CN110190611A - The primary frequency modulation bearing calibration and system of grid cyclic wave change rate based on PMU - Google Patents
The primary frequency modulation bearing calibration and system of grid cyclic wave change rate based on PMU Download PDFInfo
- Publication number
- CN110190611A CN110190611A CN201910483208.6A CN201910483208A CN110190611A CN 110190611 A CN110190611 A CN 110190611A CN 201910483208 A CN201910483208 A CN 201910483208A CN 110190611 A CN110190611 A CN 110190611A
- Authority
- CN
- China
- Prior art keywords
- large disturbances
- frequency
- synchronized
- change rate
- phasor
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/22—Flexible AC transmission systems [FACTS] or power factor or reactive power compensating or correcting units
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The present disclosure discloses the primary frequency modulation bearing calibration of the grid cyclic wave change rate based on PMU and systems, the Hzi based on PMU received is converted into the change rate of synchronizing frequency phasor by synchronized frequency phasor processing unit, whether the change rate for then carrying out synchronized frequency phasor is more than that grid cyclic wave large disturbances threshold determines, carry out whether synchronized frequency phasor is more than that grid cyclic wave large disturbances threshold determines again, to be determined whether mains frequency has occurred large disturbances in advance.If it is confirmed that large disturbances have occurred in mains frequency, primary frequency modulation correction system uses the control mode of " shortening the unit output dynamic stability time, increase compensation electricity " to large disturbances, meets the requirement that primary frequency regulation of power network is examined and evaluation system calculates large disturbances.The system and method may insure that the qualification rate of unit primary frequency modulation movement reaches 100%, and the illegal response times of unit primary frequency modulation realize zero, to improve the safe operation of power grid and unit.
Description
Technical field
This disclosure relates to primary frequency modulation technical field, more particularly to the primary tune of the grid cyclic wave change rate based on PMU
Frequency bearing calibration and system.
Background technique
The statement of this part is only to refer to background technique relevant to the disclosure, not necessarily constitutes the prior art.
In implementing the present disclosure, following technical problem exists in the prior art in inventor:
In recent years, the rapid development of fired power generating unit and generation of electricity by new energy, the operational management to power generation dispatching, especially once
More stringent requirements are proposed for frequency modulation.Such as provided in Shandong Province's management rule of electric wire netting dispatching detailed rules and regulations implementing method, monthly unit only
There is 1 primary frequency modulation movement unqualified, just by by the electricity of 2,000,000 KWh of examination, this means that the economic damage of hundreds of thousands member
It loses.Therefore the qualification rate that power plant requires unit primary frequency modulation to act now must be 100%.
Power grid acts unit primary frequency modulation the foundation of examination and evaluation: being generally based on synchronous phasor measuring device
(PMU) dynamic measuring data of high speed acquisition passes through on-line real time monitoring mains frequency (week in Wide Area Measurement System (WAMS)
Wave) identify the generation of disturbance, and large disturbances and microvariations are distinguished using more criterions, unit is then calculated using different methods
The characterisitic parameter of primary frequency modulation.Therefore, in order to which the qualification rate for guaranteeing that unit primary frequency modulation acts must be 100%, the one of unit
Secondary frequency modulation correction system should also have the Correction Strategies of difference to the large disturbances of mains frequency and microvariations.
Fired power generating unit primary frequency modulation correction system can not identify the generation that mains frequency (cycle) disturbs in advance at present
It is large disturbances or microvariations, thus can not be only coped with a kind of strategy using the Correction Strategies of difference.National grid is public
Taking charge of " Q/GDW669-2011 thermal power generation unit primary frequency modulation test guidance " 5.3.1 regulation, " unit participates in primary frequency modulation response
Lag time should be less than 3 seconds ".5.3.3 " the load responding speed of unit primary frequency modulation should meet: coal unit reaches regulation
The time of 75% target load is not more than 15 seconds, reaches the time of 90% target load no more than 30 seconds ".If unit will in this way
Primary frequency modulation act threshold according to " Q/GDW669-2011 " 5.2 regulation " unit participate in primary frequency modulation dead zone should ±
Within the scope of 0.033Hz or ± 2r/min " setting, then in mains frequency (cycle) mains frequency (cycle) large disturbances, unit
Primary frequency modulation response is just unable to satisfy above-mentioned regulation 5.3.1 and regulation 5.3.3 sometimes, and the qualification rate of primary frequency modulation movement just can not
Reach 100%.If by primary frequency modulation movement threshold be set lower than " Q/GDW669-2011 " regulation 5.2, such as: setting ±
1.6r/min (i.e. 0.0267Hz), allow unit primary frequency control system early response mains frequency (cycle) disturbance, reduce because
The primary frequency modulation delay time of the generations such as unit dead-band meets " Q/GDW669-2011 " 5.3.1, although this method improves
The qualification rate of unit primary frequency modulation movement, but due to mains frequency (cycle) microvariations frequent occurrence, therefore unit monthly increases
The illegal response times of the primary frequency modulation added are 1~3 times of normal response times, have seriously affected the safe operation and use of unit
Service life, and power grid is caused largely to disturb, influence the safe operation of power grid.
Chinese invention patent (application number: 201310306502.2, patent name: thermal power generation unit primary frequency modulation is online
Monitoring and Performance Assessment method), although which refers to " judge whether unit primary frequency modulation effective disturbance is that frequency is disturbed greatly
It is dynamic " method, still, which be the wire examination method for judging primary frequency modulation effect, with the disclosure for primary frequency modulation directly in response to
Control method, the two is essentially different.The patent judges whether primary frequency modulation is large disturbances, uses " unit mother
Line frequency frequency discontinuity value in 3 seconds mutation times is more than 0.05Hz, and the duration is more than 1 second " frequency (location variable)
The method being once judged as only occurs for the judgment value more than threshold.This method can not apply to primary frequency modulation directly in response to
In control method, because it needs to judge whether primary frequency modulation is large disturbances using 4 seconds, " Q/ is had been over
GDW669-2011 " 5.3.1 provide " unit participate in primary frequency modulation response lag time should be less than 3 seconds ".
To sum up, a technical problem that needs to be urgently solved by technical personnel in the field at present is: how accurate pre-
First identification mains frequency (cycle) disturbance is large disturbances or microvariations, and the primary frequency control system of unit takes difference respectively in turn
Response policy.
Summary of the invention
In order to solve the deficiencies in the prior art, present disclose provides the primary frequency modulations of the grid cyclic wave change rate based on PMU
Bearing calibration and system；Provide the accurate side for accurately identifying that mains frequency (cycle) disturbance is large disturbances or microvariations in advance
Method provides the unit primary frequency modulation adaptive control system of the large and small disturbance of responsive electricity grid frequency respectively, which can
To ensure that the qualification rate of unit primary frequency modulation movement reaches 100%, the illegal response times of unit primary frequency modulation realize zero, thus greatly
The safe operation of power grid and unit is improved greatly.
In a first aspect, present disclose provides the primary frequency modulation bearing calibrations of the grid cyclic wave change rate based on PMU.
The primary frequency modulation bearing calibration of grid cyclic wave change rate based on PMU, comprising:
Synchronized vector measurement device PMU is converted into synchronized based on PMU synchronized frequency vector for what is received
The change rate of frequency phasor；
Whether the change rate for carrying out synchronized frequency phasor is more than that grid cyclic wave large disturbances threshold determines；
Carry out whether synchronized frequency phasor is more than that grid cyclic wave large disturbances threshold determines,
It has been determined whether mains frequency has occurred large disturbances in advance；
If it is confirmed that large disturbances have occurred in mains frequency, large disturbances are responded.
Second aspect, the disclosure additionally provide the primary frequency modulation correction system of the grid cyclic wave change rate based on PMU.
The primary frequency modulation of grid cyclic wave change rate based on PMU corrects system, comprising:
Synchronized frequency abstraction module, being configured as synchronized vector measurement device PMU will receive based on PMU
Synchronized frequency vector is converted into the change rate of synchronized frequency phasor；
First determination module, whether the change rate for being configured for synchronized frequency phasor is more than that grid cyclic wave is big
Threshold is disturbed to determine；
Second determination module is configured for whether synchronized frequency phasor is more than grid cyclic wave large disturbances threshold
Determine, has been determined whether mains frequency has occurred large disturbances in advance；
Respond module is configured as responding large disturbances if it is confirmed that large disturbances have occurred in mains frequency.
Compared with prior art, the beneficial effect of the disclosure is:
1 provides the exact method for accurately identifying that mains frequency (cycle) disturbance is large disturbances or microvariations in advance, this
Sample be just provide the large and small disturbance of responsive electricity grid frequency respectively primary frequency modulation correction system be possibly realized.Because no matter from theory
It is upper to consider (power grid examination and evaluation system be using different calculation methods to big microvariations), or from actually consider (for
Early response as far as possible, to reduce the primary frequency modulation delay time because of generations such as unit dead-bands), it is necessary to power grid size
Disturbance uses different Correction Strategies.
2 correct in response mode of the system to large disturbances in primary frequency modulation, are more than particular door using mains frequency change rate
Sill and signalling first (the first decision condition of large disturbances), and lower than " Q/GDW669-2011 thermal power generation unit primary frequency modulation test
Directive/guide " threshold (that is: 2r/min or 0.033Hz) signalling second (the second decision condition of large disturbances) as defined in 5.2, the two signals
The case where existing simultaneously (above-mentioned 2 large disturbances decision conditions are set up) issues primary frequency modulation signal, responds primary frequency modulation, both protected
Primary frequency modulation correction system advancement has been demonstrate,proved, the primary frequency modulation delay time because of generations such as unit dead-bands has been reduced, meets " Q/
GDW669-2011 " 5.3.1, and a possibility that eliminate malfunction, so that the illegal response times of unit primary frequency modulation is realized zero.
3 correct in response mode of the system to large disturbances in primary frequency modulation, use " when shortening unit output dynamic stability
Between, increase compensation electricity " control mode, it is effectively reduced the fluctuation of steam turbine pitch, is reduced because unit dead-band etc. produces
Raw primary frequency modulation delay time meets " when unit participates in the lag of primary frequency modulation response of " Q/GDW669-2011 " 5.3.1
Between should be less than 3 seconds ", it is often more important that: because primary frequency modulation examination and evaluation system to large disturbances compensate electricity calculation method
It is based on difference coefficient relevant to the metastable power output of unit, so it is dynamic to shorten unit output using the control mode
State stablizes the time so that the electricity of primary frequency modulation response duration compensation is numerical value as big as possible, is met " Q/GDW669-2011 "
5.3.3 " the load responding speed of unit primary frequency modulation should meet: the time that coal unit reaches 75% target load is not more than
15 seconds, reach the time of 90% target load no more than 30 seconds ", ensure that the electricity compensated when the movement of unit primary frequency modulation
The requirement of primary frequency regulation of power network examination and evaluation system to large disturbances calculation method is fully met, so that unit primary frequency control system
Acting examination rate is 100%.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is the outline flowchart of one embodiment；
Fig. 2 is the detail flowchart of one embodiment；
Fig. 3 is the part details supplementary flow chart of Fig. 2 of one embodiment；
Fig. 4 is 300MW unit primary frequency modulation Dead zone example, wherein ± Pa is ± 0.033Hz, ± Pb is ± 0.025
~0.0316Hz, the corresponding -24MW of 0.2Hz in figure, the corresponding 24MW of -0.2Hz.
Specific embodiment
It is noted that described further below be all exemplary, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
In a first aspect, present embodiments providing the primary frequency modulation bearing calibration of the grid cyclic wave change rate based on PMU；
The primary frequency modulation bearing calibration of grid cyclic wave change rate based on PMU, comprising:
Synchronized vector measurement device PMU is converted into synchronized based on PMU synchronized frequency vector for what is received
The change rate of frequency phasor；
Whether the change rate for carrying out synchronized frequency phasor is more than that grid cyclic wave large disturbances threshold determines；
Carry out whether synchronized frequency phasor is more than that grid cyclic wave large disturbances threshold determines,
It has been determined whether mains frequency has occurred large disturbances in advance；
If it is confirmed that large disturbances have occurred in mains frequency, large disturbances are responded.
As shown in Figure 1, the primary frequency modulation bearing calibration of the grid cyclic wave change rate based on PMU, comprising:
S1: the synchronized frequency vector with time tag is extracted from synchronized vector measurement device PMU
Hzi-1And Hzi；Wherein, i indicated for the i-th moment；By synchronized frequency vector HziIt is sent into S2；
S2: digital electro-hydraulic control system DEH (Digital Electric Hydraulic Control
System) the synchronized frequency vector Hz that will be receivediWith the rotating rate signal R of the original steam turbine of unitiIt is poor make, then
Difference is compared with setting factor of safety, if it is less than factor of safety, then enters S3；If it is greater than factor of safety, then make
With the original primary frequency modulation control mode of DEH；Terminate；
S3: the synchronized frequency vector HZ that will be receivediWith synchronized frequency vector Hzi-1Within the unit time into
It is poor that row is made, and synchronizing frequency vector change rate is obtained, by the grid cyclic wave large disturbances threshold of synchronizing frequency vector change rate and setting
Changed factor be compared；
If synchronizing frequency vector change rate is greater than the changed factor of the grid cyclic wave large disturbances threshold of setting, then it represents that electricity
Net synchronizing frequency phasor meets the first decision condition of large disturbances and is then transferred to S4 to continue to determine whether to have occurred large disturbances；
If synchronizing frequency vector change rate is less than the changed factor of the grid cyclic wave large disturbances threshold of setting, continue to sentence
Determine whether synchronized frequency phasor occurs microvariations, in case of microvariations, then enters S6, if microvariations do not occur,
Return to S2；
S4: judge whether current electric grid synchronizing frequency phasor is more than primary frequency modulation large disturbances movement threshold, if it does, i.e.
The second decision condition of large disturbances is met, then output drive signal T1, into S5；If be less than, S2 is returned；
S5: shortening the unit output dynamic stability time, increases compensation electricity, to respond to large disturbances；
S6: microvariations are responded.
The disclosure uses mains frequency change rate (speed variables) to break through the continuous judgment method of threshold, judges the time
For 200ms and it is carried out continuously.
It is to be understood that the synchronized vector measurement device PMU is arranged to Subordinate communication mode.
As one or more embodiments, the detailed step of the S2 includes:
The synchronized frequency phasor Hz that will be receivediIt is compared with the rotating rate signal R i of the original steam turbine of unit:
︱ Hzi–Ri︱ < Δ R, (1)；
Wherein, Δ R is the synchronized frequency phasor Hz for confirming DEH system and receivingiIt is the factor of safety of authentic data, Ri
For the frequency of steam turbine, the frequency of steam turbine is equal to the revolving speed of steam turbine divided by 60；RiLower target meaning: i indicated for the i-th moment.
Such as: 0.1Hz (i.e. 6r/min) is set by Δ R；
If ︱ Hzi–Ri︱ < Δ R illustrates synchronized frequency phasor HziThe mistake of grid cyclic wave is received with unit original system
Difference within the allowable range, HziIt is authentic data, enters step S3.
If ︱ Hzi–Ri︱ > Δ R illustrates synchronized frequency phasor HziThe mistake of grid cyclic wave is received with unit original system
Difference has exceeded allowed band, HziData are problematic, restore the original primary frequency modulation control mode of DEH system, to guarantee unit
Safe operation.
As one or more embodiments, the specific steps of the S3 are as follows:
The change rate of synchronizing frequency phasor: ︱ Hzi–Hzi-1︱ > Δ Hzi, (2)
Wherein, Hz is synchronized frequency phasor, HziLower target meaning: i indicated for the i-th moment, when the i-th moment is with (i-1)-th
Carve difference 200ms, Δ HziFor the change rate factor for determining grid cyclic wave large disturbances threshold, Δ HziFor 0.02Hz.
The beneficial effect of S3 is: by the algebraical sum of increment size in the unit of account time, it is equivalent to differential effect, thus
Location variable is converted into speed variables, is equivalent to the calculating effect of change rate.
Setting 200ms is to be determined the unit time, for mains frequency, is equivalent to grid cyclic wave and completed for 10 week
An average speed difference (i.e. change rate judgement) is calculated after phase.
If (2) formula is set up, it is meant that after 1 second, thus shift value (i.e. mains frequency) is up to caused by speed difference
50.1Hz (or 49.9Hz), this difference 0.1Hz are 3 times that " Q/GDW669-2011 " 5.2 provides 0.033Hz.
If the change rate of synchronized frequency phasor is more than the change rate factor Hz of grid cyclic wave large disturbances threshold, say
Bright grid cyclic wave meets the first decision condition of large disturbances and is then transferred to S4 to continue to determine whether to have occurred large disturbances.
If the change rate of synchronized frequency phasor is not above the change rate factor Δ of grid cyclic wave large disturbances threshold
Hzi, then determine whether grid cyclic wave has occurred disturbance:
︱ Hzi- 50.0Hz (i.e. 3000r/min) ︱ > Pa (3)
Wherein, Pa is that primary frequency modulation disturbance acts threshold (i.e. primary frequency modulation disturbance dead zone), according to " Q/GDW669-2011 "
It is 2r/min or 0.033Hz that Pa, which should be arranged, in 5.2 regulations.
If (3) the formula condition of satisfaction, shows that synchronized frequency phasor disturbs, due to being unsatisfactory for (2) formula condition,
Therefore, it is considered that the disturbance is microvariations, it is transferred to S6.
If being unsatisfactory for (3) formula condition, show that synchronized frequency phasor there is no disturbance, goes back to S2.
As one or more embodiments, the specific steps of the S4 include:
Carry out whether synchronized frequency phasor at this time is more than that (that is: primary frequency modulation is big for primary frequency modulation large disturbances movement threshold
Disturb dead zone) Pb judgement (that is: the second decision condition of large disturbances):
︱ Hzi- 50.0Hz (i.e. 3000r/min) ︱ > Pb (4)
Wherein, Pb is that primary frequency modulation large disturbances act threshold (i.e. primary frequency modulation disturbance dead zone), is arranged according to field condition,
Generally at 1.5~1.9r/min (i.e. 0.025~0.0316Hz).
If meeting formula (4) condition, show that synchronized frequency phasor acts threshold also above primary frequency modulation large disturbances
(that is: primary frequency modulation large disturbances dead band value) Pb illustrates that two large disturbances decision conditions are set up, and grid cyclic wave has occurred greatly really
Disturbance, then output drive signal T1, is transferred to the control logic of primary frequency modulation correction system responsive electricity grid frequency large disturbances, that is, is transferred to
S5。
If being unsatisfactory for formula (4) condition, show that synchronized frequency phasor is not above primary frequency modulation large disturbances at this time
It acts threshold (i.e. primary frequency modulation large disturbances dead zone) Pb (that is: the second decision condition of large disturbances is unsatisfactory for), then goes back to S2.
As one or more embodiments, the specific steps of S5 include:
S51: after output drive signal T1 setting time, pumping signal T1 is changed to the primary frequency modulation disturbed response letter
Number T2, the definition of T2 signal are to meet formula: ︱ Hzi-50.0Hz) ︱ > Pa then issues T2 (see Fig. 2)；
S52: in the presence of pumping signal T1 or response signal T2, by synchronized frequency vector Δ HziApply
On providing primary frequency modulation Dead zone that 5.1 and 5.2 and 5.4 establish according to " Q/GDW669-2011 ", dead zone inflection point is set as ±
Pb (see Fig. 2)；It since the function is related with unit nameplate nominal power, can not enumerate, Fig. 4 is 300MW unit according to " Q/
GDW669-2011 " provide the 5.1 and 5.2 and 5.4 primary frequency modulation Dead zone examples established.
S53: calculating the maximum value of new value and retention value, keep maximum value constant in time range T, will most
Big value is applied directly to steam turbine pitch as increment instruction, generates compensation electricity；
S54: being more than maximum value of the new value in new time range T to be calculated, after continuation of insurance after setting time range T
It holds that new maximum value is constant in time range T, new maximum value is applied directly to steamer as increment instruction
Machine pitch generates compensation electricity；
S55: repeating step S53 and S54, until pumping signal T1 or response signal T2 disappears.
As one or more embodiments, by meeting formula (2) and meeting formula (4) and logic phase and form primary frequency modulation
After significant response signal T1, after 1 second, just it is changed to the primary frequency modulation significant response signal T1 to meet formula (3) and is formed
Primary frequency modulation significant response signal T2.This is because after large disturbances form the several seconds, synchronized frequency phasor change rate can be
Under the action of primary frequency modulation response, successive Regression is normal, and T1 signal can disappear, but the primary tune for meeting formula (3) and being formed
Frequency significant response signal T2 can be always maintained at effectively during disturbance.
In the effective situation of above-mentioned primary frequency modulation response signal (T1 or T2), Hzi is applied to according to " Q/GDW669-
2011 " on the primary frequency modulation Dead zone that regulation 5.1 and 5.2 and 5.4 is established, but its dead zone inflection point is set as ± Pb, is not " Q/
GDW669-2011 " provide 5.1 and 5.2 and 5.4 desired ± Pa (that is: 2r/min or 0.033Hz).At this moment if Hzi has fluctuation
Its function-output also has fluctuation,
As shown in Fig. 2, but within the time of 200ms, by " retention value module " and operation, " continual relatively data are big
Actual function-output remains that maximum value is invariable in 200ms after little module ", which refers to as increment
Order is applied directly to steam turbine pitch, generates compensation electricity." retention value module " and operation " continual relatively size of data mould
The function and working principle of block " refer to Fig. 3, there is the actual Logical Configuration of the two modules in Fig. 3.
In Fig. 3, the output of " MAX module " is connected to " MAX module " another 1 input by 1 channel of " switching switchs "
End, as feedback signal.For the signal of two input terminals after comparison, " MAX module " exports 1 maximum value.In 200ms
Time after, 2 channels of " switching switch " are connected to " MAX module " another 1 input terminal by " timing module ", that is, are disconnected
The feedback signal of " MAX module " output.Such 1 zero-signal is connected to " MAX module " former feedback input end, two input terminals
For signal after comparison, " MAX module " exports 1 new value.After 3ms, " timing module " switches back to 1 channel of " switching switch "
" MAX module " feedback input end, that is, be again coupled to the feedback signal of " MAX module " output, the signals of two input terminals pass through than
After relatively, " MAX module " exports 1 new maximum value within the time of new 200ms.The value is directly applied as increment instruction
It is added in steam turbine pitch, generates compensation electricity.Repeatedly, until being in primary frequency modulation significant response signal T1 or T2 disappearance
Only.
In response mode of the primary frequency modulation correction system to large disturbances, " shorten unit output dynamic stability using this
Time increases compensation electricity " control mode, it is effectively reduced the fluctuation of steam turbine pitch, is reduced because of unit dead-band etc.
The primary frequency modulation delay time of generation meets the " lag of unit participation primary frequency modulation response of " Q/GDW669-2011 " 5.3.1
Time should be less than 3 seconds ", it is often more important that: because primary frequency modulation examination and evaluation system compensate electricity calculating side to large disturbances
Method is based on difference coefficient relevant to the metastable power output of unit, so can shorten unit output using the control mode
The dynamic stability time so that the electricity of primary frequency modulation response duration compensation is numerical value as big as possible, meets " Q/GDW669-
2011 " 5.3.3 " the load responding speed of unit primary frequency modulation should meet: coal unit reaches the time of 75% target load
No more than 15 seconds, reach the time of 90% target load no more than 30 seconds ", compensation when ensuring that the movement of unit primary frequency modulation
Electricity fully meet primary frequency regulation of power network examination and requirement of the evaluation system to large disturbances calculation method so that unit is once adjusted
It is 100% that display system, which acts examination rate,.
As one or more embodiments, for the S6 to the response mode of microvariations, it is normal to be that present unit generally uses
Rule mode:
Hzi is applied to, the 5.1 and 5.2 and 5.4 primary frequency modulation Dead zones established are provided according to " Q/GDW669-2011 "
On (see Fig. 3), dead zone inflection point is set as ± Pa (that is: 2r/min or 0.033Hz).The output valve of the primary frequency modulation Dead zone is made
It is applied directly to steam turbine pitch for increment instruction, generates compensation electricity.Generally use in conventional manner such as primary frequency modulation
Machine inlet pressure compensation etc. function should also all have, and no longer describe.
Dead zone 1 in Fig. 3 is exactly that " Q/GDW669-2011 " provides that the primary frequency modulation of 5.1 and 5.2 and 5.4 foundation is dead
On area's function, dead zone inflection point is ± Pa (that is: 0.033Hz).
Dead zone 2 in Fig. 3 is exactly that " Q/GDW669-2011 " provides that the primary frequency modulation of 5.1 and 5.2 and 5.4 foundation is dead
On area's function, dead zone inflection point is ± Pb (that is: 0.025~0.0316Hz).
4 modules such as " MAX modules " in Fig. 3, " switching switch ", " zero " and " timing module " are exactly
In Fig. 2 and in verbal description " the retention value module " of S5 conductors inside and " continual relatively size of data module "
Actual Logical Configuration.
The power output Zhi ± ⊿ MWi of primary frequency modulation Dead zone in Fig. 3, is exactly the steam turbine pitch increment in Fig. 2
Instruction generates compensation electricity.
Second aspect present embodiments provides the primary frequency modulation correction system of the grid cyclic wave change rate based on PMU；
The primary frequency modulation of grid cyclic wave change rate based on PMU corrects system, comprising:
Synchronized frequency abstraction module, being configured as synchronized vector measurement device PMU will receive based on PMU
Synchronized frequency vector is converted into the change rate of synchronized frequency phasor；
First determination module, whether the change rate for being configured for synchronized frequency phasor is more than that grid cyclic wave is big
Threshold is disturbed to determine；
Second determination module is configured for whether synchronized frequency phasor is more than grid cyclic wave large disturbances threshold
Determine, has been determined whether mains frequency has occurred large disturbances in advance；
Respond module is configured as responding large disturbances if it is confirmed that large disturbances have occurred in mains frequency.
The primary frequency modulation of grid cyclic wave change rate based on PMU corrects system, comprising:
Synchronized frequency abstraction module, is configured as extracting from synchronized vector measurement device PMU and has
The synchronized frequency vector Hz of time tagi-1And Hzi；Wherein, i indicated for the i-th moment；By synchronized frequency vector HziIt send
Enter synchronized frequency vector comparison module；
Synchronized frequency vector comparison module is configured as digital electro-hydraulic control system DEH (Digital
Electric Hydraulic Control System) the synchronized frequency vector Hz that will receiveiWith the original steamer of unit
The rotating rate signal R of machineiCarry out make it is poor, then by difference with set factor of safety be compared, if it is less than factor of safety, then into
Enter synchronizing frequency vector change rate comparison module；If it is greater than factor of safety, then the original primary frequency modulation controlling party of DEH is used
Formula；Terminate；
Synchronizing frequency vector change rate comparison module is configured as the synchronized frequency vector HZ that will be receivediWith
Synchronized frequency vector Hzi-1Carried out within the unit time make it is poor, obtain synchronizing frequency vector change rate, by synchronizing frequency to
Quantitative change rate is compared with the changed factor of the grid cyclic wave large disturbances threshold of setting；
If synchronizing frequency vector change rate is greater than the changed factor of the grid cyclic wave large disturbances threshold of setting, then it represents that electricity
Net synchronizing frequency phasor meets the first decision condition of large disturbances, in order to continue to determine whether to have occurred large disturbances, is then transferred to big
Disturb determination module；
If synchronizing frequency vector change rate is less than the changed factor of the grid cyclic wave large disturbances threshold of setting, continue to sentence
Determine whether synchronized frequency phasor occurs microvariations, in case of microvariations, then enters microvariations respond module, if do not sent out
Raw microvariations, then return to synchronized frequency vector comparison module；
Large disturbances determination module is configured as judging whether current electric grid synchronizing frequency phasor is more than that primary frequency modulation is disturbed greatly
Movement threshold, if it does, meeting the second decision condition of large disturbances, then output drive signal T1, rings into large disturbances
Answer module；If be less than, synchronized frequency vector comparison module is returned；
Large disturbances respond module is configured as shortening the unit output dynamic stability time, increases compensation electricity, to big
Disturbance is responded；
Microvariations respond module is configured as responding microvariations.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (9)
1. the primary frequency modulation bearing calibration of the grid cyclic wave change rate based on PMU, characterized in that include:
Synchronized vector measurement device PMU is converted into synchronized frequency based on PMU synchronized frequency vector for what is received
The change rate of phasor；
Whether the change rate for carrying out synchronized frequency phasor is more than that grid cyclic wave large disturbances threshold determines；
Carry out whether synchronized frequency phasor is more than that grid cyclic wave large disturbances threshold determines,
It has been determined whether mains frequency has occurred large disturbances in advance；
If it is confirmed that large disturbances have occurred in mains frequency, large disturbances are responded.
2. the method as described in claim 1, characterized in that include:
S1: the synchronized frequency vector Hz with time tag is extracted from synchronized vector measurement device PMUi-1With
Hzi；Wherein, i indicated for the i-th moment；By synchronized frequency vector HziIt is sent into S2；
S2: the digital electro-hydraulic control system DEH synchronized frequency vector Hz that will be receivediWith the original steam turbine of unit
Rotating rate signal RiIt is poor make, and is then compared difference with setting factor of safety, if it is less than factor of safety, then enters
S3；If it is greater than factor of safety, then the original primary frequency modulation control mode of DEH is used；Terminate；
S3: the synchronized frequency vector HZ that will be receivediWith synchronized frequency vector Hzi-1Made within the unit time
Difference obtains synchronizing frequency vector change rate, by the change of synchronizing frequency vector change rate and the grid cyclic wave large disturbances threshold of setting
Change the factor to be compared；
If synchronizing frequency vector change rate is greater than the changed factor of the grid cyclic wave large disturbances threshold of setting, then it represents that power grid is same
Synchronizing frequency phasor meets the first decision condition of large disturbances and is then transferred to S4 to continue to determine whether to have occurred large disturbances；
If synchronizing frequency vector change rate is less than the changed factor of the grid cyclic wave large disturbances threshold of setting, continue to determine electricity
Whether net synchronizing frequency phasor occurs microvariations, in case of microvariations, then enters S6 and returns if microvariations do not occur
S2；
S4: judge whether current electric grid synchronizing frequency phasor is more than primary frequency modulation large disturbances movement threshold, if it does, meeting
Large disturbances the second decision conditions, then output drive signal T1, into S5；If be less than, S2 is returned；
S5: shortening the unit output dynamic stability time, increases compensation electricity, to respond to large disturbances；
S6: microvariations are responded.
3. method according to claim 2, characterized in that the detailed step of the S2 includes:
The synchronized frequency phasor Hz that will be receivediIt is compared with the rotating rate signal R i of the original steam turbine of unit:
︱ Hzi–Ri︱ < Δ R, (1)；
Wherein, Δ R is the synchronized frequency phasor Hz for confirming DEH system and receivingiIt is the factor of safety of authentic data, RiFor vapour
The frequency of turbine, the frequency of steam turbine are equal to the revolving speed of steam turbine divided by 60；RiLower target meaning: i indicated for the i-th moment；
If ︱ Hzi–Ri︱ < Δ R illustrates synchronized frequency phasor HziThe error for receiving grid cyclic wave with unit original system exists
In allowed band, HziIt is authentic data, enters step S3；
If ︱ Hzi–Ri︱ > Δ R illustrates synchronized frequency phasor HziThe error for receiving grid cyclic wave with unit original system is super
Allowed band, Hz are gone outiData are problematic, restore the original primary frequency modulation control mode of DEH system, to guarantee the peace of unit
Row for the national games.
4. the method as described in claim 1, characterized in that the specific steps of the S3 are as follows:
The change rate of synchronizing frequency phasor: ︱ Hzi–Hzi-1︱ > Δ Hzi,(2)
Wherein, Hz is synchronized frequency phasor, HziLower target meaning: i indicates the i-th moment, the i-th moment and the (i-1)-th moment phase
Poor 200ms, Δ HziFor the change rate factor for determining grid cyclic wave large disturbances threshold, Δ HziFor 0.02Hz；
If the change rate of synchronized frequency phasor is more than the change rate factor Hz of grid cyclic wave large disturbances threshold, illustrate electricity
Net week wave meets the first decision condition of large disturbances and is then transferred to S4 to continue to determine whether to have occurred large disturbances；
If the change rate of synchronized frequency phasor is not above the change rate factor Δ Hz of grid cyclic wave large disturbances thresholdi, then
Determine whether grid cyclic wave has occurred disturbance.
5. method as claimed in claim 4, characterized in that
If the change rate of synchronized frequency phasor is not above the change rate factor Δ Hz of grid cyclic wave large disturbances thresholdi, then
Determine whether grid cyclic wave has occurred disturbance
︱ Hzi- 50.0Hz ︱ > Pa (3)
Wherein, Pa is that primary frequency modulation disturbance acts threshold, and it is 2r/ that Pa, which should be arranged, according to the regulation of " Q/GDW669-2011 " 5.2
Min or 0.033Hz；
If (3) the formula condition of satisfaction, shows that synchronized frequency phasor disturbs, due to being unsatisfactory for (2) formula condition,
Think that the disturbance is microvariations, is transferred to S6；
If being unsatisfactory for (3) formula condition, show that synchronized frequency phasor there is no disturbance, goes back to S2.
6. method according to claim 2, characterized in that the specific steps of the S4 include:
Carry out at this time synchronized frequency phasor whether be more than primary frequency modulation large disturbances movement threshold Pb judgement:
︱ Hzi- 50.0Hz ︱ > Pb (4)
Wherein, Pb is that primary frequency modulation large disturbances act threshold, and setting Pb is i.e.: 0.025~0.0316Hz.
If meeting formula (4) condition, show that synchronized frequency phasor acts threshold Pb, explanation also above primary frequency modulation large disturbances
Two large disturbances decision conditions are set up, and large disturbances have occurred in grid cyclic wave really, then output drive signal T1, are transferred to primary tune
Frequency corrects the control logic of system responsive electricity grid frequency large disturbances, that is, is transferred to S5；
If being unsatisfactory for formula (4) condition, show that synchronized frequency phasor is not above the movement of primary frequency modulation large disturbances at this time
Threshold Pb, then go back to S2.
7. method according to claim 2, characterized in that the specific steps of S5 include:
S51: after output drive signal T1 setting time, pumping signal T1 is changed to the primary frequency modulation response signal disturbed
The definition of T2, T2 signal is to meet formula: ︱ Hzi-50.0Hz) ︱ > Pa then issues T2；
S52: in the presence of pumping signal T1 or response signal T2, by synchronized frequency vector Δ HziIt is applied to basis
" Q/GDW669-2011 " provides on the primary frequency modulation Dead zone that 5.1 and 5.2 and 5.4 establish that dead zone inflection point is set as ± Pb；
S53: the maximum value of new value and retention value is calculated, keeps maximum value constant in time range T, by maximum value
It is applied directly to steam turbine pitch as increment instruction, generates compensation electricity；
S54: being more than to calculate maximum value of the new value in new time range T after setting time range T, continue to keep new
Maximum value it is constant in time range T, be applied directly to steam turbine tune for new maximum value as increment instruction
Door generates compensation electricity；
S55: repeating step S53 and S54, until pumping signal T1 or response signal T2 disappears.
8. the primary frequency modulation of the grid cyclic wave change rate based on PMU corrects system, characterized in that
Synchronized frequency abstraction module, being configured as synchronized vector measurement device PMU will receive based on PMU power grid
Synchronizing frequency vector is converted into the change rate of synchronized frequency phasor；
First determination module, whether the change rate for being configured for synchronized frequency phasor is more than grid cyclic wave large disturbances
Threshold determines；
Second determination module is configured for whether synchronized frequency phasor is more than that grid cyclic wave large disturbances threshold is sentenced
It is fixed, it has been determined whether mains frequency has occurred large disturbances in advance；
Respond module is configured as responding large disturbances if it is confirmed that large disturbances have occurred in mains frequency.
9. system as claimed in claim 8, characterized in that include:
Synchronized frequency abstraction module is configured as extracting band having time from synchronized vector measurement device PMU
The synchronized frequency vector Hz of labeli-1And Hzi；Wherein, i indicated for the i-th moment；By synchronized frequency vector HziIt is sent into electricity
Net synchronizing frequency vector comparison module；
Synchronized frequency vector comparison module is configured as the power grid that digital electro-hydraulic control system DEH will be received
Synchronizing frequency vector HziWith the rotating rate signal R of the original steam turbine of unitiIt is poor make, then by difference and setting factor of safety
It is compared, if it is less than factor of safety, then enters synchronizing frequency vector change rate comparison module；If it is greater than factor of safety,
Then use the original primary frequency modulation control mode of DEH；Terminate；
Synchronizing frequency vector change rate comparison module is configured as the synchronized frequency vector HZ that will be receivediIt is same with power grid
Synchronizing frequency vector Hzi-1It is poor to carry out making within the unit time, obtains synchronizing frequency vector change rate, synchronizing frequency vector is changed
Rate is compared with the changed factor of the grid cyclic wave large disturbances threshold of setting；
If synchronizing frequency vector change rate is greater than the changed factor of the grid cyclic wave large disturbances threshold of setting, then it represents that power grid is same
Synchronizing frequency phasor meets the first decision condition of large disturbances and is then transferred to large disturbances to continue to determine whether to have occurred large disturbances
Determination module；
If synchronizing frequency vector change rate is less than the changed factor of the grid cyclic wave large disturbances threshold of setting, continue to determine electricity
Whether net synchronizing frequency phasor occurs microvariations, in case of microvariations, then enters microvariations respond module, if do not occurred small
Disturbance, then return to synchronized frequency vector comparison module；
Large disturbances determination module is configured as judging whether current electric grid synchronizing frequency phasor is more than that primary frequency modulation large disturbances are dynamic
Make threshold, if it does, meeting the second decision condition of large disturbances, then output drive signal T1, responds mould into large disturbances
Block；If be less than, synchronized frequency vector comparison module is returned；
Large disturbances respond module is configured as shortening the unit output dynamic stability time, increases compensation electricity, to large disturbances
It is responded；
Microvariations respond module is configured as responding microvariations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910483208.6A CN110190611B (en) | 2019-06-04 | 2019-06-04 | PMU-based primary frequency modulation correction method and system for power grid cycle change rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910483208.6A CN110190611B (en) | 2019-06-04 | 2019-06-04 | PMU-based primary frequency modulation correction method and system for power grid cycle change rate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110190611A true CN110190611A (en) | 2019-08-30 |
| CN110190611B CN110190611B (en) | 2020-11-06 |
Family
ID=67720351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910483208.6A Expired - Fee Related CN110190611B (en) | 2019-06-04 | 2019-06-04 | PMU-based primary frequency modulation correction method and system for power grid cycle change rate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110190611B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111244973A (en) * | 2020-02-13 | 2020-06-05 | 中国电力科学研究院有限公司 | Control method and system for distinguishing small disturbance and large disturbance for primary frequency modulation of new energy |
| CN111293708A (en) * | 2020-02-13 | 2020-06-16 | 中国电力科学研究院有限公司 | Hydroelectric generating set primary frequency modulation control method and system capable of distinguishing small disturbance and large disturbance |
| CN111342479A (en) * | 2020-03-04 | 2020-06-26 | 中国电力科学研究院有限公司 | Control method and system for distinguishing small disturbance and large disturbance for primary frequency modulation of gas turbine set |
| CN111551820A (en) * | 2020-04-21 | 2020-08-18 | 天津大学 | System identification method for rapid frequency adjustment of power distribution network based on synchronous phasor measurement |
| CN111594384A (en) * | 2020-07-22 | 2020-08-28 | 中国电力科学研究院有限公司 | Control method and master control system for voltage source type wind turbine generator system |
| CN112881795A (en) * | 2021-01-07 | 2021-06-01 | 国网河南省电力公司电力科学研究院 | Wavelet analysis-based power grid frequency large disturbance rapid discrimination method and system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101299052A (en) * | 2007-11-08 | 2008-11-05 | 国网南京自动化研究院 | Electric generator one time frequency modulation real time quantitative analysis method based on phasor measuring technique |
| CN103138401A (en) * | 2013-03-01 | 2013-06-05 | 河南省电力公司电力科学研究院 | Device and method for carrying out primary frequency modulation on generator unit by applying of power management unit (PMU) frequency information |
| CN103346619A (en) * | 2013-07-19 | 2013-10-09 | 国家电网公司 | Online monitoring and performance assessing method for primary frequency modulation of thermal generator set |
| US20140145452A1 (en) * | 2012-04-20 | 2014-05-29 | North China Electric Power Research Institute Co. Ltd. | Method and device for primary frequency regulation based on bang-bang control |
| CN106549422A (en) * | 2016-12-07 | 2017-03-29 | 中国南方电网有限责任公司 | A kind of AGC emergency control methods and system based on frequency change rate |
| CN109636247A (en) * | 2019-01-14 | 2019-04-16 | 国电南瑞科技股份有限公司 | A kind of fired power generating unit primary frequency modulation performance performance assessment criteria calculation method and its system |
-
2019
- 2019-06-04 CN CN201910483208.6A patent/CN110190611B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101299052A (en) * | 2007-11-08 | 2008-11-05 | 国网南京自动化研究院 | Electric generator one time frequency modulation real time quantitative analysis method based on phasor measuring technique |
| US20140145452A1 (en) * | 2012-04-20 | 2014-05-29 | North China Electric Power Research Institute Co. Ltd. | Method and device for primary frequency regulation based on bang-bang control |
| CN103138401A (en) * | 2013-03-01 | 2013-06-05 | 河南省电力公司电力科学研究院 | Device and method for carrying out primary frequency modulation on generator unit by applying of power management unit (PMU) frequency information |
| CN103346619A (en) * | 2013-07-19 | 2013-10-09 | 国家电网公司 | Online monitoring and performance assessing method for primary frequency modulation of thermal generator set |
| CN106549422A (en) * | 2016-12-07 | 2017-03-29 | 中国南方电网有限责任公司 | A kind of AGC emergency control methods and system based on frequency change rate |
| CN109636247A (en) * | 2019-01-14 | 2019-04-16 | 国电南瑞科技股份有限公司 | A kind of fired power generating unit primary frequency modulation performance performance assessment criteria calculation method and its system |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111244973A (en) * | 2020-02-13 | 2020-06-05 | 中国电力科学研究院有限公司 | Control method and system for distinguishing small disturbance and large disturbance for primary frequency modulation of new energy |
| CN111293708A (en) * | 2020-02-13 | 2020-06-16 | 中国电力科学研究院有限公司 | Hydroelectric generating set primary frequency modulation control method and system capable of distinguishing small disturbance and large disturbance |
| CN111342479A (en) * | 2020-03-04 | 2020-06-26 | 中国电力科学研究院有限公司 | Control method and system for distinguishing small disturbance and large disturbance for primary frequency modulation of gas turbine set |
| CN111551820A (en) * | 2020-04-21 | 2020-08-18 | 天津大学 | System identification method for rapid frequency adjustment of power distribution network based on synchronous phasor measurement |
| CN111551820B (en) * | 2020-04-21 | 2022-03-08 | 天津大学 | System identification method for rapid frequency adjustment of power distribution network based on synchronous phasor measurement |
| CN111594384A (en) * | 2020-07-22 | 2020-08-28 | 中国电力科学研究院有限公司 | Control method and master control system for voltage source type wind turbine generator system |
| CN111594384B (en) * | 2020-07-22 | 2020-11-24 | 中国电力科学研究院有限公司 | Control method and master control system for voltage source type wind turbine generator system |
| CN112881795A (en) * | 2021-01-07 | 2021-06-01 | 国网河南省电力公司电力科学研究院 | Wavelet analysis-based power grid frequency large disturbance rapid discrimination method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110190611B (en) | 2020-11-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110190611A (en) | The primary frequency modulation bearing calibration and system of grid cyclic wave change rate based on PMU | |
| CN101555806B (en) | Classification alarm and identification auxiliary method of real-time production parameters of power plant | |
| TWI676332B (en) | Wind energy system and method for controlling wind turbine | |
| Khoshkhoo et al. | On-line dynamic voltage instability prediction based on decision tree supported by a wide-area measurement system | |
| CN105445582A (en) | Interconnection power grid primary frequency modulation responding performance assessment method | |
| CN103414182B (en) | Smooth switching method for converting parallel operation of flexible direct current transmission system into island operation | |
| CN108335021A (en) | A kind of method and maintenance decision optimization of wind energy conversion system state Reliability assessment | |
| CN112886638B (en) | Online generator inertia identification method and system | |
| CN110021942B (en) | DCS-based frequency modulation control method | |
| CN107203816A (en) | A kind of trouble hunting method and system of secondary equipment in power system | |
| CN107341559A (en) | A kind of Primary frequency control ability Forecasting Methodology based on main vapour pressure tolerance | |
| CN103378784B (en) | Load command dynamic compensation method and system | |
| CN105934862A (en) | Wind farm control having improved target-value jump behavior | |
| CN112240267B (en) | Fan monitoring method based on wind speed correlation and wind power curve | |
| CN106845757B (en) | Power grid power flow transfer hazard degree evaluation method | |
| Glavic et al. | E-SIME-A method for transient stability closed-loop emergency control: achievements and prospects | |
| CN106526519A (en) | Active power transmitter transient characteristic index evaluation method based on ADPSS simulation system | |
| CN109004673A (en) | A kind of subway Way of Regenerating Energy Feedback device DC voltage detection and control method | |
| CN105514843B (en) | A kind of 750kV substation secondary device repair methods based on Monitoring Data | |
| CN108345295A (en) | A kind of analog quantity multi-measuring point logical algorithm | |
| CN117882261A (en) | Predicting grid frequency | |
| Zhao et al. | Application of SOM neural network in fault diagnosis of wind turbine | |
| CN108539800A (en) | AGC closed loop test method and device | |
| CN105139075A (en) | Electric power system safety stabilization prevention control rolling decision method in consideration of real-time plan | |
| Liu et al. | Risk assessment of a generator rejection scheme implemented in a wind farm |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201106 Termination date: 20210604 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |