CN104775983B - Pump-storage generator stator time-delay closing system - Google Patents
Pump-storage generator stator time-delay closing system Download PDFInfo
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- CN104775983B CN104775983B CN201410015013.6A CN201410015013A CN104775983B CN 104775983 B CN104775983 B CN 104775983B CN 201410015013 A CN201410015013 A CN 201410015013A CN 104775983 B CN104775983 B CN 104775983B
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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
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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- Control Of Water Turbines (AREA)
Abstract
The present invention relates to hydraulic generator governing system technical field，Specifically related to pump-storage generator stator time-delay closing system，Including inserted valve、First solenoid directional control valve and pilot operated directional control valve，The A mouths of the inserted valve are connected with the distributing valve of speed regulator，The B mouths of the inserted valve are connected with servomotor，The A mouths of first solenoid directional control valve are connected with the X2 mouths of the pilot operated directional control valve，The P mouths connection hydraulic oil source and the X1 mouths and B mouths of the pilot operated directional control valve of first solenoid directional control valve，The P mouths of the pilot operated directional control valve are connected with the X mouths of the inserted valve，Control area of the control area of the X2 mouths of the pilot operated directional control valve more than X1 mouths，The A mouths connection oil sump tank of the T mouths and the pilot operated directional control valve of first solenoid directional control valve，First electric magnet and the speed regulator of first solenoid directional control valve is electrically connected with monitoring system.The present invention can realize the characteristic that pump-storage generator stator is closed.
Description
Technical field
The present invention relates to hydraulic generator governing system technical field, and in particular to pump-storage generator stator time delay
Closing system.
Background technology
At present, the governing system of conventional hydraulic generator includes speed regulator electric device, hydraulic means, oil pressure dress
Put, the automation equipment such as speed measuring device and emergency distributing valve, two sections of shutoff valves.Wherein, speed regulator electric device, hydraulic pressure dress
Put, oil gear, speed measuring device are that all governing systems must be matched somebody with somebody, emergency distributing valve is configured according to actual requirement, two
Section shutoff device then determines whether configuration according to the regulation assurance calculation result of the hydraulic turbine.Two sections of shutoff devices work in the unit
With being：Stator is closed to by setting aperture with the prestissimo for requiring during load rejection, control generating unit speed is less than and allows
Value, then with the speed slowly closing stator that specifies to fully closed, it is ensured that diversion pipe pressure is less than setting, it is ensured that unit and whole
The safety in power station.
With economic and science and technology development, for the unnecessary electric energy by network load when low, it is changed into electrical network peak
The high value electric energy in period, hydroenergy storage station become the main study subject for solving this problem.
Water wheels in the governing system of pump-storage generator, in the characteristic of pump turbine runner and conventional water turbine set
Machine runner is very different, and its closing property is also different from conventional water turbine set.In load rejection, conventional water turbine set
Closing require it is that first quick corner position of closing is closed again slowly to fully closed, and the closing mode of pump-storage generator just with this phase
Instead, in removal of load, pump-storage generator needs first to be not related to or after the slowly closing some time, then the prestissimo to allow
Close to fully closed.Otherwise be likely to occur aqueduct be in charge of place pressure value beyond permissible value and there is accident.The two of traditional water turbine set
Section shutoff device cannot realize this closing property requirement of pump-storage generator, and due to pump-storage generator itself and take out
The characteristic of the aspects such as water storage station unit arrangement, is higher than conventional water to the reliability requirement of pump-storage generator Closing Law
Wheel unit.In addition, in pump-storage generator, it is limited that during removal of load, the speed of unit rises, not over permissible value, but
It is that the negative pressure that aqueduct hydraulic pressure rises and draft tube is produced but has more than the possibility of setting, such as the two pressure values are exceeded,
It is possible to power station bringing on a disaster property consequence.Therefore, during pump-storage generator removal of load, time-delay mechanism reliable must put into, and not permit
Perhaps fail.
The existing pump-storage generator stator time-delay closing device for putting into operation uses mechanical-hydraulic control mode, is
System is extremely complex, and components and parts are more, adjusts making time point by throttle orifice, and adjusting range is little and difficult.The trigger of input is
Purely mechanic overspeed protection device, its action must be carried out whole with rotating speed rising value when unit gets rid of 100% load under rated head
Fixed, when the unit not removal of load under full load situation, its maximum (top) speed rising does not reach mechanic over speed protection device setting valve,
Time-delay closing device cannot then put into, and, start to rotating speed to reach setting valve triggering overspeed protection device of overrunning from removal of load
It is spaced for some time, during this period of time stator has pressed maximal rate closing, these all have hydraulic pressure and endanger beyond setting
Danger.
So, need a kind of pump-storage generator stator time-delay closing system that reliably can be put at present badly.
The content of the invention
It is an object of the invention to：Promptly and accurately can not throw for existing pump-storage generator stator time-delay closing system
Enter and so that there is the deficiency of potential safety hazard in pump-storage generator, there is provided can promptly and accurately and reliable input water-storage machine
Group stator time-delay closing system.
To achieve these goals, the technical solution used in the present invention is：
Pump-storage generator stator time-delay closing hydraulic system, including inserted valve, the first solenoid directional control valve and liquid controlled reversing
Valve, the A mouths of the inserted valve are connected with the distributing valve of speed regulator, and the B mouths of the inserted valve are connected with servomotor, and described first is electric
The A mouths of magnetic reversal valve are connected with the X2 mouths of the pilot operated directional control valve, the P mouths of first solenoid directional control valve connection hydraulic oil source with
And the X1 mouths and B mouths of the pilot operated directional control valve, the P mouths of the pilot operated directional control valve are connected with the X mouths of the inserted valve, the hydraulic control
Control area of the control area of the X2 mouths of reversal valve more than X1 mouths, the T mouths of first solenoid directional control valve and the hydraulic control are changed
To the A mouths connection oil sump tank of valve, first electric magnet and the speed regulator of first solenoid directional control valve are electrically connected with monitoring system
Connect, when the monitoring system sends input signal, the A mouths of the inserted valve and B mouths disconnect, and the monitoring system sends and exits letter
Number when, the A mouths of the inserted valve are connected with B mouths.When pump-storage generator runs well, the first electric magnet is not excitatory, hydraulic pressure
Oil sources enters into the X2 mouths of pilot operated directional control valve after the first solenoid directional control valve, and X1 mouths and the hydraulic oil source of pilot operated directional control valve connect
Connect, as the control area of the X2 mouths of pilot operated directional control valve is more than the control area of X1 mouths, the P mouths of pilot operated directional control valve are connected with A mouths,
The X mouths of inserted valve, the P mouths of pilot operated directional control valve and A mouths and oil sump tank are connected so that the A mouths of inserted valve are connected with B mouths, and then are made
Obtain in pump-storage generator normal work, connect between the distributing valve and servomotor of speed regulator so that speed regulator can pass through
Control servomotor to control the action of stator；When pump-storage generator removal of load, monitoring system is simultaneously to speed regulator and first
Solenoid directional control valve sends removal of load signal, and speed regulator sends the signal of stator cut out by distributing valve to servomotor, but now,
First solenoid directional control valve also receives the signal of removal of load, and the first electric magnet of the first solenoid directional control valve is excitatory, the first electromagnetic switch
The A mouths of valve are connected with T mouths and are simultaneously connected with the X2 mouths of pilot operated directional control valve, the hydraulic oil of the control intracavity of the X2 mouths of pilot operated directional control valve to
Oil return tank drainback, the valve element movement of pilot operated directional control valve, the B mouths and P mouths for making pilot operated directional control valve are connected, and the hydraulic oil of hydraulic oil source leads to
Cross pilot operated directional control valve B mouths and P mouths enter into inserted valve X mouths control intracavity, the A mouths of inserted valve and B mouths disconnect, so,
Now speed regulator can not control stator and cut out immediately；When monitoring system sends exit instruction to the first solenoid directional control valve, the
First electric magnet of one solenoid directional control valve is not excitatory, and the A mouths for controlling inserted valve are connected with B mouths, and then causes pump-storage generator
Stator quick closedown；At work, main valve is made using inserted valve, as inserted valve simple structure, through-current capability are big, pressure is damaged
Mistake is little, be difficult hair fastener so that the pump-storage generator stator time-delay closing system of the present invention can be put in time, electric using first
Magnetic reversal valve makees control valve, the first solenoid directional control valve output signal is amplified with pilot operated directional control valve to operate inserting valve actuation
Make so that the pump-storage generator stator time-delay closing system of the present invention can reliably put in time and exit.
As the preferred version of the present invention, between the A mouths and B mouths of the inserted valve, choke valve, the choke valve are provided with
One end be connected with the A mouths of the inserted valve, the other end of the choke valve is connected with the B mouths of the inserted valve.Work as the present invention
Pump-storage generator stator time-delay closing system put into when, the A mouths and B mouths of inserted valve are disconnected, now, due in inserted valve
A mouths and B mouths between choke valve is set so that, be still switched between the distributing valve and servomotor of speed regulator, only, by
The flow-reduction of oil circuit between the presence of choke valve, the distributing valve and servomotor of speed regulator, stator are slowly closed, so as to
The stator time-delay closing system of the present invention is enabled to realize the closing property of pump-storage generator stator；Further, since inserting
Choke valve is set between the A mouths and B mouths of dress valve, when stator time-delay closing system can not be exited due to breaking down, and makes to lead
Leaf cannot quick closedown when, stator still can be slow complete in the presence of the distributing valve of speed regulator, choke valve and servomotor
Contract fully, it is ensured that the security reliability of the present invention.
As the preferred version of the present invention, also go here and there on the oil circuit between first solenoid directional control valve and the hydraulic oil source
The second solenoid directional control valve is associated with, the P mouths of second solenoid directional control valve are connected with the hydraulic oil source, second electromagnetic switch
The A mouths of valve are connected with the P mouths of first solenoid directional control valve, and the T mouths of second solenoid directional control valve are connected with the oil sump tank,
Second electric magnet of second solenoid directional control valve is electrically connected with the monitoring system.In the first electromagnetism solenoid directional control valve and hydraulic pressure
Between oil sources, series connection is such as the second solenoid directional control valve, as the first solenoid directional control valve and the second solenoid directional control valve are all normal open valves, institute
With when one of solenoid directional control valve breaks down can not be put in time, as long as another solenoid directional control valve can be thrown in time
Enter, the stator time-delay closing system of the present invention still timely can put into, so as to ensure that the stator time-delay closing of the present invention
System reliably can put into.
As the preferred version of the present invention, the oil circuit between the P mouths and the hydraulic oil source of second solenoid directional control valve
On be provided with stop valve, one end of the stop valve is connected with the hydraulic oil source, the other end of the stop valve and described
The P mouths connection of two solenoid directional control valves.By stop valve, the pump-storage generator stator of the convenient present invention are arranged at hydraulic oil source
Installation, maintenance and the maintenance of time-delay closing system.
Used as the preferred version of the present invention, the X mouths of the inserted valve are also associated with pressure switch.The X mouths of inserted valve
During control intracavity feed pressure oil, pressure switch is entered by X mouths, the spring in compression pressure relay make position switch a,
C is connected, and sends corresponding signal to monitoring system, represents the throwing of the pump-storage generator stator time-delay closing system of the present invention
Enter, when the control cavity pressure oil of the X mouths of inserted valve flows out, the pressure oil in pressure switch also flows out, pressure switch
Interior switch a, b is connected, exiting for the pump-storage generator stator time-delay closing system of the expression present invention, is facilitated to the present invention
Pump-storage generator stator time-delay closing system input and the monitoring exited.
As the preferred version of the present invention, between the stop valve and the X1 mouths of the pilot operated directional control valve, pressure measurement is additionally provided with
Joint.On oil circuit between the X1 mouths of stop valve and pilot operated directional control valve, pressure measuring tie-in is set, can be conveniently by pressure measuring tie-in
Ground detection pressure oil-source pressure.
In sum, as a result of above-mentioned technical proposal, the invention has the beneficial effects as follows：
1st, main valve is made using inserted valve, the first solenoid directional control valve makees control valve, with pilot operated directional control valve to the first electromagnetic switch
Valve output signal is amplified to operate inserting valve events so that the pump-storage generator stator time-delay closing system of the present invention
Can reliably put in time and exit；
2nd, choke valve is set between the A mouths and B mouths of inserted valve, when stator time-delay closing system can not due to breaking down
Enough exit, and make stator cannot quick closedown when, stator still can be in the work of the distributing valve of speed regulator, choke valve and servomotor
Slowly completely closed with lower, it is ensured that the security reliability of the present invention；
3rd, choke valve is set between the A mouths and B mouths of inserted valve, when the stator time-delay closing system of the present invention puts into,
Stator is slowly closed, and when the stator time-delay closing system of the present invention is exited, the quick and complete closing of stator is realized and drawn water
The closing property of accumulation of energy unit stator；
The 4th, the solenoid directional control valve of two series connection is set, can not be put in time when one of solenoid directional control valve breaks down
When, as long as another solenoid directional control valve can be put in time, the stator time-delay closing system of the present invention still timely can put into,
Ensure that the stator time-delay closing system of the present invention reliably can put into.
Description of the drawings
Fig. 1 is the hydraulic scheme of the present invention,
Labelling in figure：1- inserted valves, the first solenoid directional control valves of 2-, 3- pilot operated directional control valves, 4- oil sump tanks, the first electromagnetism of 5-
Ferrum, 6- choke valves, the second solenoid directional control valves of 7-, the second electric magnet of 8-, 9- stop valves, 10- pressure switches, 11- pressure measuring tie-ins.
Specific embodiment
Below in conjunction with the accompanying drawings, the present invention is described in detail.
In order that the objects, technical solutions and advantages of the present invention become more apparent, it is below in conjunction with drawings and Examples, right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
Pump-storage generator stator time-delay closing hydraulic system as shown in Figure 1, including inserted valve 1, the first electromagnetic switch
Valve 2 and pilot operated directional control valve 3, the A mouths of the inserted valve 1 are connected with the distributing valve of speed regulator, the B mouths of the inserted valve 1 and relay
Device connects, and the A mouths of first solenoid directional control valve 2 are connected with the X2 mouths of the pilot operated directional control valve 3, first solenoid directional control valve
2 P mouths connection hydraulic oil source and the X1 mouths and B mouths of the pilot operated directional control valve 3, the P mouths of the pilot operated directional control valve 3 are inserted with described
The X mouths connection of dress valve 1, the control area of the X2 mouths of the pilot operated directional control valve 3 are more than the control area of X1 mouths, first electromagnetism
The A mouths connection oil sump tank 4 of the T mouths and the pilot operated directional control valve 3 of reversal valve 2, the first electric magnet 5 of first solenoid directional control valve
Electrically connect with monitoring system with the speed regulator, when the monitoring system sends input signal, the A mouths and B mouths of the inserted valve 1
Disconnect, the monitoring system is sent when exiting signal, and the A mouths of the inserted valve 1 are connected with B mouths.When pump-storage generator it is normal
During operating, the first electric magnet 5 is not excitatory, and hydraulic oil source enters into the X2 of pilot operated directional control valve 3 after the first solenoid directional control valve 2
Mouthful, the X1 mouths of pilot operated directional control valve 3 are connected with hydraulic oil source, as the control area of the X2 mouths of pilot operated directional control valve 3 is more than X1 mouths
Control area, the P mouths of pilot operated directional control valve 3 are connected with A mouths, the X mouths of inserted valve 1, the P mouths of pilot operated directional control valve 3 and A mouths and oil sump tank
4 connect so that the A mouths of inserted valve 1 are connected with B mouths, and then so that in pump-storage generator normal work, speed regulator with pressure
Connect between valve and servomotor so that speed regulator can control the action of stator by controlling servomotor；When water-storage machine
During group removal of load, monitoring system sends removal of load signal to speed regulator and the first solenoid directional control valve 2 simultaneously, and speed regulator is by with pressure
Valve sends the signal of stator cut out to servomotor, but now, the first solenoid directional control valve 2 also receives the signal of removal of load, and first
First electric magnet 5 of solenoid directional control valve 2 is excitatory, and the A mouths of the first solenoid directional control valve 2 are connected with T mouths and the X2 with pilot operated directional control valve 3
Mouth is connected, and to 4 oil return of oil sump tank, the valve element of pilot operated directional control valve 3 is moved the hydraulic oil of the control intracavity of the X2 mouths of pilot operated directional control valve 3
Dynamic, the B mouths and P mouths for making pilot operated directional control valve 3 is connected, and the hydraulic oil of hydraulic oil source is entered by the B mouths and P mouths of pilot operated directional control valve 3
To the control intracavity of the X mouths of inserted valve 1, the A mouths of inserted valve 1 and the disconnection of B mouths, so, now speed regulator can not control stator
Close immediately；When monitoring system sends exit instruction to the first solenoid directional control valve 2, the first electromagnetism of the first solenoid directional control valve 2
Ferrum 5 is not excitatory, and the A mouths for controlling inserted valve 1 are connected with B mouths, and then causes the stator quick closedown of pump-storage generator；In work
In, main valve is made using inserted valve 1, due to 1 simple structure of inserted valve, through-current capability is big, the pressure loss is little, be difficult hair fastener so that
The pump-storage generator stator time-delay closing system of the present invention can be put in time, make control valve using the first solenoid directional control valve 2,
It is amplified to operate 1 action of inserted valve with 3 pairs of 2 output signals of the first solenoid directional control valve of pilot operated directional control valve so that the present invention's
Pump-storage generator stator time-delay closing system can reliably put in time and exit.
As the preferred version of the present invention, between the A mouths and B mouths of the inserted valve 1, choke valve 6, the throttling are provided with
One end of valve 6 is connected with the A mouths of the inserted valve 1, and the other end of the choke valve 6 is connected with the B mouths of the inserted valve 1.When
When the pump-storage generator stator time-delay closing system of the present invention puts into, the A mouths and B mouths of inserted valve 1 are disconnected, now, due to
Choke valve 6 is set between the A mouths and B mouths of inserted valve 1 so that, still it is switched between the distributing valve and servomotor of speed regulator,
Only, due to the presence of choke valve 6, the flow-reduction of oil circuit between the distributing valve and servomotor of speed regulator, stator are slow
Closing so that the stator time-delay closing system of the present invention can realize the closing property of pump-storage generator stator；Separately
Outward, as choke valve 6 is arranged between the A mouths and B mouths of inserted valve 1, when stator time-delay closing system can not due to breaking down
Enough exit, and make stator cannot quick closedown when, stator still can be in the distributing valve of speed regulator, choke valve 6 and servomotor
Slowly completely close under effect, it is ensured that the security reliability of the present invention.
As the preferred version of the present invention, on the oil circuit between first solenoid directional control valve 2 and the hydraulic oil source also
The second solenoid directional control valve 7 is in series with, the P mouths of second solenoid directional control valve 7 are connected with the hydraulic oil source, second electromagnetism
The A mouths of reversal valve 7 are connected with the P mouths of first solenoid directional control valve 2, T mouths and the oil return of second solenoid directional control valve 7
Case 4 connects, and the second electric magnet 8 of second solenoid directional control valve 7 is electrically connected with the monitoring system.Change in the first electromagnetism electromagnetism
To such as the second solenoid directional control valve 7 of connecting between valve 2 and hydraulic oil source, due to the first solenoid directional control valve 2 and the second solenoid directional control valve 7
All it is normal open valve, so, when one of solenoid directional control valve breaks down can not be put in time, as long as another electromagnetic switch
Valve can be put in time, and the stator time-delay closing system of the present invention still timely can put into, so as to ensure that the present invention's
Stator time-delay closing system reliably can put into.
As the preferred version of the present invention, the oil circuit between the P mouths and the hydraulic oil source of second solenoid directional control valve 7
On be provided with stop valve 9, one end of the stop valve 9 is connected with the hydraulic oil source, the other end of the stop valve 9 with it is described
The P mouths connection of the second solenoid directional control valve 7.By stop valve 9, the pump-storage generator of the convenient present invention are arranged at hydraulic oil source
Installation, maintenance and the maintenance of stator time-delay closing system.
Used as the preferred version of the present invention, the X mouths of the inserted valve 1 are also associated with pressure switch 10, the pressure after
Electrical equipment 10 is electrically connected with the monitoring system.During the control intracavity feed pressure oil of the X mouths of inserted valve 1, pressure is entered by X mouths
Relay 10, the spring in compression pressure relay 10 connect position switch a, c, and send corresponding letter to monitoring system
Number, represent the present invention pump-storage generator stator time-delay closing system input, when the control chamber of the X mouths of inserted valve 1 it is intrinsic pressure
When power oil flows out, the pressure oil in pressure switch 10 also flows out, and switch a, the b in pressure switch 10 is connected, and represents this
Exiting for bright pump-storage generator stator time-delay closing system, facilitates the pump-storage generator stator time delay to the present invention and closes
The input for closing system and the monitoring exited.
As the preferred version of the present invention, between the stop valve 9 and the X1 mouths of the pilot operated directional control valve 3, survey is additionally provided with
Crimp head 11.Pressure measuring tie-in 11 is set on the oil circuit between the X1 mouths of stop valve 9 and pilot operated directional control valve 3, by pressure measuring tie-in
11, the pressure oil-source pressure into the present invention can be easily monitored, the security reliability of the present invention is further improve.
All any modification, equivalent and improvement made within the spirit and principles in the present invention etc., should be included in
Within protection scope of the present invention.
Claims (6)
1. pump-storage generator stator time-delay closing hydraulic system, including inserted valve, the first solenoid directional control valve and pilot operated directional control valve,
The A mouths of the inserted valve are connected with the distributing valve of speed regulator, and the B mouths of the inserted valve are connected with servomotor, first electromagnetism
The A mouths of reversal valve are connected with the X2 mouths of the pilot operated directional control valve, the P mouths of first solenoid directional control valve connection hydraulic oil source and
The X1 mouths and B mouths of the pilot operated directional control valve, the P mouths of the pilot operated directional control valve are connected with the X mouths of the inserted valve, and the hydraulic control is changed
It is more than the control area of X1 mouths, the T mouths and the liquid controlled reversing of first solenoid directional control valve to the control area of the X2 mouths of valve
The A mouths connection oil sump tank of valve, first electric magnet and the speed regulator of first solenoid directional control valve are electrically connected with monitoring system,
When the monitoring system sends input signal, the A mouths of the inserted valve and B mouths disconnect, and the monitoring system sends and exits signal
When, the A mouths of the inserted valve are connected with B mouths.
2. pump-storage generator stator time-delay closing hydraulic system according to claim 1, it is characterised in that the inserting
Choke valve is provided between the A mouths and B mouths of valve, one end of the choke valve is connected with the A mouths of the inserted valve, the choke valve
The other end be connected with the B mouths of the inserted valve.
3. pump-storage generator stator time-delay closing hydraulic system according to claim 1 and 2, it is characterised in that described
Second solenoid directional control valve is in series with oil circuit between first solenoid directional control valve and the hydraulic oil source also, second electromagnetism is changed
It is connected to the P mouths of valve with the hydraulic oil source, the P mouths of the A mouths of second solenoid directional control valve and first solenoid directional control valve
Connection, the T mouths of second solenoid directional control valve be connecteds with the oil sump tank, the second electric magnet of second solenoid directional control valve and
The monitoring system electrical connection.
4. pump-storage generator stator time-delay closing hydraulic system according to claim 3, it is characterised in that described second
Be provided with stop valve on oil circuit between the P mouths and the hydraulic oil source of solenoid directional control valve, one end of the stop valve with it is described
Hydraulic oil source connects, and the other end of the stop valve is connected with the P mouths of second solenoid directional control valve.
5. pump-storage generator stator time-delay closing hydraulic system according to claim 4, it is characterised in that the inserting
The X mouths of valve are also associated with pressure switch.
6. pump-storage generator stator time-delay closing hydraulic system according to claim 4, it is characterised in that the cut-off
Pressure measuring tie-in is additionally provided between the X1 mouths of valve and the pilot operated directional control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410015013.6A CN104775983B (en) | 2014-01-14 | 2014-01-14 | Pump-storage generator stator time-delay closing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410015013.6A CN104775983B (en) | 2014-01-14 | 2014-01-14 | Pump-storage generator stator time-delay closing system |
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| CN104775983A CN104775983A (en) | 2015-07-15 |
| CN104775983B true CN104775983B (en) | 2017-04-05 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106438187B (en) * | 2016-08-31 | 2018-08-28 | 清远蓄能发电有限公司 | Working condition control device and its control method in a kind of pump turbine governing system |
| CN109139350B (en) * | 2018-09-29 | 2024-01-26 | 东方电气自动控制工程有限公司 | Overspeed protection and flow control device for pumped storage power station |
| CN110059345B (en) * | 2019-03-08 | 2021-10-15 | 华中科技大学 | Method and system for optimizing successive load shedding shutdown rule of pumped storage unit |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61170300A (en) * | 1985-01-24 | 1986-07-31 | Kansai Electric Power Co Inc:The | Controller of variable speed water wheel generator |
| DE19720700A1 (en) * | 1997-05-16 | 1998-11-19 | Arno Hoeffken | Electrical energy storage method using potential energy |
| CN102042159B (en) * | 2010-11-30 | 2013-03-06 | 国网电力科学研究院 | Stepped closing device capable of adjusting closing rate of pumped storage group |
| CN203348203U (en) * | 2013-07-02 | 2013-12-18 | 山东泰丰液压股份有限公司 | Speed-regulating hydraulic control valve group of large-flow two-way cartridge valve |
| CN103470441B (en) * | 2013-09-22 | 2015-12-30 | 东方电机控制设备有限公司 | The hydraulic pressure installation of a kind of water turbine governing and protective system |
| CN203670089U (en) * | 2014-01-14 | 2014-06-25 | 东方电气集团东方电机有限公司 | Water-pumping energy-storing unit guide vane delaying closing system |
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