that in embodiment, 4 road supersonic sensing implement bodies are arranged orientation schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is further described.
As shown in Figure 1 and Figure 2.Carry out ultrasound wave Partial Discharge Detection for the 35kV transformer moving, adopt non-contact type ultrasonic local discharge detection device of the present utility model.Described pick-up unit inside comprises: the ultrasonic sensor that 4 tunnel frequency ranges are 10-300kHz, the 4 channel electron switch chips that are connected with No. 4 ultrasonic sensors respectively, 4 channel bandpass filters with enlarging function that are connected with 4 channel electron switch chips respectively, the 2 tunnel multiplex switch that are connected with 4 channel bandpass filters, be connected with 2 tunnel multiplex switch, speed is 100kHz-2MHz, precision is 2 channel modulus converters (can simultaneously process the collection of 2 road signals) of 12-16 position, the MCU controller being connected with 2 channel modulus converters, be specially CPLD structure controller, be series at the signalling channel code translator between 4 channel electron switch chips and MCU controller, 4 channel electron switch chips are connected with MCU controller respectively with 2 tunnel multiplex switch, are subject to the control of MCU controller.No. 4 ultrasonic sensors have respectively different azimuth informations, specifically arrange that azimuth information as shown in Figure 2.Described pick-up unit is also provided with the display, keyboard and the USB port that are connected with MCU controller, is also provided with internal battery and supporting charging circuit.
When detection, hold above-mentioned detection device and stand on apart from transformer 2m position, the threshold voltage that 4 channel electron switch chips are set by MCU controller is 300mV.First trigger No. 4 ultrasonic sensors and start working, ultrasonic sensor starts to respond to external ultrasound wave energy, and converts ultrasonic signal to electric signal.Now, 4 channel electron switch chips start respectively to detect input end signal and whether reach setting threshold value; After testing, the passage that signal measurement amplitude reaches threshold value is 1 and 4, and passage 2 and 3 is because signal is left in the basket a little less than too; So the switch of the electronic switch chip inside of passage 1 and 4 correspondences is automatically closed, thereby sends into follow-up filtering and analog to digital converter, the switch of the electronic switch chip inside of passage 2 and 3 correspondences is in off-state.Meanwhile, the address of code translator Acquisition channel 1 and 4, and send into MCU controller.MCU controller, by controlling 2 tunnel multiplex switch, is switched to 1 and 4 passages by 2 channel modulus converters, then trigger mode number converter work.Combine by code translator and 2 tunnel multiplex switch, MCU controller can Obtaining Accurate when the data of pre-test be from which passage, can fast detecting to the position of maximum ultrasonic measurement point.According to the azimuth information of passage 1 and 4, can find out that the two ends, left and right of surveyed area exist comparatively significantly ultrasonic signal.Describe ultrasonic intensity difference according to the signal gain of passage 1 and 4, and these different informations are sent into display, can draw the colored displaying scheme of different colours power.
Claims (6)
1. the ultrasound wave local discharge detection device for high voltage electric equipment, it is characterized in that, described pick-up unit comprises: be built in described pick-up unit, connected multiplex ultrasonic sensor successively, multiple-channel electronic switches chip, with the hyperchannel bandpass filter of enlarging function, multiplexer switch, multipath A/D converter, MCU controller; Be built in described pick-up unit, be series at the signalling channel code translator between multiple-channel electronic switches chip and MCU controller; The display and the keyboard that are connected with MCU controller; Multiple-channel electronic switches chip is connected with MCU controller respectively with multiplexer switch, is subject to the control of MCU controller; Multiple-channel electronic switches chip is identical with the quantity of multiplex ultrasonic sensor with the port number of hyperchannel bandpass filter.
2. the ultrasound wave local discharge detection device for high voltage electric equipment according to claim 1, is characterized in that: the frequency range of described multiplex ultrasonic sensor is 10-300kHz.
3. the ultrasound wave local discharge detection device for high voltage electric equipment according to claim 1, is characterized in that: the speed of described multipath A/D converter is 100kHz-2MHz, precision is 12-16 position.
4. the ultrasound wave local discharge detection device for high voltage electric equipment according to claim 1, is characterized in that: described MCU controller is CPLD or FPGA structure controller.
5. according to the arbitrary described ultrasound wave local discharge detection device for high voltage electric equipment of claim 1-4, it is characterized in that: be provided with the USB port being connected with described MCU controller.
6. according to the arbitrary described ultrasound wave local discharge detection device for high voltage electric equipment of claim 1-4, it is characterized in that: be provided with internal battery and supporting charging circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320807177.3U CN203595784U (en) | 2013-12-10 | 2013-12-10 | Supersonic wave partial discharge detection device used for high-voltage electrical device |
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| CN201320807177.3U CN203595784U (en) | 2013-12-10 | 2013-12-10 | Supersonic wave partial discharge detection device used for high-voltage electrical device |
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| CN203595784U true CN203595784U (en) | 2014-05-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237682A (en) * | 2014-09-02 | 2014-12-24 | 国家电网公司 | Transformer abnormal sound analysis device |
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- 2013-12-10 CN CN201320807177.3U patent/CN203595784U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237682A (en) * | 2014-09-02 | 2014-12-24 | 国家电网公司 | Transformer abnormal sound analysis device |
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Granted publication date: 20140514 |