CN203444957U - Transformer self-adaptation active noise reduction device - Google Patents
Transformer self-adaptation active noise reduction device Download PDFInfo
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- CN203444957U CN203444957U CN201320588923.4U CN201320588923U CN203444957U CN 203444957 U CN203444957 U CN 203444957U CN 201320588923 U CN201320588923 U CN 201320588923U CN 203444957 U CN203444957 U CN 203444957U
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Abstract
The utility model discloses a transformer self-adaptation active noise reduction device. The transformer self-adaptation active noise reduction device is characterized by comprising a noise receiving module (1), a self-adaptation noise reduction controller (2), a secondary sound source generating module (3) and a secondary sound wave transmitter module (4) which are sequentially connected to one another, wherein the noise receiving module (1) comprises multiple sonic wave detection sensors (5); the self-adaptation noise reduction controller (2) comprises a self-adaptation filter (6) and a self-adaptation filtering algorithm (7); the secondary sound source generating module (3) comprises a digital-analog converter (8) and an operational amplifier (9); the secondary sound wave transmitter module (4) comprises multiple power amplifiers (10); the noise receiving module (1) is used for obtaining a noise source signal, then the self-adaptation noise reduction controller (2) is used for processing the noise source signal, the secondary sound source generating module (3) is used for controlling the secondary sound wave transmitter module (4) to generate sound wave signals to superpose with the sound waves of the noise source, wherein the amplitude and the frequency of the sound wave signals are same as those of sound waves of the noise source, and the phase of the sound wave signals is opposite to those of the sound waves of the noise source, so that a quiet zone is generated outside the range of a transformer area, and the noise reduction purpose is realized.
Description
Technical field
The utility model relates to a kind of transformer self-adaptive active noise reducing device, belongs to power transformer active noise reduction field.
Background technology
In recent years, along with increasing sharply of urban distribution network load, part transformer station by the addressing of having at the intensive urban central zone of electric load.The normal live and work of noise on human that transformer is produced by it when moving has continuously caused very large impact, it is more and more that transformer noise pollutes caused complaint, the noise of transformer is also subject to people's attention day by day, and how effectively eliminating and suppressing noise has become a popular research topic.
More external large-scale power transformer manufacturing companies and correlative study mechanism were studied transformer noise problem with regard to starting the twenties in 20th century, and research direction is mainly concerned with transformer noise and vibration mechanism, acoustic characteristic, noise-reduction method and measure etc.Each transformer manufacturer has all done a large amount of test and studies at aspects such as production technology, use materials for reducing transformer noise and cost.The domestic research to transformer noise aspect relatively lags behind in abroad, mainly concentrates on transformer noise mechanism and control, and qualitative analysis and practical experience are summed up upper, has proposed from many aspects to reduce the method for transformer noise.Along with the development of measuring technology and computer-assisted analysis, domestic some scholar analyzes from test transformer noise rumble spectrum aspect, utilizes in addition finite element technique to analyze transformer noise mechanism.The correlative study that adopts adaptive noise cancellation technology to suppress transformer noise is at present less, is for production technology mostly, uses the aspects such as material to carry out the inhibition of transformer noise.
Transformer noise mainly contains two noise sources: being the noise that transformer body produces on the one hand, is mainly the noise of the generation of vibrations such as transformer core, winding, magnetic screen; The noise of transformer auxiliary device on the other hand, the noise causing as transformer cooling device (fan or water pump).From signal, originate, the cyclic variation of voltage and current causes the cycle movement of transformer core and related components, thereby causes that mechanical oscillation and air vibration produce noise, and the size of noise depends on the amplitude that expands and shrink.Ideally, if the frequency of alternating current is 50Hz, the frequency of noise will be 100Hz so.But under actual conditions, noise is to using ideal frequency as fundamental frequency, and by the humorous wave component of fundamental frequency multiple, and contribute energy differs.Transformer noise is to belong to stationary noise in the situation that environment is constant, and the frequency of noise is also absolutely convergent.
Adaptive noise cancellation technology is a kind of signal processing technology that can eliminate background noise impact.Application self-adapting noise cancellation technique, the in the situation that of unknown external interference source feature, constantly variation of pipeline, background noise and measurand signal similar, effectively eliminate the interference of outside noise, so it has good application prospect.
Summary of the invention
The purpose of this utility model is to provide a kind of transformer self-adaptive active noise reducing device for the deficiencies in the prior art, be characterized in the in the situation that of unknown external interference source feature, constantly variation of pipeline, background noise and measurand signal similar, the noise of offsetting or reduce transformer and auxiliary device generation thereof, reduces the stimulation to human body sense of hearing sense organ.
The purpose of this utility model is realized by following technical measures
Transformer self-adaptive active noise reducing device is connected to form by noise receiver module, adaptive noise reduction controller, secondary sound source generation module and secondary acoustic emission module successively; Noise receiver module is comprised of a plurality of acoustic sounding transducers; Adaptive noise reduction controller comprises sef-adapting filter and adaptive filter algorithm; Secondary sound source generation module comprises digital to analog converter and operational amplifier; Secondary acoustic emission module is comprised of a plurality of power amplifiers; Noise receiver module obtains noise source signal, by adaptive-filtering controller, the noise obtaining is processed again, by the secondary acoustic emission module of secondary sound source generation module controls, produce identical with noise waves amplitude, frequency is identical, the acoustic signals of single spin-echo and the stack of the sound wave of noise source, thereby in transformer regional extent, produce " No Tooting Area " outward, realize the object of noise reduction.
Described adaptive noise reduction controller is completed the time domain analysis of noise signal and frequency-domain analysis jointly by sef-adapting filter and adaptive filter algorithm, obtain temporal signatures and the frequency domain character of noise signal, and the generation digital noise reduction signal mutual corresponding with noise signal, sef-adapting filter and adaptive filter algorithm cooperatively interact and make de-noising signal have adaptivity, can follow the trail of at any time frequency, phase place, the amplitude characteristic of noise, realize lasting and stable noise reduction.
The utlity model has following advantage:
1, the noise can real-time tracing transformer producing, and the generation digital noise reduction signal mutual corresponding with noise signal.
2, by the secondary acoustic emission module of secondary sound source generation module controls, produce identical with noise waves amplitude, frequency is identical, the acoustic signals of single spin-echo and the stack of the sound wave of noise source, effectively eliminate or reduce the noise that transformer produces, and reaches good noise reduction.
3, the utility model consists of four functional modules, simple in structure, cheap for manufacturing cost, has good economic benefit.
Accompanying drawing explanation
Fig. 1 is a kind of transformer self-adaptive active noise reducing device schematic diagram described in the utility model.
1 is noise receiver module, and 2 is adaptive noise reduction controller, and 3 is secondary sound source generation module, and 4 is secondary acoustic emission module, 5 is acoustic sounding transducer, and 6 is sef-adapting filter, and 7 is adaptive filter algorithm, 8 is digital to analog converter, and 9 is operational amplifier, and 10 is power amplifier.
Fig. 2 is a kind of execution mode of a kind of transformer self-adaptive active noise reducing device described in the utility model.
2 is adaptive noise reduction controller, and 3 is secondary sound source generation module, and 5 is acoustic sounding transducer, and 10 is power amplifier.
Embodiment
Below by embodiment, the utility model is specifically described, can not be interpreted as the restriction to the utility model protection range,
Embodiment
Transformer self-adaptive active noise reducing device, is characterized in that this device is connected to form by noise receiver module 1, adaptive noise reduction controller 2, secondary sound source generation module 3 and secondary acoustic emission module 4 successively; Noise receiver module 1 is comprised of a plurality of acoustic sounding transducers 5; Adaptive noise reduction controller 2 comprises sef-adapting filter 6 and adaptive filter algorithm 7; Secondary sound source generation module 3 comprises digital to analog converter 8 and operational amplifier 9; Secondary acoustic emission module 4 is comprised of a plurality of power amplifiers 10; Noise receiver module 1 obtains noise source signal, by 2 pairs of noises that obtain of adaptive-filtering controller, processed again, by secondary sound source generation module 3, controlling secondary acoustic emission module 4 produces identical with noise waves amplitude, frequency is identical, the acoustic signals of single spin-echo and the stack of the sound wave of noise source, thereby in transformer regional extent, produce " No Tooting Area " outward, realize the object of noise reduction.
According to the actual conditions of transformer running environment in industry spot, noise source mainly contains two sources: transformer itself and its auxiliary device.For reaching best noise reduction, need guarantee that noise receiver module 1 can receive the noise sound wave of propagating to different directions, and the sound wave that secondary acoustic emission module 4 is sent block noise sound wave trajectory completely.Thereby in commission, need to, in transformer and auxiliary device different azimuth around thereof, the described transformer self-adaptive active noise reducing device of many groups be set.In the present embodiment, suppose noise source be one with the transformer of cooling fan, its noise type is mainly electric and magnetic oscillation and mechanical oscillation.
Described noise receiver module 1 is placed on transformer acoustic sounding transducer 5 around by distribution and forms, the acoustic sounding transducer 5 that is positioned at different azimuth obtains the noise of transformer and fan generation thereof from different perspectives, and by signal cable, sends it to adaptive noise reduction controller 2.When application many groups acoustic sounding transducer 5 and power amplifier 10, acoustic sounding transducer 5 in noise receiver module 1 is corresponding one by one with the power amplifier 10 in secondary acoustic emission module 2, wherein acoustic sounding transducer 5 is for receiving current location noise signal, and power amplifier 10 is used for offsetting the de-noising signal of noise to noise source direction transmitting.
Described adaptive noise reduction controller 2 obtains after noise signal from acoustic sounding transducer 5, by sef-adapting filter 6 and adaptive filter algorithm 7, jointly completed the time domain analysis of noise signal and frequency-domain analysis, obtain temporal signatures and the frequency domain character of noise signal, and the generation digital noise reduction signal mutual corresponding with noise signal, sef-adapting filter 6 and adaptive filter algorithm 7 cooperatively interact and make de-noising signal have adaptivity, can follow the trail of at any time frequency, phase place, the amplitude characteristic of noise, realize lasting and stable noise reduction.Adaptive noise reduction controller 2 is miniature computing systems, and its hardware completes reception, the storage of data according to software program, and realizes computing and the signal processing function of sef-adapting filter 6 and adaptive filter algorithm 7, and can export the digital signal for noise reduction.
Described secondary sound source generation module 3 is by digital to analog converter 8, the digital noise reduction signal of adaptive noise reduction controller 2 outputs is converted to analog signal identical with noise signal frequencies, single spin-echo, then by operational amplifier 9, the amplitude of analog signal and noise signal is matched.Between inner each unit of secondary sound source generation module 3, and be connected to communication connection between adaptive noise reduction controller 2 and secondary sound source generation module 3.
Described acoustic emission module 4 receives the final de-noising signal being produced by secondary sound source generation module 3, by signal cable, output to power amplifier 10, the opposite direction that enters acoustic sounding transducer 5 to noise signal through power amplifier 10 is sent, mutually superpose and offset with the noise sound wave of current location, thereby produce " No Tooting Area " in this region certain limit.
The described transformer self-adaptive active noise reducing device of many groups around forms and coordinates at transformer and auxiliary device thereof, can outside this transformer, form continuous " No Tooting Area ", and block noise sound wave, to the path of outside spatial, reaches the object of noise reduction.
Claims (2)
1. a transformer self-adaptive active noise reducing device, is characterized in that this device is connected to form by noise receiver module (1), adaptive noise reduction controller (2), secondary sound source generation module (3) and secondary acoustic emission module (4) successively; Noise receiver module (1) is comprised of a plurality of acoustic sounding transducers (5); Adaptive noise reduction controller (2) comprises sef-adapting filter (6) and adaptive filter algorithm (7); Secondary sound source generation module (3) comprises digital to analog converter (8) and operational amplifier (9); Secondary acoustic emission module (4) is comprised of a plurality of power amplifiers (10); Noise receiver module (1) obtains noise source signal, by adaptive-filtering controller (2), the noise obtaining is processed again, by secondary sound source generation module (3), controlling secondary acoustic emission module (4) produces identical with noise waves amplitude, frequency is identical, the acoustic signals of single spin-echo and the stack of the sound wave of noise source, thereby in transformer regional extent, produce " No Tooting Area " outward, realize the object of noise reduction.
2. transformer self-adaptive active noise reducing device as claimed in claim 1, it is characterized in that described adaptive noise reduction controller (2) is completed the time domain analysis of noise signal and frequency-domain analysis jointly by sef-adapting filter (6) and adaptive filter algorithm (7), obtain temporal signatures and the frequency domain character of noise signal, and the generation digital noise reduction signal mutual corresponding with noise signal, sef-adapting filter (6) and adaptive filter algorithm (7) cooperatively interact and make de-noising signal have adaptivity, can follow the trail of at any time the frequency of noise, phase place, amplitude characteristic, realize lasting and stable noise reduction.
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| CN201320588923.4U CN203444957U (en) | 2013-09-23 | 2013-09-23 | Transformer self-adaptation active noise reduction device |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104538017A (en) * | 2014-12-17 | 2015-04-22 | 武汉理工大学 | Transformer substation noise device based on active control |
| CN104916418A (en) * | 2015-06-25 | 2015-09-16 | 国网山东省电力公司莱芜供电公司 | Active noise control system and working method of power transformer |
| CN105529022A (en) * | 2015-12-18 | 2016-04-27 | 东华大学 | Self-adaptive combined integration filtering apparatus and noise control system and method |
| CN105575381A (en) * | 2015-10-28 | 2016-05-11 | 长沙学院 | Train air-cooled current transformer noise active control method |
| CN106504761A (en) * | 2016-09-26 | 2017-03-15 | 李志宁 | A kind of intelligent noise of orientable noise reduction eliminates system |
| CN107843792A (en) * | 2017-11-09 | 2018-03-27 | 南通盛洋电气有限公司 | The real-time apparatus for evaluating of transformer based on noise and temperature |
| CN108413251A (en) * | 2018-02-07 | 2018-08-17 | 广州莱仑特种装备有限公司 | A kind of self feed back denoising device for pipe network natural gas pressure regulating |
| CN108591129A (en) * | 2018-04-02 | 2018-09-28 | 郑州云海信息技术有限公司 | A kind of adaptive server active noise reduction system and noise-reduction method |
| CN109036810A (en) * | 2017-04-18 | 2018-12-18 | 江西明正变电设备有限公司 | A kind of transformer active noise denoising device and control method |
| CN110056495A (en) * | 2018-12-25 | 2019-07-26 | 浙江零跑科技有限公司 | New energy vehicle electric vacuum pump active noise reducing device |
| CN111063528A (en) * | 2019-11-25 | 2020-04-24 | 深圳供电局有限公司 | Active noise reduction equipment of transformer and transformer noise on-line monitoring system |
| CN111069009A (en) * | 2019-12-30 | 2020-04-28 | 哈尔滨工程大学 | Intelligent active control method for acoustic characteristics of ship |
| CN111091806A (en) * | 2019-12-02 | 2020-05-01 | 广东博智林机器人有限公司 | Motor noise reduction device, motor device and motor noise reduction method |
| CN111323377A (en) * | 2020-04-16 | 2020-06-23 | 中国科学院电工研究所 | Photoacoustic spectroscopy device with active noise reduction function |
| CN111947926A (en) * | 2020-07-10 | 2020-11-17 | 西安工程大学 | Intelligent sliding bearing self-adaptive active noise reduction device and noise reduction method |
| CN113140206A (en) * | 2021-03-09 | 2021-07-20 | 江苏大学 | Active noise reduction strategy and system for fixed acoustic characteristic noise source |
| CN113539226A (en) * | 2021-06-02 | 2021-10-22 | 国网河北省电力有限公司电力科学研究院 | Active noise reduction control method for transformer substation |
-
2013
- 2013-09-23 CN CN201320588923.4U patent/CN203444957U/en not_active Expired - Lifetime
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104538017A (en) * | 2014-12-17 | 2015-04-22 | 武汉理工大学 | Transformer substation noise device based on active control |
| CN104916418A (en) * | 2015-06-25 | 2015-09-16 | 国网山东省电力公司莱芜供电公司 | Active noise control system and working method of power transformer |
| CN105575381A (en) * | 2015-10-28 | 2016-05-11 | 长沙学院 | Train air-cooled current transformer noise active control method |
| CN105529022A (en) * | 2015-12-18 | 2016-04-27 | 东华大学 | Self-adaptive combined integration filtering apparatus and noise control system and method |
| CN106504761A (en) * | 2016-09-26 | 2017-03-15 | 李志宁 | A kind of intelligent noise of orientable noise reduction eliminates system |
| CN109036810A (en) * | 2017-04-18 | 2018-12-18 | 江西明正变电设备有限公司 | A kind of transformer active noise denoising device and control method |
| CN109036810B (en) * | 2017-04-18 | 2020-12-29 | 江西明正变电设备有限公司 | Transformer active noise reduction device and control method |
| CN107843792A (en) * | 2017-11-09 | 2018-03-27 | 南通盛洋电气有限公司 | The real-time apparatus for evaluating of transformer based on noise and temperature |
| CN108413251A (en) * | 2018-02-07 | 2018-08-17 | 广州莱仑特种装备有限公司 | A kind of self feed back denoising device for pipe network natural gas pressure regulating |
| CN108591129A (en) * | 2018-04-02 | 2018-09-28 | 郑州云海信息技术有限公司 | A kind of adaptive server active noise reduction system and noise-reduction method |
| CN110056495A (en) * | 2018-12-25 | 2019-07-26 | 浙江零跑科技有限公司 | New energy vehicle electric vacuum pump active noise reducing device |
| CN111063528A (en) * | 2019-11-25 | 2020-04-24 | 深圳供电局有限公司 | Active noise reduction equipment of transformer and transformer noise on-line monitoring system |
| CN111063528B (en) * | 2019-11-25 | 2021-08-31 | 深圳供电局有限公司 | Active noise reduction equipment of transformer and transformer noise on-line monitoring system |
| CN111091806A (en) * | 2019-12-02 | 2020-05-01 | 广东博智林机器人有限公司 | Motor noise reduction device, motor device and motor noise reduction method |
| CN111069009A (en) * | 2019-12-30 | 2020-04-28 | 哈尔滨工程大学 | Intelligent active control method for acoustic characteristics of ship |
| CN111323377A (en) * | 2020-04-16 | 2020-06-23 | 中国科学院电工研究所 | Photoacoustic spectroscopy device with active noise reduction function |
| CN111947926A (en) * | 2020-07-10 | 2020-11-17 | 西安工程大学 | Intelligent sliding bearing self-adaptive active noise reduction device and noise reduction method |
| CN111947926B (en) * | 2020-07-10 | 2022-07-15 | 西安工程大学 | Intelligent sliding bearing self-adaptive active noise reduction device and noise reduction method |
| CN113140206A (en) * | 2021-03-09 | 2021-07-20 | 江苏大学 | Active noise reduction strategy and system for fixed acoustic characteristic noise source |
| CN113539226A (en) * | 2021-06-02 | 2021-10-22 | 国网河北省电力有限公司电力科学研究院 | Active noise reduction control method for transformer substation |
| CN113539226B (en) * | 2021-06-02 | 2022-08-02 | 国网河北省电力有限公司电力科学研究院 | Active noise reduction control method for transformer substation |
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