CN107991077B - A kind of hydrogovernor main control valve method for diagnosing faults - Google Patents
A kind of hydrogovernor main control valve method for diagnosing faults Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 230000015556 catabolic process Effects 0.000 claims abstract description 23
- 230000008859 change Effects 0.000 claims abstract description 20
- 230000033001 locomotion Effects 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims description 6
- 238000003745 diagnosis Methods 0.000 abstract description 12
- 230000003111 delayed effect Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000008358 core component Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012806 monitoring device Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000002405 diagnostic procedure Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- 230000035945 sensitivity Effects 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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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
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
- G05B23/0213—Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols
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- Control Of Turbines (AREA)
Abstract
The invention discloses a kind of hydrogovernor main control valve method for diagnosing faults, comprising the following steps: acquisition proportional servo valve feedback signal, main control valve position feed back signal and servomotor travel feedback signal carry out main with tripping breakdown judge；The rate of change that proportional servo valve feeds back rate of change, main control valve feedback rate of change and servomotor feedback is acquired, is carried out main with the unsmooth breakdown judge of movement；Proportional servo valve feedback signal, main control valve position feed back signal and servomotor travel feedback signal are acquired, main dispensing spool is carried out and blocks breakdown judge.Comprehensive descision proportional servo valve of the present invention is fed back, master matches feedback, main with position contact, servomotor travel feedback information, the method for carrying out fault diagnosis to the main control valve to hydrogovernor, this method accuracy of judgement is timely, and judgment basis is comprehensive, can accurately judge abort situation.
Description
Technical field
The present invention relates to the control technology fields of hydrogovernor main control valve, and in particular to a kind of hydrogovernor
Main control valve method for diagnosing faults.
Background technique
Hydrogovernor is the important equipment of hydraulic power plant, carries times for adjusting rotational speed of water turbine and control power output
Business, and main control valve is one of its most important executing agency, governor passes through electro-control converter proportional servo valve for electric signal
It is converted into direction and the flow signal of oil pressure, which amplifies by main control valve, operate to guide vane servomotor.
Main control valve is easy to generate bite because of the problems such as oil viscosity, impurity particle, abrasion between in actual use.Master matches
The superiority and inferiority of pressure valve working condition directly influences the regulation quality and safety and stability of unit, therefore can governor quickly and accurately
The working condition diagnosis for carrying out main control valve just seems particularly critical.
In recent years, the fault diagnosis technology of turbine-generator units has been widely applied in hydroelectric power plant, but at present
The system of application does not include the monitoring of water turbine governing equipment, and speed control device is control turbine-generator units revolving speed and power
The quality of important equipment, regulation quality and performance is directly related to the stable operation of unit.
The common master in hydroelectric power plant judges with tripping function at present, means that master is uniquely to main control valve with miss operation
The monitoring function that is judged of failure.By mixing installation master with travel position contact, by judging the electrical mistake of level-one main
Fast failure and master, which match, judges the main method for matching action failure in this group of direction Rule of judgment is not turned off.Its specific judgement is patrolled
Collect is to judge master by judging that master is coordinated in opening direction and unit frequency electrically overruns greater than level-one and is delayed again for a period of time
With tripping.Only can determine whether it is main with card resistance the opening direction the case where, and simultaneously due to the installation site of position switch and debugging gap
Not identical, this results in judging that the sensitivity of failure is different and same, and judgement conclusion is difficult to fully up to expectations.It is simple only by one
The position switch shutdown that judges whether should to overrun it is rather excessively careless, and trigger condition is harsh, and delay time is longer, until therefore
When barrier is quoted, failure influence has expanded.And there is no good mounting condition, failure triggering precisions with position contact by master
It is affected by construction personnel's level, the signal actually quoted is simultaneously unreliable, is not believed in most cases by engineering staff
Appoint, therefore the breakdown judge performs practically no function, practical effect is unsatisfactory.
Summary of the invention
It is an object of the invention to overcome deficiency in the prior art, a kind of hydrogovernor main control valve event is provided
Barrier diagnostic method, comprehensive descision proportional servo valve feedback, master match position contact, servomotor travel feedback information with feedback, master, from
And to the method that the main control valve of hydrogovernor carries out fault diagnosis, this method accuracy of judgement is timely, and judgment basis is comprehensive,
It can accurately judge abort situation.
In order to solve the above technical problems, the present invention provides a kind of hydrogovernor main control valve method for diagnosing faults,
It is characterized in that, comprising the following steps:
Step S1, acquisition proportional servo valve feedback signal, main control valve position feed back signal and servomotor travel feedback
Signal carries out main with tripping breakdown judge；
Step S2, what acquisition proportional servo valve feedback rate of change, main control valve feedback rate of change and servomotor were fed back
Rate of change carries out main with the unsmooth breakdown judge of movement；
Step S3, acquisition proportional servo valve feedback signal, main control valve position feed back signal and servomotor travel feedback letter
Number, it carries out main dispensing spool and blocks breakdown judge.
Further, in aforementioned step S1, the main detailed process for matching tripping breakdown judge are as follows: when proportional servo valve is anti-
Feedback is non-zero, and main control valve is fed back to zero, and servomotor movement tendency under the non-full off state of non-standard-sized sheet is zero, and be delayed
When time meets delay threshold, then judge to occur main with tripping failure.
Further, main with the detailed process for moving unsmooth breakdown judge are as follows: to work as proportional servo in aforementioned step S2
It is normal that valve feeds back rate of change, and the feedback rate of change of main control valve is slow, and the rate of change of servomotor feedback is slow, and
When delay time meets delay threshold, then judge to occur main with the unsmooth failure of movement.
Further, in aforementioned step S3, main dispensing spool blocks the detailed process of breakdown judge are as follows: works as proportional servo
Valve feedback with main control valve feedback it is contrary, and main control valve feed back motion trend be stopping and not in middle position, servomotor is anti-
Feedback then judges that main dispensing spool, which occurs, blocks failure in standard-sized sheet or closed positions, and when delay time meets delay threshold.
Further, the main control valve method for diagnosing faults operates in inside hydrogovernor controller.
Further, when judgement is broken down, governor controller issues fault alarm.
Compared with prior art, the beneficial effects obtained by the present invention are as follows being: the present invention passes through comprehensive descision proportional servo valve
Feedback, master are with feedback, master with position contact, servomotor travel feedback information to match to the core component master of hydrogovernor
The method that pressure valve carries out fault diagnosis, replaces current hydrogovernor main control valve only with a position contact switch and work
Condition judges the main method for matching failure.This method accuracy of judgement is timely, and judgment basis is comprehensive, can accurately judge abort situation simultaneously
It proposes corresponding maintenance decision, existing position contact judgment method is overcome to judge precision is unreliable, contact switch is difficult to install etc.
Disadvantage.And the fault diagnostic program may operate in inside governor, by obtaining the operating status of governor itself in real time,
Fault diagnosis and forecast can be carried out to governor main control valve.This method does not need the monitoring device by external dedicated, benefit
The fault diagnosis of governor main control valve can be realized with governor arrangement itself, there is low in cost, portable strong, configuration
It is flexible and changeable, save system resource the advantages that, can generally improve the ability of hydrogovernor main control valve breakdown judge.Using
This master carries out breakdown judge with method for diagnosing faults, can preferably substitute previous conventional method, has biggish popularization meaning
Justice.
Detailed description of the invention
Fig. 1 is governor main control valve fault diagnosis loop signal schematic diagram；
Fig. 2 is main with tripping fault logic decision flow chart；
Fig. 3 is main with the unsmooth fault logic decision flow chart of movement；
Fig. 4 is that main dispensing spool blocks fault logic decision flow chart.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following embodiment is only used for clearly illustrating the present invention
Technical solution, and not intended to limit the protection scope of the present invention.
In the prior art, governor main control valve control loop is, governor controller is by proportional servo valve control signal
Proportional servo valve is given, proportional servo valve output control signal drives main control valve, and main control valve reoperates servomotor to realize
Control function.Main control valve is easy to the generation of the problems such as because of oil viscosity, impurity particle, abrasion between in actual use
Bite etc. acts abnormal failure.
By analysis it is found that main control valve is output and input in the presence of closely connection, the voltage signal output and input
Volt value is equal and direction is identical, and feedback signal slightly lags behind control output.Servomotor travel feedback is monitored simultaneously, passes through relay
The trend analysis of the signal of device feedback may determine that servomotor exists and open, closure, stop three motion states, as main with pressure
The Rule of judgment of the Failure Mode Analysis of valve.
Governor main control valve fault diagnosis loop signal schematic diagram is as shown in Figure 1, main control valve fault diagnosis can incite somebody to action
Proportional servo valve feedback, main control valve position feedback, servomotor travel feedback carry out comprehensive descision, use patrolling between its feedback
Volume relationship is Rule of judgment, if relationship is departing from mentioned above principle between signal, can export alarm, prompting power plant service personnel into
Row troubleshooting.
Correspondingly, a kind of hydrogovernor main control valve method for diagnosing faults of the invention, specifically includes the following steps:
Step S1, acquisition proportional servo valve feedback signal, main control valve position feed back signal and servomotor travel feedback
Signal carries out main with tripping breakdown judge.
It is main to refer to that main control valve (referred to as master matches) spool is parked in middle position with tripping, it is unable to normal switch.It is main to match tripping failure
Logic judgment flow chart is as shown in Fig. 2, judgment method is, when proportional servo valve is fed back to non-zero, i.e. the input control of main control valve
Liquefaction is pressed with the trend of on or off, and main control valve is fed back to zero, servomotor movement tendency under the non-full off state of non-standard-sized sheet
It is zero, and is delayed a period of time (the delay time threshold value for meeting setting), then judges to occur main with tripping failure.The signal report
It can be used as the Rule of judgment of accidental shutdown under operating states of the units out.
Step S2, what acquisition proportional servo valve feedback rate of change, main control valve feedback rate of change and servomotor were fed back
Rate of change carries out main with the unsmooth breakdown judge of movement.
It is main with move it is unsmooth refer to that main dispensing spool can follow proportional servo valve to be acted, but movement has some setbacks, and has
Compared with large time delay.Judgment method is, when proportional servo valve feedback rate of change is normal, and the feedback rate of change of main control valve is slow
Slowly, the rate of change of servomotor feedback is slow, and is delayed a period of time, then judges that master occurs to be matched with unsmooth failure, master is moved
Move unsmooth fault logic decision flow chart as shown in Figure 3.The signal, which is quoted can be used as, overhauls alarm under operating states of the units
Rule of judgment.Master is mostly since main dispensing spool is worn or dirty with moving unsmooth, and the resistance of motion is larger and causes, and finds in advance
The failure can carry out early warning to power plant operations staff in advance and handle in time, prevent serious failure from occurring.
Step S3, acquisition proportional servo valve feedback signal, main control valve feedback signal and servomotor feedback signal, is led
Dispensing spool blocks breakdown judge.
Main dispensing spool block refer to main dispensing spool be stuck in evolution to or Guan Fangxiang, do not controlled by proportional servo valve, guide vane is complete
It opens or closes entirely.Main dispensing spool blocks fault logic decision flow chart in detail as shown in Figure 4, and judgment method is, when proportional servo valve is anti-
Feedback is contrary with main control valve feedback, and main control valve feed back motion trend is to stop and not in middle position, and servomotor, which is fed back, to exist
Standard-sized sheet or closed positions, and be delayed a period of time, then it is judged as that main dispensing spool, which occurs, blocks failure, which, which quotes, to make
For the Rule of judgment of accidental shutdown under operating states of the units.It is since main dispensing spool is by dirty oily shadow that main dispensing spool, which blocks mostly,
It rings, is stuck in open position or off-position, cause guide vane standard-sized sheet or full pass at this time, accidental shutdown reduction accident damage can be shifted to an earlier date by quoting this failure
It loses.
The present invention proposes that one kind is matched by comprehensive descision proportional servo valve feedback, master and feeds back, is main with position contact, servomotor
The method that the information such as travel feedback carry out fault diagnosis to the core component main control valve to hydrogovernor replaces current
Hydrogovernor main control valve judges the main method for matching failure only with a position contact switch and operating condition.This method is sentenced
Break accurately and timely, judgment basis is comprehensive, can accurately judge abort situation and propose corresponding maintenance decision, overcome existing position
Contact judgment method judges the disadvantages of precision is unreliable, contact switch is difficult to install.And the method for diagnosing faults can be run
Inside governor, by obtaining the operating status of governor itself in real time, failure can be carried out to governor main control valve and examined
Disconnected and prediction, when judgement is broken down, governor controller issues fault alarm.This method is not needed by external dedicated
The fault diagnosis of governor main control valve can be realized using governor arrangement itself for monitoring device, have low in cost, removable
Plant property is strong, configuration is flexible and changeable, saves the advantages that system resource, can generally improve hydrogovernor main control valve breakdown judge
Ability.Domestic more power plant require to carry out breakdown judge with method for diagnosing faults using new master at present, can preferably replace
For previous conventional method, there is biggish dissemination.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvements and modifications, these improvements and modifications can also be made
Also it should be regarded as protection scope of the present invention.
Claims (3)
1. a kind of hydrogovernor main control valve method for diagnosing faults, characterized in that the following steps are included:
Step S1, acquisition proportional servo valve feedback signal, main control valve position feed back signal and servomotor travel feedback signal,
It carries out main with tripping breakdown judge；
Step S2, the variation of acquisition proportional servo valve feedback rate of change, main control valve feedback rate of change and servomotor feedback
Rate carries out main with the unsmooth breakdown judge of movement；
Step S3, acquisition proportional servo valve feedback signal, main control valve position feed back signal and servomotor travel feedback signal, into
The main dispensing spool of row blocks breakdown judge；
In step sl, the main detailed process for matching tripping breakdown judge are as follows: when proportional servo valve is fed back to non-zero, and main control valve
Be fed back to zero, servomotor movement tendency under the non-full off state of non-standard-sized sheet is zero, and when delay time meets delay threshold,
Then judge to occur main with tripping failure；
In step s 2, main with the detailed process for moving unsmooth breakdown judge are as follows: when proportional servo valve feedback rate of change is normal,
And the feedback rate of change of main control valve is slow, the rate of change of servomotor feedback is slow, and delay time meets delay threshold
When value, then judge to occur main with the unsmooth failure of movement；
In step s3, main dispensing spool blocks the detailed process of breakdown judge are as follows: when proportional servo valve feedback is anti-with main control valve
Present contrary, and main control valve feed back motion trend is to stop and not in middle position, servomotor feedback in standard-sized sheet or closed positions,
And when delay time meets delay threshold, then judge that main dispensing spool, which occurs, blocks failure.
2. a kind of hydrogovernor main control valve method for diagnosing faults according to claim 1, characterized in that main with pressure
Valve method for diagnosing faults operates in inside hydrogovernor controller.
3. a kind of hydrogovernor main control valve method for diagnosing faults according to claim 2, characterized in that work as judgement
When breaking down, governor controller issues fault alarm.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711213514.5A CN107991077B (en) | 2017-11-28 | 2017-11-28 | A kind of hydrogovernor main control valve method for diagnosing faults |
| PCT/CN2018/088500 WO2019104969A1 (en) | 2017-11-28 | 2018-05-25 | Fault diagnosis method and device for main distributing valve of hydraulic turbine governor, and storage medium |
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| CN201711213514.5A CN107991077B (en) | 2017-11-28 | 2017-11-28 | A kind of hydrogovernor main control valve method for diagnosing faults |
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| CN107991077B true CN107991077B (en) | 2019-08-23 |
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Families Citing this family (10)
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| CN107991077B (en) * | 2017-11-28 | 2019-08-23 | 国电南瑞科技股份有限公司 | A kind of hydrogovernor main control valve method for diagnosing faults |
| CN109798281B (en) * | 2019-01-10 | 2020-05-12 | 中国长江电力股份有限公司 | Intelligent fault diagnosis and processing method for main distribution and proportional valve hydraulic following system of speed regulator |
| CN109578191B (en) * | 2019-01-10 | 2022-06-03 | 中国长江电力股份有限公司 | Intelligent fault diagnosis and processing method for main connection, main distribution and proportional valve hydraulic following system of speed regulator |
| CN109882252B (en) * | 2019-03-21 | 2021-08-03 | 广东核电合营有限公司 | Method, device, system, equipment and storage medium for detecting faults of water feeding pump |
| CN110907155A (en) * | 2019-12-02 | 2020-03-24 | 吉林松江河水力发电有限责任公司 | Fault monitoring method for rotating shaft of water turbine |
| CN112540595B (en) * | 2020-12-09 | 2022-02-08 | 中国长江电力股份有限公司 | Intelligent main pressure distribution valve with static and dynamic health state indication |
| CN113345289A (en) * | 2021-06-01 | 2021-09-03 | 华能澜沧江水电股份有限公司 | Training device and method for water turbine speed governor |
| CN114439676B (en) * | 2021-12-25 | 2024-01-26 | 华能澜沧江水电股份有限公司 | Hydraulic fault accurate analysis system and method for hydraulic turbine speed regulator |
| CN114923673A (en) * | 2022-04-02 | 2022-08-19 | 华能澜沧江水电股份有限公司 | Method for detecting looseness fault of piston rod and connecting nut of water turbine cylindrical valve power connector |
| CN115290316B (en) * | 2022-09-30 | 2022-12-27 | 艾坦姆流体控制技术(山东)有限公司 | Fault diagnosis method for eccentric rotary valve |
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2017
- 2017-11-28 CN CN201711213514.5A patent/CN107991077B/en active Active
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- 2018-05-25 WO PCT/CN2018/088500 patent/WO2019104969A1/en active Application Filing
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| EP2379923A1 (en) * | 2009-01-09 | 2011-10-26 | Metso Automation Oy | Method and apparatus for condition monitoring of valve |
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| WO2019104969A1 (en) | 2019-06-06 |
| CN107991077A (en) | 2018-05-04 |
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