CN107966207B - On-load tap changer vibration signal acquisition device and analysis system - Google Patents
On-load tap changer vibration signal acquisition device and analysis system Download PDFInfo
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- CN107966207B CN107966207B CN201711492762.8A CN201711492762A CN107966207B CN 107966207 B CN107966207 B CN 107966207B CN 201711492762 A CN201711492762 A CN 201711492762A CN 107966207 B CN107966207 B CN 107966207B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
- G01H11/08—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means using piezoelectric devices
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0428—Safety, monitoring
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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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2612—Data acquisition interface
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2656—Instrumentation
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Automation & Control Theory (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention relates to a vibration signal acquisition device and an analysis system of an on-load tap-changer. The vibration signal acquisition device of the on-load tap-changer comprises a vibration sensor, a signal converter and wireless transmission equipment, wherein the vibration sensor, the signal converter and the wireless transmission equipment are sequentially connected, and the wireless transmission equipment is in wireless communication connection with signal analysis equipment; the vibration sensor collects vibration signals of the on-load tap-changer and transmits the vibration signals to the signal converter, the signal converter carries out analog-to-digital conversion on the vibration signals to obtain digital signals, and the digital signals are wirelessly transmitted to the signal analysis equipment through the wireless transmission equipment. Through wireless transmission, the wireless sensor is not limited by communication cables, no cable is required to be laid on site for collection, and the wireless sensor is convenient to use and particularly suitable for being used under the conditions of multi-sampling point requirements and severe application environments.
Description
Technical Field
The invention relates to the technical field of power equipment monitoring, in particular to a vibration signal acquisition device and an analysis system of an on-load tap-changer.
Background
The on-load tap-changer is used as the only movable part in the power transformer, and the main fault type is mechanical fault, which can damage the on-load tap-changer and the power transformer, affect the normal and safe operation of the power equipment and the power system and cause serious consequences. When the on-load tap-changer has fault hidden trouble, the vibration signal caused by the action of the contact is different from the vibration signal in the normal state; therefore, the vibration signals of the on-load tap-changer are collected, and the state characteristic information contained in the vibration signals is extracted to analyze and diagnose the running state of the on-load tap-changer, so that the fault hidden danger of the power grid can be found as soon as possible.
Vibration signals are collected in a traditional mode of mainly adopting wiring, a cable is used for connecting the vibration sensor and the processor, and the cable transmits the vibration signals collected by the vibration sensor to the processor. However, in order to obtain a more realistic, higher accuracy vibration signal of the on-load tap-changer, the sampling points and the parameters of the sampling at the vibration measurement need to be increased accordingly. If a wiring mode is used, in the acquisition process of multi-sampling-point and multi-parameter vibration signals, vibration sensors and cables which are required to be laid on site are dense and more, the layout of the cables is very troublesome and is very easy to produce errors, and the acquisition is inconvenient.
Disclosure of Invention
Based on this, it is necessary to provide an on-load tap changer vibration signal acquisition device and analysis system capable of improving the convenience of vibration signal acquisition, in order to solve the problem of inconvenient acquisition of the conventional vibration signal.
The vibration signal acquisition device of the on-load tap-changer comprises a vibration sensor, a signal converter and wireless transmission equipment, wherein the vibration sensor, the signal converter and the wireless transmission equipment are sequentially connected, and the wireless transmission equipment is in wireless communication connection with signal analysis equipment;
the vibration sensor collects vibration signals of the on-load tap-changer and transmits the vibration signals to the signal converter, the signal converter carries out analog-to-digital conversion on the vibration signals to obtain digital signals, and the digital signals are wirelessly transmitted to the signal analysis equipment through the wireless transmission equipment.
The vibration signal acquisition device of the on-load tap-changer is sequentially connected with the vibration sensor, the signal converter and the wireless transmission equipment, the signal converter converts the vibration signal acquired by the vibration sensor into a digital signal, and the wireless transmission equipment wirelessly transmits the digital signal to the signal analysis equipment; through wireless transmission, the wireless sensor is not limited by communication cables, no cable is required to be laid on site for collection, and the wireless sensor is convenient to use and particularly suitable for being used under the conditions of multi-sampling point requirements and severe application environments.
The vibration signal analysis system of the on-load tap-changer comprises signal analysis equipment and the vibration signal acquisition device of the on-load tap-changer, wherein the wireless transmission equipment is connected with the signal analysis equipment in a wireless communication mode.
According to the vibration signal analysis system of the on-load tap-changer, through wireless communication between the signal analysis equipment and the vibration signal acquisition device of the on-load tap-changer, the acquisition and transmission of vibration signals are not limited by communication cables, cables are not required to be laid on the acquisition site, the use is convenient, and the vibration signal analysis system is particularly suitable for being applied to multi-sampling point requirements and severe application environments.
Drawings
FIG. 1 is a block diagram of a vibration signal acquisition device of an on-load tap-changer according to an embodiment;
FIG. 2 is a block diagram of a vibration signal acquisition device for an on-load tap-changer according to another embodiment;
Fig. 3 is a schematic diagram of a vibration signal analysis system of an on-load tap-changer according to an embodiment.
Detailed Description
Referring to fig. 1, in an embodiment, an on-load tap-changer vibration signal acquisition apparatus is provided, which includes a vibration sensor 110, a signal converter 120 and a wireless transmission device 130, where the vibration sensor 110, the signal converter 120 and the wireless transmission device 130 are sequentially connected, and the wireless transmission device 130 is connected to a signal analysis device in a wireless communication manner.
The vibration sensor 110 collects the vibration signal of the on-load tap-changer and transmits the vibration signal to the signal converter 120, and the signal converter 120 performs analog-to-digital conversion on the vibration signal to obtain a digital signal and wirelessly transmits the digital signal to the signal analysis device through the wireless transmission device 130.
Specifically, the vibration sensor 110 is fixedly disposed inside the on-load tap-changer to sense vibration of the on-load tap-changer, and converts a physical quantity of the vibration into a vibration signal in the form of an electrical signal, for example, the vibration signal acquisition device of the entire on-load tap-changer may be fixedly disposed inside the on-load tap-changer; the signal analysis device is arranged outside the on-load tap-changer. The vibration signal is analog in signal type, and is converted into a digital signal by the signal converter 120, so that the wireless transmission device 130 can perform wireless transmission.
The vibration signal acquisition device of the on-load tap-changer is sequentially connected by adopting the vibration sensor 110, the signal converter 120 and the wireless transmission device 130, the signal converter 120 converts the vibration signal acquired by the vibration sensor 110 into a digital signal, and the wireless transmission device 130 wirelessly transmits the digital signal to the signal analysis device; through wireless transmission, the wireless sensor is not limited by communication cables, no cable is required to be laid on site for collection, and the wireless sensor is convenient to use and particularly suitable for being used under the conditions of multi-sampling point requirements and severe application environments.
In one embodiment, the vibration sensor 110 is a piezoelectric acceleration sensor. The piezoelectric acceleration sensor has high sensitivity and good acquisition effect. Specifically, in the present embodiment, a piezoelectric acceleration sensor of the LC0151T type incorporating a micro-amplifier may be employed.
In one embodiment, referring to fig. 2, the signal converter 120 includes a signal adjustment circuit 121 and an analog-to-digital converter 122, the signal adjustment circuit 121 is connected to the vibration sensor 110 and the analog-to-digital converter 122, and the analog-to-digital converter 122 is connected to the wireless transmission device 130.
The signal adjustment circuit 121 pre-processes the vibration signal output from the vibration sensor 110 and outputs the pre-processed signal to the analog-to-digital converter 122, and the analog-to-digital converter 122 performs analog-to-digital conversion on the pre-processed signal to obtain a digital signal.
The preprocessing may include filtering, amplifying, voltage regulating, etc. By connecting the vibration sensor 110 and the analog-to-digital converter 122 with the signal adjustment circuit 121, the vibration signal is preprocessed before analog-to-digital conversion, and the vibration signal is improved.
In one embodiment, with continued reference to fig. 2, the signal conditioning circuit 121 includes a PGA (programmable gain amplifier) 1211 and a differential voltage conditioning circuit 1212, the PGA 1211 being connected to the vibration sensor 110 and the differential voltage conditioning circuit 1212, the differential voltage conditioning circuit 1212 being connected to the analog-to-digital converter 122.
The PGA 1211 performs filtering amplification processing on the vibration signal output from the vibration sensor 110, and outputs the filtered and amplified signal to the differential voltage adjustment circuit 1212, and the differential voltage adjustment circuit 1212 performs voltage adjustment on the filtered and amplified signal and differentially outputs the voltage-adjusted signal to the analog-to-digital converter 122. Wherein the differential output is a signal that converts a single-ended input signal into a double-ended differential output signal.
Since the reference voltage of the output signal of the PGA 1211 is typically 0V (volt), and the voltage amplitude of the input signal of the post-stage analog-to-digital converter 122 is typically in the range of 0-5V, the reference voltage needs to be adjusted. Specifically, the reference voltage of the differential voltage adjustment circuit 1212 may be set to 2.5V so that the signal output to the analog-to-digital converter 122 fluctuates up and down within the range of the input signal voltage amplitude. Since the PGA 1211 may be controlled using ARM (processor) programming, the use of keys and switches may be reduced by using the PGA 1211.
The PGA 1211 may be composed of an electronic switching chip, an operational amplifier, and a resistive element, and the gain of the operational amplifier is controlled by controlling the electronic switching chip to be turned on or off. Specifically, to meet the requirements of the actual operating voltage, the input signal voltage range, the gain-bandwidth product, the slew rate, the common-mode rejection ratio, etc., the operational amplifier may employ a TLE2072 chip.
Specifically, the differential voltage adjustment circuit 1212 may include a voltage adjustment circuit and a differential circuit, the voltage adjustment circuit connecting the PGA 1211 and the differential circuit for voltage adjustment; the differential circuit is connected to the analog-to-digital converter 122 for differential output.
In one embodiment, with continued reference to FIG. 2, the signal conditioning circuit 121 further includes a sensor interface circuit 1213, and the PGA 1211 is coupled to the vibration sensor 110 via the sensor interface circuit 1213.
The sensor interface circuit 1213 is used to connect to multiple types of vibration sensors. By arranging the sensor interface circuit 1213, the access of different types of vibration sensors can be realized, and the vibration sensor is suitable for different vibration signal acquisition occasions.
In one embodiment, analog-to-digital converter 122 is an A/D conversion chip. The traditional device for collecting the vibration signals generally directly adopts the A/D conversion function of a processor, realizes the A/D conversion of 10 bits and 12 bits, has lower sampling resolution and larger sampling error, and increases the difficulty of subsequent signal processing. By adopting an independent A/D conversion chip, the purpose of high-precision signal sampling can be achieved.
Specifically, in the embodiment, an a/D conversion chip of AK5385B type is adopted, so that the sampling precision and resolution are higher, and high-precision acquisition of vibration signals is realized.
In one embodiment, the wireless transmission device 130 includes a processor 131 and a wireless transmission module 132, the processor 131 being coupled to the signal converter 120 and the wireless transmission module 132, the wireless transmission module 132 being coupled in wireless communication with the signal analysis device. The processor 131 controls wireless transmission of the wireless transmission module 132, which is convenient to use.
Specifically, the processor 131 may be provided with a URAT (Universal Asynchronous Receiver/Transmitter universal asynchronous receiver Transmitter) serial port, which may implement expansion of external functions.
The wireless transmission module 132 may be a WIFI module. The WIFI module is fast in connection response, stable in performance, low in power consumption, small in size and light in weight, so that the size of the vibration signal acquisition device of the on-load tap-changer can be reduced, and the acquisition efficiency is improved.
In one embodiment, the processor 131 includes an ARM chip with an SDIO (Secure Digital Input and Output secure digital input output) interface, the wireless transmission module 132 is an SDIO-WIFI module, and the ARM chip is connected to the SDIO-WIFI module through the SDIO interface.
The SDIO-WIFI module is an embedded module which accords with the WIFI wireless network standard and is based on an SDIO interface, and the transmission rate is high and the price is low. Through adopting ARM chip to connect SDIO-WIFI module through SDIO interface, can improve vibration signal's collection efficiency, and reduce cost. In this embodiment, the ARM chip may be a chip of STM32F103VCT6 type based on Cortex-M3 kernel.
In one embodiment, an on-load tap-changer vibration signal analysis system is provided, which comprises a signal analysis device and the on-load tap-changer vibration signal acquisition device, wherein the wireless transmission device 130 is connected with the signal analysis device in a wireless communication manner.
After the signal analysis device receives the digital signal wirelessly transmitted by the wireless transmission device 130, the digital signal can be subjected to feature extraction to obtain operation state information, so that a worker can analyze the operation state of the on-load tap-changer according to the operation state information. In particular, the signal analysis device may also display and store digital signals and/or operating state information.
According to the vibration signal analysis system of the on-load tap-changer, through wireless communication between the signal analysis equipment and the vibration signal acquisition device of the on-load tap-changer, the acquisition and transmission of vibration signals are not limited by communication cables, cables are not required to be laid on the acquisition site, the use is convenient, and the vibration signal analysis system is particularly suitable for being applied to multi-sampling point requirements and severe application environments.
Specifically, as shown in fig. 3, the signal analysis device may be a computer.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (9)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711492762.8A CN107966207B (en) | 2017-12-30 | 2017-12-30 | On-load tap changer vibration signal acquisition device and analysis system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711492762.8A CN107966207B (en) | 2017-12-30 | 2017-12-30 | On-load tap changer vibration signal acquisition device and analysis system |
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| CN107966207A CN107966207A (en) | 2018-04-27 |
| CN107966207B true CN107966207B (en) | 2024-11-19 |
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| CN201711492762.8A Active CN107966207B (en) | 2017-12-30 | 2017-12-30 | On-load tap changer vibration signal acquisition device and analysis system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110274921B (en) * | 2019-01-17 | 2022-08-05 | 武汉大学 | An all-digital two-dimensional coincident Doppler broadening system |
| CN110595762A (en) * | 2019-10-29 | 2019-12-20 | 广州供电局有限公司 | Transformer on-load tap changer diagnosis system and transformer on-load tap changer diagnosis method |
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| CN101666710A (en) * | 2009-09-23 | 2010-03-10 | 河海大学 | Fault diagnosis system of transmission part of on-load tap-changer and diagnostic method thereof |
| CN101709995A (en) * | 2009-12-24 | 2010-05-19 | 浙江大学 | Methods for vibration online monitoring and fault diagnosis of power transformer |
| CN207832309U (en) * | 2017-12-30 | 2018-09-07 | 广州供电局有限公司 | Load ratio bridging switch vibration signal acquisition device and analysis system |
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| JP2009115538A (en) * | 2007-11-05 | 2009-05-28 | Fuji Electric Systems Co Ltd | Vibration monitoring device with wireless sensor |
| CN202351398U (en) * | 2011-11-23 | 2012-07-25 | 厦门红相电力设备股份有限公司 | Fault diagnosis system for load tap changer of transformer |
| CN203405548U (en) * | 2013-07-22 | 2014-01-22 | 江苏骏龙电力科技股份有限公司 | An online monitoring apparatus of a transformer on-load tap changer |
| CN106199397A (en) * | 2015-04-29 | 2016-12-07 | 国家电网公司 | A kind of load ratio bridging switch mechanical breakdown on-line monitoring method |
| CN205809250U (en) * | 2016-07-19 | 2016-12-14 | 广东电网有限责任公司佛山供电局 | On-load tap-changer of transformer vibration characteristics detecting system |
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- 2017-12-30 CN CN201711492762.8A patent/CN107966207B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666710A (en) * | 2009-09-23 | 2010-03-10 | 河海大学 | Fault diagnosis system of transmission part of on-load tap-changer and diagnostic method thereof |
| CN101709995A (en) * | 2009-12-24 | 2010-05-19 | 浙江大学 | Methods for vibration online monitoring and fault diagnosis of power transformer |
| CN207832309U (en) * | 2017-12-30 | 2018-09-07 | 广州供电局有限公司 | Load ratio bridging switch vibration signal acquisition device and analysis system |
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| CN107966207A (en) | 2018-04-27 |
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Effective date of registration: 20200924 Address after: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Applicant after: Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd. Address before: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Applicant before: GUANGZHOU POWER SUPPLY Co.,Ltd. |
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