CN105507961B - Method for using supercritical-unit water-feeding-pump steam turbine protection system - Google Patents
Method for using supercritical-unit water-feeding-pump steam turbine protection system Download PDFInfo
- Publication number
- CN105507961B CN105507961B CN201610025553.1A CN201610025553A CN105507961B CN 105507961 B CN105507961 B CN 105507961B CN 201610025553 A CN201610025553 A CN 201610025553A CN 105507961 B CN105507961 B CN 105507961B
- Authority
- CN
- China
- Prior art keywords
- feed pump
- oil
- pressure
- magnetic valves
- pressure switch
- 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.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/08—Adaptations for driving, or combinations with, pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/20—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted
- F01D17/22—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical
- F01D17/26—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical fluid, e.g. hydraulic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/30—Application in turbines
- F05D2220/31—Application in turbines in steam turbines
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
Abstract
The invention discloses a method for using a supercritical-unit water-feeding-pump steam turbine protection system, and belongs to the technical field of water-feeding-pump steam turbine protection devices. The method for using the supercritical-unit water-feeding-pump steam turbine protection system includes the step that a logical judgment module comprises a water feeding pump RB movement triggering condition, wherein the water feeding pump RB movement triggering condition is that 1, after a water-feeding-pump steam turbine is latched on, any two output signals of PS/01, PS/02 and PS/03 are taken; 2, any two taken output signals are inverted; 3, when the two inverted output signals are 'yes', a water feeding pump RB movement is triggered; when at least one of the two inverted output signals is 'no', the water feeding pump RB movement is not triggered. By means of the method, the aims that the reliability and the safety of the water-feeding-pump steam turbine protection system are both remarkably improved are achieved.
Description
Present patent application is directed to Application No.：2015102925637 divisional application, the applying date of original application
For：2015-05-29, invention and created name is：A kind of supercritical unit feed pump Turbine protection system and its application method.
Technical field
The present invention relates to feed pump Turbine protection engineering device technique field, given more specifically to a kind of supercritical unit
The application method of water pump Turbine protection system.
Background technology
The parameter that thermal power plant's supercritical unit refers to working medium in boiler meets or exceeds more than critical pressure unit.Pot
Working medium in stove is all water, and the critical pressure of water is：22.115MPA, 374.15 DEG C；In this pressure and temperature, water and steaming
The latent heat of vaporization of vapour conversion is equal to zero, and it is continuous to become steam in the absence of two-phase section, i.e. water, and is carried out with single-phase form, just
The critical point of water is cried, power pressure is exactly super critical boiler more than this pressure in stove.
Existing thermal power plant is typically using decentralised control module (i.e. distributed control systems, abbreviation
DCS).DCS is that based on microprocessor, with microcomputer decentralised control, operation and management are grouped as characteristic, collect advanced computer
Technology, mechanics of communication, CRT technologies and control technology are 4C technologies in the novel control module of one.
Existing steam turbine main inlet throttle-stop valve is typically opened by hydraulic oil, such as Chinese Patent Application No.：
2013107500687, the applying date：On December 31st, 2013, invention and created name is：Steam turbine self-starting fueller, the Shen
Please case disclose a kind of steam turbine self-starting fueller, belong to steam turbine field, including open throttle certainly, throttle bag is opened certainly
The hydraulic oil cylinder of sealing is included, spring is set on hydraulic oil cylinder bottom surface, spring upper end sets piston, and piston forms hydraulic oil with hydraulic oil cylinder
Chamber, oil pipe is connected with high-voltage oil cavity, and standing valve door rod on piston bottom surface, valve lever is arranged in steam pipe, and steam pipe connects
Small turbine is connect, small turbine drive connection oil pump, oil pump connected pipes prevent tile kilning.
Feed pump Turbine protection device (METS) is feed pump turbine emergency trip protection device, and feed pump is used for boiler
Upper water, normal is 2 50% feed pumps of configuration, configures driving of 2 small turbines respectively as pump, paired running, Dang Yitai
Feed pump steam turbine because protection signal act when, Feed Pump Trip, while triggering feed pump RB action (i.e. feed pump fast cutback
Action), unit carries out removal of load operation, until stabilization under new operating mode, feed pump Turbine protection unit protection feedwater mercury vapour
The operation safety of machine, can complete safety stop and there is the heat pump of failure, and can maintain unit compared with underload in case of a fault
Lower operation.
As the electricity of fired power generating unit removal of load under network operation examines the increasing of dynamics, when (the air-supply of a certain subsidiary engine of unit
Machine, air-introduced machine, primary air fan and feed pump etc.) after fault trip, unit can get rid of the load of more than half, to company's generated energy
Influence is very big, while separate unit subsidiary engine runs, once occurring tripping operation again, then two subsidiary engines can be caused to lose MFT, and (main fuel is jumped
Lock) action, shutdown of boiler, steam turbine, generator stop transport, and causes that unit is non-to stop.
Supercritical boiler feedwater of the prior art generally uses two 50% feed pumps, in the guarantor of feed pump steam turbine
In protection unit, two paths of signals is divided into when fault tripping signal is sent by DCS system, all the way for acting AST magnetic valves, unloads EH
Oil, makes lock magnetic valve for action all the way, unloads lubricating oil；Wherein AST magnetic valves belong to normal powered magnetic valve, that is, feed water mercury vapour
When machine protection device is without trip signal, AST magnetic valves belong to the electrically lower operation of normal band, and AST magnetic valves are in full off state, when
When trip signal sends, AST magnetic valve dead electricity, EH oil returns to oil return box (i.e. EH fuel tanks), and the pressure of EH oil is reduced rapidly, made
Feed pump steam turbine inlet valve (main inlet throttle-stop valve) is closed, and low pressure timing steam gate is closed, and feed pump steam turbine is able to safe stoppage in transit.But, this
There is huge potential safety hazard in the protected mode for planting feed pump steam turbine, the mercury vapour that feeds water can be caused when AST magnetic valves occur abnormal
Chance error action is stopped transport, so as to cause unit load down, can even cause sometimes whole unit occur it is non-stop, have a strong impact on unit fortune
Capable security and economical.In sum, the protection device of existing feed pump steam turbine has that security is low and reliability not enough
Defect.
Therefore, how to overcome the defect that the protection device security of existing feed pump steam turbine is low and reliability is not enough, be existing
There is a technical barrier for urgent need to resolve in technology.
The content of the invention
1. the invention technical problem to be solved
The defect that protection device security instant invention overcomes existing feed pump steam turbine is low and reliability is not enough, there is provided
A kind of application method of supercritical unit feed pump Turbine protection system, realizes feed pump Turbine protection system reliability and peace
The target that full property is significantly increased.
2. technical scheme
To reach above-mentioned purpose, the technical scheme that the present invention is provided is：
Supercritical unit feed pump Turbine protection system of the invention, including EH fuel tanks, EH oil pumps group, protection device main body
And pressure switch apparatus；
The oil-out of the EH fuel tanks by separating three tunnels after EH oil pump groups, wherein：The first via is communicated to feed pump steam turbine
Main inlet throttle-stop valve；Second tunnel is communicated to after protection device main body the oil return opening for returning to EH fuel tanks；3rd tunnel is communicated to pressure switch apparatus
The oil return opening of EH fuel tanks is returned to afterwards.
As a further improvement on the present invention, the protection device main body includes control module, AST magnetic valves A, AST electricity
Magnet valve B, throttle orifice A and throttle orifice B；
The AST magnetic valves A and throttle orifice A is in parallel, and AST magnetic valves B and throttle orifice B is in parallel, wherein：It is connected in parallel
AST magnetic valves A, throttle orifice A connect with the AST magnetic valves B, the throttle orifice B that are connected in parallel；
The AST magnetic valves A and AST magnetic valve B is electrically connected with control module.
As a further improvement on the present invention, the pressure switch apparatus include being sequentially connected in series pressure switch A together,
Pressure switch B, pressure switch C and extension lock magnetic valve；
The pressure switch apparatus also include logic judgment module, pressure switch A, pressure switch B and pressure switch C with
Logic judgment module is electrically connected；
The output signal of pressure switch A, pressure switch B and pressure switch C is respectively PS/01, PS/02 and PS/03.
As a further improvement on the present invention, three measuring points are provided between the throttle orifice A and throttle orifice B, wherein：First
Individual measuring point connects pressure switch high, and second measuring point connects pressure gauge (408) on the spot, and the 3rd measuring point connects pressure low switch.
As a further improvement on the present invention, the EH oil pumps group includes the EH oil A pumps and EH oil B pumps that are connected in parallel.
The application method of supercritical unit feed pump Turbine protection system of the invention, its logic judgment module includes one
Feed pump RB action triggers conditions；
Above-mentioned feed pump RB action triggers conditions are：(1), feed pump steam turbine hang lock after, appoint take PS/01, PS/02 and
Two output signals in PS/03；(2) two output signals for, being taken to above-mentioned carry out inversion operation；(3), it is above-mentioned negate after
Two output signals when being "Yes", then feed pump RB actions are triggered；Above-mentioned two output signals of the inverted are at least
When having one for "No", then feed pump RB actions are not triggered.
As a further improvement on the present invention, after unit load more than or equal to rated load 50%, above-mentioned feedwater
Pump RB action triggers condition triggered as normal；After unit load less than rated load 50%, above-mentioned feed pump RB action triggers
Condition not valid.
As a further improvement on the present invention, the feelings being turned off in AST magnetic valves A, AST magnetic valve B and extension lock magnetic valve
Under condition, the EH oil in EH fuel tanks is pressurized to 13.5~14.5MPa by EH oil pump groups, and the EH oil of 13.5~14.5MPa is by throttling
6.7~7.3MPa is depressured to after the A of hole, the EH oil of 6.7~7.3MPa after throttle orifice B by being depressured to 0~0.2MPa.
As a further improvement on the present invention, the critical value of pressure switch high is 9.3MPa, when pressure switch high is detected
When oil pressure is more than 9.3MPa, then alarm for high voltage signal can be sent to control module；The critical value of pressure low switch is 4.2MPa, when
When pressure low switch detects oil pressure less than 4.2MPa, then low pressure alarming signal can be sent to control module.
As a further improvement on the present invention, including AST solenoid valve failure determination methods, the fault judgment method is：
(1), when control module receives alarm for high voltage signal, then judge that AST magnetic valves A is in dead electricity and opens or interior leakage state, AST
Magnetic valve B is in Normal Shutdown state；(2), when control module receives low pressure alarming signal, then judge at AST magnetic valves B
Opened or interior leakage state in dead electricity, AST magnetic valve A state in which is unknown.
3. beneficial effect
The technical scheme provided using the present invention, compared with prior art, with following remarkable result：
(1) in the present invention, AST magnetic valve A and AST magnetic valves B is in series connection, only as AST magnetic valves A and AST
Magnetic valve B burns or during interior leakage, and EH oil pressure can just be removed, and single AST magnetic valves A is when occurring malfunction and being opened,
Will not be removed EH oil pressure, reduce the malfunction rate of AST magnetic valves, substantially increase the reliability of AST magnetic valves；Work as generation
AST magnetic valves burn or during interior leakage, pressure switch high or the meeting of pressure low switch and alarm, operations staff is sent out in time
Existing, treatment, substantially increases the reliability of AST magnetic valves in time；And the alarm signal that will can be received in control module is collected
Get up, delivering to DCS system carries out trend analysis, be monitoring AST magnetic valve states, the historical data of accident conditions is transferred and divided
Analysis, there is provided important evidence；Therefore, supercritical unit feed pump Turbine protection system of the invention is compared to of the prior art
Feed pump Turbine protection device, its reliability is greatly enhanced.
(2) in the present invention, pressure switch A, pressure switch B and pressure switch C are used to monitor the pressure state of EH oil, by three
Output signal PS/01, PS/02 and PS/03 of individual pressure switch are used as feed pump RB action triggers conditions in logic judgment module
Input value, realize when AST magnetic valves because burning, interior leakage or open the reason for malfunction, there is the shape of feed pump steam turbine stoppage in transit
During condition, feed pump is also capable of synchronous rapid-transport line, to adapt to the stoppage in transit of feed pump steam turbine, it is to avoid whole unit is because of parameter
Mismatch, parameter-beyond-limit and forced outage, cause the non-situation stopped of unit；Therefore, supercritical unit feedwater mercury vapour of the invention
Machine protection system is greatly enhanced compared to feed pump Turbine protection device of the prior art, its security.Meanwhile, in order to
Ensure feed pump RB trigger conditions more comprehensively, be prevented effectively from malfunction, increase the reliability of RB Function of Feedwater Pump, for unit load
Less than the situation of rated load 50%, illustrate that feed pump has been in the state of rapid-transport line, moved without triggering feed pump RB
Make, now feed pump RB action triggers condition not valid.
Brief description of the drawings
Fig. 1 is the system flow chart of supercritical unit feed pump Turbine protection system in the present invention；
Fig. 2 is the cut-away view of protection device main body in the present invention；
Fig. 3 is the logic judgment figure of feed pump RB action triggers conditions in the present invention.
Label declaration in schematic diagram：1st, EH fuel tanks；2nd, EH oil A pumps；3rd, EH oil B pumps；4th, protection device main body；401st, control
Molding block；402nd, AST magnetic valves A；403rd, AST magnetic valves B；404th, throttle orifice A；405th, throttle orifice B；406th, pressure switch high；
407th, pressure low switch；408th, pressure gauge on the spot；5th, pressure switch A；6th, pressure switch B；7th, pressure switch C；8th, lock electromagnetism is hung
Valve.
Specific embodiment
To further appreciate that present disclosure, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.
Embodiment 1
With reference to Fig. 1 and Fig. 2, the supercritical unit feed pump Turbine protection system of the present embodiment, including EH fuel tanks 1, EH oil
Pump group, protection device main body 4 and pressure switch apparatus, EH oil pumps group include the EH oil A pumps 2 and EH oil B pumps 3 that are connected in parallel,
The oil-out of EH fuel tanks 1 by separating three tunnels after EH oil pump groups, wherein：The first via is communicated to feed pump steam turbine main inlet throttle-stop valve；Second
Road is communicated to after protection device main body 4 oil return opening for returning to EH fuel tanks 1；3rd tunnel returns to EH oil after being communicated to pressure switch apparatus
The oil return opening of case 1.Protection device main body 4 includes control module 401, AST magnetic valve A402, AST magnetic valves B403, throttle orifice
A404 and throttle orifice B405, AST magnetic valve A402 and throttle orifice A404 are in parallel, and AST magnetic valves B403 and throttle orifice B405 is in parallel,
AST magnetic valves A402, the throttle orifice A404 being connected in parallel go here and there with AST magnetic valves B403, the throttle orifice B405 being connected in parallel
Connection；Three measuring points, first measuring point connection pressure switch 406 high, second are provided between throttle orifice A404 and throttle orifice B405
Measuring point connects pressure gauge 408 on the spot, the 3rd measuring point connection pressure low switch 407；AST magnetic valve A402 and AST magnetic valves
B403 is electrically connected with control module 401.Pressure switch apparatus include being sequentially connected in series pressure switch A5, pressure switch together
B6, pressure switch C7 and extension lock magnetic valve 8；Pressure switch apparatus also include logic judgment module, pressure switch A5, pressure switch
B6 and pressure switch C7 are electrically connected with logic judgment module；The output of pressure switch A5, pressure switch B6 and pressure switch C7
Signal is respectively PS/01, PS/02 and PS/03.
The application method of the supercritical unit feed pump Turbine protection system of the present embodiment, as shown in figure 3, wherein logic is sentenced
Disconnected module includes a feed pump RB action triggers condition；Above-mentioned feed pump RB action triggers conditions are：(1) in feed pump steam turbine
After hanging lock, appoint two output signals taken in PS/01, PS/02 and PS/03；(2) two output signals for being taken to above-mentioned are carried out
Inversion operation；(3) when above-mentioned two output signals of the inverted are "Yes", then feed pump RB actions are triggered；It is above-mentioned to take
When two output signals at least after anti-are "No", then feed pump RB actions are not triggered.Meanwhile, work as unit load
After the 50% of rated load, above-mentioned feed pump RB action triggers condition triggered as normal；When unit load is less than volume
After the 50% of constant load, above-mentioned feed pump RB action triggers condition not valids.In AST magnetic valves A402, AST magnetic valve B403 and extension
In the case that lock magnetic valve 8 is turned off, EH in EH fuel tanks 1 oil is pressurized to 13.5~14.5MPa by EH oil pump groups, 13.5~
, by being depressured to 6.7~7.3MPa after throttle orifice A404, the EH oil of 6.7~7.3MPa is by throttle orifice for the EH oil of 14.5MPa
0~0.2MPa is depressured to after B405.The critical value of pressure switch 406 high is 9.3MPa, when pressure switch 406 high detects oil pressure
During more than 9.3MPa, then alarm for high voltage signal can be sent to control module 401；The critical value of pressure low switch 407 is 4.2MPa,
When pressure low switch 407 detects oil pressure less than 4.2MPa, then low pressure alarming signal can be sent to control module 401.This reality
Apply the application method of the supercritical unit feed pump Turbine protection system of example, including AST solenoid valve failure determination methods, the failure
Determination methods are：(1) when control module 401 receives alarm for high voltage signal, then judge that AST magnetic valves A402 beats in dead electricity
Open or interior leakage state, AST magnetic valves B403 is in Normal Shutdown state；(2) when control module 401 receives low pressure alarming signal
When, then judging that AST magnetic valves B403 is in dead electricity and opens or interior leakage state, AST magnetic valve A402 state in which is unknown.
As shown in figure 1, the supercritical unit feed pump Turbine protection system of the present embodiment, its operation principle is：Normal fortune
During row, AST magnetic valves A 402, AST magnetic valves B 403 and extension lock magnetic valve 8 are in closed mode, the EH oil in EH fuel tanks 1
After being boosted by EH oil A pumps 2 or EH oil B pumps 3 (EH oil A pumps 2 and EH oil B pumps 3 are that a fortune one is standby), the main vapour of feed pump steam turbine is reached
Door, and (i.e. feed pump steam turbine main inlet throttle-stop valve is in opening) is opened on feed pump steam turbine main inlet throttle-stop valve top, feed pump steam turbine is in just
Normal running status.When unit breaks down, trip signal is issued to up to control module 401, control module by DCS system
401 control AST magnetic valve A402 and AST magnetic valves B403 are opened, the EH after now being boosted by EH oil A pumps 2 or EH oil B pumps 3
Oil is returned in EH fuel tanks 1 by AST magnetic valves A 402 and AST magnetic valves B 403, and the pressure of EH oil is reduced rapidly, EH oil pressure
It is removed, is closed feed pump steam turbine main inlet throttle-stop valve, feed pump steam turbine is able to safe stoppage in transit；While control module 401
Can send feed pump RB action commands after receiving the trip signal that DCS system sends, make feed pump steam turbine operation conditions with to
Water pump RB acts Auto-matching.Wherein, pressure switch A 5, pressure switch B 6 and pressure switch C 7 are used to monitor the pressure of EH oil
Power state, when EH oil does not occur oil return, (the EH oil after being boosted by EH oil A pumps 2 or EH oil B pumps 3 is not returned to EH fuel tanks 1
In), the pressure of EH oil is higher, and pressure switch A 5, pressure switch B 6 and pressure switch C 7 detect the EH oil in high pressure,
Export "Yes" signal；When EH fry dried food ingredients gives birth to oil return, the pressure of EH oil is reduced rapidly, pressure switch A 5, the and of pressure switch B 6
Pressure switch C 7 is not detected by the EH oil of high pressure, exports "No" signal.
The supercritical unit feed pump Turbine protection system and its application method of the present embodiment, it mainly has two functions：a)
AST magnetic valve condition monitorings；B) feed pump steam turbine operation conditions acts Auto-matching with feed pump RB.With reference to its structure and
Specifically explained using process.
A) AST magnetic valves condition monitoring.
According to Fig. 1 and Fig. 2, when feed pump normally runs, AST magnetic valves A402, AST magnetic valve B403 and hang lock electromagnetism
Valve 8 is in the state closed, and now EH oil flows out from EH fuel tanks 1,13.5 are boosted to by EH oil A pumps 2 or EH oil B pumps 3~
14.5MPa, now all the way to feed pump steam turbine main inlet throttle-stop valve, feed pump steam turbine main inlet throttle-stop valve is pushed up EH oil in the presence of EH oil pressure
Open；Ended by extension lock magnetic valve 8 to pressure switch apparatus all the way；All the way to protection device main body 4 by AST magnetic valves A402 and
AST magnetic valves B403 ends.Now EH oil is in cut-off state, and pressure is maintained at 13.5~14.5MPa, and the EH oil of high pressure is maintained
Feed pump steam turbine main inlet throttle-stop valve standard-sized sheet, feed pump steam turbine enters working condition.Protection device main body 4 is provided with throttle orifice A404 and section
Discharge orifice B405, throttle orifice A404 and throttle orifice B405 can lead to too small amount of EH oil, and a small amount of EH oil is returned in EH fuel tanks 1, formed
EH oil trace circulars, transmit the change of EH oil pressures.As shown in Fig. 2 the EH oil of 13.5 micro~14.5MPa is by throttle orifice
Be depressured to 6.7~7.3MPa after A404, the EH oil of micro 6.7~7.3MPa by being depressured to 0 after throttle orifice B405~
0.2MPa (slightly larger than the oil pressure of EH fuel tanks 1), is then back in EH fuel tanks 1.It is provided between throttle orifice A404 and throttle orifice B405
Three measuring points, respectively pressure switch 406, pressure gauge 408 and pressure low switch 407 on the spot high, pressure switch 406 high, on the spot
Pressure gauge 408 and pressure low switch 407 are used to the size of EH oil pressures between detection throttle orifice A404 and throttle orifice B405, its
Middle pressure switch 406 high and pressure low switch 407 have warning function, when the oil pressure detected on pressure switch 406 high is more than
During certain critical value, pressure switch 406 high then sends high pressure alarm signal, when the oil pressure detected on pressure low switch 407
During less than certain critical value, pressure low switch 407 then sends low-pressure alarm signal.Specifically, in the present embodiment, when pressure is high
When switch 406 detects oil pressure more than 9.3MPa, then alarm for high voltage signal can be sent to control module 401；Pressure low switch 407
Critical value be 4.2MPa, when pressure low switch 407 detect oil pressure less than 4.2MPa when, then can be sent to control module 401
Low pressure alarming signal.
In the present embodiment, AST solenoid valve failure determination methods are：(1) when control module 401 receives alarm for high voltage signal
When, then judging that AST magnetic valves A402 is in and burn or interior leakage state, AST magnetic valves B403 is in Normal Shutdown state；(2), when
When control module 401 receives low pressure alarming signal, then judge that AST magnetic valves B403 is in and burn or interior leakage state, AST electromagnetism
Valve A402 state in which is unknown, it is necessary to maintainer scene confirms.
Made a concrete analysis of with reference to AST magnetic valve A402 and AST magnetic valve B403 state in which：
(1) AST magnetic valves A402 and AST magnetic valve B403 is in Normal Shutdown state.
Now the oil pressure between throttle orifice A404 and throttle orifice B405 is 6.7~7.3MPa, pressure low switch 407 and pressure
Height switch 406 does not send alarm signal.
(2) AST magnetic valves A402 is in and burns or interior leakage state (EH oil can directly pass through AST magnetic valve A402), AST electricity
Magnet valve B403 is in Normal Shutdown state.
Now EH oil is by throttle orifice A404, and the oil pressure between throttle orifice A404 and throttle orifice B405 is equal to 13.5~
14.5MPa (i.e. oil pressure of the EH oil in cut-off state), pressure switch 406 high detects oil pressure more than 9.3MPa, to control mould
Block 401 sends alarm for high voltage signal.
(3) AST magnetic valves A402 is in Normal Shutdown state, and AST magnetic valves B403 is in burning or interior leakage state (EH
Oil can directly pass through AST magnetic valve B403).
Now not by throttle orifice B405, the oil pressure between throttle orifice A404 and throttle orifice B405 is equal to EH fuel tanks 1 to EH oil
Interior oil pressure (oil pressure in EH fuel tanks 1 is between 0~0.2MPa), pressure low switch 407 detects oil pressure and is less than 4.2MPa, to
Control module 401 sends low pressure alarming signal.
(4) AST magnetic valves A402 be in be in burning or interior leakage state (EH oil can directly pass through AST magnetic valves
A402), AST magnetic valves B403 is in and burns or interior leakage state (EH oil can directly pass through AST magnetic valve B403).
Now EH oil is not by throttle orifice A404 and throttle orifice B405, the oil pressure between throttle orifice A404 and throttle orifice B405
Equal to the oil pressure (oil pressure in EH fuel tanks 1 is between 0~0.2MPa) in EH fuel tanks 1, it is small that pressure low switch 407 detects oil pressure
In 4.2MPa, low pressure alarming signal is sent to control module 401.
In the present embodiment, the alarm signal received in control module 401 can be collected, delivering to DCS system is carried out
Trend analysis, is monitoring AST magnetic valve states, and the historical data of accident conditions is transferred and analyzed, there is provided important evidence.This reality
Apply in example, pressure gauge 408 is arranged between throttle orifice A404 and throttle orifice B405 on the spot, can measure throttle orifice A404 and throttle orifice
Oil pressure between B405, normal display should be 6.7~7.3MPa, represent that AST magnetic valve A402 and AST magnetic valves B403 is in
Closed position, when the numerical value that oil pressure shows deviates considerably from 6.7~7.3, it was demonstrated that AST magnetic valve A402 and AST magnetic valves B403
There is exception, the numerical value of pressure gauge 408 intuitively changes on the spot, observed when being easy to operations staff to patrol and examine on the spot and judged.
B) feed pump steam turbine operation conditions acts Auto-matching with feed pump RB.
In general, when feed pump steam turbine is stopped transport, feed pump needs rapid-transport line, to adapt to stopping for feed pump steam turbine
Fortune, i.e., feed pump RB actions are accomplished by being triggered if feed pump steam turbine is stopped transport.But, in the prior art, when AST magnetic valves
Because burning, interior leakage or the reason for malfunction when opening, EH oil pressure is removed, and feed pump steam turbine main inlet throttle-stop valve is closed, and makes
Stopped transport into feed pump steam turbine, in such cases, control module 401 does not receive the trip signal that DCS system sends, therefore not
The order of feed pump RB actions can be sent, cause feed pump load to fail to drop in time under the load of matching, cause it is degrading,
Whole unit is mismatched because of parameter, parameter-beyond-limit and forced outage, causes that unit is non-to stop.In the present embodiment, for AST magnetic valves
Because burning, interior leakage or when being opened the reason for malfunction, increased feed pump RB action triggers conditions, feed pump RB actions are touched
Clockwork spring part relies primarily on pressure switch apparatus completion.
Specifically, in the present embodiment, pressure switch apparatus include being sequentially connected in series pressure switch A5, pressure switch together
B6, pressure switch C7, extension lock magnetic valve 8.Pressure switch apparatus also include logic judgment module, pressure switch A5, pressure switch
B6 and pressure switch C7 are electrically connected with logic judgment module；The output of pressure switch A5, pressure switch B6 and pressure switch C7
Signal is respectively PS/01, PS/02 and PS/03.When feed pump normally runs, hang lock magnetic valve 8 and be closed, now press
Power switch A5, pressure switch B6 and pressure switch C7 are used to monitor the pressure state of EH oil：(1) when AST closed electromagnetic valve states
When, EH oil is in cut-off state, and its pressure is maintained at 13.5~14.5MPa, and the EH oil of high pressure maintains feed pump steam turbine main inlet throttle-stop valve
Standard-sized sheet, feed pump steam turbine normal work, now pressure switch A5, pressure switch B6 and pressure switch C7 are detected in high pressure shape
The EH oil of state, the output valve of PS/01, PS/02 and PS/03 is "Yes"；(2) when AST magnetic valves because burning, interior leakage or malfunction
Reason and when opening, EH oil pressure is removed, and its pressure is depressured to 0~0.2MPa, and feed pump steam turbine main inlet throttle-stop valve is closed,
Feed pump steam turbine is stopped transport, and now pressure switch A5, pressure switch B6 and pressure switch C7 are not detected by the EH in high pressure conditions
Oil, the output valve of PS/01, PS/02 and PS/03 is "No".
As shown in figure 3, logic judgment module includes a feed pump RB action triggers condition in the present embodiment：(1), giving
Water pump steam turbine (now hangs lock magnetic valve 8 to be closed) after hanging lock, appoints two taken in PS/01, PS/02 and PS/03 defeated
Go out signal, the i.e. output valve to PS/01, PS/02 and PS/03 carry out " 3 take 2 " treatment, exhaustion by way of select three groups it is defeated
Go out signal combination, it is respectively：1) PS/01 and PS/02；2) PS/01 and PS/03；3) PS/02 and PS/03.(2), to above-mentioned
Two output signals for taking carry out inversion operation, i.e., carry out inversion operation to each output signal respectively, when signal value output is
During "Yes", then output valve of the inverted is "No"；When signal value output is "No", then output valve of the inverted is "Yes".(3)
When above-mentioned two output signals of the inverted are "Yes", then feed pump RB actions are triggered；Above-mentioned two of the inverted defeated
Go out signal at least one be "No" when, then the feed pump RB action be not triggered.Meanwhile, when unit load is more than or equal to volume
After the 50% of constant load, above-mentioned feed pump RB action triggers condition triggered as normal；When unit load is less than the 50% of rated load
Afterwards, above-mentioned feed pump RB action triggers condition not valids.Wherein, the output valve to PS/01, PS/02 and PS/03 carries out " 3 take 2 " place
Reason, it is ensured that as long as the output valve of PS/01, PS/02 and PS/03 at least two is "No", feed pump RB actions are just touched
Hair, even if so setting has one to hinder for some reason and export wrong in ensure that pressure switch A5, pressure switch B6 and pressure switch C7
During the output valve missed, the RB actions of triggering feed pump are remained able to, improve the reliability of feed pump RB action triggers conditions.This reality
Apply feed pump RB action triggers conditions in example, realize when AST magnetic valves because burning, interior leakage or the reason for malfunction be opened
When, feed pump steam turbine operation conditions can act Auto-matching with feed pump RB, reduce the non-probability for stopping of unit.Meanwhile, in order to
Ensure feed pump RB trigger conditions more comprehensively, be prevented effectively from malfunction, increase the reliability of RB Function of Feedwater Pump, for unit load
Less than the situation of rated load 50%, illustrate that feed pump has been in the state of rapid-transport line, moved without triggering feed pump RB
Make, therefore, above-mentioned feed pump RB action triggers condition not valids.
In the present embodiment, AST magnetic valve A402 and AST magnetic valves B403 is in series connection, only when AST magnetic valves
A402 and AST magnetic valves B403 is burnt or during interior leakage, and EH oil pressure can be just removed, and single AST magnetic valves A402 is missed
When moving and being opened, EH oil pressure will not also be removed, reduce the malfunction rate of AST magnetic valves, substantially increase AST magnetic valves
Reliability；Burnt or during interior leakage when there is AST magnetic valves, pressure switch high 406 or the meeting of pressure low switch 407 and alarm,
Operations staff is set to find in time, treatment, substantially increases the reliability of AST magnetic valves in time；And can be by control module 401
In the alarm signal that receives collect, delivering to DCS system carries out trend analysis, is monitoring AST magnetic valve states, accident feelings
The historical data of condition is transferred and analyzed, there is provided important evidence；Therefore, the supercritical unit feed pump Turbine protection of the present embodiment
System is greatly enhanced compared to feed pump Turbine protection device of the prior art, its reliability.
In the present embodiment, pressure switch A 5, pressure switch B 6 and pressure switch C 7 are used to monitor the pressure shape of EH oil
State, touches output signal PS/01, PS/02 and PS/03 of three pressure switches as feed pump RB actions in logic judgment module
The input value of clockwork spring part, realize when AST magnetic valves because burning, interior leakage or open the reason for malfunction, there is feed pump steam turbine and stop
During the situation of fortune, feed pump is also capable of synchronous rapid-transport line, to adapt to the stoppage in transit of feed pump steam turbine, it is to avoid whole unit
Mismatch because of parameter, parameter-beyond-limit and forced outage, cause the non-situation stopped of unit；Therefore, the supercritical unit of the present embodiment
Feed pump Turbine protection system is greatly enhanced compared to feed pump Turbine protection device of the prior art, its security.
Meanwhile, in order to ensure feed pump RB trigger conditions more comprehensively, malfunction is prevented effectively from, increase the reliability of RB Function of Feedwater Pump, pin
Situation to unit load less than rated load 50%, illustrates that feed pump has been in the state of rapid-transport line, without triggering
Feed pump RB is acted, now feed pump RB action triggers condition not valid.
Schematical above that the present invention and embodiments thereof are described, the description does not have restricted, institute in accompanying drawing
What is shown is also one of embodiments of the present invention, and actual structure is not limited thereto.So, if the common skill of this area
Art personnel enlightened by it, in the case where the invention objective is not departed from, is designed and the technical scheme without creative
Similar frame mode and embodiment, all should belong to protection scope of the present invention.
Claims (8)
1. a kind of application method of supercritical unit feed pump Turbine protection system, it is characterised in that：Its logic judgment module bag
Include a feed pump RB action triggers condition；
Above-mentioned feed pump RB action triggers conditions are：(1), after feed pump steam turbine hangs lock, appoint and take PS/01, PS/02 and PS/03
In two output signals；(2) two output signals for, being taken to above-mentioned carry out inversion operation；(3), above-mentioned of the inverted two
When individual output signal is "Yes", then feed pump RB actions are triggered；Above-mentioned two output signals at least of the inverted
It is individual for "No" when, then the feed pump RB action be not triggered；
After unit load more than or equal to rated load 50%, above-mentioned feed pump RB action triggers condition triggered as normal；When
After unit load is less than the 50% of rated load, above-mentioned feed pump RB action triggers condition not valids；
In the case where AST magnetic valves A (402), AST magnetic valves B (403) and extension lock magnetic valve (8) are turned off, EH fuel tanks (1)
Interior EH oil is pressurized to 13.5~14.5MPa by EH oil pump groups, and the EH oil of 13.5~14.5MPa drops by after throttle orifice A (404)
6.7~7.3MPa is pressed onto, the EH oil of 6.7~7.3MPa after throttle orifice B (405) by being depressured to 0~0.2MPa.
2. the application method of supercritical unit feed pump Turbine protection system according to claim 1, it is characterised in that：Pressure
The critical value of power switch high (406) is 9.3MPa, when pressure switch high (406) detects oil pressure more than 9.3MPa, then can be to
Control module (401) sends alarm for high voltage signal；The critical value of pressure low switch (407) is 4.2MPa, when pressure low switch
(407) when detecting oil pressure less than 4.2MPa, then low pressure alarming signal can be sent to control module (401).
3. the application method of supercritical unit feed pump Turbine protection system according to claim 2, it is characterised in that：Bag
AST solenoid valve failure determination methods are included, the fault judgment method is：(1), when control module (401) receives alarm for high voltage letter
Number when, then judge AST magnetic valves A (402) in dead electricity open or interior leakage state, AST magnetic valves B (403) are in normal switching-off
State；(2), when control module (401) receives low pressure alarming signal, then judge that AST magnetic valves B (403) are beaten in dead electricity
Open or interior leakage state, AST magnetic valves A (402) state in which is unknown.
4. the application method of supercritical unit feed pump Turbine protection system according to claim 1, it is characterised in that：
The supercritical unit feed pump Turbine protection system include EH fuel tanks (1), EH oil pumps group, protection device main body (4) and
Pressure switch apparatus；
The oil-out of the EH fuel tanks (1) by separating three tunnels after EH oil pump groups, wherein：The first via is communicated to feed pump steam turbine master
Porthole；Second tunnel is communicated to after protection device main body (4) oil return opening for returning to EH fuel tanks (1)；3rd tunnel is communicated to pressure switch
The oil return opening of EH fuel tanks (1) is returned to after device.
5. the application method of supercritical unit feed pump Turbine protection system according to claim 4, it is characterised in that：
The protection device main body (4) includes control module (401), AST magnetic valves A (402), AST magnetic valves B (403), throttling
Hole A (404) and throttle orifice B (405)；
The AST magnetic valves A (402) and throttle orifice A (404) are in parallel, and AST magnetic valves B (403) and throttle orifice B (405) are in parallel,
Wherein：AST magnetic valves A (402), throttle orifice A (404) and AST magnetic valves B (403), section being connected in parallel being connected in parallel
Discharge orifice B (405) connects；
The AST magnetic valves A (402) and AST magnetic valves B (403) are electrically connected with control module (401).
6. the application method of supercritical unit feed pump Turbine protection system according to claim 5, it is characterised in that：
The pressure switch apparatus include being sequentially connected in series pressure switch A (5), pressure switch B (6), pressure switch C together
(7) and hang lock magnetic valve (8)；
The pressure switch apparatus also include logic judgment module, pressure switch A (5), pressure switch B (6) and pressure switch C
(7) electrically connected with logic judgment module；
The output signal of pressure switch A (5), pressure switch B (6) and pressure switch C (7) is respectively PS/01, PS/02 and PS/
03。
7. the application method of supercritical unit feed pump Turbine protection system according to claim 6, it is characterised in that：
Three measuring points are provided between the throttle orifice A (404) and throttle orifice B (405), wherein：First measuring point connection pressure is high
Switch (406), second measuring point connects pressure gauge (408) on the spot, and the 3rd measuring point connects pressure low switch (407).
8. the application method of supercritical unit feed pump Turbine protection system according to claim 1 and 2, its feature exists
In：
The EH oil pumps group includes EH oil A pumps (2) and EH oil B pumps (3) that are connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610025553.1A CN105507961B (en) | 2015-05-29 | 2015-05-29 | Method for using supercritical-unit water-feeding-pump steam turbine protection system |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510292563.7A CN104863646B (en) | 2015-05-29 | 2015-05-29 | A kind of supercritical unit feed water pump Turbine protection system and using method thereof |
| CN201610025553.1A CN105507961B (en) | 2015-05-29 | 2015-05-29 | Method for using supercritical-unit water-feeding-pump steam turbine protection system |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510292563.7A Division CN104863646B (en) | 2015-05-29 | 2015-05-29 | A kind of supercritical unit feed water pump Turbine protection system and using method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105507961A CN105507961A (en) | 2016-04-20 |
| CN105507961B true CN105507961B (en) | 2017-05-24 |
Family
ID=53909768
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510292563.7A Active CN104863646B (en) | 2015-05-29 | 2015-05-29 | A kind of supercritical unit feed water pump Turbine protection system and using method thereof |
| CN201610025553.1A Active CN105507961B (en) | 2015-05-29 | 2015-05-29 | Method for using supercritical-unit water-feeding-pump steam turbine protection system |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510292563.7A Active CN104863646B (en) | 2015-05-29 | 2015-05-29 | A kind of supercritical unit feed water pump Turbine protection system and using method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN104863646B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110219706B (en) * | 2019-06-21 | 2024-03-08 | 华北电力科学研究院有限责任公司 | Steam supply control circuit, device and method for water supply pump steam source of steam turbine unit |
| CN111779547A (en) * | 2020-07-10 | 2020-10-16 | 西安热工研究院有限公司 | High-low pressure oil circuit safety protection system of steam turbine feed pump |
| CN113309583B (en) * | 2021-04-20 | 2022-11-11 | 华电电力科学研究院有限公司 | Method for triggering emergency trip protection of steam turbine by all faults of DEH controller |
| CN114033506B (en) * | 2021-11-17 | 2023-09-12 | 中国电建集团江西省电力设计院有限公司 | Emergency stop protection device for FCB functional unit |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2676964B2 (en) * | 1990-02-28 | 1997-11-17 | 富士電機株式会社 | Turbine security equipment |
| JP4301681B2 (en) * | 2000-02-29 | 2009-07-22 | 株式会社東芝 | Steam turbine controller for nuclear power plant |
| JP5651515B2 (en) * | 2011-03-29 | 2015-01-14 | 株式会社東芝 | Steam turbine power generation equipment |
| CN102877896B (en) * | 2012-10-11 | 2015-08-19 | 沈翀 | Turbine emergency situation trip protection system |
| CN103982249B (en) * | 2014-05-04 | 2017-07-04 | 上海汇益控制系统股份有限公司 | The emergency trip device of isolation experiment signal |
| CN103953613B (en) * | 2014-05-07 | 2016-05-11 | 山东中实易通集团有限公司 | The field diagnostic method that the safe oil pressure of a kind of emergency trip is low |
| CN204163775U (en) * | 2014-10-31 | 2015-02-18 | 航天科工哈尔滨风华有限公司电站设备分公司 | Turbine emergency trip system |
| CN204738845U (en) * | 2015-05-29 | 2015-11-04 | 马鞍山当涂发电有限公司 | Supercritical unit water -feeding pump steam turbine protection system |
-
2015
- 2015-05-29 CN CN201510292563.7A patent/CN104863646B/en active Active
- 2015-05-29 CN CN201610025553.1A patent/CN105507961B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104863646B (en) | 2016-03-16 |
| CN104863646A (en) | 2015-08-26 |
| CN105507961A (en) | 2016-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105507961B (en) | Method for using supercritical-unit water-feeding-pump steam turbine protection system | |
| CN102052662B (en) | On-line prewarning device and prewarning method for iron scale blockage in high-temperature pipeline of super-critical boiler | |
| CN204738845U (en) | Supercritical unit water -feeding pump steam turbine protection system | |
| CN103982249A (en) | Emergency trip device capable of isolating testing signal | |
| CN110242363B (en) | High-safety protection system for steam turbine generator unit | |
| CN102650219A (en) | 1000 MW ultra-supercritical unit automatic control system | |
| CN103628937A (en) | Method for better utilizing waste gas of turboset | |
| CN211524912U (en) | Safety device of steam turbine feed pump | |
| CN203906017U (en) | Emergency intercept device for isolating test signal | |
| CN212027888U (en) | Four-taking two-speed shutdown control system | |
| CN211924259U (en) | Shut down valves of two shut down are got to four | |
| CN212054828U (en) | Quick-shutdown control system with emergency safety device | |
| CN201372815Y (en) | Integrated electro-hydraulic actuator for quick closing valve | |
| CN212054830U (en) | Four-taking two-speed shutdown control device with emergency security function | |
| CN208073567U (en) | A kind of system of turbine high-pressure blocking module safety on line experiment | |
| CN204647525U (en) | The ball valve of water turbine of double locking | |
| CN109340736B (en) | Two-stage desuperheater protection system for ultra-supercritical boiler reheater | |
| CN208793045U (en) | A kind of Turbo-generator Set high pressure emergency trip module and experiement control device | |
| CN112880945A (en) | Method, device and system for detecting leakage of No. 3 high-pressure heater of steam turbine | |
| CN208918604U (en) | Turbine by-pass condensed water vacuum recovery system | |
| CN207406389U (en) | A kind of biomass high-temperature super-pressure reheating generating set quickly opens furnace system | |
| CN207437899U (en) | A kind of high row's ventilation valve control system of million power generator turbines | |
| CN202868004U (en) | Novel built-in hydraulic cylinder for three-way valve of high-pressure heater and water supply and hydraulic drive | |
| CN206352516U (en) | A kind of steam turbine trip signal control circuit | |
| CN201474731U (en) | Combination valve for a speed regulation system of a steam turbine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |