CN104158453B - A kind of by the generator load sudden change start time shielding interference signal suppression anti-method adjusted of power - Google Patents
A kind of by the generator load sudden change start time shielding interference signal suppression anti-method adjusted of power Download PDFInfo
- Publication number
- CN104158453B CN104158453B CN201410427599.7A CN201410427599A CN104158453B CN 104158453 B CN104158453 B CN 104158453B CN 201410427599 A CN201410427599 A CN 201410427599A CN 104158453 B CN104158453 B CN 104158453B
- Authority
- CN
- China
- Prior art keywords
- change
- power
- instantaneous rate
- steam turbine
- instruction
- 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
- 230000008859 change Effects 0.000 title claims abstract description 222
- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000001629 suppression Effects 0.000 title claims abstract description 18
- 230000033228 biological regulation Effects 0.000 claims description 51
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 230000002085 persistent effect Effects 0.000 claims description 14
- 230000001052 transient effect Effects 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 claims description 8
- 230000003321 amplification Effects 0.000 description 6
- 238000003199 nucleic acid amplification method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000004088 simulation Methods 0.000 description 4
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 3
- 240000002853 Nelumbo nucifera Species 0.000 description 3
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000035772 mutation Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000031016 anaphase Effects 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010205 computational analysis Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000017105 transposition Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Landscapes
- Control Of Eletrric Generators (AREA)
- Control Of Turbines (AREA)
Abstract
The invention discloses a kind of by the generator load sudden change start time shielding interference signal suppression anti-method adjusted of power.The basic thought of the present invention is to introduce load governor according to the anti-disturbing signal adjusted of power when generator load sudden change just starts to occur, and weak, the characteristic of rapid decay after disturbing signal is strong before presenting, thus the load governor of governing system is transformed, start to occur to disturbing signal in generator load sudden change and decay to the zero interference signal of inner shield during this period of time, allowing disturbing signal not enter load governor, to eliminate, steam turbine power is counter to be adjusted.
Description
Technical field
The invention belongs to power system governor system control field, be particularly related to Turbo-generator Set and provide a kind of at electromotor
The steam turbine power anti-method adjusted is prevented during sudden load change.
Background technology
Governing system is applied in power plant, for controlling rotating speed and the power of steam turbine.Governing system is mainly by frequency modulation control
Device, load governor and first stage pressure controller composition, when unit in spatial load forecasting state when, it be mainly by adjusting
Frequently controller and load governor complete.
Frequency modulation control device is the controller of an adoption rate control law, participates in electricity for generating set under spatial load forecasting state
Net primary frequency modulation and set up.Frequency modulation control device calculates the frequency difference generating reflection mains frequency fluctuation according to turbine speed signal
Signal, frequency difference signal controls computing through ratio, and gives the primary frequency modulation of instruction using its operation result as generator power
Corrected value, to control the requirement of the adaptation mains frequency of exerting oneself of generating set., frequency modulation control device consider input the dead time,
Control computing and output violent change.
Load governor is the power control circuit of coordinated control system, have employed the controller with proportional integral rule.Negative
Lotus controller is to utilize the revised steam turbine power of primary frequency modulation corrected value through the output of frequency modulation control device to give instruction and send out
The deviation of power of motor signal, carries out proportional plus integral control computing, and corrects further as correction factor using its operation result
The given instruction of steam turbine power, sends out power controlling the reality of electromotor.
Owing to the power signal of steam turbine is relatively difficult to measure, in actual application, governing system is frequently with dynamo power signal generation
For steam turbine power signal, in terms of static angular, the two is as broad as long, but analyzes from dynamic angle, the difference of the two
It is not the biggest.Owing to introducing the negative value of generator load signal in governing system, i.e. outer negative signal of disturbing participates in steam turbine
Regulation, therefore, occur in that the anti-tune of power when anticlimax load uprushed by electromotor.This appearance instead adjusted is to unit and electric power
The safe operation of system, brings the biggest harm.Due to the difference of the number of being won the confidence, the stability of different system is different, and
The more important thing is that the Load Rejection Characteristics of system just has very big difference.The basic reason created a difference be steam turbine power signal be anti-
Feedback signal, and dynamo power signal is disturbing signal, this signal force direction when removal of load makes servo valve
Open, be therefore degrading transient process.Simulation calculation is carried out for the above two kinds of regulation system, it can be seen that measure and send out
When power of motor is as power signal, its speed fling lifting than measure steam turbine power time much higher and also at the beginning of transient process
In stage beginning, the direction of motion of servomotor is not only not and turns down servo valve, is the most but out big servo valve, only at rotating speed
This phenomenon just can be overcome when being increased to certain numerical value.
Along with the enforcement in Xinjiang Yu northwest major network 750kV networking project, Xinjiang Power 750kV electric pressure rack enters one
Step extends, and system scale the most constantly expands, and the ability bearing fault impact the most progressively strengthens.But Xinjiang Power 750kV
Main grid structure is still in preliminarily forming the stage, and the contact between the electrical network of each department is weaker, and 750kV transformer station mostly is single
Main transformer, adds that Xinjiang is vast in territory, and Western Junggar, xinjiang Autonomous prosperous area northern, black and South Sinkiang are all incorporated to east boundary, east boundary with long chain type
The Hexi Corridor accessing northwest major network is also long chain type structure.In order to occur after anti-locking system catastrophe failure the most surely, move surely,
The problems such as heat is steady, Xinjiang the most multiple 750/220kV electromagnetic looped network has been carried out unlinking, between partial electric grid and major network
Only by single-point or 2 contacts, therefore after system 750kV rack occurs N-1 or N-2 fault, partial electric grid
With major network off-the-line islet operation, thus frequency stable problem will be brought to partial electric grid.
Xinjiang DianKeYuan is through the on-the-spot experimental test of multiple stage unit and scale-model investigation, and in grid simulation computational analysis
Middle discovery, what many power plant all existed in various degree counter adjusting phenomenon, if not changing the structure of governing system, eliminating anti-
Adjust, the safe operation of unit and power system will be brought adverse effect.During if it occur that partial electric grid off-the-line is run,
Multiple power plant occur that power is counter adjusts, and only accident conditions can be made more to deteriorate, so eliminating the anti-of governing system to adjust phenomenon also
Extremely urgent.
The anti-method adjusted of existing elimination is based primarily upon following theory:
Torque equilibrium equation formula according to steam turbine
P in formula (1)T、PEIt is respectively steam turbine power and generator load；J rotor of turbogenerator set
Rotary inertia, ω rotor velocity, ω0Rotor rated angular velocity,Rotor angle acceleration.
After transposition, can obtain
Formula (2) shows, if dynamo power signal just can be equal to steam turbine power signal plus rate signal.Institute
If to be re-introduced into the differential signal of rotating speed in systems, and suitably select the amplification of differential signal, theoretically
It is dynamo power signal correction can be become steam turbine power signal.
The anti-method adjusted of existing elimination mainly has following several:
1) introduce the differential signal of rotating speed in systems, dynamo power signal is corrected to steam turbine power signal；
2) measurement of power element and a delay component is made to be in series, with the change of deferred telegram power signal；
3) negative power differential signal is introduced in systems.
Existing method has that following some is not enough:
1) method 1 or 3 is owing to introducing rotating speed or power differential signal, it is necessary to carry out the amplification of differential signal
Adjusting, this parameter is poorly adjusted, and parameter is the least, DeGrain, and parameter is too big, the most easily interference signal
Amplify；
2) method 2 is actually by the response lag of governing system, individually uses the method still can exist a small amount of
Anti-tune effect.
For the most methodical deficiency, it is contemplated that observe anti-phenomenon of adjusting from other angles, and propose a kind of real in engineering
The scheme that in trampling, easily realization and parameter are easily adjusted.
Summary of the invention
The invention aims to solve governing system power anti-problem of adjusting during generator load sudden change, and propose one and pass through
The generator load sudden change start time shielding interference signal suppression anti-method adjusted of power.Start to occur in generator load sudden change
To interference signal attenuation to the zero interference signal of inner shield during this period of time, interference signal is allowed not enter the spatial load forecasting of governing system
Device, to eliminate, steam turbine power is counter to be adjusted.
The purpose of the application is achieved through the following technical solutions.
It is a kind of by the generator load sudden change start time shielding interference signal suppression anti-method adjusted of power, it is characterised in that:
Start to occur to disturbing signal in generator load sudden change and decay to the zero interference signal of inner shield during this period of time, allow disturbance believe
Number not entering the load governor of governing system, to eliminate, steam turbine power is counter to be adjusted.
It is a kind of by the generator load sudden change start time shielding interference signal suppression anti-method adjusted of power, it is characterised in that
Described method comprises following four step:
(1) measure dynamo power signal, turbine speed signal in real time, and obtain steam turbine power from governing system in real time
Given instruction, calculating generator power instantaneous rate of change, steam turbine power given instruction instantaneous rate of change, steam turbine power are given
Determine instruction variable quantity within the setting time, turbine speed instantaneous rate of change；
(2) whether caused by generator load sudden change according to the sudden change of following Rule of judgment identification generator power, described judgement bar
Part includes:
Rule of judgment one: whether generator power instantaneous rate of change exceedes the generator power instantaneous rate of change threshold range of regulation,
Rule of judgment two: it is the most instantaneous in the given instruction of steam turbine power of regulation that steam turbine power gives instruction instantaneous rate of change
In rate of change threshold range,
Rule of judgment three: whether steam turbine power gives instruction variable quantity within the setting time in the variable quantity threshold value specified
In the range of,
Rule of judgment four: whether turbine speed instantaneous rate of change exceedes the turbine speed instantaneous rate of change threshold range of regulation；
(3) when in step (2) 4 Rule of judgment be true time, i.e. generator power instantaneous rate of change exceed regulation send out
Power of motor instantaneous rate of change threshold range, and steam turbine power give instruction instantaneous rate of change regulation steam turbine power
In given instruction instantaneous rate of change threshold range, and steam turbine power gives instruction variable quantity within the setting time on rule
In fixed variable quantity threshold range, and turbine speed instantaneous rate of change exceedes the turbine speed instantaneous rate of change threshold of regulation
During value scope, then judge that generator power sudden change is caused, to the load governor of governing system by generator load sudden change
Assigning to export and keep instruction, generator power is counter to be adjusted to disturb signal to suppress with shielding, the frequency modulation control device to governing system simultaneously
According to frequency difference normal regulating；
(4) it is true time when 4 Rule of judgment differences in step (2), it is judged that generator power sudden change is not by electromotor
Sudden load change causes, and according to load governor deviation, the load governor of governing system is inputted normal regulating, exchanges simultaneously
The frequency modulation control device of speed system is according to frequency difference normal regulating.
The present invention further preferred techniques below scheme.
In the Rule of judgment one of described step (2), when generator power instantaneous rate of change absolute value is more than the electromotor merit of regulation
During rate instantaneous rate of change threshold value absolute value, then it is assumed that having exceeded the generator power instantaneous rate of change threshold range of regulation, this is sentenced
Broken strip part one is true；
When generator power instantaneous rate of change threshold is more than zero, i.e. generator power instantaneous rate of change positive direction is out-of-limit, now
Threshold value can in the range of+0.5% to+6% electromotor specified active power/second value；
When generator power instantaneous rate of change threshold is less than zero, i.e. generator power instantaneous rate of change negative direction is out-of-limit, now
Threshold value can in the range of-0.5% to-6% electromotor specified active power/second value.
In the Rule of judgment two of described step (2), when steam turbine power given instruction instantaneous rate of change absolute value is not more than regulation
Steam turbine power given instruction instantaneous rate of change threshold value absolute value time, then it is assumed that described steam turbine power is given instructs instantaneous change
Rate is in the steam turbine power given instruction instantaneous rate of change threshold range of regulation, and this Rule of judgment two is true；
When steam turbine power given instruction instantaneous rate of change is more than zero, just representing steam turbine power given instruction instantaneous rate of change
Direction is out-of-limit, and now steam turbine power given instruction instantaneous rate of change threshold value can be specified meritorious at+0.05% to+4% electromotor
Value in the range of power/second, preferably steam turbine power given instruction instantaneous rate of change threshold value is+2% specified wattful power of electromotor
Rate/second；
When steam turbine power given instruction instantaneous rate of change is less than zero, represent that steam turbine power given instruction instantaneous rate of change is born
Direction is out-of-limit, and now steam turbine power given instruction instantaneous rate of change threshold value can be specified meritorious at-0.05% to-4% electromotor
Value in the range of power/second, preferably steam turbine power given instruction instantaneous rate of change threshold value is-2% specified wattful power of electromotor
Rate/second.
In the Rule of judgment three of described step (2), when steam turbine power gives the absolute value no more than regulation of the variable quantity of instruction
The absolute value of variable quantity threshold value time, then it is assumed that the variable quantity of described steam turbine power in the variable quantity threshold range of regulation,
This Rule of judgment three is true；
When steam turbine power given instruction variable quantity is more than zero, steam turbine power given instruction variable quantity positive direction is out-of-limit, this
Time the set time be 1 second to 20 seconds, preferably 5 seconds, described variable quantity threshold value had+0.5% to+8% electromotor is specified
Value in merit power bracket, is preferably+4% specified active power of electromotor；
When steam turbine power given instruction variable quantity is less than zero, steam turbine power given instruction variable quantity negative direction is out-of-limit, this
Time the set time be 1 second to 20 seconds, preferably 5 seconds, described variable quantity threshold value had-0.5% to-8% electromotor is specified
Value in merit power bracket, is preferably-4% specified active power of electromotor.
In the Rule of judgment four of described step (2), when described turbine speed instantaneous rate of change absolute value is more than the steamer of regulation
During the absolute value of machine rotating speed instantaneous rate of change threshold value, then it is assumed that turbine speed instantaneous rate of change has exceeded the steam turbine of regulation and turned
Speed instantaneous rate of change threshold range, this Rule of judgment four is true；When turbine speed instantaneous rate of change is more than zero, steam turbine
Rotating speed transient change positive direction is out-of-limit, described turbine speed instantaneous rate of change threshold value value between+1 to+60 revs/min/point,
Preferably+10 revs/min/points；
When turbine speed instantaneous rate of change is less than zero, turbine speed transient change negative direction is out-of-limit, and described steam turbine turns
Speed instantaneous rate of change threshold value value between-1 to-60 revs/min/point, preferably-10 revs/min/points.
Under output in described step (3) keeps instruction four Rule of judgment starts for true time in step (2) the most simultaneously
Reaching, output keeps the persistent period of instruction to perform according to the duration parameters preset, the duration parameters value model preset
Enclosing is 0.1 second to 1.0 seconds, and output keeps instruction to cancel after the persistent period terminates, and in default blocking time not
Again can assign output to load governor and keep instruction, the blocking time parameter value scope preset is 10 seconds to 300 seconds.
In described step (3), the load control of governing system can be made by constant 0 replaces load governor deviation input
Device processed output keeps constant.
The application contrasts prior art and has a following innovative point:
1) observe from time domain and suppress counter and adjust phenomenon；
2) observe from the control law of PID self and suppress counter and adjust phenomenon.
The application contrasts prior art and has a following remarkable advantage:
1) for debugging system improved method step simply, the most error-prone, easily realize in engineering practice；
2) parameter involved by the scheme of the application is easily adjusted, highly versatile；
3) the application only comes into force when generator load is undergone mutation, in short-term to original governing system control in other times section
The not impact of system strategy.
4) the application will not introduce interference signal, more will not amplify interference signal.
Accompanying drawing explanation
Fig. 1 is the anti-FB(flow block) adjusting method of suppression power disclosed by the invention；
Fig. 2 is that the present invention suppresses the anti-logic diagram adjusting method of power；
Wherein: PEDynamo power signal, PrefSteam turbine power give instruction, ω turbine speed,—
Generator power instantaneous rate of change,Steam turbine power given instruction instantaneous rate of change, Δ PrefSteam turbine power gives
Instruction variable quantity,Turbine speed instantaneous rate of change, 1 velocity module, 2 comparison modules, 3 compare definite value and set
Cover half block, 4 comparison modules, 5 compare definite value setting module, 6 or door, 7 velocity module, 8 comparison modules, 9
Relatively definite value setting module, 10 comparison modules, 11 compare definite value setting module, 12 nor gates, 13 single orders are used to
Property module, 14 lead-lag modules, 15 lead-lag modules, 16 comparison modules, 17 compare definite value setting module,
18 comparison modules, 19 compare definite value setting module, 20 nor gates, 21 velocity module, 22 comparison modules, 23
Relatively definite value setting module, 24 comparison modules, 25 compare definite value setting module, 26 or door, 27 with door, 28
Pulse timing module, 29 locking timing definite value setting modules, 30 pulse timing modules, 31 holding timing definite values set
Cover half block, 32 controlled switching switches, 33 constant assignment modules, 34 load governor deviation input modules, 35 negative
Lotus controller PID module.
Detailed description of the invention
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
The basic thought of the inventive method is that to cause the counter interference signal adjusted of steam turbine power be spontaneous prominent at generator external load
Produce during change, and the generation moment interference signal that suddenlys change is the strongest, rapid decay over time, it is less than in outside sudden load change amount
Disappear equal to during the exporting change amount of frequency modulation control device.Load governor is worked by this interference signal, does not has frequency modulation controller
There is effect, as long as so load governor output being kept constant when generator external load spontaneous mutation, just can will disturb
Signal shielding filters, and in time load governor is recovered normal regulating, thus when disturbing signal attenuation to zero the most again
Can solve that steam turbine power is counter adjusts problem.
In the inventive method, most important parameter is that load governor output keeps constant time duration.According to interference letter
Before number presenting strong after weak feature, effect of exerting one's influence at once when disturbing signal to produce is the most obvious, more arrives anaphase effect more
Weak.Even if it can thus be appreciated that there is certain error in actual adjusting in this time parameter, as long as this time duration can cover
To the front most times disappeared when interference signal starts to produce, poor for solving the anti-effect adjusted of steam turbine power
It is not the least.So in Practical Project, this parameter is the most relatively easily adjusted, highly versatile.
Use being divided by the generator load sudden change start time shielding interference signal suppression anti-method adjusted of power shown in accompanying drawing 1
Four steps:
(1) measure dynamo power signal, turbine speed signal in real time, and obtain steam turbine power from governing system in real time
Given instruction, calculating generator power instantaneous rate of change, steam turbine power given instruction instantaneous rate of change, steam turbine power are given
Determine instruction variable quantity within the setting time, turbine speed instantaneous rate of change；(2) according to following Rule of judgment identification
Whether generator power sudden change is caused by generator load sudden change, and described Rule of judgment includes:
Rule of judgment one: whether generator power instantaneous rate of change exceedes the generator power instantaneous rate of change threshold range of regulation,
When generator power instantaneous rate of change absolute value is more than the generator power instantaneous rate of change threshold value absolute value of regulation, then it is assumed that
Having exceeded the generator power instantaneous rate of change threshold range of regulation, this Rule of judgment one is true；
When generator power instantaneous rate of change threshold is more than zero, i.e. generator power instantaneous rate of change positive direction is out-of-limit, now
Threshold value can in the range of+0.5% to+6% electromotor specified active power/second value, preferred power generator power transient change
Rate threshold value was+4% electromotor specified active power/second.
When generator power instantaneous rate of change threshold is less than zero, i.e. generator power instantaneous rate of change negative direction is out-of-limit, now
Threshold value can in the range of-0.5% to-6% electromotor specified active power/second value, preferred power generator power transient change
Rate threshold value was-4% electromotor specified active power/second.
Rule of judgment two: it is the most instantaneous in the given instruction of steam turbine power of regulation that steam turbine power gives instruction instantaneous rate of change
In rate of change threshold range, when steam turbine power give instruction instantaneous rate of change absolute value be not more than regulation steam turbine power to
Surely during instruction instantaneous rate of change threshold value absolute value, then it is assumed that described steam turbine power gives the instruction instantaneous rate of change vapour in regulation
In turbine power given instruction instantaneous rate of change threshold range, this Rule of judgment two is true；
When steam turbine power given instruction instantaneous rate of change is more than zero, just representing steam turbine power given instruction instantaneous rate of change
Direction is out-of-limit, and now steam turbine power given instruction instantaneous rate of change threshold value can be specified meritorious at+0.05% to+4% electromotor
Value in the range of power/second, preferably steam turbine power given instruction instantaneous rate of change threshold value is+2% specified wattful power of electromotor
Rate/second；
When steam turbine power given instruction instantaneous rate of change is less than zero, represent that steam turbine power given instruction instantaneous rate of change is born
Direction is out-of-limit, and now steam turbine power given instruction instantaneous rate of change threshold value can be specified meritorious at-0.05% to-4% electromotor
Value in the range of power/second, preferably steam turbine power given instruction instantaneous rate of change threshold value is-2% specified wattful power of electromotor
Rate/second；
Rule of judgment three: the given instruction of steam turbine power sets the time one, and whether interior variable quantity is at the variable quantity threshold specified
In the range of value, when steam turbine power gives the absolute value of the absolute value no more than variable quantity threshold value of regulation of the variable quantity of instruction
Time, then it is assumed that the variable quantity of described steam turbine power is in the variable quantity threshold range of regulation, and this Rule of judgment three is true；
When steam turbine power given instruction variable quantity is more than zero, steam turbine power given instruction variable quantity positive direction is out-of-limit, this
Time the set time be 1 second to 20 seconds, preferably 5 seconds, described variable quantity threshold value had+0.5% to+8% electromotor is specified
Value in merit power bracket, is preferably+4% specified active power of electromotor；
When steam turbine power given instruction variable quantity is less than zero, steam turbine power given instruction variable quantity negative direction is out-of-limit, this
Time the set time be 1 second to 20 seconds, preferably 5 seconds, described variable quantity threshold value is specified at-0.5% to-8% electromotor
Value in the range of active power, is preferably-4% specified active power of electromotor；
Rule of judgment four: whether turbine speed instantaneous rate of change exceedes the turbine speed instantaneous rate of change threshold range of regulation；
When described turbine speed instantaneous rate of change absolute value is more than the absolute value of the turbine speed instantaneous rate of change threshold value of regulation,
Then think that turbine speed instantaneous rate of change has exceeded the turbine speed instantaneous rate of change threshold range of regulation, this Rule of judgment
Four is true；When turbine speed instantaneous rate of change is more than zero, turbine speed transient change positive direction is out-of-limit, described steamer
Machine rotating speed instantaneous rate of change threshold value value between+1 to+60 revs/min/point, preferably+10 revs/min/points；
When turbine speed instantaneous rate of change is less than zero, turbine speed transient change negative direction is out-of-limit, and described steam turbine turns
Speed instantaneous rate of change threshold value value between-1 to-60 revs/min/point, preferably-10 revs/min/points；
(3) when in step (2) 4 Rule of judgment be true time, i.e. generator power instantaneous rate of change exceed regulation send out
Power of motor instantaneous rate of change threshold range, and steam turbine power give instruction instantaneous rate of change regulation steam turbine power
In given instruction instantaneous rate of change threshold range, and steam turbine power gives instruction variable quantity within the setting time on rule
In fixed variable quantity threshold range, and turbine speed instantaneous rate of change exceedes the turbine speed instantaneous rate of change threshold of regulation
During value scope, it is judged that generator power sudden change is caused, under the load governor of governing system by generator load sudden change
Reaching to export and keep instruction, generator power is counter to be adjusted to disturb signal to suppress with shielding, presses the frequency modulation control device of governing system simultaneously
According to frequency difference normal regulating；
Under output in described step (3) keeps instruction four Rule of judgment starts for true time in step (2) the most simultaneously
Reaching, output keeps the persistent period of instruction to perform according to the duration parameters preset, the duration parameters value model preset
Enclosing is 0.1 second to 1.0 seconds, and output keeps instruction to cancel after the persistent period terminates, and in default blocking time not
Again can assign output to load governor and keep instruction, the blocking time parameter value scope preset is 10 seconds to 300 seconds.
In described step (3), the load control of governing system can be made by constant 0 replaces load governor deviation input
Device processed output keeps constant.
(4) it is true time when 4 Rule of judgment differences in step (2), it is judged that generator power sudden change is not by electromotor
Sudden load change causes, and according to load governor deviation, the load governor of governing system is inputted normal regulating, exchanges simultaneously
The frequency modulation control device of speed system is according to frequency difference normal regulating.
Embodiment 1
2 it is described further below in conjunction with the accompanying drawings.
The anti-logic diagram adjusted of power is suppressed by generator load sudden change start time shielding interference signal, including: electromotor
Power signal PE, steam turbine power given instruction Pref, turbine speed ω, generator power instantaneous rate of changeVapour
Turbine power given instruction instantaneous rate of changeSteam turbine power given instruction variation delta Pref, the instantaneous change of turbine speed
RateVelocity module 1, comparison module 2, compare definite value setting module 3, comparison module 4, compare definite value set mould
Block 5 or door 6, velocity module 7, comparison module 8, compare definite value setting module 9, comparison module 10, compare definite value and set
Cover half block 11, nor gate 12, one order inertia module 13, lead-lag module 14, lead-lag module 15, comparison module
16, compare definite value setting module 17, comparison module 18, compare definite value setting module 19, nor gate 20, velocity module 21,
Comparison module 22, compare definite value setting module 23, comparison module 24, compare definite value setting module 25 or door 26 and door
27, pulse timing module 28, locking timing definite value setting module 29, pulse timing module 30, holding timing definite value set
Module 31, controlled switching switch 32, constant assignment module 33, load governor deviation input module 34, load governor
PID module 35, the input of described velocity module 1 connects dynamo power signal PE, it is output as the instantaneous change of generator power
RateThe outfan of described velocity module 1 connects the input of comparison module 2, described compares definite value setting module 3
Connecting the input of comparison module 2, for setting the comparison definite value of comparison module 2, the outfan of described comparison module 2 is even
Being connected to or the input of door 6, the outfan of described velocity module 1 connects the input of comparison module 4, described compares definite value
Setting module 5 connects the input of comparison module 4, for setting the comparison definite value of comparison module 4, described comparison module 4
Outfan be connected to or the input of door 6, described or door 6 outfan is connected to and the input of door 27, described speed
The input of rate module 7 connects steam turbine power given instruction Pref, it is output as steam turbine power given instruction instantaneous rate of changeThe outfan of described velocity module 7 connects the input of comparison module 8, and the described definite value setting module 9 that compares connects
The input of comparison module 8, for setting the comparison definite value of comparison module 8, the outfan of described comparison module 8 is connected to
The input of nor gate 12, the outfan of described velocity module 7 connects the input of comparison module 10, described compares definite value
Setting module 11 connects the input of comparison module 10, for setting the comparison definite value of comparison module 10, described comparison module
The outfan of 10 is connected to the input of nor gate 12, and the outfan of described nor gate 12 is connected to and the input of door 27,
The input of described one order inertia module 13 connects steam turbine power given instruction Pref, described one order inertia module 13 defeated
Going out end and connect the input of lead-lag module 14, the outfan of described lead-lag module 14 connects lead-lag module 15
Input, described lead-lag module 15 is output as steam turbine power given instruction variation delta Pref, described the most stagnant
The outfan of rear module 15 connects the input of comparison module 16, and the described definite value setting module 17 that compares connects comparison module
The input of 16, for setting the comparison definite value of comparison module 16, the outfan of described comparison module 16 is connected to nor gate
The input of 20, the outfan of described lead-lag module 15 connects the input of comparison module 18, and the described definite value that compares sets
Cover half block 19 connects the input of comparison module 18, for setting the comparison definite value of comparison module 18, described comparison module
The outfan of 18 is connected to the input of nor gate 20, and the outfan of described nor gate 20 is connected to and the input of door 27,
The input of described velocity module 21 connects turbine speed ω, is output as turbine speed instantaneous rate of changeDescribed speed
The outfan of rate module 21 connects the input of comparison module 22, and the described definite value setting module 23 that compares connects comparison module
The input of 22, for setting the comparison definite value of comparison module 22, the outfan of described comparison module 22 is connected to or door
The input of 26, the outfan of described velocity module 21 connects the input of comparison module 24, and the described definite value that compares sets mould
Block 25 connects the input of comparison module 24, for setting the comparison definite value of comparison module 24, described comparison module 24
Outfan is connected to or the input of door 26, and described or door 26 outfan is connected to and the input of door 27, described with
The outfan of door 27 is connected to the input of pulse timing module 28, and described locking timing definite value setting module 29 connects arteries and veins
Rush the input of timing module 28, for setting the pulse duration of pulse timing module 28, described pulse timing module
The outfan of 28 is connected to the input of pulse timing module 30, and described holding timing definite value setting module 31 connects pulsimeter
Time module 30 input, for setting pulse duration of pulse timing module 30, described pulse timing module 30
Outfan be connected to controlled switching switch 32 control end, the outfan of described constant assignment module 33 and load governor
The outfan of deviation input module 34 be connected to controlled switching switch 32 input, described controlled switching switch 32 defeated
Go out end and be connected to the input of load governor PID module 35.
The transmission function of described one order inertia module 13 is:
Wherein, K1For proportionality coefficient, D1For inertia time constant.
The transmission function of described lead-lag module 14 is:
Wherein, K2For differential amplification coefficient, D2For inertia time constant.
The transmission function of described lead-lag module 15 is:
Wherein, K3For differential amplification coefficient, D3For inertia time constant.
By one order inertia module 13 by given for steam turbine power instruction standardization, will the different steam turbine merit of amount of capacity
Rate gives appointment and is all converted in the scope of 0 to 100, and steam turbine power gives instruct through a short time stagnant
After, match for the action response with steam turbine valve.
By lead-lag module 14, the steam turbine power after mark one is given the variable quantity that instruction extracts in certain time,
By lead-lag module 15, the steam turbine power after mark one is given instruction variable quantity within a certain period of time to be accelerated,
Change its rate of change to shorten its period of change, make the rate of change of variable quantity within a certain period of time and steam turbine power to
The rate of change of fixed instruction matches.
Carried out in four steps by the generator load sudden change start time shielding interference signal suppression anti-method adjusted of power:
(1) measure dynamo power signal, turbine speed signal in real time, and obtain steamer in real time from CCS tuning controller
The given instruction of acc power, calculates generator power instantaneous rate of change, steam turbine power given instruction instantaneous rate of change, steam turbine
Power gives instruction variable quantity within the setting time, turbine speed instantaneous rate of change；
Described dynamo power signal PEIt is that three dynamo power signal kind numerical values recited are in that middle electromotor merit
Rate signal, dynamo power signal PEGenerator power instantaneous rate of change is obtained after a velocity module 1
Described steam turbine power gives instruction for value after rate limit in CCS tuning controller, and steam turbine power gives
Instruction PrefSteam turbine power given instruction instantaneous rate of change is obtained after a velocity module 7
Described steam turbine power given instruction PrefSequentially pass through one order inertia module 13, lead-lag module 14, lead-lag
Steam turbine power given instruction variation delta P is obtained after module 15ref；
Described turbine speed signal ω is three turbine speed signals values after three take middle logical judgment, turbine speed
Signal ω obtains turbine speed instantaneous rate of change after a velocity module 21
(2) whether caused by generator load sudden change according to the sudden change of following Rule of judgment identification generator power, described judgement bar
Part includes:
Rule of judgment one: whether generator power instantaneous rate of change exceedes the generator power instantaneous rate of change threshold range of regulation.
When generator power instantaneous rate of changeTime, by comparison module 2 with compare definite value setting module 3 and constitute generating
Acc power instantaneous rate of changeThe multilevel iudge that positive direction is the most out-of-limit；When generator power instantaneous rate of changeTime,
By comparison module 4 with compare definite value setting module 5 and constitute generator power instantaneous rate of changeNegative direction is the most out-of-limit
Multilevel iudge.When being output as true time, represent generator power instantaneous rate of changePositive direction is out-of-limit, when comparison module 4 is defeated
Go out for true time, represent generator power instantaneous rate of changeNegative direction is out-of-limit.Comparison module 2 or comparison module 4 are arbitrary defeated
Go out for true time, or door 6 is output as very, otherwise or door 6 is output as vacation.When or door 6 be output as really representing condition 1 and set up,
When or door 6 be output as fictitious time, representing condition 1 is false.
Wherein:
Relatively the output definite value of definite value setting module 3 was+4% electromotor specified active power/second, and optional span is+0.5%
To+6% electromotor specified active power/second；
Relatively the output definite value of definite value setting module 5 was-4% electromotor specified active power/second, and optional span is-0.5%
To-6% electromotor specified active power/second；
Rule of judgment two: it is the most instantaneous in the given instruction of steam turbine power of regulation that steam turbine power gives instruction instantaneous rate of change
In rate of change threshold range.
When steam turbine power given instruction instantaneous rate of changeTime, by comparison module 8 with compare definite value setting module 9
Constitute steam turbine power given instruction instantaneous rate of changeThe multilevel iudge that positive direction is the most out-of-limit；When steam turbine power is given
Surely instantaneous rate of change is instructedTime, by comparison module 10 with compare definite value setting module 11 and constitute steam turbine power
Given instruction instantaneous rate of changeThe multilevel iudge that negative direction is the most out-of-limit.When comparison module 8 is output as true time, represent vapour
Turbine power given instruction instantaneous rate of changePositive direction is out-of-limit, when comparison module 10 is output as true time, represents steam turbine
Power given instruction instantaneous rate of changeNegative direction is out-of-limit.Comparison module 8 or comparison module 10 is arbitrary is output as true time,
Nor gate 12 is output as vacation, and otherwise nor gate 12 is output as very.Set up when nor gate 12 is output as really representing condition 2,
When nor gate 12 is output as fictitious time, representing condition 2 is false.
Wherein:
Relatively the output definite value of definite value setting module 9 was+2% electromotor specified active power/second, and optional span is
+ 0.05% to+4% electromotor specified active power/second；
Relatively the output definite value of definite value setting module 11 was-2% electromotor specified active power/second, and optional span is
-0.05% to-4% electromotor specified active power/second；
Rule of judgment three: whether steam turbine power gives instruction variable quantity within the setting time in the variable quantity threshold value specified
In the range of.
When steam turbine power given instruction variation delta PrefDuring ＞ 0, by comparison module 16 with compare definite value setting module 17 structure
Steam turbine power given instruction variation delta P in pairsrefThe multilevel iudge that positive direction is the most out-of-limit；When the given instruction of steam turbine power
Variation delta PrefDuring ＜ 0, comparison module 18 constitute instruction change given to steam turbine power with comparing definite value setting module 19
Change amount Δ PrefThe multilevel iudge that negative direction is the most out-of-limit.When comparison module 16 is output as true time, represent steam turbine power and give
Instruction variation delta PrefPositive direction is out-of-limit, when comparison module 18 is output as true time, represents steam turbine power given instruction change
Amount Δ PrefNegative direction is out-of-limit.Comparison module 16 or the arbitrary true time that is output as of comparison module 18, nor gate 20 is output as vacation,
Otherwise nor gate 20 is output as very.Set up, when nor gate 20 is output as when nor gate 20 is output as really representing condition 3
Fictitious time, representing condition 3 is false.
Wherein:
The Proportional coefficient K of first order inertial loop 131ForInertia time constant D1It it is 0.02 second；
The differential amplification coefficient K of lead-lag module 142Be 5, inertia time constant D2It it is 5 seconds；
The differential amplification coefficient K of lead-lag module 153Be 5, inertia time constant D3It it is 5 seconds；
Relatively definite value setting module 17 is output as+4% specified active power of electromotor, and optional span is+0.5% to+8%
The specified active power of electromotor；
Relatively definite value setting module 19 is output as-4% specified active power of electromotor, and optional span is+0.5% to+8%
The specified active power of electromotor.
Rule of judgment four: whether turbine speed instantaneous rate of change exceedes the turbine speed instantaneous rate of change threshold range of regulation；
Turbine speed ω is that turbine speed letter selecting numerical values recited to be in centre in three turbine speed signals
Number, this value obtains turbine speed instantaneous rate of change after a velocity module 21WhenTime, by comparing mould
Block 22 and compare definite value setting module 23 and constitute turbine speed instantaneous rate of changeThe most out-of-limit relatively the sentencing of positive direction
Disconnected；WhenTime, by comparison module 24 with compare definite value setting module 25 and constitute turbine speed instantaneous rate of change
The multilevel iudge that negative direction is the most out-of-limit.When comparison module 22 is output as true time, represent turbine speed instantaneous rate of change
Positive direction is out-of-limit, when comparison module 24 is output as true time, represents turbine speed instantaneous rate of changeNegative direction is out-of-limit.Ratio
Compared with the arbitrary true time that is output as of module 22 or comparison module 24, or door 26 is output as very, otherwise or door 26 is output as vacation.When
Or door 26 is output as really representing condition 4 and sets up, when or door 26 be output as fictitious time, representing condition 4 is false.
Wherein:
That compares definite value setting module 23 is output as+10 revs/min/points, and optional span is+1 to+60 revs/min/point；
That compares definite value setting module 25 is output as-10 revs/min/points, and optional span is-1 to-60 revs/min/point.
The result of Rule of judgment 1 is or the output of door 6, it is judged that the result of condition 2 is the output of nor gate 12, it is judged that condition
The result of 3 is the output of nor gate 20, it is judged that the result of condition 4 is or the output of door 26, these 4 module output conducts
With the input of door 27, being only true time when 4 module outputs, namely Rule of judgment 1,2,3,4 is true time,
Output with door 27 is just true, and otherwise door 27 is output as vacation.
Being output as very with door 27, it is true for representing step (2) judged result, and otherwise step (2) judged result is false.
(3) when in step (2) 4 Rule of judgment be true time, i.e. generator power instantaneous rate of change exceed regulation send out
Power of motor instantaneous rate of change threshold range, and steam turbine power gives instruction instantaneous rate of change and exceedes the steam turbine merit of regulation
Rate gives instruction instantaneous rate of change threshold range, and steam turbine power gives instruction variable quantity within the setting time and exceedes
The variable quantity threshold range of regulation, and turbine speed instantaneous rate of change exceedes the turbine speed instantaneous rate of change threshold of regulation
During value scope, it is judged that generator power sudden change is caused by generator load sudden change, assign output to load governor and keep
Instruction, generator power is counter to be adjusted, simultaneously to frequency modulation controller according to frequency difference normal regulating to disturb signal to suppress with shielding；
Under output in described step (3) keeps instruction four Rule of judgment starts for true time in step (2) the most simultaneously
Reaching, output keeps the persistent period of instruction to perform according to the duration parameters preset, the duration parameters value model preset
Enclosing is 0.1 second to 1.0 seconds, and output keeps instruction to cancel after the persistent period terminates, and in default blocking time not
Again can assign output to load governor and keep instruction, the blocking time parameter value scope preset is 10 seconds to 300 seconds.
Step (2) judged result is true, is output as very, being otherwise output as vacation with door 27 with door 27.Pulse is passed through with door 27
Timing module 28 and locking timing definite value setting module 29 achieve with door 27 first for true time, trigger one longer time
Between pulse signal, due to pulse timing module 28 only detecting to genuine variable condition from vacation its input signal,
Even if within the persistent period of pulse timing the input signal of pulse timing module 28 exist multiple from vacation to genuine variable condition,
Also will not change pulse timing module 28 and be output as genuine state.So pulse timing module 28 achieves in locking timing
To that may be present with door 27 repeatedly be converted into once to really exporting from vacation in the persistent period that definite value setting module 29 sets
From vacation to really exporting, and pulse timing module 28 only to door 27 first from vacation to really exporting response.
Pulse timing module 28 achieves output holding by pulse timing module 30 and holding timing definite value setting module 31 and refers to
Assigning of order, the output of pulse timing module 30 i.e. exports holding instruction, keeps timing definite value setting module 31 to set defeated
Go out to keep the persistent period of instruction.The output of pulse timing module 30 i.e. exports holding instruction.
The persistent period of output holding instruction can be according to generating set governing system model actual measurement parameter and generating set location
Simulation analysis result under the various accident condition of territory electrical network draws.Can be by various accident condition interfering signal durations
Length simulation calculation out, then takes its intermediate value and keeps as output the persistent period of instruction, i.e. keep timing definite value to set mould
The setting value of block 31.
Wherein:
Locking timing definite value setting module 29 is output as 10 seconds, and optional span is 10 seconds to 300 seconds；
Keeping timing definite value setting module 31 to be output as 0.3 second, optional span is 0.1 second to 1.0 seconds.
In described step (3), load governor output can be made to protect by constant 0 replaces load governor deviation input
Hold constant.
Pulse timing module 30 is constant by the input signal of controlled switching switch 32 control load governor PID module 35
Assignment module 33 or load governor deviation input module 34.When the input signal selected is constant assignment module 33,
Owing to the output valve of constant assignment module 33 is 0, according to the Computing Principle of PID module, load governor PID module 35
Output will keep constant；When the input signal selected is load governor deviation input module 34, then load control
Device PID module 35 processed regulates according to normal mode.
When in step (2), 4 Rule of judgment are true time simultaneously, being output as very with door 27, pulse timing module 30 controls can
Control switching switch 32 selectivity constant assignment modules 33 are as the input signal of load governor PID module 35.Due to constant
The output valve of assignment module 33 is 0, and according to the Computing Principle of PID module, the output of load governor PID module 35 will
Can keep constant.When the output of pulse timing module 30 is cancelled after the persistent period terminates, controlled switching switch 32 selection is negative
Lotus controller deviation input module 34 is as the input signal of load governor PID module 35.
Frequency modulation control device is not owing to changing, so always according to frequency difference normal regulating.
Wherein:
Constant assignment module 33 is output as 0；
(4) it is true time when 4 Rule of judgment differences in step (2), it is judged that generator power sudden change is not by electromotor
Sudden load change causes, and according to load governor deviation, load governor is inputted normal regulating, presses frequency modulation controller simultaneously
According to frequency difference normal regulating.
It is true time when 4 Rule of judgment differences in step (2), is output as vacation with door 27, pulse timing module 30 defeated
Go out i.e. output keeps instruction to be false always, and controlled switching switch 32 selects load governor deviation input module 34 conduct always
The input signal of load governor PID module 35 is controlled.
Frequency modulation control device is not owing to changing, so always according to frequency difference normal regulating.
It is above present applicant to combine Figure of description and embodiments herein is described in detail and describes, but
Being to it should be appreciated by those skilled in the art that the preferred embodiment that above example is only the application, detailed explanation is simply
Help reader is more fully understood that present invention spirit, and not restriction to the application protection domain, on the contrary, any based on this
Any improvement or modification that application spirit is made all should fall within the protection domain of the application.
Claims (10)
1. one kind is suppressed the anti-method adjusted of power by generator load sudden change start time shielding interference signal, it is characterised in that
Described method comprises following four step:
(1) measure dynamo power signal, turbine speed signal in real time, and obtain steam turbine power from governing system in real time
Given instruction, calculating generator power instantaneous rate of change, steam turbine power given instruction instantaneous rate of change, steam turbine power are given
Determine instruction variable quantity within the setting time, turbine speed instantaneous rate of change；
(2) whether caused by generator load sudden change according to the sudden change of following Rule of judgment identification generator power, described judgement bar
Part includes:
Rule of judgment one: whether generator power instantaneous rate of change exceedes the generator power instantaneous rate of change threshold range of regulation,
Rule of judgment two: it is the most instantaneous in the given instruction of steam turbine power of regulation that steam turbine power gives instruction instantaneous rate of change
In rate of change threshold range,
Rule of judgment three: whether steam turbine power gives instruction variable quantity within the setting time in the variable quantity threshold value specified
In the range of,
Rule of judgment four: whether turbine speed instantaneous rate of change exceedes the turbine speed instantaneous rate of change threshold range of regulation；
(3) when in step (2) 4 Rule of judgment be true time, i.e. generator power instantaneous rate of change exceed regulation send out
Power of motor instantaneous rate of change threshold range, and steam turbine power give instruction instantaneous rate of change regulation steam turbine power
In given instruction instantaneous rate of change threshold range, and steam turbine power gives instruction variable quantity within the setting time on rule
In fixed variable quantity threshold range, and turbine speed instantaneous rate of change exceedes the turbine speed instantaneous rate of change threshold of regulation
During value scope, then judge that generator power sudden change is caused, to the load governor of governing system by generator load sudden change
Assigning to export and keep instruction, generator power is counter to be adjusted to disturb signal to suppress with shielding, the frequency modulation control device to governing system simultaneously
According to frequency difference normal regulating；
(4) it is true time when 4 Rule of judgment differences in step (2), it is judged that generator power sudden change is not by electromotor
Sudden load change causes, and according to load governor deviation, the load governor of governing system is inputted normal regulating, exchanges simultaneously
The frequency modulation control device of speed system is according to frequency difference normal regulating.
The shielding interference signal suppression anti-method adjusted of power the most according to claim 1, it is characterised in that:
In the Rule of judgment one of described step (2), when generator power instantaneous rate of change absolute value is more than the electromotor merit of regulation
During rate instantaneous rate of change threshold value absolute value, then it is assumed that having exceeded the generator power instantaneous rate of change threshold range of regulation, this is sentenced
Broken strip part one is true；
When generator power instantaneous rate of change threshold is more than zero, i.e. generator power instantaneous rate of change positive direction is out-of-limit, now
Threshold value is value in the range of+0.5% to+6% electromotor specified active power/second；
When generator power instantaneous rate of change threshold is less than zero, i.e. generator power instantaneous rate of change negative direction is out-of-limit, now
Threshold value is value in the range of-0.5% to-6% electromotor specified active power/second.
The shielding interference signal suppression anti-method adjusted of power the most according to claim 1, it is characterised in that:
In the Rule of judgment two of described step (2), when steam turbine power given instruction instantaneous rate of change absolute value is not more than regulation
Steam turbine power given instruction instantaneous rate of change threshold value absolute value time, then it is assumed that described steam turbine power is given instructs instantaneous change
Rate is in the steam turbine power given instruction instantaneous rate of change threshold range of regulation, and this Rule of judgment two is true；
When steam turbine power given instruction instantaneous rate of change is more than zero, just representing steam turbine power given instruction instantaneous rate of change
Direction is out-of-limit, now steam turbine power given instruction instantaneous rate of change threshold value+0.05% to+4% specified active power of electromotor/
Value in the range of Miao；When steam turbine power given instruction instantaneous rate of change is less than zero, represent the given instruction of steam turbine power
Instantaneous rate of change negative direction is out-of-limit, and now steam turbine power given instruction instantaneous rate of change threshold value is at-0.05% to-4% electromotor
Value in the range of specified active power/second.
The shielding interference signal suppression anti-method adjusted of power the most according to claim 3, it is characterised in that:
In the Rule of judgment two of described step (2), when steam turbine power given instruction instantaneous rate of change is more than zero, now
Steam turbine power given instruction instantaneous rate of change threshold value was+2% electromotor specified active power/second；Refer to when steam turbine power is given
When making instantaneous rate of change be less than zero, now steam turbine power given instruction instantaneous rate of change threshold value is that-2% electromotor is specified meritorious
Power/second.
The shielding interference signal suppression anti-method adjusted of power the most according to claim 1, it is characterised in that:
In the Rule of judgment three of described step (2), when steam turbine power gives the absolute value no more than regulation of the variable quantity of instruction
The absolute value of variable quantity threshold value time, then it is assumed that the variable quantity of described steam turbine power in the variable quantity threshold range of regulation,
This Rule of judgment three is true；
When steam turbine power given instruction variable quantity is more than zero, steam turbine power given instruction variable quantity positive direction is out-of-limit, this
Time the set time be 1 second to 20 seconds, described variable quantity threshold value is in the range of+0.5% to+8% specified active power of electromotor
Value；
When steam turbine power given instruction variable quantity is less than zero, steam turbine power given instruction variable quantity negative direction is out-of-limit, this
Time the set time be 1 second to 20 seconds, described variable quantity threshold value is in the range of-0.5% to-8% specified active power of electromotor
Value.
The shielding interference signal suppression anti-method adjusted of power the most according to claim 5, it is characterised in that:
In the Rule of judgment three of described step (2), when steam turbine power given instruction variable quantity is more than zero, now set
Fixing time is 5 seconds, and described variable quantity threshold value is+4% specified active power of electromotor；
When steam turbine power given instruction variable quantity is less than zero, now the set time is 5 seconds, and described variable quantity threshold value is
-4% specified active power of electromotor.
The shielding interference signal suppression anti-method adjusted of power the most according to claim 1, it is characterised in that:
In the Rule of judgment four of described step (2), when described turbine speed instantaneous rate of change absolute value is more than the steamer of regulation
During the absolute value of machine rotating speed instantaneous rate of change threshold value, then it is assumed that turbine speed instantaneous rate of change has exceeded the steam turbine of regulation and turned
Speed instantaneous rate of change threshold range, this Rule of judgment four is true；
When turbine speed instantaneous rate of change is more than zero, turbine speed transient change positive direction is out-of-limit, and described steam turbine turns
Speed instantaneous rate of change threshold value value between+1 to+60 revs/min/point；
When turbine speed instantaneous rate of change is less than zero, turbine speed transient change negative direction is out-of-limit, and described steam turbine turns
Speed instantaneous rate of change threshold value value between-1 to-60 revs/min/point.
The shielding interference signal suppression anti-method adjusted of power the most according to claim 7, it is characterised in that:
In the Rule of judgment four of described step (2), when turbine speed instantaneous rate of change is more than zero, described turbine speed
Instantaneous rate of change threshold value value is+10 revs/min/points；When turbine speed instantaneous rate of change is less than zero, described steam turbine turns
Speed instantaneous rate of change threshold value value is-10 revs/min/points.
The shielding interference signal suppression anti-method adjusted of power the most according to claim 1, it is characterised in that:
Under output in described step (3) keeps instruction four Rule of judgment starts for true time in step (2) the most simultaneously
Reaching, output keeps the persistent period of instruction to perform according to the duration parameters preset, the duration parameters value model preset
Enclosing is 0.1 second to 1.0 seconds, and output keeps instruction to cancel after the persistent period terminates, and in default blocking time not
Again can assign output to load governor and keep instruction, the blocking time parameter value scope preset is 10 seconds to 300 seconds.
The shielding interference signal suppression anti-method adjusted of power the most according to claim 1, it is characterised in that:
In described step (3), make the load governor of governing system by constant 0 replaces load governor deviation input
Output keeps constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410427599.7A CN104158453B (en) | 2014-08-27 | 2014-08-27 | A kind of by the generator load sudden change start time shielding interference signal suppression anti-method adjusted of power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410427599.7A CN104158453B (en) | 2014-08-27 | 2014-08-27 | A kind of by the generator load sudden change start time shielding interference signal suppression anti-method adjusted of power |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104158453A CN104158453A (en) | 2014-11-19 |
| CN104158453B true CN104158453B (en) | 2016-09-28 |
Family
ID=51883887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410427599.7A Active CN104158453B (en) | 2014-08-27 | 2014-08-27 | A kind of by the generator load sudden change start time shielding interference signal suppression anti-method adjusted of power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104158453B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107404267B (en) * | 2017-07-19 | 2020-11-13 | 中国神华能源股份有限公司 | Generator load shedding identification method and system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2035939U (en) * | 1988-06-27 | 1989-04-12 | 山东工业大学 | Automatic microcomputer controller for generator load |
| JPH06197598A (en) * | 1992-12-25 | 1994-07-15 | Meidensha Corp | Power controller for generator |
| US6250877B1 (en) * | 2000-07-19 | 2001-06-26 | General Electric Co. | Steam turbine controller having method and apparatus for providing variable frequency regulation |
| FI126257B (en) * | 2009-08-12 | 2016-08-31 | Waertsilae Finland Oy | Electric power system protection arrangement |
| CN102619580B (en) * | 2011-01-31 | 2014-11-26 | 华北电力科学研究院有限责任公司 | Method and system for controlling one-time frequency modulation |
-
2014
- 2014-08-27 CN CN201410427599.7A patent/CN104158453B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104158453A (en) | 2014-11-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Zamani et al. | A novel hybrid islanding detection method using dynamic characteristics of synchronous generator and signal processing technique | |
| Alinezhad et al. | Out-of-step protection based on equal area criterion | |
| Bhui et al. | Estimation of inherent governor dead-band and regulation using unscented Kalman filter | |
| Pradhan et al. | A model-free approach for emergency damping control using wide area measurements | |
| CN109217371A (en) | Consider voltage converter grid-connected system method for analyzing stability, apparatus and system that phaselocked loop influences | |
| Zaker et al. | Small signal equivalent model of synchronous generator-based grid-connected microgrid using improved Heffron-Phillips model | |
| Kurukuru et al. | Cybersecurity in power electronics using minimal data–a physics-informed spline learning approach | |
| CN104158453B (en) | A kind of by the generator load sudden change start time shielding interference signal suppression anti-method adjusted of power | |
| Curzi et al. | In fault ride through reactive current rise time requirements of various European grid codes—analysis based on a full‐converter wind turbine | |
| CN106526519A (en) | Active power transmitter transient characteristic index evaluation method based on ADPSS simulation system | |
| Surjan | Linearized modeling of single machine infinite bus power system and controllers for small signal stability investigation and enhancement | |
| Ghafouri et al. | Analysis and mitigation of the communication delay impacts on wind farm central ssi damping controller | |
| Senyuk et al. | Adaptive algorithm for steam turbine fast valving based on the equal area criterion and synchrophasor measurements | |
| Nakmali et al. | A new hybrid approach to thevenin equivalent estimation for voltage stability monitoring | |
| Celeita et al. | Out-of-step protection modeling for virtual playback testing applied to industrial generators | |
| Guo et al. | Approximate dynamic programming based supplementary frequency control of thermal generators in power systems with large-scale renewable generation integration | |
| Lindenmeyer | A framework for power system restoration | |
| CN114583746A (en) | Universal modeling method for predicting lowest frequency point of new energy accessed to power grid | |
| Chowdhury et al. | PMU data based online parameter estimation of synchronous generator | |
| Elliott et al. | Stabilising transient disturbances with utility‐scale inverter‐based resources | |
| Mola et al. | Fast fault detection of synchronous generators | |
| Morioka et al. | Application of multivariable optimal controller to real power systems | |
| Horie et al. | Load frequency control using H infinity control in case of considering PV | |
| Khodadadi et al. | Robust power sharing control of an autonomous microgrid featuring secondary controller | |
| CN211320941U (en) | Microcomputer automatic quasi-synchronization device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |