CN108011388B - A kind of energy-storage system and its control method and control device - Google Patents
A kind of energy-storage system and its control method and control device Download PDFInfo
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- CN108011388B CN108011388B CN201711444983.8A CN201711444983A CN108011388B CN 108011388 B CN108011388 B CN 108011388B CN 201711444983 A CN201711444983 A CN 201711444983A CN 108011388 B CN108011388 B CN 108011388B
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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
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
This application discloses a kind of energy-storage system and its control method and control devices, this method comprises: by (Pmax‑PV)*Pi/P∑And PFVIssue the control unit in the energy-storage units of i-th of normal operation, i=1,2 ..., N, N is the sum of the energy-storage units operated normally, PVFor the sum of the active power on all inlet wires, PFVFor the minimum value in the power factor on all inlet wires, Pci, PiThe current charge power of the energy-storage units of respectively i-th normal operation, specified charge power, P∑=P1+P2+…+PN, PmaxThe maximum demand of electricity is taken from power grid for energy-storage system；This control unit adjusts the maximum charge power of this energy-storage units subsequent time without departing from Pci+ (Pmax‑PV)*Pi/P∑And PiIn minimum value, to ensure that PV≤Pmax, the idle output of this energy-storage units is also adjusted so that PFVNot less than the lower limit of power factor.
Description
Technical field
The present invention relates to electric system technical field of energy management, more specifically to a kind of energy-storage system and its control
Method processed and control device.
Background technique
Currently, the construction of the energy-storage system of plant area is intended to using simultaneously through transport on multiple energy-storage units access multiloop inlet wire
Row, to realize the Optimized Operation management to the energy.
But after multiple energy-storage units parallel runnings, energy-storage units are equivalent to power supply, the shape so energy-storage units work
The variation of state will certainly have an impact the trend of the bus of plant area, so needing to consider the problems of two aspects at this time: 1) storing up
Energy system takes electricity that cannot exceed maximum demand from power grid；2) power factor on any road inlet wire all cannot be below lower limit.
Note: in present specification, " power factor on any road inlet wire ", which refers in particular to any road, to be had on the inlet wire of electric current flowing
Power factor.
Summary of the invention
In view of this, the present invention provides a kind of energy storage system control method and control device, to guarantee energy-storage system from electricity
Net takes electricity to be all not less than lower limit without departing from the power factor on maximum demand and any road inlet wire.
A kind of energy storage system control method, the energy-storage system is using in parallel on multiple energy-storage units access multiloop inlet wire
Operation, the energy storage system control method include:
It is obtained respectively per the active power and power factor on inlet wire all the way；
According to per the active power and power factor on inlet wire all the way, the wattful power on virtual points of common connection is calculated
Rate PVWith power factor PFV；Wherein, the virtual points of common connection refer to by all inlet wires it is equivalent at inlet wire all the way, PVIt is equal to
The sum of active power on all inlet wires, PFVEqual to the minimum value in the power factor on all inlet wires；
(P is calculatedmax-PV)*Pi/P∑；Wherein, i=1,2,3 ..., N, operate normally in the N energy-storage system
The sum of energy-storage units；PiThe specified charge power of the energy-storage units operated normally for i-th, P∑=P1+P2+…+PN；PmaxFor
The energy-storage system takes the maximum demand of electricity from power grid；
By (Pmax-PV)*Pi/P∑And PFVThe control unit being sent in the energy-storage units of i-th of normal operation；
Control unit in the energy-storage units of i-th of normal operation adjusts the charge power of this energy-storage units subsequent time,
Make its maximum value without departing from Pci+ (Pmax-PV)*Pi/P∑And PiIn minimum value, wherein Pci be i-th normal operation energy storage
The current charge power of unit；Also, the control unit in the energy-storage units of i-th of normal operation also adjusts this energy-storage units
Idle output, so that PFVNot less than the lower limit of power factor.
Optionally, described to make its maximum value without departing from Pci+ (Pmax-PV)*Pi/P∑And PiIn minimum value, comprising: make it
Maximum value is Pci+ (Pmax-PV)*Pi/P∑And PiIn minimum value.
Optionally, the PFVNot less than the lower limit of power factor, comprising: PFV is equal to the lower limit of power factor.
A kind of energy-storage system control device, the energy-storage system is using in parallel on multiple energy-storage units access multiloop inlet wire
Operation, the energy-storage system control device include: main control unit and the control unit that is separately positioned in each energy-storage units；
The main control unit, for being obtained respectively per the active power and power factor on inlet wire all the way；According to per all the way
Active power and power factor on inlet wire, are calculated the active-power P on virtual points of common connectionVWith power factor PFV；
Wherein, the virtual points of common connection refer to by all inlet wires it is equivalent at inlet wire all the way, PVEqual to active on all inlet wires
The sum of power, PFVEqual to the minimum value in the power factor on all inlet wires；(P is calculatedmax-PV)*Pi/P∑, wherein i=
1,2,3 ..., N, N is the sum of the energy-storage units operated normally in the energy-storage system, PiThe energy storage operated normally for i-th
The specified charge power of unit, P∑=P1+P2+…+PN, PmaxThe maximum demand of electricity is taken from power grid for the energy-storage system；It will
(Pmax-PV)*Pi/P∑And PFVThe control unit being sent in the energy-storage units of i-th of normal operation；
Control unit in the energy-storage units of i-th of normal operation, for adjusting this energy-storage units subsequent time
Charge power makes its maximum value without departing from Pci+ (Pmax-PV)*Pi/P∑And PiIn minimum value, wherein Pci is i-th of normal fortune
The current charge power of capable energy-storage units；It is also used to adjust the idle output of this energy-storage units, so that PFVNot less than power
The lower limit of factor.
Optionally, the control unit in the energy-storage units of i-th of normal operation, is specifically used for adjusting this energy-storage units
The charge power of subsequent time makes its maximum value Pci+ (Pmax-PV)*Pi/P∑And PiIn minimum value.
Optionally, the control unit in the energy-storage units of i-th of normal operation, is specifically used for adjusting this energy-storage units
Idle output so that PFVEqual to the lower limit of power factor.
A kind of energy-storage system, the energy-storage system is using parallel running on multiple energy-storage units access multiloop inlet wire, institute
Stating energy-storage system further includes any energy-storage system control device as disclosed above.
It can be seen from the above technical scheme that the present invention enable i-th (i=1,2,3 ..., N, N is normal in energy-storage system
The sum of the energy-storage units of operation) a normal operation energy-storage units in control unit with this energy-storage units subsequent time most
Big charge power cannot exceed min (Pci+ (Pmax-PV)*Pi/P∑, Pi) it is used as restrictive condition, it adjusts under this energy-storage units for the moment
The charge power at quarter, to ensure that entire energy-storage system takes electricity without departing from maximum demand from power grid；Also, the present invention also enables
Control unit in the energy-storage units of i normal operation is with PFVNot less than power factor lower limit as restrictive condition, adjust this
The idle output of energy-storage units, to ensure that the power factor on any road inlet wire is all not less than lower limit.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of energy storage that parallel running on the inlet wire of double loop is accessed using multiple energy-storage units disclosed in the prior art
System structure diagram；
Fig. 2 is a kind of energy storage system control method flow chart disclosed by the embodiments of the present invention；
Fig. 3 is a kind of energy-storage system controling device structure diagram disclosed by the embodiments of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a kind of energy storage system control method, the energy-storage system is connect using multiple energy-storage units
Enter parallel running on multiloop inlet wire, such as using simultaneously through transport on multiple energy-storage units access double loop inlet wire shown in Fig. 1
Row.
In energy-storage system shown in Fig. 1, by the double loop inlet wire drawn on 110/35KV bus, i.e. inlet wire #1 and inlet wire #2 this
Two-way inlet wire is coupled on two sections of 10KV buses, this two sections of 10KV buses are connected with bus connection switch K, user load and
Multiple energy-storage units are accessed on this two sections of 10KV buses with parallel way.It include battery pack, energy storage inversion in the energy-storage units
Device and control unit；In low power consumption, the electric energy of power grid carries out charging energy-storing to battery pack by energy storage inverter, this is known as
Energy-storage units charged state；In the electricity consumption peak period, battery pack is discharged to energy storage inverter, and the electric energy of release is through energy storage inverter
It is used after being converted into alternating current for user load, this is known as energy-storage units discharge condition；Control unit in energy-storage units calculates
When this energy-storage units charges, when discharges.In addition, user load also can be set in the energy-storage units, can not also set
Set user load.
It is accessed on multiloop inlet wire for the energy-storage system of parallel running for using multiple energy-storage units, each energy-storage units
After parallel running, each energy-storage units are equivalent to power supply, so the variation of energy-storage units working condition will certainly be to the mother of plant area
The trend of line has an impact, such as: 1) when each energy-storage units charge, the active power that energy-storage system is absorbed from power grid can increase
Add；2) when each energy-storage units discharge, certain is all the way or the power factor on a few road inlet wires can reduce.But should be noted that pair
In 1), energy-storage system takes electricity cannot be beyond the maximum demand (maximum demand checked and approved through user's application, electric industry department from power grid
Also known as contract power load refers to that power consumer at a time uses the maximum active power value of electric energy), it otherwise will face and penalize
Money；For 2), the power factor on any road inlet wire all cannot be below the lower limit of grid company requirement, it otherwise will also face and penalize
Money.
To avoid imposing a fine, energy storage system control method disclosed by the embodiments of the present invention is dedicated to guaranteeing energy-storage system from power grid
Electricity is taken all to be not less than lower limit without departing from the power factor on maximum demand and any road inlet wire.As shown in Fig. 2, the energy storage
System control method specifically includes:
Step S01: the active power and power factor on each inlet wire are obtained respectively.
Step S02: it according to per the active power and power factor on inlet wire all the way, is calculated on virtual points of common connection
Active-power PVWith power factor PFV；Wherein, the virtual points of common connection refer to by all inlet wires it is equivalent at all the way into
Line；PVEqual to the sum of the active power on all inlet wires；PFVEqual to the minimum value in the power factor on all inlet wires.
Specifically, being simplified control logic, the embodiment of the present invention is equivalent at inlet wire all the way by all inlet wires, it is equivalent at this
Inlet wire is known as virtual points of common connection all the way.By taking Fig. 1 as an example, the real-time running data on any road inlet wire includes active power
(active power absorbed from power grid), reactive power, power factor, three-phase voltage, three-phase current etc., inlet wire #1 and inlet wire #2
On real-time running data can directly measure to obtain, the real-time running data on virtual points of common connection be then according to inlet wire #1 and
Real-time running data on inlet wire #2 is calculated, and is described in detail below:
By the active power on inlet wire #1, reactive power, power factor, A phase voltage, B phase voltage, C phase voltage, A phase electricity
Stream, B phase current, C phase current respectively indicate are as follows: Pv1, Q1, PF1, Ua1, Ub1, Uc1, Ia1, Ib1, Ic1；It will be on inlet wire #2
Active power, reactive power, power factor, A phase voltage, B phase voltage, C phase voltage, A phase current, B phase current, C phase current point
Pv2, Q2, PF2, Ua2, Ub2, Uc2, Ia2, Ib2, Ic2 are not expressed as it；By the active power, idle on virtual points of common connection
Power, power factor, A phase voltage, B phase voltage, C phase voltage, A phase current, B phase current, C phase current be expressed as Pv, Qv,
PFv, Uav, Ubv, Ucv, Iav, Ibv, Icv then exist:
Pv=Pv1+Pv2；
Qv=Q1+Q2；
Pv=min (PF1, PF2)；
Uav=Ua1=Ua2；
Ubv=Ub1=Ub2；
Ucv=Uc1=Uc2；
Iav=Ia1+Ia2；
Ibv=Ib1+Ib2；
Icv=Ic1+Ic2.
The embodiment of the present invention need to only use the Pv and PF in above-mentioned calculated result in subsequent calculating processV.Subsequent calculating
In the process, guarantee that the active-power P v of virtual points of common connection is no more than maximum demand, ensure that energy-storage system takes from power grid
Electricity is without departing from maximum demand；And guarantee the power factor PF of virtual points of common connectionVNot less than lower limit, ensure that any
Power factor on the inlet wire of road is all not less than lower limit.
Step S03: (P is calculatedmax-PV)*Pi/P∑；
Wherein, i=1,2,3 ..., N, N is the sum of energy-storage units operated normally in the energy-storage system；PiIt is i-th
The specified charge power of the energy-storage units of a normal operation, P∑=P1+P2+…+PN, i.e. P∑For the energy storage list of all normal operations
The summation of the specified charge power of member；PmaxThe maximum demand of electricity is taken from power grid for the energy-storage system.
Step S04: by (Pmax-PV)*Pi/P∑And PFVThe control list being sent in the energy-storage units of i-th of normal operation
Member.
The control unit in energy-storage units that step S05: i-th operates normally adjusts filling for this energy-storage units subsequent time
Electrical power makes its maximum value without departing from Pci+ (Pmax-PV)*Pi/P∑And PiIn minimum value, wherein Pci be i-th normal operation
The current charge power of energy-storage units；Also, the control unit in the energy-storage units of i-th of normal operation also adjusts this energy storage
The idle output of unit, so that PFVNot less than the lower limit of power factor.
It is charged specifically, the control unit in energy-storage units is also used to calculate this energy-storage units using great power.Example
Such as, under energy-storage units charged state, the embodiment of the present invention fills the maximum for the energy-storage units subsequent time that i-th operates normally
Electrical power cannot exceed min (Pci+ (Pmax-PV)*Pi/P∑, Pi) this restrictive condition, the control being sent in this energy-storage units
Unit, the energy-storage units for operating normally each can lower abridged edition energy-storage units subsequent time in corresponding restrictive condition
The size of charge power takes electricity beyond maximum demand P to avoid the occurrence of energy-storage system from power gridmax.It makes a concrete analysis of as follows:
Assuming that total electric power of all user loads is P in energy-storage system0(including being arranged in outside each energy-storage units
User load and the user load being arranged in inside each energy-storage units), then total charging of the energy-storage units of all normal operations
Power is PV-P0；Take electricity that cannot exceed maximum demand P from power grid due to energy-storage system againmax, i.e. PV≤Pmax, so all normal
The energy-storage units of operation subsequent time total charge power no more than Pmax-P0.That is, the storage of all normal operations
Total charge power maximum ascending amount no more than (P of the energy unit in subsequent timemax-P0)-(PV-P0)=Pmax-PV。
To guarantee PV≤Pmax, the embodiment of the present invention requires the energy-storage units of all normal operations in the charging of subsequent time
Power maximum ascending amount is allocated by its specified charge power, then the energy-storage units of i-th of normal operation are in subsequent time
Charge power maximum ascending amount is no more than (Pmax-PV)*Pi/P∑。
Assuming that the current charge power of energy-storage units of i-th of normal operation is Pci, then it is to guarantee PV≤Pmax, i-th
The energy-storage units of normal operation are in the permitted maximum charge power of subsequent time no more than Pci+ (Pmax-PV)*Pi/P∑.Again
Since the charge power of the energy-storage units of each normal operation cannot exceed itself specified charge power, so the present invention is implemented
Example requires the energy-storage units of i-th of normal operation in the permitted maximum charge power of subsequent time no more than Pci+ (Pmax-
PV)*Pi/P∑And PiIn minimum value, i.e., no more than min (Pci+ (Pmax-PV)*Pi/P∑, Pi)。
In view of the charge power of energy-storage units is bigger, the completion charging time used is shorter, so the embodiment of the present invention pushes away
It recommends and the energy-storage units that i-th operates normally is limited to min (Pci+ (P in the permitted maximum charge power of subsequent timemax-
PV)*Pi/P∑, Pi), it completes to charge in the shortest time to realize.
In addition, the control unit in energy-storage units is also used to calculate this energy-storage units using great idle output.For example,
Under energy-storage units discharge condition, the embodiment of the present invention is by PFVNot less than the lower limit of power factor, this restrictive condition is sent to
Control unit in the energy-storage units of all normal operations, the energy-storage units for operating normally each are in this restrictive condition
The size of the idle output of abridged edition energy-storage units is lowered, to avoid the occurrence of the power factor of any inlet wire lower than lower limit.Specifically
, since the reactive power variation that the energy-storage units of each normal operation export can influence PFVSize, so adjusting normal
The reactive power of the energy-storage units output of operation, so that it may change PFVSize relation between the lower limit of power factor.It needs
Illustrate, compensate it is excessive it is idle will increase loss, so it is idle export not be to be the bigger the better, i.e. PFVBe not it is more big more
It is good, so, the embodiment of the present invention recommends to set PF for the restrictive conditionVEqual to the lower limit.
Seen from the above description, the embodiment of the present invention enable i-th (i=1,2,3 ..., N, N is to operate normally in energy-storage system
Energy-storage units sum) a normal operation energy-storage units in control unit filled with the maximum of this energy-storage units subsequent time
Electrical power cannot exceed min (Pci+ (Pmax-PV)*Pi/P∑, Pi) it is used as restrictive condition, adjust this energy-storage units subsequent time
Charge power, to ensure that entire energy-storage system takes electricity without departing from maximum demand from power grid；Also, the embodiment of the present invention also enables
Control unit in the energy-storage units of i-th of normal operation is with PFVNot less than power factor lower limit as restrictive condition, adjust
The idle output of this energy-storage units, to ensure that the power factor on any road inlet wire is all not less than lower limit.
Corresponding to the above method embodiment, the embodiment of the invention also discloses a kind of energy-storage system control device, institutes
Energy-storage system is stated using parallel running on multiple energy-storage units access multiloop inlet wire.As shown in figure 3, the energy-storage system control
Device includes: main control unit 100 and the control unit being separately positioned in each energy-storage units 200；
The main control unit 100 is obtained respectively per the active power and power factor on inlet wire all the way；According to per all the way into
Active power and power factor on line, are calculated the active-power P on virtual points of common connectionVWith power factor PFV；Its
In, the virtual points of common connection refer to by all inlet wires it is equivalent at inlet wire all the way, PVEqual to the wattful power on all inlet wires
The sum of rate, PFVEqual to the minimum value in the power factor on all inlet wires；(P is calculatedmax-PV)*Pi/P∑, wherein i=1,
2,3 ..., N, N are the sum of the energy-storage units operated normally in the energy-storage system, PiThe energy storage list operated normally for i-th
The specified charge power of member, P∑=P1+P2+…+PN, PmaxThe maximum demand of electricity is taken from power grid for the energy-storage system；By (Pmax-
PV)*Pi/P∑And PFVThe control unit 200 being sent in the energy-storage units of i-th of normal operation；
Control unit 200 in the energy-storage units of i-th of normal operation, for adjusting this energy-storage units subsequent time
Charge power, make its maximum value without departing from Pci+ (Pmax-PV)*Pi/P∑And PiIn minimum value, wherein Pci is normal i-th
The current charge power of the energy-storage units of operation；It is also used to adjust the idle output of this energy-storage units, so that PFVNot less than function
The lower limit of rate factor.
Optionally, the control unit 200 in the energy-storage units of i-th of normal operation, is specifically used for adjusting this energy storage
The charge power of unit subsequent time makes its maximum value Pci+ (Pmax-PV)*Pi/P∑And PiIn minimum value.
Optionally, the control unit 200 in the energy-storage units of i-th of normal operation, is specifically used for adjusting this energy storage
The idle output of unit, so that PFVEqual to the lower limit of power factor.
The embodiment of the invention also discloses a kind of energy-storage system, the energy-storage system is accessed more times using multiple energy-storage units
Parallel running on the inlet wire of road, the energy-storage system further include any energy-storage system control device as disclosed above.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments in the case where not departing from the spirit or scope of the embodiment of the present invention.Therefore,
The embodiment of the present invention is not intended to be limited to the embodiments shown herein, and be to fit to principles disclosed herein and
The consistent widest scope of features of novelty.
Claims (7)
1. a kind of energy storage system control method, which is characterized in that the energy-storage system accesses multiloop using multiple energy-storage units
Parallel running on inlet wire, the energy storage system control method include:
It is obtained respectively per the active power and power factor on inlet wire all the way；
According to per the active power and power factor on inlet wire all the way, the active-power P on virtual points of common connection is calculatedV
With power factor PFV；Wherein, the virtual points of common connection refer to by all inlet wires it is equivalent at inlet wire all the way, PVEqual to all
The sum of active power on inlet wire, PFVEqual to the minimum value in the power factor on all inlet wires；
(P is calculatedmax-PV)*Pi/P∑；Wherein, i=1,2,3 ..., N, N is the energy storage that operates normally in the energy-storage system
The sum of unit；PiThe specified charge power of the energy-storage units operated normally for i-th, P∑=P1+P2+…+PN；PmaxIt is described
Energy-storage system takes the maximum demand of electricity from power grid；
By (Pmax-PV)*Pi/P∑And PFVThe control unit being sent in the energy-storage units of i-th of normal operation；
Control unit in the energy-storage units of i-th of normal operation adjusts the charge power of this energy-storage units subsequent time, makes it
Maximum value is without departing from Pci+ (Pmax-PV)*Pi/P∑And PiIn minimum value, wherein Pci be i-th normal operation energy-storage units
Current charge power；Also, the control unit in the energy-storage units of i-th of normal operation also adjusts the idle of this energy-storage units
Output, so that PFVNot less than the lower limit of power factor.
2. energy storage system control method according to claim 1, which is characterized in that described to make its maximum value without departing from Pci+
(Pmax-PV)*Pi/P∑And PiIn minimum value, comprising: make its maximum value Pci+ (Pmax-PV)*Pi/P∑And PiIn minimum value.
3. energy storage system control method according to claim 1 or 2, which is characterized in that the PFVNot less than power factor
Lower limit, comprising: PFVEqual to the lower limit of power factor.
4. a kind of energy-storage system control device, which is characterized in that the energy-storage system accesses multiloop using multiple energy-storage units
Parallel running on inlet wire, the energy-storage system control device include: main control unit and are separately positioned in each energy-storage units
Control unit；
The main control unit, for being obtained respectively per the active power and power factor on inlet wire all the way；According to per inlet wire all the way
On active power and power factor, the active-power P on virtual points of common connection is calculatedVWith power factor PFV；Wherein,
The virtual points of common connection refer to by all inlet wires it is equivalent at inlet wire all the way, PVEqual to the active power on all inlet wires it
With PFVEqual to the minimum value in the power factor on all inlet wires；(P is calculatedmax-PV)*Pi/P∑, wherein i=1,2,
3 ..., N, N are the sum of the energy-storage units operated normally in the energy-storage system, PiThe energy-storage units operated normally for i-th
Specified charge power, P∑=P1+P2+…+PN, PmaxThe maximum demand of electricity is taken from power grid for the energy-storage system；By (Pmax-
PV)*Pi/P∑And PFVThe control unit being sent in the energy-storage units of i-th of normal operation；
Control unit in the energy-storage units of i-th of normal operation, for adjusting the charging of this energy-storage units subsequent time
Power makes its maximum value without departing from Pci+ (Pmax-PV)*Pi/P∑And PiIn minimum value, wherein Pci be i-th normal operation
The current charge power of energy-storage units；It is also used to adjust the idle output of this energy-storage units, so that PFVNot less than power factor
Lower limit.
5. energy-storage system control device according to claim 4, which is characterized in that the energy storage of i-th of normal operation
Control unit in unit makes its maximum value Pci+ specifically for adjusting the charge power of this energy-storage units subsequent time
(Pmax-PV)*Pi/P∑And PiIn minimum value.
6. energy-storage system control device according to claim 4 or 5, which is characterized in that the storage of i-th of normal operation
Control unit in energy unit, specifically for adjusting the idle output of this energy-storage units, so that PFVEqual under power factor
Limit.
7. a kind of energy-storage system, which is characterized in that the energy-storage system is accessed on multiloop inlet wire simultaneously using multiple energy-storage units
Through transport row, the energy-storage system further include the energy-storage system control device as described in any one of claim 4-6.
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