CN201886119U - Rotary diode fault detection system based on microcomputer excitation adjuster - Google Patents
Rotary diode fault detection system based on microcomputer excitation adjuster Download PDFInfo
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- CN201886119U CN201886119U CN 201020625998 CN201020625998U CN201886119U CN 201886119 U CN201886119 U CN 201886119U CN 201020625998 CN201020625998 CN 201020625998 CN 201020625998 U CN201020625998 U CN 201020625998U CN 201886119 U CN201886119 U CN 201886119U
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Abstract
The utility model discloses a rotary diode fault detection system based on a microcomputer excitation adjuster, which comprises an isolation amplifier, an analog signal input module, an A/D (analog/digital) conversion module, a digital signal processing module and a warning signal output module, wherein the analog signal input module, the A/D conversion module, the digital signal processing module and the warning signal output module are all integrated in the microcomputer excitation adjuster. Exciting current of a brushless exciter stator winding of the rotary diode fault detection system is subjected to isolation amplification prior to being converted into digital quantity by the A/D conversion module, and is inputted into the digital signal processing module for calculation, fault analysis and comparison, faults of a rotary diode are determined according to intensity and waveform change characteristics of harmonic current in the brushless exciter stator winding so as to realize artificial intelligent fault detection for rotary diodes, and accordingly reliability is high and stability is fine.
Description
Technical field
The utility model belongs to automation field, is specifically related to a kind of rotating diode fault detection system based on microcomputer excitation regulator.
Background technology
No-brush synchronous generator mainly is made up of main generator, brushless exciter, rotating diode.Main generator rotor, exciter rotor and rotating diode all are contained in rotation together on the same axle.The brushless exciter magnetic pole is fixed on the stator inboard, and stator winding is connected with static excitation regulating device exciting current output.When the no-brush synchronous generator rotary work, the static excitation regulating device carries exciting current to make brushless exciter produce magnetic field to the brushless exciter stator winding, brushless excitation machine rotor cutting magnetic induction line produces three-phase alternating-current supply, after the rotating diode rectification, be transported in the middle of the coaxial synchronous generator rotor loop, Generator's Rotor Circuit produces rotating magnetic field under the drive of prime mover, and the main generator unit stator cutting magnetic induction line sends electric energy.
Rotating diode in the no-brush synchronous generator is an of paramount importance link in the brushless excitation system, must guarantee that it is operated in normal condition.In case rotating diode breaks down, brushless excitation system needs and can in time detect, and fault type is made right judgement.
In the prior art, normally, as shown in Figure 1, between the AC exciter magnetic pole of the stator, detecting coil is installed for brushless exciter sets a cover rotating diode failure detector.The rotating diode failure detector of configuration carries out real time monitoring and provides corresponding signal indication exciter rotating diode and fuse.This device utilizes electromagnetic induction principle to carry out fault judgement.When rotating diode has electric current to flow through and during inswept detection probe, then detection probe will obtain pulse voltage of reaction; If the fuse in rotating diode loop or diode fusing, then detection probe can not obtain pulse voltage of reaction, and device just provides corresponding abnormal signal.In actual applications, adopt the rotating diode failure detector of interpolar detecting coil, the installation and processing difficulty also can cause the loosening dislocation of detecting coil in transportation, and the signal that obtains from the interpolar detecting coil a little less than.
Summary of the invention
The utility model provides a kind of rotating diode fault detection system based on microcomputer excitation regulator, and its reliability height, stability are strong, can accurately judge identification rotating diode whether fault and fault type thereof.
A kind of rotating diode fault detection system based on microcomputer excitation regulator comprises:
Isolated amplifier is used for the amplification of exciting current signal is obtained the amplified DC voltage signal;
The simulating signal load module is used to receive the amplified DC voltage signal and it is adjusted in the conversion range of setting, the simulating signal after adjusted;
The A/D modular converter is used to receive the simulating signal after the adjusting and is converted into digital signal;
Digital signal processing module is used for receiving digital signals and it is calculated, relatively and analyze;
And the alerting signal output module, be used for alerting signal is exported;
Wherein, described simulating signal load module, A/D modular converter, digital signal processing module and alerting signal output module all are integrated in the described microcomputer excitation regulator.
Alternatively, described digital signal processing module is selected dsp chip for use.
In the synchronous generator rotor loop, when rotating diode breaks down, the size and the waveform of the armature supply of its brushless excitation machine rotor output all change, cause the brushless exciter rotor field thus changes thereupon, and in the brushless exciter stator winding, respond to a series of harmonic currents, this harmonic current can reflect the ruuning situation of rotating diode in the Generator's Rotor Circuit.
In the utility model, the exciting current of brushless exciter stator winding is by changing into behind the digital quantity in the supplied with digital signal processing module through the A/D modular converter after isolate amplifying, digital signal processing module is analyzed the input digit amount through fast fourier transform, according to the size and the wave form varies feature of the harmonic current in the brushless exciter stator winding, judge the fault of rotating diode.Therefore, the utility model adopts artificial intelligence diagnosis's technology that exciting current is analyzed, and diagnosis can accurately be discerned fault, and not be subjected to the restriction of fault type.
Compared with prior art, the utlity model has following beneficial technical effects:
(1) adopts the artificial intelligence recognition technology to judge the rotating diode fault, do not needed to set separately special-purpose rotating diode failure detector, also saved the work of design, installation and maintenance detecting coil simultaneously;
(2) be convenient to the collection in worksite signal data, and signal is stronger, the rotor fault quantity of information can accurately be provided;
(3), carry out Intelligent Recognition, reliability height, good stability according to the generator operation parameter.
Description of drawings
Fig. 1 is the synoptic diagram of rotating diode failure detector in the prior art.
Fig. 2 is a rotating diode fault detection system synoptic diagram of the present utility model.
Fig. 3 carries out the process flow diagram of fault judgement for adopting rotating diode fault detection system of the present utility model.
Embodiment
Describe the utility model in detail below in conjunction with embodiment and accompanying drawing, but the utility model is not limited in this.
As shown in Figure 2, a kind of rotating diode fault detection system based on microcomputer excitation regulator, comprise: isolated amplifier, simulating signal load module, A/D modular converter, digital signal processing module and alerting signal output module, wherein, simulating signal load module, A/D modular converter, digital signal processing module and alerting signal output module all are integrated in the microcomputer excitation regulator, and its digital signal processing module adopts dsp chip.
In the no-brush synchronous generator of being made up of main generator, brushless exciter, rotating diode etc., main generator rotor, exciter rotor and rotating diode all are contained in rotation together on the same axle.The brushless exciter magnetic pole is fixed on the stator inboard, and stator winding is connected with static excitation regulating device exciting current output.
When no-brush synchronous generator rotation startup work, behind the field power supply process rectifier rectification of static excitation regulating device with the outside input, carry exciting current to make brushless exciter produce the magnetic field operate as normal to the brushless exciter stator winding.The static excitation regulating device is by gathering generator CT current signal and generator PT voltage signal, calculate relatively back output pulse signal, this signal after the pulse amplifier amplifies to rectifier conducting control, promptly the output exciting current is intervened, reach the purpose of control synchronous generator set end voltage and power.Excitation controller sends and disconnects the degaussing switch order when unit breaks down, thereby the power supply of fast shut-off brushless exciter reaches the effect that demagnetization is shut down.
This detection system collects exciting current in the brushless exciter stator winding with shunt, and (0～75mV) outputs to isolated amplifier, amplifies the back through signal and exports the amplified DC voltage signal from isolated amplifier; This amplified DC voltage signal through the simulating signal load module be adjusted to setting conversion range (in the direct current 0～5V), the simulating signal after adjusted; Simulating signal after the adjusting is converted to digital signal through the A/D modular converter; Digital signal processing module carries out fast fourier transform to the digital signal of input, and calculate, comparison and fault analysis, finish measurement to brushless exciter stator excitation current harmonic content and its exciting current mean value relation; And by the alerting signal output module alerting signal is exported according to the different faults type.
The output alarm fault is divided into: 1. rotating diode open circuit, 2. rotating diode short circuit.Identification to the rotating diode fault type is by detecting relation (the exciting current harmonic content coefficient I of exciter excitation current harmonic content and exciter excitation current average
r) realize.
The rotating diode fault judgement is according to as shown in table 1:
Table 1
| The rotating diode state | Exciting current harmonic content coefficient I r |
| Working properly | I r≈15％～20％ |
| Rotating diode opens circuit | I r≈110％ |
| The rotating diode short circuit | I r≈200％ |
During the rotating diode operate as normal, harmonic current maintains 15%～20% rated exciting current; When rotating diode opened circuit, harmonic current rose to 110% rated exciting current; When harmonic current is 200% rated exciting current, be judged as the rotating diode short circuit.
Exciting current harmonic content coefficient I
rAccounting equation as follows:
Wherein, I
rBe exciting current harmonic content coefficient, I
E.maxBe transient exciting current maximal value, I
E.minBe transient exciting current minimum value, I
E=Be exciting current mean value.
Exciting current harmonic content coefficient I during the rotating diode operate as normal
rNeed parameter be set according to different model generator and Capacity Selection difference, be made as 15%～20% in the present embodiment.Fault output alarm delay time is made as 4s.
Whole fault judgement flow process is gathered exciting current as shown in Figure 3 when genset normally moves, carry out check and analysis by detection system, when harmonic current content is 15%～20% rated exciting current, and the rotating diode operate as normal; When harmonic current content rises to the 110% rated exciting current left and right sides, postpone 4s output alarm 1, representing rotating diode to open circuit; When harmonic current content rises to the 200% rated exciting current left and right sides, postpone 4s output alarm 2, representing the rotating diode short circuit.
Claims (2)
1. the rotating diode fault detection system based on microcomputer excitation regulator is characterized in that, comprising:
Isolated amplifier is used for the amplification of exciting current signal is obtained the amplified DC voltage signal;
The simulating signal load module is used to receive the amplified DC voltage signal and it is adjusted in the conversion range of setting, the simulating signal after adjusted;
The A/D modular converter is used to receive the simulating signal after the adjusting and is converted into digital signal;
Digital signal processing module is used for receiving digital signals and it is calculated, relatively and analyze;
And the alerting signal output module, be used for alerting signal is exported;
Wherein, described simulating signal load module, A/D modular converter, digital signal processing module and alerting signal output module all are integrated in the described microcomputer excitation regulator.
2. the rotating diode fault detection system based on microcomputer excitation regulator as claimed in claim 1 is characterized in that described digital signal processing module is selected dsp chip for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020625998 CN201886119U (en) | 2010-11-25 | 2010-11-25 | Rotary diode fault detection system based on microcomputer excitation adjuster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020625998 CN201886119U (en) | 2010-11-25 | 2010-11-25 | Rotary diode fault detection system based on microcomputer excitation adjuster |
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| Publication Number | Publication Date |
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| CN201886119U true CN201886119U (en) | 2011-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020625998 Expired - Fee Related CN201886119U (en) | 2010-11-25 | 2010-11-25 | Rotary diode fault detection system based on microcomputer excitation adjuster |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636751A (en) * | 2012-04-26 | 2012-08-15 | 中国人民解放军海军工程大学 | Alternating-current brushless generator fault detection method based on exciter exciting current |
| CN103777141A (en) * | 2012-10-22 | 2014-05-07 | 中广核工程有限公司 | Large generator brushless exciter online detection method, system and phase failure method |
| CN105548856A (en) * | 2015-12-28 | 2016-05-04 | 国电南瑞科技股份有限公司 | Brushless excitation-type generator set rotation diode detection system and method thereof |
| CN105826900A (en) * | 2016-05-17 | 2016-08-03 | 广东南丰电气自动化有限公司 | Microcomputer protection device capable of efficiently protecting brushless excitation generator |
| CN106199424A (en) * | 2016-06-29 | 2016-12-07 | 湖南工业大学 | A kind of permagnetic synchronous motor interturn short-circuit failure diagnosing method |
| CN107843805A (en) * | 2017-10-30 | 2018-03-27 | 华北电力大学（保定） | Brushless exciter rotating diode open fault inline diagnosis method |
| CN108490346A (en) * | 2018-05-18 | 2018-09-04 | 北京北重汽轮电机有限责任公司 | A kind of rotating fuse monitoring method and device |
| CN109738780A (en) * | 2019-02-02 | 2019-05-10 | 广东核电合营有限公司 | One tube open circuit detection method of multiphase corner connection brushless exciter rotating diode and system |
| CN112198826A (en) * | 2020-10-14 | 2021-01-08 | 中国石油大学(北京) | Submarine pipeline spiral excitation data acquisition device and method |
| CN112230117A (en) * | 2020-10-14 | 2021-01-15 | 三门核电有限公司 | Fault on-line detection system and method for AP1000 rod power supply unit rotating diode |
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2010
- 2010-11-25 CN CN 201020625998 patent/CN201886119U/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636751A (en) * | 2012-04-26 | 2012-08-15 | 中国人民解放军海军工程大学 | Alternating-current brushless generator fault detection method based on exciter exciting current |
| CN103777141A (en) * | 2012-10-22 | 2014-05-07 | 中广核工程有限公司 | Large generator brushless exciter online detection method, system and phase failure method |
| CN103777141B (en) * | 2012-10-22 | 2017-02-22 | 中广核工程有限公司 | Large generator brushless exciter online detection method, system and phase failure method |
| CN105548856B (en) * | 2015-12-28 | 2018-07-06 | 国电南瑞科技股份有限公司 | Brushless excitation pattern generating set rotating diode detecting system and method |
| CN105548856A (en) * | 2015-12-28 | 2016-05-04 | 国电南瑞科技股份有限公司 | Brushless excitation-type generator set rotation diode detection system and method thereof |
| CN105826900A (en) * | 2016-05-17 | 2016-08-03 | 广东南丰电气自动化有限公司 | Microcomputer protection device capable of efficiently protecting brushless excitation generator |
| CN106199424A (en) * | 2016-06-29 | 2016-12-07 | 湖南工业大学 | A kind of permagnetic synchronous motor interturn short-circuit failure diagnosing method |
| CN107843805A (en) * | 2017-10-30 | 2018-03-27 | 华北电力大学（保定） | Brushless exciter rotating diode open fault inline diagnosis method |
| CN108490346A (en) * | 2018-05-18 | 2018-09-04 | 北京北重汽轮电机有限责任公司 | A kind of rotating fuse monitoring method and device |
| CN109738780A (en) * | 2019-02-02 | 2019-05-10 | 广东核电合营有限公司 | One tube open circuit detection method of multiphase corner connection brushless exciter rotating diode and system |
| CN109738780B (en) * | 2019-02-02 | 2021-02-02 | 广东核电合营有限公司 | Multi-phase angle connection brushless exciter rotating diode one-tube open circuit detection method and system |
| CN112198826A (en) * | 2020-10-14 | 2021-01-08 | 中国石油大学(北京) | Submarine pipeline spiral excitation data acquisition device and method |
| CN112230117A (en) * | 2020-10-14 | 2021-01-15 | 三门核电有限公司 | Fault on-line detection system and method for AP1000 rod power supply unit rotating diode |
| CN112198826B (en) * | 2020-10-14 | 2022-01-25 | 中国石油大学(北京) | Submarine pipeline spiral excitation data acquisition device and method |
| CN112230117B (en) * | 2020-10-14 | 2023-11-24 | 三门核电有限公司 | Fault on-line detection system and method for rotating diode of AP1000 bar power unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110629 Termination date: 20141125 |
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| EXPY | Termination of patent right or utility model |