CN209195585U - A kind of system for handling power station removal of load - Google Patents
A kind of system for handling power station removal of load Download PDFInfo
- Publication number
- CN209195585U CN209195585U CN201821597094.5U CN201821597094U CN209195585U CN 209195585 U CN209195585 U CN 209195585U CN 201821597094 U CN201821597094 U CN 201821597094U CN 209195585 U CN209195585 U CN 209195585U
- Authority
- CN
- China
- Prior art keywords
- guide vane
- load
- gate
- power station
- draft tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
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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
- 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
Abstract
The utility model provides a kind of system for handling power station removal of load, it is related to hydraulic engineering technical field, it includes two Hydropower Plants and delay controller parallel with one another being arranged between upper storage reservoir and lower storage reservoir, and every group of Hydropower Plant includes ball valve, the hydraulic turbine and the draft tube for being from upstream to downstream direction and setting gradually；Gate is equipped between the hydraulic turbine and draft tube, gate is connected with the guide vane of the hydraulic turbine by linkage, and two hydraulic turbines of two groups of Hydropower Plants are connected with delay controller, the successively opening and closing of guide vane of the delay controller to control two hydraulic turbines.The system for handling power station removal of load of the application reduces the current gradient of water flow in tail water pipeline by the time-delay closing between the linkage closing of gate and guide vane in advance, to improve the draft tube import minimum pressure due to caused by guide vane closing.The utility model is particularly suitable under successive load rejection operating condition, can largely improve draft tube import minimum pressure.
Description
Technical field
The utility model relates to hydraulic engineering technical fields, in particular to a kind of for handling power station removal of load
System.
Background technique
In power station or hydroenergy storage station, when accident, which occurs, for unit needs emergency shutdown removal of load, if unit guide vane
Closing comparatively fast can then reduce generating unit speed climbing, but will increase spiral case end maximum water pressure and reduce draft tube import minimum
Water pressure, and then to will lead to generating unit speed climbing larger when guide vane closes slower.Therefore generating unit speed climbing and spiral case end
End maximum pressure and draft tube import minimum water pressure are a pair of conflicting amounts, can not be met simultaneously in some cases.
If draft tube import internal water pressure is too small, which is easy to appear column separation phenomenon, produces to the safe and stable operation of unit
Raw adverse effect.It is even more serious for an above-mentioned phenomenon of hole multi-unit electric power station, especially when successive load rejection occurs.For conventional electricity
It stands, when successive load rejection accident occurs, the closing of first removal of load unit guide vane will lead to its inflow-rate of water turbine and be gradually reduced, and same
It then can inflow-rate of water turbine increase in the Hydraulic unit non-removal of load unit short time.If also got rid of in a certain unit of unfavorable moment negative
Lotus accident changes greatly current gradient in draft tube, causes draft tube import compared with low pressure since the unit inflow-rate of water turbine is larger
The appearance of power threatens tail water discharge and unit safety.
Utility model content
The utility model discloses a kind of systems for handling power station removal of load, it is intended to improve draft tube import minimum pressure
The problem of power.
The utility model uses following scheme:
A kind of system for handling power station removal of load, mutually simultaneously including be arranged between upper storage reservoir and lower storage reservoir two
The Hydropower Plant and delay controller of connection, Hydropower Plant described in every group include being from upstream to downstream direction to set gradually
Ball valve, the hydraulic turbine and draft tube；Gate, the gate and the water wheels are equipped between the hydraulic turbine and the draft tube
The guide vane of machine is connected by linkage, and two hydraulic turbines of Hydropower Plant described in two groups are connected with delay controller
It connects, the successively opening and closing of guide vane of the delay controller to control two hydraulic turbines.
As a further improvement, the linkage is respectively connected to the guide vane and the gate of the hydraulic turbine, it can
While the guide vanes of water turbine is closed, close the gate linkage.
As a further improvement, the delay controller is set between two hydraulic turbines, and respectively with two institutes
The guide vane connection of the hydraulic turbine is stated, the delay controller can be when the guide vane of the wherein hydraulic turbine be closed, and control is another
The guide vane delay of one hydraulic turbine is closed after a certain period of time.
As a further improvement, the distributor closing law of two hydraulic turbines is 1/20s.
As a further improvement, the input end of the draft tube is connected to the gate.
As a further improvement, the distance of upper storage reservoir to the ball valve is 1000-1300m, the gate to lower storage reservoir
Distance is 5000-5700m, and the distance of the draft tube import to the gate is 100-120m.
As a further improvement, the pressure regulation for reducing surge pressure is arranged between the Hydropower Plant and lower storage reservoir
Room.
By using above-mentioned technical proposal, the utility model can obtain following technical effect:
The system for handling power station removal of load of the application closes co- controlling by guide vanes of water turbine and gate linkage
The process of load rejection, while being connected between the guide vanes of water turbine of two groups of Hydropower Plants parallel with one another by delay controller
It connects, and then controls the timing closing of guide vane.Time-delay closing between the linkage closing of gate and guide vane, reduces tail water pipeline in advance
The current gradient of interior water flow, to improve the draft tube import minimum pressure due to caused by guide vane closing.The utility model is outstanding
It is suitable for capable of largely improving draft tube import minimum pressure under successive load rejection operating condition.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the system for handling power station removal of load of the utility model embodiment；
Fig. 2 is the draft tube inlet pressure curve graph of wherein one group of Hydropower Plant；
Fig. 3 is the draft tube inlet pressure curve graph of another group of Hydropower Plant.
Icon: 1- Hydropower Plant；11- ball valve；The 12- hydraulic turbine；13- draft tube；14- gate；15- linkage；2-
Delay controller；3- surge-chamber.
Specific embodiment
It is practical below in conjunction with this to keep the purposes, technical schemes and advantages of the utility model embodiment clearer
The technical solution in the utility model embodiment is clearly and completely described in attached drawing in novel embodiment.It is aobvious
So, described embodiment is a part of embodiment of the utility model, rather than whole embodiments.It is practical based on this
Embodiment in novel, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment is fallen within the protection scope of the utility model.Therefore, the implementation to the utility model provided in the accompanying drawings below
The detailed description of mode is not intended to limit the range of claimed invention, but is merely representative of the utility model
Selected embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making creative labor
Every other embodiment obtained under the premise of dynamic, fall within the protection scope of the utility model.
In conjunction with Fig. 1, present embodiments provide a kind of system for handling power station removal of load, including setting upper storage reservoir with
Two Hydropower Plants 1 and delay controller 2 parallel with one another between lower storage reservoir.Every group of Hydropower Plant 1 include from
On swim over to ball valve 11, the hydraulic turbine 12 and draft tube 13 that downstream direction is set gradually.
Further, gate 14,13 inlet communication of draft tube to gate 14 are equipped between the hydraulic turbine 12 and draft tube 13.Lock
Door 14 is connected with the guide vane of the hydraulic turbine 12 by linkage 15.Linkage 15 be respectively connected to the guide vane of the hydraulic turbine 12 with
Gate 14, can be while 12 guide vane of the hydraulic turbine be closed, so that the linkage of gate 14 is closed.Preferably, linkage 15 can be with
It is existing linked switch, is connected between guide vane and gate 14.When guide vane is closed, triggering linked switch closure, so that lock
Door 14 is closed after being powered, to realize that the linkage between guide vane and gate 14 is closed.The triggering of linked switch and linked switch
Unlatching so that gate 14 closing belong to existing conventional technical means, details are not described herein.
Specifically, two hydraulic turbines 12 of two groups of Hydropower Plants 1 are connected with delay controller 2, delay controller 2
To control the successively opening and closing of the guide vane of two hydraulic turbines 12.Delay controller 2 is set between two hydraulic turbines 12, and respectively
It is connect with the guide vane of two hydraulic turbines 12.Delay controller 2 can be when the guide vane of a wherein hydraulic turbine 12 be closed, and control is another
The guide vane delay of one hydraulic turbine 12 is closed after a certain period of time.The delays time to control time of delay controller 2 is set as 8-10s,
In the guide vane of hydraulic turbine 12 while close, delay controller 2 starts timing and controls another hydraulic turbine after 8-10s
12 guide vane is closed.It is understood that the optional existing model TB38809KC7S's on the market of delay controller 2 prolongs
When time switch, to realize the time-delay closing between guide vane.In turn, it is closed by 12 guide vane of the hydraulic turbine and the linkage of gate 14 common
The process of load rejection is controlled, while passing through delay between 12 guide vane of the hydraulic turbine of two groups of Hydropower Plants 1 parallel with one another
Controller 2 connects, and then controls the timing closing of guide vane.Time-delay closing between the linkage closing of gate 14 and guide vane, in advance
The current gradient of water flow in tail water pipeline is reduced, to improve the 13 import minimum pressure of draft tube due to caused by guide vane closing
Power.The utility model is particularly suitable under successive load rejection operating condition, can largely improve 13 import minimum pressure of draft tube
Power.
In detail, the distributor closing law of the hydraulic turbine is 1/20s.Wherein, total aperture indicates that maximum is opened with relative opening degree
Degree is that 1,1/20s indicates that guide vane opening variation slope is 1/20.After wherein a guide vane closes 8-10s, another guide vane is with 1/20s's
Closing Law is closed.
Further, in this embodiment the distance of upper storage reservoir to ball valve 11 is 1000-1300m, gate 14 to lower storage reservoir
Distance is 5000-5700m, and the distance of 13 import of draft tube to gate 14 is 100-120m.It ensure that Hydropower Plant 1 and upper water
Rational deployment setting between library and lower storage reservoir, realizes optimal water station electricity generation system.And between Hydropower Plant 1 and lower storage reservoir
It is provided with the surge-chamber 3 for reducing surge pressure.Surge-chamber 3 has pressure penstock or underground powerhouse to run-of-river power station
Reduce surge pressure compared with having with pressure tail water road, and improve the effect of unit service condition.
Fig. 2-3 is please referred to, the abscissa in figure is the time (s), and ordinate is the pressure (MPa) of draft tube import.Dotted line
For the draft tube inlet pressure curve before improvement, solid line is that the guide vane that the utility model uses and gate linkage close and cooperate guide vane
Between time-delay closing after draft tube inlet pressure curve graph.Fig. 2 and Fig. 3 be respectively draft tube in two groups of Hydropower Plants into
Mouth pressure curve.It can be apparent from figure, the minimum pressure of block curve is higher than the minimum pressure of dashed curve.I.e. this is practical new
Guide vane used by type and gate linkage close the time-delay closing between cooperation guide vane, and it is minimum to effectively raise draft tube import
Pressure, practical application effect are significant.
Above are merely preferred embodiments of the utility model, the protection scope of the utility model is not limited merely to above-mentioned
Embodiment, technical solution belonging to the idea of the present invention belong to the protection scope of the utility model.
Claims (7)
1. a kind of system for handling power station removal of load, which is characterized in that including being arranged between upper storage reservoir and lower storage reservoir
Two Hydropower Plants and delay controller parallel with one another, Hydropower Plant described in every group includes being from upstream to downstream side
To the ball valve, the hydraulic turbine and draft tube set gradually；Gate, the gate are equipped between the hydraulic turbine and the draft tube
It is connected with the guide vane of the hydraulic turbine by linkage, two hydraulic turbines of Hydropower Plant described in two groups are controlled with delay
Device processed is connected, the successively opening and closing of guide vane of the delay controller to control two hydraulic turbines.
2. the system according to claim 1 for handling power station removal of load, which is characterized in that the linkage difference
It is connected to the guide vane and the gate of the hydraulic turbine, the gate can be made to join while the guide vanes of water turbine is closed
It is dynamic to close.
3. the system according to claim 1 for handling power station removal of load, which is characterized in that the delay controller is set
It is placed between two hydraulic turbines, and connect respectively with the guide vane of two hydraulic turbines, the delay controller can be
When the guide vane of one of them hydraulic turbine is closed, the guide vane delay for controlling another hydraulic turbine is closed after a certain period of time.
4. the system according to claim 1 for handling power station removal of load, which is characterized in that two hydraulic turbines
Distributor closing law is 1/20s.
5. the system according to claim 1 for handling power station removal of load, which is characterized in that the import of the draft tube
End is connected to the gate.
6. the system according to claim 1 for handling power station removal of load, which is characterized in that upper storage reservoir to the ball valve
Distance be 1000-1300m, the distance of the gate to lower storage reservoir is 5000-5700m, the draft tube import to the lock
The distance of door is 100-120m.
7. the system according to claim 1 for handling power station removal of load, which is characterized in that the Hydropower Plant with
Surge-chamber for reducing surge pressure is set between lower storage reservoir.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821597094.5U CN209195585U (en) | 2018-09-28 | 2018-09-28 | A kind of system for handling power station removal of load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821597094.5U CN209195585U (en) | 2018-09-28 | 2018-09-28 | A kind of system for handling power station removal of load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209195585U true CN209195585U (en) | 2019-08-02 |
Family
ID=67407012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821597094.5U Expired - Fee Related CN209195585U (en) | 2018-09-28 | 2018-09-28 | A kind of system for handling power station removal of load |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209195585U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113464354A (en) * | 2021-08-13 | 2021-10-01 | 西华大学 | Water turbine control method applied to hydropower station with long pressure water diversion channel |
-
2018
- 2018-09-28 CN CN201821597094.5U patent/CN209195585U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113464354A (en) * | 2021-08-13 | 2021-10-01 | 西华大学 | Water turbine control method applied to hydropower station with long pressure water diversion channel |
| CN113464354B (en) * | 2021-08-13 | 2023-06-23 | 西华大学 | Water turbine control method applied to hydropower station with long pressurized water diversion channel |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190802 Termination date: 20210928 |
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| CF01 | Termination of patent right due to non-payment of annual fee |