CN111880052A - Hand-held type partial discharge detection device based on bluetooth interconnection terminal cluster - Google Patents
Hand-held type partial discharge detection device based on bluetooth interconnection terminal cluster Download PDFInfo
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- CN111880052A CN111880052A CN202010612417.9A CN202010612417A CN111880052A CN 111880052 A CN111880052 A CN 111880052A CN 202010612417 A CN202010612417 A CN 202010612417A CN 111880052 A CN111880052 A CN 111880052A
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- 238000004891 communication Methods 0.000 claims abstract description 22
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- 239000003086 colorant Substances 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims description 23
- 230000005540 biological transmission Effects 0.000 claims description 14
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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Abstract
The invention discloses a handheld partial discharge detection device based on a Bluetooth interconnection terminal cluster, which belongs to the technical field of high voltage and comprises a sensor and a mobile terminal; the sensor sensors are simultaneously placed at a plurality of switch cabinets with abnormal signals, the sensors are simultaneously connected with the mobile terminal through the Bluetooth communication module, the mobile terminal processes partial discharge data from different sensors in a multi-thread mode, the partial discharge data actually measured by different sensors are displayed in different colors or other marks on the same coordinate system on the mobile terminal, and the relation among the partial discharge fault types, the discharge strength and the abnormal signals at different positions is preliminarily judged. The invention can accurately judge the internal relation among the partial discharge signals at a plurality of abnormal positions.
Description
Technical Field
The invention provides a handheld partial discharge detection device based on a Bluetooth interconnection terminal cluster, and belongs to the technical field of high voltage.
Background
The power equipment has bad operation condition, latent defects exist in long-term operation of the equipment, and the importance of timely grasping the severity of the defects of the equipment in operation is significant for safe operation of a power system. At present, the in-transit equipment needing to carry out live detection mainly comprises a GIS, a switch cabinet, a transformer, a CVT, a lightning arrester, an isolating switch, a wall bushing and the like, wherein the equipment related to ultrahigh frequency and ultrasonic partial discharge testing mainly comprises the GIS, the switch cabinet, the transformer and the like. The partial discharge test method of the current equipment mainly comprises a handheld partial discharge test method and an online partial discharge test method, and the handheld partial discharge test method has the following characteristics: the ultrahigh frequency sensor, the ultrasonic sensor and the TEV sensor are respectively provided with only one sensor, and the three sensors can be connected with the mobile phone terminal, and the online partial discharge test method has the following characteristics: the ultrahigh frequency sensors and the ultrasonic sensors are multiple and can be simultaneously connected with a test host; however, the hand-held partial discharge test method has the following disadvantages: the similar sensors can only measure one abnormal position at the same time, cannot detect two or more abnormal positions, and are difficult to judge the relation among signals of a plurality of abnormal positions, and the online partial discharge test method has the following defects: the instrument has a large number and a large volume, is not suitable for general measurement and is only suitable for accurate detection. In order to solve the above problems, it is urgently needed to find an partial discharge detection method between general measurement and accurate measurement and between handheld and online detection instruments to accurately judge the internal relation between partial discharge signals at multiple abnormal positions.
Disclosure of Invention
The invention aims to provide a handheld partial discharge detection device based on a Bluetooth interconnection terminal cluster, which can overcome the defects and can accurately judge the internal relation among partial discharge signals at a plurality of abnormal positions.
In order to realize the above, the invention provides a hand-held partial discharge detection device based on a Bluetooth interconnection terminal cluster, which comprises a sensor and a mobile terminal;
the sensor sensors are simultaneously placed at a plurality of switch cabinets with abnormal signals, the sensors are simultaneously connected with the mobile terminal through the Bluetooth communication module, the mobile terminal processes partial discharge data from different sensors in a multi-thread mode, the partial discharge data actually measured by different sensors are displayed in different colors or other marks on the same coordinate system on the mobile terminal, and the relation among the partial discharge fault types, the discharge strength and the abnormal signals at different positions is preliminarily judged.
Preferably, the sensor comprises a signal receiver, the signal receiver is connected with a variable gain amplifier to adjust the amplitude of a signal to ensure that the partial discharge signal is accurately obtained, the variable gain amplifier realizes current-voltage signal conversion through a signal conversion circuit, the signal conversion circuit is connected with a filter to realize frequency band selection, the filter is connected with an analog-to-digital converter to realize conversion of the partial discharge analog quantity to a processor digital signal, and the analog-to-digital converter is connected with a bluetooth communication module I to realize transmission of the partial discharge digital quantity to the mobile terminal;
preferably, the mobile terminal comprises a Bluetooth communication module II, the Bluetooth communication module II receives digital signals from the sensor, the Bluetooth communication module II is connected with the microprocessor to extract and classify amplitude, phase and frequency of data, the microprocessor is connected with the data storage module to store partial discharge data, and the data storage module is connected with the partial discharge map display screen to display the partial discharge data from multiple angles of phase, amplitude and frequency;
preferably, the variable gain amplifier is an AD8330ACP chip having a 150MHz bandwidth, the basic gain function is linear in dB, controlled by the voltage applied to the VDBS pin, the gain range is 0dB to 50dB, the corresponding control voltage is 0V to 1.5V, and the slope is 30 mV/dB.
Preferably, the signal conversion circuit converts the current signal into a voltage signal, and is composed of an operational amplifier ADA4841-2, the maximum quiescent current of the operational amplifier is 1.5mA, the first half of the signal conversion circuit converts the input current signal into a voltage signal, and the second half of the circuit performs in-phase amplification or voltage following processing on the converted voltage signal and inputs the voltage signal into the filter circuit.
Preferably, the filter circuit is composed of operational amplifiers ADA4841-2, the filter is composed of a high-pass filter and a low-pass filter, the high-pass filter and the low-pass filter are respectively constructed by utilizing the two operational amplifiers ADA4841-2, and the high-pass filter and the low-pass filter are connected in series to realize the band-pass function of the filter.
Preferably, the analog-to-digital converter adopts a 16-bit sigma-delta ADC in the microprocessor, the conversion rate of the analog-to-digital converter is up to 50ksps in a single-channel mode, single-channel signal input and differential signal input modes are supported, and data collected by the analog-to-digital converter can be automatically stored in a buffer in the microprocessor, so that the running time of the system is reduced.
Preferably, the Bluetooth communication module adopts a CSR2.0 core chip, so that the Bluetooth transmission power consumption is low, the reliability is relatively stable, and the transmission speed is high. And the transparent transmission of data under the universal asynchronous serial communication protocol is supported. This bluetooth module has 5 pins in total, is ground connection, receipt, transmission, 3.3V and 5.0V power pin respectively.
Compared with the prior art, the invention has the beneficial effects that:
the sensors (ultrahigh frequency sensors or ultrasonic sensors or TEV sensors) of the same type are connected with the handheld mobile terminal at the same time, partial discharge signals tested by the sensors display partial discharge data actually measured by different sensors in different colors or other marks under the same coordinate system on the handheld mobile terminal, and the relation among the partial discharge fault type, the discharge strength and different abnormal position signals is preliminarily judged.
Drawings
FIG. 1 is a schematic block diagram of a sensor circuit of the present invention;
FIG. 2 is a functional block diagram of the inventive mobile terminal circuitry;
FIG. 3 is a schematic diagram of the connection of the present invention;
FIG. 4 is a schematic diagram of an amplifying circuit of the present invention;
FIG. 5 is a schematic diagram of a signal conversion circuit according to the present invention;
FIG. 6 is a schematic diagram of a filter circuit of the present invention;
fig. 7 is a circuit diagram of the bluetooth module of the present invention.
Detailed Description
Example 1
The invention is further described below with reference to the accompanying drawings, as shown in figures 1-7: the invention relates to a handheld partial discharge detection device based on a Bluetooth interconnection terminal cluster, which comprises a sensor and a mobile terminal, wherein the sensor is connected with the mobile terminal through a Bluetooth network;
the sensor sensors are simultaneously placed at a plurality of switch cabinets with abnormal signals, the sensors are simultaneously connected with the mobile terminal through the Bluetooth communication module, the mobile terminal processes partial discharge data from different sensors in a multi-thread mode, the partial discharge data actually measured by different sensors are displayed in different colors or other marks on the same coordinate system on the mobile terminal, and the relation among the partial discharge fault types, the discharge strength and the abnormal signals at different positions is preliminarily judged.
The sensor comprises a signal receiver, the signal receiver is connected with a variable gain amplifier to adjust the amplitude of a signal to ensure that the partial discharge signal is accurately obtained, the variable gain amplifier realizes current-voltage signal conversion through a signal conversion circuit, the signal conversion circuit is connected with a filter to realize frequency band selection, the filter is connected with an analog-to-digital converter to realize conversion of partial discharge analog quantity to a processor digital signal, and the analog-to-digital converter is connected with a Bluetooth communication module I to realize transmission of the partial discharge digital quantity to the mobile terminal;
the mobile terminal comprises a Bluetooth communication module II, the Bluetooth communication module II receives digital signals from a sensor, the Bluetooth communication module II is connected with a microprocessor to extract and classify amplitude, phase and frequency of data, the microprocessor is connected with a data storage module to store partial discharge data, and the data storage module is connected with a partial discharge map display screen to display the partial discharge data from multiple angles of phase, amplitude and frequency;
the variable gain amplifier employs an AD8330ACP chip having a 150MHz bandwidth suitable for applications requiring fully differential signal paths, low noise, accurately defined gain, and moderately low distortion. The basic gain function of the chip is linear in dB, controlled by the voltage applied at pin VDBS. The gain range is 0dB to 50dB, the corresponding control voltage is 0V to 1.5V, and the slope is 30mV/dB, as shown in FIG. 4.
The signal conversion circuit converts the current signal into a voltage signal, and is composed of an operational amplifier ADA4841-2, the maximum quiescent current of the operational amplifier is 1.5mA, the first half part of the signal conversion circuit converts the input current signal into a voltage signal, and the second half part of the circuit performs in-phase amplification or voltage following processing on the converted voltage signal and inputs the voltage signal into a filter circuit, as shown in FIG. 5.
The filter circuit is composed of operational amplifiers ADA4841-2, the filter is composed of a high pass filter and a low pass filter, the high pass filter and the low pass filter are respectively constructed by utilizing the two operational amplifiers ADA4841-2, and the high pass filter and the low pass filter are connected in series to realize the band pass function of the filter, as shown in FIG. 6.
The analog-to-digital converter adopts a 16-bit sigma-delta ADC in the microprocessor, the conversion rate of the analog-to-digital converter is up to 50ksps in a single-channel mode, single-channel signal input and differential signal input modes are supported, and data collected by the analog-to-digital converter can be automatically stored in a buffer in the microprocessor, so that the running time of a system is reduced.
The Bluetooth communication module adopts a CSR2.0 core chip, so that the Bluetooth transmission power consumption is low, the reliability is relatively stable, and the transmission speed is high. And data transparent transmission under a universal asynchronous serial communication protocol (UART) is supported. The bluetooth module has 5 pins, which are respectively a grounding pin, a receiving pin, a sending pin, a 3.3V power supply pin and a 5.0V power supply pin, as shown in fig. 7.
The sensors (ultrahigh frequency sensors or ultrasonic sensors or TEV sensors) of the same type are connected with the handheld mobile terminal at the same time, partial discharge signals tested by the sensors display partial discharge data actually measured by different sensors in different colors or other marks under the same coordinate system on the handheld mobile terminal, and the relation among the partial discharge fault type, the discharge strength and different abnormal position signals is preliminarily judged.
Claims (8)
1. A hand-held partial discharge detection device based on a Bluetooth interconnection terminal cluster is characterized by comprising a sensor and a mobile terminal;
the sensor sensors are simultaneously placed at a plurality of switch cabinets with abnormal signals, the sensors are simultaneously connected with the mobile terminal through the Bluetooth communication module, the mobile terminal processes partial discharge data from different sensors in a multi-thread mode, the partial discharge data actually measured by different sensors are displayed in different colors or other marks on the same coordinate system on the mobile terminal, and the relation among the partial discharge fault types, the discharge strength and the abnormal signals at different positions is preliminarily judged.
2. The device according to claim 1, wherein the sensor comprises a signal receiver, the signal receiver is connected to a variable gain amplifier to adjust a signal amplitude value to ensure accurate acquisition of the partial discharge signal, the variable gain amplifier realizes current-voltage signal conversion through a signal conversion circuit, the signal conversion circuit is connected to a filter to realize frequency band selection, the filter is connected to an analog-to-digital converter to realize conversion of the partial discharge analog quantity to a processor digital signal, and the analog-to-digital converter is connected to the bluetooth communication module I to realize transmission of the partial discharge digital quantity to the mobile terminal.
3. The device according to claim 1, wherein the mobile terminal comprises a bluetooth communication module II, the bluetooth communication module II receives the digital signal from the sensor, the bluetooth communication module II is connected to the microprocessor to extract and classify the amplitude, phase and frequency of the data, the microprocessor is connected to the data storage module to store the partial discharge data, and the data storage module is connected to the partial discharge map display screen to display the partial discharge data from multiple angles of phase, amplitude and frequency.
4. The device of claim 1, wherein the variable gain amplifier is an AD8330ACP chip having a bandwidth of 150MHz and a basic gain function of linear dB controlled by a voltage applied to the VDBS pin, the gain range is 0dB to 50dB, the corresponding control voltage is 0V to 1.5V, and the slope is 30 mV/dB.
5. The device according to claim 1, wherein the signal conversion circuit converts the current signal into a voltage signal, and comprises an operational amplifier ADA4841-2, the operational amplifier has a maximum quiescent current of 1.5mA, the first half of the signal conversion circuit converts the input current signal into a voltage signal, and the second half of the signal conversion circuit performs in-phase amplification or voltage following processing on the converted voltage signal and inputs the voltage signal into the filter circuit.
6. The device according to claim 1, wherein the filter circuit comprises an operational amplifier ADA4841-2, the filter comprises a high pass filter and a low pass filter, the two operational amplifiers ADA4841-2 are used to construct the high pass filter and the low pass filter, respectively, and the two filters are connected in series to realize the band pass function of the filter.
7. The device according to claim 1, wherein the ADC employs a 16-bit sigma-delta ADC inside the microprocessor, and in a single channel mode, the conversion rate of the ADC is as high as 50ksps, which supports single channel signal input and differential signal input modes, and the data collected by the ADC can be automatically stored in a buffer inside the microprocessor, thereby reducing the system running time.
8. The device of claim 1, wherein the bluetooth communication module employs a CSR2.0 core chip, so that bluetooth transmission power consumption is low, reliability is relatively stable, and transmission speed is relatively fast. And the transparent transmission of data under the universal asynchronous serial communication protocol is supported. This bluetooth module has 5 pins in total, is ground connection, receipt, transmission, 3.3V and 5.0V power pin respectively.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112505368A (en) * | 2020-12-02 | 2021-03-16 | 孙玉珍 | Single-channel multifunctional partial discharge inspection instrument and inspection method thereof |
| CN113447770A (en) * | 2021-06-01 | 2021-09-28 | 科润智能控制股份有限公司 | High-voltage circuit breaker partial discharge monitoring and early warning method |
| CN113671325A (en) * | 2021-08-18 | 2021-11-19 | 云南电网有限责任公司大理供电局 | Terminal partial discharge monitoring method and system based on high-frequency electric field change |
| CN114689998A (en) * | 2022-02-22 | 2022-07-01 | 上海格鲁布科技有限公司 | Portable dial partial discharge detection device, system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112505368A (en) * | 2020-12-02 | 2021-03-16 | 孙玉珍 | Single-channel multifunctional partial discharge inspection instrument and inspection method thereof |
| CN113447770A (en) * | 2021-06-01 | 2021-09-28 | 科润智能控制股份有限公司 | High-voltage circuit breaker partial discharge monitoring and early warning method |
| CN113671325A (en) * | 2021-08-18 | 2021-11-19 | 云南电网有限责任公司大理供电局 | Terminal partial discharge monitoring method and system based on high-frequency electric field change |
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Application publication date: 20201103 |