CN110417064A - Regulations speed dynamic regulation method and device based on the active ability monitoring of AGC unit - Google Patents
Regulations speed dynamic regulation method and device based on the active ability monitoring of AGC unit Download PDFInfo
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- CN110417064A CN110417064A CN201910684908.1A CN201910684908A CN110417064A CN 110417064 A CN110417064 A CN 110417064A CN 201910684908 A CN201910684908 A CN 201910684908A CN 110417064 A CN110417064 A CN 110417064A
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- 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
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- 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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/48—Controlling the sharing of the in-phase component
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Abstract
The present invention proposes a kind of regulations speed dynamic regulation method and device based on the active ability monitoring of AGC unit, and according to the real-time steam extraction value of collected unit, its caused power of the assembling unit drop-out value is sought in calculating；Performance number is fired according to power of the assembling unit drop-out value and collected unit power-handling capability, the minimum steady obtained, obtains the adjustable interval range of the power of the assembling unit；Judge that unit realtime power value is in the position in the adjustable section of unit, if exceeding adjustable section, triggers grid side agc mode operating unit regulations speed regulator control system and control is adjusted.The present invention carries out dynamic adaptation to the power regulation rate of AGC operating unit according to the variation of the active regulating power of AGC operating unit in regional power grid, give full play to AGC operating unit power regulation ability, avoid intervention of the power grid operation personnel to AGC operating unit quantity, meet electric power under market price bidding mode normally orderly to supply, the frequency fluctuation for reducing network system realizes net source coordination development.
Description
Technical field
The present invention relates to net source coordination control technology fields more particularly to a kind of based on the active ability monitoring of AGC unit
Regulations speed dynamic regulation method and system.
Background technique
Extra-high voltage grid and interconnection power system under the new situation, grid contacts at different levels are increasingly close, power grid and unit
Between cooperation requirement it is also higher and higher.Meanwhile the installation of China's new energy and generated energy fast lifting, new energy are installed
(wind-powered electricity generation, photovoltaic, nuclear power) accounting will be promoted to 18.5% or more in by the end of September, 2017 less than 16% from the end of the year in 2016.By the end of
In September, 2017, new energy total installation of generating capacity reach 275GW, and newly-increased thermoelectricity installed capacity accounting only has 33%, far below in storage
In accounting 64%, new energy installation accounting reaches 58%, wherein only the newly-increased installation of photovoltaic just accounts for 45%.Meanwhile it is interregional
What is interconnected is increasingly close, and electric system will face the wide fluctuations of interregional a large amount of electric power transfer and trend.For power grid
Safe and stable operation, as the main force of current power grid frequency modulation peak regulation, Large-scale fire-electricity unit requires investment Automatic Generation Control
(AGC) function.Large-scale fire-electricity unit is run often in wide load setting, range generally in 50%~100% rated load, and
And unit is required to have quick, accurate, stable response load variations demand.
Power grid AGC performance is called in each AGC data collection cycle, for assessing the controlling behavior of AGC, evaluation criteria
Predominantly NERC (National Electrical Research Council, North America Power System Reliability association) behavior is quasi-
Then.Power grid AGC performance can calculate and count operation area performance indicator, unit performance index, can also calculate frequency, exchange
The qualification rate under different threshold values and different condition (whether such as AGC puts into) such as power, ACE (district control deviation).
Fig. 1 shows net source AGC collaboration allotment control schematic diagram, wherein calculating ACE according to mains frequency and interconnection trend, ACE is produced
After life, common action on each AGC unit is assigned to according to certain mechanism and reaches the stabilization of mains frequency to eliminate deviation.
NERC just formally evaluated the control performance of power grid under normal circumstances using A1, A2 standard early in 1973, in
Rong Shi: A1: the ACE of control area in 10min must at least zero passage it is primary；A2: the ACE of control area is flat in 10min
Mean value must be controlled in defined range LdIt is interior.The control qualification rate that NERC requires each control area to reach A1, A2 standard exists
90% or more.In this way by executing A1, A2 standard, make the ACE of each control area always close to zero, to guarantee power load
The balance between actual exchange is exchanged with power generation, plan.NERC was proposed the evaluation of CPS1, CPS2 control performance in 1996
Standard started formal implementation in 1998, instead of original A1, A2 standard.It is similar to A1, A2 standard, it is desirable that ACE is every
The average value of 10min must be controlled in defined range L10It is interior.Currently, the country's AGC control performance evaluation mainly using
Two sets of standards that NERC carries out: A1, A2 standard and CPS1, CPS2 standard, such as North China regional power grid are marked using A1, A2
Standard, the regional power grids such as East China are using CPS1, CPS2 standard.
Active power regulation rate A1 value in Fig. 2 is generally set to 1%-2%Pe (Pe is unit rated power) MW/min,
Unit carries out the growth or decline of active power at the same rate.But found through live actual tests, unit equipment without reason
When barrier, power regulation rate can generally exceed defined a reference value, and regulations speed maximum value is up to 2.5%-4%PeMW/
min。
In power grid actual motion, since current frequency modulation assisted hatching price is by concentrating competitive way to carry out, symbol
Close frequency modulation marketing entry criteria generating set energy market a few days ago declare link need to synchronize declare frequency modulation quotation.Day
Interior Unit Combination adjustment is selectively organized according to the actual situation, if operation of power networks boundary condition changes, and may shadow
Normally orderly supply and the clean energy resource consumption of power network safety operation, electric power is rung, it can be according to the newest perimeter strip of operation of power networks
Part, the ahead market quotation based on generating set are carried out excellent using security constraint Unit Combination, security constrained economic dispatch algorithm
Change and calculate, forms in a few days generation schedule (unit commitment containing unit and unit output plan) clearly out.That is, to regional power grid
For, the unit rate and number of units that daily investment AGC mode is run are fixed, i.e., the daily active power variations of entire power grid
Rate be it is fixed, it is insufficient or more that this easily causes unit unit overall power in a few days certain period to adjust changing capability
It is remaining, it cannot be guaranteed that average value control of the Grid control deviation within certain time is within the limits prescribed, if ACE is excessive
It needs to cut off a large amount of operating units in sending end power grid, receiving end power grid cuts off a certain amount of load, chain reaction otherwise will occur, lead
Cause system unstability.
Summary of the invention
To solve the above-mentioned problems, the invention proposes a kind of regulations speed based on the active ability monitoring of AGC unit is dynamic
State regulates and controls method and device, can be according to the variation of the active regulating power of AGC operating unit, and dynamic adjusts the function of AGC operating unit
Rate regulations speed, it is ensured that the stable operation of power grid.
Specifically, a kind of regulations speed dynamic regulation method based on the active ability monitoring of AGC unit of the invention, including
Following steps:
S1: according to the real-time steam extraction value of collected unit, its caused power of the assembling unit drop-out value is sought in calculating；
S2: performance number, meter are fired according to power of the assembling unit drop-out value and collected unit power-handling capability, the minimum steady obtained
The power ceiling value and power lower limit value for seeking every unit are calculated, i.e. the acquisition adjustable interval range of the power of the assembling unit；
S3: judging that unit realtime power value is in the position in the adjustable section of unit, if exceeding adjustable section, triggers power grid
Control is adjusted in side agc mode operating unit regulations speed regulator control system.
Further, in step S1, power of the assembling unit drop-out value caused by the real-time steam extraction value of unit is pressed according to machine set type
30-40T/h corresponds to 10MW power and is calculated.
Further, in step S2, the power of the assembling unit is adjustable, and interval range calculation method is, power adjustable lower limit=minimum steady
Fire power of the assembling unit drop-out value caused by performance number+steam extraction, unit function caused by the power adjustable upper limit=unit rated power-steam extraction
Rate drop-out value.
Further,
In the step S2, minimum steady fires 50% that performance number is lower than unit rated power, and specific value is according to unit depth
Test situation determines after spending peak regulation transformation.
Further, minimum steady combustion performance number range takes the 30%-50% of unit rated power.
Further, in step S3, grid side agc mode operating unit regulations speed distributes Controlling principle automatically are as follows: root
According to the corresponding regulations speed of out-of-limit unit, from the unit run in power adjustable interval range, by index after the weighting of AGC unit
It chooses from high to low.
Further, the calculation formula of index after the AGC unit weights are as follows:
Si=(1-Qi%) (α Ni+βRiP),
Wherein SiFor index after unit weighting, Qi% is power of the assembling unit accounting value, NiRefer to for monthly AGC unit comprehensive performance
Mark, RiPSurplus can be promoted for power of the assembling unit regulations speed, α, β are weighting coefficient.
Further, the principle of performance is preferentially taken into account according to rate, factor alpha, β are set to 0.4 and 0.6.
Further, the power of the assembling unit regulations speed can promote surplus RiPBy power of the assembling unit regulations speed ceiling value and machine
Group power regulation rate setpoints, which subtract each other, to be acquired, i.e. RiP=RiH-Ri, RiHFor power of the assembling unit regulations speed ceiling value, RiFor unit
Power regulation rate setpoints.
Further, the power of the assembling unit regulations speed setting value RiCalculating be divided into two kinds of situations:
When carrying out the promotion of power regulation rate without unit, former power regulation rate setpoints R is keptiO, i.e. Ri=RiO；
When needing unit to carry out the promotion of power regulation rate, by unit original power regulation rate setpoints RiOIt is selected with through judgement
Power of the assembling unit regulations speed after selecting need to promote amplitude RiUAddition acquires, i.e. Ri=RiO+RiU。
Further, the unit original power regulation rate setpoints RiOTake the 1%-2% of unit rated active power.
Further, the unit regulations speed ceiling value is tested by AGC and determines amplitude size.
Further, the unit regulations speed ceiling value is the 2.5%-4% of unit rated active power.
Further, in the step S3, compensation unit number of units selection includes:
By in the corresponding regulations speed mean allocation of out-of-limit unit to compensation unit, compensation unit number of units selection principle is such as
Under:
Wherein R is the corresponding regulations speed value of out-of-limit unit.
The present invention also proposes a kind of regulations speed dynamic regulation device based on the active ability monitoring of AGC unit, feature
It is, comprising: function module F (x), analog quantity selector AXSEL, adder Module ADD1, adder Module ADD2, subtraction
Device module DEV1, subtracter block DEV2, divider module DIV, high lower bound alarm module HLALM, high lower bound clipping module
HLLMT；
The real-time steam extraction value of unit that every is run under the AGC mode, which is sent, to be sought it to function module F (x) calculating and causes
Power of the assembling unit drop-out value, the value send all the way to subtracter block DEV1 the second input terminal and collected unit rated power
Value, which asks difference to obtain actual unit highest, can send out performance number, send all the way to the first input end of adder Module ADD1 with collect
Unit minimum steady combustion performance number sum to obtain that actual unit is minimum to send out performance number；
Collected unit realtime power value is sent all the way to the first input end of divider module DIV and subtracter block
The output of DEV1 finds out power of the assembling unit accounting value, send the analog input end of supreme lower bound alarm module HLALM all the way；High lower bound
The high and low limit value input terminal of alarm module HLALM is respectively connected to the output of subtracter block DEV1 and adder Module ADD1,
To monitor the whether higher limit of unit realtime power value or more lower bound；
Power of the assembling unit monitoring is with regulations speed regulator control system according to the shape of all units run under the agc mode monitored
State information judges that choosing suitable unit sending power of the assembling unit regulations speed needs promotion signal setting to analog quantity selector AXSEL
Position end, and the power of the assembling unit regulations speed need to be promoted into amplitude and given to the first input end of analog quantity selector AXSEL, analog quantity
The output of selector AXSEL is sent to the first input end of adder Module ADD2；
Unit original power regulation rate setpoints are sent to the second input terminal of adder Module ADD2 and power of the assembling unit tune
Section rate need to promote amplitude summation, and the power of the assembling unit regulations speed setting value acquired is sent all the way to subtracter block DEV2's
Second input terminal send the analog input end of supreme lower bound clipping module HLLMT all the way；The first of subtracter block DEV2 is defeated
Enter end and receive collected unit regulations speed ceiling value, calculating, which acquires power of the assembling unit regulations speed, can promote surplus；
The high and low limit value input terminal of high lower bound clipping module HLLMT is respectively connected to collected unit regulations speed high limit
Value and lower limit value.
Further, the unit regulations speed ceiling value is tested by AGC determines that amplitude size unit regulations speed is low
Limit value is selected according to the difference of machine set type.
Further, the unit regulations speed ceiling value is the 2.5%-4% of unit rated active power, and unit is adjusted
Rate lower limit value takes the 1%-2% of unit rated active power.
Further,
The unit original power regulation rate setpoints take the 1%-2% of unit rated active power.
Compared with prior art, the beneficial effects of the present invention are:
(1) function of the variation of the invention according to the active regulating power of AGC operating unit in regional power grid to AGC operating unit
Rate regulations speed carries out dynamic adaptation, it is ensured that Grid control deviation average value at the appointed time and zero passage etc. refer to
Mark, reduces the frequency fluctuation of network system.
(2) present invention passes through the power regulation rate of dynamic adaptation AGC operating unit, gives full play to AGC operating unit function
Rate regulating power avoids power grid operation personnel to the intervention of AGC operating unit quantity, is meeting under market price bidding mode electric electric power just
Chang Youxu supply realizes net source coordination development.
Detailed description of the invention
Fig. 1 is net source AGC collaboration allotment control schematic diagram；
Fig. 2 is conventional thermal power unit AGC control schematic diagram；
Fig. 3 is the regulations speed dynamic regulation method flow diagram of the invention based on the active ability monitoring of AGC unit.
Fig. 4 is the regulations speed dynamic regulation system schematic of the invention based on the active ability monitoring of AGC unit.
Specific embodiment
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described implementation
Example is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field is common
The application protection all should belong in technical staff's every other embodiment obtained without making creative work
Range.
The application in order to better understand explains in detail presently filed embodiment with reference to the accompanying drawing.
From the figure 3, it may be seen that the method in the present embodiment comprises the following processes:
According to the real-time steam extraction value of collected unit, its caused power of the assembling unit drop-out value is sought in calculating；
Performance number is fired according to power of the assembling unit drop-out value and collected unit power-handling capability, the minimum steady obtained, is calculated
The power ceiling value and power lower limit value of every unit are sought, i.e. the acquisition adjustable interval range of the power of the assembling unit；
Judge that unit realtime power value is in the position in the adjustable section of unit, if exceeding adjustable section, triggers grid side
Control is adjusted in agc mode operating unit regulations speed regulator control system.
Further, power of the assembling unit drop-out value caused by the real-time steam extraction value of unit calculate by 30T/h correspond to 10MW power into
Row calculates.
Further, the adjustable interval range calculation method of the power of the assembling unit is, power adjustable lower limit=minimum steady combustion performance number+
Power of the assembling unit drop-out value caused by steam extraction, power of the assembling unit drop-out value caused by the power adjustable upper limit=unit rated power-steam extraction.
Further, minimum steady combustion performance number should be lower than the 50% of unit rated power, be transformed according to unit depth peak regulation
Test situation determines afterwards, it is however generally that minimum steady fires performance number range in 30%-50%.
Further, grid side agc mode operating unit regulations speed distributes Controlling principle automatically: according to out-of-limit unit pair
The regulations speed answered is selected from the unit run in power adjustable interval range by index after the weighting of AGC unit from high to low
It takes.
Further, index calculation formula is S after the weighting of AGC uniti=(1-Qi%) (α Ni+βRiP), SiFor unit weighting
Index afterwards, Qi% is power of the assembling unit accounting value, NiFor monthly AGC unit integrated performance index, RiPFor power of the assembling unit regulations speed
Surplus can be promoted, α, β are weighting coefficient, the principle of performance are preferentially taken into account according to rate, coefficient is set to 0.4 and 0.6.
Further, power of the assembling unit regulations speed can promote surplus RiPBy power of the assembling unit regulations speed ceiling value and unit function
Rate regulations speed setting value, which is subtracted each other, to be acquired, i.e. RiP=RiH-Ri, RiHFor power of the assembling unit regulations speed ceiling value, RiFor the power of the assembling unit
Regulations speed setting value.
Further, power of the assembling unit regulations speed setting value RiCalculating be divided into two kinds of situations: when without unit carry out function
When rate regulations speed is promoted, former power regulation rate setpoints, i.e. R are kepti=RiO；It is mentioned when needing unit to carry out power regulation rate
When rising, amplitude need to be promoted with the power of the assembling unit regulations speed after judgement calculates by unit original power regulation rate setpoints and is added
It acquires, i.e. Ri=RiO+RiU；According to regional generation factory be incorporated into the power networks management implementation detailed rules and regulations regulation execute, unit original power regulation
Rate setpoints RiOTake the 1%-2% of unit rated active power.
Further, compensation unit is chosen according to the size of the corresponding regulations speed of out-of-limit unit, it is general to choose 2-4 platform
Unit, by the corresponding regulations speed mean allocation of out-of-limit unit to compensation unit, compensation unit number of units selection principle is as follows:
Wherein R is the corresponding regulations speed value of out-of-limit unit.
Fig. 4 is a kind of regulations speed dynamic regulation system based on the active ability monitoring of AGC unit provided by the present invention
Schematic diagram.As shown in figure 4, the regulations speed dynamic regulation system, comprising:
The real-time steam extraction value of unit that every is run under the AGC mode, which is sent, to be sought it to function module F (x) calculating and causes
Power of the assembling unit drop-out value, the value send all the way to subtracter block DEV1 the second input terminal and collected unit rated power
Value, which asks difference to obtain actual unit highest, can send out performance number, send all the way to the first input end of adder Module ADD1 with collect
Unit minimum steady combustion performance number sum to obtain that actual unit is minimum to send out performance number.
Collected unit realtime power value is sent all the way to the first input end of divider module DIV and subtracter block
The output of DEV1 finds out power of the assembling unit accounting value, send the analog input end of supreme lower bound alarm module HLALM all the way；High lower bound
The high and low limit value input terminal of alarm module HLALM is respectively connected to the output of subtracter block DEV1 and adder Module ADD1,
To monitor the whether higher limit of unit realtime power value or more lower bound.
Unit original power regulation rate setpoints are sent to the second input terminal of adder Module ADD2 and power of the assembling unit tune
Section rate need to promote amplitude summation, and the power of the assembling unit regulations speed setting value acquired is sent all the way to subtracter block DEV2's
Second input terminal send the analog input end of supreme lower bound clipping module HLLMT all the way；The first of subtracter block DEV2 is defeated
Enter end and receive collected unit regulations speed ceiling value, calculating, which acquires power of the assembling unit regulations speed, can promote surplus；High lower bound
The high and low limit value input terminal of clipping module HLLMT is respectively connected to collected unit regulations speed ceiling value and lower limit value.
Power of the assembling unit monitoring is with regulations speed regulator control system according to the shape of all units run under the agc mode monitored
State information judges that choosing suitable unit sending power of the assembling unit regulations speed needs promotion signal setting to analog quantity selector AXSEL
Position end, and the power of the assembling unit regulations speed need to be promoted into amplitude and given to the first input end of analog quantity selector AXSEL, analog quantity
The output of selector AXSEL is sent to the first input end of adder Module ADD2.
Wherein, unit regulations speed ceiling value need to dispatching of power netwoks department carry out AGC test with determine its amplitude size, one
As be unit rated active power 2.5%-4%；Unit regulations speed lower limit value is incorporated into the power networks management according to regional generation factory
The regulation of detailed rules for the implementation executes, and according to the difference of machine set type, takes the 1%-2% of unit rated active power.
By taking North China region province power grid as an example, the application example of method proposed by the invention in actual electric network is provided.
In net based on the 300MW grade direct-firing units of positive pressure, about more than 100 platform units put into operation daily when normal operation, integrally
Active power is about 48000MW, wherein fired power generating unit about 20 that investment AGC mode is run.According to " North China region power plant is simultaneously
Net operational management detailed rules for the implementation " as defined in power of the assembling unit regulations speed: the thermoelectricity of the drum boiler of general unit pulverized-coal system
Unit is the 1.5% of unit rated active power, and the general fired power generating unit with bin storage type pulverizing system is that unit is specified
The 2% of active power.
One day, 300MW grades of units are 16 in 20 AGC units of province's power grid, middle storage formula unit 4, power regulation speed
Rate is direct-firing unit 12；600MW grades of units are 4, are direct-firing unit.Then according to the rules, 300 and 600MW grades it is straight
The power regulation rate for blowing formula unit is respectively 4.5MW/min and 9MW/min, and the power regulation speed of formula unit is stored up in 300MW grades
Rate is 6MW/min.
When the daily 0:00 investment agc mode of successfully unit of bidding is run, unit is in normal adjustable range of operation, respectively
The former power regulation rate setpoints of unit are defined a reference value, and the regulations speed of 20 units of agc mode operation is such as
Shown in table 1.
The regulations speed table of 20 units of 1 agc mode of table operation
By taking certain 300MW grades of direct-firing AGC machine set PLC 7 as an example, rated power 300MW, it is 45% that minimum steady, which fires power,
Pe, as 135MW；If monitoring heat supply steam extraction 180T/h, calculating its corresponding power-down value by 30T/h is 60MW, then machine
Group highest can send out performance number Q7MAXIt is minimum to send out performance number Q for 300-60=240MW7MINFor 135+60=195MW.
If monitoring 7 realtime power value Q of machine set PLC7AThe AGC instruction issued with power grid rises to 240MW, then unit at this time
Power accounting value Q7% is 100%, while the real-time function of unit that high lower bound alarm module HLALM is received by analog input termination
Rate value Q1APerformance number Q can be sent out by reaching the unit highest that ceiling value input terminal receives7MAX, i.e. Q7A≥Q7MAX, then high lower bound alarm
The high limit warning output end D1 of module HLALM issues " the higher limit of the power of the assembling unit " alarm switch signal, power of the assembling unit monitoring with
Regulations speed regulator control system judges that it can not undertake grid power again and rise task according to the collected unit relevant information,
The power increment needs that i.e. unit undertakes are undertaken by the unit that other agc modes are run, the power tune of 4.5MW/min
Section rate value needs are shared by other units.
Compensation unit is chosen according to the size of the corresponding regulations speed of out-of-limit unit, it is general to choose 2-4 platform unit, it will more
It limits in the corresponding regulations speed mean allocation of unit to compensation unit, compensation unit number of units selection principle is as follows:
Wherein R is the corresponding regulations speed value of out-of-limit unit.
2 units need to be only chosen at this time to be shared.
At this point, being S according to index calculation formula after the weighting of AGC uniti=(1-Qi%) (α Ni+βRiP), power of the assembling unit monitoring
With calculated in regulations speed regulator control system acquire unit weighting after index SiAs shown in table 2.That is, the power of the assembling unit at this time
Monitoring and regulations speed regulator control system to the machine set PLC 11 (direct-firing 300MW unit) of index ranking front two after weighting and
PLC9 (middle storage formula formula 300MW unit) issues control instruction, i.e., issues " power of the assembling unit regulations speed respectively to PLC11 and PLC9
Needing promotion signal " switching value switching signal and 2.25MW/min power of the assembling unit regulations speed amplitude promote analog signals.At this point,
Machine set PLC 11 and the power of the assembling unit regulations speed of PLC9 are respectively 6.75MW/min and 8.25MW/min, with the faster machine of the two
Power regulation is organized to make up power limited problem caused by 7 steam extraction of machine set PLC, meets zero passage in AGC control performance assessment criteria
Requirement within the limits prescribed must be controlled with average value, it is ensured that power network safety operation.
2 AGC unit Weighted Guidelines S of tableiReal time data table
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (18)
1. a kind of regulations speed dynamic regulation method based on the active ability monitoring of AGC unit, which is characterized in that including walking as follows
It is rapid:
S1: according to the real-time steam extraction value of collected unit, its caused power of the assembling unit drop-out value is sought in calculating；
S2: performance number is fired according to power of the assembling unit drop-out value and collected unit power-handling capability, the minimum steady obtained, calculating is asked
Take the power ceiling value and power lower limit value of every unit, i.e. the acquisition adjustable interval range of the power of the assembling unit；
S3: judging that unit realtime power value is in the position in the adjustable section of unit, if exceeding adjustable section, triggers grid side
Control is adjusted in agc mode operating unit regulations speed regulator control system.
2. the method as described in claim 1, which is characterized in that in step S1, the power of the assembling unit caused by the real-time steam extraction value of unit
Drop-out value corresponds to 10MW power by 30-40T/h according to machine set type and is calculated.
3. the method as described in claim 1, which is characterized in that in step S2, interval range calculation method that the power of the assembling unit is adjustable
For, power of the assembling unit drop-out value caused by power adjustable lower limit=minimum steady combustion performance number+steam extraction, the power adjustable upper limit=unit volume
Determine power of the assembling unit drop-out value caused by power-steam extraction.
4. method as claimed in claim 1 or 3, which is characterized in that
In the step S2, minimum steady fires 50% that performance number is lower than unit rated power, and specific value is according to unit depth tune
Test situation determines after peak transformation.
5. method as claimed in claim 4, which is characterized in that minimum steady fires performance number range in unit rated power
30%-50%.
6. the method as described in claim 1, which is characterized in that in step S3, grid side agc mode operating unit regulations speed
Automatic distribution Controlling principle are as follows: according to the corresponding regulations speed of out-of-limit unit, from the machine run in power adjustable interval range
Group is chosen from high to low by index after the weighting of AGC unit.
7. method as claimed in claim 6, which is characterized in that the calculation formula of index after the AGC unit weighting are as follows:
Si=(1-Qi%) (α Ni+βRiP),
Wherein SiFor index after unit weighting, Qi% is power of the assembling unit accounting value, NiFor monthly AGC unit integrated performance index, RiP
Surplus can be promoted for power of the assembling unit regulations speed, α, β are weighting coefficient.
8. the method for claim 7, which is characterized in that preferentially take into account the principle of performance, factor alpha, β difference according to rate
It is set as 0.4 and 0.6.
9. the method for claim 7, which is characterized in that the power of the assembling unit regulations speed can promote surplus RiPBy unit
Power regulation rate ceiling value and power of the assembling unit regulations speed setting value, which are subtracted each other, to be acquired, i.e. RiP=RiH-Ri, RiHFor the power of the assembling unit
Regulations speed ceiling value, RiFor power of the assembling unit regulations speed setting value.
10. method as claimed in claim 9, which is characterized in that the power of the assembling unit regulations speed setting value RiCalculating be divided into
Two kinds of situations:
When carrying out the promotion of power regulation rate without unit, former power regulation rate setpoints R is keptiO, i.e. Ri=RiO；
When needing unit to carry out the promotion of power regulation rate, by unit original power regulation rate setpoints RiOWith through judgement selection after
Power of the assembling unit regulations speed need to promote amplitude RiUAddition acquires, i.e. Ri=RiO+RiU。
11. method as claimed in claim 10, which is characterized in that
The unit original power regulation rate setpoints RiOTake the 1%-2% of unit rated active power.
12. device according to claim 9, which is characterized in that the unit regulations speed ceiling value is tested true by AGC
Tentering value size.
13. device according to claim 12, which is characterized in that
The unit regulations speed ceiling value is the 2.5%-4% of unit rated active power.
14. the method as described in claim 6 or 10, which is characterized in that in the step S3, compensation unit number of units selection packet
It includes:
By in the corresponding regulations speed mean allocation of out-of-limit unit to compensation unit, compensation unit number of units selection principle is as follows:
Wherein R is the corresponding regulations speed value of out-of-limit unit.
15. a kind of regulations speed dynamic regulation device based on the active ability monitoring of AGC unit characterized by comprising function
Module F (x), analog quantity selector AXSEL, adder Module ADD1, adder Module ADD2, subtracter block DEV1, subtraction
Device module DEV2, divider module DIV, high lower bound alarm module HLALM, high lower bound clipping module HLLMT；
The real-time steam extraction value of unit that every runs under AGC mode is sent to function module F (x) calculating and seeks its caused machine
Group power-down value, the value are sent all the way to the second input terminal of subtracter block DEV1 and collected unit power-handling capability and are asked
Difference, which obtains actual unit highest, can send out performance number, be sent all the way to the first input end of adder Module ADD1 and collected machine
Group minimum steady combustion performance number sums to obtain that actual unit is minimum to send out performance number；
Collected unit realtime power value is sent all the way to the first input end of divider module DIV and subtracter block DEV1
Output find out power of the assembling unit accounting value, send the analog input end of supreme lower bound alarm module HLALM all the way；High lower bound alarm
The high and low limit value input terminal of module HLALM is respectively connected to the output of subtracter block DEV1 and adder Module ADD1, with monitoring
The whether higher limit of unit realtime power value or more lower bound；
Power of the assembling unit monitoring is believed with regulations speed regulator control system according to the state of all units run under the agc mode monitored
Breath, judging to choose suitable unit and issuing power of the assembling unit regulations speed needs promotion signal to the set end of analog quantity selector AXSEL,
And the power of the assembling unit regulations speed need to be promoted into amplitude and sent to the first input end of analog quantity selector AXSEL, analog quantity selection
The output of device AXSEL is sent to the first input end of adder Module ADD2；
Unit original power regulation rate setpoints are sent to the second input terminal of adder Module ADD2 and the power of the assembling unit and adjust speed
Rate need to promote amplitude summation, the power of the assembling unit regulations speed setting value acquired be sent all the way second defeated to subtracter block DEV2
Enter end, send the analog input end of supreme lower bound clipping module HLLMT all the way；The first input end of subtracter block DEV2 receives
Collected unit regulations speed ceiling value, calculating, which acquires power of the assembling unit regulations speed, can promote surplus；
The high and low limit value input terminal of high lower bound clipping module HLLMT be respectively connected to collected unit regulations speed ceiling value and
Lower limit value.
16. device according to claim 15, which is characterized in that the unit regulations speed ceiling value is tested by AGC
Determine that amplitude size unit regulations speed lower limit value is selected according to the difference of machine set type.
17. device according to claim 16, which is characterized in that
The unit regulations speed ceiling value is the 2.5%-4% of unit rated active power, and unit regulations speed lower limit value takes
The 1%-2% of unit rated active power.
18. device according to claim 15, which is characterized in that
The unit original power regulation rate setpoints take the 1%-2% of unit rated active power.
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