CN105927961B - Steam-driven induced draft fan automatic Synchronization method and device for thermal power generation unit - Google Patents
Steam-driven induced draft fan automatic Synchronization method and device for thermal power generation unit Download PDFInfo
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- CN105927961B CN105927961B CN201610253345.7A CN201610253345A CN105927961B CN 105927961 B CN105927961 B CN 105927961B CN 201610253345 A CN201610253345 A CN 201610253345A CN 105927961 B CN105927961 B CN 105927961B
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- 238000010248 power generation Methods 0.000 title claims abstract description 82
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- 239000003546 flue gas Substances 0.000 description 3
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N3/00—Regulating air supply or draught
- F23N3/005—Regulating air supply or draught using electrical or electromechanical means
Abstract
The invention discloses a kind of steam-driven induced draft fan automatic Synchronization method and device for thermal power generation unit, method and step includes：Judge whether to need to carry out steam-driven induced draft fan automatic Synchronization according to unit load, the stator blade of electronic air-introduced machine is controlled to maintain the combustion chamber draft of thermal power generation unit stable from motion tracking when needing steam-driven induced draft fan automatic Synchronization, parallel operation is carried out to the steam-driven induced draft fan A in thermal power generation unit, steam-driven induced draft fan B successively, adjust that steam-driven induced draft fan A, steam-driven induced draft fan B rotating speed are consistent with stator blade aperture, control steam-driven induced draft fan A, steam-driven induced draft fan B stator blade are from motion tracking combustion chamber draft；Device includes the completely corresponding automatic Synchronization trigger element of method, electronic air-introduced machine automatic control unit, the first parallel operation control unit, the second parallel operation control unit, steam-driven induced draft fan simultaneously operating control unit.The present invention can reduce the blower fan time arranged side by side, reduce manual operation, reduce blower fan it is arranged side by side during stall and surge risk.
Description
Technical field
The invention mainly relates to the thermal power plant field using steam-driven induced draft fan, and in particular to one kind is used for thermal power generation
The steam-driven induced draft fan automatic Synchronization method and device of unit.
Background technology
At present, thermoelectric generator pool-size gradually increases, and boiler tail equipment increases, and resistance increase, boiler induced-draft fan holds
Amount also gradually increase, boiler induced-draft fan have turned into one of equipment of most power consumption in power plant.The increase of air-introduced machine capacity brings a system
The problem of row, blower fan starting current is excessive, causes the reduction of power station voltage grade；Unit load excursion is big, fan efficiency without
Method works in high efficient district, and the air-introduced machine cost adjusted using frequency converter is higher.Currently, thermal power generation unit uses steam-driven induced draft fan
Turn into trend.
As shown in figure 1, thermal power generation unit typically arranges air-introduced machine in back-end ductwork, wherein IN is air-introduced machine import cigarette
Road, flue gas enter air-introduced machine at IN, and OUT is air-introduced machine exhaust pass, and flue gas is discharged at OUT.Back-end ductwork is arranged at present
Air-introduced machine generally comprises two steam-driven induced draft fans 1（1#1 and 1#2）With an electronic air-introduced machine 2, start steam-driven induced draft fan 1 by small
Steam turbine 11 is driven, and electronic air-introduced machine 2 is driven by motor 21, two steam-driven induced draft fans 1（1#1 and 1#2）Electronic draw with one
Blower fan 2 is then arranged in juxtaposition between air-introduced machine inlet flue duct IN and air-introduced machine exhaust pass OUT, two steam-driven induced draft fans 1（1#1
And 1#2）It can be contributed with an electronic air-introduced machine 2 by adjusting stator blade 3 to change blower fan.In order to which start and stop are convenient, two vapour
Dynamic air-introduced machine 1（1#1 and 1#2）Import with an electronic air-introduced machine 2 is mounted on import electrically operated gate 4, outlet is mounted on out
Mouth electrically operated gate 5, before blower fan startup, import electrically operated gate 4 and outlet electrically operated gate 5 will be opened to establish the passage to circulate；Work as wind
After machine stops, import electrically operated gate 4 and outlet electrically operated gate 5 are intended to close to prevent flue gas from revealing.In order to facilitate control fired power generating unit
Each equipment and part, typically by air-introduced machine body（Steam-driven induced draft fan 1 and electronic air-introduced machine 2）With various electrically operated gates（Import
Electrically operated gate 4 and outlet electrically operated gate 5）, stator blade 3 etc. focuses on control room and is managed and operates, and this control function is scattered, operation
The blind controller system that management is concentrated is referred to as DCS system.As previously mentioned, the thermoelectric generator of steam-driven induced draft fan is used at present
Group generally comprises two steam-driven induced draft fans 1（1#1 and 1#2）With an electronic air-introduced machine 2, therefore steam-driven induced draft fan 1 firepower send out
Blower fan problem arranged side by side be present in power plant's application.In unit starting, typically run using electronic air-introduced machine, reach certain value in load
When, Steam Actuation small turbine carries out warming-up red switch, and First steam-driven induced draft fan and electronic air-introduced machine are arranged side by side, subsequent start-up second
Platform steam-driven induced draft fan, then carried out side by side with the blower fan of remaining operation, the like, last electronic air-introduced machine is out of service.Work as fire
When power generator group is shut down, blower fan off-the-line operating procedure is opposite.
But depth peaking problem is there may be after thermal power generation unit operation, steam-driven induced draft fan needs frequently to carry out simultaneously
Row and off-the-line operation.The arranged side by side and off-the-line of steam-driven induced draft fan is realized by hand using DCS system at present, existing to use steam-operating air inducing
The thermal power plant of machine stops or during load variations, it is necessary to frequently carry out steam-driven induced draft fan manually side by side and off-the-line starting, and deposits
In the defects of cumbersome, elapsed time is long, and if misoperation, steam-driven induced draft fan stall may be caused.And steam-operating is drawn
Stall once occurs for blower fan, and surge can be produced if being coupled again with pipe-line system, and surge is a kind of operating condition of very severe,
The flow of blower fan and total head can occur significantly periodically to shake when surge occurs, and cause fired power generating unit to be difficult to stable operation,
Even emergency shutdown, surge are larger to fan body injury, may result in fan blade fatigue damage.
The content of the invention
The technical problem to be solved in the present invention：For the above mentioned problem of prior art, there is provided one kind can reduce blower fan simultaneously
The vapour for thermal power generation unit of stall and surge risk during row time, reduction manual operation, reduction blower fan are arranged side by side
Dynamic air-introduced machine automatic Synchronization method and device.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：
A kind of steam-driven induced draft fan automatic Synchronization method for thermal power generation unit, step include：
1）Judge whether to need to carry out steam-driven induced draft fan automatic Synchronization according to the unit load of thermal power generation unit, work as needs
Redirected during steam-driven induced draft fan automatic Synchronization and perform step 2）；
2）The stator blade of electronic air-introduced machine is controlled to maintain the combustion chamber draft of thermal power generation unit stable from motion tracking；
3）Parallel operation is carried out to the steam-driven induced draft fan A in thermal power generation unit, the steam-driven induced draft fan A is thermal power generation
One in two steam-driven induced draft fans of unit；
4）Parallel operation is carried out to the steam-driven induced draft fan B in thermal power generation unit, the steam-driven induced draft fan B is thermal power generation
Another in two steam-driven induced draft fans of unit；
5）It is consistent with stator blade aperture to adjust steam-driven induced draft fan A, steam-driven induced draft fan B rotating speed, control steam-driven induced draft fan A, vapour
Dynamic air-introduced machine B stator blade maintains the combustion chamber draft of thermal power generation unit stable from motion tracking, and by the stator blade of electronic air-introduced machine by
Gradually turn down until electronic air-introduced machine exits.
Preferably, the step 1）Detailed step include：The unit load of thermal power generation unit is detected, if unit is born
Lotus reaches given blower fan load point arranged side by side, and the steam turbine of each steam-driven induced draft fan has already warmed up and finished and red switch is standby to low speed
Closed mode is in, import electrically operated gate, outlet electrically operated gate and stator blade, then judges to need steam-driven induced draft fan automatic Synchronization, jumps
Turn to perform step 2）.
Preferably, the step 3）Detailed step include：
3.1）Control steam-driven induced draft fan A raises speed according to given raising speed rate；
3.2）Stop raising speed when steam-driven induced draft fan A exit static pressure is become a full member and pressed by negative pressure, and open steam-driven induced draft fan A's
Export electrically operated gate；
3.3）Control steam-driven induced draft fan A continues to raise speed, and stops when steam-driven induced draft fan A small steam turbine is shown as running status
Steam-driven induced draft fan A is continued to raise speed；
3.4）The combustion chamber draft of thermal power generation unit is lifted, opens steam-driven induced draft fan A import electrically operated gate, and will
Steam-driven induced draft fan A stator blade opens a less specified acquiescence aperture；
3.5）Control steam-driven induced draft fan A continues speed-raising to rated speed, and the quiet of big steam-driven induced draft fan A is opened after stabilization of speed
Leaf, electronic air-introduced machine stator blade turn down automatically；
3.6）When the rotating speed appearance for detecting steam-driven induced draft fan A reduces again rapid rise or steam-driven induced draft fan A and electricity suddenly
The import static pressure of dynamic air-introduced machine close to it is consistent when, judgement steam-driven induced draft fan A is completed side by side.
Preferably, the step 4）Detailed step include：
4.1）Control steam-driven induced draft fan B raises speed according to given raising speed rate；
4.2）Stop raising speed when steam-driven induced draft fan B exit static pressure is become a full member and pressed by negative pressure, and open steam-driven induced draft fan B's
Export electrically operated gate；
4.3）Control steam-driven induced draft fan B continues to raise speed, and stops when steam-driven induced draft fan B small steam turbine is shown as running status
Steam-driven induced draft fan B is continued to raise speed；
4.4）The combustion chamber draft of thermal power generation unit is lifted, opens steam-driven induced draft fan B import electrically operated gate, and will
Steam-driven induced draft fan B stator blade opens a less specified acquiescence aperture；
4.5）Control steam-driven induced draft fan B continues speed-raising to rated speed, and the quiet of big steam-driven induced draft fan B is opened after stabilization of speed
Leaf and the stator blade for synchronously turning down steam-driven induced draft fan A；
4.6）When the rotating speed appearance for detecting steam-driven induced draft fan B reduces again rapid rise or steam-driven induced draft fan B and electricity suddenly
The import static pressure of dynamic air-introduced machine close to it is consistent when, judgement steam-driven induced draft fan B is completed side by side.
Preferably, the step 3）With step 4）The step of also including avoiding stall zone during middle progress parallel operation：
S1）Initialize the output blower fan such as non-and be counted as 0 side by side；
S2）Determine the stall point of each steam-driven induced draft fan；
S3）Detect the operating point of each steam-driven induced draft fan；
S4）The total head difference under the stall point of each steam-driven induced draft fan, operating point same traffic is calculated as current stall
Allowance；
S5）The current current stall margin for carrying out parallel operation steam-driven induced draft fan and setting value are compared, if lost
Fast allowance is less than setting value, then reduces the current stator blade aperture for carrying out parallel operation steam-driven induced draft fan, while detects current carry out
Whether the current stall margin of another steam-driven induced draft fan outside parallel operation steam-driven induced draft fan is 0, if described another
The current stall margin of steam-driven induced draft fan is non-zero, opens the stator blade aperture of the big another steam-driven induced draft fan；
S6）By the output blower fan such as non-, count is incremented side by side, judges the output blower fan such as non-and whether column count exceedes specified time
Number, if not less than predetermined number of times, redirect and perform step S2）；If it exceeds predetermined number of times, then stop currently carrying out arranged side by side
Operate and exit.
Preferably, the step S6）In predetermined number of times be 2 times.
A kind of steam-driven induced draft fan automatic Synchronization device for thermal power generation unit, including：
Automatic Synchronization trigger element, for being judged whether to need progress steam-operating to draw according to the unit load of thermal power generation unit
Blower fan automatic Synchronization, redirected when needing steam-driven induced draft fan automatic Synchronization and perform electronic air-introduced machine automatic control unit；
Electronic air-introduced machine automatic control unit, for controlling the stator blade of electronic air-introduced machine to maintain thermoelectric generator from motion tracking
The combustion chamber draft of group is stable；
First parallel operation control unit, for carrying out parallel operation, institute to the steam-driven induced draft fan A in thermal power generation unit
State one in two steam-driven induced draft fans that steam-driven induced draft fan A is thermal power generation unit；
Second parallel operation control unit, for carrying out parallel operation, institute to the steam-driven induced draft fan B in thermal power generation unit
State another in two steam-driven induced draft fans that steam-driven induced draft fan B is thermal power generation unit；
Steam-driven induced draft fan simultaneously operating control unit, for adjusting steam-driven induced draft fan A, steam-driven induced draft fan B rotating speed and quiet
Leaf aperture is consistent, and control steam-driven induced draft fan A, steam-driven induced draft fan B stator blade maintain the burner hearth of thermal power generation unit to bear from motion tracking
Pressure is stable, and the stator blade of electronic air-introduced machine is gradually turned down until electronic air-introduced machine exits.
The steam-driven induced draft fan automatic Synchronization method tool that the present invention is used for thermal power generation unit has the advantage that：Basis of the present invention
The unit load of thermal power generation unit judges whether to need to carry out steam-driven induced draft fan automatic Synchronization, when needing steam-driven induced draft fan automatic
When arranged side by side, the stator blade of electronic air-introduced machine is controlled to maintain the combustion chamber draft of thermal power generation unit stable from motion tracking, and successively to fire
Steam-driven induced draft fan A in power generator group carries out parallel operation, the steam-driven induced draft fan B in thermal power generation unit is grasped side by side
Make, final adjustment steam-driven induced draft fan A, steam-driven induced draft fan B rotating speed are consistent with stator blade aperture, and control steam-driven induced draft fan A, steam-operating are drawn
Blower fan B stator blade maintains the combustion chamber draft of thermal power generation unit stable from motion tracking, and the stator blade of electronic air-introduced machine is gradually closed
It is small until electronic air-introduced machine exit, the blower fan time arranged side by side can be reduced, reduce manual operation, reduce blower fan it is arranged side by side during mistake
Speed and surge risk.
The steam-driven induced draft fan automatic Synchronization device that the present invention is used for thermal power generation unit is used for thermoelectric generator for the present invention
The completely corresponding device of steam-driven induced draft fan automatic Synchronization method of group, therefore equally also there is the present invention to be used for thermal power generation unit
The aforementioned advantages of steam-driven induced draft fan automatic Synchronization method, therefore will not be repeated here.
Brief description of the drawings
Fig. 1 is the air-introduced machine structural representation in prior art thermal power generation unit.
Fig. 2 is the basic procedure schematic diagram of the embodiment of the present invention.
Fig. 3 is the basic procedure schematic diagram that the embodiment of the present invention carries out parallel operation to steam-driven induced draft fan A.
Fig. 4 is the system structure diagram of thermal power generation unit of the embodiment of the present invention.
Embodiment
Include as shown in Fig. 2 the present embodiment is used for the step of steam-driven induced draft fan automatic Synchronization method of thermal power generation unit：
1）Judge whether to need to carry out steam-driven induced draft fan automatic Synchronization according to the unit load of thermal power generation unit, work as needs
Redirected during steam-driven induced draft fan automatic Synchronization and perform step 2）；
2）The stator blade of electronic air-introduced machine is controlled to maintain the combustion chamber draft of thermal power generation unit stable from motion tracking；
3）Parallel operation is carried out to the steam-driven induced draft fan A in thermal power generation unit, the steam-driven induced draft fan A is thermal power generation
One in two steam-driven induced draft fans of unit；
4）Parallel operation is carried out to the steam-driven induced draft fan B in thermal power generation unit, the steam-driven induced draft fan B is thermal power generation
Another in two steam-driven induced draft fans of unit；
5）It is consistent with stator blade aperture to adjust steam-driven induced draft fan A, steam-driven induced draft fan B rotating speed, control steam-driven induced draft fan A, vapour
Dynamic air-introduced machine B stator blade maintains the combustion chamber draft of thermal power generation unit stable from motion tracking, and by the stator blade of electronic air-introduced machine by
Gradually turn down until electronic air-introduced machine exits.
In the present embodiment, step 1）Detailed step include：The unit load of thermal power generation unit is detected, if unit is born
Lotus reaches given blower fan load point arranged side by side, and the steam turbine of each steam-driven induced draft fan has already warmed up and finished and red switch is standby to low speed
Closed mode is in, import electrically operated gate, outlet electrically operated gate and stator blade, then judges to need steam-driven induced draft fan automatic Synchronization, jumps
Turn to perform step 2）.
As shown in figure 3, the present embodiment step 3）Detailed step include：
3.1）Control steam-driven induced draft fan A raises speed according to given raising speed rate；
3.2）Stop raising speed when steam-driven induced draft fan A exit static pressure is become a full member and pressed by negative pressure, and open steam-driven induced draft fan A's
Export electrically operated gate；
3.3）Control steam-driven induced draft fan A continues to raise speed, and stops when steam-driven induced draft fan A small steam turbine is shown as running status
Steam-driven induced draft fan A is continued to raise speed；
3.4）The combustion chamber draft of thermal power generation unit is lifted, opens steam-driven induced draft fan A import electrically operated gate, and will
Steam-driven induced draft fan A stator blade opens a less specified acquiescence aperture；
3.5）Control steam-driven induced draft fan A continues speed-raising to rated speed, and the quiet of big steam-driven induced draft fan A is opened after stabilization of speed
Leaf, electronic air-introduced machine stator blade turn down automatically；
3.6）When the rotating speed appearance for detecting steam-driven induced draft fan A reduces again rapid rise or steam-driven induced draft fan A and electricity suddenly
The import static pressure of dynamic air-introduced machine close to it is consistent when, judgement steam-driven induced draft fan A is completed side by side.
In the present embodiment, step 4）With step 3）It is essentially identical, simply when opening big steam-driven induced draft fan B stator blade, also need
Further synchronously to turn down steam-driven induced draft fan A stator blade, step 4）Detailed step include：
4.1）Control steam-driven induced draft fan B raises speed according to given raising speed rate；
4.2）Stop raising speed when steam-driven induced draft fan B exit static pressure is become a full member and pressed by negative pressure, and open steam-driven induced draft fan B's
Export electrically operated gate；
4.3）Control steam-driven induced draft fan B continues to raise speed, and stops when steam-driven induced draft fan B small steam turbine is shown as running status
Steam-driven induced draft fan B is continued to raise speed；
4.4）The combustion chamber draft of thermal power generation unit is lifted, opens steam-driven induced draft fan B import electrically operated gate, and will
Steam-driven induced draft fan B stator blade opens a less specified acquiescence aperture；
4.5）Control steam-driven induced draft fan B continues speed-raising to rated speed, and the quiet of big steam-driven induced draft fan B is opened after stabilization of speed
Leaf and the stator blade for synchronously turning down steam-driven induced draft fan A；
4.6）When the rotating speed appearance for detecting steam-driven induced draft fan B reduces again rapid rise or steam-driven induced draft fan B and electricity suddenly
The import static pressure of dynamic air-introduced machine close to it is consistent when, judgement steam-driven induced draft fan B is completed side by side.
In the present embodiment, step 3）With step 4）The step of also including avoiding stall zone during middle progress parallel operation：
S1）Initialize the output blower fan such as non-and be counted as 0 side by side；
S2）Determine the stall point of each steam-driven induced draft fan；
S3）Detect the operating point of each steam-driven induced draft fan；
S4）The total head difference under the stall point of each steam-driven induced draft fan, operating point same traffic is calculated as current stall
Allowance；
S5）The current current stall margin for carrying out parallel operation steam-driven induced draft fan and setting value are compared, if lost
Fast allowance is less than setting value, then reduces the current stator blade aperture for carrying out parallel operation steam-driven induced draft fan, while detects current carry out
Whether the current stall margin of another steam-driven induced draft fan outside parallel operation steam-driven induced draft fan is 0, if described another
The current stall margin of steam-driven induced draft fan is non-zero, opens the stator blade aperture of the big another steam-driven induced draft fan；
S6）By the output blower fan such as non-, count is incremented side by side, judges the output blower fan such as non-and whether column count exceedes specified time
Number, if not less than predetermined number of times, redirect and perform step S2）；If it exceeds predetermined number of times, then stop currently carrying out arranged side by side
Operate and exit.In the present embodiment, step S6）In predetermined number of times be 2 times.
The present embodiment passes through abovementioned steps S1）~S6）, when finding stall margin very little already close to setting value, in time
The stator blade aperture of stall blower fan is reduced, opens the stator blade of a big other non-stall blower fan, and continues to attempt to once non-etc. contribute
Blower fan is arranged side by side, if still there is fan stall alarm, stops blower fan automatic Synchronization, maintains current state, and blower fan is grasped
Control authority returns DCS system, is determined how by operations staff and handles the situation.When the fan stall sensor report in DCS system
When alert, actually stall has occurred that, after stall occurs for many blower fans, operating condition may deteriorate rapidly, even result in
Unit emergency shutdown.By the automatic Synchronization system, can judge in advance blower fan whether stall, so as to avoid stall zone in time
Between.
It should be noted that the stall point of steam-driven induced draft fan can after steam-driven induced draft fan installation is true by testing
Fixed, the performance curve of steam-driven induced draft fan is drawn by field test, for the steam-driven induced draft fan with shape of a saddle performance curve, its
The peak for rising section is stall point, for the blower fan of constant rotational speed（Such as electronic air-introduced machine）For, the formula of stall point
For：H=f(Q), for the steam-driven induced draft fan of variable speed, the calculation formula of its stall point isH=f(Q,n), not only with flowQHave
Close, and also and rotating speednIt is relevant, need to determine the detailed expressions of the formula by field test for different blower fans.Work as wind
When total head under the operating same traffic of machine is more than the total head of stall point, that is, stall occurs；Therefore can be complete by stall point
Pressure and the difference of operating point total head as stall margin, as blower fan whether the basis for estimation of stall.The stall of steam-driven induced draft fan
Point corresponds to the stall zone of steam-driven induced draft fan, and stall zone refers to that stall can be caused when operating point enters the section, normal condition leeward
Machine will not enter the section and work, but when unit carried out transformation, or air channel internal resistance increases suddenly, fan operation is inclined
From accidental conditions, it is possible into stall zone.I.e. under same traffic, the region that total head is more than stall point total head is stall
Area, if stall point is depicted as a curve, the top of curve is stall zone.
It is completely corresponding to be used for the steam-driven induced draft fan automatic Synchronization method of thermal power generation unit with the present embodiment, the present embodiment is used
In the steam-driven induced draft fan automatic Synchronization device of thermal power generation unit, including：
Automatic Synchronization trigger element, for being judged whether to need progress steam-operating to draw according to the unit load of thermal power generation unit
Blower fan automatic Synchronization, redirected when needing steam-driven induced draft fan automatic Synchronization and perform electronic air-introduced machine automatic control unit；
Electronic air-introduced machine automatic control unit, for controlling the stator blade of electronic air-introduced machine to maintain thermoelectric generator from motion tracking
The combustion chamber draft of group is stable；
First parallel operation control unit, for carrying out parallel operation, institute to the steam-driven induced draft fan A in thermal power generation unit
State one in two steam-driven induced draft fans that steam-driven induced draft fan A is thermal power generation unit；
Second parallel operation control unit, for carrying out parallel operation, institute to the steam-driven induced draft fan B in thermal power generation unit
State another in two steam-driven induced draft fans that steam-driven induced draft fan B is thermal power generation unit；
Steam-driven induced draft fan simultaneously operating control unit, for adjusting steam-driven induced draft fan A, steam-driven induced draft fan B rotating speed and quiet
Leaf aperture is consistent, and control steam-driven induced draft fan A, steam-driven induced draft fan B stator blade maintain the burner hearth of thermal power generation unit to bear from motion tracking
Pressure is stable, and the stator blade of electronic air-introduced machine is gradually turned down until electronic air-introduced machine exits.
Referring to Fig. 4, the steam-driven induced draft fan automatic Synchronization device that the present embodiment is used for thermal power generation unit is real in physical arrangement
Mainly by being realized independently of the calculation server 6 of existing DCS system on now, and calculation server 6 passes through data collecting card 7
It is connected with steam-driven induced draft fan A, steam-driven induced draft fan B each inlet and outlet static pressure with dynamic pressure measuring point, simultaneously blower fan is sent by DCS system
Instruct to calculation server 6.It is arranged side by side that calculation server 6 is mainly used to built-in air-introduced machine（Off-the-line）Control program, control program have
Two effects：（1）The fan operation parameter gathered according to data collecting card 7 calculates fan stall allowance；（2）According to internal fan
Opening and closing, the increasing of stator blade aperture of step control steam-driven induced draft fan A/ steam-driven induced draft fans B arranged side by side inlet and outlet MOD
Subtract, the sequence of operations such as the increase and decrease of steam-driven induced draft fan A/ steam-driven induced draft fan B rotating speeds and start and stop.Existing DCS system, calculation server
By bidirectional data transmission link between 6, the communication being mainly used between calculation server and DCS system, equipment and wind are obtained
The control authority of door.Data collecting card 7 is arranged on air-introduced machine air channel, and measuring point is connected to data collecting card 7 by data wire, and
It will be transmitted after data processing to calculation server 6.Measuring point is differential pressure measuring point（△P）And hydrostatic measuring point（P）（Work is calculated for detecting
Make the total head of point）, for separate unit blower fan（Steam-driven induced draft fan A/ steam-driven induced draft fans B）, one is installed respectively in fan inlet and outlet
Hydrostatic measuring point and dynamic pressure measuring point are covered, for measuring steam-driven induced draft fan A/ B total head, to determine its operating point.
Calculation server 6 gathers current fan operation data and calculates current fan operation state, with the liter of unit load
Height, electronic air-introduced machine undercapacity is, it is necessary to successively by steam-driven induced draft fan paired running.When unit load reaches certain value, electricity
Dynamic air-introduced machine is contributed close to the power that overfills（Judged by stator blade aperture or size of current）, and unit load is still to raise
When, that is, automatic Synchronization is triggered, calculation server 6 is based on the foregoing steam-driven induced draft fan automatic Synchronization method of the present embodiment and sent to DCS
Operational order, control steam-driven induced draft fan A, steam-driven induced draft fan B stator blade 3（Movable vane）, import electrically operated gate 4, outlet electrically operated gate 5, and
Avoid stall section automatically according to fan operation state, completion blower fan is arranged side by side, so as to reduce the blower fan time arranged side by side, reduces artificial behaviour
Make, stall and surge risk during reduction blower fan is arranged side by side.For the fired power generating unit equipped with steam-driven induced draft fan, with unit
The reduction of load, the steam inlet condition of steam-driven induced draft fan 1 decline, and acting ability declines；When unit load is less than certain value, steam-operating
It is too low that air-introduced machine 1 enters vapour steam parameter, and acting ability is too poor, even if two steam-driven induced draft fans 1, which are run, can not still meet machine simultaneously
Group on-load needs, it is necessary to the off-the-line of steam-driven induced draft fan 1 isolated, it is out of service, and electronic air-introduced machine is started, is only possible to meet machine
Group needs, and now triggers automatic parallel off, and the steam-driven induced draft fan that the present embodiment the present embodiment is used for thermal power generation unit is automatic simultaneously
The step of row method, inversely performs, then can complete blower fan off-the-line.Equally can also be during blower fan off-the-line and according to blower fan
Running status avoids stall section automatically, and it is arranged side by side to complete blower fan（Off-the-line）, it is arranged side by side so as to reduce blower fan（Off-the-line）Time, reduce people
Work operates, and it is arranged side by side to reduce blower fan（Off-the-line）During stall and surge risk.
It should be noted that steam-driven induced draft fan 1#1 and steam-driven induced draft fan 1#2 has equivalent status, steam-driven induced draft fan A both may be used
To refer to steam-driven induced draft fan 1#1（Now steam-driven induced draft fan B is steam-driven induced draft fan 1#2）Or refer to steam-driven induced draft fan 1#2
（Now steam-driven induced draft fan B is steam-driven induced draft fan 1#1）.
Described above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (7)
- A kind of 1. steam-driven induced draft fan automatic Synchronization method for thermal power generation unit, it is characterised in that step includes：1）Judge whether to need according to the unit load of thermal power generation unit to carry out steam-driven induced draft fan automatic Synchronization, when needing steam-operating Redirected during air-introduced machine automatic Synchronization and perform step 2）；2）The stator blade of electronic air-introduced machine is controlled to maintain the combustion chamber draft of thermal power generation unit stable from motion tracking；3）Parallel operation is carried out to the steam-driven induced draft fan A in thermal power generation unit, the steam-driven induced draft fan A is thermal power generation unit Two steam-driven induced draft fans in one；4）Parallel operation is carried out to the steam-driven induced draft fan B in thermal power generation unit, the steam-driven induced draft fan B is thermal power generation unit Two steam-driven induced draft fans in another；5）It is consistent with stator blade aperture to adjust steam-driven induced draft fan A, steam-driven induced draft fan B rotating speed, control steam-driven induced draft fan A, steam-operating are drawn Blower fan B stator blade maintains the combustion chamber draft of thermal power generation unit stable from motion tracking, and the stator blade of electronic air-introduced machine is gradually closed It is small until electronic air-introduced machine exit.
- 2. the steam-driven induced draft fan automatic Synchronization method according to claim 1 for thermal power generation unit, it is characterised in that The step 1）Detailed step include：The unit load of thermal power generation unit is detected, if unit load reaches given wind Machine load point arranged side by side, and the steam turbine of each steam-driven induced draft fan have already warmed up finish and red switch to low speed is standby, import electrically operated gate, Outlet electrically operated gate and stator blade are in closed mode, then judge to need steam-driven induced draft fan automatic Synchronization, redirect and perform step 2）.
- 3. the steam-driven induced draft fan automatic Synchronization method according to claim 1 for thermal power generation unit, it is characterised in that The step 3）Detailed step include：3.1）Control steam-driven induced draft fan A raises speed according to given raising speed rate；3.2）Stop raising speed when steam-driven induced draft fan A exit static pressure is become a full member and pressed by negative pressure, and open steam-driven induced draft fan A outlet Electrically operated gate；3.3）Control steam-driven induced draft fan A continues to raise speed, and stops when steam-driven induced draft fan A small steam turbine is shown as running status to vapour Dynamic air-introduced machine A continues to raise speed；3.4）The combustion chamber draft of thermal power generation unit is lifted, opens steam-driven induced draft fan A import electrically operated gate, and by steam-operating Air-introduced machine A stator blade opens a less specified acquiescence aperture；3.5）Control steam-driven induced draft fan A continues speed-raising to rated speed, and big steam-driven induced draft fan A stator blade, electricity are opened after stabilization of speed Dynamic air-introduced machine stator blade turns down automatically；3.6）When the rotating speed for detecting steam-driven induced draft fan A occur reducing suddenly again it is rapid go up or steam-driven induced draft fan A and electronic draw The import static pressure of blower fan close to it is consistent when, judge steam-driven induced draft fan A complete side by side.
- 4. the steam-driven induced draft fan automatic Synchronization method according to claim 1 for thermal power generation unit, it is characterised in that The step 4）Detailed step include：4.1）Control steam-driven induced draft fan B raises speed according to given raising speed rate；4.2）Stop raising speed when steam-driven induced draft fan B exit static pressure is become a full member and pressed by negative pressure, and open steam-driven induced draft fan B outlet Electrically operated gate；4.3）Control steam-driven induced draft fan B continues to raise speed, and stops when steam-driven induced draft fan B small steam turbine is shown as running status to vapour Dynamic air-introduced machine B continues to raise speed；4.4）The combustion chamber draft of thermal power generation unit is lifted, opens steam-driven induced draft fan B import electrically operated gate, and by steam-operating Air-introduced machine B stator blade opens a less specified acquiescence aperture；4.5）Control steam-driven induced draft fan B continues speed-raising to rated speed, and big steam-driven induced draft fan B stator blade, simultaneously is opened after stabilization of speed Synchronously turn down steam-driven induced draft fan A stator blade；4.6）When the rotating speed for detecting steam-driven induced draft fan B occur reducing suddenly again it is rapid go up or steam-driven induced draft fan B and electronic draw The import static pressure of blower fan close to it is consistent when, judge steam-driven induced draft fan B complete side by side.
- 5. the steam-driven induced draft fan automatic Synchronization method according to claim 1 for thermal power generation unit, it is characterised in that The step 3）With step 4）The step of also including avoiding stall zone during middle progress parallel operation：S1）Initialize the output blower fan such as non-and be counted as 0 side by side；S2）Determine the stall point of each steam-driven induced draft fan；S3）Detect the operating point of each steam-driven induced draft fan；S4）The total head difference under the stall point of each steam-driven induced draft fan, operating point same traffic is calculated as current stall margin；S5）The current current stall margin for carrying out parallel operation steam-driven induced draft fan and setting value are compared, if stall is abundant Amount is less than setting value, then reduces the stator blade aperture for currently carrying out parallel operation steam-driven induced draft fan, while detects current carry out side by side Whether the current stall margin for operating another steam-driven induced draft fan outside steam-driven induced draft fan is 0, if another steam-operating The current stall margin of air-introduced machine is non-zero, opens the stator blade aperture of the big another steam-driven induced draft fan；S6）By the output blower fan such as non-, count is incremented side by side, judges the output blower fan such as non-and whether column count exceedes predetermined number of times, such as Fruit then redirects not less than predetermined number of times and performs step S2）；If it exceeds predetermined number of times, then stop the parallel operation currently carrying out And exit.
- 6. the steam-driven induced draft fan automatic Synchronization method according to claim 5 for thermal power generation unit, it is characterised in that The step S6）In predetermined number of times be 2 times.
- A kind of 7. steam-driven induced draft fan automatic Synchronization device for thermal power generation unit, it is characterised in that including：Automatic Synchronization trigger element, for judging whether to need to carry out steam-driven induced draft fan according to the unit load of thermal power generation unit Automatic Synchronization, redirected when needing steam-driven induced draft fan automatic Synchronization and perform electronic air-introduced machine automatic control unit；Electronic air-introduced machine automatic control unit, for controlling the stator blade of electronic air-introduced machine to maintain thermal power generation unit from motion tracking Combustion chamber draft is stable；First parallel operation control unit, for carrying out parallel operation, the vapour to the steam-driven induced draft fan A in thermal power generation unit Dynamic air-introduced machine A is one in two steam-driven induced draft fans of thermal power generation unit；Second parallel operation control unit, for carrying out parallel operation, the vapour to the steam-driven induced draft fan B in thermal power generation unit Dynamic air-introduced machine B is another in two steam-driven induced draft fans of thermal power generation unit；Steam-driven induced draft fan simultaneously operating control unit, opened for adjusting steam-driven induced draft fan A, steam-driven induced draft fan B rotating speed and stator blade Degree is consistent, and control steam-driven induced draft fan A, steam-driven induced draft fan B stator blade maintain the combustion chamber draft of thermal power generation unit steady from motion tracking It is fixed, and the stator blade of electronic air-introduced machine is gradually turned down until electronic air-introduced machine exits.
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| CN107166427B (en) * | 2017-06-23 | 2018-12-25 | 辽宁东科电力有限公司 | A kind of fired power generating unit pressure fan automatic control optimization method |
| CN109630452B (en) * | 2018-12-26 | 2020-05-22 | 湖南省湘电试验研究院有限公司 | Automatic parallel method and system for primary fans of thermal generator set |
| CN109973408B (en) * | 2019-03-26 | 2020-12-29 | 大唐桂冠合山发电有限公司 | Method for recovering abnormal adjustment of movable blade of air blower with adjustable movable blade |
| CN110410367A (en) * | 2019-08-06 | 2019-11-05 | 华能国际电力股份有限公司海门电厂 | A kind of steam-driven induced draft fan guide vane adaptive-optimum control method |
| CN110630551B (en) * | 2019-09-10 | 2020-07-31 | 中国能源建设集团华中电力试验研究院有限公司 | Automatic paralleling method and system for induced draft fans of thermal generator set |
| CN113339840B (en) * | 2021-06-17 | 2023-03-10 | 杭州意能电力技术有限公司 | Self-starting control method of thermal power generating unit wind smoke system based on autonomous object |
| CN114017764B (en) * | 2021-11-19 | 2023-05-23 | 西安热工研究院有限公司 | Automatic switching system and method for guide vane and rotating speed control of pneumatic induced draft fan |
| CN114607632A (en) * | 2022-03-22 | 2022-06-10 | 中国能源建设集团华中电力试验研究院有限公司 | Method, system and device for operating induced draft fan of thermal generator set |
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| JPH07158807A (en) * | 1993-12-07 | 1995-06-20 | Mitsubishi Heavy Ind Ltd | Automation system in power generating facility |
| CN101922317B (en) * | 2009-06-09 | 2013-04-24 | 上海电气集团股份有限公司 | Direct energy balance and coordination control system for supercritical thermal power generating unit |
| CN103498805B (en) * | 2013-07-16 | 2016-01-20 | 广东电网公司电力科学研究院 | A kind of thermal power plant steam-driven induced draft fan self adaption no-harass switch device |
| CN104235819A (en) * | 2014-07-29 | 2014-12-24 | 国家电网公司 | Control method for parallel operation of steam-driven induced draft fan and electric induced draft fan of thermal power generating unit |
| CN104879775B (en) * | 2015-04-22 | 2017-04-05 | 山西德润翔电力科技有限公司 | The primary air fan energy-saving control system of speed regulator is hindered with liquid |
| CN105509090B (en) * | 2015-12-09 | 2018-02-27 | 华北电力科学研究院有限责任公司 | A kind of air and gas system and its method of work |
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