CN104879270B - The electro-hydraulic adjusting method of blade and device of the high oil pressure cntrol hydraulic turbine - Google Patents
The electro-hydraulic adjusting method of blade and device of the high oil pressure cntrol hydraulic turbine Download PDFInfo
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- 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
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Abstract
The invention discloses a kind of high electro-hydraulic adjusting method of oil pressure cntrol hydraulic turbine blades, a kind of fuzzy mathematical model for the selection blade angle computation method established according to power station hydrological data and unit parameter.Electro-hydraulic actuator is adjusted by high oil pressure cntrol blade with head and changes in flow rate and adjusts runner blade to angle is calculated, higher water energy transformation efficiency is obtained, realizes the maximum target of high oil pressure cntrol blade angle fast regulating turbine-generator units annual electricity generating capacity.Its key technology is：Hydraulic turbine blades adjusting actuator uses high oil pressure control system, using the bulb floating seal of standard, overcomes high oil pressure rotary seal Leakage completely.The technological gap that Kaplan turbine group is adjusted using high oil pressure speed regulator system control blade has been filled up, great technological innovation is realized to hydraulic turbine structure design.
Description
Technical field
The present invention relates to a kind of electro-hydraulic adjusting method of blade of high oil pressure cntrol hydraulic turbine and device, between rotary propeller type water wheels
Tune propeller type water turbine between machine and fixed blade propeller turbine, controlled using high oil pressure speed regulator system, the operation of dynamic regulation blade
Angle so that turbine-generator units choose suitable angle operation, obtain higher water all the time in different operating condition regions
Can transformation efficiency.
Background technology
Now, energy situation is nervous.The non-renewable resources increasingly depleted such as oil, coal, makes people to renewable resource
Dependence increasingly increase.This is exactly the main reason for water power, wind-powered electricity generation, solar power generation are flourished.And can in many
In the renewable sources of energy, the economy of water power is optimal.With the extensive exploitation of middle high-head power station, developable resource increasingly subtracts
It is few.In recent years, head H≤50m, its unit pattern are mainly bulb-type hydraulic generating set, axial flow fixed propeller and axial-flow rotary propeller type
Unit, the main flow of hydroelectric resources exploitation has been increasingly becoming it.
The hydraulic turbine is the nucleus equipment of hydro-electric power generating equipment, and runner is to realize that water can be converted into the heart component of mechanical energy.
Axial flow fixed paddle type turbine-generator units, its blade placement angle is unadjustable, and higher water energy only can be obtained in single flow
Transformation efficiency, when unit deviates optimum operating condition, import current produce impact in paddle head, and the separation of flow is produced at the back side of blade
And cavitation corrosion, larger hydraulic loss is produced, causes vibration, water energy transformation efficiency can drastically decline.
The guide vane and blade angle of Kaplan turbine keep combination relationship, and effect can be converted by obtaining higher water all the time
Rate.But its blade is adjusted by oil head, for oil head because its is complicated, sealing is difficult, be usually present more or less oil leak,
Alter oily problem pollution environment.The pump start also resulted in governor oil pressure device is frequent, to oil pump serious wear, and is lost
A large amount of station services.
In today and tomorrow that the energy is very in short supply, environmental and safety problems pendulum is in a ratio in the exploitation design of power station
More important position, construction costs need to be reduced and reduce running cost, improve resource utilization, by being developed to hydroelectric resources is balanced
The great potential of HYDROELECTRIC ENERGY technology is excavated with the continuous exploration of sustainable development and technological progress.
In order to overcome the technical deficiency of existing fixed blade propeller turbine and Kaplan turbine, it is necessary to a kind of simple, side
Just, economic, practical, environmentally friendly high oil pressure cntrol hydraulic turbine blades electrohydraulic control equipment.Using advanced blade angle calculation side
The mathematical modeling of method, solves the problems, such as the optimized operation for adjusting propeller type water turbine, i.e., with head and changes in flow rate by adjusting runner
Blade proper angle, the adaptability of unit operation operating mode is improved, solves the problems, such as that fixed blade propeller turbine group high efficient area is narrow,
Expand the application of unit, it is ensured that runner is run under more excellent operating mode during different flow, and obtaining higher water all the time can convert
Efficiency.And high oil pressure cntrol hydraulic turbine blades electrohydraulic control equipment, there is no combination relationship with stator, blade regulation uses high oil pressure
Control system, speed regulator small volume, in light weight, cost reduce, while change the blade operating system of Kaplan turbine, take
Disappeared oil head and corresponding operating oil line, wheel hub lubricating oil pipe etc., so that unit runner realizes no oil condition in operation.
Using the swivel joint bulb floating seal of standard, solve because of the environmental pollution caused by oil leak and oil pump frequent starting the problems such as,
Station service is saved, simplify control link, labour cost and equipment investment and maintenance cost is saved for power station, is brought to power station considerable
Economic benefit, prevent environmental pollution of the oil leak to river.And operation is more convenient, safe and reliable.The high oil pressure cntrol hydraulic turbine
Blade electrohydraulic control equipment technology at home and abroad without precedent is applied, has filled up power station Kaplan turbine group and has used high oil pressure
The technological gap of speed regulator system control, great technological innovation is realized to turbine-generator units structure design, is had larger
Economic potential and promotional value.
The hydrologic parameter in some special power stations concentrates on three to four operating mode operations, corresponding to be adjusted equivalent to runner blade
3rd, four angles, this power station, using the blade electrohydraulic control equipment of the high oil pressure cntrol hydraulic turbine, there is highly important warp
Ji and social benefit.
The content of the invention
An object of the present invention is to provide a kind of high oil pressure cntrol water wheels for obtaining higher water energy transformation efficiency all the time
The electro-hydraulic adjusting method of blade of machine.
The second object of the present invention is to provide a kind of high oil pressure cntrol water wheels for obtaining higher water energy transformation efficiency all the time
The blade electrohydraulic control equipment of machine.
One of to achieve these goals, technical scheme provided by the invention is：A kind of high oil pressure cntrol hydraulic turbine is provided
The electro-hydraulic adjusting method of blade, in hydraulic turbine blades angular adjustment control system, using high oil pressure governor control system, pass through
The fuzzy mathematical model computational methods of blade angle, under turbine-generator units difference operating condition, blade angle carries out dynamic tune
Section control, adjusts to suitable blade angle and runs, and solves the problems, such as that the operation of fixed blade propeller turbine group high efficient area is narrow, expands
The range of operation of large-sized unit.Unit is realized under different operating conditions, higher water energy transformation efficiency is obtained, makes full use of water
Energy.Comprise the following steps：
(1) database of rotary wheel of water turbine model combined characteristic is established；
(2) rotary wheel of water turbine model combined characteristic is imported into database；
(3) power station diurnal courses amount sequence and head data all the year round are imported；
(4) fuzzy mathematical model of blade angle regulating calculation is established, is trained by data, model meets that enough accuracy will
Ask；
(5) using blade angle beta as parameter to be asked, the hydrographic data of combining step (3) importing, establish using efficiency eta as centre
Variable, the Optimized model of object function is up to annual electricity generating capacity E.According to object function and safety and stability restrictive condition, use
Optimized algorithm, try to achieve blade angle
(6) real-time working condition parameter of online acquisition turbine-generator units operation：Net water head H, unit quote flow Q so as to really
Determine the switching point of blade angle；
(7) using high oil pressure speed regulator control runner blade servomotor, in case of a dynamic basis, can taking human as manually or
Electronic control mode, make the hydraulic oil blade regulation electro-hydraulic actuator motion positioned at generator side, adjust the corner of blade, when up to
To after required corner, input mechanically or hydraulically locks, and blade is fixed, so as to realize the purpose of blade angular adjustment.
The fuzzy mathematical model is：
In above-mentioned fuzzy mathematical model：
I is blade stepping number；
ε is convergence precision；
EiFor in specific hydrologic process, blade is divided into maximum generating watt during i shelves；
β is blade angle；
H (t) is t head；
Q (t) is t flow；
Q11For unit discharge of hydraulic turbine；
n11For unit speed of hydraulic turbine；
η(Q11,H11, β) and it is the efficiency that operating point is corresponded to when blade angle is β；
DiWhen being divided into i shelves for blade, the set of all i blade angle combinations compositions；
{β1,β2,…βiIt is the combination that i blade angle is formed；
αβminWhen for blade angle being β, the minimum angles of stator；
αβmaxWhen for blade angle being β, the maximum angle of stator；
αβWhen for blade angle being β, the angle of stator.
The regulating calculation method of blade operation angle, including the step (1), (2), (3), (4), (5), (6), its step
(4) fuzzy mathematical model described in is using having self-learning function neural network model, according to running status, constantly adaptively more
New optimization database, improves precision；Object function requirement in the step (5) is maximum for annual electricity generating capacity；The step
(6) switching point of turbine-generator units blade angle in, is up to target with efficiency and is formulated.
To achieve these goals two, technical scheme provided by the invention is：A kind of high oil pressure cntrol hydraulic turbine is provided
Blade electrohydraulic control equipment, including：Generator casing, set main shaft, blade servomotor, solenoid valve block, oil-way integrated block, position
Displacement sensor, the critical component oil-way integrated block are fixed on generator casing, not the big axle rotation of random groups；The oil circuit collection
Blocking oil pipe line is delivered to pressure oil in the blade servomotor of rotation using elastic high-pressure hose, and on the oil-way integrated block
Non-contacting blade displacement transducer is also equipped with, realizes the closed loop regulation of blade angle position, the blade servomotor shell
It is fixed on set end main shaft, the servomotor piston is fixed on action bars, and is rotated simultaneously with set main shaft, the piston
Being operated by hydraulic oil drives blade blade to rotate, and the solenoid valve block and electric control gear of the blade regulation can be individually designed,
Can be placed in high oil pressure speed regulator switch board, the blade electrohydraulic control equipment can vertical or horizontal installation, overturned and turned oar
The structure of formula hydraulic turbine blades oil head.
The blade electrohydraulic control equipment of the high oil pressure cntrol hydraulic turbine uses the swivel joint bulb floating seal of standard,
This is sealed into high speed and high pressure sealing structure, no sealing ring contact wear, is produced when running at high speed without frictional heat, its maximum speed can
Up to 1500r/min, MTP grade is up to 25MPa.
The purpose of blade angular adjustment can be realized in the step (7) taking human as manually or electrically control mode.
Compared with prior art, beneficial effects of the present invention are：By high oil pressure cntrol blade angular adjustment, with reference to blade
The fuzzy mathematical model that angle adjustment calculates, so that the tune propeller type water turbine group of dull section, possesses Kaplan turbine
Regulatory function, water turbine set under different operating conditions, to blade carry out dynamic regulation, realize unit in different operations
Under operating mode, keep obtaining higher water energy transformation efficiency.Make full use of water energy.Use the high electro-hydraulic tune of oil pressure cntrol hydraulic turbine blades
Regulating device, speed regulator small volume, in light weight, cost reduce, and change the blade operating system of Kaplan turbine, eliminate by
Oily device and corresponding operating oil line, wheel hub lubricating oil pipe etc., so that unit runner realizes no oil condition in operation.Using mark
Accurate swivel joint bulb floating seal, thoroughly solve because of the environmental pollution caused by oil leak and oil pump frequent starting the problems such as, section
Station service is saved, simplify control link, labour cost and equipment investment and maintenance cost is saved for power station, is brought to power station considerable
Economic benefit, prevent environmental pollution of the oil leak to river.
It will be become more fully apparent by following description and with reference to accompanying drawing, the present invention, these accompanying drawings are used to explain the present invention
Embodiment.
Brief description of the drawings
Fig. 1 is the structural representation of the blade electrohydraulic control equipment of the high oil pressure cntrol hydraulic turbine of the present invention.
The FB(flow block) of the electro-hydraulic adjusting method of blade of the high oil pressure cntrol hydraulic turbine of Fig. 2 present invention.
Embodiment
Embodiments of the invention are described with reference now to accompanying drawing, similar element numbers represent similar element in accompanying drawing.Such as
Upper described, as shown in Figure 1, 2, the present invention provides a kind of blade electrohydraulic control equipment 100 of the high oil pressure cntrol hydraulic turbine, such as Fig. 1
It is shown including：Generator casing 1, set main shaft 2, piston 3, action bars 4, oil-way integrated block 5, displacement transducer line 6, displacement pass
Sensor 7, adjusting means cover 8, peep hole 9, blade servomotor 10, solenoid valve block 11, the blade servomotor 10 are fixed on unit
On main shaft 2, the piston 3 is fixed on action bars 4, and is rotated simultaneously with set main shaft 2, and the piston 3 is grasped by hydraulic oil
Make to drive blade blade to rotate, the oil-way integrated block 5 is fixed on the generator casing 1, do not revolved with the set main shaft 2
Turn, the oil pipe line of the oil-way integrated block 5 is delivered to pressure oil in the blade servomotor of rotation using elastic high-pressure hose 51, institute
To state and oil return pipe 52 is also associated with oil-way integrated block 5, flexible connection mode is delivered to pressure oil in the blade servomotor of rotation,
Vibrations, displacement are avoided in running.And non-contacting blade displacement transducer 7 is also equipped with the oil-way integrated block 5, it is real
The closed loop regulation of existing blade angle position.In the solenoid valve block 11, operation valve, hydraulic valve, choke valve, safety valve are provided with.
Can be individually designed with electric control gear, it can also be placed in high oil pressure speed regulator switch board.
The critical seal device uses the swivel joint bulb floating seal using standard, its feature：This is sealed into height
Fast high pressure seal structure, no sealing ring contact wear, produced when running at high speed without frictional heat, operation moment of torsion not by operating pressure and
Temperature influences, and its internal leakage is less than 100ml/min, maximum speed up to 1500r/min, MTP grade up to 25MPa,
And there is independent hydraulic fluid port to discharge, on environment without influence, it is safe and reliable.
The blade electrohydraulic control equipment can vertical or horizontal installation, overturned Kaplan turbine blade oil head
Structure, and high oil pressure rotary seal leakage phenomenon is overcome completely.
As shown in Fig. 2 to achieve these goals two, technical scheme provided by the invention is：A kind of high oil pressure is provided
The electro-hydraulic adjusting method of blade of the hydraulic turbine is controlled, it comprises the following steps：
S001 establishes the database of rotary wheel of water turbine model combined characteristic；
Rotary wheel of water turbine model combined characteristic is imported database by S002；
S003 imports power station diurnal courses amount sequence and head data all the year round；
S004 establishes the fuzzy mathematical model of blade angle regulating calculation, is trained by data, and model meets enough accuracy
It is required that；
S005 the hydrographic data of combining step (4) importing, is established using efficiency eta as centre using blade angle beta as parameter to be asked
Variable, the Optimized model of object function is up to annual electricity generating capacity E.According to object function and safety and stability restrictive condition, use
Optimized algorithm, try to achieve blade angle { β1,β2,…βi}；
The real-time working condition parameter of S006 online acquisitions turbine-generator units operation：Net water head H (t), unit quote flow Q
(t) so that it is determined that the switching point of blade angle；
S007 using high oil pressure speed regulator control runner blade servomotor, in case of a dynamic basis, can taking human as manually or
Electronic control mode, make the hydraulic oil blade regulation electro-hydraulic actuator motion positioned at generator side, adjust the corner of blade, when up to
To after required corner, input mechanically or hydraulically locks, and blade is fixed, so as to realize the purpose of blade angular adjustment；
Wherein fuzzy mathematical model is：
In above-mentioned fuzzy mathematical model：
I is blade stepping number；
ε is convergence precision；
EiFor in specific hydrologic process, blade is divided into maximum generating watt during i shelves；
β is blade angle；
H (t) is t head；
Q (t) is t flow；
Q11For unit discharge of hydraulic turbine；
n11For unit speed of hydraulic turbine；
η(Q11,H11, β) and it is the efficiency that operating point is corresponded to when blade angle is β；
DiWhen being divided into i shelves for blade, the set of all i blade angle combinations compositions；
{β1,β2,…βiIt is the combination that i blade angle is formed；
αβminWhen for blade angle being β, the minimum angles of stator；
αβmaxWhen for blade angle being β, the maximum angle of stator；
αβWhen for blade angle being β, the angle of stator.
The fuzzy mathematical model is using having self-learning function neural network model, continuous adaptive according to running status
The optimization database should be updated, improves precision.
Object function requirement in the step (4) is maximum for generated energy,
The switching point of turbine-generator units blade angle, is up to target with efficiency and is formulated in the step (6).
The purpose of blade angular adjustment can be realized in the step (7) taking human as manually or electrically control mode.
With reference to Fig. 1 and 2, by high oil pressure cntrol blade angular adjustment, with reference to the fuzzy mathematics of blade angle Adjustable calculation
Model, so that the tune propeller type water turbine group of dull section, possesses the regulatory function of Kaplan turbine, water turbine set is not
With under operating condition, dynamic regulation is carried out to blade, realizes unit under different operating conditions, keep obtaining higher water
Can transformation efficiency.
The above disclosed right for being only the preferred embodiments of the present invention, the present invention can not being limited with this certainly
Scope, therefore the equivalent variations made according to scope of the present invention patent, still belong to the scope that the present invention is covered.
Claims (3)
1. a kind of electro-hydraulic adjusting method of blade of the high oil pressure cntrol hydraulic turbine, in hydraulic turbine blades angular adjustment control system, adopt
Blade electrohydraulic control equipment is controlled with high oil pressure speed regulator, passes through the fuzzy mathematical model computational methods of blade angle, water wheels hair
Group of motors carries out dynamic regulation control under different operating conditions, to blade angle, adjusts to suitable blade angle and runs, its
It is characterised by, comprises the following steps：
(1) database of rotary wheel of water turbine model combined characteristic is established；
(2) rotary wheel of water turbine model combined characteristic is imported into database；
(3) power station diurnal courses amount sequence and head data all the year round are imported；
(4) fuzzy mathematical model of blade angle regulating calculation is established, is trained by data, model meets enough accuracy requirement；
(5) using blade angle beta as parameter to be asked, the hydrographic data of combining step (3) importing, establish using efficiency eta as intermediate variable,
Optimized model using annual electricity generating capacity E as maximum target function, according to object function and safety and stability restrictive condition, calculated using optimization
Method, try to achieve blade angle
(6) real-time working condition parameter of online acquisition turbine-generator units operation：Net water head H, unit quote flow Q so that it is determined that
The switching point of blade angle；
(7), in case of a dynamic basis, can be taking human as manually or electrically using the servomotor of high oil pressure speed regulator control runner blade
Control mode, make the hydraulic oil blade regulation electro-hydraulic actuator motion positioned at generator side, the corner of blade is adjusted, when reaching
After the corner needed, input is mechanically or hydraulically locked, and blade is fixed, described fuzzy so as to realize the purpose of blade angular adjustment
Mathematical modeling is：
In above-mentioned fuzzy mathematical model：
I is blade stepping number；
ε is convergence precision；
EiFor in specific hydrologic process, blade is divided into maximum generating watt during i shelves；
β is blade angle；
H (t) is t head；
Q (t) is t flow；
Q11For unit discharge of hydraulic turbine；
n11For unit speed of hydraulic turbine；
η(Q11,H11, β) and it is the efficiency that operating point is corresponded to when blade angle is β；
DiWhen being divided into i shelves for blade, the set of all i blade angle combinations compositions；
{β1,β2,…βiIt is the combination that i blade angle is formed；
αβminWhen for blade angle being β, the minimum angles of stator；
αβmaxWhen for blade angle being β, the maximum angle of stator；
αβWhen for blade angle being β, the angle of stator.
2. the electro-hydraulic adjusting method of blade of the high oil pressure cntrol hydraulic turbine as claimed in claim 1, it is characterised in that blade is run
The regulating calculation method of angle, including the step (1), (2), (3), (4), (5), (6), fuzzy number described in its step (4)
Model is learned using having self-learning function neural network model, according to running status, continuous adaptive updates optimize database, carry
High accuracy；Object function requirement in the step (5) is maximum for annual electricity generating capacity；Hydrogenerator in the step (6)
The switching point of group blade angle, is up to target with efficiency and is formulated.
3. the electro-hydraulic adjusting method of blade of the high oil pressure cntrol hydraulic turbine as claimed in claim 1, it is characterised in that including for
The control system of hydraulic turbine blades angle is adjusted, the control system is calculated by the fuzzy mathematical model, to hydraulic generator
Under unit difference operating condition, blade angle carries out dynamic regulation control, adjusts to the blade angle operation calculated.
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| CN201510209569.3A CN104879270B (en) | 2014-03-29 | 2014-03-29 | The electro-hydraulic adjusting method of blade and device of the high oil pressure cntrol hydraulic turbine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410124510.XA CN103939273B (en) | 2014-03-29 | 2014-03-29 | Blade electro-hydraulic adjusting method and device for high-oil-pressure control water turbine |
| CN201510209569.3A CN104879270B (en) | 2014-03-29 | 2014-03-29 | The electro-hydraulic adjusting method of blade and device of the high oil pressure cntrol hydraulic turbine |
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| CN201410124510.XA Division CN103939273B (en) | 2014-03-29 | 2014-03-29 | Blade electro-hydraulic adjusting method and device for high-oil-pressure control water turbine |
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| CN201510209569.3A Active CN104879270B (en) | 2014-03-29 | 2014-03-29 | The electro-hydraulic adjusting method of blade and device of the high oil pressure cntrol hydraulic turbine |
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| WO2013030164A2 (en) * | 2011-08-26 | 2013-03-07 | National University Of Ireland | Wave energy converters |
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| CN203035444U (en) * | 2012-11-20 | 2013-07-03 | 天津市科音自控设备有限公司 | Paddle control device with independent oil supply system |
| CN103122823B (en) * | 2013-03-04 | 2015-12-02 | 金文奎 | Adjust structure can be driven in hydraulic turbine blades |
| CN103157976B (en) * | 2013-03-20 | 2015-09-02 | 湖南五凌电力工程有限公司 | Hydraulic turbine blades spacing adjustment measuring method and line positioner thereof |
| CN103306886B (en) * | 2013-05-29 | 2016-03-30 | 郑程遥 | A kind of population parameter adjustment control method of turbine-generator units |
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2014
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| CN103939273A (en) | 2014-07-23 |
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