CN105870977A - Energy storage microgrid active control method allowing planned supply reduction of direct power supply - Google Patents
Energy storage microgrid active control method allowing planned supply reduction of direct power supply Download PDFInfo
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- CN105870977A CN105870977A CN201610291178.5A CN201610291178A CN105870977A CN 105870977 A CN105870977 A CN 105870977A CN 201610291178 A CN201610291178 A CN 201610291178A CN 105870977 A CN105870977 A CN 105870977A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
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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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Abstract
The invention discloses an energy storage microgrid active control method allowing planned supply reduction of a direct power supply. According to the method, an active microgrid system capable of realizing a storage and distribution integrated design minitype power distribution network control method is used as the core control object, charging and discharging of a 110 kv large-capacity energy storage array containing microgrid control nodes are managed in a unified mode in a power distribution network system environment achieving direct load supply by means of 110 kv, 10 kv and 400 v three-level power networks, active adjustment of injection efficiency of a power distribution network is achieved, and trace scheduling of a planned capacity curve for indicating reduction of power supply to a direct supply load is achieved on the premise that all or partial power supply node main transformers and energy storage capacity are sufficient. By the adoption of the method, intelligent distribution of the direct power supply to external power output and direct supply is achieved on the premise that the power supply reliability of the direct supply load is guaranteed to the maximum, unnecessary mutual power compensation is reduced, network loss is reduced, and the time for reliable power supply or all power supply nodes under the influence of the supply reduction plan is prolonged.
Description
Technical field
The invention belongs to power distribution network and microgrid field, be specifically related to a kind of allow the planned storage subtracting confession of direct-furnish power supply
Can microgrid Active Control Method.
Background technology
Along with the intermittent renewable energy networking ratio such as wind, light increases year by year, electrical network is allowed wind by energy-saving and emission-reduction pressure
The online of electricity, photovoltaic generation isopreference, the online share of extruding conventional electric power generation capacity, tradition thermal power plant year gas-to electricity hourage by
Year declines.A part of thermal power plant runs less than nominal output and has become normality, and some thermal power plant is for a long time as spinning reserve
Run, cause thermal power plant's operation difficulty, occur losing, cannot recouping the investment.
" Integral design Miniature power grid control method is joined in storage " of our company's earlier application (application number:
201510457657.5) and in deriving method, relevant control technology is had been realized in, it is allowed at the 400V(380-of power distribution network
420V) reliable parallel running energy storage array in supply node, the most in parallel also has wind-powered electricity generation, photovoltaic distributed generator unit,
And the scalable load such as electric automobile, air-conditioning, and peak load shifting can be played, improve the utilization rate of power distribution network facility, join in terminal
In electrical network, configuration exceedes the function of the load of former transformer capacity.
By above-mentioned thermal power plant via 110kV, 10kV and 400V(380-420V) etc. connected multi-voltage grade distribution system
Realize directly power supply (being called for short " load direct-furnish " or " direct-furnish ") near region load, thermal power plant's generating capacity utilization mistake can be solved
Low problem, but need above-mentioned thermal power plant to participate in peak regulation, standby operation once power transmission network, it is many that thermal power plant is likely not to have arrangement
Covolume amount ensures to power to direct-furnish load and electrical network simultaneously, occurs striving electricity situation, threatens bulk power grid and direct-furnish load place simultaneously
The power supply reliability of distribution system.
When distribution system includes containing microgrid supply node, and there is above-mentioned interim minimizing and supply direct-furnish load in thermal power plant
During capacitance (being called for short " load subtracts confession " or " subtracting confession ") demand, the generating of energy storage array, distributed generation unit in active microgrid
Capacity can play effective power adjustments ability, but because lacking corresponding control method, its ability can not get playing, and makes straight
Power supply source lacks the external generated energy of autonomous distribution and the ability of direct-furnish electricity under not affecting power supply reliability premise.
Summary of the invention
In order to overcome the shortcoming of above-mentioned technology, allow the planned energy storage subtracting confession of direct-furnish power supply it is desirable to provide a kind of
Microgrid Active Control Method, the method can ensure on the premise of direct-furnish load electricity consumption reliability, by powering joint to containing microgrid
The discharge and recharge of the energy storage array in point carries out centralized Control, by locking the tracking setting output power in subtracting for the plan period
Fixed, it is achieved the external generated energy of direct-furnish power supply and the autonomous distribution of direct-furnish electricity.
For reaching above-mentioned technical purpose and effect, the present invention is achieved through the following technical solutions:
A kind of planned energy storage microgrid Active Control Method subtracting confession of direct-furnish power supply that allows, the power distribution network environment bag that its work relies on
Including a 110kV AC network, described 110kV AC network is connected with power transmission network by a direct-furnish power supply, described 110kV AC network
Upper connection has several conventional 110kV supply node and several 110kV supply nodes Han microgrid；Described 110kV supplies containing microgrid
Electrical nodes includes a 10kV AC network, a main transformer and several be connected on described 10kV AC network
400V passive power distribution node and several 400V storages being connected on described 10kV AC network are joined integrated design microgrid and are powered joint
Point, described 10kV AC network is connected with described 110kV AC network by described main transformer；
Described 400V storage is joined and is included a 400V AC network, first transformation in integrated design microgrid supply node
Device, energy storage array, distributed generation unit, the first conventional load and the first scalable load, a described 400V exchanges Netcom
Crossing described first transformator to be connected with described 10kV AC network, described energy storage array, described distributed generation unit are by PCS even
Receive a described 400V AC network, described first conventional load and described first scalable load and be connected directly between described respectively
On oneth 400V AC network；
Include a 2nd 400V AC network in described 400V passive power distribution node, the second transformator, second routine are born
Lotus and the second scalable load, described 2nd 400V AC network is connected with described 10kV AC network by described second transformator,
Described second conventional load and described second scalable load are connected on described 2nd 400V AC network；
The detailed process of the method is as follows:
1) 1 direct-furnish load subtracts for plan by subtracting for the time started, subtracting for the persistent period, subtract and form for phase average output power,
Direct-furnish load subtracts and can be proposed by the operator of described direct-furnish power supply for plan, and by including but not limited to that described 110kV is containing microgrid
Supply node performs in interior distribution operator；Multinomial direct-furnish load subtracts the execution period for plan must not be overlapping；
2) operator of described direct-furnish power supply formulate direct-furnish load subtract for plan before, should first determine subtract for the time started, subtract confession
Duration TPRAnd subtract for phase average output power PPR, alternative (TPR, PPR) acquisition methods that combines is as follows:
2.1) prediction is from subtracting for time started t1Play and subtract for any time phase t2Each supply node in distribution network system only
The net load curve of (conventional 110kV supply node or 110kV supply node Han microgrid, and as a example by node i)；
Any instantaneous net load of each supply node is the power merit with described distributed generation unit of described first conventional load
The difference of rate；
2.2) to each supply node (as a example by node i), calculate from subtracting for time started t1Play and subtract for any time phase t2
The prediction power consumption curve of each supply node only；And described energy storage array
Maximum available power；
2.3) to each supply node (as a example by node i), calculate from subtracting for time started t1Play and subtract for any time phase t2
The residue available power of described energy storage array only；Wherein,
Discharging efficiency for this energy storage array；
2.4) rightAdd up its residue available power being denoted as the supply node of positive number；RightAdd up its residue available power being denoted as the node of negative；
2.5) described direct-furnish power supply need to subtract for time started t1Play and subtract for any time phase t2Only, join to direct-furnish load place
The minimum amount of power that electrical network injects；Wherein,The average efficiency helped mutually for power between microgrid,
The average efficiency powered for direct-furnish power supply；WhenLess than 0, set by forceIt is 0；Therefore subtract for phase duration TPRFor t2-
t1；Average output power PPRFor；
3) when at optional (TPR, PPR) combination selects 1 by default after setting value, to TPRSuitable minimizing, and to PPR
Suitable increase, do not interfere with direct-furnish load and subtract the reasonability for plan；On the contrary, to T on the basis of this default setting valuePRCarry out
Increase, or to PPRReduce, the power supply reliability of direct-furnish load may be jeopardized；
4), when being subtracted for project impact by 1 direct-furnish load, the running status defining now distribution network system is power supply constrained state,
Otherwise for unrestricted state of powering；When distribution network system is in power supply constrained state, described 400V(380-420V) Chu Peiyi
Bodyization design microgrid node and described 400V(380-420V) scalable load in passive power distribution node is disabling, excise or
Reduce exert oneself 0 state；When distribution network system is in power supply constrained state, described 400V(380-420V) store up and join integration
Design microgrid node follows the steps below energy storage charge and discharge and dispatches:
4.1) net load of each supply node (as a example by node i) in prediction subsequent time distribution network system, and this confession
The EIAJ of energy storage array described in electrical nodes；Calculate the imbalance power of this supply node；If imbalance powerMaximum less than this supply node main transformer
CapacityOpposite number, set；If imbalance powerSave more than this power supply
Point main transformer heap(ed) capacity, set；Subsequent time differs the Δ t time with current time；
4.2) to imbalance powerFor the supply node of nonnegative number, its imbalance power cumulative is also denoted as Psuf；Right
Imbalance powerFor the supply node of negative, its imbalance power cumulative is also denoted as Preq；
4.3) for meeting the need for electricity of direct-furnish load subsequent time prediction, direct-furnish power supply need to be noted to direct-furnish load place power distribution network
The minimum power entered；Definition general power vacancy；
4.4) if general power vacancyNot less than 0, the described energy storage array of the most each supply node is all set as putting by EIAJ
Electricity；If general power vacancyLess than 0, then the power of the described energy storage array of each supply node (as a example by node i)Can
Suitably reduce, the power of described energy storage arrayInitial value by following power distribution computational methods determine, the method includes
But it is not limited to proportional allocations method, willIt is set as；It is more than
0 represents electric discharge,Charging is represented less than 0；The described energy storage array of each supply node is determined according to setting value and actual charge condition
Fixed final charge and discharge power, its principle be meet under described energy storage array electricity bound constraints as close possible toIf
Definite value；
4.5) if general power vacancyLess than 0, and at the power of described energy storage arrayInitial value set lower direct-furnish power supply
The actual power injected to direct-furnish load place power distribution networkIt is not equal to PPRTime, can use and include but not limited to based on line
Sex ratio integrator, with PPRFor reference value, withFor treating that the feedback of control value is to obtain suitable reference valueTo replace in the 4.4th step power distribution computational methods, iteration completes tracking lock PPRPower accurately control；
4.6) set a period of time Δ T within, the actual electricity that direct-furnish power supply injects to direct-furnish load place power distribution network andDifference if greater than set positive number, then reflect that the energy storage of the distribution network system at direct-furnish load place is total
Body discharge capability tends to nervous, the dispatching party of plan should be supplied to point out above-mentioned warning information to being responsible for subtracting；Dispatching party can be adjusted
WholeSetting value with control alarm sensitivity level；Dispatching party can decide whether that terminating or change direct-furnish bears upon receipt
Lotus subtracts for plan.
Further, the operational voltage level of described power transmission network is at more than 110kV；Step 2.1) in, it was predicted that from subtracting for opening
Time beginning t1Play and subtract for any time phase t2The net load curve of each supply node in distribution network system only,
And step 4.1) in, it was predicted that the net load of each supply node in subsequent time distribution network systemMethod include but not
It is limited to each type load and wind power generation, the prediction algorithm of exerting oneself of photovoltaic generation；Step 2.1) in, described distributed generation unit bag
Include but be not limited to wind power generation form, photovoltaic generation form or diesel generation form.
Beneficial effects of the present invention is as follows:
1, the present invention is capable of the active regulation of power distribution network injecting power, in all or part of supply node main transformer and storage
On the premise of energy capacity is enough, it is achieved direct-furnish load is reduced supply of electric power and is planned out the trace scheduling of force curve；
2, the present invention can be on the premise of ensureing direct-furnish load power supply reliability to greatest extent, it is achieved direct-furnish power supply is to outgoing
Smart allocation on electricity and direct-furnish electricity；
3, the present invention can consider power transmission efficiency in optimizing scheduling, utilizes the power between supply node to help mutually the most when necessary,
Reduce the network loss in direct-furnish electrical network, and extend all supply nodes by the time of reliable power supply when subtracting for project impact simultaneously.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of description, below with presently preferred embodiments of the present invention and coordinate accompanying drawing describe in detail as after.
The detailed description of the invention of the present invention is shown in detail in by following example and accompanying drawing thereof.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this
Bright schematic description and description is used for explaining the present invention, is not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is that the present invention works the distribution network system environment relied on, i.e. 400V-110kV joins the company of microgrid supply node group containing storage
Access node structure and energy flow graph；
Fig. 2 is that the 400V-110kV of the present invention joins microgrid supply node group's power control procedures figure containing storage；
Fig. 3 is that the 400V (380-420V) of the present invention stores up the electrical connection diagram joining integration microgrid supply node；
Fig. 4 is the electrical connection diagram of the adjustable distribution system of 400V (380-420V) load capacity of the present invention；
Fig. 5 is the direct-furnish external generated energy of power supply based on PI controller and the distribution feedback control signal of direct-furnish electricity intelligent power
Figure.
Label declaration in figure: 1,110kV AC network；2, direct-furnish power supply；3, power transmission network；4, conventional 110kV supply node；5、
110kV supply node Han microgrid；6,10kV AC network；7, main transformer；8,400V passive power distribution node；9, one is joined in 400V storage
Change design microgrid supply node；10, a 400V AC network；11, the first transformator；12, energy storage array；13, distributed power generation
Unit；14, the first conventional load；15, the first scalable load；16, the 2nd 400V AC network；17, the second transformator；18,
Two conventional loads；19, the second scalable load；20、PCS；21, PI controller.
Detailed description of the invention
Below with reference to the accompanying drawings and in conjunction with the embodiments, the present invention is described in detail.
Shown in Figure 1, a kind of allow the planned energy storage microgrid Active Control Method subtracting confession of direct-furnish power supply, its work depends on
The power distribution network environment relied includes a 110kV AC network 1, and described 110kV AC network 1 is by a direct-furnish power supply 2 and power transmission network 3
Connecting, the operational voltage level of described power transmission network 3, at more than 110kV, described 110kV AC network 1 connects and has several conventional
110kV supply node 4 and several 110kV is containing microgrid supply node 5；Described 110kV includes one containing in microgrid supply node 5
6, main transformer 7 of individual 10kV AC network and several 400V passive power distribution joints being connected on described 10kV AC network 6
Integrated design microgrid supply node 9, described 10kV are joined in point 8 and several 400V storages being connected on described 10kV AC network 6
AC network 6 is connected with described 110kV AC network 1 by described main transformer 7；
Shown in Figure 3, described 400V storage is joined and is included a 400V AC network in integrated design microgrid supply node 9
10, first transformator 11, energy storage array 12, distributed generation unit the 13, first conventional load 14 and the first scalable are born
Lotus 15, a described 400V AC network 10 is connected with described 10kV AC network 6 by described first transformator 11, described energy storage battle array
Row 12, described distributed generation unit 13 are connected to a described 400V AC network 10 by PCS 21, described first routine is born
Lotus 14 and described first scalable load 15 are connected directly between on a described 400V AC network 10 respectively；
Shown in Figure 4, described 400V passive power distribution node 8 includes 16, one second change of a 2nd 400V AC network
Depressor the 17, second conventional load 18 and the second scalable load 19, described 2nd 400V AC network 16 is by described second transformation
Device 17 is connected with described 10kV AC network 6, and described second conventional load 18 and described second scalable load 19 are connected to
On described 2nd 400V AC network 16.
Shown in Figure 2, the detailed process of the method for the present invention is as follows:
1) 1 direct-furnish load subtracts for plan by subtracting for the time started, subtracting for the persistent period, subtract and form for phase average output power,
Direct-furnish load subtracts and can be proposed by the operator of described direct-furnish power supply 2 for plan, and by including but not limited to that described 110kV is containing microgrid
Supply node 5 performs in interior distribution operator；Multinomial direct-furnish load subtracts the execution period for plan must not be overlapping；
2) operator of described direct-furnish power supply 2 formulate direct-furnish load subtract for plan before, should first determine subtract for the time started, subtract confession
Duration TPRAnd subtract for phase average output power PPR, alternative (TPR, PPR) acquisition methods that combines is as follows:
2.1) prediction is from subtracting for time started t1Play and subtract for any time phase t2Each supply node in distribution network system only
The net load curve of (conventional 110kV supply node or 110kV supply node Han microgrid, and as a example by node i)；
This Forecasting Methodology includes but not limited to each type load and wind, light generated output prediction algorithm etc.；Each supply node is any instantaneous
The difference of power of the power that net load is described first conventional load 14 and described distributed generation unit 13；Described distributed
Generator unit 13 includes but not limited to the forms such as wind power generation, photovoltaic generation or diesel generation；
2.2) to each supply node (as a example by node i), calculate from subtracting for time started t1Play and subtract for any time phase t2
The prediction power consumption curve of each supply node only；And described energy storage array
The maximum available power of 12；
2.3) to each supply node (as a example by node i), calculate from subtracting for time started t1Play and subtract for any time phase t2
The residue available power of described energy storage array 12 only；Wherein,Discharging efficiency for this energy storage array；
2.4) rightAdd up its residue available power being denoted as the supply node of positive number；RightAdd up its residue available power being denoted as the node of negative；
2.5) described direct-furnish power supply 2 need to subtract for time started t1Play and subtract for any time phase t2Only, to direct-furnish load place
The minimum amount of power that power distribution network injects；Wherein,The average efficiency helped mutually for power between microgrid,The average efficiency powered for direct-furnish power supply；WhenLess than 0, set by forceIt is 0；Therefore subtract for phase duration TPRFor
t2-t1；Average output power PPRFor；
3) when at optional (TPR, PPR) combination selects 1 by default after setting value, to TPRSuitable minimizing, and to PPR
Suitable increase, do not interfere with direct-furnish load and subtract the reasonability for plan；On the contrary, to T on the basis of this default setting valuePRCarry out
Increase, or to PPRReduce, the power supply reliability of direct-furnish load may be jeopardized；
4), when being subtracted for project impact by 1 direct-furnish load, the running status defining now distribution network system is power supply constrained state,
Otherwise for unrestricted state of powering；When distribution network system is in power supply constrained state, described 400V(380-420V) Chu Peiyi
Bodyization design microgrid node 9 and described 400V(380-420V) scalable load in passive power distribution node 8 is disabling, excises
Or reduce exert oneself 0 state；When distribution network system is in power supply constrained state, described 400V(380-420V) store up and join one
Change design microgrid node 9 follows the steps below energy storage charge and discharge to be dispatched:
4.1) net load of each supply node (as a example by node i) in prediction subsequent time distribution network system, and this confession
The EIAJ of energy storage array 12 described in electrical nodes；This Forecasting Methodology includes but not limited to each type load and wind, light
Volt generated output prediction algorithm etc.；Calculate the imbalance power of this supply node；As
Really imbalance powerLess than this supply node main transformer heap(ed) capacityOpposite number, set；If imbalance powerMore than this supply node main transformer heap(ed) capacity, set；Subsequent time differs the Δ t time with current time；
4.2) to imbalance powerFor the supply node of nonnegative number, its imbalance power cumulative is also denoted as Psuf；Right
Imbalance powerFor the supply node of negative, its imbalance power cumulative is also denoted as Preq；
4.3) for meeting the need for electricity of direct-furnish load subsequent time prediction, direct-furnish power supply need to be noted to direct-furnish load place power distribution network
The minimum power entered；Definition general power vacancy；
4.4) if general power vacancyNot less than 0, the described energy storage array 12 of the most each supply node is all set as by EIAJ
Electric discharge；If general power vacancyLess than 0, then the power of the described energy storage array 12 of each supply node (as a example by node i)Can suitably reduce, the power of described energy storage array 12Initial value by following power distribution computational methods determine, should
Method includes but not limited to proportional allocations method, willIt is set as；Electric discharge is represented more than 0,Charging is represented less than 0；The described energy storage array 12 of each supply node is according to setting value and reality
Charge condition determines final charge and discharge power, and its principle is to meet to use up under described energy storage array 12 electricity bound constraints
May be close toSetting value；
4.5) if general power vacancyLess than 0, and at the power of described energy storage array 12Initial value set lower direct power supply
The actual power that source is injected to direct-furnish load place power distribution networkIt is not equal to PPRTime, can use and include but not limited to such as Fig. 5
Shown, based on PI linear scale integrator, with PPRFor reference value, withFor treating that the feedback of control value takes
Obtain suitable reference valueTo replace in the 4.4th step power distribution computational methods, iteration completes tracking lock PPR's
Power accurately controls；
4.6) set a period of time Δ T within, the actual electricity that direct-furnish power supply injects to direct-furnish load place power distribution network andDifference if greater than set positive number, then reflect that the energy storage of the distribution network system at direct-furnish load place is total
Body discharge capability tends to nervous, the dispatching party of plan should be supplied to point out above-mentioned warning information to being responsible for subtracting；Dispatching party can be adjusted
WholeSetting value with control alarm sensitivity level；Dispatching party can decide whether that terminating or change direct-furnish bears upon receipt
Lotus subtracts for plan.
Fig. 5 be the direct-furnish external generated energy of power supply based on PI controller and direct-furnish electricity intelligent power distribution feedback control show
It is intended to, wherein direct-furnish power distribution network injecting power reference value PPRBe actually implanted into power Preal_injControl as described PI after subtracting each other
The input signal of device 21, described PI controller arranges the upper and lower bound that output valve is floated, and described PI controller 21 is output as
Reference value Pex.ref, and send into the 4.4th step power distribution computing module.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, that is made any repaiies
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (2)
1. one kind allows the planned energy storage microgrid Active Control Method subtracting confession of direct-furnish power supply, it is characterised in that: its work relies on
Power distribution network environment include a 110kV AC network (1), described 110kV AC network (1) by a direct-furnish power supply (2) with defeated
Electrical network (3) connects, and the upper connection of described 110kV AC network (1) has several conventional 110kV supply node (4) and several 110kV
Containing microgrid supply node (5)；Described 110kV includes a 10kV AC network (6), a master containing in microgrid supply node (5)
Transformator (7) and several be connected to 400V passive power distribution node (8) on described 10kV AC network (6) and several connect
Integrated design microgrid supply node (9) is joined in 400V storage on described 10kV AC network (6), and described 10kV AC network (6) is led to
Cross described main transformer (7) to be connected with described 110kV AC network (1)；
Described 400V storage join integrated design microgrid supply node (9) includes a 400V AC network (10), one
First transformator (11), energy storage array (12), distributed generation unit (13), the first conventional load (14) and the first scalable are negative
Lotus (15), a described 400V AC network (10) is connected with described 10kV AC network (6) by described first transformator (11), institute
State energy storage array (12), described distributed generation unit (13) passes through PCS(20) it is connected to a described 400V AC network (10)
Upper, described first conventional load (14) is connected directly between a described 400V respectively with described first scalable load (15) and exchanges
On net (10)；
Described 400V passive power distribution node (8) includes a 2nd 400V AC network (16), second transformator (17),
Second conventional load (18) and the second scalable load (19), described 2nd 400V AC network (16) passes through described second transformator
(17) being connected with described 10kV AC network (6), described second conventional load (18) and described second scalable load (19) are respectively
It is connected on described 2nd 400V AC network (16)；
The detailed process of the method is as follows:
1) 1 direct-furnish load subtracts for plan by subtracting for the time started, subtracting for the persistent period, subtract and form for phase average output power,
Direct-furnish load subtracts and can be proposed by the operator of described direct-furnish power supply (2) for plan, and by including but not limited to that described 110kV is containing micro-
Net supply node (5) performs in interior distribution operator；Multinomial direct-furnish load subtracts the execution period for plan must not be overlapping；
2) operator of described direct-furnish power supply (2) formulate direct-furnish load subtract for plan before, should first determine subtract for the time started, subtract
For duration TPRAnd subtract for phase average output power PPR, alternative TPRAnd PPRThe acquisition methods of combination is as follows:
2.1) prediction is from subtracting for time started t1Play and subtract for any time phase t2Each supply node in distribution network system only
Net load curve；Any instantaneous net load of each supply node is the power of described first conventional load (14)
Difference with the power of described distributed generation unit (13)；
2.2) to each supply node, calculate from subtracting for time started t1Play and subtract for any time phase t2Each power supply joint only
The prediction power consumption curve of point；And the maximum of described energy storage array (12) can use
Electricity；
2.3) to each supply node, calculate from subtracting for time started t1Play and subtract for any time phase t2Described energy storage battle array only
The residue available power of row (12)；Wherein,For this energy storage battle array
The discharging efficiency of row；
2.4) rightAdd up its residue available power being denoted as the supply node of positive number；RightAdd up its residue available power being denoted as the node of negative；
2.5) described direct-furnish power supply (2) need to subtract for time started t1Play and subtract for any time phase t2Only, to direct-furnish load place
The minimum amount of power that power distribution network injects；Wherein,The average efficiency helped mutually for power between microgrid,The average efficiency powered for direct-furnish power supply；WhenLess than 0, set by forceIt is 0；Therefore subtract for phase duration TPRFor
t2-t1；Average output power PPRFor；
3) when at optional TPRAnd PPRIn combination after selection 1 setting value by default, to TPRSuitable minimizing, and to PPR
Suitable increase, do not interfere with direct-furnish load and subtract the reasonability for plan；On the contrary, to T on the basis of this default setting valuePRCarry out
Increase, or to PPRReduce, the power supply reliability of direct-furnish load may be jeopardized；
4), when being subtracted for project impact by 1 direct-furnish load, the running status defining now distribution network system is power supply constrained state,
Otherwise for unrestricted state of powering；When distribution network system is in power supply constrained state, it is micro-that integrated design is joined in described 400V storage
Scalable load in net node (9) and described 400V passive power distribution node (8) is disabling, excise or reduce and exert oneself 0
State；When distribution network system is in power supply constrained state, described 400V storage joins integrated design microgrid node (9) according to following
Step carries out energy storage charge and discharge scheduling:
4.1) net load of each supply node in prediction subsequent time distribution network system, and store up described in this supply node
The EIAJ of energy array (12)；Calculate the imbalance power of this supply node；If imbalance powerMaximum less than this supply node main transformer
CapacityOpposite number, set；If imbalance powerSave more than this power supply
Point main transformer heap(ed) capacity, set；Subsequent time differs the Δ t time with current time；
4.2) to imbalance powerFor the supply node of nonnegative number, its imbalance power cumulative is also denoted as Psuf；Right
Imbalance powerFor the supply node of negative, its imbalance power cumulative is also denoted as Preq；
4.3) for meeting the need for electricity of direct-furnish load subsequent time prediction, direct-furnish power supply need to be noted to direct-furnish load place power distribution network
The minimum power entered；Definition general power vacancy；
4.4) if general power vacancyNot less than 0, the described energy storage array (12) of the most each supply node is all set as going out by maximum
Power is discharged；If general power vacancyLess than 0, then the power of the described energy storage array (12) of each supply nodeCan suitably subtract
Few, the power of described energy storage array (12)Initial value by following power distribution computational methods determine, the method include but
It is not limited to proportional allocations method, willIt is set as；More than 0
Represent electric discharge,Charging is represented less than 0；The described energy storage array (12) of each supply node is according to setting value and actual electricity feelings
Condition determines final charge and discharge power, and its principle is to meet under described energy storage array (12) electricity bound constraints as far as possible
CloseSetting value；
4.5) if general power vacancyLess than 0, and at the power of described energy storage array (12)Initial value set lower direct-furnish
The actual power that power supply injects to direct-furnish load place power distribution networkIt is not equal to PPRTime, can use and include but not limited to base
In linear scale integrator, with PPRFor reference value, withFor treating that the feedback of control value is to obtain suitable ginseng
Examine valueTo replace in the 4.4th step power distribution computational methods, iteration completes tracking lock PPRPower accurately control
System；
4.6) set a period of time Δ T within, the actual electricity that direct-furnish power supply injects to direct-furnish load place power distribution network andDifference if greater than set positive number, then reflect that the energy storage of the distribution network system at direct-furnish load place is total
Body discharge capability tends to nervous, the dispatching party of plan should be supplied to point out above-mentioned warning information to being responsible for subtracting；Dispatching party can be adjusted
WholeSetting value with control alarm sensitivity level；Dispatching party can decide whether that terminating or change direct-furnish bears upon receipt
Lotus subtracts for plan.
The planned energy storage microgrid Active Control Method subtracting confession of permission direct-furnish power supply the most according to claim 1, its feature
Be: the operational voltage level of described power transmission network (3) 110kV and more than；In step 2.1) in, it was predicted that from subtracting for the time started
t1Play and subtract for any time phase t2The net load curve of each supply node in distribution network system onlyMethod,
And step 4.1) in, it was predicted that the net load of each supply node in subsequent time distribution network systemMethod include but not
It is limited to each type load and wind power generation, the prediction algorithm of exerting oneself of photovoltaic generation；In step 2.1) in, described distributed generation unit
(13) wind power generation form, photovoltaic generation form or diesel generation form are included but not limited to.
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| CN105515083A (en) * | 2015-08-20 | 2016-04-20 | 樊朝晖 | Electric vehicle group charging microgrid control method supporting secure dynamic capacity-increase |
| CN105529793A (en) * | 2015-10-08 | 2016-04-27 | 李庄 | Control method for electromobile group-charging microgrid simultaneously serving as emergency power supply |
| CN105529712A (en) * | 2015-07-30 | 2016-04-27 | 樊朝晖 | Microgrid control method employing integrated storage and distribution design |
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| CN105529712A (en) * | 2015-07-30 | 2016-04-27 | 樊朝晖 | Microgrid control method employing integrated storage and distribution design |
| CN105515083A (en) * | 2015-08-20 | 2016-04-20 | 樊朝晖 | Electric vehicle group charging microgrid control method supporting secure dynamic capacity-increase |
| CN105529793A (en) * | 2015-10-08 | 2016-04-27 | 李庄 | Control method for electromobile group-charging microgrid simultaneously serving as emergency power supply |
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