CN206323146U - A kind of battery energy storage system - Google Patents
A kind of battery energy storage system Download PDFInfo
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- CN206323146U CN206323146U CN201621346818.XU CN201621346818U CN206323146U CN 206323146 U CN206323146 U CN 206323146U CN 201621346818 U CN201621346818 U CN 201621346818U CN 206323146 U CN206323146 U CN 206323146U
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/10—Flexible AC transmission systems [FACTS]
Abstract
The utility model provides a kind of battery energy storage system, solves existing battery energy storage system and requires high defect to battery consistency.The utility model includes at least one energy-storage battery group, at least one battery energy storage converter and a central control unit.Wherein, each energy-storage battery is connected with each battery energy storage converter respectively, and the output end of at least one battery energy storage converter is connected in parallel to grid-connected power network；Central control unit is connected with each energy-storage battery, battery energy storage converter respectively by communication network.Energy-storage battery includes energy-storage battery group and battery management system, and battery energy storage converter includes energy converter and control circuit.The utility model realizes low pressure, the direct grid-connected of low-power battery group, and distribute charge-discharge electric power according to battery capacity difference, realize the automatic equalization of battery behavior, eliminate influence of the battery behavior difference to energy-storage system, simple in construction, reliability is high, it is adaptable to high power battery energy-storage system application.
Description
Technical field
The utility model is related to a kind of battery energy storage system, belongs to the Technics of Power Electronic Conversion technology neck of electrical technology subject
Domain, it is adaptable to the application field such as energy storage, battery charging and discharging.
Background technology
Energy-storage system can stabilize the power swing of photovoltaic wind-power electricity generation generation, realize " peak load shifting " to electric energy, carry
The stability and economy of high Operation of Electric Systems, the operation to power network bring revolutionary impact.Battery energy storage has circulation
Efficiency high, change working are fast, less demanding power plant construction land used, geographical strong adaptability the characteristics of, be adapted to extensive stored energy application,
China's intelligent grid development will be greatly facilitated, with huge market prospects.
Battery energy storage system, mainly using centralized energy storing structure, battery pack connection in series-parallel is combined to form electricity both at home and abroad at present
Chi Dui and by single-stage AC/DC convertor direct grid-connected, it is simple in construction but higher is required to battery consistency, so as to increase electricity
Pond cost；Percentage of batteries energy-storage system uses distributed parallel-connection structure, but using power-sharing or according to battery SOC characteristic
Carry out power distribution, it is difficult to adapt to the secondary utilization occasion of the different battery of original state.
Utility model content
The purpose of this utility model is to overcome the defect of prior art problem there is provided a kind of battery energy storage system, is solved
The problems such as existing battery energy storage system requires height, high cost to battery consistency, it is adaptable to large-scale stored energy application.
According to the utility model there is provided a kind of battery energy storage system, including：
At least one energy-storage battery；
At least one battery energy storage converter；And
One central control unit；
Wherein, each energy-storage battery is connected with each battery energy storage converter respectively, at least one battery energy storage
The output end of converter is connected in parallel to grid-connected power network；
The central control unit is connected by communication network with each energy-storage battery and each battery energy storage converter
Connect.
Preferably, the energy-storage battery includes battery pack and battery management system (bms).
Preferably, the battery pack is using first use battery or uses the secondary old and useless battery used.
Preferably, the battery management system (bms) can carry out monomer battery voltage measurement, cell temperature survey,
Battery current measures, estimates battery charge state and cell health state and measurement data is uploaded into central control unit.
Preferably, the battery energy storage converter includes energy converter and control circuit.
Preferably, the energy converter adds DC-AC Two Stages circuits using DC-DC, realizes battery low pressure to electricity
The conversion of net high pressure.
Preferably, it is described control circuit include sampling module, lock phase module, closed loop control module, driving occur module and
Communication module；
Wherein, the sampling module to three-phase alternating voltage, three-phase alternating current, two-way DC converter input voltage,
DC voltage, DC current are sampled, and three-phase alternating voltage sampled value feeding lock phase module samples three-phase alternating current
Value, DC voltage sampled value, DC current sampled value feeding closed loop control module, three-phase alternating voltage sampled value, three are intersected
Flow current sampling data and DC voltage sampled value, DC current sampled value feeding communication module；
The lock phase module enters horizontal lock to three-phase alternating voltage sampled value, obtains the phase information of three-phase alternating voltage,
And acquired phase information is sent into closed loop control module and drive module；
Active power that the closed loop control module is exported to energy converter, reactive power are calculated, and respectively
Compared with the instruction of active power that central control unit is sent, reactive power instruction, the error amount feeding control of gained is calculated
Link, control calculates the instruction of link output watt current and referenced reactive current；
The closed loop control module carries out mathematic(al) manipulation using the phase information of three-phase alternating voltage to three-phase alternating current,
The exchange watt current being transformed under synchronous rotating frame is with exchanging reactive current, exchange watt current, exchange reactive current
Respectively compared with given exchange watt current command value, exchange referenced reactive current value, exchange watt current error is obtained
Value sends into control and calculates link with exchange reactive current error amount, control calculate link output exchange active modulation voltage and
Idle modulation voltage information is exchanged, module occurs for feeding DC-AC converter drivings；
The closed loop control module compares DC voltage command value and DC voltage detection value, and feeding control calculates ring
Section；Control calculates link output translator modulation voltage information, and sends into DC-DC converter driving generation module；
DC-AC converters driving occur module according to the alternating voltage phase of input, exchange active modulation voltage and
Exchange idle modulation voltage and produce corresponding drive signal, send into AC/DC converter；
The DC-DC converter driving occurs module and generates corresponding driving according to DC-DC converter modulation voltage information
Signal, sends into DC-DC converter；
Three-phase alternating voltage, three-phase alternating current, DC voltage, DC current information are uploaded to collection by the communication module
Middle control unit, and receive the active power instruction and reactive power instruction of central control unit transmission.
Preferably, the phase-lock technique of the lock phase module includes but is not limited to：Zero passage lock phase, DQ lock phases；
The control calculates link and uses a control algolithm, and the control algolithm includes but is not limited to：It is PI control algolithms, super
Preceding control algolithm；
The driving generating algorithm that module can be used according to AC/DC converter topology occurs for the DC-AC converters driving
Including but not limited to：SPWM modulation, SVPWM modulation or Multilevel modulation.
Preferably, the central control unit includes power distribution module, memory module and communication module；
Wherein, the power distribution module is uploaded according to energy-storage battery battery charge state and cell health state information
The energy that each energy-storage battery has been stored is calculated, the work(of each energy-storage battery is calculated according to each energy storage energy size
Rate distribution coefficient, and instruct the active power instruction for calculating each battery energy storage converter to refer to reactive power according to power dispatching
Order；
The memory module receives battery status information, the battery storage that each energy-storage battery is uploaded with battery energy storage converter
The job information of energy converter；
Cell voltage, temperature, electric current, battery charge state and the battery that the communication module receives energy-storage battery upload are strong
Health state, receives alternating voltage, alternating current, DC voltage and DC current information that battery energy storage converter is uploaded, to each
Individual battery energy storage converter sends active power instruction and instructed with reactive power.
A beneficial effect of the present utility model is：
The utility model uses distributed energy storage structure, and the independence for realizing separate unit battery is grid-connected, and according to respective battery
Each energy-storage battery power output of the big minor adjustment of energy storage energy, is adapted to the secondary utilization occasion of the different battery of state, has
Great market application foreground.
Brief description of the drawings
The utility model is described in further detail with example below in conjunction with the accompanying drawings：
Fig. 1 is the battery energy storage system schematic diagram according to the utility model preferred embodiment；
Fig. 2 is double active bridge circuit diagrams according to the utility model preferred embodiment；
Fig. 3 is the three-phase half-bridge circuit figure according to the utility model preferred embodiment.
Embodiment
Reference picture 1-3, the utility model provides a kind of battery energy storage system.
According to preferred embodiment of the present utility model, as shown in figure 1, it illustrates N（N≥1）Platform energy-storage battery, N platforms electricity
Pond energy storage converter and a central control unit, wherein, every energy-storage battery is connected with every battery energy storage converter, N
Platform battery energy storage converter output terminal is connected in parallel to grid-connected power network；Central control unit passes through communication network and each energy storage electricity
Pond, battery energy storage converter are connected.
Each energy-storage battery includes battery pack and battery management system (bms)（BMS）.
Each battery pack is using first use battery or uses the secondary old and useless battery used.
Battery management system (bms) can carry out monomer battery voltage measurement, cell temperature survey, battery current survey
Amount, estimation battery charge state（SOC）And cell health state（SOH）And measurement data is uploaded to central control unit.
Each battery energy storage converter includes energy converter and control circuit.
Each energy converter adds DC-AC Two Stages circuits using DC-DC, realizes battery low pressure to power network high pressure
Conversion, DC-DC circuit uses double active bridge translation circuits, as shown in Figure 2；DC-AC circuits use three-phase semi-bridge alternation circuit,
As shown in Figure 2.
Alternatively, DC-DC circuit can also use One Buck-Boost converter body or two-way phase whole-bridging circuit.
Alternatively, DC-AC circuits can also use three-phase tri-level circuit or three-phase multi-level circuit.
According to preferred embodiment of the present utility model, control circuit includes sampling module, lock phase module, closed-loop control mould
Module and communication module occur for block, driving.
Wherein, sampling module is to three-phase alternating voltage, three-phase alternating current, two-way DC converter input voltage, direct current
Voltage, DC current are sampled, by three-phase alternating voltage sampled value feeding lock phase module, by three-phase alternating current sampled value,
DC voltage sampled value, DC current sampled value feeding closed loop control module, by three-phase alternating voltage sampled value, three-phase alternating current
Flow sampled value and DC voltage sampled value, DC current sampled value feeding communication module.
Lock phase module enters horizontal lock to three-phase alternating voltage sampled value, obtains the phase information of three-phase alternating voltage, locks phase
Module locks phase using zero passage, locks the phase information feeding closed loop control module mutually obtained and drive module.
Alternatively, lock phase module can also lock phase using DQ.
Active power that closed loop control module is exported to energy converter, reactive power are calculated, and respectively with collection
The active power that middle control unit is sent is instructed, reactive power instruction compares, and the error amount feeding control of gained calculates link,
Control calculates the instruction of link output watt current and referenced reactive current.
Closed loop control module carries out mathematic(al) manipulation, conversion to three-phase alternating current using the phase information of three-phase alternating voltage
It is that the exchange watt current under synchronous rotating frame is distinguished with exchanging reactive current, exchange watt current, exchange reactive current
With given exchange watt current command value, exchange referenced reactive current value compared with, obtain exchange watt current error amount with
Reactive current error amount is exchanged, and sends into control and calculates link, control calculates link and uses PI control algolithms, and control calculates link
With exchanging idle modulation voltage information, feeding DC-AC converter drivings module occurs for the active modulation voltage of output exchange.
Closed loop control module compares DC voltage command value and DC voltage detection value, and feeding control calculates link；
Control calculates link and uses PI control algolithms, and control calculates link output translator modulation voltage information, and sends into DC-DC conversion
Module occurs for device driving.
Alternatively, control, which calculates link, can also use controls in advance algorithm.
The driving of DC-AC converters occurs module according to the alternating voltage phase of input, the active modulation voltage of exchange and exchanged
Idle modulation voltage produces corresponding drive signal, sends into AC/DC converter, and the driving of DC-AC converters occurs module and used
SPWM is modulated.
Alternatively, module occurs for the driving of DC-AC converters can also be modulated or Multilevel modulation using SVPWM.
DC-DC converter driving occurs module and generates corresponding drive signal according to DC-DC converter modulation voltage information,
Send into DC-DC converter.
Three-phase alternating voltage, three-phase alternating current, DC voltage, DC current information are uploaded to concentration control by communication module
Unit processed, and receive the active power instruction and reactive power instruction of central control unit transmission.
According to preferred embodiment of the present utility model, central control unit includes power distribution module, memory module and led to
Interrogate module；
Wherein, the SOC that power distribution module is uploaded according to energy-storage battery calculates each energy-storage battery with SOH information and stored
Energy, the power partition coefficient of each energy-storage battery is calculated according to each energy storage energy size, and according to power
The active power instruction that dispatch command calculates each battery energy storage converter is instructed with reactive power；
Memory module receives battery status information, the battery energy storage change that each energy-storage battery is uploaded with battery energy storage converter
The job information of parallel operation；
Communication module receives cell voltage, temperature, electric current, SOC and the SOH that energy-storage battery is uploaded, and receives battery energy storage and becomes
Alternating voltage, alternating current, DC voltage and DC current information that parallel operation is uploaded, being sent to each battery energy storage converter has
Work(power instruction is instructed with reactive power.
Above is preferable implementation of the present utility model is illustrated, but the utility model is created and is not limited to institute
Embodiment is stated, those of ordinary skill in the art can also make a variety of be equal on the premise of without prejudice to the utility model spirit
Deformation is replaced, and these equivalent modifications or replacement are all contained in the application claim limited range.
Claims (9)
1. a kind of battery energy storage system, it is characterised in that including：
At least one energy-storage battery；
At least one battery energy storage converter；And
One central control unit；
Wherein, each energy-storage battery is connected with each battery energy storage converter respectively, at least one battery energy storage conversion
The output end of device is connected in parallel to grid-connected power network；
The central control unit is connected by communication network with each energy-storage battery and each battery energy storage converter.
2. battery energy storage system according to claim 1, it is characterised in that the energy-storage battery includes battery pack and electricity
Pond EMS.
3. battery energy storage system according to claim 2, it is characterised in that the battery pack using first use battery or
Person uses the secondary old and useless battery used.
4. battery energy storage system according to claim 2, it is characterised in that the battery management system (bms) can be carried out
Monomer battery voltage measurement, cell temperature survey, battery current measurement, estimation battery charge state and battery health shape
State and measurement data is uploaded to central control unit.
5. battery energy storage system according to claim 1, it is characterised in that the battery energy storage converter includes can quantitative change
Changing device and control circuit.
6. battery energy storage system according to claim 5, it is characterised in that the energy converter is added using DC-DC
DC-AC Two Stages circuits, realize battery low pressure to the conversion of power network high pressure.
7. battery energy storage system according to claim 6, it is characterised in that the control circuit includes sampling module, lock
Module and communication module occur for phase module, closed loop control module, driving；
Wherein, the sampling module is to three-phase alternating voltage, three-phase alternating current, two-way DC converter input voltage, direct current
Voltage, DC current are sampled, by three-phase alternating voltage sampled value feeding lock phase module, by three-phase alternating current sampled value,
DC voltage sampled value, DC current sampled value feeding closed loop control module, by three-phase alternating voltage sampled value, three-phase alternating current
Flow sampled value and DC voltage sampled value, DC current sampled value feeding communication module；
The lock phase module enters horizontal lock to three-phase alternating voltage sampled value, obtains the phase information of three-phase alternating voltage, and will
Acquired phase information feeding closed loop control module and drive module；
Active power that the closed loop control module is exported to energy converter, reactive power are calculated, and respectively with collection
The active power that middle control unit is sent is instructed, reactive power instruction compares, and the error amount feeding control of gained calculates link,
Control calculates the instruction of link output watt current and referenced reactive current；
The closed loop control module carries out mathematic(al) manipulation, conversion to three-phase alternating current using the phase information of three-phase alternating voltage
It is that the exchange watt current under synchronous rotating frame is distinguished with exchanging reactive current, exchange watt current, exchange reactive current
With given exchange watt current command value, exchange referenced reactive current value compared with, obtain exchange watt current error amount with
Reactive current error amount is exchanged, and sends into control and calculates link, control calculates the active modulation voltage of link output exchange with exchanging
Module occurs for idle modulation voltage information, feeding DC-AC converter drivings；
The closed loop control module compares DC voltage command value and DC voltage detection value, and feeding control calculates link；
Control calculates link output translator modulation voltage information, and sends into DC-DC converter driving generation module；
The DC-AC converters driving occurs module according to the alternating voltage phase of input, the active modulation voltage of exchange and exchanged
Idle modulation voltage produces corresponding drive signal, sends into AC/DC converter；
The DC-DC converter driving occurs module and generates corresponding drive signal according to DC-DC converter modulation voltage information,
Send into DC-DC converter；
Three-phase alternating voltage, three-phase alternating current, DC voltage, DC current information are uploaded to concentration control by the communication module
Unit processed, and receive the active power instruction and reactive power instruction of central control unit transmission.
8. battery energy storage system according to claim 7, it is characterised in that
The phase-lock technique of the lock phase module includes but is not limited to：Zero passage lock phase, DQ lock phases；
The control calculates link and uses a control algolithm, and the control algolithm includes but is not limited to：PI control algolithms, advanced control
Algorithm processed；
The driving generating algorithm that the DC-AC converters driving occurs module and can used according to AC/DC converter topology includes
But it is not limited to：SPWM modulation, SVPWM modulation or Multilevel modulation.
9. battery energy storage system according to claim 1, it is characterised in that the central control unit includes power distribution
Module, memory module and communication module；
Wherein, the battery charge state and cell health state information that the power distribution module is uploaded according to energy-storage battery are calculated
The energy that each energy-storage battery has been stored, the power point of each energy-storage battery is calculated according to each energy storage energy size
Distribution coefficient, and instruct the active power instruction for calculating each battery energy storage converter to be instructed with reactive power according to power dispatching；
The memory module receives battery status information, the battery energy storage change that each energy-storage battery is uploaded with battery energy storage converter
The job information of parallel operation；
The communication module receives cell voltage, temperature, electric current, battery charge state and the battery health shape that energy-storage battery is uploaded
State, receives alternating voltage, alternating current, DC voltage and DC current information that battery energy storage converter is uploaded, to each electricity
Energy storage converter in pond sends active power instruction and instructed with reactive power.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621346818.XU CN206323146U (en) | 2016-12-08 | 2016-12-08 | A kind of battery energy storage system |
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| CN201621346818.XU CN206323146U (en) | 2016-12-08 | 2016-12-08 | A kind of battery energy storage system |
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| CN206323146U true CN206323146U (en) | 2017-07-11 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109494818A (en) * | 2017-09-11 | 2019-03-19 | 上海国际汽车城（集团）有限公司 | A kind of retired battery gradient utilization system of hot swap type and method |
| CN110854980A (en) * | 2018-08-21 | 2020-02-28 | 北京德意新能科技有限公司 | Intelligent battery power module applied to distributed energy storage system |
| CN110970935A (en) * | 2018-09-28 | 2020-04-07 | 南京南瑞继保电气有限公司 | Rapid power coordination control method and device for high-capacity battery energy storage system |
| WO2020107542A1 (en) * | 2018-11-30 | 2020-06-04 | 国网新源张家口风光储示范电站有限公司 | Energy control method and system for cascade utilization energy storage battery of energy storage unit |
| CN112467838A (en) * | 2020-11-23 | 2021-03-09 | 阳光电源股份有限公司 | Energy storage system, energy balance control method thereof and light-storage integrated multi-machine parallel system |
| CN114725966A (en) * | 2022-03-30 | 2022-07-08 | 西安奇点能源技术有限公司 | Distributed energy storage system and distributed energy storage control method |
| CN115173446A (en) * | 2021-04-02 | 2022-10-11 | 北京天启鸿源新能源科技有限公司 | Electrochemical energy storage system and centralized control device |
-
2016
- 2016-12-08 CN CN201621346818.XU patent/CN206323146U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109494818A (en) * | 2017-09-11 | 2019-03-19 | 上海国际汽车城（集团）有限公司 | A kind of retired battery gradient utilization system of hot swap type and method |
| CN110854980A (en) * | 2018-08-21 | 2020-02-28 | 北京德意新能科技有限公司 | Intelligent battery power module applied to distributed energy storage system |
| CN110970935A (en) * | 2018-09-28 | 2020-04-07 | 南京南瑞继保电气有限公司 | Rapid power coordination control method and device for high-capacity battery energy storage system |
| CN110970935B (en) * | 2018-09-28 | 2022-08-26 | 南京南瑞继保电气有限公司 | Rapid power coordination control method and device for high-capacity battery energy storage system |
| WO2020107542A1 (en) * | 2018-11-30 | 2020-06-04 | 国网新源张家口风光储示范电站有限公司 | Energy control method and system for cascade utilization energy storage battery of energy storage unit |
| CN112467838A (en) * | 2020-11-23 | 2021-03-09 | 阳光电源股份有限公司 | Energy storage system, energy balance control method thereof and light-storage integrated multi-machine parallel system |
| CN115173446A (en) * | 2021-04-02 | 2022-10-11 | 北京天启鸿源新能源科技有限公司 | Electrochemical energy storage system and centralized control device |
| CN114725966A (en) * | 2022-03-30 | 2022-07-08 | 西安奇点能源技术有限公司 | Distributed energy storage system and distributed energy storage control method |
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Effective date of registration: 20180328 Address after: 519000 Zhuhai City, Guangdong, Tang Jia Wan Town, Da Zhou Science Park, 13 Building Patentee after: ZHUHAI QINGYING INTELLIGENT POWER GRID RESEARCH INSTITUTE CO., LT.D Address before: 519080 A0228 unit A of the pioneering building of Qinghua science park, No. 101, Tangjia Wan Town, Guangdong Province Patentee before: Zhuhai Qing inggard Intelligent Equipment Co. Ltd. |
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Granted publication date: 20170711 Termination date: 20191208 |