CN105429186A - Active power distribution method for centralized control terminal of photovoltaic power station according to high electrovalence priority - Google Patents
Active power distribution method for centralized control terminal of photovoltaic power station according to high electrovalence priority Download PDFInfo
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- CN105429186A CN105429186A CN201510934585.9A CN201510934585A CN105429186A CN 105429186 A CN105429186 A CN 105429186A CN 201510934585 A CN201510934585 A CN 201510934585A CN 105429186 A CN105429186 A CN 105429186A
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- 239000000523 sample Substances 0.000 claims abstract description 34
- 238000004891 communication Methods 0.000 claims abstract description 22
- 238000010248 power generation Methods 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 230000005611 electricity Effects 0.000 claims description 177
- 230000007115 recruitment Effects 0.000 claims description 6
- 230000036642 wellbeing Effects 0.000 description 5
- 238000010348 incorporation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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Classifications
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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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- H02J3/383—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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Abstract
The invention discloses an active power distribution method for a centralized control terminal of a photovoltaic power station according to high electrovalence priority. The method comprises the steps as follows: firstly, an active power distribution module of the centralized control terminal and a probe timer are arranged and run on a prime mover at the centralized control terminal of the photovoltaic power station; the active power distribution module of the centralized control terminal distributes total active power of the centralized control terminal on the basis of a high-electrovalence power station priority distribution principle according to the collected dispatching total active instruction and actually issued values of active power of power stations, and generates an active power distribution result of distributing the total active power of the centralized control terminal to the power stations in real time by a method of combining detection and distribution according to the margin; and finally, the active power distribution module of the centralized control terminal issues the active power distribution result to front-end processor AGC modules of the power stations for execution through a communication module on the prime mover. Maximization of total power generation benefits of different electrovalences of different power stations under the centralized control terminal of the photovoltaic power station is achieved; the power generation requirements of the power station with high electrovalence are met in priority; and the economic benefits are greatly improved.
Description
Technical field
The present invention relates to a kind of active power distribution method, particularly relate to a kind of photovoltaic plant collection control end active power distribution method preferential by high electricity price, belong to active power controller technical field.
Background technology
Due to the policy reasons of new forms of energy rate for incorporation into the power network, plant stand belonging to the control of photovoltaic collection because of build period different or geographical position different (such as different resource district) cause each plant stand rate for incorporation into the power network difference larger.
And current scheduling only issues total active power to collection control end and regulates, then carry out secondary distribution by collection control end active power distribution module, and allocation result sent to each plant stand to perform allocation result by plant stand AGC power control algorithm module.
Current, the active power of photovoltaic plant collection control end is distributed main employing and is pressed power generation margin or press power prediction result as allocation strategy, and these allocation strategies do not consider electricity price factor, thus directly reduce the economic well-being of workers and staff of photovoltaic plant.
Summary of the invention
Main purpose of the present invention is, overcome deficiency of the prior art, a kind of photovoltaic plant collection control end active power distribution method preferential by high electricity price is provided, total gene-ration revenue of different for the different plant stands under photovoltaic plant collection control end electricity price is realized to maximize, preferentially meet the power generation needs of high electricity price plant stand, thus significantly improve economic well-being of workers and staff.
In order to achieve the above object, the technical solution adopted in the present invention is:
By the photovoltaic plant collection control end active power distribution method that high electricity price is preferential, comprise the following steps:
A) arrange in the telecontrol communication machine of photovoltaic plant collection control end and run collection control end active power distribution module and probe timer, wherein, telecontrol communication machine is used for the scheduling that issues of receiving scheduling center always meritorious instruction and the active power of each plant stand connected under gathering telecontrol communication machine is real sends out value, and probe timer is for timing tracking and detect the generating capacity of high electricity price plant stand;
B) collection control end active power distribution module is according to the real value of active power of the scheduling collected always meritorious instruction and each plant stand, distributing collecting the total active power of control end by high electricity price plant stand priority allocation principle, adopting to detect and distribute according to nargin the method generation combined and holding total active power to be assigned to the active power allocation result of each plant stand collection control in real time;
C) active power allocation result is issued to the front end processor AGC module of each plant stand by collection control end active power distribution module by the communication module in telecontrol communication machine, and performs active power allocation result by the front end processor AGC module of each plant stand.
The present invention is set to further, described step B) realize in accordance with the following methods, specifically comprise the following steps:
1) set and start probe timer; And set high electricity price plant stand and be numbered 0, other plant stands are numbered i, wherein 1≤i≤n, then plant stand total number is n+1; Be numbered other plant stands of i and be low electricity price plant stand;
Note integrates the total active power set point of control end as P
s, the scheduling that control centre issues is meritorious instruction P always
d, the current reality of high electricity price plant stand is sent out and is gained merit for P
0, high electricity price plant stand set point of gaining merit is P
0s, high electricity price plant stand send out higher limit P meritorious
0max, the meritorious probe value of high electricity price plant stand is P
t, the current reality of plant stand i is sent out and is gained merit for P
i, plant stand i set point of gaining merit is P
is, plant stand i sends out higher limit P meritorious
imax, plant stand i sends out lower limit P meritorious
imin;
Wherein, P
tsetting principle is: the current reality of high electricity price plant stand can be made to send out the meritorious minimum value producing effective Feedback, and the reality simultaneously produced sends out changing value meritorious in the fluctuation range that scheduling allows;
2) calculating current all plant stands always sends out meritorious in fact
Calculate current all plant stands and always can send out higher limit meritorious
Calculate plant stand i power generation margin P
im=P
imax-P
i;
Calculate the total power generation margin P of current all plant stands
am=P
amax-P
a;
Calculate the total power generation margin of current all low electricity price plant stands
Calculate high electricity price plant stand power generation margin P
0m=P
0max-P
0;
3) judge whether the telecontrol communication machine of photovoltaic plant collection control end receives the scheduling always meritorious instruction P that control centre issues
dif, receive, by the total active power set point P of collection control end
sbe set to the scheduling always meritorious instruction P of dispatching down distributing
dand perform step 4), if do not receive, judge that whether probe timer is overtime;
If probe timer is overtime, then reset probe timer, and arrange P
s=P
d', and perform step 4), wherein, P
d' the scheduling always meritorious instruction of vicinity dispatching down distributing once that receives for telecontrol communication machine;
If probe timer is not overtime, then return step 2);
4) by high electricity price plant stand priority allocation principle, the total active power of collection control end is distributed, is specially,
4-1) calculate meritorious increment Delta P=P
s-P
a;
If 4-2) meritorious increment Delta P > 0, then increase to collect to control and hold total real to gain merit, increase is exerted oneself, and performs step 4-3);
If meritorious increment Delta P≤0, then reduce to collect to control and hold total real to gain merit, reduction is exerted oneself, and is specially,
4-2-1) reducing the order of exerting oneself is, preferential reduce low electricity price plant stand real send out meritorious, if low electricity price plant stand always meritorious set point be reduced to low electricity price plant stand always can send out lower limit meritorious time still cannot meet the demands, then reduce high electricity price plant stand real send out meritorious;
The active power Δ P that current all low electricity price plant stands difference, i.e. low electricity price plant stand that always meritorious set point and low electricity price plant stand are always sent out meritorious in fact need to reduce is set
l=Δ P;
If 4-2-2) P
i-| Δ P
l| × P
im/ P
lam< P
imin, i>=1, set point of being gained merit by plant stand i is set to P
is=P
imin; If P
i-| Δ P
l| × P
im/ P
lam>=P
imin, i>=1, set point of being gained merit by plant stand i is set to P
is=P
i-| Δ P
l| × P
im/ P
lam;
4-2-3) according to step 4-2-2) gained P
is, calculate low electricity price plant stand always meritorious set point
If
show low electricity price plant stand always meritorious set point be reduced to always can sending out lower limit meritorious and still cannot meeting the demands of low electricity price plant stand, then reduce high electricity price plant stand and to gain merit set point, calculate high electricity price plant stand and to gain merit set point
otherwise high electricity price plant stand set point is set to P
0s=P
0+ P
t;
4-2-4) perform step 5);
If 4-3) Δ P × P
0m/ P
am< P
t, show that total real the meritorious recruitment of collection control end is assigned to the meritorious less than the meritorious probe value of high electricity price plant stand of high electricity price plant stand according to nargin, i.e. P
0+ Δ P × P
0m/ P
am< P
0+ P
t, now proceed generating capacity detection to high electricity price plant stand and distribute according to detection, set point of high electricity price plant stand being gained merit is set to P
0s=P
0+ P
t;
Otherwise, i.e. Δ P × P
0m/ P
am>=P
t, show that the meritorious meritorious probe value than high electricity price plant stand that total real the meritorious recruitment of collection control end is assigned to high electricity price plant stand according to nargin is large, i.e. P
0+ Δ P × P
0m/ P
am>=P
0+ P
t, now distribute according to nargin high electricity price plant stand, set point of high electricity price plant stand being gained merit is set to P
0s=P
0+ Δ P × P
0m/ P
am;
4-4) according to step 4-3) determine that high electricity price plant stand is gained merit set point P
0safter, calculate all low electricity price plant stand always meritorious set point P except high electricity price plant stand
als=P
s-P
0s; Always meritorious set point and all low electricity price plant stands always send out difference DELTA P in fact meritorious to calculate current all low electricity price plant stands again
l=P
als-P
al, wherein, all low electricity price plant stands are always sent out meritorious in fact
If Δ P
l< 0, then ration the power supply to low electricity price plant stand, minimizing is exerted oneself, and performs step 4-5);
If Δ P
l>=0, then carry out increasing electricity to low electricity price plant stand, increase is exerted oneself, and set point of being gained merit by plant stand i is set to P
is=P
i+ | Δ P
l| × P
im/ P
lam, i>=1; And perform step 5);
4-5) reducing the order of exerting oneself is, preferentially reduces low electricity price plant stand and gains merit, when low electricity price plant stand always meritorious set point be reduced to low electricity price plant stand always can send out lower limit meritorious time, then select to reduce high electricity price plant stand and gain merit, be specially,
4-5-1) detect high electricity price plant stand generating capacity by probe timer, set point of high electricity price plant stand being gained merit is set to P
0s=P
0+ P
t;
If 4-5-2) P
i-| Δ P
l| × P
im/ P
lam< P
imin, i>=1, set point of being gained merit by plant stand i is set to P
is=P
imin, make low electricity price plant stand i be reduced to the minimum load sending out lower limit meritorious and keep plant stand i of plant stand i; When low electricity price plant stand always meritorious set point be reduced to low electricity price plant stand always can send out lower limit meritorious time reduce high electricity price plant stand again and gain merit; Set point of high electricity price plant stand being gained merit is re-set as
If P
i-| Δ P
l| × P
im/ P
lam>=P
imin, i>=1, set point of being gained merit by plant stand i is set to P
is=P
i-| Δ P
l| × P
im/ P
lam;
5) according to step 4) the high electricity price plant stand that obtains gains merit set point P
0sto gain merit set point P with plant stand i
is, i>=1, generates the active power the allocation result in real time total active power of collection control end being assigned to each plant stand.
Compared with prior art, the beneficial effect that the present invention has is:
Take into full account that each plant stand exists the different actual conditions different with generating capacity of electricity price, adopt generating capacity detection and distribute the method matched by nargin, complete and the tracking of active power and the detection to high electricity price plant stand generating capacity are sent out to the current reality of all plant stands, total active power of dispatching down distributing is distributed; Give high electricity price plant stand by active power priority allocation, thus meet the power generation needs of high electricity price plant stand, realize the significantly raising of economic well-being of workers and staff.When scheduling is not rationed the power supply, distribute by nargin; When scheduling is rationed the power supply, by detecting and distributing according to the mode that nargin combines, farthest realize the maximum economic well-being of workers and staff of photovoltaic collection control.
Foregoing is only the general introduction of technical solution of the present invention, and in order to clearer understanding technological means of the present invention, below in conjunction with accompanying drawing, the invention will be further described.
Accompanying drawing explanation
Fig. 1 is photovoltaic power station system network structure of the present invention;
Fig. 2 is that photovoltaic plant active power of the present invention distributes framework map;
Fig. 3 is the active power allocation flow figure of collection control end active power distribution module of the present invention.
Embodiment
Below in conjunction with Figure of description, the present invention is further illustrated.
The invention provides a kind of photovoltaic plant collection control end active power distribution method preferential by high electricity price, comprise the following steps:
A) arrange in the telecontrol communication machine 1 of photovoltaic plant collection control end and run collection control end active power distribution module and probe timer, wherein, the scheduling that telecontrol communication machine 1 issues for receiving scheduling center 2 always meritorious instruction also gathers that the active power of each plant stand 3 of telecontrol communication machine 1 time company is real sends out value, and probe timer is for timing tracking and detect the generating capacity of high electricity price plant stand 30; As depicted in figs. 1 and 2.
B) collection control end active power distribution module is according to the real value of active power of the scheduling collected always meritorious instruction and each plant stand, distributing collecting the total active power of control end by high electricity price plant stand priority allocation principle, adopting to detect and distribute according to nargin the method generation combined and holding total active power to be assigned to the active power allocation result of each plant stand collection control in real time.
C) active power allocation result is issued to the front end processor AGC module of each plant stand 3 by collection control end active power distribution module by the communication module in telecontrol communication machine 1, and performs active power allocation result by the front end processor AGC module of each plant stand 3.
As shown in Figure 3, step B) realize in accordance with the following methods, specifically comprise the following steps:
1) set and start probe timer; And set high electricity price plant stand and be numbered 0, other plant stands are numbered i, wherein 1≤i≤n, then plant stand total number is n+1; Be numbered other plant stands of i and be low electricity price plant stand;
Note integrates the total active power set point of control end as P
s, the scheduling that control centre issues is meritorious instruction P always
d, the current reality of high electricity price plant stand is sent out and is gained merit for P
0, high electricity price plant stand set point of gaining merit is P
0s, high electricity price plant stand send out higher limit P meritorious
0max, the meritorious probe value of high electricity price plant stand is P
t, the current reality of plant stand i is sent out and is gained merit for P
i, plant stand i set point of gaining merit is P
is, plant stand i sends out higher limit P meritorious
imax, plant stand i sends out lower limit P meritorious
imin;
Wherein, P
tsetting principle is: the current reality of high electricity price plant stand can be made to send out the meritorious minimum value producing effective Feedback, and the reality simultaneously produced sends out changing value meritorious in the fluctuation range that scheduling allows.
2) calculating current all plant stands always sends out meritorious in fact
Calculate current all plant stands and always can send out higher limit meritorious
Calculate plant stand i power generation margin P
im=P
imax-P
i;
Calculate the total power generation margin P of current all plant stands
am=P
amax-P
a;
Calculate the total power generation margin of current all low electricity price plant stands
Calculate high electricity price plant stand power generation margin P
0m=P
0max-P
0.
3) judge whether the telecontrol communication machine of photovoltaic plant collection control end receives the scheduling always meritorious instruction P that control centre issues
dif, receive, by the total active power set point P of collection control end
sbe set to the scheduling always meritorious instruction P of dispatching down distributing
dand perform step 4), if do not receive, judge that whether probe timer is overtime;
If probe timer is overtime, then reset probe timer, and arrange P
s=P
d', and perform step 4), wherein, P
d' the scheduling always meritorious instruction of vicinity dispatching down distributing once that receives for telecontrol communication machine;
If probe timer is not overtime, then return step 2).
4) by high electricity price plant stand priority allocation principle, the total active power of collection control end is distributed, is specially,
4-1) calculate meritorious increment Delta P=P
s-P
a;
If 4-2) meritorious increment Delta P > 0, then increase to collect to control and hold total real to gain merit, increase is exerted oneself, and performs step 4-3);
If meritorious increment Delta P≤0, then reduce to collect to control and hold total real to gain merit, reduction is exerted oneself, and is specially,
4-2-1) reducing the order of exerting oneself is, preferential reduce low electricity price plant stand real send out meritorious, if low electricity price plant stand always meritorious set point be reduced to low electricity price plant stand always can send out lower limit meritorious time still cannot meet the demands, then reduce high electricity price plant stand real send out meritorious;
The active power Δ P that current all low electricity price plant stands difference, i.e. low electricity price plant stand that always meritorious set point and low electricity price plant stand are always sent out meritorious in fact need to reduce is set
l=Δ P;
If 4-2-2) P
i-| Δ P
l| × P
im/ P
lam< P
imin, i>=1, set point of being gained merit by plant stand i is set to P
is=P
imin; If P
i-| Δ P
l| × P
im/ P
lam>=P
imin, i>=1, set point of being gained merit by plant stand i is set to P
is=P
i-| Δ P
l| × P
im/ P
lam;
4-2-3) according to step 4-2-2) gained P
is, calculate low electricity price plant stand always meritorious set point
If
show low electricity price plant stand always meritorious set point be reduced to always can sending out lower limit meritorious and still cannot meeting the demands of low electricity price plant stand, then reduce high electricity price plant stand and to gain merit set point, calculate high electricity price plant stand and to gain merit set point
otherwise high electricity price plant stand set point is set to P
0s=P
0+ P
t;
4-2-4) perform step 5);
If 4-3) Δ P × P
0m/ P
am< P
t, show that total real the meritorious recruitment of collection control end is assigned to the meritorious less than the meritorious probe value of high electricity price plant stand of high electricity price plant stand according to nargin, i.e. P
0+ Δ P × P
0m/ P
am< P
0+ P
t, now proceed generating capacity detection to high electricity price plant stand and distribute according to detection, set point of high electricity price plant stand being gained merit is set to P
0s=P
0+ P
t;
Otherwise, i.e. Δ P × P
0m/ P
am>=P
t, show that the meritorious meritorious probe value than high electricity price plant stand that total real the meritorious recruitment of collection control end is assigned to high electricity price plant stand according to nargin is large, i.e. P
0+ Δ P × P
0m/ P
am>=P
0+ P
t, now distribute according to nargin high electricity price plant stand, set point of high electricity price plant stand being gained merit is set to P
0s=P
0+ Δ P × P
0m/ P
am;
4-4) according to step 4-3) determine that high electricity price plant stand is gained merit set point P
0safter, calculate all low electricity price plant stand always meritorious set point P except high electricity price plant stand
als=P
s-P
0s; Always meritorious set point and all low electricity price plant stands always send out difference DELTA P in fact meritorious to calculate current all low electricity price plant stands again
l=P
als-P
al, wherein, all low electricity price plant stands are always sent out meritorious in fact
If Δ P
l< 0, then ration the power supply to low electricity price plant stand, minimizing is exerted oneself, and performs step 4-5);
If Δ P
l>=0, then carry out increasing electricity to low electricity price plant stand, increase is exerted oneself, and set point of being gained merit by plant stand i is set to P
is=P
i+ | Δ P
l| × P
im/ P
lam, i>=1; And perform step 5);
4-5) reducing the order of exerting oneself is, preferentially reduces low electricity price plant stand and gains merit, when low electricity price plant stand always meritorious set point be reduced to low electricity price plant stand always can send out lower limit meritorious time, then select to reduce high electricity price plant stand and gain merit, be specially,
4-5-1) detect high electricity price plant stand generating capacity by probe timer, set point of high electricity price plant stand being gained merit is set to P
0s=P
0+ P
t;
If 4-5-2) P
i-| Δ P
l| × P
im/ P
lam< P
imin, i>=1, set point of being gained merit by plant stand i is set to P
is=P
imin, make low electricity price plant stand i be reduced to the minimum load sending out lower limit meritorious and keep plant stand i of plant stand i; When low electricity price plant stand always meritorious set point be reduced to low electricity price plant stand always can send out lower limit meritorious time reduce high electricity price plant stand again and gain merit; Set point of high electricity price plant stand being gained merit is re-set as
if P
i-| Δ P
l| × P
im/ P
lam>=P
imin, i>=1, set point of being gained merit by plant stand i is set to P
is=P
i-| Δ P
l| × P
im/ P
lam.
5) according to step 4) the high electricity price plant stand that obtains gains merit set point P
0sto gain merit set point P with plant stand i
is, i>=1, generates the active power the allocation result in real time total active power of collection control end being assigned to each plant stand.
Innovative point of the present invention is, completes and sends out the tracking of active power and the detection to high electricity price plant stand generating capacity to the current reality of all plant stands, distribute total active power of dispatching down distributing; When scheduling is not rationed the power supply, distribute by nargin; When scheduling is rationed the power supply, by detecting and distributing according to the mode that nargin combines, farthest realize the maximum economic well-being of workers and staff of photovoltaic collection control.
More than show and describe general principle of the present invention, principal character and advantage.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection range is defined by appending claims and equivalent thereof.
Claims (2)
1., by the photovoltaic plant collection control end active power distribution method that high electricity price is preferential, it is characterized in that, comprise the following steps:
A) arrange in the telecontrol communication machine of photovoltaic plant collection control end and run collection control end active power distribution module and probe timer, wherein, telecontrol communication machine is used for the scheduling that issues of receiving scheduling center always meritorious instruction and the active power of each plant stand connected under gathering telecontrol communication machine is real sends out value, and probe timer is for timing tracking and detect the generating capacity of high electricity price plant stand;
B) collection control end active power distribution module is according to the real value of active power of the scheduling collected always meritorious instruction and each plant stand, distributing collecting the total active power of control end by high electricity price plant stand priority allocation principle, adopting to detect and distribute according to nargin the method generation combined and holding total active power to be assigned to the active power allocation result of each plant stand collection control in real time;
C) active power allocation result is issued to the front end processor AGC module of each plant stand by collection control end active power distribution module by the communication module in telecontrol communication machine, and performs active power allocation result by the front end processor AGC module of each plant stand.
2. a kind of photovoltaic plant collection control end active power distribution method preferential by high electricity price according to claim 1, is characterized in that, described step B) realize in accordance with the following methods, specifically comprise the following steps:
1) set and start probe timer; And set high electricity price plant stand and be numbered 0, other plant stands are numbered i, wherein 1≤i≤n, then plant stand total number is n+1; Be numbered other plant stands of i and be low electricity price plant stand;
Note integrates the total active power set point of control end as P
s, the scheduling that control centre issues is meritorious instruction P always
d, the current reality of high electricity price plant stand is sent out and is gained merit for P
0, high electricity price plant stand set point of gaining merit is P
0s, high electricity price plant stand send out higher limit P meritorious
0max, the meritorious probe value of high electricity price plant stand is P
t, the current reality of plant stand i is sent out and is gained merit for P
i, plant stand i set point of gaining merit is P
is, plant stand i sends out higher limit P meritorious
imax, plant stand i sends out lower limit P meritorious
imin;
Wherein, P
tsetting principle is: the current reality of high electricity price plant stand can be made to send out the meritorious minimum value producing effective Feedback, and the reality simultaneously produced sends out changing value meritorious in the fluctuation range that scheduling allows;
2) calculating current all plant stands always sends out meritorious in fact
Calculate current all plant stands and always can send out higher limit meritorious
Calculate plant stand i power generation margin P
im=P
imax-P
i;
Calculate the total power generation margin P of current all plant stands
am=P
amax-P
a;
Calculate the total power generation margin of current all low electricity price plant stands
Calculate high electricity price plant stand power generation margin P
0m=P
0max-P
0;
3) judge whether the telecontrol communication machine of photovoltaic plant collection control end receives the scheduling always meritorious instruction P that control centre issues
dif, receive, by the total active power set point P of collection control end
sbe set to the scheduling always meritorious instruction P of dispatching down distributing
dand perform step 4), if do not receive, judge that whether probe timer is overtime;
If probe timer is overtime, then reset probe timer, and arrange P
s=P
d', and perform step 4), wherein, P
d' the scheduling always meritorious instruction of vicinity dispatching down distributing once that receives for telecontrol communication machine;
If probe timer is not overtime, then return step 2);
4) by high electricity price plant stand priority allocation principle, the total active power of collection control end is distributed, is specially,
4-1) calculate meritorious increment Delta P=P
s-P
a;
If 4-2) meritorious increment Delta P > 0, then increase to collect to control and hold total real to gain merit, increase is exerted oneself, and performs step 4-3);
If meritorious increment Delta P≤0, then reduce to collect to control and hold total real to gain merit, reduction is exerted oneself, and is specially,
4-2-1) reducing the order of exerting oneself is, preferential reduce low electricity price plant stand real send out meritorious, if low electricity price plant stand always meritorious set point be reduced to low electricity price plant stand always can send out lower limit meritorious time still cannot meet the demands, then reduce high electricity price plant stand real send out meritorious;
The active power Δ P that current all low electricity price plant stands difference, i.e. low electricity price plant stand that always meritorious set point and low electricity price plant stand are always sent out meritorious in fact need to reduce is set
l=Δ P;
If 4-2-2) P
i-| Δ P
l| × P
im/ P
lam< P
imin, i>=1, set point of being gained merit by plant stand i is set to P
is=P
imin; If P
i-| Δ P
l| × P
im/ P
lam>=P
imin, i>=1, set point of being gained merit by plant stand i is set to P
is=P
i-| Δ P
l| × P
im/ P
lam;
4-2-3) according to step 4-2-2) gained P
is, calculate low electricity price plant stand always meritorious set point
If
show low electricity price plant stand always meritorious set point be reduced to always can sending out lower limit meritorious and still cannot meeting the demands of low electricity price plant stand, then reduce high electricity price plant stand and to gain merit set point, calculate high electricity price plant stand and to gain merit set point
otherwise high electricity price plant stand set point is set to P
0s=P
0+ P
t;
4-2-4) perform step 5);
If 4-3) Δ P × P
0m/ P
am< P
t, show that total real the meritorious recruitment of collection control end is assigned to the meritorious less than the meritorious probe value of high electricity price plant stand of high electricity price plant stand according to nargin, i.e. P
0+ Δ P × P
0m/ P
am< P
0+ P
t, now proceed generating capacity detection to high electricity price plant stand and distribute according to detection, set point of high electricity price plant stand being gained merit is set to P
0s=P
0+ P
t;
Otherwise, i.e. Δ P × P
0m/ P
am>=P
t, show that the meritorious meritorious probe value than high electricity price plant stand that total real the meritorious recruitment of collection control end is assigned to high electricity price plant stand according to nargin is large, i.e. P
0+ Δ P × P
0m/ P
am>=P
0+ P
t, now distribute according to nargin high electricity price plant stand, set point of high electricity price plant stand being gained merit is set to P
0s=P
0+ Δ P × P
0m/ P
am;
4-4) according to step 4-3) determine that high electricity price plant stand is gained merit set point P
0safter, calculate all low electricity price plant stand always meritorious set point P except high electricity price plant stand
als=P
s-P
0s; Always meritorious set point and all low electricity price plant stands always send out difference DELTA P in fact meritorious to calculate current all low electricity price plant stands again
l=P
als-P
al, wherein, all low electricity price plant stands are always sent out meritorious in fact
If Δ P
l< 0, then ration the power supply to low electricity price plant stand, minimizing is exerted oneself, and performs step 4-5);
If Δ P
l>=0, then carry out increasing electricity to low electricity price plant stand, increase is exerted oneself, and set point of being gained merit by plant stand i is set to P
is=P
i+ | Δ P
l| × P
im/ P
lam, i>=1; And perform step 5);
4-5) reducing the order of exerting oneself is, preferentially reduces low electricity price plant stand and gains merit, when low electricity price plant stand always meritorious set point be reduced to low electricity price plant stand always can send out lower limit meritorious time, then select to reduce high electricity price plant stand and gain merit, be specially,
4-5-1) detect high electricity price plant stand generating capacity by probe timer, set point of high electricity price plant stand being gained merit is set to P
0s=P
0+ P
t;
If 4-5-2) P
i-| Δ P
l| × P
im/ P
lam< P
imin, i>=1, set point of being gained merit by plant stand i is set to P
is=P
imin, make low electricity price plant stand i be reduced to the minimum load sending out lower limit meritorious and keep plant stand i of plant stand i; When low electricity price plant stand always meritorious set point be reduced to low electricity price plant stand always can send out lower limit meritorious time reduce high electricity price plant stand again and gain merit; Set point of high electricity price plant stand being gained merit is re-set as
If P
i-| Δ P
l| × P
im/ P
lam>=P
imin, i>=1, set point of being gained merit by plant stand i is set to P
is=P
i-| Δ P
l| × P
im/ P
lam;
5) according to step 4) the high electricity price plant stand that obtains gains merit set point P
0sto gain merit set point P with plant stand i
is, i>=1, generates the active power the allocation result in real time total active power of collection control end being assigned to each plant stand.
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