CN108400581A - Isolated island division methods based on energy constraint - Google Patents
Isolated island division methods based on energy constraint Download PDFInfo
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- CN108400581A CN108400581A CN201810096408.1A CN201810096408A CN108400581A CN 108400581 A CN108400581 A CN 108400581A CN 201810096408 A CN201810096408 A CN 201810096408A CN 108400581 A CN108400581 A CN 108400581A
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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
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- H02J3/383—
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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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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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
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
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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
Abstract
The present invention provides the isolated island division methods based on energy constraint, belong to the energy parameter in electrical management field, including determination isolated island to be divided；The optimal isolated island partitioning model with each light electricity storage station in network system is established based on energy constraint condition；Established optimal Isolate model is solved, isolated island range corresponding with each light electricity storage station is got, there will be the isolated island ranges of intersection to carry out fusion treatment, obtains the isolated island of not intersection；Power dispatching verification is carried out to the isolated island of obtained not intersection, if verified by power dispatching, exports isolated island range, terminates isolated island and divides.It is examined by power dispatching in isolated island, ensure that the power-balance of day part during islet operation.Model in the present invention is linear model, can be solved by ripe business software, has faster solving speed and higher global optimizing ability compared to Heuristic Model and method.
Description
Technical field
The invention belongs to electrical management fields, more particularly to the isolated island division methods based on energy constraint.
Background technology
Electric power isolated island refers to a part of distribution network detached with main system, and islet operation then requires isolated island by one or more
A distributed generation resource is independently-powered, is continued to run with certain voltage to frequency.Optimal isolated island is divided into determining isolated island optimized scope
Process.
It includes in isolated island between the output and supply load of distributed generation resource that existing optimal isolated island, which divides the principle followed,
Unbalanced power amount is small as possible, power consumer is as much as possible in the isolated island period restores electricity, considering load importance
Mostly as possible in the case of degree is important load power supply, when reducing switch motion on distribution network line, islet operation to the greatest extent
Network structure before failure is changed few etc. as possible.It is mainly the division based on static power that current isolated island, which divides, in isolated island
Operating load is relatively low during operation, causes power supply limited.
Invention content
In order to solve shortcoming and defect existing in the prior art, the present invention provides examined by power dispatching in isolated island
It tests, ensure that the isolated island division methods based on energy constraint of the power-balance of day part during islet operation.
In order to reach above-mentioned technical purpose, the present invention provides the isolated island division methods based on energy constraint, the isolated islands
Division methods, including：
Determine the energy parameter in isolated island to be divided；
Based on energy constraint condition, the optimal isolated island partitioning model with each light electricity storage station in network system is established；
Established optimal Isolate model is solved, isolated island range corresponding with each light electricity storage station is got, it will
There are the isolated island ranges of intersection to carry out fusion treatment, obtains the isolated island of not intersection；
Power dispatching verification is carried out to the isolated island of obtained not intersection to export if verified by power dispatching
Isolated island range terminates isolated island and divides.
Optionally, the isolated island division methods further include：
If do not verified by power dispatching, re-establishes and drawn with the optimal isolated island of each light electricity storage station in network system
The step of sub-model, progress model solution, power dispatching are examined.
Optionally, the energy parameter in determination isolated island to be divided, including：
The energy parameter includes that the energy of load, battery energy storage system, photovoltaic generating system and electric vehicle cluster refers to
Mark；
EBE,i=SOCBE,i(Ts)·CBE,i (1)
Wherein, EBE,i, EPV,i, EEV,iAnd EL,iRespectively battery energy storage system, photovoltaic generating system and electric vehicle cluster
With the energy indexes of load, TsAnd TeThe initial time and end time that respectively isolated island divides；I is node serial number, SOCBE,iFor
The residual power percentage of i-node battery energy storage system, SOCEV,i,jFor in i-node electric vehicle cluster, jth electric vehicle
The residual power percentage of battery, CBE,iAnd CEVThe respectively appearance of the capacity of battery energy storage system and single amount batteries of electric automobile
Amount；PL,i(t) and PPV,i(t) be respectively t moment i-node load and photovoltaic system maximum active power output, NEV,iFor i-node electricity
The number of electric vehicle in electrical automobile cluster；
The energy indexes of network node are defined as follows：
Ei=EBE,i+EL,i+EPV,i+EEV,i (5)
Wherein, EiFor the energy indexes of node i.
Optionally, described to be based on energy constraint condition, it establishes and is drawn with the optimal isolated island of each light electricity storage station in network system
Sub-model, including：
X0=1 (8)
Xi ∈ { 0,1 } i=1,2 ... n (9)
Wherein, light electricity storage station access node number is 0, { xiIt is that binary system controls variable, when i-node is in light electricity storage station institute
When in the isolated island of power supply, xiValue is 1, and no person's value is 0, diThe weight of load, a are accessed for i-nodeiIt is when No. 0 node is set as
When root node, the corresponding father node of i-node.
Optionally, described that established optimal Isolate model is solved, it gets corresponding with each light electricity storage station
Isolated island range, there will be the isolated island ranges of intersection to carry out fusion treatment, obtains the isolated island of not intersection, including：
With software YALMIP direct solutions；When carrying out isolated island division to one of light electricity storage station, remaining light storing up electricity
Energy indexes of standing are set as 0；Fusion has the isolated island method of intersection as follows：By the node where the light electricity storage station having in the isolated island of intersection
And all nodes that light storing up electricity tiny node is connected on path are fused into an equivalent node, the energy indexes of equivalent node are：
Wherein, areaA is indicated in the isolated island of intersection, all nodes on light storing up electricity tiny node and connected exclusive path
Set, EEn,AIt is the energy indexes of equivalent node；
Removing has the isolated island division result of intersection, and equivalent node is considered as new light storing up electricity tiny node and carries out isolated island to it
The determination of range；The process of isolated island fusion is repeated, until all isolated islands do not have intersection.
Optionally, the isolated island to obtained not intersection carries out power dispatching verification, including：
Power dispatching testing model is as follows：
EBE,i(t+ Δs t)=EBE,i(t)-PBE,i(t)·Δt (19)
EEV,i(t+ Δs t)=EEV,i(t)-PEV,i(t)·Δt (20)
0≤EBE,i(t)≤CBE,i (21)
0≤EEV,i(t)≤NEV,i·CEV (22)
Wherein, PBEAnd PEVVariable in order to control indicates the power of battery energy storage and electric vehicle, P respectivelyun(t) it is t moment
Missing power in isolated island, PEV,i(t) it is the power of the electric vehicle cluster of t moment i-node access, calculation expression is
(15), PBE,i(t) power of battery energy storage is accessed for t moment i-node, Ω is the set of isolated island interior nodes, Pmax BE, ch, i
With Pmax BE, dis, i are constant, indicate the energy-storage system maximum charge power and maximum discharge power of i-node access respectively,
Pmax EV, ch and Pmax EV, dis are constant, indicate the maximum charge power of single amount electric vehicle and maximum electric discharge work(respectively
Rate, nch,i(t) and ndis,i(t) it is respectively the electric vehicle cluster number to charge of t moment i-node access and the number to discharge,
nch,i(t) and ndis,i(t) the upper bound is calculated by formula (16) and (17) respectively, robeyElectricity during user side demand response
The response coefficient of electrical automobile, the responsiveness that reaction automobile user instructs dispatching of power netwoks, EEV,i(t) and EBE,i(t) respectively
For the remaining capacity of the EV clusters and battery energy storage system of the access of t moment i-node.
Optionally, the isolated island division methods further include：
Power dispatching model business software such as YALMIP direct solutions judge work(if objective function optimization result is 0
Rate scheduling is upchecked；Otherwise judgement scheduling, which is examined, does not pass through.
Optionally, the isolated island division methods further include：
Judge whether formula (23) is true, if formula (23) is set up, is determined as distributed resource power enabling capabilities in isolated island
Otherwise deficiency is determined as distributed resource energy transfer scarce capacity in isolated island：
The method being modified to isolated island partitioning model according to judging result is as follows：
When formula (23) are set up, P'un (t) is calculated to all moment first, and choose when P'un (t) is maximized and correspond to
At the time of, it is denoted as Tun, TunIt illustrates that load is more than the Extreme periods that PV contributes, adds TunThe power constraint at moment is drawn to isolated island
In sub-model：
When formula (23) is invalid, in addition constraint (25)-(38) to isolated island partitioning model：
EBE,0(Ts)=SOCBE,0(Ts)·CBE,0 (25)
E′BE,0(T+ Δ T)=EBE,0(T)+PBE(t)·ΔT (27)
E′EV,all(T+ Δ T)=EEV,all(T)+PEV,all(t)·ΔT (28)
EEV,all(T+ Δ T)=min (NEV,all·CEV,E′EV,all(T+ΔT)) (34)
EBE,0(t)≥0 (35)
EEV,all(t)≥0 (36)
Wherein, EEV,all(t) it is the total electricity of moment t electric vehicle cluster storage, Nch,allFor can in electric vehicle cluster
The electric vehicle number upper limit of charging, Ndis,allFor the transformation for the electric vehicle that can discharge in electric vehicle cluster.
The advantageous effect that technical solution provided by the invention is brought is：
By defining energy indexes, the fluctuation of load and distributed resource power is related to, while being tieed up in mathematical model
Traditional isolated island division methods knapsack tree-model form is held.The present invention is examined by power dispatching in isolated island, ensure that isolated island is transported
The power-balance of day part between the departure date.
Description of the drawings
It, below will be to attached drawing needed in embodiment description in order to illustrate more clearly of technical scheme of the present invention
It is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, general for this field
For logical technical staff, without creative efforts, other drawings may also be obtained based on these drawings.
Fig. 1 is the flow diagram of the isolated island division methods provided in an embodiment of the present invention based on energy constraint.
Fig. 2 is test example schematic diagram provided in an embodiment of the present invention；
Fig. 3 is each region part throttle characteristics figure in test example provided in an embodiment of the present invention；
Fig. 4 is the isolated island division result figure provided in an embodiment of the present invention based on energy constraint；
Fig. 5 is revised isolated island division result figure provided in an embodiment of the present invention.
Specific implementation mode
To keep structure of the invention and advantage clearer, the structure of the present invention is made further below in conjunction with attached drawing
Description.
Embodiment one
In order to reach above-mentioned technical purpose, the present invention provides the isolated island division methods based on energy constraint, such as Fig. 1 institutes
Show, the isolated island division methods, including：
11, the energy parameter in isolated island to be divided is determined；
12, it is based on energy constraint condition, establishes the optimal isolated island partitioning model with each light electricity storage station in network system；
13, established optimal Isolate model is solved, gets isolated island range corresponding with each light electricity storage station,
There will be the isolated island ranges of intersection to carry out fusion treatment, obtains the isolated island of not intersection；
14, power dispatching verification is carried out to the isolated island of obtained not intersection, it is defeated if verified by power dispatching
Go out isolated island range, terminates isolated island and divide.
In force, in order to complete to divide the isolated island in power supply grid system, the present invention, which proposes, is based primarily upon energy
Constrain the isolated island division methods established Isolate model and then solved based on Isolate model.
Condition of the existing isolated island division methods by the balance of static power as islet operation, has ignored the islet operation phase
Between load and distributed resource power wave characteristic.The present invention relates to load and distributed money by defining energy indexes
The fluctuation of source power, while traditional isolated island division methods knapsack tree-model form is maintained in mathematical model.The present invention passes through
Power dispatching is examined in isolated island, ensure that the power-balance of day part during islet operation.Model in the present invention is linear
Model can be solved by ripe business software, have faster solving speed and higher compared to Heuristic Model and method
Global optimizing ability.
Optionally, the isolated island division methods further include：
If do not verified by power dispatching, re-establishes and drawn with the optimal isolated island of each light electricity storage station in network system
The step of sub-model, progress model solution, power dispatching are examined.
In force, in above process if do not verified by power dispatching, it is meant that back obtain without handing over
The isolated island of collection does not meet the definition to isolated island, needs to re-execute the step of obtaining isolated island, and to the orphan of obtained not intersection
It is detected again on island.
Optionally, the energy parameter in determination isolated island to be divided, including：
The energy parameter includes that the energy of load, battery energy storage system, photovoltaic generating system and electric vehicle cluster refers to
Mark；
EBE,i=SOCBE,i(Ts)·CBE,i (1)
Wherein, EBE,i, EPV,i, EEV,iAnd EL,iRespectively battery energy storage system, photovoltaic generating system and electric vehicle cluster
With the energy indexes of load, TsAnd TeThe initial time and end time that respectively isolated island divides；I is node serial number, SOCBE,iFor
The residual power percentage of i-node battery energy storage system, SOCEV,i,jForiIn node electric vehicle cluster, jth electric vehicle
The residual power percentage of battery, CBE,iAnd CEVThe respectively appearance of the capacity of battery energy storage system and single amount batteries of electric automobile
Amount；PL,i(t) and PPV,i(t) be respectively t moment i-node load and photovoltaic system maximum active power output, NEV,iFor i-node electricity
The number of electric vehicle in electrical automobile cluster.
The energy indexes of network node are defined as follows：
Ei=EBE,i+EL,i+EPV,i+EEV,i (5)
Wherein, EiFor the energy indexes of node i.
In force, it needs to be determined that including numerous energy parameters including being likely to become isolated island before carrying out isolated island and dividing.
Specific above-mentioned energy parameter includes the energy indexes of load, battery energy storage system, photovoltaic generating system and electric vehicle cluster.
The calculation that above-mentioned four kinds of different type energy indexes are got by formula (1) to (4), to be accurate in subsequent step
Judgement isolated island is ready.
Optionally, described to be based on energy constraint condition, it establishes and is drawn with the optimal isolated island of each light electricity storage station in network system
Sub-model, including：
x0=1 (8)
xi∈ { 0,1 } i=1,2 ... n (9)
Wherein, light electricity storage station access node number is 0, { xiIt is that binary system controls variable, when i-node is in light electricity storage station institute
When in the isolated island of power supply, xiValue is 1, and no person's value is 0, diThe weight of load, a are accessed for i-nodeiIt is when No. 0 node is set as
When root node, the corresponding father node of i-node.
In force, in order to mark off isolated island to the energy indexes having had determined that, it is also necessary to isolated island partitioning model is built, it should
Shown in the expression formula of model such as formula (6), which further includes the constraints as shown in formula (7), the ginseng in constraints
Shown in number value, value range such as formula (8) to (10).
Optionally, described that established optimal Isolate model is solved, it gets corresponding with each light electricity storage station
Isolated island range, there will be the isolated island ranges of intersection to carry out fusion treatment, obtains the isolated island of not intersection, including：
With software YALMIP direct solutions；When carrying out isolated island division to one of light electricity storage station, remaining light storing up electricity
Energy indexes of standing are set as 0；Fusion has the isolated island method of intersection as follows：By the node where the light electricity storage station having in the isolated island of intersection
And all nodes that light storing up electricity tiny node is connected on path are fused into an equivalent node, the energy indexes of equivalent node are：
Wherein, areaA is indicated in the isolated island of intersection, all nodes on light storing up electricity tiny node and connected exclusive path
Set, EEn,AIt is the energy indexes of equivalent node.
Removing has the isolated island division result of intersection, and equivalent node is considered as new light storing up electricity tiny node and carries out isolated island to it
The determination of range；The process of isolated island fusion is repeated, until all isolated islands do not have intersection.
In force, in order to after building isolated island solving model, by YALMIP direct solutions, until get and its
He does not have the isolated island of intersection by light electricity storage station.In solution procedure if there is isolated island range there are the situation of intersection, then there will be friendships
The isolated island of collection carries out fusion treatment, until intersection is not present with other light electricity storage stations in the isolated island finally got.
Optionally, the isolated island to obtained not intersection carries out power dispatching verification, including：
Power dispatching testing model is as follows：
EBE,i(t+ Δs t)=EBE,i(t)-PBE,i(t)·Δt (19)
EEV,i(t+ Δs t)=EEV,i(t)-PEV,i(t)·Δt (20)
0≤EBE,i(t)≤CBE,i (21)
0≤EEV,i(t)≤NEV,i·CEV (22)
Wherein, PBEAnd PEVVariable in order to control indicates the power of battery energy storage and electric vehicle, P respectivelyun(t) it is t moment
Missing power in isolated island, PEV,i(t) it is the power of the electric vehicle cluster of t moment i-node access, calculation expression is
(15), PBE,i(t) power of battery energy storage is accessed for t moment i-node, Ω is the set of isolated island interior nodes, Pmax BE, ch, i
With Pmax BE, dis, i are constant, indicate the energy-storage system maximum charge power and maximum discharge power of i-node access respectively,
Pmax EV, ch and Pmax EV, dis are constant, indicate the maximum charge power of single amount electric vehicle and maximum electric discharge work(respectively
Rate, nch,i(t) and ndis,i(t) it is respectively the electric vehicle cluster number to charge of t moment i-node access and the number to discharge,
nch,i(t) and ndis,i(t) the upper bound is calculated by formula (16) and (17) respectively, robeyElectricity during user side demand response
The response coefficient of electrical automobile, the responsiveness that reaction automobile user instructs dispatching of power netwoks, EEV,i(t) and EBE,i(t) respectively
For the remaining capacity of the EV clusters and battery energy storage system of the access of t moment i-node.
Optionally, the isolated island division methods further include：
Power dispatching model business software such as YALMIP direct solutions judge work(if objective function optimization result is 0
Rate scheduling is upchecked；Otherwise judgement scheduling, which is examined, does not pass through.
Optionally, the isolated island division methods further include：
Judge whether formula (23) is true, if formula (23) is set up, is determined as distributed resource power enabling capabilities in isolated island
Otherwise deficiency is determined as distributed resource energy transfer scarce capacity in isolated island：
The method being modified to isolated island partitioning model according to judging result is as follows：
When formula (23) are set up, P'un (t) is calculated to all moment first, and choose when P'un (t) is maximized and correspond to
At the time of, it is denoted as Tun, TunIt illustrates that load is more than the Extreme periods that PV contributes, adds TunThe power constraint at moment is drawn to isolated island
In sub-model：
When formula (23) is invalid, in addition constraint (25)-(38) to isolated island partitioning model：
EBE,0(Ts)=SOCBE,0(Ts)·CBE,0 (25)
E′BE,0(T+ Δ T)=EBE,0(T)+PBE(t)·ΔT (27)
E′EV,all(T+ Δ T)=EEV,all(T)+PEV,all(t)·ΔT (28)
EEV,all(T+ Δ T)=min (NEV,all·CEV,E′EV,all(T+ΔT)) (34)
EBE,0(t)≥0 (35)
EEV,all(t)≥0 (36)
Wherein, EEV,all(t) it is the total electricity of moment t electric vehicle cluster storage, Nch,allFor can in electric vehicle cluster
The electric vehicle number upper limit of charging, Ndis,allFor the transformation for the electric vehicle that can discharge in electric vehicle cluster.
The present invention provides the energy ginsengs in the isolated island division methods based on energy constraint, including determination isolated island to be divided
Number；Based on energy constraint condition, the optimal isolated island partitioning model with each light electricity storage station in network system is established；To established
Optimal Isolate model is solved, and gets isolated island range corresponding with each light electricity storage station, there will be the isolated island ranges of intersection
Fusion treatment is carried out, the isolated island of not intersection is obtained；Power dispatching verification is carried out to the isolated island of obtained not intersection, if
It is verified by power dispatching, then exports isolated island range, terminated isolated island and divide.By introducing determining for energy indexes in partition process
Justice relates to the fluctuation of load and distributed resource power, while traditional isolated island division methods back of the body is maintained in mathematical model
Packet tree-model form.The step of power dispatching is examined is introduced in isolated island simultaneously, ensure that the power of day part during islet operation
Balance, is solved by ripe business software, has faster solving speed and higher complete compared to Heuristic Model and method
Office's optimizing ability.
It illustrates
In the present embodiment, 69 node systems of improved PG＆E are chosen as test example.Photovoltaic, energy storage and electric vehicle
The on-position of cluster and the subregion of test example are shown in Fig. 2.Each area in region 1, region 2, region 3 is set forth in Fig. 2
The Node distribution in domain is illustrated.Include the distribution feelings of energy storage BE, photovoltaic PV and electric vehicle EV in several nodes wherein
Condition.
In addition, the part throttle characteristics in aforementioned three regions regions Zhong Ge is shown in Fig. 3.The islet operation period is 11:00AM to 4:
00PM, Δ t are set as 15 minutes.The setting of load weight is as follows：7,10,11,13,16,22,28,43,45-48,59,60 He of node
The load weight connected at 63 is set as 1；Node 6,9,12,18,35,37,42,51,57 is set as with the load weight connected at 62
5, the load weight of other node connections is set as 3.In light electricity storage station, the rated power of photovoltaic 1-5 is respectively 100kW, 300kW,
100kW, 300kW and 100kW.In electric vehicle cluster, the single specified charge-discharge electric power of electric vehicle is 5kW, single electronic vapour
Vehicle battery capacity is 15kWh, and automobile user participates in the response coefficient r of dispatching of power netwoksobeyIt is set as 0.6.Energy storage and electronic
Remaining parameter of automobile cluster is shown in Tables 1 and 2 respectively.
1 energy storage parameter of table
2 electric vehicle collection swarm parameter of table
Isolated island division result based on energy constraint is shown in Fig. 4.In figure, when being divided due to monochromatic light electricity storage station isolated island, light storing up electricity
1 and 3 corresponding isolated islands of standing have intersection, therefore node 4,5 and 36 is converted into an equivalent node by isolated island fusion.To Fig. 4
In isolated island Island 1-4 carry out power dispatching inspection respectively, inspection result is shown in Table 3.
Power dispatching inspection result in 3 isolated island of table
For Island 4, the criterion corresponding with formula 23 provided above is invalid；For Island 4, with formula 23
Corresponding criterion is set up, and corresponding restricted model is separately added into, and carries out isolated island division again.
The power as shown in formula 4-24 is added in the isolated island partitioning model of light electricity storage station PV5/BE5 and supports constraint formula,
tunTake 14:15；Energy transfer constraint is added in the isolated island partitioning model of light electricity storage station PV2/BE2, carries out isolated island division again,
The result that revised upper layer isolated island partitioning model solves is shown in Fig. 5, and the range of original isolated island is indicated by the dashed box in figure, repaiies
Isolated island range after just is indicated with solid box.Power dispatching inspection is carried out to revised isolated island again, is obtained for each orphan
Island EunValue is 0, that is, is upchecked, and isolated island partition process is terminated.
Each serial number in above-described embodiment is for illustration only, the assembling for not representing each component or the elder generation during use
Sequence afterwards.
Example the above is only the implementation of the present invention is not intended to limit the invention, all in the spirit and principles in the present invention
Within, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (8)
1. the isolated island division methods based on energy constraint, which is characterized in that the isolated island division methods, including：
Determine the energy parameter in isolated island to be divided；
Based on energy constraint condition, the optimal isolated island partitioning model with each light electricity storage station in network system is established；
Established optimal Isolate model is solved, isolated island range corresponding with each light electricity storage station is got, there will be
The isolated island range of intersection carries out fusion treatment, obtains the isolated island of not intersection；
Power dispatching verification is carried out to the isolated island of obtained not intersection and exports isolated island if verified by power dispatching
Range terminates isolated island and divides.
2. the isolated island division methods according to claim 1 based on energy constraint, which is characterized in that the isolated island division side
Method further includes：
If do not verified by power dispatching, re-establishes and divide mould with the optimal isolated island of each light electricity storage station in network system
The step of type, progress model solution, power dispatching are examined.
3. the isolated island division methods according to claim 1 based on energy constraint, which is characterized in that the determination is to be divided
Energy parameter in isolated island, including：
The energy parameter includes the energy indexes of load, battery energy storage system, photovoltaic generating system and electric vehicle cluster；
EBE,i=SOCBE,i(Ts)·CBE,i (1)
Wherein, EBE,i, EPV,i, EEV,iAnd EL,iRespectively battery energy storage system, photovoltaic generating system and electric vehicle cluster and negative
The energy indexes of lotus, TsAnd TeThe initial time and end time that respectively isolated island divides；I is node serial number, SOCBE,iIt is saved for i
The residual power percentage of point battery energy storage system, SOCEV,i,jFor in i-node electric vehicle cluster, jth batteries of electric automobile
Residual power percentage, CBE,iAnd CEVThe respectively capacity of the capacity of battery energy storage system and single amount batteries of electric automobile；PL,i
(t) and PPV,i(t) be respectively t moment i-node load and photovoltaic system maximum active power output, NEV,iFor i-node electric vehicle
The number of electric vehicle in cluster；
The energy indexes of network node are defined as follows：
Ei=EBE,i+EL,i+EPV,i+EEV,i (5)
Wherein, EiFor the energy indexes of node i.
4. the isolated island division methods according to claim 1 based on energy constraint, which is characterized in that described to be based on energy about
Beam condition establishes the optimal isolated island partitioning model with each light electricity storage station in network system, including：
x0=1 (8)
xi∈ { 0,1 } i=1,2 ... n (9)
Wherein, light electricity storage station access node number is 0, { xiIt is that binary system controls variable, when i-node is powered in light electricity storage station
Isolated island in when, xiValue is 1, and no person's value is 0, diThe weight of load, a are accessed for i-nodeiIt is when No. 0 node is set as root section
When point, the corresponding father node of i-node.
5. the isolated island division methods according to claim 1 based on energy constraint, which is characterized in that described to established
Optimal Isolate model is solved, and gets isolated island range corresponding with each light electricity storage station, there will be the isolated island ranges of intersection
Fusion treatment is carried out, the isolated island of not intersection is obtained, including：
With software YALMIP direct solutions；When carrying out isolated island division to one of light electricity storage station, remaining light electricity storage station energy
Figureofmerit is set as 0；Fusion has the isolated island method of intersection as follows：By the node and light where the light electricity storage station having in the isolated island of intersection
All nodes that storing up electricity tiny node is connected on path are fused into an equivalent node, and the energy indexes of equivalent node are：
Wherein, areaA is indicated in the isolated island of intersection, the collection of all nodes on light storing up electricity tiny node and connected exclusive path
It closes, EEn,AIt is the energy indexes of equivalent node；
Removing has the isolated island division result of intersection, and equivalent node is considered as new light storing up electricity tiny node and carries out isolated island range to it
Determination；The process of isolated island fusion is repeated, until all isolated islands do not have intersection.
6. the isolated island division methods according to claim 1 based on energy constraint, which is characterized in that described to having obtained
There is no the isolated island of intersection to carry out power dispatching verification, including：
Power dispatching testing model is as follows：
EBE,i(t+ Δs t)=EBE,i(t)-PBE,i(t)·Δt (19)
EEV,i(t+ Δs t)=EEV,i(t)-PEV,i(t)·Δt (20)
0≤EBE,i(t)≤CBE,i (21)
0≤EEV,i(t)≤NEV,i·CEV (22)
Wherein, PBEAnd PEVVariable in order to control indicates the power of battery energy storage and electric vehicle, P respectivelyun(t) it is t moment isolated island
Interior missing power, PEV,i(t) it is the power of the electric vehicle cluster of t moment i-node access, calculation expression is (15),
PBE,i(t) power of battery energy storage is accessed for t moment i-node, Ω is the set of isolated island interior nodes, Pmax BE, ch, i and Pmax
BE, dis, i are constant, respectively the energy-storage system maximum charge power and maximum discharge power of expression i-node access, Pmax EV,
Ch and Pmax EV, dis are constant, indicate the maximum charge power and maximum discharge power of single amount electric vehicle, n respectivelych,i
(t) and ndis,i(t) it is respectively the electric vehicle cluster number to charge of t moment i-node access and the number to discharge, nch,i(t)
And ndis,i(t) the upper bound is calculated by formula (16) and (17) respectively, robeyElectric vehicle during user side demand response
Response coefficient, reaction automobile user responsiveness that dispatching of power netwoks is instructed, EEV,i(t) and EBE,i(t) when being respectively t
Carve the remaining capacity of the EV clusters and battery energy storage system of i-node access.
7. the isolated island division methods according to claim 6 based on energy constraint, which is characterized in that the isolated island division side
Method further includes：
Power dispatching model business software such as YALMIP direct solutions judge power tune if objective function optimization result is 0
Degree is upchecked；Otherwise judgement scheduling, which is examined, does not pass through.
8. the isolated island division methods according to claim 7 based on energy constraint, which is characterized in that the isolated island division side
Method further includes：
Judge whether formula (23) is true, if formula (23) is set up, be determined as in isolated island that distributed resource power enabling capabilities are insufficient,
Otherwise it is determined as distributed resource energy transfer scarce capacity in isolated island：
The method being modified to isolated island partitioning model according to judging result is as follows：
When formula (23) are set up, when calculating P'un (t) to all moment first, and choosing corresponding when P'un (t) is maximized
It carves, is denoted as Tun, TunIt illustrates that load is more than the Extreme periods that PV contributes, adds TunThe power constraint at moment divides mould to isolated island
In type：
When formula (23) is invalid, in addition constraint (25)-(38) to isolated island partitioning model：
EBE,0(Ts)=SOCBE,0(Ts)·CBE,0 (25)
E′BE,0(T+ Δ T)=EBE,0(T)+PBE(t)·ΔT (27)
E′EV,all(T+ Δ T)=EEV,all(T)+PEV,all(t)·ΔT (28)
EEV,all(T+ Δ T)=min (NEV,all·CEV,E′EV,all(T+ΔT)) (34)
EBE,0(t)≥0 (35)
EEV,all(t)≥0 (36)
Wherein, EEV,all(t) it is the total electricity of moment t electric vehicle cluster storage, Nch,allIt is chargeable in electric vehicle cluster
The electric vehicle number upper limit, Ndis,allFor the transformation for the electric vehicle that can discharge in electric vehicle cluster.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109829599A (en) * | 2018-11-22 | 2019-05-31 | 合肥工业大学 | The assemblage classification method and device of power distribution network based on high proportion renewable energy |
| CN109829599B (en) * | 2018-11-22 | 2022-03-18 | 合肥工业大学 | Cluster division method and device for power distribution network based on high-proportion renewable energy |
| CN111260505A (en) * | 2020-02-13 | 2020-06-09 | 吴龙圣 | Big data analysis method and device based on power Internet of things and computer equipment |
| CN113036758A (en) * | 2021-03-29 | 2021-06-25 | 国网河北省电力有限公司经济技术研究院 | Power distribution network dynamic island division method and terminal equipment |
| CN117495610A (en) * | 2023-12-29 | 2024-02-02 | 国网湖北省电力有限公司经济技术研究院 | Electric automobile optical storage, charging and replacement integrated station optimization operation method, system and equipment |
| CN117495610B (en) * | 2023-12-29 | 2024-03-29 | 国网湖北省电力有限公司经济技术研究院 | Electric automobile optical storage, charging and replacement integrated station optimization operation method, system and equipment |
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