CN208106641U - A kind of hydraulic turbine overspeed protection system in the case of DC control supply power loss - Google Patents
A kind of hydraulic turbine overspeed protection system in the case of DC control supply power loss Download PDFInfo
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- CN208106641U CN208106641U CN201820486469.4U CN201820486469U CN208106641U CN 208106641 U CN208106641 U CN 208106641U CN 201820486469 U CN201820486469 U CN 201820486469U CN 208106641 U CN208106641 U CN 208106641U
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- overspeed protection
- turbine
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- power loss
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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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Abstract
The utility model discloses the hydraulic turbine overspeed protection systems in the case of a kind of DC control supply power loss, including double loop power supply, for providing power supply not out of stock；Switching signal is generated for incuding the double wedge part of generator shaft fluted disc in turbine-generator units close to switch；Electrical overspeed protection measure and control device, for according to switching signal judge turbine-generator units generated level-one overrun/second level overruns；Two concatenation electrical overspeed protection hydraulic buttery valves, one of them be used for generate including level-one overrun including water dispenser accident when movement；Another is used for the movement when second level is overrun.The main improvement of the utility model is; double loop power supply, two concatenation electrical overspeed protection hydraulic buttery valve use; and it is rationally utilized close to switch and electrical overspeed protection measure and control device; constitute a kind of new system; to reach in the case where DC control circuit power loss; so that turbine-generator units is obtained effective overspeed protection, improves the purpose of reliability.
Description
Technical field
The utility model belongs to the hydraulic turbine in the case of observation and control technology field more particularly to a kind of DC control supply power loss
Overspeed protection system.
Background technique
Turbine-generator units are the generating sets driven by the hydraulic turbine.Due to the difference of power station natural conditions, water wheels hair
The capacity of motor group and the variation range of revolving speed are very big.The high speed water of usual small hydro turbine and impulse turbine driving
Turbine generator mostly uses horizontal type structure, and large and medium-sized generation speed generator mostly uses vertical structure.Since power station majority is in far
Place from city, it usually needs by powering to the load compared with long power transmission line, therefore, fortune of the electric system to hydrogenerator
Row stability proposes higher requirement：Parameter of electric machine needs carefully select；The rotary inertia of rotor is required larger.So
The external form of hydrogenerator is different from steam turbine generator, its root diameter is big and length is short.Turbine-generator units start, are grid-connected
Required time is shorter, and traffic control is flexible, it is uniquely useful as regulating units and emergency duty other than generally generating electricity
Unit.Up to 800,000 kilowatts, (runner China of the unit of 1,000,000 kilowatts of installed capacitys is for the maximum capacity of turbine-generator units
It succeeds in developing).And in the prior art, in the case where DC control circuit power loss, turbine-generator units cannot get effective mistake
Speed protection, reliability is not high, if not solving the problems, such as this, can affect greatly to the work of turbine-generator units.
Utility model content
The purpose of this utility model is that：A kind of hydraulic turbine overspeed protection system in the case of DC control supply power loss is provided
System, to solve in the prior art in the case where DC control circuit power loss, turbine-generator units cannot effectively overrun guarantor
Shield, the not high technical problem of reliability.
The technical solution adopted in the utility model is as follows：
A kind of hydraulic turbine overspeed protection system in the case of DC control supply power loss, including
Double loop power supply, for being provided not for the overspeed protection system of turbine-generator units in DC control circuit power loss
Power supply out of stock；
Switching signal is generated for incuding the double wedge part of generator shaft fluted disc in turbine-generator units close to switch；
Electrical overspeed protection measure and control device, for judging that turbine-generator units have generated level-one mistake according to switching signal
Speed/second level is overrun；
The electrical overspeed protection hydraulic buttery valve of two concatenations, it includes one that one of them, which is used to generate in turbine-generator units,
Grade overrun including water dispenser accident when, its movement is controlled by the LCU of turbine-generator units；Another is used in turbine-generator units
When generation second level is overrun, its movement is controlled by electrical overspeed protection measure and control device.
It further, is one or two close to switch.
Further, if close switch is two, two are oppositely arranged close to switch, facilitate elimination axis swing and cause
Measurement error.
It further, is inductance approach switch close to switch.
Further, double loop power supply include electric station DC system provide DC control supply and it is rectified after station-service hand over
Galvanic electricity source.
Further, electric station DC system provide DC control supply and it is rectified after station-service AC power source output
For DC24V.
Further, water dispenser accident further includes that accident low oil pressure, level-one master when shutting down that overruns cut with tripping or break pin.
In conclusion by adopting the above-described technical solution, the utility model has the beneficial effects that：
The main improvement of the utility model is, the electrical overspeed protection hydraulic buttery valves of double loop power supply, two concatenations
Use, and be rationally utilized and constitute a kind of new turbine-generator units close to switch and electrical overspeed protection measure and control device
Power loss and overspeed protection system obtain turbine-generator units effectively to reach in the case where DC control circuit power loss
Overspeed protection improves the purpose of reliability.
Detailed description of the invention
Fig. 1 is the overall system structure block diagram of the utility model；
Fig. 2 is the structural relation schematic diagram of electrical overspeed protection measure and control device and generator shaft；
Fig. 3 is the structural schematic diagram of double loop power supply；
Fig. 4 is the structural schematic diagram of the emergency distributing valve hydraulic control system of the utility model.
Specific embodiment
All features disclosed in this specification can be with any other than mutually exclusive feature and/or step
Mode combines.
It elaborates below with reference to Fig. 1~4 pair the utility model.
Configure hot standby power supply inside the electrical monitoring and protection signal device of turbine-generator units, and redundant configuration is electrically overrun guarantor
Hydraulic buttery valve is protected to realize the protection overrun under DC control circuit power loss to turbine-generator units.It is involved in the utility model
And the content of related software programming etc be the prior art, do not need to be further described.
Water dispenser accident includes that inlet gate surprisingly falls (or inlet valve accidental switches off), each bearing running hot, stator overheat, one
Grade overruns when shutting down that master cuts with tripping or break pin, second level is overrun with governor accident low oil pressure etc..
Embodiment 1
A kind of hydraulic turbine overspeed protection system in the case of DC control supply power loss, including
Turbine-generator units 5 generate electricity for converting electric energy for water energy；
Double loop power supply 2, for being provided not for the overspeed protection system of turbine-generator units in DC control circuit power loss
Power supply out of stock；
Switch letter is generated for incuding the double wedge part of 7 fluted disc 8 of generator shaft in turbine-generator units close to switch 3
Number；
Electrical overspeed protection measure and control device 1 converts pulsewidth to generating unit speed for measuring the pulsewidth of switching signal, and
Judge whether generating unit speed is more than setting valve, if generating unit speed is more than setting valve, judges that unit has generated level-one and overrun/bis-
Grade is overrun；
Electrical overspeed protection measure and control device includes PLC main control module, and the D/A conversion being electrically connected with PLC main control module
Module and liquid crystal display operation module, D/A conversion module are connected to close to switch；
The electrical overspeed protection hydraulic buttery valve 4 of two concatenations, one of them (i.e. electrical overspeed protection hydraulic buttery valve one
HV1) for being controlled by the LCU of turbine-generator units in the water dispenser accident including turbine-generator units generation is overrun including level-one
Make its movement；Another (i.e. electrical two HV2 of overspeed protection hydraulic buttery valve) is used to generate second level in turbine-generator units and overrun
When, it is directly powered by electrical overspeed protection measure and control device and controls its movement.
It is inductance approach switch close to switch 3.
Inductance approach switch is made of three parts：Oscillator, switching circuit and amplification output circuit.Oscillator generates
One alternating magnetic field.When metal target is close to this magnetic field, and reaches distance of reaction, vortex is generated in metal target, from
And lead to oscillatory extinction, so that failure of oscillation.Oscillator oscillation and the variation of failure of oscillation are processed and converted to switch by rear class amplifying circuit
Signal triggers drive control device, to reach contactless testing goal.
Double loop power supply 2：It is all the way station-service AC power source, the DC control supply provided all the way for electric station DC system,
Device internal conversion forms hot standby 24V by rectifier bridge component for DC24V and controls power supply.
Water dispenser accident further includes accident low oil pressure, master with tripping and guide vane interruption pin interruption and other water dispenser accidents etc..
As shown in figure 4, the generator shaft 7 of generator is equipped with flyweight GS in turbine-generator units 5, above-mentioned electrically overruns
Protect one HV1 of hydraulic buttery valve and electrical two HV2 of overspeed protection hydraulic buttery valve series connection, electrical overspeed protection hydraulic buttery valve two
HV2 is connected to governor 6 by emergency distributing valve SP；Wherein, generator shaft, flyweight GS, electrical overspeed protection hydraulic buttery valve
One HV1, electrical two HV2 of overspeed protection hydraulic buttery valve and emergency distributing valve SP constitute overspeed limiting system.
Embodiment 2
It is with the main distinction of embodiment 1, the present embodiment will be set as two, and two close switch phases close to switch
To the double wedge part for being set to generator shaft fluted disc, two match close to switch, help to eliminate measurement caused by axis is swung
Error.
What the utility model did not elaborated partly belongs to techniques well known, and those skilled in the art are according to existing
Description can be implemented without creative efforts, therefore, repeat no more.
Claims (7)
1. the hydraulic turbine overspeed protection system in the case of a kind of DC control supply power loss, which is characterized in that including
Double loop power supply, for providing power supply not out of stock；
Switching signal is generated for incuding the double wedge part of generator shaft fluted disc in turbine-generator units close to switch；
Electrical overspeed protection measure and control device, for judging that turbine-generator units have generated level-one and overrun/bis- according to switching signal
Grade is overrun；
The electrical overspeed protection hydraulic buttery valve of two concatenations, it includes level-one mistake that one of them, which is used to generate in turbine-generator units,
When water dispenser accident including speed, its movement is controlled by the LCU of turbine-generator units；Another is used to generate in turbine-generator units
When second level is overrun, its movement is controlled by electrical overspeed protection measure and control device.
2. the hydraulic turbine overspeed protection system in the case of a kind of DC control supply power loss as described in claim 1, feature
It is, is one or two close to switch.
3. the hydraulic turbine overspeed protection system in the case of a kind of DC control supply power loss as claimed in claim 1 or 2, special
Sign is that, if being two close to switch, two are oppositely arranged close to switch.
4. the hydraulic turbine overspeed protection system in the case of a kind of DC control supply power loss as claimed in claim 1 or 2, special
Sign is, is inductance approach switch close to switch.
5. the hydraulic turbine overspeed protection system in the case of a kind of DC control supply power loss as described in claim 1, feature
Be, double loop power supply include electric station DC system provide DC control supply and it is rectified after station-service AC power source.
6. the hydraulic turbine overspeed protection system in the case of a kind of DC control supply power loss as claimed in claim 5, feature
Be, electric station DC system provide DC control supply and it is rectified after station-service AC power source output be DC24V.
7. the hydraulic turbine overspeed protection system in the case of a kind of DC control supply power loss as described in claim 1, feature
It is, water dispenser accident further includes that accident low oil pressure, level-one master when shutting down that overruns cut with tripping or break pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820486469.4U CN208106641U (en) | 2018-04-08 | 2018-04-08 | A kind of hydraulic turbine overspeed protection system in the case of DC control supply power loss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820486469.4U CN208106641U (en) | 2018-04-08 | 2018-04-08 | A kind of hydraulic turbine overspeed protection system in the case of DC control supply power loss |
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| Publication Number | Publication Date |
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| CN208106641U true CN208106641U (en) | 2018-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820486469.4U Active CN208106641U (en) | 2018-04-08 | 2018-04-08 | A kind of hydraulic turbine overspeed protection system in the case of DC control supply power loss |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115875185A (en) * | 2022-11-03 | 2023-03-31 | 中国长江电力股份有限公司 | Overspeed protection device and method for hydroelectric generating set |
-
2018
- 2018-04-08 CN CN201820486469.4U patent/CN208106641U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115875185A (en) * | 2022-11-03 | 2023-03-31 | 中国长江电力股份有限公司 | Overspeed protection device and method for hydroelectric generating set |
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