CN103944249B - Multifunctional energy storage inverter system - Google Patents
Multifunctional energy storage inverter system Download PDFInfo
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- CN103944249B CN103944249B CN201310021198.7A CN201310021198A CN103944249B CN 103944249 B CN103944249 B CN 103944249B CN 201310021198 A CN201310021198 A CN 201310021198A CN 103944249 B CN103944249 B CN 103944249B
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Abstract
The invention belongs to the technical field of power energy storage inversion, and particularly relates to a multifunctional energy storage inversion system. The method comprises the following steps: the system comprises a photovoltaic and new energy power input end, a bidirectional inverter circuit, a protection and switch circuit, a power supply output power line, a charging and discharging module, a monitoring module, a B1 monitoring sensing circuit, a B2 monitoring sensing circuit, a control module, a system bus, a B1 electric control switch, a B2 electric control switch, a B1 storage battery pack and a B2 storage battery pack; the storage battery packs with 2 groups or more are arranged and monitored in real time through a monitoring module, so that the storage battery packs with corresponding charging and discharging states are controlled, and the whole charging or discharging process is independently carried out in the corresponding states; the multifunctional energy storage inverter system effectively realizes power generation, power storage, power supply, grid connection and grid disconnection, prolongs the service life of a storage battery, improves the reliability and safety of the energy storage inverter system, and enhances the robustness and black start capability of the energy storage inverter system.
Description
Technical field
The invention belongs to power energy storage inversion transformation technique field, be specifically related to a kind of multifunctional usage energy storage inversion system.
Background technology
New forms of energy electric power and the extensive application of micro-capacitance sensor, promote the development of energy storage inverter and system, and towards sending out
Electricity, electric power storage, power supply and grid-connected and that off-network is shared multifunctional usage energy storage inversion system direction are developed, and therefore occur in that on market
Many energy storage inverter products.As: inverter enterprise " sunlight power supply " company of world-renowned ABB AB and Chinese Famous
Product, provides support for the grid-connected of New-energy power system and networking and the power supply that generates electricity, is made that contribution.
But energy storage inverter and system product seen by prior art and market, be mainly based upon the UPS that energy storage is standby
Technology develops, and its energy storage section all uses a group storage battery to be connected to two-way inverter circuit DC terminal composition, and its shortcoming is:
When having load to need power supply, even accumulator positive is in charging, accumulator also can be transformed into the state carrying out discharging so that electric power storage
Pond group is not controlled by charge-discharge control circuit, has a strong impact on working healthily and the service life of accumulator；And,
In micro-capacitance sensor, energy storage inversion system mainly undertakes the power grid environment important task supporting micro-capacitance sensor, and single group storage battery set constructor is in accumulator
After electric discharge, require supplementation with certain electricity and just can make inverter circuit task again and power, this is because start voltage higher than putting
The minimum voltage that electricity is arranged, to this, if new forms of energy power generation is not enough or does not generates electricity, will affect inverter circuit and be again started up
With work, micro-capacitance sensor is even made to paralyse；And, energy storage inverter and system product seen by prior art and market, can't
Integration effectively realizes generating, electric power storage, power supply and grid-connected and that off-network is shared multifunctional usage energy storage inversion system, have impact on
The performance of system effectiveness.
Summary of the invention
For overcoming the drawbacks described above of prior art and product, the present invention proposes " a kind of multifunctional usage energy storage contravariant system
System ", its objective is to increase reliability and the safety of energy storage inversion system, strengthen robustness and the black starting-up of energy storage inversion system
Ability, effectively realizes multifunctional usage energy storage inversion system that generating, electric power storage, power supply and grid-connected and off-network share and improves system
The overall efficiency of system.
Concrete technical scheme is, a kind of multifunctional usage energy storage inversion system, including: photovoltaic and the input of new forms of energy electric power
End, two-way inverter circuit, protection and on-off circuit, power supply output power line, charging and discharging module, monitoring modular, B1 monitor biography
Inductive circuit, B2 monitoring sensing circuit, control module, system bus, B1 road electric-controlled switch, B2 road electric-controlled switch, B1 accumulator battery,
B2 accumulator battery；It is characterized in that:
Photovoltaic and new forms of energy electric power access photovoltaic and new forms of energy power input end and through two-way inverter circuit, protect and open
Close circuit and connect power supply output power line, constitute photovoltaic and new forms of energy AC Electric Power supply path；
Photovoltaic new energy electric power accesses photovoltaic and new forms of energy power input end, photovoltaic and new forms of energy power input end connect
Charging and discharging module also connects B1 accumulator battery through B1 monitoring sensing circuit and B1 road electric-controlled switch, and by photovoltaic and new forms of energy
Power input end connects charging and discharging module and connects B2 accumulator battery through B2 monitoring sensing circuit and B2 road electric-controlled switch, constitutes
Photovoltaic and new forms of energy power charge electric power storage path；
B1 accumulator battery connects B1 road electric-controlled switch and B1 monitors sensing circuit, and B2 accumulator battery connection B2 road is automatically controlled
Switch and B2 monitoring sensing circuit charged discharge module connect two-way inverter circuit, protection and on-off circuit, power supply output
Electric lines of force, constitutes battery discharging supply path；
Grid power accesses two-way inverter circuit, by two-way inversion by power supply output power line and protection and on-off circuit
Circuit connects charging and discharging module and connects B1 accumulator battery through B1 monitoring sensing circuit and B1 road electric-controlled switch, and by two-way
Inverter circuit connects charging and discharging module and connects B2 accumulator battery through B2 monitoring sensing circuit and B2 road electric-controlled switch, constitutes net
Electricity charging electric power storage path；
Control module connects monitoring modular and B1 monitoring sensing circuit and B2 monitors sensing circuit, constitutes accumulator monitoring road
Footpath；
Control module connects two-way inverter circuit, protection and on-off circuit, charging and discharging module, B1 by system bus
Road electric-controlled switch, B2 road electric-controlled switch, constitute and control and communication link；
Its main functional features constituted is:
1. set accumulator battery >=2 group, the charge capacity of each group storage battery >=average power consumption every day；
2. the power consumption of the average electricity consumption every day UP of the generating delivery >=power load of photovoltaic and new forms of energy electric power PV；
3. photovoltaic and new forms of energy electric power PV generating supply power load, accumulator and electrical network, i.e. meet photovoltaic and new forms of energy
Electric power PV preferentially powers, the controlled charge and discharge of accumulator, and electrical network is standby and controlled power supply；
4., when photovoltaic and new forms of energy electric power PV are not enough and do not generate electricity, electrical network G supplies electricity to power load and accumulator；
Its control method is:
System controller is monitored by monitoring modular and judges, when:
Photovoltaic and new forms of energy electric power PV ＞ 0, i.e. photovoltaic and new forms of energy electric power PV generating, then: PV direct-furnish inversion, electric power storage simultaneously
Mend electricity and at (PV+Bo) >=UP；Being now off-network pattern, when PV ＜ UP, Bo turns on, and Bi disconnects, and when PV >=UP, Bi leads
Logical, Bo disconnects；
When:
When (PV+Bo) ＜ UP, turn grid-connect mode, photovoltaic and new forms of energy electric power PV and electrical network G and jointly power for load UP；
Simultaneously when B1 Yu B2≤Vbi, i.e. B1, B2 are respectively less than equal to accumulator charging setting voltage value, electrical network G charges to B1 or B2；
When:
When photovoltaic and new forms of energy electric power PV≤0, i.e. photovoltaic and new forms of energy electric power PV are without electricity, then:
When B1 Yu B2 ＞ Vbo, when i.e. B1, B2 are all higher than battery discharging setting voltage value,
B1 or B2 → UP, accumulator is that power load is powered, i.e. B1o or B2o turns on；
And monitor accumulator electric-quantity, prevent overdischarge；
When B1 or B2 only has a group storage battery more than electric discharge setting voltage value Vbo,
G → UP, is converted to electrical network bypass and powers for load；
When B1 and B2 is respectively less than equal to accumulator charging setting voltage value Vbi, Bi1 or Bi2 turns on；
G → B1 or B2, electrical network is accumulator charging, and monitors accumulator electric-quantity, prevents from overcharging；
Bi is charging accumulator group, and Bo is electric discharge accumulator battery, and B1 accumulator battery, B2 accumulator battery, G is electrical network, and UP is
Power load, → for power supply relation, Bo1 is that B1 accumulator battery is in discharge condition, and Bi1 is that B1 accumulator battery is in charging shape
State, the rest may be inferred；
Bo turns on, and accumulator battery B being i.e. in discharge condition connects electric discharge bus and turns on；
Bi turns on, and accumulator battery B being i.e. in charged state connects charging bus and turns on；
Battery discharging setting voltage value Vbo and accumulator charging setting voltage value Vbi wants according to accumulator product specification
Ask setting；
Bo normality is conducting, and Bi is for disconnecting, and control module is passed by monitoring modular and B1 monitoring sensing circuit and B2 monitoring
Inductive circuit monitors B1 accumulator battery and the state of B2 accumulator battery in real time, and determines that it is currently for charged state or electric discharge shape
State, when charging and discharging module discharge is load supplying, keeps normality Bo for conducting, and Bi is for disconnecting, when PV ＞ UP, charging and discharging
When module has charging power, disconnect Bo, turn on Bi.
The present invention utilizes and arranges 2 groups and above accumulator battery and monitor the current of accumulator in real time by monitoring modular
Residing charge or discharge state, and the charging and discharging demand according to charging and discharging module, control the electric power storage of corresponding state
Group conducting in pond accesses charging and discharging module, it is achieved the accumulator battery of corresponding charging and discharging state is controlled and in corresponding state
The lower overall process independently carrying out filling or discharging；Can also utilize and control the electricity difference of different conditions between accumulator battery, it is ensured that
Inverter circuit is in all the time and can start electricity and range of voltage values, substantially increases the life-span of accumulator, adds energy storage inversion
The reliability of system and safety, enhance robustness and the black start-up ability of energy storage inversion system；And system one can be made
Body, effectively realizes generating, electric power storage, power supply and grid-connected and that off-network is shared multifunctional usage energy storage inversion system, significantly carries
High system effectiveness.
Accompanying drawing explanation
Fig. 1 is the energy storage inversion system principle of work and power schematic diagram of prior art；
Fig. 2 is a kind of multifunctional usage energy storage inversion system principle of work and power schematic diagram.
Detailed description of the invention
As examples of implementation, in conjunction with accompanying drawing, a kind of multifunctional usage energy storage inversion system is described, but, the present invention
Technology be not limited to, with scheme, the content that the present embodiment provides.
Accompanying drawing 1 gives the energy storage inversion system principle of work and power schematic diagram of prior art, shown in figure, and the storage of prior art
A group storage battery can be used to be connected to two-way inverter circuit DC terminal composition by inversion system, its shortcoming is: need power supply there being load
Time, even accumulator positive is in charging, accumulator also can be transformed into the state carrying out discharging so that accumulator battery is not subject to
The control of charge-discharge control circuit, has a strong impact on working healthily and the service life of accumulator.
Fig. 2 gives a kind of multifunctional usage energy storage inversion system principle of work and power schematic diagram, and shown in figure, the present invention proposes
A kind of multifunctional usage energy storage inversion system, including: photovoltaic and new forms of energy power input end (1), two-way inverter circuit (2),
Protection and on-off circuit (3), power supply output power line (4), charging and discharging module (5), monitoring modular (6), B1 monitoring sensing electricity
Road (6a), B2 monitoring sensing circuit (6b), control module (7), system bus (8), B1 road electric-controlled switch (9a), B2 road is automatically controlled opens
Close (9b), B1 accumulator battery (10a), B2 accumulator battery (10b)；It is characterized in that:
Photovoltaic and new forms of energy electric power access photovoltaic and new forms of energy power input end (1) and through two-way inverter circuit (2), guarantor
Protect and on-off circuit (3) connects power supply output power line (4), constitute photovoltaic electric power Alternating Current Power Supply path；
Photovoltaic and new forms of energy electric power access photovoltaic and new forms of energy power input end (1), photovoltaic and new forms of energy electric power input
End (1) connects charging and discharging module (5) and connects B1 accumulator through B1 monitoring sensing circuit (6a) and B1 road electric-controlled switch (9a)
Group (10a), and connected charging and discharging module (5) by photovoltaic and new forms of energy power input end (1) and monitor sensing circuit through B2
(6b) and B2 road electric-controlled switch (9b) connects B2 accumulator battery (10b), photovoltaic and new forms of energy power charge electric power storage path are constituted；
B1 accumulator battery (10a) connects B1 road electric-controlled switch (9a) and B1 monitoring sensing circuit (6a), and B2 accumulator
Group (10b) connects B2 road electric-controlled switch (9b) and B2 monitoring sensing circuit (6b) and charged discharge module (5) connects two-way inverse
Power transformation road (2), protection and on-off circuit (3), power supply output power line (4), constitute battery discharging supply path；
Grid power accesses two-way inverter circuit (2) by power supply output power line (4) and protection and on-off circuit (3),
Charging and discharging module (5) is connected and through B1 monitoring sensing circuit (6a) and B1 road electric-controlled switch (9a) by two-way inverter circuit (2)
Connect B1 accumulator battery (10a), and connected charging and discharging module (5) and through B2 monitoring sensing electricity by two-way inverter circuit (2)
Road (6b) and B2 road electric-controlled switch (9b) connect B2 accumulator battery (10b), constitute net electricity charging electric power storage path；
Control module (7) connects monitoring modular (6) and B1 monitoring sensing circuit (6a) and B2 monitoring sensing circuit (6b), structure
Become accumulator monitoring path；
Control module (7) connects two-way inverter circuit (2), protection and on-off circuit (3), charging by system bus (8)
Discharge module (5), B1 road electric-controlled switch (9a), B2 road electric-controlled switch (9b), constitute and control and communication link；
Its main functional features constituted is:
1. set accumulator battery >=2 group, the charge capacity of each group storage battery >=average power consumption every day；
2. the power consumption of the average electricity consumption every day UP of the generating delivery >=power load of photovoltaic and new forms of energy electric power PV；
3. photovoltaic and new forms of energy electric power PV generating supply power load, accumulator and electrical network, i.e. meet photovoltaic and new forms of energy
Electric power PV preferentially powers, the controlled charge and discharge of accumulator, and electrical network is standby and controlled power supply；
4., when photovoltaic and new forms of energy electric power PV are not enough and do not generate electricity, electrical network G supplies electricity to power load and accumulator；
Its control method is:
System controller is monitored by monitoring modular and judges, when:
Photovoltaic and new forms of energy electric power PV ＞ 0, i.e. photovoltaic and new forms of energy electric power PV generating, then: PV direct-furnish inversion, electric power storage simultaneously
Mend electricity and at (PV+Bo) >=UP；Being now off-network pattern, when PV ＜ UP, Bo turns on, and Bi disconnects, and when PV >=UP, Bi leads
Logical, Bo disconnects；
When:
When (PV+Bo) ＜ UP, turn grid-connect mode, photovoltaic and new forms of energy electric power PV and electrical network G and jointly power for load UP；
Simultaneously when B1 Yu B2≤Vbi, i.e. B1, B2 are respectively less than equal to accumulator charging setting voltage value, electrical network G charges to B1 or B2；
When:
When photovoltaic and new forms of energy electric power PV≤0, i.e. photovoltaic and new forms of energy electric power PV are without electricity, then:
When B1 Yu B2 ＞ Vbo, when i.e. B1, B2 are all higher than battery discharging setting voltage value,
B1 or B2 → UP, accumulator is that power load is powered, i.e. B1o or B2o turns on；
And monitor accumulator electric-quantity, prevent overdischarge；
When B1 or B2 only has a group storage battery more than electric discharge setting voltage value Vbo,
G → UP, is converted to electrical network bypass and powers for load；
When B1 and B2 is respectively less than equal to accumulator charging setting voltage value Vbi, Bi1 or Bi2 turns on；
G → B1 or B2, electrical network is accumulator charging, and monitors accumulator electric-quantity, prevents from overcharging；
Bi is charging accumulator group, and Bo is electric discharge accumulator battery, and B1 accumulator battery (10a), B2 accumulator battery (10b), G is
Electrical network, UP is power load, → for power supply relation, Bo1 is that B1 accumulator battery (10a) is in discharge condition, and Bi1 is B1 accumulator
Group (10a) is in charged state, and the rest may be inferred；
Bo turns on, and accumulator battery B being i.e. in discharge condition connects electric discharge bus and turns on；
Bi turns on, and accumulator battery B being i.e. in charged state connects charging bus and turns on；
Battery discharging setting voltage value Vbo and accumulator charging setting voltage value Vbi wants according to accumulator product specification
Ask setting；
Bo normality is conducting, and Bi is for disconnecting, and control module (7) is by monitoring modular (6) and B1 monitoring sensing circuit (6a)
Monitor B1 accumulator battery (10a) and the state of B2 accumulator battery (10b) with B2 monitoring sensing circuit (6b) in real time, and determine that it is
Current is charged state or discharge condition, and when charging and discharging module (5) electric discharge is for load supplying, keeping normality Bo is conducting,
Bi is for disconnecting, and as PV ＞ UP, when charging and discharging module (5) has charging power, disconnects Bo, turns on Bi.
By the enforcement of the technical program, effectively realize that generating, electric power storage, power supply and grid-connected and off-network share is multi-functional
Purposes energy storage inversion system, not only increases the life-span of accumulator, also add reliability and the safety of energy storage inversion system,
Enhance robustness and the black start-up ability of energy storage inversion system.
Claims (1)
1. a multifunctional usage energy storage inversion system, including: photovoltaic and new forms of energy power input end (1), two-way inverter circuit
(2), protection and on-off circuit (3), output power line (4) of powering, charging and discharging module (5), monitoring modular (6), B1 monitor biography
Inductive circuit (6a), B2 monitoring sensing circuit (6b), control module (7), system bus (8), B1 road electric-controlled switch (9a), B2 road electricity
Control switch (9b), B1 accumulator battery (10a), B2 accumulator battery (10b)；It is characterized in that:
Photovoltaic and new forms of energy electric power access photovoltaic and new forms of energy power input end (1) and through two-way inverter circuit (2), protection and
On-off circuit (3) connects power supply output power line (4), constitutes photovoltaic and new forms of energy AC Electric Power supply path；
Photovoltaic and new forms of energy electric power access photovoltaic and new forms of energy power input end (1), by photovoltaic and new forms of energy power input end (1)
Connect charging and discharging module (5) and connect B1 accumulator battery through B1 monitoring sensing circuit (6a) and B1 road electric-controlled switch (9a)
(10a), and by photovoltaic and new forms of energy power input end (1) connect charging and discharging module (5) and monitor sensing circuit through B2
(6b) and B2 road electric-controlled switch (9b) connects B2 accumulator battery (10b), photovoltaic and new forms of energy power charge electric power storage path are constituted；
B1 accumulator battery (10a) connects B1 road electric-controlled switch (9a) and B1 monitoring sensing circuit (6a), and B2 accumulator battery
(10b) connect B2 road electric-controlled switch (9b) and B2 monitoring sensing circuit (6b) and charged discharge module (5) connects two-way inversion
Circuit (2), protection and on-off circuit (3), power supply output power line (4), constitute battery discharging supply path；
Grid power accesses two-way inverter circuit (2), by double by power supply output power line (4) and protection and on-off circuit (3)
Connect charging and discharging module (5) to inverter circuit (2) and connect through B1 monitoring sensing circuit (6a) and B1 road electric-controlled switch (9a)
B1 accumulator battery (10a), and connected charging and discharging module (5) by two-way inverter circuit (2) and monitor sensing circuit through B2
(6b) and B2 road electric-controlled switch (9b) connect B2 accumulator battery (10b), constitute net electricity charging electric power storage path；
Control module (7) connects monitoring modular (6) and B1 monitoring sensing circuit (6a) and B2 monitoring sensing circuit (6b), constitutes
Accumulator monitoring path；
Control module (7) connects two-way inverter circuit (2), protection and on-off circuit (3), charging and discharging by system bus (8)
Module (5), B1 road electric-controlled switch (9a), B2 road electric-controlled switch (9b), constitute and control and communication link；
Its main functional features constituted is:
(1). set accumulator battery >=2 group, the charge capacity of each group storage battery >=average power consumption every day；
(2). the power consumption of the average electricity consumption every day UP of the generating delivery >=power load of Photovoltaic new energy electric power PV；
(3). photovoltaic and new forms of energy electric power PV generating supply power load, accumulator and electrical network, i.e. meet photovoltaic and new forms of energy electricity
Power PV is preferentially powered, the controlled charge and discharge of accumulator, and electrical network is standby and controlled power supply；
(4). when photovoltaic and new forms of energy electric power PV are not enough and do not generate electricity, electrical network G supplies electricity to power load and accumulator；Its controlling party
Method is:
System controller is monitored by monitoring modular and judges, when:
Photovoltaic and new forms of energy electric power PV ＞ 0, i.e. photovoltaic and new forms of energy electric power PV generating, then: PV direct-furnish inversion, electricity is mended in electric power storage simultaneously
And at (PV+Bo) >=UP, it is now off-network pattern；When PV ＜ UP, Bo turns on, and Bi disconnects, and when PV >=UP, Bi turns on,
Bo disconnects；
When:
When (PV+Bo) ＜ UP, turn grid-connect mode, photovoltaic and new forms of energy electric power PV and electrical network G and jointly power for load UP；Simultaneously
When B1 Yu B2≤Vbi, i.e. B1, B2 are respectively less than equal to accumulator charging setting voltage value, electrical network G charges to B1 or B2；
When:
When photovoltaic and new forms of energy electric power PV≤0, i.e. photovoltaic and new forms of energy electric power PV are without electricity, then:
When B1 Yu B2 ＞ Vbo, when i.e. B1, B2 are all higher than battery discharging setting voltage value,
B1 or B2 → UP, accumulator is that power load is powered, i.e. B1o or B2o turns on；
And monitor accumulator electric-quantity, prevent overdischarge；
When B1 or B2 only has a group storage battery more than electric discharge setting voltage value Vbo,
G → UP, is converted to electrical network bypass and powers for load；
When B1 and B2 is respectively less than equal to accumulator charging setting voltage value Vbi, Bi1 or Bi2 turns on；
G → B1 or B2, electrical network is accumulator charging, and monitors accumulator electric-quantity, prevents from overcharging；
Bi is charging accumulator group, and Bo is electric discharge accumulator battery, B1 accumulator battery (10a), B2 accumulator battery (10b), and G is electricity
Net, UP is power load, → for power supply relation, Bo1 is that B1 accumulator battery (10a) is in discharge condition, and Bi1 is B1 accumulator battery
(10a) being in charged state, the rest may be inferred；
Bo turns on, and accumulator battery B being i.e. in discharge condition connects electric discharge bus and turns on,
Bi turns on, and accumulator battery B being i.e. in charged state connects charging bus and turns on,
Battery discharging setting voltage value Vbo and accumulator charging setting voltage value Vbi sets according to accumulator product specification requirement
Fixed；
Bo normality is conducting, and Bi is for disconnecting, and control module (7) is by monitoring modular (6) and B1 monitoring sensing circuit (6a) and B2
Monitoring sensing circuit (6b) monitoring B1 accumulator battery (10a) and the state of B2 accumulator battery (10b) in real time, and determine that it is current
For charged state or discharge condition, when charging and discharging module (5) electric discharge is for load supplying, keeping normality Bo for conducting, Bi is
Disconnect, as PV ＞ UP, when charging and discharging module (5) has charging power, disconnect Bo, turn on Bi.
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| CN106169622A (en) * | 2016-07-21 | 2016-11-30 | 上海致远绿色能源股份有限公司 | It is applicable to management method for storage battery group and the device of wind-solar-diesel complementary electricity generation system |
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| JPH1031525A (en) * | 1996-07-15 | 1998-02-03 | Fuji Electric Co Ltd | Photovoltaic power generation system |
| KR101093956B1 (en) * | 2009-12-04 | 2011-12-15 | 삼성에스디아이 주식회사 | Energy Storage System |
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| CN101931238A (en) * | 2010-04-29 | 2010-12-29 | 浙江省电力试验研究院 | Master-slave strategy-based microgrid system coordination control method |
| CN102751745A (en) * | 2011-04-18 | 2012-10-24 | 周锡卫 | System and method for power supply of solar power generation |
| CN102215012A (en) * | 2011-06-07 | 2011-10-12 | 天宝电子（惠州）有限公司 | Bidirectional transformation system of solar energy and electric energy |
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