CN105429158B  The simplification constrained procedure of power swing is stabilized under a kind of Multiple Time Scales constraint  Google Patents
The simplification constrained procedure of power swing is stabilized under a kind of Multiple Time Scales constraint Download PDFInfo
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 CN105429158B CN105429158B CN201510939569.9A CN201510939569A CN105429158B CN 105429158 B CN105429158 B CN 105429158B CN 201510939569 A CN201510939569 A CN 201510939569A CN 105429158 B CN105429158 B CN 105429158B
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 238000000034 method Methods 0.000 title claims abstract description 12
 238000010606 normalization Methods 0.000 claims abstract description 15
 230000000087 stabilizing Effects 0.000 claims abstract description 13
 238000004364 calculation method Methods 0.000 claims description 14
 238000004422 calculation algorithm Methods 0.000 claims description 7
 238000001914 filtration Methods 0.000 claims description 6
 230000000875 corresponding Effects 0.000 claims description 4
 238000010192 crystallographic characterization Methods 0.000 claims 9
 230000005611 electricity Effects 0.000 claims 1
 230000000694 effects Effects 0.000 description 2
 238000005516 engineering processes Methods 0.000 description 2
 238000005457 optimization Methods 0.000 description 2
 230000001276 controlling effects Effects 0.000 description 1
 238000004146 energy storage Methods 0.000 description 1
 230000004048 modification Effects 0.000 description 1
 238000006011 modification reactions Methods 0.000 description 1
 238000004088 simulation Methods 0.000 description 1
 238000006467 substitution reactions Methods 0.000 description 1
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
 H02J3/24—Arrangements for preventing or reducing oscillations of power in networks

 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]

 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
 H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
Abstract
The simplification constrained procedure of power swing is stabilized under being constrained the invention discloses a kind of Multiple Time Scales.Problem is stabilized for Multiple Time Scales power swing, using a kind of Linear Mapping method, different time scales power swing index is mapped to same time scale successively, obtain the normalization fluctuation index of different time scales, take normalization fluctuation index in minimum value as the unique fluctuation index for stabilizing power swing optimal control, so reduce the amount of constraint for stabilizing power swing optimizing control models, realize the constraint simplification that power swing is stabilized under Multiple Time Scales constraint.
Description
Technical field
The invention belongs to new energy control field, and in particular to the letter of power swing is stabilized under a kind of Multiple Time Scales constraint
Change constrained procedure.
Background technology
Generation of electricity by new energy has obvious fluctuation and not known.Power swing scope is related to second level to differences such as hour levels
Time scale scope, when windpowered electricity generation largescale grid connection, Different Effects are brought to power system security, operation and control.Therefore electricity
Force system side can formulate Multiple Time Scales fluctuation index according to operation demand, to carrying out more times to new energy outputpower fluctuation
Dimensional constraints.But Multiple Time Scales fluctuation index does not contact directly each other, independently of each other, stabilizes power existing
Fluctuation amount of constraint can be increased in fluctuation optimizing control models, model solution is complicated, is not easy to solve convergence, while solve the time
It is long, it is unfavorable for controlling in real time.
The content of the invention
The purpose of the present invention is to stabilize power swing under constraining for Multiple Time Scales to provide a kind of simplified constrained procedure.The party
Method proposes a kind of Linear Mapping method first, and different time scales fluctuation index is mapped into same time scale, calculates and returns
After one change fluctuation index and then obtain uniquely fluctuating index, realize that Multiple Time Scales fluctuation constraint is reduced to single fluctuation constraint,
Reduced so that stabilizing power swing optimizing control models and solving difficulty.
To realize the purpose of foregoing invention, scheme is used by the present invention solves its technical problem：
The simplification constrained procedure of power swing is stabilized under a kind of Multiple Time Scales constraint, gathers new energy power output and reading
Joint power output is taken, calculates new energy power output change fluctuation tendency characterization value, and then calculate different time scales power
Characterization value is fluctuated, index is fluctuated in the normalization for then obtaining different time scales fluctuation index in same time scale, finally asks
The unique fluctuation index for stabilizing power swing must be used for, and be transferred to and stabilize power swing optimizing control models, realize more times
Power swing under dimensional constraints is stabilized.
In order to reduce influence of the new energy outputpower fluctuation to power system, Multiple Time Scales have been formulated in power system side
Index is fluctuated, the Multiple Time Scales constraint of described power swing is：The Multiple Time Scales fluctuation that power system side is formulated refers to
Mark, wherein time scale is followed successively by T from small to large ord_{1},T_{2},T_{3},...,T_{n}, it is corresponding fluctuation index be followed successively by λ_{1},λ_{2},
λ_{3},...,λ_{n}, n is time scale number；
Described collection new energy power output and read joint power output and be specially：Gather current t new energy
Power outputWith reading [t (T_{n} Δ T), t] joint power output historical data in the period, wherein Δ T is stabilizes power
Fluctuate optimized algorithm and call the cycle；
Described calculating new energy power output changes fluctuation tendency characterization value：Because stabilizing power swing optimization control
System is to be based on firstorder filtering algorithm, so according to firstorder filtering characteristic, calculates power swing variation tendency characterization value dP；
Described calculating different time scales power swing characterization value is specially：According to changed power fluctuation tendency characterization value
DP, different time scales T is calculated respectively_{2},T_{3},...,T_{n}Power swing characterization value
Described different time scales fluctuation index of obtaining is specially in the normalization fluctuation index of same time scale：Point
Different time scales T is not calculated_{2},T_{3},...,T_{n}Fluctuate index and T_{1}Mapping slope γ between time scale fluctuation index_{2},
γ_{3},...,γ_{n}；Further calculate different time scales T_{2},T_{3},...,T_{n}Fluctuation index is mapped to T_{1}Time scale is returned
One changes fluctuation index λ_{2,d},λ_{3,d},...,λ_{n,d}；
Described trying to achieve be specially for the unique fluctuation index for stabilizing power swing：Take in abovementioned normalization fluctuation index
Minimum value is as unique fluctuation index λ_{m}。
The calculation formula of described power swing variation tendency characterization value is as follows：
WhereinCombine power output for the t Δ T moment.
The calculation formula of described power swing characterization value is as follows:
In formula,Respectively [t (T_{i} Δ T), t] period joint power output is most
Big value and minimum value, P_{n,rated}For the rated power of generation of electricity by new energy,For the joint power output at k moment.
The calculation formula of described mapping slope is as follows：
γ_{i}=λ_{1}/λ_{i}, i=2,3 ..., n
The calculation formula of wherein normalization fluctuation index is as follows：
Wherein uniquely the calculation formula of fluctuation index is as follows：
λ_{m}=min { λ_{1,d},λ_{2,d},λ_{3,d},...,λ_{n,d}}。
The invention has the advantages that：The present invention uses a kind of Linear Mapping method first, obtains stabilizing power waves
Dynamic unique fluctuation index.Both Multiple Time Scales ripple index had been met, and Multiple Time Scales constraint is reduced to single constraint, reduced
The complexity of power swing optimizing control models is stabilized, improves its solving speed.Power system simultaneously is constrained power swing
Time scale it is more, this method obtain effect it is more obvious.
Brief description of the drawings
Fig. 1 is the simplification constrained procedure technology figure that power swing is stabilized under Multiple Time Scales constraint.
Embodiment
The present invention is further elaborated and illustrated with reference to the accompanying drawings and examples.Each embodiment in the present invention
Technical characteristic can carry out respective combination on the premise of not colliding with each other.
Combining power output in the present invention is：New energy power output and energy storage power output sum.
Stabilizing the simplification constrained procedure general principle of power swing under a kind of Multiple Time Scales constraint of the present invention is：Collection
New energy power output and reading joint power output, calculate new energy power output change fluctuation tendency characterization value, Jin Erji
Different time scales power swing characterization value is calculated, then obtains normalizing of the different time scales fluctuation index in same time scale
Change fluctuation index, finally try to achieve and stabilize power swing optimization control for stabilizing unique fluctuation index of power swing, and being transferred to
Simulation, realize that the power swing under Multiple Time Scales constraint is stabilized.Comprise the following steps that：
The Multiple Time Scales fluctuation index that power system side is formulated, wherein time scale are followed successively by from small to large ord
T_{1},T_{2},T_{3},...,T_{n}, it is corresponding fluctuation index be followed successively by λ_{1},λ_{2},λ_{3},...,λ_{n}, n is time scale number；When gathering current t
Carve new energy power outputWith reading [t (T_{n} Δ T), t] joint power output historical data in the period, wherein Δ T is
Stabilize power swing optimized algorithm and call the cycle；It is to be based on firstorder filtering algorithm because stabilizing power swing optimal control, so root
According to firstorder filtering characteristic, power swing variation tendency characterization value dP is calculated；Described power swing variation tendency characterization value
Calculation formula is as follows：
WhereinCombine power output for the t Δ T moment.
According to changed power fluctuation tendency characterization value dP, different time scales T is calculated respectively_{2},T_{3},...,T_{n}Power
Fluctuate characterization valueThe calculation formula of described power swing characterization value is as follows:
In formula,Respectively [t (T_{i} Δ T), t] period joint power output maximum
Value and minimum value, P_{n,rated}For the rated power of generation of electricity by new energy,For the joint power output at k moment.
Different time scales T is calculated respectively_{2},T_{3},...,T_{n}Fluctuate index and T_{1}Reflecting between time scale fluctuation index
Penetrate slope γ_{2},γ_{3},...,γ_{n}；The calculation formula of described mapping slope is as follows：
γ_{i}=λ_{1}/λ_{i}, i=2,3 ..., n
Further calculate different time scales T_{2},T_{3},...,T_{n}Fluctuation index is mapped to T_{1}The normalization of time scale
Fluctuate index λ_{2,d},λ_{3,d},...,λ_{n,d}；The calculation formula of wherein normalization fluctuation index is as follows：
Minimum value in abovementioned normalization fluctuation index is taken to fluctuate index λ as unique_{m}, λ_{m}=min { λ_{1,d},λ_{2,d},
λ_{3,d},...,λ_{n,d}}.By λ_{m}And be transferred to and stabilize power swing optimizing control models, realize the power under Multiple Time Scales constraint
Fluctuation is stabilized.
Embodiment
The present invention is specifically described method of the invention by taking windpowered electricity generation as an example below.
Fig. 1 presents application flow of the present invention in wind power fluctuation optimal control is stabilized.In embodiment,
Power system side proposes the fluctuation constraint of three time scales to wind power fluctuation, time scale by order from small to large according to
Secondary is 1 minute, and 5 minutes, 30 minutes, corresponding fluctuation index was 2%, 5%, 10%.
From the wind power 0.6P at 3600 seconds wind power's supervision system acquisition current times_{n,rated}Read with from database
Combine power output 0.58P at 3595 seconds_{n,rated}, wherein it is 5 seconds to stabilize the fluctuation optimized algorithm cycle.Wind power can be calculated
It is 1 to change fluctuation tendency characterization value.The joint power output from 1805 seconds to 3600 second in the period is read from database, wherein
It is 0.59P to combine power output at 3600 seconds_{n,rated}, 3305 seconds to 3600 seconds, the minimum joint of 1805 seconds to 3600 second periods
Power output is followed successively by 0.57P_{n,rated}、0.54P_{n,rated}, then obtain 5 minutes, 30 minutes wind powers fluctuation characterization value successively
For 2%, 5%.Then 5 minutes are calculated, 30 minutes fluctuation indexs are mapped to the mapping slope of 1 minutes yardstick and are followed successively by
0.4、0.2.And then can obtain 5 minutes, 30 minutes fluctuation index be mapped to 1 minutes yardstick normalization fluctuation index successively
For 1.2%, 1%.Finally, minimum value i.e. 1% in normalization fluctuation index is taken as unique fluctuation index, to be transferred to and stabilize windpowered electricity generation
Power swing optimizing control models.
Although present disclosure is discussed in detail by above preferred embodiment, but it should be appreciated that abovementioned
Description is not considered as limitation of the present invention.After those skilled in the art have read the above, for the present invention's
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (4)
1. the simplification constrained procedure of power swing is stabilized under a kind of Multiple Time Scales constraint, it is characterised in that collection new energy is defeated
Go out power and read joint power output, when calculating new energy power output change fluctuation tendency characterization value, and then calculating different
Between yardstick power swing characterization value, then obtain different time scales fluctuation index same time scale normalization fluctuation refer to
Mark, is finally tried to achieve for stabilizing unique fluctuation index of power swing, and is transferred to and is stabilized power swing optimizing control models, real
Power swing under existing Multiple Time Scales constraint is stabilized；
The Multiple Time Scales of described power swing are constrained to：The Multiple Time Scales fluctuation index that power system side is formulated, wherein
Time scale is followed successively by T from small to large ord_{1},T_{2},T_{3},...,T_{n}, it is corresponding fluctuation index be followed successively by λ_{1},λ_{2},λ_{3},...,λ_{n},
N is time scale number；
Described collection new energy power output and read joint power output and be specially：Gather current t new energy output
PowerWith reading [t (T_{n} Δ T), t] joint power output historical data in the period, wherein Δ T is stabilizes power swing
Optimized algorithm calls the cycle；
Described calculating new energy power output changes fluctuation tendency characterization value：It is because stabilizing power swing optimal control
Based on firstorder filtering algorithm, so according to firstorder filtering characteristic, power swing variation tendency characterization value dP is calculated；
Described calculating different time scales power swing characterization value is specially：According to changed power fluctuation tendency characterization value dP,
Different time scales T is calculated respectively_{2},T_{3},...,T_{n}Power swing characterization value
Described different time scales fluctuation index of obtaining is specially in the normalization fluctuation index of same time scale：Count respectively
Calculate different time scales T_{2},T_{3},...,T_{n}Fluctuate index and T_{1}Mapping slope γ between time scale fluctuation index_{2},
γ_{3},...,γ_{n}；Further calculate different time scales T_{2},T_{3},...,T_{n}Fluctuation index is mapped to T_{1}Time scale is returned
One changes fluctuation index λ_{2,d},λ_{3,d},...,λ_{n,d}；
Described trying to achieve be specially for the unique fluctuation index for stabilizing power swing：Take minimum in abovementioned normalization fluctuation index
Value is as unique fluctuation index λ_{m}。
2. the simplification constrained procedure of power swing is stabilized under Multiple Time Scales constraint as claimed in claim 1, it is characterised in that：
The calculation formula of described power swing variation tendency characterization value is as follows：
WhereinCombine power output for the t Δ T moment.
3. the simplification constrained procedure of power swing is stabilized under Multiple Time Scales constraint as claimed in claim 1, it is characterised in that：
The calculation formula of described power swing characterization value is as follows:
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In formula,Respectively [t (T_{i} Δ T), t] period joint power output maximum and
Minimum value, P_{n,rated}For the rated power of generation of electricity by new energy,For the joint power output at k moment.
4. the simplification constrained procedure of power swing is stabilized under Multiple Time Scales constraint as claimed in claim 1, it is characterised in that：
The calculation formula of described mapping slope is as follows：
γ_{i}=λ_{1}/λ_{i}, i=2,3 ..., n
The calculation formula of wherein normalization fluctuation index is as follows：
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Wherein uniquely the calculation formula of fluctuation index is as follows：
λ_{m}=min { λ_{1,d},λ_{2,d},λ_{3,d},...,λ_{n,d}}。
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CN102184475A (en) *  20110511  20110914  浙江大学  Optimizing and dispatching method for microgrid economical operation on basis of multiple time scale coordination 
CN102377248A (en) *  20111010  20120314  南方电网科学研究院有限责任公司  Method for optimizing capacity of energy storage system in case of fluctuation of smooth and renewable energy sources electricity generation output 
CN103427444A (en) *  20130516  20131204  新疆大学  Control method for reducing wind power gridconnected scheduling plan error 
CN104410092A (en) *  20141208  20150311  国网新疆电力公司经济技术研究院  Energy coordinated optimization method for multielement complementary new energy power generating system 
CN104659801A (en) *  20150319  20150527  国家电网公司  Method for acquiring motor with smooth power 

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 20151215 CN CN201510939569.9A patent/CN105429158B/en active IP Right Grant
Patent Citations (5)
Publication number  Priority date  Publication date  Assignee  Title 

CN102184475A (en) *  20110511  20110914  浙江大学  Optimizing and dispatching method for microgrid economical operation on basis of multiple time scale coordination 
CN102377248A (en) *  20111010  20120314  南方电网科学研究院有限责任公司  Method for optimizing capacity of energy storage system in case of fluctuation of smooth and renewable energy sources electricity generation output 
CN103427444A (en) *  20130516  20131204  新疆大学  Control method for reducing wind power gridconnected scheduling plan error 
CN104410092A (en) *  20141208  20150311  国网新疆电力公司经济技术研究院  Energy coordinated optimization method for multielement complementary new energy power generating system 
CN104659801A (en) *  20150319  20150527  国家电网公司  Method for acquiring motor with smooth power 
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