CN104917242B - A kind of large-sized battery energy-storage system and its energy dispatching method based on Temperature Field Control - Google Patents
A kind of large-sized battery energy-storage system and its energy dispatching method based on Temperature Field Control Download PDFInfo
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- CN104917242B CN104917242B CN201510333678.6A CN201510333678A CN104917242B CN 104917242 B CN104917242 B CN 104917242B CN 201510333678 A CN201510333678 A CN 201510333678A CN 104917242 B CN104917242 B CN 104917242B
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The present invention provides a kind of large-sized battery energy-storage system and its energy dispatching method based on Temperature Field Control, belongs to battery temperature field control technology field.It it formed by multiple energy storage power module parallels, energy storage power module includes battery pack and battery-based bidirectional electric energy transformation topology circuit.The battery-based bidirectional electric energy transformation topology circuit includes two-way DC-DC conversion module, bidirectional, dc-exchange conversion module and voltage output end.While the present invention may be implemented energy-storage system and meet system stored energy power demand, and it can protect, safeguard battery pack, make battery pack work in safety, suitable temperature range, the final extension for realizing battery life.
Description
Technical field
The present invention relates to battery temperature field control technology field, in particular to a kind of large-sized battery based on Temperature Field Control
Energy-storage system and its energy dispatching method.
Background technique
In current battery application field, what battery heat dissipation technology generallyd use is all external strong cold (air-cooled, water cooling etc.), is dissipated
The target of thermal design scheme is all soaking, guarantees that battery work in safe temperature range, reaches the mesh for extending battery
's.In large-scale stored energy application, usually require in series and parallel to answer single battery in groups to meet the demands such as energy storage power, capacity
With cooperation electrical energy changer provides to upper level power system or absorb power.Large-scale energy storage device working environment is not
Well, the ventilation and heat of environment is not able to satisfy battery system cooling requirements, it is therefore desirable to carry out special dissipate to battery system
Thermal design.The anti-abuse performance of battery is poor, and multiplying power property is greatly influenced by temperature, and in other words, battery body temperature rise is with charge and discharge
Current ratio is related, if can control the charging and discharging currents size of battery, can realize to electricity to a certain extent
The control of pond temperature.
Therefore, energy storage power mould can be adjusted in conjunction with transformation of electrical energy from the angle of large-sized battery energy storage device system entirety
Block charging and discharging currents provide a kind of novel control method, and transformation of electrical energy not only may be implemented and meet power demand, but also can be with
The control to battery temperature is realized by way of regulating cell charging and discharging currents size, the final extension for realizing battery life.
Summary of the invention
The present invention provides one kind based on temperature controlled large-sized battery energy-storage system and its energy dispatching method, passes through control
Energy-storage system charging/discharging thereof, which meets, to be provided system power demand and guarantees that all battery packs work in energy-storage system is being pacified
The Bi-objective in total temperature area.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of large-sized battery energy-storage system based on Temperature Field Control, it is formed by multiple energy storage power module parallels, storage
Energy power module includes battery pack and battery-based bidirectional electric energy transformation topology circuit.
Further, the battery-based bidirectional electric energy transformation topology circuit include two-way DC-DC conversion module,
Bidirectional, dc-exchange conversion module and voltage output end.
Further, the battery-based bidirectional electric energy transformation topology circuit includes switching device and battery pack interface.
Further, the switching device is silicon carbide power pipe, thyristor, field-effect tube or insulated gate bipolar crystal
Pipe.
Further, it further includes battery management module for monitoring single battery state in real time and for monitoring electric energy
The control unit of transformation system operating status.
Further, described control unit includes for being opened according to the state of external load demands control system initiate mode
Module and battery voltage, electric current, SOC, temperature information for obtaining according to battery management module are closed, state is carried out to battery
Assessment processing module.
A kind of energy dispatching method of the large-sized battery energy-storage system based on Temperature Field Control, this method include
All battery pack external behaviors in S1, monitoring and evaluation energy-storage system: whether SOC, voltage, electric current, temperature are more than limit
Definite value is more than limit value as certain group battery pack only has one or more than one external behavior, then returns to step S1；
Conversely, thening follow the steps S2；
S2, battery pack secure accessing, Bi-objective control start, and execute S3 to S6；
S3, adaptive value of each particle under target 1 is calculated；
S4, individual and group's optimal value under target 1 are found out；
S5, the speed for updating each particle and position；
S6, termination condition 1 judge, execute S7 if setting up, otherwise return and execute S3；
S7, adaptive value of each particle under target 2 is calculated；
S8, individual and group's optimal value under target 2 are found out；
S9, the speed for updating each particle and position；
S10, termination condition 2 judge, execute S11 if setting up, otherwise return and execute S7；
S11, objective function blurring；
S12, searching system optimal value；
S13, termination condition 3 judge, execute S14 if setting up, otherwise return and execute S12；
S14, each energy-storage module power distribution of output；
S15, step S1 to S14 is repeated.
Compared to the prior art the present invention, has the following advantages that and effect: the present invention may be implemented energy-storage system and meet system
While system energy storage power demand, and it can protect, safeguard battery pack, make battery pack work in safety, suitable temperature range, most
The extension of battery life is realized eventually.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram based on temperature controlled large-sized battery energy-storage system；
Fig. 2 is a kind of schematic diagram based on the control of temperature controlled large-sized battery energy-storage system of the present invention；
Fig. 3 is a kind of showing for the energy dispatching method implementation of large-sized battery energy-storage system based on Temperature Field Control of the present invention
It is intended to；
Fig. 4 is that battery connects in a kind of energy dispatching method of the large-sized battery energy-storage system based on Temperature Field Control of the present invention
Enter the schematic diagram of determination strategy implementation；
Fig. 5 is Bi-objective in a kind of energy dispatching method of the large-sized battery energy-storage system based on Temperature Field Control of the present invention
The schematic diagram that control strategy is implemented.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is to this hair
Bright explanation and the invention is not limited to following embodiments.
A kind of large-sized battery energy-storage system based on Temperature Field Control, it is formed by multiple energy storage power module parallels, storage
Energy power module includes battery pack and battery-based bidirectional electric energy transformation topology circuit.
The battery-based bidirectional electric energy transformation topology circuit includes two-way DC-DC conversion module, bidirectional, dc-
Exchange conversion module and voltage output end.
The battery-based bidirectional electric energy transformation topology circuit includes switching device and battery pack interface.
The switching device is silicon carbide power pipe, thyristor, field-effect tube or insulated gate bipolar transistor.
It further includes battery management module for monitoring single battery state in real time and for monitoring electrical conversion systems
The control unit of operating status.
Described control unit include for according to the states switching module of external load demands control system initiate mode and
Battery voltage, electric current, SOC, temperature information for being obtained according to battery management module carry out status assessment processing to battery
Module.
Bi-objective model based on temperature controlled large-sized battery energy-storage system is as follows,
Target 1: power match target:
F1=PAlways(t)=PDC(t)+PAC(t)=P#1(t)+P#2(t)+...+P#i(t)；
For energy-storage system, to meet system stored energy power requirement.Existing DC energy storage in energy-storage system, and have friendship
Energy storage is flowed, the two is added as the general power of energy-storage system.Energy-storage system is made of each energy storage power module parallel again, then is stored up
Energy system total power is the power P of each energy storage power module#i(t) (P can just be born, and just represent battery discharge, negative generation for addition
Table charges the battery), i represents energy storage power module number, and t represents the current time of running.
Target 2: temperature objectives:
Tbatt=Tbatt#1(t)+Tbatt#2(t)+...+Tbatt#i(t)
F2=min (Tbatt)
Cell safety uses angle, and in order to guarantee battery pack work in safe temperature range, target is just to try to allow electricity
Pond work is in security interval, and even comfortable temperature range, this extends battery life, dimension for protection battery pack safety
It protects very crucial for battery.Because battery body temperature can not obtain, the present invention considers with outside batteries temperature, that is, BMS detection
Adopt degree of rising again Tbatt#iAs control variable, the minimum value in the hope of electrolytic cell group temperature sum is optimization aim 2.
The constraint condition that usual energy-storage system charge and discharge scheduling problem mainly considers has battery charge power and battery capacity
Constraint condition is constrained, the present invention further adds battery temperature constraint condition and current ratio constraint condition.Specific constraint item
Part is as follows,
The constraint of battery pack charge power:
Pi,low≤Pc(t)≤Pi,high
In formula: i is energy storage power module number, similarly hereinafter；Pi, low are that t moment numbers electricity in the energy storage power module for being i
Current transformer minimum charge power can be converted；Pi, high are to number transformation of electrical energy current transformer in the energy storage power module for being i the i moment
Maximum charge power.
Battery electric quantity constraint:
Si_low≤S(t)≤Si_high
In formula: Si, low are that t moment numbers the minimum electricity of battery pack in the energy storage power module for being i, when Si, high are t
Carve battery pack highest electricity in the energy storage power module that number is i.
Battery pack state-of-charge SOC constraint:
SOCi_low≤SOCi(t)≤SOCi_high
In formula: SOCi (t) is that t moment numbers battery pack state-of-charge in the energy storage power module for being i, and SOCi_low is to compile
Number for i energy storage power module in battery pack SOC lower limit, SOCi_high be number be i energy storage power module in battery pack
The SOC upper limit.
Battery pack temperature limitation:
Ti_low≤Ti(t)≤Ti_high
In formula: Ti (t) is that t moment numbers battery pack temperature size in the energy storage power module for being i, and Ti_low is that number is
Battery pack temperature lower limit in the energy storage power module of i, Ti_high are to number in the energy storage power module for being i on battery pack temperature
Limit.
The limitation of battery pack current multiplying power:
Cchar_i(t)≤Cchar_i_high；
Cdischar_i(t)≤Cdischar_i_high
In formula: Cchar_i (t) is that t moment numbers battery pack charging current multiplying power size in the energy storage power module for being i,
Cdischar_i (t) is that t moment numbers battery power discharge current ratio size in the energy storage power module for being i, Cchar_i_
High is to number the battery pack charging current multiplying power upper limit in the energy storage power module for being i, and Cdischar_i_high is that number is i
Energy storage power module in the battery power discharge current ratio upper limit.
The power target and temperature objectives of proposition have different dimensions, simply the two cannot be superimposed, this patent into
One step disclose it is a kind of objective function is blurred using fuzzy method, solve power target and temperature objectives dimension not
Same problem.
Blurring is exactly to become using battery pack external temperature as state variable using battery charging and discharging electric current as control
Amount provides the size of current arrangement rule of all energy storage power cells according to the size variation of all battery pack temperature state variables
Then, and the size of battery current is just corresponding to watt level, this just establishes the connection between two optimization aims.Size of current
Queueing discipline then according to corresponding battery pack temperature its temperature limiting section position:
If battery temperature, hereinafter, it is necessary to battery charging and discharging is changed, improves the battery temperature in its temperature range lower limit value
Degree, makes its temperature be increased to temperature range with inner；
If battery temperature more than its temperature range upper limit value, it is necessary to stop the work of the battery, makes its temperature exist
Drop to section with inner；
If high-temperature region of the battery temperature within its temperature range, it is necessary to reduce to change battery charging and discharging current ratio,
Slow down and change battery temperature rise slope, makes its temperature in the early section of holding with inner；
If low-temperature space of the battery temperature within its temperature range, it is necessary to serve as other energy storage power modules " to expel the heat-evil
Device ", suitably increases the battery charging and discharging current ratio, and the current ratio of other energy storage power module battery packs in this way can subtract
It is small and keep entire energy-storage system power constant.
It can be observed from fig. 2 that the invention discloses one kind to be based on temperature controlled large-sized battery energy-storage system control strategy,
Real-time battery status is assessed in the detection of battery state evaluation module, and Bi-objective control strategy combines the given value of input, limitation item
Part and the state of battery etc., calculating, optimizing provide the operating power value of each energy storage power cell currently needed, last
Control reaction is in the control of electronic power convertor switch state.
From fig. 4 it can be seen that the energy of the invention discloses a kind of large-sized battery energy-storage system based on Temperature Field Control
Battery access determination strategy is implemented in dispatching method:
Step S1, judge energy storage power module battery pack external behavior parameter: voltage, electric current, SOC, temperature whether be more than
Limit value returns to step S1 if its external behavior parameter is more than corresponding limit value, otherwise thens follow the steps S2；
Step S2, "AND" judges, by the out-of-limit mark phase "AND" of its all external behavior parameter, only as all external spies
Property execute step S3 when being all not above limit value, it is no know execute step S4；
Step S3, battery status is good, and secure accessing etc. is to be used；
Step S4, battery status is alarmed, and needs to check in time, maintenance.
It is seen from fig 5 that the present invention further discloses a kind of large-sized battery energy-storage system based on Temperature Field Control
Energy dispatching method in Bi-objective control strategy implement:
Step S1, all battery pack external behaviors in monitoring and evaluation energy-storage system: remaining state-of-charge (SOC:State of
Charge), whether voltage, electric current, temperature are more than limit value, as certain group battery pack only has one or more than one outside
Characteristic is more than limit value, then returns to step S1；Conversely, S2 is thened follow the steps,
Step S2, battery pack secure accessing, Bi-objective control start, and execute S3 to S13；
Step S3, adaptive value of each particle under target 1 is calculated；
Step S4, individual and group's optimal value under target 1 are found out；
Step S5, speed and the position of each particle are updated；
Step S6, termination condition 1 judges, executes S7 if setting up, otherwise returns and execute S3；
Step S7, adaptive value of each particle under target 2 is calculated；
Step S8, individual and group's optimal value under target 2 are found out；
Step S9, speed and the position of each particle are updated；
Step S10, termination condition 2 judges, executes S11 if setting up, otherwise returns and execute S7；
Step S11, objective function is blurred；
Step S12, searching system optimal value；
Step S13, termination condition 3 judges, executes S14 if setting up, otherwise returns and execute S12；
Step S14, each energy-storage module power distribution is exported；
Step S15, step S1 to S14 is repeated.
The present invention is based on battery energy storage applications to utilize electric energy from battery status assessment, cell safety, battery maintenance angle
Transformation realizes that the regulation of battery temperature, such regulation have carried out heat management from battery body, provide for battery thermal management new
Thinking.
It is of the present invention to be based on temperature controlled battery energy storage apparatus system working principle as shown in figure 3, at the beginning of system energization
Beginningization software, hardware, controller establish whether connecting detection needs to carry out energy storage, root by detection module and higher level's power system
Judge whether to enable electrical conversion systems of the present invention according to detection signal.If system needs to carry out energy storage, DC is first distributed
Energy storage and AC energy storage start battery management module in electrical conversion systems, detect battery status, battery detecting process: logical first
It crosses battery management module to be monitored battery status, judges whether battery occurs that under-voltage, over-voltage, overcurrent, SOC transfinites and temperature
The equal batteries abnormal conditions that transfinite guarantee system as shown in figure 4, detecting its battery status by battery management module cycle analysis
The safety of battery.After battery management module is to battery detecting, after cell safety state, start Bi-objective control, binocular
Mark control adjusts energy storage power according to current power demand, current battery temperature and system given value and battery limits value
Module operating power of lower a moment indirectly controls battery temperature with realizing, guarantees that all batteries work reasonable or even suitable
Within the temperature range of.
In conclusion the safe operation and dimension of battery pack in large-sized battery energy-storage system may be implemented in scheme of the present invention
Shield guarantees that battery work within the scope of reasonable temperature, is sufficiently used in the case where meeting energy-storage system power demand again
The superiority of bidirectional electric energy transformation is provided with a kind of new method for the maintenance of energy-storage system battery.
Above content is only illustrations made for the present invention described in this specification.Technology belonging to the present invention
The technical staff in field can make various modifications or additions to the described embodiments or by a similar method
Substitution, content without departing from description of the invention or beyond the scope defined by this claim should belong to this
The protection scope of invention.
Claims (1)
1. a kind of energy dispatching method of the large-sized battery energy-storage system based on Temperature Field Control, it is characterised in that: the large size
Battery energy storage system is formed by multiple energy storage power module parallels, and energy storage power module includes battery pack and battery-based pair
To transformation of electrical energy topological circuit, it further includes battery management module for monitoring single battery state in real time and for monitoring electricity
The control unit of energy transformation system operating status, described control unit include for being enabled according to external load demands control system
States switching module and battery voltage, electric current, SOC, temperature information for being obtained according to battery management module, to battery into
Row status assessment processing module, the battery-based bidirectional electric energy transformation topology circuit include two-way DC-DC transformation mould
Block, bidirectional, dc-exchange conversion module and voltage output end；
This method includes
All battery pack external behaviors in S1, monitoring and evaluation energy-storage system: whether SOC, voltage, electric current, temperature are more than limit value,
Such as certain group battery pack, only one or more than one external behavior are more than limit value, then return to step S1；Conversely, then
Execute step S2；
S2, battery pack secure accessing, Bi-objective control start, and execute S3 to S6；
S3, adaptive value of each particle under target 1 is calculated；
S4, individual and group's optimal value under target 1 are found out；
S5, the speed for updating each particle and position；
S6, termination condition 1 judge, execute S7 if setting up, otherwise return and execute S3；
S7, adaptive value of each particle under target 2 is calculated；
S8, individual and group's optimal value under target 2 are found out；
S9, the speed for updating each particle and position；
S10, termination condition 2 judge, execute S11 if setting up, otherwise return and execute S7；
S11, objective function blurring；
S12, searching system optimal value；
S13, termination condition 3 judge, execute S14 if setting up, otherwise return and execute S12；
S14, each energy-storage module power distribution of output；
S15, step S1 to S14 is repeated；
The target 1 is F1=PAlways(t)=PDC(t)+PAC(t)=P#1(t)+P#2(t)+...+P#i(t), the target 2 is
Wherein, P#iIt (t) is the power numbered in the energy storage power module for being i, Tbatt#iIn the energy storage power module for being i for number
Battery pack temperature；
The termination condition 1, the termination condition 2 and the termination condition 3 are Pi,low≤Pc(t)≤Pi,high、Si_low≤
S(t)≤Si_high、SOCi_low≤SOCi(t)≤SOCi_high、Ti_low≤Ti(t)≤Ti_highAnd
Wherein, PcIt (t) is the charge power of battery pack in t moment energy storage power module, Pi,lowThe energy storage for being i for t moment number
Transformation of electrical energy current transformer minimum charge power, P in power modulei,highElectric energy in the energy storage power module for being i for t moment number
Current transformer maximum charge power is converted, S (t) is the electricity of battery pack in t moment energy storage power module, Si_lowFor t moment number
For the minimum electricity of battery pack in the energy storage power module of i, Si_highFor t moment number be i energy storage power module in battery pack most
High electricity, SOCiIt (t) is that t moment numbers battery pack state-of-charge in the energy storage power module for being i, SOCi_lowFor t moment number
For battery pack state-of-charge lower limit in the energy storage power module of i, SOCi_highElectricity in the energy storage power module for being i for t moment number
The pond group state-of-charge upper limit, TiIt (t) is that t moment numbers battery pack temperature size in the energy storage power module for being i, Ti_lowWhen for t
Carve battery pack temperature lower limit in the energy storage power module that number is i, Ti_highElectricity in the energy storage power module for being i for t moment number
Pond group temperature upper limit, Cchar_iIt (t) is that t moment numbers battery pack charging current multiplying power size in the energy storage power module for being i,
Cdischar_iIt (t) is that t moment numbers battery power discharge current ratio size in the energy storage power module for being i, Cchar_i_highWhen for t
Carve the battery pack charging current multiplying power upper limit in the energy storage power module that number is i, Cdischar_i_highThe storage for being i for t moment number
The battery power discharge current ratio upper limit in energy power module.
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| CN105071547B (en) * | 2015-09-23 | 2018-03-27 | 山东圣阳电源股份有限公司 | A kind of tandem type battery energy storage system and maintaining method |
| CN109245196B (en) * | 2018-08-23 | 2020-06-30 | 中国科学院自动化研究所 | Optimization control method and system for multi-battery energy storage system and storage medium |
| CN109066922A (en) * | 2018-10-10 | 2018-12-21 | 中车株洲电力机车有限公司 | A kind of rail traffic vehicles and its storage battery power supply system |
| CN112583248B (en) * | 2019-09-30 | 2023-07-11 | 比亚迪股份有限公司 | Train, bidirectional DC-DC converter, control method, device and system thereof |
| CN111916871B (en) * | 2020-07-16 | 2021-09-14 | 合肥阳光新能源科技有限公司 | Temperature control method, energy storage discharge control method and energy storage application system for energy storage battery compartment |
| CN111740474A (en) * | 2020-07-24 | 2020-10-02 | 中国华能集团清洁能源技术研究院有限公司 | Battery energy storage system based on distributed control and layout and energy scheduling method thereof |
| CN115663871B (en) * | 2022-12-29 | 2023-04-04 | 广东运峰电力安装有限公司 | Flow power station control system and method |
| CN115693744B (en) * | 2022-12-29 | 2023-04-07 | 广东运峰电力安装有限公司 | Liquid flow energy storage control system and method |
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