CN112491095A - New energy power station and power optimal distribution method thereof - Google Patents

New energy power station and power optimal distribution method thereof Download PDF

Info

Publication number
CN112491095A
CN112491095A CN202011309068.XA CN202011309068A CN112491095A CN 112491095 A CN112491095 A CN 112491095A CN 202011309068 A CN202011309068 A CN 202011309068A CN 112491095 A CN112491095 A CN 112491095A
Authority
CN
China
Prior art keywords
power
new energy
generation unit
target
power generation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202011309068.XA
Other languages
Chinese (zh)
Other versions
CN112491095B (en
Inventor
高强
江跃
崔炎坤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hefei Sungrow New Energy Technology Co Ltd
Original Assignee
Hefei Sungrow New Energy Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hefei Sungrow New Energy Technology Co Ltd filed Critical Hefei Sungrow New Energy Technology Co Ltd
Priority to CN202011309068.XA priority Critical patent/CN112491095B/en
Publication of CN112491095A publication Critical patent/CN112491095A/en
Application granted granted Critical
Publication of CN112491095B publication Critical patent/CN112491095B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—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
    • H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
    • 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
    • H02J3/381—Dispersed generators
    • 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
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • 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
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • 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

Abstract

The application discloses a new energy power station and a power optimization distribution method of the new energy power station, and aims to achieve the purpose that the actual power of the new energy power station in a power limiting state can reach the target power all the time or the actual power can approach the target power to the maximum extent. The method comprises the following steps: when the new energy power station is in the power limiting state, if the actual power P of the new energy power stationsum＜PtargetDelta, performing power distribution of the new energy power station by adopting an equal margin distribution strategy; if Psum> target Power Ptarget+ δ, then: executing an equal proportion distribution strategy to obtain the current actual power P of the new energy power stationsum', if | Psum'‑PtargetIf the power distribution value is greater than S, searching the power generation unit with the difference value between the power distribution value and the actual power less than or equal to K, and increasing the control proportion of the power generation unit meeting the requirement until Psum'‑PtargetAnd quitting the control when | ≦ S or no power generation unit meeting the requirement exists.

Description

New energy power station and power optimal distribution method thereof
Technical Field
The invention relates to the technical field of new energy power generation, in particular to a new energy power station and a power optimization distribution method of the new energy power station.
Background
In order to implement power scheduling of a new energy power station (e.g., a photovoltaic power station), it is necessary to distribute target power of the new energy power station to each power generation unit (a power generation unit refers to a controllable output unit formed by combining one or more power generation units) according to a certain strategy, and enable each power generation unit to independently perform power tracking.
At present, two most commonly used allocation strategies are an equal margin allocation strategy and an equal proportion allocation strategy. The equal margin distribution strategy requires that the ith power generation unit is distributed according to the power distribution value
Figure BDA0002789201710000011
Carrying out power tracking and an equal proportion distribution strategy to require the ith power generation unit to distribute values according to power
Figure BDA0002789201710000012
Carrying out power tracking, wherein i is 1, 2, … and n, n is the total number of the power generation units, n is more than or equal to 2, PtargetIs the target power, P, of the new energy power stationsiIs the actual power of the ith power generation unit, PRated_iIs the rated power of the ith power generation unit.
However, the two allocation strategies have disadvantages, specifically: because the maximum output of the power generation unit cannot be determined under the equal-margin distribution strategy, when the new energy power station is in a power-limited state, the equal-margin distribution strategy can only track the power of the power generation unit downwards but cannot track the power of the power generation unit upwards (the downward tracking refers to the tracking in the direction of power reduction, and the upward tracking refers to the tracking in the direction of power increase). The equal proportion distribution strategy can lead the original power generation unit with strong power generation capacity to be limited to generate power and the original power generation unit with weak power generation capacity to generate power in a full proportion, thus leading the actual power of the new energy power station to be lower and possibly not reaching the target power Ptarget。
In summary, how to realize power optimal distribution of the new energy power station in the power limiting state enables the actual power of the new energy power station to reach or approach the target power P to the maximum extenttargetThe problem to be solved in the art is urgent.
Disclosure of Invention
In view of this, the present invention provides a new energy power station and a power optimal allocation method for the new energy power station, so as to achieve that the actual power of the new energy power station in the power-limited state can reach the target power all the time or approach the target power to the maximum extent.
A new energy power station power optimization distribution method comprises the following steps:
when the new energy power station is in a power limiting state, acquiring target power P of the new energy power stationtargetAnd the actual power P of the new energy power stationsumAnd Ptarget-δ、PtargetComparing the + delta, wherein delta is a preset value not less than zero;
if Psum＜PtargetDelta, performing power distribution of the new energy power station by adopting an equal margin distribution strategy;
if Psum＞Ptarget+ δ, then: carrying out power distribution on the new energy power station by adopting an equal proportion distribution strategy; acquiring actual power P of the new energy power station under the equal proportion distribution strategysum', determine whether | P is satisfiedsum'-PtargetS is not more than S, and S is a preset value not less than zero; if not, searching the power generation unit with the difference value between the power distribution value and the actual power less than or equal to K in the new energy power station, and then increasing the control proportion of the power generation unit meeting the requirement until | Psum'-PtargetStopping performing the determination whether | P is satisfied or not when | S ≦ or there is no power generation unit satisfying this requirementsum'-PtargetA step of | ≦ S; wherein K is a preset value not less than zero, and the control ratio of the power generation unit is the power distribution value/P of the power generation unittarget。
Optionally, increasing the control ratio of the power generation unit meeting the requirement includes: increase the control ratio of the power generation unit satisfying this requirement
Figure BDA0002789201710000021
PnmThe sum of the rated powers, P, of all the power generating units satisfying this requirementtotalsumIs the sum of said differences for all power generating units not meeting this requirement.
Optionally, the performing power distribution of the new energy power station by using an equal margin distribution strategy includes:
allocating power to values
Figure BDA0002789201710000022
Sending to the ith power generation unit, and independently tracking power according to the power distribution value received by each power generation unit, PsiThe actual power of the ith power generation unit; alternatively, the ratio will be controlled
Figure BDA0002789201710000023
Sending the power to the ith power generation unit, and independently tracking the power of each power generation unit according to the control proportion received by each power generation unit, PRated_iIs the rated power of the ith power generation unit.
Optionally, in any one of the above disclosed new energy power station power optimal distribution methods, the performing new energy power station power distribution by using an equal proportion distribution strategy includes:
allocating power to values
Figure BDA0002789201710000031
The power distribution value is sent to the ith power generation unit, and each power generation unit independently tracks power according to the power distribution value received by the power generation unit; alternatively, the ratio will be controlled
Figure BDA0002789201710000032
Sending the power to the ith power generation unit, and independently tracking the power of each power generation unit according to the control proportion received by each power generation unit, PRated_iIs the rated power of the ith power generation unit.
Optionally, any one of the disclosed power optimization distribution methods for the new energy power station further includes:
when the new energy power station is in an unlimited power state: if Psum＜PtargetDelta, outputting power by the new energy power station in a maximum power tracking mode; if Psum＞PtargetAnd + delta, performing power distribution of the new energy power station by adopting an equal margin distribution strategy.
Optionally, in any of the above-disclosed new energy power station power optimal distribution methods, δ is greater than 0, S is greater than 0, and K is greater than 0.
A new energy power station comprises a plurality of power generation units and a processor; the processor is used for running a program, and when the processor runs the program, the following steps are realized:
when the new energy power station is in a power limiting state, acquiring target power P of the new energy power stationtargetAnd the actual power P of the new energy power stationsumAnd Ptarget-δ、PtargetComparing the + delta, wherein delta is a preset value not less than zero;
if Psum＜PtargetDelta, performing power distribution of the new energy power station by adopting an equal margin distribution strategy;
if Psum＞Ptarget+ δ, then: carrying out power distribution on the new energy power station by adopting an equal proportion distribution strategy; acquiring actual power P of the new energy power station under the equal proportion distribution strategysum', determine whether | P is satisfiedsum'-PtargetS is not more than S, and S is a preset value not less than zero; if not, searching the power generation unit with the difference value between the power distribution value and the actual power less than or equal to K in the new energy power station, and then increasing the control proportion of the power generation unit meeting the requirement until | Psum'-PtargetStopping performing the determination whether | P is satisfied or not when | S ≦ or there is no power generation unit satisfying this requirementsum'-PtargetA step of | ≦ S; wherein K is a preset value not less than zero, and the control ratio of the power generation unit is the power distribution value/P of the power generation unittarget。
Optionally, increasing the control ratio of the power generation unit meeting the requirement includes: increase the control ratio of the power generation unit satisfying this requirement
Figure BDA0002789201710000033
PnmThe sum of the rated powers, P, of all the power generating units satisfying this requirementtotalsumIs the sum of said differences for all power generating units not meeting this requirement.
Optionally, in the new energy power station, the performing power distribution of the new energy power station by using an equal margin distribution strategy includes:
allocating power to values
Figure BDA0002789201710000041
Sending to the ith power generation unit, and independently tracking power according to the power distribution value received by each power generation unit, PsiThe actual power of the ith power generation unit; alternatively, the ratio will be controlled
Figure BDA0002789201710000042
Sending the power to the ith power generation unit, and independently tracking the power of each power generation unit according to the control proportion received by each power generation unit, PRated_iIs the rated power of the ith power generation unit.
Optionally, in any one of the new energy power stations disclosed above, the performing power distribution of the new energy power station by using an equal proportion distribution strategy includes:
allocating power to values
Figure BDA0002789201710000043
The power distribution value is sent to the ith power generation unit, and each power generation unit independently tracks power according to the power distribution value received by the power generation unit; alternatively, the ratio will be controlled
Figure BDA0002789201710000044
Sending the power to the ith power generation unit, and independently tracking the power of each power generation unit according to the control proportion received by each power generation unit, PRated_iIs the rated power of the ith power generation unit.
Optionally, in any one of the new energy power stations disclosed above, when the processor runs the program, the following steps are further implemented:
when the new energy power station is in an unlimited power state: if Psum＜PtargetDelta, outputting power by the new energy power station in a maximum power tracking mode; if Psum＞PtargetAnd + delta, performing power distribution of the new energy power station by adopting an equal margin distribution strategy.
Optionally, in any one of the new energy power stations disclosed above, δ > 0, S > 0, and K > 0.
According to the technical scheme, the power optimization distribution of the new energy power station in the power limiting state is realized by adopting two distribution strategies: adopting an equal margin distribution strategy when power needs to be tracked downwards; when the power needs to be tracked upwards, the power generation units with strong power generation capacity are enabled to generate more power on the basis of an equal proportion distribution strategy, so that the power generation amount which is deficient by the power generation units with weak power generation capacity is supplemented. Therefore, the actual power of the new energy power station in the power limiting state can reach the target power all the time or approach the target power to the maximum extent.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of a new energy power station power optimal allocation method disclosed in an embodiment of the present invention;
FIG. 2 is a switching diagram of the power limiting state/normal state of the new energy power station;
fig. 3 is a flowchart of another method for optimizing power distribution of a new energy power station according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a new energy power station disclosed in the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention discloses a new energy power station power optimal allocation method, including:
step S01: in a new energy power stationAcquiring target power P of the new energy power station in the power limiting statetarget。
Specifically, the new energy power station is divided into an electricity-limited state and an electricity-unlimited state (i.e., a normal state). The power limiting state refers to a state in which the new energy power station limits its output power under the control of a power limiting instruction issued by a power department or a power limiting signal generated by the new energy power station itself. The power limiting signal generated by the new energy power station itself is, for example, a power limiting signal generated by the new energy power station for realizing power optimal distribution. The normal state refers to a state in which the new energy power station outputs the maximum power. The power limit state/normal state switching diagram of the new energy power station is shown in fig. 2.
Step S02: will PsumAnd Ptarget-δ、Ptarget+ δ comparison size; if Psum＜Ptargetδ, go to step S03; if Psum＞Ptarget+ δ, step S04; if Ptarget-δ≤Psum≤PtargetAnd + δ, maintaining the allocation strategy at the previous time, and ending the control of the current round. Wherein, PsumDelta is a preset value which is not less than zero and is the actual power of the new energy power station.
Specifically, under the condition that the new energy power station is in the power limiting state: if Psum＜PtargetThe power generation unit needs to track down power to make PsumTends to PtargetAt the moment, the power optimization distribution of the new energy power station can be realized by adopting an equal margin distribution strategy; if Psum＞PtargetThe power generation unit needs to track power up to let PsumTends to PtargetAnd because the equal-margin distribution strategy does not have the capability of tracking power upwards in the power-limited state of the new energy power station, another distribution strategy needs to be used instead to realize the optimal power distribution of the new energy power station.
The description of the peer-to-peer margin allocation policy is specifically referred to the following step S03; the description of the other allocation strategy is specifically referred to the following steps S04 to S07.
In addition, according to P as described abovesumAnd PtargetWhen determining which allocation strategy to employ, taking into account when PsumAt PtargetWhen the nearby frequency fluctuates, the two allocation strategies are frequently switched to cause unstable control, and in order to avoid this, the embodiment of the present invention recommends a hysteresis comparison method, that is: the hysteresis width is represented by delta 1, delta 1 > 0, at Psum＜PtargetWhen delta 1, switching to an equal margin distribution strategy; at Psum＞Ptarget+ δ 1, switch to another allocation strategy; at Ptarget-δ1≤Psum≤Ptarget+ δ 1, consider PsumAnd PtargetNo deviation or small and negligible deviation is obtained between the two, and the distribution strategy at the last moment is maintained.
In step S02, δ is equal to 0 or δ 1, and a hysteresis comparison method is adopted when δ is equal to δ 1, and a hysteresis comparison method is not adopted when δ is equal to 0, both of which are within the scope of the present invention.
Step S03: and (5) performing power distribution of the new energy power station by adopting an equal margin distribution strategy, and then ending the control in the current round.
Specifically, the equal margin allocation policy means: controlling the ith generating unit according to the power distribution value
Figure BDA0002789201710000061
Carrying out power tracking, wherein i is 1, 2, … and n, n is the total number of the power generation units, n is more than or equal to 2, PsiIs the actual power of the ith power generation unit,
Figure BDA0002789201710000062
wherein the ith power generation unit is controlled according to the power distribution value
Figure BDA0002789201710000063
The power tracking is carried out, and the power distribution value can be obtained by the master control
Figure BDA0002789201710000064
Sending the data to the ith power generation unit, and receiving the data by each power generation unitIndependently performing power tracking on the power allocation values; or the ratio can be controlled
Figure BDA0002789201710000065
Sending the power to the ith power generation unit, and independently tracking the power of each power generation unit according to the control proportion received by each power generation unit, PRated_iIs the rated power of the ith power generation unit.
Step S04: and (4) performing power distribution of the new energy power station by adopting an equal proportion distribution strategy, and then entering the step S05.
The equal proportion allocation strategy is that: controlling the ith generating unit according to the power distribution value
Figure BDA0002789201710000071
Performing power tracking, PRated_iIs the rated power of the ith power generation unit,
Figure BDA0002789201710000072
is the sum of the rated powers of all the power generating units.
Wherein the ith power generation unit is controlled according to the power distribution value
Figure BDA0002789201710000073
The power tracking is carried out, and the power distribution value can be obtained by the master control
Figure BDA0002789201710000074
The power distribution value is sent to the ith power generation unit, and each power generation unit independently tracks power according to the power distribution value received by the power generation unit; alternatively, the master control will control the ratio
Figure BDA0002789201710000075
And sending the power to the ith power generation unit, and independently tracking the power by each power generation unit according to the control proportion received by each power generation unit.
Specifically, the equal proportion distribution strategy is to distribute the target power P of the new energy power stationtargetAccording to the individual generating units
Figure BDA0002789201710000076
The proportion is distributed, so that the generation unit with strong generating capacity is limited to generate power, the generation unit with weak generating capacity cannot generate power in full proportion, and finally the actual power of the new energy power station is low and probably cannot reach the target power PtargetThus, the target power P is not reachedtargetFurther improvement is needed on the basis of the equal proportion distribution strategy, which is shown in the following steps S05-S07.
Step S05: acquiring actual power P of the new energy power station under the equal proportion distribution strategysum', determine whether | P is satisfiedsum'-PtargetIf the | is less than or equal to S, ending the control in the current round; if not, the process proceeds to step S06. Wherein, S is a preset value not less than zero.
Specifically, when P issum' and PtargetWhen the deviation between the new energy power station and the new energy power station is large (namely, the deviation value is not less than S), the situation that the power optimal distribution of the new energy power station cannot be realized by adopting an equal proportion distribution strategy at present is shown; when P is presentsum' and PtargetWhen the deviation between the two is smaller than S, the deviation is considered to be very small and can be ignored, and at the moment, the power optimal distribution of the new energy power station is considered to be realized by adopting an equal proportion distribution strategy.
Step S06: searching for a power generation unit with a power distribution value-actual generation power less than or equal to K, and if the power generation unit meeting the requirement is searched, entering the step S07; if no power generation unit meeting the requirement exists, the control of the current round is finished. Wherein, K is a preset value not less than zero.
Step S07: increasing the control proportion of the power generation unit meeting the requirement, wherein the control proportion of the power generation unit is the power distribution value/P of the power generation unittarget. Thereafter, the process returns to step S05.
Specifically, in theory, the power generation unit with actual power reaching the power distribution value is a power generation unit with strong power generation capability, and the power generation unit with actual power smaller than the power distribution value is a power generation unit with weak power generation capability; considering the error influence, the power generation unit with the power distribution value-actual generation power less than or equal to K is regarded as the power generation capacity in practical applicationAnd the strong power generation unit regards the power generation unit with the power distribution value-actual power > K as the power generation unit with weak power generation capacity. When equal proportion distribution strategy is adopted, | P cannot be realizedsum'-PtargetWhen | ≦ S, P can be supplemented by increasing the control proportion of the generating unit with strong generating capacity and allowing the generating unit with strong generating capacity to generate more powersum' and PtargetThe difference between them.
If the proportion is increased once, P cannot be complementedsum' and PtargetThe difference between the two can be increased for several times to supplement P to the maximumsum' and PtargetThe difference between them. If the power generation unit with strong power generation capacity does not exist in the new energy power station, the situation that no space is continuously supplemented is shown, and the control of the current round is finished.
Alternatively, in step S07, the embodiment of the present invention increases the control ratios of the power generation units satisfying this requirement
Figure BDA0002789201710000081
PtotalsumThe sum of the differences between the power distribution values of the power generating units not meeting this requirement and the actual generated power.
As can be seen from the above description, the embodiment of the present invention cooperatively implements power optimized distribution of a new energy power station in a power-limited state by using two distribution strategies: adopting an equal margin distribution strategy when power needs to be tracked downwards; when the power needs to be tracked upwards, the power generation units with strong power generation capacity are enabled to generate more power on the basis of an equal proportion distribution strategy, so that the power generation amount which is deficient by the power generation units with weak power generation capacity is supplemented. Therefore, the actual power of the new energy power station in the power limiting state can reach the target power all the time or approach the target power to the maximum extent.
Optionally, any one of the disclosed power optimization distribution methods for the new energy power station further includes:
when the new energy power station is in an unlimited power state: if Psum＜Ptarget- δ, the new energy plant discharges at maximum power; if Psum＞Ptarget+ delta, with equal marginsThe distribution strategy is used for carrying out power distribution on the new energy power station; if Ptarget-δ≤Psum≤Ptarget+ δ, the allocation policy at the previous time is maintained.
For example, as shown in fig. 3, the corresponding power optimal distribution method for the new energy power station includes:
step S11: obtaining target power P of new energy power stationtarget。
Step S12: and judging whether the new energy power station is in a power limiting state, if so, entering the step S13, and if not, entering the step S20.
Step S13: will PsumAnd Ptarget-δ、Ptarget+ δ comparison size; if Psum＜Ptargetδ, go to step S14; if Psum＞Ptarget+ δ, step S15; if Ptarget-δ≤Psum≤PtargetAnd + δ, maintaining the allocation strategy at the previous time, and ending the control of the current round. Wherein, PsumDelta is a preset value which is not less than zero and is the actual power of the new energy power station.
Step S14: and (5) performing power distribution of the new energy power station by adopting an equal margin distribution strategy, and then ending the control in the current round.
Step S15: and (4) performing power distribution of the new energy power station by adopting an equal proportion distribution strategy, and then entering the step S16.
Step S16: acquiring actual power P of the new energy power station under the equal proportion distribution strategysum', determine whether | P is satisfiedsum'-PtargetIf the | is less than or equal to S, ending the control in the current round; if not, the process proceeds to step S17. Wherein, S is a preset value not less than zero.
Step S17: searching for a power generation unit with a power distribution value-actual generation power less than or equal to K, and if the power generation unit meeting the requirement is searched, entering the step S18; if no power generation unit meeting the requirement exists, the control of the current round is finished. Wherein, K is a preset value not less than zero.
Step S18: increasing the control proportion of the power generation unit meeting the requirement, wherein the control proportion of the power generation unit is the power distribution value/P of the power generation unittarget. Then returning to the stepStep S16.
Step S19: will PsumAnd Ptarget-δ、Ptarget+ δ comparison size; if Psum＜Ptargetδ, go to step S20; if Psum＞Ptarget+ δ, step S21; if Ptarget-δ≤Psum≤Ptarget+ δ, the present round of control is ended.
Step S20: and discharging the new energy power station according to the maximum power, and then finishing the control.
Step S21: and (5) performing power distribution of the new energy power station by adopting an equal margin distribution strategy, and then ending the current control.
Corresponding to the above method embodiment, the embodiment of the present invention further discloses a new energy power station, which includes a plurality of power generation units and a processor, as shown in fig. 4, the dashed line represents a communication link, and the solid line represents a cable; the processor is used for running a program, and when the processor runs the program, the following steps are realized:
when the new energy power station is in a power limiting state, acquiring target power P of the new energy power stationtargetAnd the actual power P of the new energy power stationsumAnd Ptarget-δ、PtargetComparing the + delta, wherein delta is a preset value not less than zero;
if Psum＜PtargetDelta, performing power distribution of the new energy power station by adopting an equal margin distribution strategy;
if Psum＞Ptarget+ δ, then: carrying out power distribution on the new energy power station by adopting an equal proportion distribution strategy; acquiring actual power P of the new energy power station under the equal proportion distribution strategysum', determine whether | P is satisfiedsum'-PtargetS is not more than S, and S is a preset value not less than zero; if not, searching the power generation unit with the difference value between the power distribution value and the actual power less than or equal to K in the new energy power station, and then increasing the control proportion of the power generation unit meeting the requirement until | Psum'-PtargetStopping performing the determination whether | P is satisfied or not when | S ≦ or there is no power generation unit satisfying this requirementsum'-PtargetA step of | ≦ S; wherein, KThe preset value is not less than zero, and the control ratio of the power generation unit is the power distribution value/P of the power generation unittarget。
Optionally, increasing the control ratio of the power generation unit meeting the requirement includes: increase the control ratio of the power generation unit satisfying this requirement
Figure BDA0002789201710000101
PnmThe sum of the rated powers, P, of all the power generating units satisfying this requirementtotalsumIs the sum of said differences for all power generating units not meeting this requirement.
Optionally, in the new energy power station, the performing power distribution of the new energy power station by using an equal margin distribution strategy includes:
allocating power to values
Figure BDA0002789201710000111
Sending to the ith power generation unit, and independently tracking power according to the power distribution value received by each power generation unit, PsiThe actual power of the ith power generation unit; alternatively, the ratio will be controlled
Figure BDA0002789201710000112
Sending the power to the ith power generation unit, and independently tracking the power of each power generation unit according to the control proportion received by each power generation unit, PRated_iIs the rated power of the ith power generation unit.
Optionally, in any one of the new energy power stations disclosed above, the performing power distribution of the new energy power station by using an equal proportion distribution strategy includes:
allocating power to values
Figure BDA0002789201710000113
The power distribution value is sent to the ith power generation unit, and each power generation unit independently tracks power according to the power distribution value received by the power generation unit; alternatively, the ratio will be controlled
Figure BDA0002789201710000114
Sending the power to the ith power generation unit, and independently tracking the power of each power generation unit according to the control proportion received by each power generation unit, PRated_iIs the rated power of the ith power generation unit.
Optionally, in any one of the new energy power stations disclosed above, when the processor runs the program, the following steps are further implemented:
when the new energy power station is in an unlimited power state: if Psum＜PtargetDelta, outputting power by the new energy power station in a maximum power tracking mode; if Psum＞PtargetAnd + delta, performing power distribution of the new energy power station by adopting an equal margin distribution strategy.
Optionally, in any one of the new energy power stations disclosed above, δ > 0, S > 0, and K > 0.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The terms "first," "second," and the like in the description and in the claims, and in the drawings, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the use of the verb "comprise a" to define an element does not exclude the presence of another, identical element in a process, method, article, or apparatus that comprises the element.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
For the system embodiment, since it basically corresponds to the method embodiment, the description is relatively simple, and for the relevant points, reference may be made to the partial description of the method embodiment. The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the embodiments. Thus, the present embodiments are not intended to be limited to the embodiments shown herein but are to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (12)

1. A new energy power station power optimization distribution method is characterized by comprising the following steps:
when the new energy power station is in a power limiting state, acquiring target power P of the new energy power stationtargetAnd the actual power P of the new energy power stationsumAnd Ptarget-δ、PtargetComparing the + delta, wherein delta is a preset value not less than zero;
if Psum＜PtargetDelta, performing power distribution of the new energy power station by adopting an equal margin distribution strategy;
if Psum＞Ptarget+ δ, then: carrying out power distribution on the new energy power station by adopting an equal proportion distribution strategy; acquiring actual power P of the new energy power station under the equal proportion distribution strategysum', determine whether | P is satisfiedsum'-PtargetS is not more than S, and S is a preset value not less than zero; if not, searching the power generation unit with the difference value between the power distribution value and the actual power less than or equal to K in the new energy power station, and then increasing the control proportion of the power generation unit meeting the requirement until | Psum'-PtargetStopping performing the determination whether | P is satisfied or not when | S ≦ or there is no power generation unit satisfying this requirementsum'-PtargetA step of | ≦ S; wherein K is a preset value not less than zero, and the control ratio of the power generation unit is the power distribution value/P of the power generation unittarget。
2. The optimal power distribution method for the new energy power station as claimed in claim 1, wherein the increasing of the control proportion of the power generation units meeting the requirement comprises: increase the control ratio of the power generation unit satisfying this requirement
Figure FDA0002789201700000011
PnmFor all power generation meeting this requirementSum of rated power of cells, PtotalsumIs the sum of said differences for all power generating units not meeting this requirement.
3. The optimal power distribution method for the new energy power station according to claim 1 or 2, wherein the power distribution method for the new energy power station by adopting the equal margin distribution strategy comprises the following steps:
allocating power to values
Figure FDA0002789201700000012
Sending to the ith power generation unit, and independently tracking power according to the power distribution value received by each power generation unit, PsiThe actual power of the ith power generation unit; alternatively, the ratio will be controlled
Figure FDA0002789201700000013
Sending the power to the ith power generation unit, and independently tracking the power of each power generation unit according to the control proportion received by each power generation unit, PRated_iIs the rated power of the ith power generation unit.
4. The optimal power distribution method for the new energy power station as claimed in claim 1 or 2, wherein the power distribution method for the new energy power station by adopting the equal proportion distribution strategy comprises the following steps:
allocating power to values
Figure FDA0002789201700000021
The power distribution value is sent to the ith power generation unit, and each power generation unit independently tracks power according to the power distribution value received by the power generation unit; alternatively, the ratio will be controlled
Figure FDA0002789201700000022
Sending the power to the ith power generation unit, and independently tracking the power of each power generation unit according to the control proportion received by each power generation unit, PRated_iIs the rated power of the ith power generation unit.
5. The new energy power station power optimized distribution method of claim 1 or 2, characterized by further comprising:
when the new energy power station is in an unlimited power state: if Psum＜PtargetDelta, outputting power by the new energy power station in a maximum power tracking mode; if Psum＞PtargetAnd + delta, performing power distribution of the new energy power station by adopting an equal margin distribution strategy.
6. The optimal power distribution method for the new energy power station according to claim 1 or 2, characterized in that δ > 0, S > 0 and K > 0.
7. A new energy power station is characterized by comprising a plurality of power generation units and a processor; the processor is used for running a program, and when the processor runs the program, the following steps are realized:
when the new energy power station is in a power limiting state, acquiring target power P of the new energy power stationtargetAnd the actual power P of the new energy power stationsumAnd Ptarget-δ、PtargetComparing the + delta, wherein delta is a preset value not less than zero;
if Psum＜PtargetDelta, performing power distribution of the new energy power station by adopting an equal margin distribution strategy;
if Psum＞Ptarget+ δ, then: carrying out power distribution on the new energy power station by adopting an equal proportion distribution strategy; acquiring actual power P of the new energy power station under the equal proportion distribution strategysum', determine whether | P is satisfiedsum'-PtargetS is not more than S, and S is a preset value not less than zero; if not, searching the power generation unit with the difference value between the power distribution value and the actual power less than or equal to K in the new energy power station, and then increasing the control proportion of the power generation unit meeting the requirement until | Psum'-PtargetStopping performing the determination whether | P is satisfied or not when | S ≦ or there is no power generation unit satisfying this requirementsum'-PtargetA step of | ≦ S; wherein K is a preset value not less than zero, and the control of the power generation unitThe ratio is the power distribution value/P of the power generation unittarget。
8. The new energy plant of claim 7, characterized in that the increase of the control ratio of the power generating units meeting this requirement comprises: increase the control ratio of the power generation unit satisfying this requirement
Figure FDA0002789201700000031
PnmThe sum of the rated powers, P, of all the power generating units satisfying this requirementtotalsumIs the sum of said differences for all power generating units not meeting this requirement.
9. The new energy plant of claim 7 or 8, characterized in that the new energy plant power distribution using an equal margin distribution strategy comprises:
allocating power to values
Figure FDA0002789201700000032
Sending to the ith power generation unit, and independently tracking power according to the power distribution value received by each power generation unit, PsiThe actual power of the ith power generation unit; alternatively, the ratio will be controlled
Figure FDA0002789201700000033
Sending the power to the ith power generation unit, and independently tracking the power of each power generation unit according to the control proportion received by each power generation unit, PRated_iIs the rated power of the ith power generation unit.
10. The new energy plant of claim 7 or 8, characterized in that the new energy plant power distribution using the equal proportion distribution strategy comprises:
allocating power to values
Figure FDA0002789201700000034
Is issued to the ith power generation unitEach power generation unit independently tracks power according to the power distribution value received by the power generation unit; alternatively, the ratio will be controlled
Figure FDA0002789201700000035
Sending the power to the ith power generation unit, and independently tracking the power of each power generation unit according to the control proportion received by each power generation unit, PRated_iIs the rated power of the ith power generation unit.
11. The new energy plant of claim 7 or 8, characterized in that the processor, when running the program, further performs the steps of:
when the new energy power station is in an unlimited power state: if Psum＜PtargetDelta, outputting power by the new energy power station in a maximum power tracking mode; if Psum＞PtargetAnd + delta, performing power distribution of the new energy power station by adopting an equal margin distribution strategy.
12. The new energy plant of claim 7 or 8, characterized in that δ > 0, S > 0, K > 0.
CN202011309068.XA 2020-11-20 2020-11-20 New energy power station and power optimal distribution method thereof Active CN112491095B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011309068.XA CN112491095B (en) 2020-11-20 2020-11-20 New energy power station and power optimal distribution method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011309068.XA CN112491095B (en) 2020-11-20 2020-11-20 New energy power station and power optimal distribution method thereof

Publications (2)

Publication Number Publication Date
CN112491095A true CN112491095A (en) 2021-03-12
CN112491095B CN112491095B (en) 2023-01-10

Family

ID=74932347

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011309068.XA Active CN112491095B (en) 2020-11-20 2020-11-20 New energy power station and power optimal distribution method thereof

Country Status (1)

Country Link
CN (1) CN112491095B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117890667A (en) * 2024-03-14 2024-04-16 杭州欣美成套电器制造有限公司 Power energy consumption monitoring method and system of standardized metering box

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104124707A (en) * 2014-07-23 2014-10-29 北京四方继保自动化股份有限公司 Hydropower station power quick adjustment system and implementation method based on intensive small hydropower station groups
CN107196349A (en) * 2017-05-04 2017-09-22 国电南瑞科技股份有限公司 A kind of new energy real power control method of Electricity Market electricity power transaction
WO2018205315A1 (en) * 2017-05-11 2018-11-15 南京南瑞继保电气有限公司 Rapid power coordination control method for new energy station to participate in primary frequency regulation
CN110854935A (en) * 2019-12-08 2020-02-28 国网山西省电力公司电力科学研究院 Photovoltaic power station active power automatic control method with sample plate inverter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104124707A (en) * 2014-07-23 2014-10-29 北京四方继保自动化股份有限公司 Hydropower station power quick adjustment system and implementation method based on intensive small hydropower station groups
CN107196349A (en) * 2017-05-04 2017-09-22 国电南瑞科技股份有限公司 A kind of new energy real power control method of Electricity Market electricity power transaction
WO2018205315A1 (en) * 2017-05-11 2018-11-15 南京南瑞继保电气有限公司 Rapid power coordination control method for new energy station to participate in primary frequency regulation
CN110854935A (en) * 2019-12-08 2020-02-28 国网山西省电力公司电力科学研究院 Photovoltaic power station active power automatic control method with sample plate inverter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
时建锋等: "大规模混合式新能源接入电网电压优化协调控制系统设计与实现", 《电气自动化》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117890667A (en) * 2024-03-14 2024-04-16 杭州欣美成套电器制造有限公司 Power energy consumption monitoring method and system of standardized metering box

Also Published As

Publication number Publication date
CN112491095B (en) 2023-01-10

Similar Documents

Publication Publication Date Title
Hosseinipour et al. Virtual inertia control of PV systems for dynamic performance and damping enhancement of DC microgrids with constant power loads
CN111092429B (en) Optimized scheduling method of flexible interconnected power distribution network, storage medium and processor
CN111162888B (en) Distributed antenna system, remote access unit, power distribution method, and medium
CN104540176A (en) Access method of wireless network, device and terminal
CN112491095B (en) New energy power station and power optimal distribution method thereof
CN111885618B (en) Network performance optimization method and device
CN113910961A (en) Flexible charging power distribution method, device and system for electric automobile
CN109768626B (en) Plug-and-play energy flow implementation method for energy storage power station
Zaery et al. Low operational cost distributed prioritised coordinated control for DC microgrids
MS et al. Mitigation of circulating current with effective energy management in low‐power PV‐FC‐battery‐microgrid
CN113659611B (en) Control method for virtual inertia of virtual synchronous generator in grid-connected mode
CN113690949A (en) Control mode switching method and device for energy storage system of new energy station
CN112752327B (en) Power adjustment method and access network equipment
CN114641036A (en) Load balancing method and device, base station and computer readable storage medium
Kulkarni et al. Finite-time lower bounds for the two-armed bandit problem
CN104684085A (en) Method, terminal and system for reelecting carrier, and network equipment
CN110856183A (en) Edge server deployment method based on heterogeneous load complementation and application
Lee et al. Trajectory-aware edge node clustering in vehicular edge clouds
CN116167082A (en) Data processing method and device, electronic equipment and storage medium
CN113629764A (en) Charge-discharge control method and application device thereof
KR102568487B1 (en) Apparatus and method for controlling energy storagy system
CN113381434A (en) Method and device for optimizing operation mode of flexible direct-current power grid
CN113922425A (en) Overvoltage treatment method and device for low-voltage line
CN114389258A (en) Method and device for optimizing load bearing of radiation power supply circuit
CN113300385A (en) Power grid frequency adjusting method and system of hybrid energy storage system and storage medium

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
CB02 Change of applicant information
CB02 Change of applicant information

Address after: High tech Zone of Hefei city of Anhui Province in 230088 Lake Road No. 2

Applicant after: Sunshine New Energy Development Co.,Ltd.

Address before: High tech Zone of Hefei city of Anhui Province in 230088 Lake Road No. 2

Applicant before: Sunshine New Energy Development Co.,Ltd.

Address after: High tech Zone of Hefei city of Anhui Province in 230088 Lake Road No. 2

Applicant after: Sunshine New Energy Development Co.,Ltd.

Address before: 230088 2nd floor, scientific research building, sunshine power plant, No.2 Tianhu Road, high tech Zone, Hefei City, Anhui Province

Applicant before: HEFEI SUNGROW RENEWABLE ENERGY SCI. & TECH. Co.,Ltd.

GR01 Patent grant
GR01 Patent grant