CN109058036A - Control method is moved back in the S-shaped throwing of Hydropower Unit servomotor locking device - Google Patents
Control method is moved back in the S-shaped throwing of Hydropower Unit servomotor locking device Download PDFInfo
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- CN109058036A CN109058036A CN201810716558.8A CN201810716558A CN109058036A CN 109058036 A CN109058036 A CN 109058036A CN 201810716558 A CN201810716558 A CN 201810716558A CN 109058036 A CN109058036 A CN 109058036A
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- Prior art keywords
- locking
- throwing
- moved back
- locking device
- investment
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B15/00—Controlling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/16—Stators
- F03B3/18—Stator blades; Guide conduits or vanes, e.g. adjustable
- F03B3/183—Adjustable vanes, e.g. wicket gates
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Water Turbines (AREA)
Abstract
Control method is moved back in a kind of S-shaped throwing of Hydropower Unit servomotor locking device, it includes locking servomotor, displacement sensor positioned at locking level rear portion, respectively with investment chamber and exit the hydraulic control valve that chamber connect, the locking level of the locking servomotor when throwing is moved back, walk unhurriedly accelerated motion, and middle position quickly moves by start position, it walks unhurriedly retarded motion close to final position, the curve of the displacement versus time of locking level is in serpentine.The present invention overcomes impact force excessive problems when the locking of former Hydropower Unit wicket gate control, it is simple with structure, the curve of the displacement versus time of locking device is in serpentine, realize that locking device either moves back the start position of control in throwing or final position all has good cushion performance, it has also taken into account to throw simultaneously and has moved back the rapidity of control, the characteristics of uncontrolled device in the position of locking device powers on and changes by mistake change.
Description
Technical field
The invention belongs to the throwings of Hydropower Unit guide vane to move back control technology field, be related to a kind of Hydropower Unit servomotor locking device
S-shaped throwing move back control method.
Background technique
Guide vane servomotor of hydroelectric generating set is each equipped with locking device, needs to throw after compressor emergency shutdown and guide vane close entirely
Enter the device, with prevent servomotor because malfunction and caused by guide vane open, to ensure that Hydropower Equipment and the peace of personnel
Entirely；Before governor booting, need to extract locking device, guide vane just can be opened smoothly.
Control and position detection are moved back for the throwing of locking, traditional control mode is using pure opened loop control.This side
Formula controls locking displacement using a two-position four-way reversing solenoid valve, installs each peace with position is exited in the investment position of locking
A travel switch is filled to detect whether locking puts into, exits in place.Have the advantages that fast response time is moved back in throwing.But it is this pure to open
Ring locking throwing is moved back control mode and is impacted caused by locking very greatly, be easy to cause the mechanical position fracture of locking, causes equipment damage
With serious oil-spraying, this will seriously threaten the safe and stable operation of unit, or even threaten the person peace of field personnel
Entirely.
In order to solve shock problem caused by the pure open loop throwing of locking device is moved back, some water power science and technology practitioners propose use
Control mode is moved back in closed loop throwing.This mode controls locking displacement using a proportion magnetic valve, installs one in locking bar portion
The displacement of locking is introduced controller, realizes that closed loop has poor control by displacement sensor.This closed loop locking throwing is moved back control mode and is subtracted
The impact for moving back final position is thrown in small locking.But closed loop locking throwing moves back control mode and still has biggish punching in start position
Hit, and throw that move back the time used in process be 6 times of open loop mode or more, this will lead to startup-shutdown single step process time-out, cause from
Dynamic startup-shutdown failure.
In view of guide vane servomotor of hydroelectric generating set locking device throw move back control resiliency and rapidity both need
There are certain paradoxes between asking.Therefore, it develops a kind of locking throwing for taking into account resiliency and rapidity and moves back control method, to mentioning
High Hydropower Equipment and personal safety are horizontal, and promoting hydroelectric generation Business Economic Benefit has great significance.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of throwings of the S-shaped of Hydropower Unit servomotor locking device to move back control
Method moves back control in locking device throwing and walks unhurriedly accelerations close to start position, and middle position quickly moves, and delays close to final position
Retarded motion is walked, makes the curve of the displacement versus time of locking device in serpentine, realizes that locking device either moves back control in throwing
Start position or final position all have good cushion performance, while also having taken into account the rapidity thrown and move back control, lock ingot
The uncontrolled device in the position of device powers on and changes by mistake change.
In order to solve the above technical problems, the technical scheme adopted by the invention is that: a kind of Hydropower Unit servomotor locking dress
Set S-shaped throwing move back control method, it include locking servomotor, the displacement sensor positioned at locking level rear portion, respectively with investment chamber
With the hydraulic control valve for exiting chamber and connecting, the locking level of the locking servomotor when throwing is moved back, walk unhurriedly accelerated motion by start position,
Middle position quickly moves, and walks unhurriedly retarded motion close to final position, and the curve of the displacement versus time of locking level is in serpentine.
The throwing of the locking level moves back state by withdrawal process, investment process, extraction impaction state and investment impaction state phase
Mutual switching control.
The controller power-on initialization stage of the hydraulic control valve, by the reality of locking displacement feedback element detection locking
Position is proximate to investment position and still extracts position, assigns original state to controller.
The throwing of the locking level is moved back state and is determined by the value of register.
The register is set to 1, and serpentine locking throwing moves back controlling behavior and is in withdrawal process, deviator investment.
The register is set to 3, and serpentine locking, which is thrown, moves back controlling behavior in impaction state is extracted, and deviator is removed.
The register is set to 2, and serpentine locking throwing moves back controlling behavior and is in investment process, deviator investment.
The register is set to 4, and serpentine locking, which is thrown, moves back controlling behavior in investment impaction state, and deviator is removed.
Control method is moved back in a kind of S-shaped throwing of Hydropower Unit servomotor locking device, it includes locking servomotor, is located at locking
The displacement sensor at bar rear portion, respectively with investment chamber and exit the hydraulic control valve that chamber connect, the locking for locking servomotor
Bar when throwing is moved back, walk unhurriedly accelerated motion by start position, and middle position quickly moves, and walks unhurriedly retarded motion close to final position, lock
The curve of the displacement versus time of fixed pole is in serpentine.The present invention overcomes impact force when the locking of former Hydropower Unit wicket gate control is excessive
The problem of, have structure simple, the curve of the displacement versus time of locking device is in serpentine, realizes that locking device is either being thrown
The start position or final position for moving back control all have good cushion performance, while also having taken into account throwing and having moved back the quick of control
The characteristics of property, the uncontrolled device in the position of locking device powers on and changes by mistake change.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples:
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is that control schematic diagram is moved back in present invention throwing.
Fig. 3 is investment process displacement curve figure of the present invention.
Fig. 4 is withdrawal process displacement curve figure of the present invention.
Fig. 5 is that S-shaped of the present invention and open loop and closed loop put into process displacement comparison curve graph.
Fig. 6 is S-shaped of the present invention and open loop and closed loop withdrawal process displacement comparison curve graph.
In figure: locking servomotor 1, locking level 11 put into chamber 12, exit chamber 13, displacement sensor 2, hydraulic control valve 3.
Specific embodiment
In Fig. 1 ~ Fig. 6, control method is moved back in a kind of S-shaped throwing of Hydropower Unit servomotor locking device, it includes that locking connects
Power device 1, the displacement sensor 2 positioned at 11 rear portion of locking level, respectively with investment chamber 12 and exit the hydraulic control valve that chamber 13 connect
3, the locking level 11 of the locking servomotor 1 when throwing is moved back, walk unhurriedly accelerated motion, and middle position quickly moves, leans on by start position
Nearly final position is walked unhurriedly retarded motion, and the curve of the displacement versus time of locking level 11 is in serpentine.Realize that locking device either exists
It throws the start position for moving back control or final position all has good cushion performance, while also having taken into account throwing and having moved back the fast of control
Speed, the uncontrolled device in the position of locking device power on and change by mistake change.
The throwing of the locking level 11 moves back state by withdrawal process, investment process, extraction impaction state and investment impaction state
Mutual switching control.Realize that lock ingot throwing moves back control and all has good cushion performance in start position or final position, and
It reduces to the greatest extent to throw and moves back control duration used；This throwing moves back 2 times that duration used in control mode is only pure opened loop control duration
Left and right.
The controller power-on initialization stage of the hydraulic control valve 3, by the reality of locking displacement feedback element detection locking
Border position is proximate to investment position and still extracts position, assigns original state to controller.Controller is assigned suitable initial
State realizes that the uncontrolled device in the position of locking device powers on and change by mistake the function of change.
The throwing of the locking level 11 is moved back state and is determined by the value of register.Being assigned by register and throwing regression is different value controls
The movement of lockmaking fixed pole 11, respectively linking is steady between movement.
The register is set to 1, and serpentine locking throwing moves back controlling behavior and is in withdrawal process, deviator investment.Deviator
Target value is given as extracting position (1.0), by the S-shaped algorithm of controller, to realize the lasting tune to hydraulic control valve opening
Section, to guarantee to lock ingot withdrawal process displacement curve in serpentine；Realization is slowly moved in beginning and end position, in interposition
The requirement fast moved is set, ensure that the resiliency of lock ingot withdrawal process and the rapidity of extraction.
The register is set to 3, and serpentine locking, which is thrown, moves back controlling behavior in impaction state is extracted, and deviator is removed.
Deviator excision, the given extraction position of S-shaped algorithmic controller compress bias+λ, and hydraulic control valve opening, which is in, extracts
Be open offset bit；After lock ingot is in and extracts position, there is the hydraulic coupling of a compression, extracts position to ensure that lock ingot is in always
It sets, guarantees that lock ingot will not be because of slip caused by permeability；One constant extraction position compresses bias+λ, guarantees S
The output of shape algorithmic controller is constant, abrasion aggravation caused by avoiding the spool of hydraulic control valve from moving repeatedly, to extend liquid
Press the service life of equipment；After deviator is removed, controller is in open loop mode operation, and lock ingot is extracted state and can be obtained always
To maintenance, without by feedback devices such as displacement sensors failure or jump influenced；This had both enhanced the reliability of equipment,
Also the peace for reducing displacement sensor maintenance arranges range, is conducive to the development of plant maintenance work.
The register is set to 2, and serpentine locking throwing moves back controlling behavior and is in investment process, deviator investment.Deviator
Target value is given as extracting position (0.0), by the S-shaped algorithm of controller, to realize the lasting tune to hydraulic control valve opening
Section, to guarantee to lock ingot withdrawal process displacement curve in serpentine；Realization is slowly moved in beginning and end position, in interposition
The requirement fast moved is set, ensure that the resiliency of lock ingot investment process and the rapidity of investment.
The register is set to 4, and serpentine locking, which is thrown, moves back controlling behavior in investment impaction state, and deviator is removed.
The given extraction position of S-shaped algorithmic controller compresses bias-λ, and hydraulic control valve opening is in investment opening offset bit；
After lock ingot is in investment position, there is the hydraulic coupling of a compression, is in investment position always to ensure to lock ingot, guarantees lock ingot not
It can be because being put into caused by permeability not in place；One constant investment position compresses bias-λ, guarantees S-shaped algorithmic controller
Output it is constant, avoid the spool of hydraulic control valve move repeatedly caused by abrasion aggravation, to extend the use of hydraulic device
Service life；After deviator is removed, controller is in open loop mode operation, and lock ingot investment state can be maintained always, without
It is influenced by the failure of the feedback devices such as displacement sensor or jump；This had both enhanced the reliability of equipment, also reduced position
The peace of displacement sensor maintenance arranges range, is conducive to the development of plant maintenance work.
It is stable that more former guide vane servomotor of hydroelectric generating set lock ingot only " puts into " (0.0) and " extraction " (1.0) two
Position, without being stopped in middle position.S-shaped throwing moves back control method using this point, and electric initial phase, leads on the controller
Cross lock spindle position move feedback element come detect lock ingot physical location be proximate to investment position still extract position, to assign register
One initial value to match with the currently practical state of locking device, to ensure that on the uncontrolled device in the position of locking device
Electricity and change by mistake change, it is ensured that locking device investment exits the reliability of state.
Throwing the hydraulic control valve for moving back control method use because of S-shaped lock ingot has the function of powering off clear point, so using this
When the control device power-off of method production, still can effectively maintain in the locking device short time current state without
Change, further ensure locking device investment or exits the reliability of state.
Control method is moved back in the S-shaped throwing of Hydropower Unit servomotor locking device as described above, when installing and using, with certain water power
For standing, as feedback element, which is one stay-supported type displacement sensor of installation on guide vane lock ingot servomotor
Two-wire system 4..20mA, collected lock spindle position shifting signal are sent into the Analog input mModule of PLC.Hydraulic control valve is using power-off
The proportioning valve of position in runback, it is -100%..+100% that 4..20mA, which corresponds to valve openings, which should be little
It is advisable in 0.2s, for the sake of security, power supply mode preferably takes DC24V to power.Controller uses Schneider Quantum system
Arrange PLC.S-shaped algorithm is realized using ST Programming with Pascal Language.Switch is realized using ladder diagram either logical block figure programming, also adjustable
The module carried with library function.
What Schneider Quantum series of PLC was detected when powering on or powering off by locking spindle position displacement sensor
Displacement information, to assign an initial value to match with locking device virtual condition to internal register Change, thus
Ensure that the uncontrolled device in the position of locking device powers on and changes by mistake change, it is ensured that locking device put into or exit state can
By property.
Since power station lock ingot throws the proportioning valve for moving back the hydraulic control valve of control using position in power-off runback,
When this control device powers off, current state still can be effectively maintained in the locking device short time without changing, therefore
It further ensures locking device investment or exits the reliability of state.
By being compared to the signal of displacement sensor acquisition with putting into or extracting position definite value inside controller, externally
It outputs lock ingot investment position and lock ingot extracts position switch amount signal, the on-off model is for controlling cabinet panel signal lamp
With feeding computer supervisory control system, used as startup-shutdown Row control.
Lock ingot investment exit instruction both can come from computer supervisory control system, also may be from control cabinet panel button or
It touches screen virtual button.
The above embodiments are only the preferred technical solution of the present invention, and are not construed as limitation of the invention, this Shen
Please in embodiment and embodiment in feature in the absence of conflict, can mutual any combination.Protection model of the invention
The technical solution that should be recorded with claim is enclosed, the equivalent replacement side of technical characteristic in the technical solution recorded including claim
Case is protection scope.Equivalent replacement i.e. within this range is improved, also within protection scope of the present invention.
Claims (8)
1. control method is moved back in a kind of S-shaped throwing of Hydropower Unit servomotor locking device, it includes locking servomotor (1), is located at lock
The displacement sensor (2) at fixed pole (11) rear portion, respectively with investment chamber (12) and exit the hydraulic control valve (3) that chamber (13) connect,
It is characterized in that: the locking level (11) of locking servomotor (1) is when throwing is moved back, start position is walked unhurriedly accelerated motion, middle position
Quickly movement is walked unhurriedly retarded motion close to final position, and the curve of the displacement versus time of locking level (11) is in serpentine.
2. control method is moved back in the S-shaped throwing of Hydropower Unit servomotor locking device according to claim 1, it is characterized in that: institute
The throwing for stating locking level (11) is moved back state and is mutually switched by withdrawal process, investment process, extraction impaction state and investment impaction state
Control.
3. control method is moved back in the S-shaped throwing of Hydropower Unit servomotor locking device according to claim 2, it is characterized in that: institute
The controller power-on initialization stage for stating hydraulic control valve (3), the physical location by locking displacement feedback element detection locking are
Position is still extracted close to investment position, assigns original state to controller.
4. control method is moved back in the S-shaped throwing of Hydropower Unit servomotor locking device according to claim 2, it is characterized in that: institute
The throwing for stating locking level (11) is moved back state and is determined by the value of register.
5. control method is moved back in the S-shaped throwing of Hydropower Unit servomotor locking device according to claim 4, it is characterized in that: institute
It states register and is set to 1, serpentine locking throwing moves back controlling behavior and is in withdrawal process, deviator investment.
6. control method is moved back in the S-shaped throwing of Hydropower Unit servomotor locking device according to claim 4, it is characterized in that: institute
It states register and is set to 3, serpentine locking, which is thrown, moves back controlling behavior in impaction state is extracted, and deviator is removed.
7. control method is moved back in the S-shaped throwing of Hydropower Unit servomotor locking device according to claim 4, it is characterized in that: institute
It states register and is set to 2, serpentine locking throwing moves back controlling behavior and is in investment process, deviator investment.
8. control method is moved back in the S-shaped throwing of Hydropower Unit servomotor locking device according to claim 4, it is characterized in that: institute
It states register and is set to 4, serpentine locking, which is thrown, moves back controlling behavior in investment impaction state, and deviator is removed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810716558.8A CN109058036B (en) | 2018-07-03 | 2018-07-03 | S-shaped switching control method for servomotor locking device of hydroelectric generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810716558.8A CN109058036B (en) | 2018-07-03 | 2018-07-03 | S-shaped switching control method for servomotor locking device of hydroelectric generating set |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109058036A true CN109058036A (en) | 2018-12-21 |
| CN109058036B CN109058036B (en) | 2020-05-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810716558.8A Active CN109058036B (en) | 2018-07-03 | 2018-07-03 | S-shaped switching control method for servomotor locking device of hydroelectric generating set |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01184524A (en) * | 1988-01-20 | 1989-07-24 | Nippon Typewriter Co Ltd | Picture display device |
| CN1220644A (en) * | 1997-02-06 | 1999-06-23 | 贝林格液压设备有限公司 | Method and device for controlling hydraulic lift |
| CN202733131U (en) * | 2012-07-13 | 2013-02-13 | 常州液压成套设备厂有限公司 | Ball valve servomotor with hydraulic locking device |
| CN204062126U (en) * | 2014-06-27 | 2014-12-31 | 自贡高中压阀门厂 | Hydroturbine water intake valve interlocking protective device |
| CN104373277A (en) * | 2014-11-10 | 2015-02-25 | 常州液压成套设备厂有限公司 | Servomotor locking device |
| CN204253487U (en) * | 2014-11-28 | 2015-04-08 | 郑州宇通重工有限公司 | For the hydraulic buffering valve of the wheel type traveling mechanism of fluid motor-driven |
| CN106837901A (en) * | 2017-04-12 | 2017-06-13 | 北京机械设备研究所 | A kind of Erecting System control method for reducing hydraulic starting impact |
-
2018
- 2018-07-03 CN CN201810716558.8A patent/CN109058036B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01184524A (en) * | 1988-01-20 | 1989-07-24 | Nippon Typewriter Co Ltd | Picture display device |
| CN1220644A (en) * | 1997-02-06 | 1999-06-23 | 贝林格液压设备有限公司 | Method and device for controlling hydraulic lift |
| CN202733131U (en) * | 2012-07-13 | 2013-02-13 | 常州液压成套设备厂有限公司 | Ball valve servomotor with hydraulic locking device |
| CN204062126U (en) * | 2014-06-27 | 2014-12-31 | 自贡高中压阀门厂 | Hydroturbine water intake valve interlocking protective device |
| CN104373277A (en) * | 2014-11-10 | 2015-02-25 | 常州液压成套设备厂有限公司 | Servomotor locking device |
| CN204253487U (en) * | 2014-11-28 | 2015-04-08 | 郑州宇通重工有限公司 | For the hydraulic buffering valve of the wheel type traveling mechanism of fluid motor-driven |
| CN106837901A (en) * | 2017-04-12 | 2017-06-13 | 北京机械设备研究所 | A kind of Erecting System control method for reducing hydraulic starting impact |
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| CN109058036B (en) | 2020-05-26 |
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