CN105990844B - A kind of method of real-time adjustment that dc power follows wind power to fluctuate - Google Patents
A kind of method of real-time adjustment that dc power follows wind power to fluctuate Download PDFInfo
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Abstract
The present invention provides the method for real-time adjustment that a kind of dc power follows wind power to fluctuate, this method is sending receiving end power grid wind promptly just by specified direct current, negative rotation turns spare unit to cope with being widely varied for wind power, by direct current send receiving end power grid AGC unit and dc power adjust automatically come automatically adjust direct current sending end power grid wind power fluctuation, this method considers direct current and send receiving end power grid regulating power, dc power conveying capacity, dc power tap switch regulating power, the factors such as different adjustable strategies, method is pratical and feasible, the deficiency of dc power arrangement method in current wind-powered electricity generation delivery system can effectively be solved, flexible modulation dc power, give full play to regulating power and complementation control characteristic that direct current send receiving end power grid, effectively improve the digestion capability of wind-powered electricity generation.
Description
Technical field
The present invention relates to a kind of method of power system automatic field, in particular to a kind of dc power follows wind-powered electricity generation
The method of real-time adjustment of power swing.
Background technique
People are to the application of electric energy and understanding first since direct current.French physician and the Depew electrician M.
The 3 horsepowers of dc generator electricity energy that will be installed in the Bach's coal mine of Meath in 1882 are strangled, it is straight with 1500~2000 volts
Galvanic electricity pressure has been sent in Munich international fair other than 57 kilometers, completes transmission of electricity test for the first time.Hereafter in 20th century
Just, the voltage, power of experimental direct current transportation and distance respectively reached 125 kilovolts, 20 megawatts and 225 kilometers.But due to
It is connected using dc generator and obtains high-voltage DC power supply, receiving end motor is also to be run with series system, not only high pressure great Rong
It measures the commutation difficulty of direct current generator and is restricted, the mode of series operation is also more complicated, poor reliability, therefore direct current transportation
It is not further developed in the period of nearly half a century.In 30~fifties of 20th century, people explore various devices
Inverter is constituted as DC high voltage power supply, to substitute dc generator, so that controllable mercury inverter is had developed, for hair
Exhibition high-power direct current transportation opens road.One 96 kilometers long are built up between Sweden native country in 1954 and Goethe's Orchid Island
Submarine cable DC transmission line, DC voltage are ± 100 kilovolts, and it is first industrialness in the world that transimission power, which is 20 megawatts,
High-voltage dc transmission electric wire, since fruit spy's Orchid Island DC transmission engineering is built up, direct current transportation is valued by the people simultaneously again
It emerges rapidly.The appearance of later period fifties silicon controlled rectifier opens new approach for the manufacture of converter.20th century
The seventies, with the development of controllable silicon technology advanced by leaps and bounds, the technical advantage of D.C. high voltage transmission also becomes clear day by day.30 years
Come, with the progress of power electronic technique, direct current transportation has new development.The direct current to have put into operation in the world to the eighties
Power transmission engineering shares nearly 30, and about 20,000 megawatts of total transmission capacity, longest conveying distance is more than 1,000 kilometers.
From late 1950s, tracking world's HVDC Transmission Technology development has started HVDC Transmission Technology and has ground for China
Study carefully.The seventies builds up direct current transportation experimental project in Shanghai, builds up Zhoushan direct current transportation type approval test engineering the end of the eighties,
Nineteen ninety builds up the first large capacity of China, remote DC transmission engineering --- Ge Zhou Ba-Shanghai high voltage direct current transmission project
(500kV,1200MW).By the development of more than ten years great-leap-forward, Chinese high voltage dc transmission technology and its engineer application have been obtained
To rapid development, conventional high-pressure DC transmission engineering equipment has realized production domesticization.By the super-pressure that the end of the year 2009, China put into operation
And following DC transmission engineering has 18, total capacity 33570MW, DC power transmission line overall length 11841km.China has become at present
Direct current transportation big country.Burner zone in 2010-Shanghai ± 800kV extra-high voltage direct-current transmission demonstration project puts into operation, silk screen-in 2012
Southern Jiangsu ± 800kV extra-high voltage direct-current transmission engineering, which is built up, to put into operation, the maximum direct current transportation work of transmission power in the world in 2014
Journey --- Ha Minan-Zhengzhou ± 800 kilovolt extra-high voltage direct-current transmission engineering formally puts into operation.Extra-high voltage direct-current transmission is in
State is practiced and is developed.
Since Chinese energy is extremely uneven with power load distributing, non-renewable energy resource be mainly distributed on the density of population it is low, with energy
Small, the underdeveloped southwest of demand, northwest and northern outlying district.Load is concentrated mainly on east midland developed area.
For root it was predicted that this following status will continue, China Power flow direction will be presented what extensive transferring electricity from the west to the east was sent with nortel south
Overview.And according to the technical characterstic of direct current transportation, the following direct current transportation will be positioned in the long distance of Chinese large-scale Energy Base
It is sent outside from, large capacity, such as southwestern Hydropower Base, northwest and Xinjiang coal electricity, wind power base and transnational electric power can pass through direct current
Conveying.
Currently, China is completed the DC engineering to put into operation, power arranges generally to press two-period form power curve or constant function
The mode of rate arranges, and when direct current sending end power grid when containing large-scale wind power, this mode arranges to need sending end power grid alone bear wind
The pressure such as peak regulation, frequency modulation caused by electrical power fluctuates, future often may be used when the installation of direct current sending end power grid wind is larger
It can cause wind-abandoning phenomenon because direct current sending end power grid regulating power is limited, cause economic loss, such arrangement side of dc power
Formula cannot make full use of direct current to send the complementary control characteristic of receiving end power grid and the regulating power of receiving end power grid, not adapt to extensive
The development of wind-powered electricity generation is sent outside.
Accordingly, it is desirable to provide a kind of method of real-time adjustment that novel dc power follows wind power to fluctuate.
Summary of the invention
To overcome above-mentioned the deficiencies in the prior art, the present invention provides a kind of dc power to follow wind power to fluctuate real-time
Method of adjustment.
Realize solution used by above-mentioned purpose are as follows:
A kind of method of real-time adjustment that dc power follows wind power to fluctuate, the described method comprises the following steps:
I, the spare startup threshold values of wind power positive rotation and the negative spinning reserve startup threshold values of wind power are determined；
II, the wind power value deviation delta P for determining wind power real-time measurement values and being included in generation schedulew_real_plan, and
The initial value for giving wind power value deviation adjusted is the initial wind power value deviation；
III, judge whether the initial value of the wind power value deviation adjusted is out-of-limit, it is not out-of-limit, IV is entered step,
It is out-of-limit, the urgent spinning reserve unit of wind-powered electricity generation is adjusted, and update the wind power value deviation adjusted；
Wind power value deviation delta P ' adjusted described in IV, comparisonw_real_planWith the negative spinning reserve starting of wind power
Threshold values Pw_emergency_T_down:
If Δ P 'w_real_plan> Pw_emergency_T_down, it is determined that abandonment amount Pw_abandoned, and update described adjusted
Wind power value deviation delta P 'w_real_plan；Otherwise V is entered step；
V, dc power adjustable strategies are investigated, are adjusted in real time under the different dc power adjustable strategies using correlation method
Save dc power.
Compared with prior art, scheme provided by the invention has following excellent effect:
1, method provided by the invention send receiving end power grid to specify wind-powered electricity generation using direct current promptly positive and negative spinning reserve unit is answered
It fluctuates widely to wind power, proposes the automatic adjustment for sending receiving end power grid AGC unit and dc power using direct current, make
Send receiving end power grid both participate in wind power fluctuation adjusting, mentioned method consider direct current send receiving end power grid regulating power, directly
The factors such as power delivering capability, direct current tap switch-mode regulation ability, different adjustable strategies are flowed, the dc power provided is with the wind
The shortcomings that automatic adjusting method of electrical power fluctuation is pratical and feasible, and current customary DC power can be overcome to arrange, flexible modulation is straight
Power is flowed, makes full use of direct current to send the adjusting resource and complementary control characteristic of receiving end power grid, so that direct current is sent receiving end power grid while joining
With the adjusting of wind power fluctuation, expand wind electricity digestion range, improves wind electricity digestion capability.
2, method provided by the invention compensates for the deficiency of dc power arrangement in existing wind-powered electricity generation delivery system, Ke Yiyong
The real-time adjustment that dc power follows wind power to fluctuate in wind-powered electricity generation delivery system, mentioned method propose promptly standby using wind-powered electricity generation
Fluctuating widely for wind power is coped with unit, proposes the reality that receiving end power grid AGC unit and dc power are sent using direct current
When adjust to cope with the routine fluctuations of wind power, mentioned method has comprehensively considered direct current and has sent receiving end power grid regulating power, direct current
The factors such as the limitation of power transmission power, direct current tap switch-mode regulation ability, different adjustable strategies, the dc power side of adjustment in real time
Method reasonable can preferably improve electric system to the responding ability of wind power random fluctuation.
3, through the invention provided by method, direct current in wind-powered electricity generation delivery system can be made full use of to send the mutual of receiving end power grid
Control characteristic and regulating power are mended, effectively increases the consumption range of wind-powered electricity generation, improves the digestion capability of wind-powered electricity generation.The side that the present invention is mentioned
Method is also extrapolated in other fitful power direct current delivery systems such as photovoltaic.
Detailed description of the invention
Fig. 1 is the method for real-time adjustment flow chart that dc power follows wind power to fluctuate in the present invention；
It is excellent by direct current sending end power grid in the method for real-time adjustment that Fig. 2 follows wind power to fluctuate for dc power in the present invention
First adjust Developing Tactics flow chart；
Fig. 3 is wind power direct current delivery system figure in the present embodiment；
Fig. 4 is preferentially to adjust the dc power that strategy obtains by direct current sending end power grid in the present embodiment to adjust result song in real time
Line chart；
Fig. 5 is to send the receiving end mains frequency deviation dc power that real-time adjustable strategies obtain real-time by direct current in the present embodiment
Adjust result curve figure；
Fig. 6 is to send the receiving end dc power that power grid AGC unit regulating power adjustable strategies obtain by direct current in the present embodiment
Adjustment result curve figure in real time；
Fig. 7 is when preferentially being adjusted strategy by direct current sending end power grid in the present embodiment and considered direct current tap switch-mode regulation ability
Obtained dc power adjusts result curve figure in real time；
Fig. 8 is to send the real-time adjustable strategies of receiving end mains frequency deviation by direct current in the present embodiment and consider direct current tap switch
The dc power obtained when regulating power adjusts result curve figure in real time；
Fig. 9 is to send receiving end power grid AGC unit regulating power adjustable strategies by direct current in the present embodiment and consider direct current tap
The dc power obtained when switch-mode regulation ability adjusts result curve figure in real time.
Specific embodiment
A specific embodiment of the invention is described in further detail with reference to the accompanying drawing.
The present invention provides a kind of method of real-time adjustment that dc power follows wind power to fluctuate.It obtains first following related
Parameter:
(1) the dc power value P of dc power curve arrangementD.If (without dc power curve arrangement, 0) which is
(2) wind power real-time measurement values Pw。
(3) it is included in the wind power value P of generation schedulew_plan.If (wind power is not included in generation schedule, 0) which is
(4) direct current minimum delivery power PD_min.(value can be manually set as needed, it is not limited in DC techniques
Minimum delivery power)
(5) direct current sending end power grid AGC unit positive regulator ability Ps_AGC_up。
(6) direct current sending end power grid AGC unit down regulation capacity Ps_AGC_down。
(7) direct current receiving end power grid AGC unit positive regulator ability Pr_AGC_up。
(8) direct current receiving end power grid AGC unit down regulation capacity Pr_AGC_down。
(9) the spare startup threshold values P of wind power positive rotationw_emergency_T_up> 0.
(10) the negative spinning reserve startup threshold values P of wind powerw_emergency_T_down> 0.
(11) the spare unit pondage P of the urgent positive rotation of direct current sending end power grid winds_w_emergency_reserve_up。
(12) the spare unit pondage P of the urgent positive rotation of direct current receiving end power grid windr_w_emergency_reserve_up。
(13) the urgent negative rotation of direct current sending end power grid wind turns spare unit pondage Ps_w_emergency_reserve_down。
(14) the urgent negative rotation of direct current receiving end power grid wind turns spare unit pondage Pr_w_emergency_reserve_down。
(15) direct current sending end power grid combination frequency response characteristic factor betas。
(16) direct current receiving end power grid combination frequency response characteristic factor betar。
(17) direct current sending end mains frequency measured value fs。
(18) direct current receiving end mains frequency measured value fr。
(19) direct current tap switch is adjusted up ability PD_λlimit_up。
(20) direct current tap switchs downward regulating power PD_λlimit_down。
(21) dc power adjustable strategies, it may include: strategy is preferentially adjusted by direct current sending end power grid, send receiving end electric by direct current
The real-time adjustable strategies of net frequency departure are sent receiving end power grid AGC unit regulating power adjustable strategies by direct current, consider tap switch most
Big regulating power adjustable strategies.
After obtaining parameter, the real-time adjustment that dc power follows wind power to fluctuate is realized according to following methods, it is specific to wrap
Include following steps:
Step 1: determining the spare startup threshold values of wind power positive rotation and the negative spinning reserve startup threshold values of wind power；
Step 2: calculating wind power real-time measurement values and the wind power value deviation delta for being included in generation schedule
Pw_real_plan, and determine that the initial value of the wind power value deviation adjusted is to calculate the wind power value deviation obtained；
Step 3: judge whether the initial value of the wind power value deviation adjusted is out-of-limit, and it is not out-of-limit, it enters step
Four, it is out-of-limit, the urgent spinning reserve unit of wind-powered electricity generation is adjusted, and update the wind power value deviation adjusted；
Step 4: the wind power value deviation delta P ' adjustedw_real_planWith the negative spinning reserve of wind power
Startup threshold values Pw_emergency_T_down:
If Δ P 'w_real_plan> Pw_emergency_T_down, it is determined that abandonment amount Pw_abandoned, and update described adjusted
Wind power value deviation delta P 'w_real_plan；Otherwise V is entered step；
Step 5: investigating dc power adjustable strategies, correlation method is used under the different dc power adjustable strategies
Dc power is adjusted in real time.
In step 1, under different dc power adjustable strategies, the spare startup threshold values of wind power positive rotation are determined
With the negative spinning reserve startup threshold values of wind power；
According to preferentially adjusting strategy by direct current sending end power grid, send receiving end mains frequency deviation real-time adjustable strategies by direct current
Or receiving end power grid AGC unit regulating power adjustable strategies are sent by direct current, (1), (2) determine the wind power positive rotation as the following formula
Spare startup threshold values and the negative spinning reserve startup threshold values of the wind power:
Pw_emergency_T_up=Ps_AGC_up+min(max(PD-PD_min,0),Pr_AGC_up) (1)
Pw_emergency_T_down=Ps_AGC_down+min(max((PDN-PD),0),Pr_AGC_down) (2)
According to tap switch maximal regulated capacity adjusting strategy is considered, then (3), (4) determine wind-powered electricity generation function respectively as the following formula
The spare startup threshold values of rate positive rotation and the negative spinning reserve startup threshold values of wind power:
Pw_emergency_T_up=Ps_AGC_up+min(max(PD-PD_min,0),Pr_AGC_up,PD_λlimit_down) (3)
Pw_emergency_T_down=Ps_AGC_down+min(max((PDN-PD),0),Pr_AGC_down,PD_λlimit_up) (4)
In above formula (1)-(4), Ps_AGC_upFor direct current sending end power grid AGC unit positive regulator ability, Pr_AGC_upFor direct current receiving end
Power grid AGC unit positive regulator ability, Ps_AGC_downFor direct current sending end power grid AGC unit down regulation capacity, Pr_AGC_downFor direct current by
Hold power grid AGC unit down regulation capacity, PDFor the dc power value of dc power curve arrangement, PDNFor direct current rated power,
PD_λlimit_upAbility, P are adjusted up for direct current tap switchD_λlimit_downDownward regulating power, P are switched for direct current tapD_min
For direct current minimum delivery power, PD_min=0.1*PDN, PDNFor direct current rated power.
Step 2 include: as the following formula (5) determine the wind power real-time measurement values and the wind-powered electricity generation function for being included in generation schedule
Rate value deviation: Δ Pw_real_plan=Pw-Pw_plan (5)
In formula, PwFor wind power real-time measurement values, Pw_planFor the wind power value for being included in generation schedule.
The purpose of method of the invention is the real-time adjustment by dc power, so that direct current is sent receiving end power grid while coping with wind-powered electricity generation
Influence of the power deviation to power grid.Reply wind power deviation first has to consider whether the deviation in direct current send receiving end power grid AGC
In the adjustable range of unit, if deviation is larger, the adjustable range of receiving end power grid AGC unit is sent beyond direct current, then must start up
The urgent spinning reserve unit of wind-powered electricity generation handles the skew component beyond AGC unit regulating power, to avoid power grid thing
Therefore.After being handled by wind-powered electricity generation emergency use unit wind power deviation, remaining wind power deviation should be able to be in direct current
It send within the scope of receiving end power grid AGC unit regulating power (otherwise, power grid is unbearable, may lead power grid accident etc.).Wind-powered electricity generation
The enabling of urgent spinning reserve unit depends on the size of wind power deviation, if initial wind power deviation without departing from
Direct current send the AGC unit regulating power of receiving end power grid, then need not enable the urgent spinning reserve unit of wind-powered electricity generation, it is only necessary to which direct current send receiving end
Power grid AGC unit is directly adjusted.If initial wind power deviation send the AGC unit of receiving end power grid beyond direct current
Regulating power after must then enabling the urgent spinning reserve unit of wind-powered electricity generation, could send the AGC machine of receiving end power grid in later use direct current
Group is adjusted.
It is objective fact due to calculating the determining wind power value deviation, and the wind power value adjusted is inclined
Poor then wind power value deviation after being coped with for virtual power grid, can change with the counter-measure of power grid.Therefore, it counts
It during calculation, will not be modified to the determining wind power value deviation is calculated, can only be arranged according to the possible reply of power grid
It applies and the virtual wind power value deviation adjusted is updated and is adjusted.Therefore, at the beginning of calculating, i.e. step 2
In, the initial value for giving the wind power value deviation adjusted first is to calculate the determining wind power value deviation, it may be assumed that
Give the initial value Δ P ' of wind power value deviation adjustedw_real_plan=Δ Pw_real_plan。
And in the next steps, then the counter-measure that can be done according to power grid is inclined to the wind power value adjusted
Difference is updated and adjusts.
Step 3, for judge wind power real-time measurement values and be included in generation schedule wind power value deviation whether mistake
Greatly, the starting urgent spinning reserve unit of wind-powered electricity generation is needed to be adjusted if excessive.Step 3 is realized through specified direct current sending end electricity
Promptly positive and negative spinning reserve unit copes with being widely varied for wind power for net, receiving end power grid wind.
It is specific as follows；
The step 3 includes: the spare startup threshold values P of wind power positive rotation described in comparisonw_emergency_T_up, the wind
The negative spinning reserve startup threshold values P of electrical powerw_emergency_T_downWith the initial value Δ P of the wind power value deviationw_real_plan:
If 1. ,-Pw_emergency_T_up< Δ Pw_real_plan< Pw_emergency_T_down, then four are entered step；
If 2., Δ Pw_real_plan> Pw_emergency_T_down, then (6) determine that direct current sending end power grid wind is promptly born as the following formula
Spinning reserve unit pondage:
ΔPs_w_emergency_reserve_down=-min (Δ Pw_real_plan-Pw_emergency_T_down,
Ps_w_emergency_reserve_down) (6)
(7) determine direct current sending end power grid wind power value deviation adjusted as the following formula::
ΔP′w_real_plan=Δ P 'w_real_plan+ΔPs_w_emergency_reserve_down (7)
(8) determine that the urgent negative rotation of direct current receiving end power grid wind turns spare unit pondage as the following formula:
ΔPr_w_emergency_reserve_down=-min (Δ P 'w_real_plan-Pw_emergency_T_down,
(8)
max(PDN-PD,0),Pr_w_emergency_reserve_down)
(9) determine direct current receiving end power grid wind power value deviation adjusted as the following formula:
ΔP′w_real_plan=Δ P 'w_real_plan+ΔPr_w_emergency_reserve_down (9)
(10) determine direct current adjustment amount Δ P as the following formulaD:
ΔPD=-Δ Pr_w_emergency_reserve_down (10)
Adjust dc power value PD_new=PD+ΔPD；
If 3., Δ Pw_real_plan<-Pw_emergency_T_up, then (11) determine direct current sending end power grid wind promptly just as the following formula
Spinning reserve unit pondage:
ΔPs_w_emergency_reserve_up=min (- Δ Pw_real_plan-Pw_emergency_T_up,Ps_w_emergency_reserve_up) (11)
(12) determine direct current sending end power grid wind power value deviation adjusted as the following formula:
ΔP′w_real_plan=Δ P 'w_real_plan+ΔPs_w_emergency_reserve_up (12)
(13) determine the spare unit pondage of the urgent positive rotation of direct current receiving end power grid wind as the following formula:
ΔPr_w_emergency_reserve_up=min (- Δ P 'w_real_plan-Pw_emergency_T_up,
(13)
max(PD-PD_min,0),Pr_w_emergency_reserve_up)
(14) determine direct current receiving end power grid wind power value deviation adjusted as the following formula:
ΔP′w_real_plan=Δ P 'w_real_plan+ΔPr_w_emergency_reserve_up (14)
(15) determine direct current adjustment amount Δ P as the following formulaD:
ΔPD=-Δ Pr_w_emergency_reserve_up (15)
Adjust dc power value PD_new=PD+ΔPD；
In formula, Δ Pw_real_planFor wind power real-time measurement values and it is included in the wind power value deviation of generation schedule,
Pw_emergency_T_upFor the spare startup threshold values of wind power positive rotation, PD_minFor direct current minimum delivery power, PDFor dc power
The dc power value of curve arrangement, PDNFor direct current rated power.
Step 4 include: as the following formula (17) determine the abandonment amount Pw_abandoned,
Pw_abandoned=Δ P 'w_real_plan-Pw_emergency_T_down (17)
(18) adjust the wind power real-time measurement values and are included in the wind power value deviation of generation schedule as the following formula, really
The fixed wind power value deviation delta P ' adjustedw_real_plan, the wind power value deviation send receiving end power grid AGC in direct current
The regulating power range of unit, i.e.-Pw_emergency_T_up< Δ P 'w_real_plan< Pw_emergency_T_down；
ΔP′w_real_plan=Δ P 'w_real_plan-Pw_abandoned (18)
In formula, Pw_emergency_T_downFor the negative spinning reserve startup threshold values of wind power.
In step 5, realize through direct current sending end power grid, the AGC unit of receiving end power grid and the adjust automatically of dc power
To automatically adjust the wind power fluctuation of direct current sending end power grid.
In step 5, the dc power adjustable strategies include preferentially adjusting strategy by direct current sending end power grid, sending by direct current
The real-time adjustable strategies of receiving end mains frequency deviation are sent receiving end power grid AGC unit regulating power adjustable strategies by direct current and consider to divide
Connect switch maximal regulated capacity adjusting strategy.
(1), when using strategy is preferentially adjusted by direct current sending end power grid, real-time adjusting dc power the following steps are included:
1., judge wind power real-time measurement values adjusted and the wind power value deviation delta of being included in generation schedule
P′w_real_planWhether 0 is greater than:
If Δ P 'w_real_plan> 0, it is determined that direct current sending end power grid AGC unit negative regulator amount Δ Ps_w_AGC_downAre as follows:
ΔPs_w_AGC_down=-min (max (Pw-PD_min,0),ΔP′w_real_plan,Ps_w_AGC_down)
Update the wind power value deviation are as follows:
ΔP′w_real_plan=Δ P 'w_real_plan+ΔPs_w_AGC_down
Determine direct current receiving end power grid AGC unit negative regulator amount Δ Pr_w_AGC_downAre as follows:
ΔPr_w_AGC_down=-min (Δ P 'w_real_plan,max(PDN-PD_new,0),Pr_w_AGC_down)
Determine direct current adjustment amount are as follows: Δ PD=-Δ Pr_w_AGC_down；
The dc power of update are as follows: PD_new=PD_new+ΔPD
If Δ P 'w_real_plan< 0, it is determined that direct current sending end power grid AGC unit positive regulator amount Δ Ps_w_AGC_upAre as follows:
ΔPs_w_AGC_up=min (- Δ P 'w_real_plan,Ps_w_AGC_up)
Update the wind power value deviation are as follows:
ΔP′w_real_plan=Δ P 'w_real_plan+ΔPs_w_AGC_up
Determine direct current receiving end power grid AGC unit positive regulator amount Δ Pr_w_AGC_upAre as follows:
ΔPr_w_AGC_up=min (- Δ P 'w_real_plan,max(PD_new-PD_min,0),Pr_w_AGC_up)
Determine direct current adjustment amount are as follows: Δ PD=-Δ Pr_w_AGC_up；
The dc power of update are as follows: PD_new=PD_new+ΔPD；
In formula, PwWind power real-time measurement values, PD_minDirect current minimum delivery power, Δ PDFor direct current adjustment amount.
(2), when using it is described send receiving end mains frequency deviation real-time adjustable strategies by direct current when, adjust direct current function in real time
Rate the following steps are included:
The frequency of real-time monitoring sending end power grid and receiving end power grid determines direct current adjustment amount:
Dc power is adjusted according to the frequency departure of the sending end power grid and receiving end power grid:
PD_new=PD_new+ΔPD
In formula, PD_minFor direct current minimum delivery power, PD_newFor updated dc power, PDNFor direct current rated power,
βsFor direct current sending end power grid combination frequency response characteristic coefficient, βrFor direct current receiving end power grid combination frequency response characteristic coefficient, fsFor
Direct current sending end mains frequency measured value, frFor direct current receiving end mains frequency measured value.
(3), when sending receiving end power grid AGC unit regulating power adjustable strategies by direct current described in, direct current is adjusted in real time
Power the following steps are included:
Determine direct current adjustment amount are as follows:
Dc power is adjusted as the following formula:
PD_new=PD_new+ΔPD
In formula, PD_minFor direct current minimum delivery power, PD_newFor updated dc power, PDNFor direct current rated power,
ΔPr_AGCFor direct current receiving end power grid AGC unit regulating power difference, Δ Ps_AGCFor direct current sending end power grid AGC unit regulating power
Difference, Δ P 'w_real_planFor wind power real-time measurement values adjusted and it is included in the wind power value deviation of generation schedule；
ΔPr_AGCFor direct current receiving end power grid AGC unit regulating power, as Δ P 'w_real_planWhen > 0, Δ Pr_AGC=
Pr_w_AGC_down；As Δ P 'w_real_planWhen < 0, Δ Pr_AGC=Pr_w_AGC_up；
ΔPs_AGCFor direct current sending end power grid AGC unit regulating power, as Δ P 'w_real_planWhen > 0, Δ Ps_AGC=
Ps_w_AGC_down；As Δ P 'w_real_planWhen < 0, Δ Ps_AGC=Ps_w_AGC_up。
(4), consider that tap switch maximal regulated capacity adjusting strategy includes: to increase direct current tap switch to be adjusted up energy
What power and downward regulating power limited preferentially adjusts strategy by direct current sending end power grid, send receiving end mains frequency deviation real-time by direct current
Adjustable strategies and receiving end power grid AGC unit regulating power adjustable strategies are sent by direct current.
1., when using it is described increase direct current tap switch be adjusted up ability and downward regulating power limitation given by direct current
End power grid is when preferentially adjusting strategy, real-time adjusting dc power the following steps are included:
If judging Δ P 'w_real_plan> 0, it is determined that direct current sending end power grid AGC unit negative regulator amount Δ Ps_w_AGC_downAre as follows:
ΔPs_w_AGC_down=-min (max (Pw-PD_min,0),ΔP′w_real_plan,Ps_w_AGC_down)
Update the wind power value deviation are as follows:
ΔP′w_real_plan=Δ P 'w_real_plan+ΔPs_w_AGC_down
Determine direct current receiving end power grid AGC unit negative regulator amount Δ Pr_w_AGC_downAre as follows:
ΔPr_w_AGC_down=-min (Δ P 'w_real_plan,max(PDN-PD_new,0),Pr_w_AGC_down,PD_λlimit_up)
Determine direct current adjustment amount are as follows:
ΔPD=-Δ Pr_w_AGC_down
Adjust dc power value are as follows: PD_new=PD_new+ΔPD
If judging Δ P 'w_real_plan< 0, it is determined that direct current sending end power grid AGC unit positive regulator amount Δ Ps_w_AGC_upAre as follows:
ΔPs_w_AGC_up=min (- Δ P 'w_real_plan,Ps_w_AGC_up)
Update the wind power value deviation are as follows:
ΔP′w_real_plan=Δ P 'w_real_plan+ΔPs_w_AGC_up
Determine direct current receiving end power grid AGC unit positive regulator amount Δ Pr_w_AGC_upAre as follows:
ΔPr_w_AGC_up=min (- Δ P 'w_real_plan,max(PD_new-PD_min,0),Pr_w_AGC_up,PD_λlimit_down)
Direct current adjustment amount are as follows:
ΔPD=-Δ Pr_w_AGC_up
Adjust dc power value are as follows: PD_new=PD_new+ΔPD
In formula, PwWind power real-time measurement values, PD_minDirect current minimum delivery power, Δ PDFor direct current adjustment amount.
2., when using it is described increase direct current tap switch be adjusted up ability and downward regulating power limitation given by direct current
When the real-time adjustable strategies of receiving end mains frequency deviation, adjust dc power in real time the following steps are included:
The frequency of real-time monitoring sending end power grid and receiving end power grid determines direct current adjustment amount:
Dc power is adjusted according to the frequency departure of the sending end power grid and receiving end power grid:
PD_new=PD_new+ΔPD
In formula, PD_λlimit_upAbility, P are adjusted up for direct current tap switchD_λlimit_downIt is downward for direct current tap switch
Regulating power, in formula, PD_minFor direct current minimum delivery power, PD_newFor updated dc power, PDNFor the specified function of direct current
Rate, βsFor direct current sending end power grid combination frequency response characteristic coefficient, βrFor direct current receiving end power grid combination frequency response characteristic coefficient,
fsFor direct current sending end mains frequency measured value, frFor direct current receiving end mains frequency measured value；
3., when using it is described increase direct current tap switch be adjusted up ability and downward regulating power limitation given by direct current
When receiving end power grid AGC unit regulating power adjustable strategies, in real time adjust dc power the following steps are included:
Determine direct current adjustment amount are as follows:
Dc power is adjusted as the following formula:
PD_new=PD_new+ΔPD
In formula, PD_λlimit_upAbility, P are adjusted up for direct current tap switchD_λlimit_downIt is downward for direct current tap switch
Regulating power, PD_minFor direct current minimum delivery power, PD_newFor updated dc power, PDNFor direct current rated power, Δ
Ps_AGCFor direct current sending end power grid AGC unit regulating power difference, Δ P 'w_real_planFor wind power real-time measurement adjusted
It is worth and is included in the wind power value deviation of generation schedule；
ΔPr_AGCFor direct current receiving end power grid AGC unit regulating power, as Δ P 'w_real_planWhen > 0, Δ Pr_AGC=
Pr_w_AGC_down；ΔP′w_real_planWhen < 0, Δ Pr_AGC=Pr_w_AGC_up；
ΔPs_AGCFor direct current sending end power grid AGC unit regulating power, as Δ P 'w_real_planWhen > 0, Δ Ps_AGC=
Ps_w_AGC_down；ΔP′w_real_planWhen < 0, Δ Ps_AGC=Ps_w_AGC_up。
The embodiment for the method for real-time adjustment that one follows wind power to fluctuate with dc power of the invention is provided, first
It needs to obtain relevant parameter, comprising:
Wind power real-time amount measured value Pw, the corresponding wind power consumption value P of ultra-short term dc power curvew_plan, direct current
The positive and negative regulating power P of sending end power grid AGC units_AGC_up、Ps_AGC_down, the positive and negative regulating power of direct current receiving end power grid AGC unit
Pr_AGC_up、Pr_AGC_down, direct current send the urgent positive rotation of receiving end power grid wind spare unit pondage
Ps_w_emergency_reserve_up、Pr_w_emergency_reserve_up, direct current send the urgent negative rotation of receiving end power grid wind to turn spare unit and adjusts
Capacity Ps_w_emergency_reserve_down、Pr_w_emergency_reserve_down, direct current send receiving end power grid combination frequency response characteristic coefficient
βs、βr, direct current send receiving end mains frequency measured value fs、frEqual data informations are shown in Table 1.
Table 1 is wind power real-time amount measured value, is included in the wind power of generation schedule and adjusts in real time for dc power
Other whole tables of data.
With method of the invention, specifically includes the following steps:
Moment 0
The corresponding dc power of dc power curve is PD=0MW.The wind power for being included in generation schedule is Pw_plan=
0MW。
Step 1:
Given direct current minimum delivery power is the 10% of direct current rated power, i.e. PD_min=0.1*PDN=800MW.
The given spare startup threshold values of wind power positive rotation:
Pw_emergency_T_up=Ps_AGC_up+min(max(PD-PD_min,0),Pr_AGC_up)
=4000MW+min (max (0-800,0), 5000) MW
=4000MW
The given negative spinning reserve startup threshold values of wind power:
Pw_emergency_T_down=Ps_AGC_down+min(max((PDN-PD),0),Pr_AGC_down)
=4000MW+min (max (8000-0), 0), 5000) MW
=9000MW
If dc power adjustable strategies are to consider tap switch maximal regulated capacity adjusting strategy, wind power is being given just
Spinning reserve startup threshold values are as follows:
Pw_emergency_T_up=Ps_AGC_up+min(max(PD-PD_min,0),Pr_AGC_up,PD_λlimit_down)
=4000MW+min (max (0-800,0), 5000,1200) MW
=4000MW
The given negative spinning reserve startup threshold values of wind power are as follows:
Pw_emergency_T_down=Ps_AGC_down+min(max((PDN-PD),0),Pr_AGC_down,PD_λlimit_up)
=4000MW+min (max (8000-0), 0), 5000,2160) MW
=6160MW
Step 2:
Calculate wind power real-time measurement values and the wind power deviation delta P for being included in generation schedulew_real_plan=Pw-
Pw_plan=4953.6MW-0MW=4953.6MW.
It gives wind power real-time measurement values adjusted and is included in the wind power value deviation initial value Δ of generation schedule
P′w_real_plan=Δ Pw_real_plan=4953.6MW.
Step 3: the urgent spinning reserve unit adjustment of wind-powered electricity generation.
Judgement-Pw_emergency_T_up< Δ Pw_real_plan< Pw_emergency_T_down, receiving end power grid wind is sent without starting direct current
Electric urgent spinning reserve unit.ΔPD=0MW, Δ P 'w_real_plan=4953.6MW, PD_new=PD+ΔPD=0MW, is walked
Rapid 4.
Step 4: judge Δ P 'w_real_plan< Pw_emergency_T_down, it is not necessarily to abandonment.
After the completion of step 4, the wind power real-time measurement values after being adjusted are corresponding with ultra-short term dc power curve
The deviation delta P ' of wind electricity digestion capabilityw_real_plan=4953.6MW, and Δ P 'w_real_planReceiving end power grid AGC unit is sent in direct current
Regulating power within the scope of, that is, meet following condition:
-Pw_emergency_T_up< Δ P 'w_real_plan< Pw_emergency_T_down
Step 5: adjusting dc power in real time.
Following several sides can be selected using different dc power adjustable strategies respectively by investigating dc power adjustable strategies
Method is realized.
Method 1: strategy is preferentially adjusted by direct current sending end power grid
Judge Δ P 'w_real_plan> 0, then direct current sending end power grid regulated quantity are as follows:
ΔPs_w_AGC_down=-min (max (Pw-PD_min,0),ΔP′w_real_plan,Ps_w_AGC_down)
=-min (max (4816-800,0), min (4953.6,4000)) MW=-4000MW
ΔP′w_real_plan=Δ P 'w_real_plan+ΔPs_w_AGC_down=4953.6MW-4000MW=953.6MW
Direct current receiving end regulated quantity are as follows:
ΔPr_w_AGC_down=-min (Δ P 'w_real_Dforecast,max(PDN-PD,0),Pr_w_AGC_down)
=-min (953.6, max (8000-5023,0), 5000)=- 953.6MW
Direct current adjustment amount are as follows:
ΔPD=-Δ Pr_w_AGC_down=953.6MW
Method 2: send receiving end mains frequency deviation real-time adjustable strategies by direct current
Direct current real-time monitoring is sent, the frequency of receiving end power grid is adjusted according to sending the frequency departure of receiving end power grid to adjust dc power
Whole amount is
Method 3: receiving end power grid AGC unit regulating power adjustable strategies are sent by direct current
Direct current is by the strategy adjustment dc power for sending receiving end power grid AGC pondage proportional allocations, adjustment amount
Method 4: consider tap switch maximal regulated capacity adjusting strategy
Calculating when by different adjustable strategies and considering tap switch adjustment capability is close with above-mentioned calculation method 1,2,3,
Concrete outcome is shown in attached drawing 7,8,9.
Finally it should be noted that: above embodiments are merely to illustrate the technical solution of the application rather than to its protection scopes
Limitation, although the application is described in detail referring to above-described embodiment, institute those skilled in the art read the application
Afterwards still can to the specific embodiment of application carry out it is various change, modification perhaps equivalent replacement but these change, modification or
Equivalent replacement is being applied within pending claims.
Claims (13)
1. the method for real-time adjustment that a kind of dc power follows wind power to fluctuate, it is characterised in that: the method includes following
Step:
I, the spare startup threshold values of wind power positive rotation and the negative spinning reserve startup threshold values of wind power are determined；
In step I, under different dc power adjustable strategies, the spare startup threshold values of the wind power positive rotation and wind-powered electricity generation are determined
The negative spinning reserve startup threshold values of power；
According to preferentially adjust strategy by direct current sending end power grid, send by direct current the real-time adjustable strategies of receiving end mains frequency deviation or by
Direct current send receiving end power grid AGC unit regulating power adjustable strategies, and (1), (2) determine that the wind power positive rotation is spare as the following formula
Startup threshold values and the negative spinning reserve startup threshold values of the wind power:
Pw_emergency_T_up=Ps_AGC_up+min(max(PD-PD_min,0),Pr_AGC_up) (1)
Pw_emergency_T_down=Ps_AGC_down+min(max((PDN-PD),0),Pr_AGC_down) (2)
According to tap switch maximal regulated capacity adjusting strategy is considered, then (3), (4) are determining wind power just respectively as the following formula
Spinning reserve startup threshold values and the negative spinning reserve startup threshold values of wind power:
Pw_emergency_T_up=Ps_AGC_up+min(max(PD-PD_min,0),Pr_AGC_up,PD_λlimit_down) (3)
Pw_emergency_T_down=Ps_AGC_down+min(max((PDN-PD),0),Pr_AGC_down,PD_λlimit_up) (4)
In above formula (1)-(4), Ps_AGC_upFor direct current sending end power grid AGC unit positive regulator ability, Pr_AGC_upFor direct current receiving end power grid
AGC unit positive regulator ability, Ps_AGC_downFor direct current sending end power grid AGC unit down regulation capacity, Pr_AGC_downFor direct current receiving end electricity
Net AGC unit down regulation capacity, PDFor the dc power value of dc power curve arrangement, PDNFor direct current rated power,
PD_λlimit_upAbility, P are adjusted up for direct current tap switchD_λlimit_downDownward regulating power, P are switched for direct current tapD_min
For direct current minimum delivery power, PD_min=0.1*PDN, PDNFor direct current rated power；
II, the wind power value deviation delta P for determining wind power real-time measurement values and being included in generation schedulew_real_plan, and give
The initial value of wind power value deviation adjusted；
Step II include: as the following formula (5) determine the wind power real-time measurement values and the wind power value for being included in generation schedule
Deviation: Δ Pw_real_plan=Pw-Pw_plan (5)
In formula, PwFor wind power real-time measurement values, Pw_planFor the wind power value for being included in generation schedule；
The initial value for giving the wind power value deviation adjusted first is to calculate the determining wind power value deviation,
That is: the initial value Δ P ' of wind power value deviation adjusted is givenw_real_plan=Δ Pw_real_plan；
III, judge whether the initial value of the wind power value deviation adjusted is out-of-limit, it is not out-of-limit, IV is entered step, it is out-of-limit
The urgent spinning reserve unit of wind-powered electricity generation is then adjusted, and updates the wind power value deviation adjusted；
Step III, for judge wind power real-time measurement values and be included in generation schedule wind power value deviation it is whether excessive,
The starting urgent spinning reserve unit of wind-powered electricity generation is needed to be adjusted if excessive；Step III realize by specified direct current sending end power grid,
Promptly positive and negative spinning reserve unit copes with being widely varied for wind power to receiving end power grid wind；
It is specific as follows:
The step III includes: the spare startup threshold values P of wind power positive rotation described in comparisonw_emergency_T_up, the wind-powered electricity generation function
The negative spinning reserve startup threshold values P of ratew_emergency_T_downWith the initial value Δ P of the wind power value deviationw_real_plan:
1. if-Pw_emergency_T_up< Δ Pw_real_plan< Pw_emergency_T_down, then IV is entered step；
If 2., Δ Pw_real_plan> Pw_emergency_T_down, then (6) determine that the urgent negative rotation of direct current sending end power grid wind turns as the following formula
Spare unit pondage:
ΔPs_w_emergency_reserve_down=-min (Δ Pw_real_plan-Pw_emergency_T_down,Ps_w_emergency_reserve_down) (6)
(7) determine direct current sending end power grid wind power value deviation adjusted as the following formula:
ΔP′w_real_plan=Δ P 'w_real_plan+ΔPs_w_emergency_reserve_down (7)
(8) determine that the urgent negative rotation of direct current receiving end power grid wind turns spare unit pondage as the following formula:
ΔPr_w_emergency_reserve_down=-min (Δ P 'w_real_plan-Pw_emergency_T_down,
max(PDN-PD,0),Pr_w_emergency_reserve_down) (8)
(9) determine direct current receiving end power grid wind power value deviation adjusted as the following formula:
ΔP′w_real_plan=Δ P 'w_real_plan+ΔPr_w_emergency_reserve_down (9)
(10) determine direct current adjustment amount Δ P as the following formulaD:
ΔPD=-Δ Pr_w_emergency_reserve_down (10)
Adjust dc power value PD_new=PD+ΔPD；
If 3., Δ Pw_real_plan<-Pw_emergency_T_up, then (11) determine the urgent positive rotation of direct current sending end power grid wind as the following formula
Spare unit pondage:
ΔPs_w_emergency_reserve_up=min (- Δ Pw_real_plan-Pw_emergency_T_up,Ps_w_emergency_reserve_up) (11)
(12) determine direct current sending end power grid wind power value deviation adjusted as the following formula:
ΔP′w_real_plan=Δ Pw′_real_plan+ΔPs_w_emergency_reserve_up (12)
(13) determine the spare unit pondage of the urgent positive rotation of direct current receiving end power grid wind as the following formula:
ΔPr_w_emergency_reserve_up=min (- Δ P 'w_real_plan-Pw_emergency_T_up,
max(PD-PD_min,0),Pr_w_emergency_reserve_up) (13)
(14) determine direct current receiving end power grid wind power value deviation adjusted as the following formula:
ΔP′w_real_plan=Δ P 'w_real_plan+ΔPr_w_emergency_reserve_up (14)
(15) determine direct current adjustment amount Δ P as the following formulaD:
ΔPD=-Δ Pr_w_emergency_reserve_up (15)
Adjust dc power value PD_new=PD+ΔPD；
In formula, Δ Pw_real_planFor wind power real-time measurement values and it is included in the wind power value deviation of generation schedule,
Pw_emergency_T_upFor the spare startup threshold values of wind power positive rotation, PD_minFor direct current minimum delivery power, PDFor dc power
The dc power value of curve arrangement, PDNFor direct current rated power；
Wind power value deviation delta P adjusted described in IV, comparisonw′_real_planWith the negative spinning reserve startup threshold values of wind power
Pw_emergency_T_down:
If Δ P 'w_real_plan> Pw_emergency_T_down, it is determined that abandonment amount Pw_abandoned, and update the wind-powered electricity generation adjusted
Performance number deviation delta P 'w_real_plan；Otherwise V is entered step；
V, dc power adjustable strategies are investigated, are adjusted in real time directly under the different dc power adjustable strategies using correlation method
Flow power.
2. the method as described in claim 1, it is characterised in that: in the step I, under different dc power adjustable strategies,
Determine the spare startup threshold values of the wind power positive rotation and the negative spinning reserve startup threshold values of wind power；
According to preferentially adjust strategy by direct current sending end power grid, send by direct current the real-time adjustable strategies of receiving end mains frequency deviation or by
Direct current send receiving end power grid AGC unit regulating power adjustable strategies, and (1), (2) determine that the wind power positive rotation is spare as the following formula
Startup threshold values and the negative spinning reserve startup threshold values of the wind power:
Pw_emergency_T_up=Ps_AGC_up+min(max(PD-PD_min,0),Pr_AGC_up) (1)
Pw_emergency_T_down=Ps_AGC_down+min(max((PDN-PD),0),Pr_AGC_down) (2)
According to tap switch maximal regulated capacity adjusting strategy is considered, then (3), (4) are determining wind power just respectively as the following formula
Spinning reserve startup threshold values and the negative spinning reserve startup threshold values of wind power:
Pw_emergency_T_up=Ps_AGC_up+min(max(PD-PD_min,0),Pr_AGC_up,PD_λlimit_down) (3)
Pw_emergency_T_down=Ps_AGC_down+min(max((PDN-PD),0),Pr_AGC_down,PD_λlimit_up) (4)
In above formula (1)-(4), Ps_AGC_upFor direct current sending end power grid AGC unit positive regulator ability, Pr_AGC_upFor direct current receiving end power grid
AGC unit positive regulator ability, Ps_AGC_downFor direct current sending end power grid AGC unit down regulation capacity, Pr_AGC_downFor direct current receiving end electricity
Net AGC unit down regulation capacity, PDFor the dc power value of dc power curve arrangement, PDNFor direct current rated power,
PD_λlimit_upAbility, P are adjusted up for direct current tap switchD_λlimit_downDownward regulating power, P are switched for direct current tapD_min
For direct current minimum delivery power, PD_min=0.1*PDN, PDNFor direct current rated power.
3. the method as described in claim 1, it is characterised in that: the step II include: as the following formula (5) determine the wind-powered electricity generation function
Rate real-time measurement values and the wind power value deviation for being included in generation schedule:
ΔPw_real_plan=Pw-Pw_plan (5)
In formula, PwFor wind power real-time measurement values, Pw_planFor the wind power value for being included in generation schedule；
Give the initial value Δ P ' of wind power value deviation adjustedw_real_planThe wind power value obtained for initial calculation
Deviation.
4. the method as described in claim 1, it is characterised in that: the step III includes: wind power positive rotation described in comparison
Spare startup threshold values Pw_emergency_T_up, the negative spinning reserve startup threshold values P of wind powerw_emergency_T_downWith the tune
The initial value Δ P of wind power value deviation after wholew_real_plan:
If-Pw_emergency_T_up< Δ Pw_real_plan< Pw_emergency_T_down, then IV is entered step；
If Δ Pw_real_plan> Pw_emergency_T_down, then (6) determine direct current sending end power grid wind promptly negative spinning reserve as the following formula
Unit pondage:
ΔPs_w_emergency_reserve_down=-min (Δ Pw_real_plan-Pw_emergency_T_down,Ps_w_emergency_reserve_down) (6)
(7) determine direct current sending end power grid wind power value deviation adjusted as the following formula:
ΔP′w_real_plan=Δ P 'w_real_plan+ΔPs_w_emergency_reserve_down (7)
(8) determine that the urgent negative rotation of direct current receiving end power grid wind turns spare unit pondage as the following formula:
ΔPr_w_emergency_reserve_down=-min (Δ P 'w_real_plan-Pw_emergency_T_down,
max(PDN-PD,0),Pr_w_emergency_reserve_down) (8)
(9) determine direct current receiving end power grid wind power value deviation adjusted as the following formula:
ΔP′w_real_plan=Δ P 'w_real_plan+ΔPr_w_emergency_reserve_down (9)
(10) determine direct current adjustment amount Δ P as the following formulaD:
ΔPD=-Δ Pr_w_emergency_reserve_down (10)
Adjust dc power value PD_new=PD+ΔPD；
If Δ Pw_real_plan<-Pw_emergency_T_up, then (11) determine that the urgent positive rotation of direct current sending end power grid wind is standby as the following formula
With unit pondage:
ΔPs_w_emergency_reserve_up=min (- Δ Pw_real_plan-Pw_emergency_T_up,Ps_w_emergency_reserve_up) (11)
(12) determine direct current sending end power grid wind power value deviation adjusted as the following formula:
ΔP′w_real_plan=Δ P 'w_real_plan+ΔPs_w_emergency_reserve_up (12)
(13) determine the spare unit pondage of the urgent positive rotation of direct current receiving end power grid wind as the following formula:
ΔPr_w_emergency_reserve_up=min (- Δ P 'w_real_plan-Pw_emergency_T_up,
max(PD-PD_min,0),Pr_w_emergency_reserve_up) (13)
(14) determine direct current receiving end power grid wind power value deviation adjusted as the following formula:
ΔP′w_real_plan=Δ P 'w_real_plan+ΔPr_w_emergency_reserve_up (14)
(15) determine direct current adjustment amount Δ P as the following formulaD:
ΔPD=-Δ Pr_w_emergency_reserve_up (15)
Adjust dc power value PD_new=PD+ΔPD；
In formula, Δ Pw_real_planFor wind power real-time measurement values and it is included in the wind power value deviation of generation schedule,
Pw_emergency_T_upFor the spare startup threshold values of wind power positive rotation, PD_minFor direct current minimum delivery power, PDFor dc power
The dc power value of curve arrangement, PDNFor direct current rated power.
5. the method as described in claim 1, it is characterised in that: the step IV include: as the following formula (16) determine the abandonment
Measure Pw_abandoned
Pw_abandoned=Δ P 'w_real_plan-Pw_emergency_T_down (16)
(17) determine wind power value deviation delta P ' adjusted as the following formulaw_real_plan, and the wind power value adjusted
Deviation send the regulating power range of receiving end power grid AGC unit in direct current；
ΔP′w_real_plan=Δ P 'w_real_plan-Pw_abandoned (17)
In formula, Pw_emergency_T_downFor the negative spinning reserve startup threshold values of wind power.
6. the method as described in claim 1, it is characterised in that: the dc power adjustable strategies include pressing direct current sending end power grid
It is preferential to adjust strategy, send the real-time adjustable strategies of receiving end mains frequency deviation by direct current, receiving end power grid AGC unit is sent to adjust by direct current
Capacity adjusting strategy and consideration tap switch maximal regulated capacity adjusting strategy.
7. method as claimed in claim 6, it is characterised in that: real when using strategy is preferentially adjusted by direct current sending end power grid
When adjust dc power the following steps are included:
Judge wind power real-time measurement values adjusted and the wind power value deviation delta P ' for being included in generation schedulew_real_planIt is
It is no to be greater than 0:
If Δ P 'w_real_plan> 0, it is determined that direct current sending end power grid AGC unit negative regulator amount are as follows:
ΔPs_w_AGC_down=-min (max (Pw-PD_min,0),ΔP′w_real_plan,Ps_w_AGC_down)
Update the wind power value deviation adjusted are as follows:
ΔP′w_real_plan=Δ P 'w_real_plan+ΔPs_w_AGC_down
Determine direct current receiving end power grid AGC unit negative regulator amount Pr_w_AGC_downAre as follows:
ΔPr_w_AGC_down=-min (Δ P 'w_real_plan,max(PDN-PD_new,0),Pr_w_AGC_down)
Determine direct current adjustment amount are as follows: Δ PD=-Δ Pr_w_AGC_down；
Update dc power are as follows: PD_new=PD_new+ΔPD
If Δ P 'w_real_plan< 0, it is determined that direct current sending end power grid AGC unit positive regulator amount are as follows:
ΔPs_w_AGC_up=min (- Δ P 'w_real_plan,Ps_w_AGC_up)
The wind power value deviation adjusted is updated again are as follows:
ΔP′w_real_plan=Δ P 'w_real_plan+ΔPs_w_AGC_up
Determine direct current receiving end power grid AGC unit positive regulator amount Ps_w_AGC_upAre as follows:
ΔPr_w_AGC_up=min (- Δ P 'w_real_plan,max(PD_new-PD_min,0),Pr_w_AGC_up)
Determine the direct current adjustment amount are as follows: Δ PD=-Δ Pr_w_AGC_up；
Update the dc power are as follows: PD_new=PD_new+ΔPD；
In formula, PwWind power real-time measurement values, PD_minDirect current minimum delivery power, Δ PDFor direct current adjustment amount.
8. method as claimed in claim 6, it is characterised in that: send receiving end mains frequency deviation real-time by direct current when use is described
When adjustable strategies, in real time adjust dc power the following steps are included:
The frequency of real-time monitoring sending end power grid and receiving end power grid determines direct current adjustment amount:
Dc power is adjusted according to the frequency departure of the sending end power grid and receiving end power grid:
PD_new=PD_new+ΔPD
In formula, PD_minFor direct current minimum delivery power, PD_newFor dc power adjusted, PDNFor direct current rated power, βsFor
Direct current sending end power grid combination frequency response characteristic coefficient, βrFor direct current receiving end power grid combination frequency response characteristic coefficient, fsFor direct current
Sending end mains frequency measured value, frFor direct current receiving end mains frequency measured value.
9. method as claimed in claim 6, it is characterised in that: send receiving end power grid AGC unit to adjust by direct current when use is described
When capacity adjusting strategy, in real time adjust dc power the following steps are included:
Determine direct current adjustment amount are as follows:
Dc power is adjusted as the following formula:
PD_new=PD_new+ΔPD
In formula, PD_minFor direct current minimum delivery power, PD_newFor dc power adjusted, PDNFor direct current rated power, Δ
P′w_real_planFor wind power real-time measurement values adjusted and it is included in the wind power value deviation of generation schedule；ΔPr_AGCFor
Direct current receiving end power grid AGC unit regulating power, Δ Ps_AGCFor direct current sending end power grid AGC unit regulating power.
10. method as claimed in claim 6, it is characterised in that: the consideration tap switch maximal regulated capacity adjusting strategy
Include: increase direct current tap switch be adjusted up ability and downward regulating power limitation preferentially adjust plan by direct current sending end power grid
Slightly, the real-time adjustable strategies of receiving end mains frequency deviation are sent by direct current and send receiving end power grid AGC unit regulating power to adjust by direct current
Strategy.
11. method as claimed in claim 10, it is characterised in that: be adjusted up energy when switching using the increase direct current tap
Power and when preferentially adjusting strategy by direct current sending end power grid of downward regulating power limitation, adjusting dc power in real time includes following step
It is rapid:
If judging Δ P 'w_real_plan> 0, it is determined that direct current sending end power grid AGC unit negative regulator amount Ps_w_AGC_downAre as follows:
ΔPs_w_AGC_down=-min (max (Pw-PD_min,0),ΔP′w_real_plan,Ps_w_AGC_down)
Update the wind power value deviation are as follows:
ΔP′w_real_plan=Δ P 'w_real_plan+ΔPs_w_AGC_down
Determine direct current receiving end power grid AGC unit negative regulator amount Δ Pr_w_AGC_downAre as follows:
ΔPr_w_AGC_down=-min (Δ P 'w_real_plan,max(PDN-PD_new,0),Pr_w_AGC_down,PD_λlimit_up)
Determine direct current adjustment amount are as follows:
ΔPD=-Δ Pr_w_AGC_down
Adjust dc power are as follows: PD_new=PD_new+ΔPD
If judging Δ P 'w_real_plan< 0, it is determined that direct current sending end power grid AGC unit positive regulator amount Ps_w_AGC_upAre as follows:
ΔPs_w_AGC_up=min (- Δ P 'w_real_plan,Ps_w_AGC_up)
Update the wind power value deviation are as follows:
ΔP′w_real_plan=Δ P 'w_real_plan+ΔPs_w_AGC_up
Determine direct current receiving end power grid AGC unit positive regulator amount Δ Pr_w_AGC_upAre as follows:
ΔPr_w_AGC_up=min (- Δ P 'w_real_plan,max(PD_new-PD_min,0),Pr_w_AGC_up,PD_λlimit_down)
Direct current adjustment amount are as follows:
ΔPD=-Δ Pr_w_AGC_up
Adjust the dc power are as follows: PD_new=PD_new+ΔPD
In formula, PwWind power real-time measurement values, PD_minDirect current minimum delivery power, Δ PDFor direct current adjustment amount.
12. method as claimed in claim 10, it is characterised in that: be adjusted up energy when switching using the increase direct current tap
Power and when sending the real-time adjustable strategies of receiving end mains frequency deviation by direct current of downward regulating power limitation, adjust dc power in real time
The following steps are included:
The frequency of real-time monitoring sending end power grid and receiving end power grid determines direct current adjustment amount:
Dc power is adjusted according to the frequency departure of the sending end power grid and receiving end power grid:
PD_new=PD_new+ΔPD
In formula, PD_λlimit_upAbility, P are adjusted up for direct current tap switchD_λlimit_downIt switchs for direct current tap and adjusts downwards
Ability, in formula, PD_minFor direct current minimum delivery power, PD_newFor dc power adjusted, PDNFor direct current rated power, βs
For direct current sending end power grid combination frequency response characteristic coefficient, βrFor direct current receiving end power grid combination frequency response characteristic coefficient, fsIt is straight
Stream end mains frequency measured value, frFor direct current receiving end mains frequency measured value.
13. method as claimed in claim 10, it is characterised in that: be adjusted up energy when switching using the increase direct current tap
Power and when sending receiving end power grid AGC unit regulating power adjustable strategies by direct current of downward regulating power limitation, adjust direct current in real time
Power the following steps are included:
Determine direct current adjustment amount are as follows:
Dc power is adjusted as the following formula:
PD_new=PD_new+ΔPD
In formula, PD_λlimit_upAbility, P are adjusted up for direct current tap switchD_λlimit_downIt switchs for direct current tap and adjusts downwards
Ability, PD_minFor direct current minimum delivery power, PD_newFor dc power adjusted, PDNFor direct current rated power, Δ Pr_AGCFor
Direct current receiving end power grid AGC unit regulating power, Δ Ps_AGCFor direct current sending end power grid AGC unit regulating power, Δ P 'w_real_plan
For wind power real-time measurement values adjusted and it is included in the wind power value deviation of generation schedule.
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| CN203071587U (en) * | 2012-12-31 | 2013-07-17 | 南方电网科学研究院有限责任公司 | Multi-end flexible direct current transmission system |
| CN103219722A (en) * | 2013-03-18 | 2013-07-24 | 国家电网公司 | Method for improving failure recovery characteristics of large-scale wind electricity through direct current outgoing system |
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| US20140146582A1 (en) * | 2012-11-29 | 2014-05-29 | General Electric Company | High voltage direct current (hvdc) converter system and method of operating the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203071587U (en) * | 2012-12-31 | 2013-07-17 | 南方电网科学研究院有限责任公司 | Multi-end flexible direct current transmission system |
| CN103219722A (en) * | 2013-03-18 | 2013-07-24 | 国家电网公司 | Method for improving failure recovery characteristics of large-scale wind electricity through direct current outgoing system |
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