CN107905852A - A kind of method of the wide load condensate throttling frequency modulation of fired power generating unit - Google Patents
A kind of method of the wide load condensate throttling frequency modulation of fired power generating unit Download PDFInfo
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- CN107905852A CN107905852A CN201711084262.0A CN201711084262A CN107905852A CN 107905852 A CN107905852 A CN 107905852A CN 201711084262 A CN201711084262 A CN 201711084262A CN 107905852 A CN107905852 A CN 107905852A
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- 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
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- 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
- F01D17/10—Final actuators
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- 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
- F05D2270/00—Control
- F05D2270/70—Type of control algorithm
- F05D2270/706—Type of control algorithm proportional-integral-differential
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- General Engineering & Computer Science (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention discloses a kind of method of the wide load condensate throttling frequency modulation of fired power generating unit, in high load capacity section and solidifying pump frequency conversion instruction not up to lower limit, condensation water frequency conversion instruction is reduced, and condensing water flow reduces, Steam Turbine Regenerative System steam extraction amount is accordingly reduced, and unit load rises；When unit is in underload section or the instruction of solidifying pump frequency conversion has reached lower limit, oxygen-eliminating device main valve aperture is reduced, condensing water flow reduces, and Steam Turbine Regenerative System steam extraction amount is reduced, and unit load rises, so as to fulfill the condensate throttling primary frequency function of wide load section.The present invention can solve the deficiencies in the prior art, realize that unit whole process in AGC wide load settings realizes condensate throttling variable frequency adjustment.
Description
Technical field
The present invention relates to generator set control technical field, especially a kind of wide load condensate throttling frequency modulation of fired power generating unit
Method.
Background technology
In general, to reduce steam turbine pitch restriction loss, high pitch need to be maintained to larger opening, but under the method for operation
Pitch to increase allowance upwards small, cause that unit primary frequency modulation application of load ability is weak, this will directly affect unit responsive electricity grid significantly
Depth fm capacity under vacancy.
Solidifying water-saving throttling frequency modulation is a kind of effective lifting scheme, its essence is to make up boiler heat storage using steam turbine accumulation of heat
The deficiency of fm capacity.Condensate throttling mainly has two kinds of implementations, and one kind is adjusted using deaerator level main valve
Section, another kind are to realize to adjust using solidifying pump frequency conversion device instruction, at present in engineer application, can select one of which scheme, but this
It can cause executing agency's frequent movement of a certain equipment, increase the failure rate of equipment, and if only adjusted by solidifying pump frequency conversion,
Under running on the lower load, when the instruction of solidifying pump frequency conversion device reduces excessive, condensation water main-piping pressure and condensation water user are directly affected
Safety.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of method of the wide load condensate throttling frequency modulation of fired power generating unit, energy
The deficiencies in the prior art are enough solved, realize that unit whole process in AGC wide load settings realizes condensate throttling variable frequency adjustment.
In order to solve the above technical problems, the technical solution used in the present invention is as follows.
A kind of method of the wide load condensate throttling frequency modulation of fired power generating unit, is not up in high load capacity section and solidifying pump frequency conversion instruction
During lower limit, condensation water frequency conversion instruction is reduced, and condensing water flow reduces, and Steam Turbine Regenerative System steam extraction amount is accordingly reduced, and unit is born
Lotus rises；When unit is in underload section or the instruction of solidifying pump frequency conversion has reached lower limit, oxygen-eliminating device main valve aperture is reduced, is condensed
Water flow reduces, and Steam Turbine Regenerative System steam extraction amount is reduced, and unit load rises, so as to fulfill the condensate throttling of wide load section
Primary frequency function.
Preferably, the frequency modulation condensation water standard flow that mains frequency signal is obtained through the first mapping function, the power of the assembling unit
Correction factor is obtained through the second mapping function, condensation water standard flow is multiplied to obtain frequency modulation with correction factor through the first multiplier
Condensing capacity theoretical value；When condensation water frequency modulation activation signal triggers, the first switch (8) output valve is condensation water theory stream
Amount, the first switch output valve coagulate pump PID modules output valve through the first subtracter through first rate limiter and deaerator level
Subtract each other, that is, obtain condensing water flow and coagulate pump setting value；First switch output valve is through the second speed limiting device and the 3rd mapping letter
Several output accelerates condensing water flow pace of change as the secondary feedforward for adjusting PID modules of solidifying pump；When condensation water frequency modulation activation signal
During stopping, the first switch output valve is the first module value, and the first module value is 0, and solidifying pump frequency modulation no longer works；Oxygen-eliminating device water
The setting value of the solidifying pump PID modules in position coagulates pump setting value for deaerator level, and the feedback signal that deaerator level coagulates pump PID modules is
Oxygen-eliminating device measured value, the feed-forward signal that deaerator level coagulates pump PID modules are feedwater flow, and deaerator level coagulates pump PID modules
Output valve control condensing water flow a reference value for solidifying pump；The setting value of the solidifying secondary tune PID modules of pump is coagulated pump for condensing water flow and is set
Definite value, feedback signal are output valve of the condensing water flow through the first filter module, and feed-forward signal is frequency modulation condensing capacity theoretical value
Corrected value after speed limit, output valve are solidifying pump frequency conversion device control instruction.
Preferably, frequency modulation condensing capacity theoretical value is subtracted each other with frequency modulation condensing capacity variable quantity memory value through the second subtracter
The remaining value of condensing water flow variable quantity needed for obtaining；When condensation water frequency modulation activation signal and solidifying pump frequency conversion frequency modulation reach low-limit signal
When triggering at the same time, the second switch output valve is the remaining value of required condensing water flow variable quantity, and the second switch output valve passes through
Third speed limiter subtracts each other with main valve homophony PID modules output valve through the 3rd subtracter, that is, obtains condensing water flow main valve and set
Definite value；Second output of the switch output valve through fourth rate limiter and the 4th mapping function is as the secondary tune PID modules of main valve
Feedforward accelerate condensing water flow pace of change；When condensation water frequency modulation activation signal or solidifying pump frequency conversion frequency modulation stop up to low-limit signal
When, the second switch output valve is the second module value, and the second module value is 0, and main valve frequency modulation no longer works；Further, main valve
The setting value of homophony PID modules is deaerator level main valve setting value, and feedback signal is deaerator level signal, and feed-forward signal is
Feedwater flow, output valve control condensing water flow a reference value for main valve；The setting value of the secondary tune PID modules of main valve is condensing water flow
Main valve setting value, feedback signal are output valve of the condensing water flow through the second filter module, and feed-forward signal is frequency modulation condensing capacity
Corrected value after theoretical value speed limit, output valve instruct for deaerator level main inlet control valve.
Preferably, the first pin of condensation water frequency modulation fling-cut switch, second pin are sent to the first rest-set flip-flop respectively
Set end, reset terminal, for remembering condensation water frequency modulation switching state；Mains frequency signal is sent to lower bound alarm module, for sentencing
It is disconnected that whether low frequency differences primary frequency modulation acts；Condensation water frequency modulation switching memory state signal, low frequency differences primary frequency modulation action signal with
Primary frequency function has put into signal and has made mutually with after computing, sending to the set end of the second rest-set flip-flop, defeated through the first pulse module
Go out the main condition I as the activation of condensation water frequency modulation；After main condition I signal disappears, by the first negated module, the second pulse mode
Block is simultaneously sent to the reset terminal of the second rest-set flip-flop, for resetting the main condition I of condensation water frequency modulation activation；No. 5 low plus water level signals
Send successively to the first high lower bound alarm module, the second negated module, for judging that No. 5 low plus whether water level is in normal condition；6
Number low plus water level signal is sent to the second high lower bound alarm module, the 3rd negated module successively, for judging whether No. 6 low add water level
In normal condition；Deaerator level signal is sent to the 3rd high lower bound alarm module, the 4th negated module successively, for judging to remove
Whether oxygen device water level is in normal condition；Condenser water level signal is sent to the 4th high lower bound alarm module, the 5th negated mould successively
Block, for judging whether condenser water level is in normal condition；The high pitch command signal of steam turbine send paramount limit module, passes through detection
By steam turbine open pitch increase upwards load surplus it is whether limited, for judging whether the high pitch of steam turbine excessive；No. 5 low plus water
Position whether in normal state signal, No. 6 low plus water level whether in normal state signal, deaerator level whether in normal
Whether status signal, condenser water level are in normal state signal, totally five signals make phase to the whether excessive signal of the high pitch of steam turbine
The main condition II activated with computing as condensation water frequency modulation；Main condition I, the main condition II of condensation water frequency modulation activation make phase and computing
Condensation water frequency modulation activation signal is obtained, for judging whether condensation water frequency modulation is active.
Preferably, the lower bound alarm threshold value of lower bound alarm module is 49.9Hz.
Preferably, solidifying pump frequency conversion device control instruction is sent to the first lower bound alarm module, for judging that solidifying pump frequency conversion device refers to
Whether order has reached lower bound；The power of the assembling unit is sent to the second lower bound alarm module, for judging whether unit has reached lower bound；Solidifying pump
Whether whether frequency converter instruction has reached lower bound signal, unit has reached lower bound signal becomes frequency modulation through mutually or after computing obtaining condensing
Frequency reaches lower bound signal；When condensing frequency conversion frequency modulation up to during the triggering of lower bound signal, show that solidifying pump frequency conversion device frequency modulation does not have surplus,
Switch to main valve and change condensation water realization throttling frequency modulation.
Preferably, when condensation water frequency modulation activation signal triggers, the output memory of the 3rd switch is the condensation at the moment
Water flow；When condensation water frequency modulation activation signal and solidifying pump frequency conversion frequency modulation meet at the same time up to low-limit signal, the output of the 4th switch
Remember the condensing water flow for current time；By the output of the 3rd switch and the output of the 4th switch after the 4th subtracter subtracts each other
Obtain frequency modulation condensing capacity variable quantity memory value.
It is using beneficial effect caused by above-mentioned technical proposal：The present invention is main solidifying using changing in high load capacity section
Pump frequency conversion device carries out frequency modulation；When unit load is too low or condensate pump instruction reaches lower limit, automatically switches to main valve and adjust and coagulate
Flow is born water, whole process realizes condensate throttling variable frequency adjustment in AGC wide load settings so as to fulfill unit.
Brief description of the drawings
Fig. 1 is solidifying pump frequency conversion ordering calculation logic chart.
Fig. 2 is deaerator level main valve ordering calculation logic chart.
Fig. 3 is condensation water frequency modulation activation logic chart.
Fig. 4 is that solidifying pump frequency conversion frequency modulation reaches lower limit logic chart.
Fig. 5 is frequency modulation condensation water variable quantity memory value logic chart.
Embodiment
With reference to Fig. 1-5, the N1000-26.25/600/600 that the embodiment of the present invention is produced with Shanghai Turbine Co., Ltd
(TC4F) type, ultra supercritical, a resuperheat, single shaft, four cylinders, four steam discharge, condensing turbine group.
A kind of method of the wide load condensate throttling frequency modulation of fired power generating unit, it is characterised in that：Become in high load capacity section and solidifying pump
When frequency instruction is not up to lower limit, condensation water frequency conversion instruction is reduced, and condensing water flow reduces, and Steam Turbine Regenerative System steam extraction amount is corresponding
Reduce, unit load rises；When unit is in underload section or the instruction of solidifying pump frequency conversion has reached lower limit, oxygen-eliminating device main valve is opened
Degree is reduced, and condensing water flow reduces, and Steam Turbine Regenerative System steam extraction amount is reduced, and unit load rises, so as to fulfill wide load section
Condensate throttling primary frequency function.
The frequency modulation condensation water standard flow that mains frequency signal 1 is obtained through the first mapping function 2, the power of the assembling unit 3 is through second
Mapping function 4 obtains correction factor, condensation water standard flow and correction factor are multiplied to obtain frequency modulation through the first multiplier 5 condense
Water theoretical value 6；When condensation water frequency modulation activates the triggering of 7 signals, 8 output valve of the first switch is condensation water theoretical delivery 6, the
One switch, 8 output valve coagulates 17 output valve of pump PID modules through the first subtracter through first rate limiter 10 and deaerator level
12 subtract each other, that is, obtain condensing water flow and coagulate pump setting value；First switch, 8 output valve is reflected through the second speed limiting device 11 and the 3rd
The output for penetrating function 13 accelerates condensing water flow pace of change as the secondary feedforward for adjusting PID modules 20 of solidifying pump；When condensation water frequency modulation
When activation signal 7 stops, 8 output valve of the first switch is worth for the first module 9, and the first module 9 value is 0, and solidifying pump frequency modulation does not recur
Effect；The setting value that deaerator level coagulates pump PID modules 17 coagulates pump setting value 14 for deaerator level, and deaerator level coagulates pump
The feedback signal of PID modules 17 is oxygen-eliminating device measured value 15, and the feed-forward signal that deaerator level coagulates pump PID modules 17 is to current
Amount 16, the output valve that deaerator level coagulates pump PID modules 17 control condensing water flow a reference value for solidifying pump；Solidifying pump is secondary to adjust PID moulds
The setting value of block 20 coagulates pump setting value for condensing water flow, and feedback signal is condensing water flow 18 through the defeated of the first filter module 19
Go out value, feed-forward signal is the corrected value after frequency modulation condensing capacity theoretical value speed limit, and output valve is solidifying pump frequency conversion device control instruction 21.
Frequency modulation condensing capacity theoretical value 6 subtracts each other to obtain with frequency modulation condensing capacity variable quantity memory value 22 through the second subtracter 23
The remaining value of required condensing water flow variable quantity；When condensation water frequency modulation activation signal 7 and solidifying pump frequency conversion frequency modulation reach low-limit signal 24
When triggering at the same time, 25 output valve of the second switch is the remaining value of required condensing water flow variable quantity, and the second switch 25 exports
Value is subtracted each other through 32 output valve of third speed limiter 27 and main valve homophony PID modules through the 3rd subtracter 29, that is, obtains condensation water
Flow main valve setting value；Output conduct of second switch, 25 output valve through 28 and the 4th mapping function 30 of fourth rate limiter
Condensing water flow pace of change is accelerated in the secondary feedforward for adjusting PID modules 34 of main valve；When condensation water frequency modulation activation signal (7) or solidifying pump become
Frequency modulation frequency is up to during the stopping of low-limit signal 24, and 25 output valve of the second switch is worth for the second module 26, and the second module 26 value is 0, main
Valve frequency modulation no longer works；Further, the setting value of main valve homophony PID modules 32 is deaerator level main valve setting value 31, instead
Feedback signal is deaerator level signal 15, and feed-forward signal is feedwater flow 16, and output valve controls condensing water flow benchmark for main valve
Value；Main valve is secondary, and to adjust the setting values of PID modules 34 be condensing water flow main valve setting value, and feedback signal is condensing water flow 18 through the
The output valve of two filter modules 33, feed-forward signal are the corrected value after frequency modulation condensing capacity theoretical value speed limit, and output valve is deoxygenation
Device water level main inlet control valve instruction 35.
The first pin PK1, the second pin PK2 of condensation water frequency modulation fling-cut switch 36 are sent to the first rest-set flip-flop 37 respectively
Set end, reset terminal, for remembering condensation water frequency modulation switching state；Mains frequency signal 1 is sent to lower bound alarm module 39, is used for
Judge whether that low frequency differences primary frequency modulation acts；Condensation water frequency modulation switching memory state signal, low frequency differences primary frequency modulation action signal
Signal 38 is put into primary frequency function to make mutually with after computing, sending to the set end of the second rest-set flip-flop 40, through the first pulse
Main condition I of the output of module 41 as the activation of condensation water frequency modulation；After main condition I signal disappears, by the first negated module 42,
Second pulse module 43 is simultaneously sent to the reset terminal of the second rest-set flip-flop 40, for resetting the main condition I of condensation water frequency modulation activation；5
Number low plus water level signal 44 is sent to the first high lower bound alarm module 45, the second negated module 46 successively, for judging that No. 5 low add water
Whether position is in normal condition；No. 6 low plus water level signal 47 is sent to the second high lower bound alarm module 48, the 3rd negated module successively
49, for judging that No. 6 are low plus whether water level is in normal condition；Deaerator level signal 15 is sent to the 3rd high lower bound alarm successively
Module 50, the 4th negated module 51, for judging whether deaerator level is in normal condition；Condenser water level signal 52 is successively
Send to the 4th high lower bound alarm module 53, the 5th negated module 54, for judging whether condenser water level is in normal condition；Vapour
The high pitch command signal 55 of machine send it is paramount limit module 56, by detect by steam turbine open pitch increase upwards load surplus whether
It is limited, for judging whether the high pitch of steam turbine is excessive；No. 5 low plus water level whether in normal state signal, No. 6 it is low plus water level is
It is no to be in whether normal state signal, deaerator level are in normal state signal, whether condenser water level is in normal condition
Totally five signals make the main condition II mutually activated with computing as condensation water frequency modulation to the whether excessive signal of the high pitch of signal, steam turbine；
Main condition I, the main condition II of condensation water frequency modulation activation make mutually to obtain condensation water frequency modulation activation signal 7 with computing, for judging to coagulate
Bear water whether frequency modulation is active.
The lower bound alarm threshold value of lower bound alarm module 39 is 49.9Hz.
Solidifying pump frequency conversion device control instruction 21 is sent to the first lower bound alarm module 57, for whether judging solidifying pump frequency conversion device instruction
Lower bound is reached；The power of the assembling unit 3 is sent to the second lower bound alarm module 58, for judging whether unit has reached lower bound；Solidifying pump becomes
Whether whether the instruction of frequency device has reached lower bound signal, unit has reached lower bound signal condenses frequency conversion frequency modulation through mutually or after computing obtaining
Up to lower bound signal；When condensing frequency conversion frequency modulation up to during the triggering of lower bound signal, show that solidifying pump frequency conversion device frequency modulation does not have surplus, cut
Change main valve into and change condensation water realization throttling frequency modulation.
When condensation water frequency modulation activation signal 7 triggers, the output memory of the 3rd switch 61 is the condensing water flow at the moment
59；When condensation water frequency modulation activation signal 7 and solidifying pump frequency conversion frequency modulation meet at the same time up to low-limit signal 24, the 4th switch 60 exports
Remember the condensing water flow 59 for current time；3rd switch 61 is exported and is exported with the 4th switch 60 through the 4th subtracter
62 subtract each other after obtain frequency modulation condensing capacity variable quantity memory value 22.
Foregoing description only proposes as the enforceable technical solution of the present invention, not as to its technical solution single in itself
Restrictive condition.
Claims (7)
- A kind of 1. method of the wide load condensate throttling frequency modulation of fired power generating unit, it is characterised in that：In high load capacity section and solidifying pump frequency conversion When instruction is not up to lower limit, condensation water frequency conversion instruction is reduced, and condensing water flow reduces, and Steam Turbine Regenerative System steam extraction amount accordingly subtracts Few, unit load rises；When unit is in underload section or the instruction of solidifying pump frequency conversion has reached lower limit, by oxygen-eliminating device main valve aperture Reduce, condensing water flow reduces, and Steam Turbine Regenerative System steam extraction amount is reduced, and unit load rises, so as to fulfill wide load section Condensate throttling primary frequency function.
- 2. the method for the wide load condensate throttling frequency modulation of fired power generating unit according to claim 1, it is characterised in that：Power grid frequency The frequency modulation condensation water standard flow that rate signal (1) is obtained through the first mapping function (2), the power of the assembling unit (3) is through the second mapping function (4) correction factor is obtained, condensation water standard flow is multiplied to obtain frequency modulation condensing capacity with correction factor through the first multiplier (5) Theoretical value (6)；When activation (7) signal triggering of condensation water frequency modulation, the first switch (8) output valve is condensation water theoretical delivery (6), the first switch (8) output valve coagulates pump PID modules (17) output valve through first rate limiter (10) and deaerator level Subtract each other through the first subtracter (12), that is, obtain condensing water flow and coagulate pump setting value；First switch (8) output valve is through the second speed The output of limiter (11) and the 3rd mapping function (13) accelerates condensing water flow as the secondary feedforward for adjusting PID modules (20) of solidifying pump Pace of change；When condensation water frequency modulation activation signal (7) stops, the first switch (8) output valve is the first module (9) value, the One module (9) value is 0, and solidifying pump frequency modulation no longer works；The setting value that deaerator level coagulates pump PID modules (17) is oxygen-eliminating device water The solidifying pump setting value (14) in position, the feedback signal that deaerator level coagulates pump PID modules (17) are oxygen-eliminating device measured value (15), oxygen-eliminating device The feed-forward signal that water level coagulates pump PID modules (17) is feedwater flow (16), and deaerator level coagulates the output valve of pump PID modules (17) For solidifying pump control condensing water flow a reference value；The secondary setting value for adjusting PID modules (20) of solidifying pump coagulates pump setting value for condensing water flow, Feedback signal is the output valve of condensing water flow (18) through the first filter module (19), and feed-forward signal is theoretical for frequency modulation condensing capacity The corrected value being worth after speed limit, output valve are solidifying pump frequency conversion device control instruction (21).
- 3. the method for the wide load condensate throttling frequency modulation of fired power generating unit according to claim 2, it is characterised in that：Frequency modulation coagulates The amount of bearing water theoretical value (6) subtracts each other to obtain required condensation with frequency modulation condensing capacity variable quantity memory value (22) through the second subtracter (23) The remaining value of water flow variable quantity；When condensation water frequency modulation activation signal (7) and solidifying pump frequency conversion frequency modulation reach low-limit signal (24) at the same time During triggering, the second switch (25) output valve is the remaining value of required condensing water flow variable quantity, and the second switch (25) exports Value is subtracted each other through third speed limiter (27) with main valve homophony PID modules (32) output valve through the 3rd subtracter (29), that is, is obtained Condensing water flow main valve setting value；Second switch (25) output valve is through fourth rate limiter (28) and the 4th mapping function (30) output accelerates condensing water flow pace of change as the secondary feedforward for adjusting PID modules (34) of main valve；When condensation water frequency modulation swashs Up to during low-limit signal (24) stopping, the second switch (25) output valve is the second module for signal (7) living or solidifying pump frequency conversion frequency modulation (26) value, the second module (26) value are 0, and main valve frequency modulation no longer works；Further, the setting of main valve homophony PID modules (32) It is deaerator level signal (15) to be worth for deaerator level main valve setting value (31), feedback signal, and feed-forward signal is feedwater flow (16), output valve controls condensing water flow a reference value for main valve；The setting value of the secondary tune PID modules (34) of main valve is condensing water flow Main valve setting value, feedback signal are the output valve of condensing water flow (18) through the second filter module (33), and feed-forward signal is frequency modulation Corrected value after condensing capacity theoretical value speed limit, output valve instruct (35) for deaerator level main inlet control valve.
- 4. the method for the wide load condensate throttling frequency modulation of fired power generating unit according to claim 3, it is characterised in that：Condensation water The first pin (PK1) of frequency modulation fling-cut switch (36), second pin (PK2) are sent to the set of the first rest-set flip-flop (37) respectively End, reset terminal, for remembering condensation water frequency modulation switching state；Mains frequency signal (1) is sent to lower bound alarm module (39), is used for Judge whether that low frequency differences primary frequency modulation acts；Condensation water frequency modulation switching memory state signal, low frequency differences primary frequency modulation action signal Signal (38) is put into primary frequency function to make mutually with after computing, sending to the set end of the second rest-set flip-flop (40), through first Main condition I of pulse module (41) output as the activation of condensation water frequency modulation；It is negated by first after main condition I signal disappears Module (42), the second pulse module (43) are simultaneously sent to the reset terminal of the second rest-set flip-flop (40), are swashed for resetting condensation water frequency modulation Main condition I living；No. 5 low plus water level signal (44) is sent to the first high lower bound alarm module (45), the second negated module successively (46), for judging that No. 5 low plus whether water level is in normal condition；No. 6 low plus water level signal (47) is sent to the second height successively Alarm module (48), the 3rd negated module (49) are limited, for judging that No. 6 low plus whether water level is in normal condition；Oxygen-eliminating device water Position signal (15) is sent to the 3rd high lower bound alarm module (50), the 4th negated module (51), for judging deaerator level successively Whether normal condition is in；Condenser water level signal (52) is sent to the 4th high lower bound alarm module (53), the 5th negated mould successively Block (54), for judging whether condenser water level is in normal condition；The high pitch command signal (55) of steam turbine send paramount limit module (56), by detect by steam turbine open pitch increase upwards load surplus it is whether limited, for whether judging the high pitch of steam turbine It is excessive；No. 5 low plus water level whether in normal state signal, No. 6 low plus water levels whether in normal state signal, oxygen-eliminating device water Whether whether position be in normal state signal, condenser water level in normal state signal, the whether excessive signal of the high pitch of steam turbine Totally five signals make the main condition II mutually activated with computing as condensation water frequency modulation；Main condition I, the main bar of condensation water frequency modulation activation Part II makees mutually to obtain condensation water frequency modulation activation signal (7) with computing, for judging whether condensation water frequency modulation is active.
- 5. the method for the wide load condensate throttling frequency modulation of fired power generating unit according to claim 4, it is characterised in that：Lower bound report The lower bound alarm threshold value of alert module (39) is 49.9Hz.
- 6. the method for the wide load condensate throttling frequency modulation of fired power generating unit according to claim 5, it is characterised in that：Solidifying pump becomes Frequency device control instruction (21) is sent to the first lower bound alarm module (57), for judging whether solidifying pump frequency conversion device instruction has reached low Limit；The power of the assembling unit (3) is sent to the second lower bound alarm module (58), for judging whether unit has reached lower bound；Solidifying pump frequency conversion device Whether instruction has reached whether lower bound signal, unit have reached lower bound signal through mutually or after computing obtaining condensing frequency conversion frequency modulation up to low Limit signal；When condensing frequency conversion frequency modulation up to during the triggering of lower bound signal, show that solidifying pump frequency conversion device frequency modulation does not have surplus, switch to Main valve changes condensation water and realizes throttling frequency modulation.
- 7. the method for the wide load condensate throttling frequency modulation of fired power generating unit according to claim 6, it is characterised in that：Work as condensation When water frequency modulation activation signal (7) triggers, the output memory of the 3rd switch (61) is the condensing water flow (59) at the moment；Work as condensation When water frequency modulation activation signal (7) and solidifying pump frequency conversion frequency modulation reach low-limit signal (24) while meet, the 4th switch (60) output note Recall the condensing water flow (59) for current time；The output of 3rd switch (61) and the output of the 4th switch (60) are subtracted through the 4th Musical instruments used in a Buddhist or Taoist mass (62) obtains frequency modulation condensing capacity variable quantity memory value (22) after subtracting each other.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109857033A (en) * | 2019-02-28 | 2019-06-07 | 中国能源建设集团广东省电力设计研究院有限公司 | Condensate throttling switching control method, device and computer equipment |
| CN110107489A (en) * | 2019-04-19 | 2019-08-09 | 中国神华能源股份有限公司 | Control method, system and unit for condensed water water pump |
| CN110212552A (en) * | 2019-06-11 | 2019-09-06 | 中国神华能源股份有限公司 | The control method and system of thermal power generation unit primary frequency modulation |
| CN112398144A (en) * | 2020-11-17 | 2021-02-23 | 江西大唐国际抚州发电有限责任公司 | Primary frequency modulation dynamic cooperative control method of steam turbine regulating system |
| CN112653159A (en) * | 2020-12-16 | 2021-04-13 | 润电能源科学技术有限公司 | Condensate throttling auxiliary frequency modulation control method, device, equipment and storage medium |
| CN113217130A (en) * | 2021-03-17 | 2021-08-06 | 西安热工研究院有限公司 | Deaerator and condenser hot well capacity selection method based on condensed water frequency modulation |
| CN113483319A (en) * | 2021-07-08 | 2021-10-08 | 西安热工研究院有限公司 | Variable-frequency energy-saving optimization control system and method for condensate pump of thermal power generating unit |
| CN113834057A (en) * | 2021-11-03 | 2021-12-24 | 西安热工研究院有限公司 | Wide-load self-adaptive optimization system for unit condensed water |
| CN113883494A (en) * | 2021-08-18 | 2022-01-04 | 广东粤电靖海发电有限公司 | Coal-fired power plant condensate pump frequency conversion decoupling control system and method |
| CN115324675A (en) * | 2022-07-25 | 2022-11-11 | 广西电网有限责任公司电力科学研究院 | Control method for adjusting power grid frequency of thermal power generating unit based on variable-frequency condensate pump |
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| CN109343409B (en) * | 2018-10-30 | 2023-06-13 | 华能国际电力股份有限公司福州电厂 | Auxiliary control system and method for primary frequency modulation of full-cycle steam inlet unit |
| CN109857033A (en) * | 2019-02-28 | 2019-06-07 | 中国能源建设集团广东省电力设计研究院有限公司 | Condensate throttling switching control method, device and computer equipment |
| CN110107489A (en) * | 2019-04-19 | 2019-08-09 | 中国神华能源股份有限公司 | Control method, system and unit for condensed water water pump |
| CN110107489B (en) * | 2019-04-19 | 2020-09-18 | 中国神华能源股份有限公司 | Control method, system and unit for condensate water pump |
| CN110212552A (en) * | 2019-06-11 | 2019-09-06 | 中国神华能源股份有限公司 | The control method and system of thermal power generation unit primary frequency modulation |
| CN110212552B (en) * | 2019-06-11 | 2021-01-22 | 中国神华能源股份有限公司 | Control method and system for primary frequency modulation of thermal generator set |
| CN112398144A (en) * | 2020-11-17 | 2021-02-23 | 江西大唐国际抚州发电有限责任公司 | Primary frequency modulation dynamic cooperative control method of steam turbine regulating system |
| CN112653159A (en) * | 2020-12-16 | 2021-04-13 | 润电能源科学技术有限公司 | Condensate throttling auxiliary frequency modulation control method, device, equipment and storage medium |
| CN112653159B (en) * | 2020-12-16 | 2023-08-15 | 润电能源科学技术有限公司 | Condensate water throttling auxiliary frequency modulation control method, device, equipment and storage medium |
| CN113217130A (en) * | 2021-03-17 | 2021-08-06 | 西安热工研究院有限公司 | Deaerator and condenser hot well capacity selection method based on condensed water frequency modulation |
| CN113483319A (en) * | 2021-07-08 | 2021-10-08 | 西安热工研究院有限公司 | Variable-frequency energy-saving optimization control system and method for condensate pump of thermal power generating unit |
| CN113883494A (en) * | 2021-08-18 | 2022-01-04 | 广东粤电靖海发电有限公司 | Coal-fired power plant condensate pump frequency conversion decoupling control system and method |
| CN113834057A (en) * | 2021-11-03 | 2021-12-24 | 西安热工研究院有限公司 | Wide-load self-adaptive optimization system for unit condensed water |
| CN115324675A (en) * | 2022-07-25 | 2022-11-11 | 广西电网有限责任公司电力科学研究院 | Control method for adjusting power grid frequency of thermal power generating unit based on variable-frequency condensate pump |
| CN115324674A (en) * | 2022-07-25 | 2022-11-11 | 广西电网有限责任公司电力科学研究院 | System for frequency conversion condensate pump of thermal power generating unit participates in power grid frequency adjustment |
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