CN108448632A - The alternating current-direct current microgrid in a few days rolling optimal dispatching method of meter and energy storage charge state cycle - Google Patents
The alternating current-direct current microgrid in a few days rolling optimal dispatching method of meter and energy storage charge state cycle Download PDFInfo
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- H02J3/382—
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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
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
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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
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Abstract
The invention discloses a kind of meter and the alternating current-direct current microgrid in a few days rolling optimal dispatching methods of energy storage charge state cycle, include the following steps：Step 10）Obtain the operation plan a few days ago of alternating current-direct current microgrid；Step 20）The operating cost coefficient of each equipment and operation limit value in alternating current-direct current microgrid are obtained, step 10 is based on）Operation plan a few days ago establish the in a few days short term scheduling model of alternating current-direct current microgrid；Step 30）Based on step 10）With step 20）Establish the in a few days Real-Time Scheduling model of alternating current-direct current microgrid；Step 40）Solution procedure 20）With step 30）The alternating current-direct current microgrid of composition in a few days rolling optimal dispatching model obtains the in a few days operational plan of alternating current-direct current microgrid.This method considers the rolling optimization of in a few days Multiple Time Scales, and limits the whole story state-of-charge of energy storage, ensures the ability of energy storage round-robin scheduling, formulates rational alternating current-direct current microgrid in a few days traffic control plan.
Description
Technical field
The present invention relates to the energy management of micro-capacitance sensor and Optimum Scheduling Technology field, especially a kind of meter and the charged shape of energy storage
The alternating current-direct current microgrid in a few days rolling optimal dispatching method of state cycle.
Background technology
More and more regenerative resources access electric system by microgrid, and regenerative resource permeability carries significantly in power grid
Height, these regenerative resources greatly reduce environmental pollution, improve the economic benefit of power generation, however regenerative resource and nature
Condition is closely related, and stronger uncertain and prediction error brings huge challenge to the safety and economic operation of power grid.In advance
The time scale of survey is shorter, and source lotus precision of prediction is higher, therefore the operation plan a few days ago of long period scale can not be arrived in the period
It is directly used when coming, microgrid should suitably be adjusted according in a few days more accurate prediction data, for the implementing plan of microgrid
With execution.
Having in a few days rolling optimal dispatching, only comprising a time scale, regulating power is limited, while not yet considering each
The energy storage final states for rolling the period, can not ensure the cycle regulating power of energy-storage system.It diesel-driven generator start and stop state and two-way changes
There is coupling in stream device operating status, can not carry out real-time adjusting in a few days, therefore the optimum results a few days ago of the two in time
It is updated in a few days Optimized model as determining operation plan.
Invention content
The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, and provide it is a kind of meter and the charged shape of energy storage
The alternating current-direct current microgrid in a few days rolling optimal dispatching method of state cycle, this method propose comprising in a few days short-term and roll in real time excellent
Change scheduling model, defines that the energy storage whole story state in a few days dispatched, the initial state-of-charge of energy storage are the reality of current energy storage in model
Border state-of-charge, i.e. in a few days real-time optimum results, and the deviation penalty term of latter stage state-of-charge is increased in object function, it should
Restriction will in a few days dispatch with dispatch contact a few days ago, while in a few days real-time results will feed back in a few days short term scheduling, ensure that
Energy storage healthily charge and discharge cycles under prediction deviation.
The present invention uses following technical scheme to solve above-mentioned technical problem：
According to a kind of meter proposed by the present invention and the alternating current-direct current microgrid in a few days rolling optimal dispatching of energy storage charge state cycle
Method includes the following steps：
Step 10, the operation plan a few days ago for obtaining alternating current-direct current microgrid；
Step 20 obtains the operating cost coefficient of each equipment and operation limit value, the day based on step 10 in alternating current-direct current microgrid
Preceding operation plan establishes the in a few days short term scheduling model of alternating current-direct current microgrid；
Step 30, the in a few days Real-Time Scheduling model that alternating current-direct current microgrid is established based on step 10 and step 20；
The alternating current-direct current microgrid that step 40, solution procedure 20 and step 30 form in a few days rolling optimal dispatching model, is handed over
The in a few days operational plan of direct-current micro-grid.
As a kind of meter of the present invention and the alternating current-direct current microgrid in a few days rolling optimal dispatching of energy storage charge state cycle
Method advanced optimizes scheme, and in the step 10, the operation plan a few days ago of the alternating current-direct current microgrid of acquisition includes diesel-driven generator
The state plan of startup-shutdown a few days ago, the commutation states of the forward and reverse a few days ago plan of bi-directional inverter and the day of energy storage day part
Preceding state-of-charge plan.
As a kind of meter of the present invention and the alternating current-direct current microgrid in a few days rolling optimal dispatching of energy storage charge state cycle
Method advanced optimizes scheme, in the step 20, the operating cost coefficient of each equipment and operation in the alternating current-direct current microgrid of acquisition
Limit value include with wind turbine, photovoltaic, diesel-driven generator, energy storage, bi-directional inverter and the relevant all cost systems of alternating current-direct current load
Number and operation limit value, the scheduling meter a few days ago for the alternating current-direct current microgrid that acquired cost coefficient, operation limit value and step 10 are obtained
Draw the in a few days short term scheduling model for substituting into and establishing alternating current-direct current microgrid in following formula：
0≤PWT,h≤wh,0≤PPV,h≤ph (6)
Formula (1) is the object function of in a few days short term scheduling model；Formula (2)-(5) are in a few days short term scheduling model objective function
In each cost specific formula for calculation；Formula (6) constrains for the generated output of wind turbine and photovoltaic in a few days short term scheduling model；Formula
(7) power bound and Ramp Rate constraint are run for diesel-driven generator in a few days short term scheduling model；Formula (8)-(9) are in a few days
Energy storage maximum charge-discharge electric power and state-of-charge constraint in short term scheduling model；Formula (10)-(11) are in a few days short term scheduling model
The transducing power and power swing of middle bi-directional inverter constrain；The power that formula (12) cuts off for load in a few days short term scheduling model
Constraint；Formula (13)-(14) are the power-balance constraint of in a few days DC area and exchanging area in short term scheduling model；PWT,h、PPV,h、
PDE, h、WithRespectively in a few days wind turbine, photovoltaic, diesel oil are sent out in short term scheduling model
Motor, energy storage charging, energy storage electric discharge, the change of current of bi-directional inverter forward direction, the reversed change of current of bi-directional inverter, AC load excision and straight
Stream load cuts off operation power in the h periods, wherein bi-directional inverter from the change of current of alternating-current/direct-current be the positive change of current, from direct current
It is the reversed change of current to the change of current of exchange；For the fuel cost of diesel-driven generator； With
The respectively operation expense of diesel-driven generator, energy storage, bi-directional inverter, wind turbine and photovoltaic；WithFor the lotus of energy storage
Electricity condition deviation is punished and cost depletions；Power failure punishment cost is cut off for load；For the fuel cost of diesel-driven generator
Coefficient；NhFor in a few days short term scheduling period it is total when hop count, Δ h is the time interval of in a few days short term scheduling period；
aDEAnd bDEFor the oil consumption characteristic cost coefficient of diesel-driven generator；For the rated power of diesel-driven generator；For in step 10
The state plan of startup-shutdown a few days ago of the diesel-driven generator of acquisition,Indicate diesel-driven generator at the t periods a few days ago when value is 1
It indicates to be in shutdown status in open state, when value is 0；WithRespectively diesel oil
Generator, energy storage, bi-directional inverter, wind turbine and photovoltaic operation expense coefficient；For the state-of-charge deviation of energy storage
Punishment cost coefficient；S(Nh) be energy storage in NhThe state-of-charge of period；S (t) * be in step 10 energy storage that obtains in the t periods
State-of-charge plan a few days ago；For energy storage cost depletions coefficient；Power failure punishment cost coefficient is cut off for load；whAnd phFor
The power prediction value of wind turbine and photovoltaic in the h periods；WithTo run the upper limit value of power under diesel-driven generator open state
And lower limiting value,WithFor the rate limit value of lower climbing and upper climbing in the unit time period of diesel-driven generator；WithFor the maximum charge and discharge power limit value of energy storage；S (h) and S (h-1) is state-of-charge of the energy storage in h the and h-1 periods；
ηCAnd ηDFor energy storage efficiency for charge-discharge；SmaxAnd SminIt is energy storage in this scheduling to allow the upper lower limit value of state-of-charge, S (0) for energy storage
The initial state-of-charge in period；S (k) * be in step 10 energy storage that obtains in the state-of-charge plan a few days ago of k periods；It is step
The positive commutation states plan of the t periods obtained in rapid 10 bi-directional inverter a few days ago, 1 indicates that the t periods have the positive change of current, 0 table
Show that there is no the positive changes of current；It is the reversed commutation states plan of t periods for being obtained in step 10 bi-directional inverter a few days ago, 1
It indicates the t periods and there are the negative sense change of current, 0 indicates that the negative sense change of current is not present；WithIndicate bi-directional inverter forward and reverse
The operation power limit of the change of current,WithLower limiting value and upper limit value of the expression bi-directional inverter in adjacent time interval power swing；WithIt is the maximum load curtailment power limit of h period AC and DCs；WithFor bi-directional inverter
Forward and reverse change of current efficiency limit value；lac,hAnd ldc,hThe respectively power prediction value of AC load and DC load in the h periods.
As a kind of meter of the present invention and the alternating current-direct current microgrid in a few days rolling optimal dispatching of energy storage charge state cycle
Method advanced optimizes scheme, and in the step 30, cost coefficient and operation limit value, step 20 that step 20 is obtained are in a few days
The operation plan a few days ago that short term scheduling model and step 10 obtain substitutes into the in a few days Real-Time Scheduling that alternating current-direct current microgrid is established in following formula
Model：
0≤PWT,k≤wk,0≤PPV,k≤pk (20)
Formula (15) is the object function of in a few days Real-Time Scheduling model；Formula (16)-(19) are in a few days Real-Time Scheduling simulated target
The specific formula for calculation of each cost in function；Formula (20) is that in a few days the generated output of wind turbine and photovoltaic is about in Real-Time Scheduling model
Beam；Formula (21) runs power bound and Ramp Rate constraint for diesel-driven generator in a few days Real-Time Scheduling model；Formula (22)-
(23) it is energy storage maximum charge-discharge electric power in a few days Real-Time Scheduling model and state-of-charge constraint；Formula (24)-(25) are in a few days real
When scheduling model in bi-directional inverter transducing power and power swing constraint；Formula (26) is load in a few days Real-Time Scheduling model
The power constraint of excision；Formula (27)-(28) are the power-balance constraint of in a few days DC area and exchanging area in Real-Time Scheduling model；
PWT, k、PPV, k、PDE, k、WithRespectively in a few days wind turbine, light in Real-Time Scheduling model
Volt, diesel-driven generator, energy storage charging, energy storage electric discharge, the change of current of bi-directional inverter forward direction, the reversed change of current of bi-directional inverter, exchange are negative
Lotus cuts off and DC load cuts off the operation power in the k periods；NkFor in a few days Real-Time Scheduling period it is total when hop count, Δ k
For the time interval of in a few days Real-Time Scheduling period；S(Nk) be energy storage in NkThe state-of-charge of period；S (h) * are step 20)
In a few days short term scheduling state-of-charge plan of the middle energy storage in the h periods；wkAnd pkFor wind turbine and photovoltaic the k periods in a few days real-time work(
Rate predicted value；S (k) and S (k-1) is state-of-charge of the energy storage in k the and k-1 periods；WithBe exchange the k periods and
The maximum load curtailment power limit of direct current；lac,kAnd ldc,kRespectively AC load and DC load are pre- in the power of k periods
Measured value.
As a kind of meter of the present invention and the alternating current-direct current microgrid in a few days rolling optimal dispatching of energy storage charge state cycle
Method advanced optimizes scheme, in the step 40, the alternating current-direct current microgrid that step 20 and step 30 form in a few days is rolled excellent
Change scheduling model, calls solver CPLEX to iteratively solve the model using integer Optimization Modeling tool box YALMIP, obtain and hand over directly
Flow the in a few days operational plan of microgrid.
The present invention has the following technical effects using above technical scheme is compared with the prior art：
In a few days Multiple Time Scales Optimized Operation predicts that fluctuation carries out multilevel optimization's adjusting according to source lotus, rises to a certain extent
To the cushioning effect of power regulation, the wind of abandoning reduced in microgrid abandons light and load excision situation, reduces operating cost；In addition in nothing
In the in a few days scheduling model that energy storage whole story state limits, energy storage early period can abundant charge and discharge, but can not ensure next rolling period
The primary state electricity of energy storage, as the period elapses, energy storage multiple discharge to minimum state-of-charge, the regulating power of energy storage subsequent period
It is limited, cause whole service expense to greatly increase after accumulation, energy storage at this time can not also be restored to the charged of next day dispatching requirement
State.Energy storage whole story state constraint in this method can ensure the cycle regulating power of energy-storage system, improve system operation
Economy.
Description of the drawings
Fig. 1 is the flow chart of the embodiment of the present invention.
Fig. 2 is the topology diagram of alternating current-direct current microgrid in the embodiment of the present invention.
Fig. 3 operation plans for source lotus prediction power in the embodiment of the present invention and a few days ago；Wherein, (a) is the embodiment of the present invention
In in a few days short term scheduling source lotus power prediction nominal value, (b) be the in a few days source lotus power of Real-Time Scheduling in the embodiment of the present invention
It predicts nominal value, is (c) operation plan a few days ago of the alternating current-direct current microgrid obtained in the embodiment of the present invention.
Fig. 4 is the Optimized Operation result of the embodiment of the present invention；Wherein, (a) is the in a few days wind turbine of short term scheduling, photovoltaic, friendship
The optimum results of stream load and DC load are (b) the in a few days wind turbine, photovoltaic, AC load and DC load of Real-Time Scheduling
Optimum results are (c) the in a few days bi-directional inverter of short term scheduling, diesel-driven generator and the optimum results of energy storage, are (d) in a few days real
When the optimum results of bi-directional inverter, diesel-driven generator and energy storage dispatched.
Specific implementation mode
Below in conjunction with the accompanying drawings, the technical solution of the embodiment of the present invention is described further.
For in a few days rolling optimal dispatching, this method considers the Optimized Operation of multiple time scales, while to the energy storage whole story
State-of-charge is defined to ensure the circular flow of energy storage.
As shown in Figure 1, the embodiment of the method for the present invention, the topological structure of alternating current-direct current microgrid is as shown in Figure 2.This method includes
Following steps：
Step 10) obtains the operation plan a few days ago of alternating current-direct current microgrid；
Step 20) obtains the operating cost coefficient of each equipment and operation limit value in alternating current-direct current microgrid, is based on the day of step 10)
Preceding operation plan establishes the in a few days short term scheduling model of alternating current-direct current microgrid；
Step 30) is based on step 10) and step 20) establishes the in a few days Real-Time Scheduling model of alternating current-direct current microgrid；
Step 40) solution procedure 20) and step 30) composition alternating current-direct current microgrid in a few days rolling optimal dispatching model, obtain
The in a few days operational plan of alternating current-direct current microgrid.
Preferably, in the step 10), operation plan includes diesel-driven generator to the alternating current-direct current microgrid of acquisition a few days ago
The state plan of startup-shutdown a few days ago, the commutation states of the forward and reverse a few days ago plan of bi-directional inverter and the day of energy storage day part
Preceding state-of-charge plan.
Preferably, in the step 20), the operating cost coefficient and fortune of each equipment in the alternating current-direct current microgrid of acquisition
Row limit value include with wind turbine, photovoltaic, diesel-driven generator, energy storage, bi-directional inverter and the relevant all costs of alternating current-direct current load
The alternating current-direct current microgrid that acquired cost coefficient, operation limit value and step 10) obtain is dispatched meter by coefficient and operation limit value a few days ago
Draw the in a few days short term scheduling model for substituting into and establishing alternating current-direct current microgrid in following formula：
0≤PWT,h≤wh,0≤PPV,h≤ph (6)
Formula (1) is the object function of in a few days short term scheduling model；Formula (2)-(5) are in a few days short term scheduling model objective function
In each cost specific formula for calculation；Formula (6) constrains for the generated output of wind turbine and photovoltaic in a few days short term scheduling model；Formula
(7) power bound and Ramp Rate constraint are run for diesel-driven generator in a few days short term scheduling model；Formula (8)-(9) are in a few days
Energy storage maximum charge-discharge electric power and state-of-charge constraint in short term scheduling model；Formula (10)-(11) are in a few days short term scheduling model
The transducing power and power swing of middle bi-directional inverter constrain；The power that formula (12) cuts off for load in a few days short term scheduling model
Constraint；Formula (13)-(14) are the power-balance constraint of in a few days DC area and exchanging area in short term scheduling model.PWT, h、PPV, h、
PDE, h、WithRespectively in a few days wind turbine, photovoltaic, diesel oil are sent out in short term scheduling model
Motor, energy storage charging, energy storage electric discharge, the change of current of bi-directional inverter forward direction, the reversed change of current of bi-directional inverter, AC load excision and straight
Stream load cuts off operation power in the h periods, wherein bi-directional inverter from the change of current of alternating-current/direct-current be the positive change of current, from direct current
It is the reversed change of current to the change of current of exchange；For the fuel cost of diesel-driven generator； With
The respectively operation expense of diesel-driven generator, energy storage, bi-directional inverter, wind turbine and photovoltaic；WithFor the lotus of energy storage
Electricity condition deviation is punished and cost depletions；Power failure punishment cost is cut off for load；For the fuel cost of diesel-driven generator
Coefficient；NhFor in a few days short term scheduling period it is total when hop count, Δ h is the time interval of in a few days short term scheduling period；
aDEAnd bDEFor the oil consumption characteristic cost coefficient of diesel-driven generator；For the rated power of diesel-driven generator；For step 10)
The state plan of startup-shutdown a few days ago of the diesel-driven generator of middle acquisition,Indicate diesel-driven generator in the t periods a few days ago when value is 1
It indicates to be in shutdown status in open state, when value is 0；WithRespectively bavin
Fry dried food ingredients motor, energy storage, bi-directional inverter, wind turbine and photovoltaic operation expense coefficient；It is inclined for the state-of-charge of energy storage
Poor punishment cost coefficient；S(Nh) be energy storage in NhThe state-of-charge of period；S (t) * are the energy storage of acquisition in step 10) in the t periods
State-of-charge plan a few days ago；For energy storage cost depletions coefficient；Power failure punishment cost coefficient is cut off for load；whAnd ph
For wind turbine and photovoltaic the h periods power prediction value；WithTo run the upper limit of power under diesel-driven generator open state
Value and lower limiting value,WithFor the rate limit value of lower climbing and upper climbing in the unit time period of diesel-driven generator；WithFor the maximum charge and discharge power limit value of energy storage；S (h) and S (h-1) is state-of-charge of the energy storage in h the and h-1 periods；
ηCAnd ηDFor energy storage efficiency for charge-discharge；SmaxAnd SminIt is energy storage in this scheduling to allow the upper lower limit value of state-of-charge, S (0) for energy storage
The initial state-of-charge in period；S (k) * are a few days ago state-of-charge plan of the energy storage in the k periods of acquisition in step 10)；It is
The positive commutation states plan of the t periods obtained in step 10) bi-directional inverter a few days ago, 1 indicates that the t periods have a positive change of current, 0
Indicate that there is no the positive changes of current；It is the reversed commutation states plan of t periods for obtaining in step 10) bi-directional inverter a few days ago,
1, which indicates the t periods, there are the negative sense change of current, 0 indicates that the negative sense change of current is not present；WithIndicate bi-directional inverter forward direction and anti-
To the operation power limit of the change of current,WithLower limiting value and the upper limit of the expression bi-directional inverter in adjacent time interval power swing
Value；WithIt is the maximum load curtailment power limit of h period AC and DCs；WithFor the two-way change of current
Device forward and reverse change of current efficiency limit value；lac,hAnd ldc,hThe respectively power prediction of AC load and DC load in the h periods
Value.
Preferably, in the step 30), cost coefficient and operation limit value, step 20) that step 20) is obtained
In a few days short term scheduling model and the operation plan a few days ago that obtains of step 10) substitute into and establish the in a few days real of alternating current-direct current microgrid in following formula
When scheduling model：
0≤PWT,k≤wk,0≤PPV,k≤pk (20)
Formula (15) is the object function of in a few days Real-Time Scheduling model；Formula (16)-(19) are in a few days Real-Time Scheduling simulated target
The specific formula for calculation of each cost in function；Formula (20) is that in a few days the generated output of wind turbine and photovoltaic is about in Real-Time Scheduling model
Beam；Formula (21) runs power bound and Ramp Rate constraint for diesel-driven generator in a few days Real-Time Scheduling model；Formula (22)-
(23) it is energy storage maximum charge-discharge electric power in a few days Real-Time Scheduling model and state-of-charge constraint；Formula (24)-(25) are in a few days real
When scheduling model in bi-directional inverter transducing power and power swing constraint；Formula (26) is load in a few days Real-Time Scheduling model
The power constraint of excision；Formula (27)-(28) are the power-balance constraint of in a few days DC area and exchanging area in Real-Time Scheduling model.
PWT, k、PPV, k、PDE, k、WithRespectively in a few days wind turbine, light in Real-Time Scheduling model
Volt, diesel-driven generator, energy storage charging, energy storage electric discharge, the change of current of bi-directional inverter forward direction, the reversed change of current of bi-directional inverter, exchange are negative
Lotus cuts off and DC load cuts off the operation power in the k periods；NkFor in a few days Real-Time Scheduling period it is total when hop count, Δ k
For the time interval of in a few days Real-Time Scheduling period；S(Nk) be energy storage in NkThe state-of-charge of period；S (h) * are step 20)
In a few days short term scheduling state-of-charge plan of the middle energy storage in the h periods；wkAnd pkFor wind turbine and photovoltaic the k periods in a few days real-time work(
Rate predicted value；S (k) and S (k-1) is state-of-charge of the energy storage in k the and k-1 periods；WithBe exchange the k periods and
The maximum load curtailment power limit of direct current；lac,kAnd ldc,kRespectively AC load and DC load are pre- in the power of k periods
Measured value.
Preferably, in the step 40), the alternating current-direct current microgrid of step 20) and step 30) composition is in a few days rolled
Dynamic Optimal Operation Model calls solver CPLEX to iteratively solve the model, obtains using integer Optimization Modeling tool box YALMIP
The in a few days operational plan of alternating current-direct current microgrid.
The method of the embodiment of the present invention carries out the in a few days optimization tune of alternating current-direct current microgrid using Multiple Time Scales rolling optimization
Degree, in a few days rolling optimization is adjusted last layer optimum results according to more accurate prediction data, finally determines Real-Time Scheduling
Scheme.Multiple Time Scales rolling optimization can carry out prediction error multistage adjusting, and reduction abandons wind and abandons light and load excision phenomenon,
Increase energy storage final states penalty and ensure that energy storage recycles regulating power, obtains preferable economic benefit.
A specific embodiment is enumerated below.
Certain self alternating current-direct current microgrid structure is as shown in Fig. 2, be directed to microgrid development in a few days rolling optimal dispatching, in microgrid
Basic parameter it is as shown in table 1.
Basic parameter in 1 alternating current-direct current microgrid of table
The in a few days short-term and real-time source lotus power prediction value of this area's typical case's day is respectively such as (a) and (b) institute in Fig. 3
Show.Day part alternating current-direct current area maximum load curtailment power is predict nominal value 50%.(c) in Fig. 3 is that the friendship of acquisition is straight
Flow the operation plan a few days ago of microgrid.
To microgrid development, in a few days rolling optimal dispatching, optimum results are as shown in Figure 4.(a) and (b) in Fig. 4 is respectively
In a few days short-term and Real time optimal dispatch source lotus power optimization result.It can be seen that in a few days short-term and real-time rolling optimization can have
The power swing of tracking source lotus is imitated, in a few days scheduling, which occurs abandoning wind, abandons light and cutting load.
For (c) and (d) in Fig. 4, diesel-driven generator starts with the dusk period in the morning to be run, and wind-light storage is insufficient at this time
Think that alternating current-direct current load is powered；Night and noon extra scene are transferred to morning and by energy storage the dusk period；Two-wire transverter night
Between by the exchanging area power change of current to DC area, daytime is then opposite；Diesel-driven generator and bi-directional inverter operating status, day are not changed
It is interior to be fluctuated by adjusting equipment output to compensate source lotus power prediction.In a few days short-term and real-time rolling optimization is at upper one
Between in dimensional optimization result with the minimum target adjustment equipment power of operating cost to cope with source lotus prediction fluctuation, energy storage whole story shape
Modal constraint ensure that energy storage can be restored to certain state-of-charge while playing its regulating power, when ensureing that its is next
Section regulating power and recycle.
The basic principles, main features and advantages of the invention have been shown and described above.Those skilled in the art should
Understand, the present invention do not limited by above-mentioned specific embodiment, the description in above-mentioned specific embodiment and specification be intended merely into
One step illustrates the principle of the present invention, without departing from the spirit and scope of the present invention, the present invention also have various change and
It improves, these changes and improvements all fall within the protetion scope of the claimed invention.The scope of protection of present invention is wanted by right
Ask book and its equivalent thereof.
Claims (5)
1. a kind of alternating current-direct current microgrid in a few days rolling optimal dispatching method of meter and energy storage charge state cycle, which is characterized in that packet
Include following steps：
Step 10, the operation plan a few days ago for obtaining alternating current-direct current microgrid；
Step 20 obtains the operating cost coefficient of each equipment and operation limit value, the tune a few days ago based on step 10 in alternating current-direct current microgrid
The in a few days short term scheduling model of alternating current-direct current microgrid is established in degree plan；
Step 30, the in a few days Real-Time Scheduling model that alternating current-direct current microgrid is established based on step 10 and step 20；
The alternating current-direct current microgrid that step 40, solution procedure 20 and step 30 form in a few days rolling optimal dispatching model, obtains alternating current-direct current
The in a few days operational plan of microgrid.
2. the alternating current-direct current microgrid in a few days rolling optimal dispatching of a kind of meter according to claim 1 and energy storage charge state cycle
Method, which is characterized in that in the step 10, the operation plan a few days ago of the alternating current-direct current microgrid of acquisition includes the day of diesel-driven generator
Preceding startup-shutdown state plan, the commutation states of the forward and reverse a few days ago plan of bi-directional inverter and the lotus a few days ago of energy storage day part
Electricity condition plan.
3. the alternating current-direct current microgrid in a few days rolling optimal dispatching of a kind of meter according to claim 2 and energy storage charge state cycle
Method, which is characterized in that in the step 20, the operating cost coefficient of each equipment and operation limit value in the alternating current-direct current microgrid of acquisition
Include with the relevant all cost coefficients of wind turbine, photovoltaic, diesel-driven generator, energy storage, bi-directional inverter and alternating current-direct current load and
Limit value is run, the operation plan generation a few days ago for the alternating current-direct current microgrid that acquired cost coefficient, operation limit value and step 10 are obtained
Enter to establish the in a few days short term scheduling model of alternating current-direct current microgrid in following formula：
0≤PWT,h≤wh,0≤PPV,h≤ph (6)
Formula (1) is the object function of in a few days short term scheduling model；Formula (2)-(5) is in a few days short term scheduling model objective functions
The specific formula for calculation of each cost；Formula (6) constrains for the generated output of wind turbine and photovoltaic in a few days short term scheduling model；Formula (7)
Power bound and Ramp Rate constraint are run for diesel-driven generator in a few days short term scheduling model；Formula (8)-(9) are in a few days short
Energy storage maximum charge-discharge electric power and state-of-charge constraint in phase scheduling model；Formula (10)-(11) is in a few days short term scheduling models
The transducing power and power swing of bi-directional inverter constrain；Formula (12) be power that in a few days load is cut off in short term scheduling model about
Beam；Formula (13)-(14) are the power-balance constraint of in a few days DC area and exchanging area in short term scheduling model；PWT,h、PPV,h、PDE,h、WithRespectively in a few days wind turbine in short term scheduling model, photovoltaic, diesel-driven generator,
Energy storage charging, energy storage electric discharge, the change of current of bi-directional inverter forward direction, the reversed change of current of bi-directional inverter, AC load excision and direct current are negative
Lotus cuts off operation power in the h periods, wherein bi-directional inverter from the change of current of alternating-current/direct-current be the positive change of current, from direct current to friendship
The change of current of stream is the reversed change of current；For the fuel cost of diesel-driven generator； WithRespectively
For the operation expense of diesel-driven generator, energy storage, bi-directional inverter, wind turbine and photovoltaic；WithFor the charged shape of energy storage
State deviation is punished and cost depletions；Power failure punishment cost is cut off for load；For the fuel cost coefficient of diesel-driven generator；
NhFor in a few days short term scheduling period it is total when hop count, Δ h is the time interval of in a few days short term scheduling period；aDEAnd bDE
For the oil consumption characteristic cost coefficient of diesel-driven generator；For the rated power of diesel-driven generator；For what is obtained in step 10
The state plan of startup-shutdown a few days ago of diesel-driven generator,Indicate that diesel-driven generator is in booting in the t periods a few days ago when value is 1
State indicates to be in shutdown status when value is 0；WithRespectively diesel-driven generator,
Energy storage, bi-directional inverter, wind turbine and photovoltaic operation expense coefficient；For the state-of-charge deviation punishment cost of energy storage
Coefficient；S(Nh) be energy storage in NhThe state-of-charge of period；S (t) * are that the energy storage that obtains is a few days ago charged in the t periods in step 10
State plan；For energy storage cost depletions coefficient；Power failure punishment cost coefficient is cut off for load；whAnd phFor wind turbine and light
Lie prostrate the power prediction value in the h periods；WithTo run the upper limit value and lower limit of power under diesel-driven generator open state
Value,WithFor the rate limit value of lower climbing and upper climbing in the unit time period of diesel-driven generator；WithFor storage
The maximum charge and discharge power limit value of energy；S (h) and S (h-1) is state-of-charge of the energy storage in h the and h-1 periods；ηCAnd ηDFor storage
It can efficiency for charge-discharge；SmaxAnd SminIt is energy storage at the beginning of this dispatching cycle to allow the upper lower limit value of state-of-charge, S (0) for energy storage
Beginning state-of-charge；S (k) * be in step 10 energy storage that obtains in the state-of-charge plan a few days ago of k periods；It is to be obtained in step 10
The positive commutation states plan of the t periods taken bi-directional inverter a few days ago, 1 indicates that the t periods have the positive change of current, and 0 indicates to be not present
The positive change of current；It is the reversed commutation states plan of t periods for being obtained in step 10 bi-directional inverter a few days ago, 1 indicates the t periods
There are the negative sense change of current, 0 indicate that the negative sense change of current is not present；WithIndicate the fortune of the bi-directional inverter forward and reverse change of current
Row power limit,WithLower limiting value and upper limit value of the expression bi-directional inverter in adjacent time interval power swing；WithIt is the maximum load curtailment power limit of h period AC and DCs；WithFor bi-directional inverter forward and reverse
Change of current efficiency limit value；lac,hAnd ldc,hThe respectively power prediction value of AC load and DC load in the h periods.
4. the alternating current-direct current microgrid in a few days rolling optimal dispatching of a kind of meter according to claim 3 and energy storage charge state cycle
Method, which is characterized in that in the step 30, cost coefficient that step 20 is obtained and operation limit value, step 20 it is in a few days short
The operation plan a few days ago that phase scheduling model and step 10 obtain substitutes into the in a few days Real-Time Scheduling mould that alternating current-direct current microgrid is established in following formula
Type：
0≤PWT,k≤wk,0≤PPV,k≤pk (20)
Formula (15) is the object function of in a few days Real-Time Scheduling model；Formula (16)-(19) are in a few days Real-Time Scheduling model objective function
In each cost specific formula for calculation；Formula (20) constrains for the generated output of wind turbine and photovoltaic in a few days Real-Time Scheduling model；
Formula (21) runs power bound and Ramp Rate constraint for diesel-driven generator in a few days Real-Time Scheduling model；Formula (22)-(23)
It is constrained for energy storage maximum charge-discharge electric power in a few days Real-Time Scheduling model and state-of-charge；Formula (24)-(25) are in a few days to adjust in real time
Spend transducing power and the power swing constraint of bi-directional inverter in model；Formula (26) cuts off for load in a few days Real-Time Scheduling model
Power constraint；Formula (27)-(28) are the power-balance constraint of in a few days DC area and exchanging area in Real-Time Scheduling model；PWT,k、
PPV,k、PDE,k、WithRespectively in a few days wind turbine, photovoltaic, bavin in Real-Time Scheduling model
Fry dried food ingredients motor, energy storage charging, energy storage electric discharge, the change of current of bi-directional inverter forward direction, the reversed change of current of bi-directional inverter, AC load excision
The operation power in the k periods is cut off with DC load；NkFor in a few days Real-Time Scheduling period it is total when hop count, Δ k is one
The in a few days time interval of Real-Time Scheduling period；S(Nk) be energy storage in NkThe state-of-charge of period；S (h) * are energy storage in step 20)
In the in a few days short term scheduling state-of-charge plan of h periods；wkAnd pkIn a few days realtime power for wind turbine and photovoltaic in the k periods is predicted
Value；S (k) and S (k-1) is state-of-charge of the energy storage in k the and k-1 periods；WithBe k periods AC and DC most
Big load curtailment power limit；lac,kAnd ldc,kThe respectively power prediction value of AC load and DC load in the k periods.
5. the alternating current-direct current microgrid in a few days rolling optimal dispatching of a kind of meter according to claim 4 and energy storage charge state cycle
Method, which is characterized in that in the step 40, the alternating current-direct current microgrid that forms for step 20 and step 30 in a few days rolling optimization tune
Model is spent, calls solver CPLEX to iteratively solve the model using integer Optimization Modeling tool box YALMIP, it is micro- to obtain alternating current-direct current
The in a few days operational plan of net.
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