CN106712090A - Modular photovoltaic energy-storage inverter - Google Patents
Modular photovoltaic energy-storage inverter Download PDFInfo
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- CN106712090A CN106712090A CN201710044863.2A CN201710044863A CN106712090A CN 106712090 A CN106712090 A CN 106712090A CN 201710044863 A CN201710044863 A CN 201710044863A CN 106712090 A CN106712090 A CN 106712090A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 19
- 238000004891 communication Methods 0.000 claims abstract description 13
- 230000003993 interaction Effects 0.000 claims description 14
- 238000005070 sampling Methods 0.000 claims description 9
- 230000009467 reduction Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 230000002457 bidirectional effect Effects 0.000 abstract 4
- 238000010586 diagram Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
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- H02J3/383—
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a modular photovoltaic energy-storage inverter, comprising a DC/DC converter, one or more bidirectional DC/DC converter, a bidirectional DC/AC converter and an energy management unit. Each converter comprises an independent controller; a photovoltaic unit and a storage battery are connected to a DC bus through the DC/DC converter and the bidirectional DC/DC converter respectively; the DC bus is connected with loads and a power grid through the bidirectional DC/AC converter; and all of the converters are connected with the energy management unit through a communication bus. The system can work in a grid-connected mode or an independent mode according to the state of the power grid; and the system is highly modular, easy to maintain, wide in application range and high in reliability, and meanwhile, can utilize solar energy to the maximum degree, realized self-generating self-supply of the energy and saves power consumption cost.
Description
Technical field
The invention belongs to photovoltaic energy storage inverter technology field, it is related to a kind of family photovoltaic energy-storage system, it is specifically a kind of
Modular photovoltaic energy storage inverter.
Background technology
Currently, global energy is in short supply, and the development of emerging energy industry is imperative, but the clean energy resource such as wind energy, solar energy
Affected by environment larger, the unstable stability to power network of power is impacted, and causes traditional power network largely to carry, largely
Energy is wasted, and energy storage and photovoltaic are effectively combined into application, can effectively solve this series of problems.Photovoltaic energy storage inverter
Solar energy preferentially is used, when solar energy is not enough, battery electric energy can be just used, when battery and photovoltaic electric energy are all inadequate
When, just using power network electric energy, solar energy is maximally utilised to reach, realize generating power for their own use, the purpose of using electricity wisely cost.
The content of the invention
It is an object of the invention to provide a kind of reliability is high, easy care, the Modular photovoltaic energy storage that has a wide range of application it is inverse
Become device.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of Modular photovoltaic energy storage inverter, including a DC/DC converter, one or more two-way DC/DC conversion
Device, a two-way DC/AC converter and an energy management unit；
The DC/DC converters connect photovoltaic, the two-way DC/DC converters connection battery, the DC/DC converters
Dc bus is incorporated into the two-way DC/DC converters other end, the dc bus is negative by being connected after two-way DC/AC converters
Carry and power network；
The DC/DC converters are used for the electric energy in photovoltaic directly or through being incorporated to dc bus after boosting；
The two-way DC/DC converters are used for electric energy in battery by being incorporated to dc bus after boosting, or by direct current
Electric energy is by being filled with battery in bus after step-down；
The two-way DC/AC converters be used for by direct current energy inversion in dc bus be AC energy after be connected to the grid with
And important load is supplied to, or dc bus will be incorporated to after AC energy rectification in power network in case charging a battery；
The DC/DC converters, two-way DC/DC converters and two-way DC/AC converters pass through communication bus and energy
Amount administrative unit connection；
The energy management unit is used to manage DC/DC converters, two-way DC/DC converters and two-way DC/AC converters
Running status.
Further, the DC/DC converters, two-way DC/DC converters, two-way DC/AC converters and energy management
Unit is respectively provided with independent control.
Further, the DC/DC converters include the first independent control, the first sampling control circuit, the first communication
Circuit, the first auxiliary power circuit and the first main booster circuit.
Further, the two-way DC/DC converters include the second independent control, the second sampling control circuit, second
Communicating circuit, the second auxiliary power circuit, the second main booster circuit and main reduction voltage circuit.
Further, the two-way DC/AC converters include the 3rd independent control, the 3rd sampling control circuit, the 3rd
Communicating circuit, the 3rd auxiliary power circuit and off-network switching circuit and main inversion filter circuit.
Further, the energy management unit includes the 4th independent control, communication module and human-computer interaction module；
The communication module is used to be carried out with DC/DC converters, two-way DC/DC converters and two-way DC/AC converters
Communication, the running state data of timing acquisition DC/DC converters, two-way DC/DC converters and two-way DC/AC converters, output
To the 4th independent control；
4th independent control carries out calculation process, output to human-computer interaction module, while according to man-machine to data
The control instruction of interactive module, start and stop or energy are sent to DC/DC converters, two-way DC/DC converters and two-way DC/AC converters
Amount dispatch command, realizes the co-ordination of DC/DC converters, two-way DC/DC converters and two-way DC/AC converters；
The human-computer interaction module is used to show the running status of each converter, and operating personnel pass through human-computer interaction module
Each converter is controlled manually.
Beneficial effects of the present invention：The photovoltaic energy storage inverter that the present invention is provided, its internal each converter is all safety
Modularization, with independent controller, system altitude modularization, reliability is high, it is easy to safeguard；System can be according to electric network state
Be operated under grid-connect mode or stand-alone mode, and with generating power for their own use, zero feedback net, various application models such as timing discharge and recharge,
Have a wide range of application；Solar energy can be maximally utilised simultaneously, generating power for their own use for energy, using electricity wisely cost is realized.
Brief description of the drawings
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
Fig. 1 is system schematic of the invention.
Fig. 2 is the circuit diagram of DC/DC converters of the present invention.
Fig. 3 is the circuit diagram of two-way DC/DC converters of the invention.
Fig. 4 is the circuit diagram of two-way DC/AC converters of the invention.
Fig. 5 is energy management unit schematic diagram of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is all other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
As shown in figure 1, the invention provides a kind of Modular photovoltaic energy storage inverter, including a DC/DC converter, one
Individual two-way DC/DC converters, a two-way DC/AC converter and an energy management unit, DC/DC converters connection light
Volt, two-way DC/DC converters connect battery, and it is female that DC/DC converters and the two-way DC/DC converters other end are incorporated into direct current
Line, dc bus by after two-way DC/AC converters connect load and power network, DC/DC converters, two-way DC/DC converters with
And two-way DC/AC converters are connected by communication bus with energy management unit.
As shown in Fig. 2 DC/DC converters connection photovoltaic and dc bus, for by photovoltaic electric flux directly or
By being incorporated to dc bus after boosting.DC/DC converters include that the first independent control, the first sampling control circuit, first are led to
News circuit, the first auxiliary power circuit and the first main booster circuit；Wherein, the first main booster circuit rises piezoelectricity using BOOST
Road.
As shown in figure 3, the two-way connection of DC/DC converters battery and dc bus, during electric discharge, two-way DC/DC converters
By electric energy in battery by being incorporated to dc bus after boosting；During charging, two-way DC/DC converters pass through electric energy in dc bus
Battery is filled with after crossing step-down.Two-way DC/DC converters include that the second independent control, the second sampling control circuit, second are led to
News circuit, the second auxiliary power circuit, the second main booster circuit and main reduction voltage circuit；Wherein, the second main booster circuit is used
BOOST booster circuits, main reduction voltage circuit uses BUCK reduction voltage circuits.
As shown in figure 4, two-way DC/AC converters connection dc bus and important load and power network, during electric discharge, two-way DC/
Direct current energy inversion in dc bus is to be connected to the grid after AC energy and be supplied to important load by AC converters；Charge
When, two-way DC/AC converters will be incorporated to dc bus in case charging a battery after AC energy rectification in power network.Two-way DC/
AC converters include the 3rd independent control, the 3rd sampling control circuit, the 3rd communicating circuit, the 3rd auxiliary power circuit and
Off-network switching circuit and main inversion filter circuit；Wherein, main inversion filter circuit uses H full-bridge inverter circuit and LC filtered electricals
Road.
When power network is by failure, two-way DC/AC converters are run in the independent mode to weight by simultaneously off-network switching circuit
Want load supplying；When power system restoration is normal, two-way DC/AC converters operate in grid-connect mode by simultaneously off-network switching circuit
Under.
As shown in figure 5, energy management unit includes the 4th independent control, communication module and human-computer interaction module, energy
Amount administrative unit is led to by communication module with DC/DC converters, two-way DC/DC converters and two-way DC/AC converters
Letter, the running status number of communication module timing acquisition DC/DC converters, two-way DC/DC converters and two-way DC/AC converters
According to, output to the 4th independent control, the 4th independent control carries out calculation process to data, and human-computer interaction module is arrived in output,
Simultaneously according to the control instruction of human-computer interaction module, to DC/DC converters, two-way DC/DC converters and two-way DC/AC converters
Start and stop or energy dispatch command are sent, the coordination of DC/DC converters, two-way DC/DC converters and two-way DC/AC converters is realized
Work；Human-computer interaction module is used to show the running status of each converter, and operating personnel are by human-computer interaction module to each
Converter is controlled manually.
The photovoltaic energy storage inverter that the present invention is provided, its internal each converter is all security module, with independent
Controller, system altitude modularization, reliability is high, it is easy to safeguard；System can according to electric network state be operated in grid-connect mode or
Under person's stand-alone mode, and with generating power for their own use, zero feedback net, various application models such as timing discharge and recharge, have a wide range of application；Simultaneously can
Maximally utilise solar energy, realize generating power for their own use for energy, using electricity wisely cost.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means
Specific features, structure, material or the feature described with reference to the embodiment or example are contained at least one implementation of the invention
In example or example.In this manual, the schematic representation to above-mentioned term is not necessarily referring to identical embodiment or example.
And, the specific features of description, structure, material or feature can be in one or more any embodiments or example closing
Suitable mode is combined.
Above content is only to structure example of the present invention and explanation, affiliated those skilled in the art couple
Described specific embodiment is made various modifications or supplement or is substituted using similar mode, without departing from invention
Structure surmounts scope defined in the claims, all should belong to protection scope of the present invention.
Claims (6)
1. a kind of Modular photovoltaic energy storage inverter, it is characterised in that：Including a DC/DC converter, one or more are two-way
DC/DC converters, a two-way DC/AC converter and an energy management unit；
The DC/DC converters connect photovoltaic, the two-way DC/DC converters connection battery, DC/DC converters and double
Be incorporated into dc bus to the DC/DC converter other ends, the dc bus by connected after two-way DC/AC converters load and
Power network；
The DC/DC converters are used for the electric energy in photovoltaic directly or through being incorporated to dc bus after boosting；
The two-way DC/DC converters are used for electric energy in battery by being incorporated to dc bus after boosting, or by dc bus
Middle electric energy is by being filled with battery after step-down；
The two-way DC/AC converters are used for direct current energy inversion in dc bus to be connected to the grid and carrying after AC energy
Supply important load, or dc bus will be incorporated to after AC energy rectification in power network in case charging a battery；
The DC/DC converters, two-way DC/DC converters and two-way DC/AC converters pass through communication bus and energy pipe
Reason unit connection；
The energy management unit is used to manage the fortune of DC/DC converters, two-way DC/DC converters and two-way DC/AC converters
Row state.
2. a kind of Modular photovoltaic energy storage inverter according to claim 1, it is characterised in that：The DC/DC converters,
Two-way DC/DC converters, two-way DC/AC converters and energy management unit are respectively provided with independent control.
3. a kind of Modular photovoltaic energy storage inverter according to claim 2, it is characterised in that：The DC/DC converters
Including the first independent control, the first sampling control circuit, the first communicating circuit, the first auxiliary power circuit and the first main liter
Volt circuit.
4. a kind of Modular photovoltaic energy storage inverter according to claim 2, it is characterised in that：The two-way DC/DC becomes
Parallel operation includes the second independent control, the second sampling control circuit, the second communicating circuit, the second auxiliary power circuit, the second master
Booster circuit and main reduction voltage circuit.
5. a kind of Modular photovoltaic energy storage inverter according to claim 2, it is characterised in that：The two-way DC/AC becomes
Parallel operation includes the 3rd independent control, the 3rd sampling control circuit, the 3rd communicating circuit, the 3rd auxiliary power circuit and off-network
Switching circuit and main inversion filter circuit.
6. a kind of Modular photovoltaic energy storage inverter according to claim 2, it is characterised in that：The energy management unit
Including the 4th independent control, communication module and human-computer interaction module；
The communication module is used to be communicated with DC/DC converters, two-way DC/DC converters and two-way DC/AC converters,
The running state data of timing acquisition DC/DC converters, two-way DC/DC converters and two-way DC/AC converters, output to the 4th
Independent control；
4th independent control carries out calculation process, output to human-computer interaction module, while according to man-machine interaction to data
The control instruction of module, sends start and stop or energy is adjusted to DC/DC converters, two-way DC/DC converters and two-way DC/AC converters
Degree instruction, realizes the co-ordination of DC/DC converters, two-way DC/DC converters and two-way DC/AC converters；
The human-computer interaction module is used to show the running status of each converter, and operating personnel are by human-computer interaction module to each
Individual converter is controlled manually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710044863.2A CN106712090A (en) | 2017-01-20 | 2017-01-20 | Modular photovoltaic energy-storage inverter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710044863.2A CN106712090A (en) | 2017-01-20 | 2017-01-20 | Modular photovoltaic energy-storage inverter |
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| CN106712090A true CN106712090A (en) | 2017-05-24 |
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| CN201710044863.2A Pending CN106712090A (en) | 2017-01-20 | 2017-01-20 | Modular photovoltaic energy-storage inverter |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108063455A (en) * | 2017-12-11 | 2018-05-22 | 江苏辉伦太阳能科技有限公司 | One kind is from grid-connected photovoltaic energy storage inverter Poewr control method |
| CN108695841A (en) * | 2018-06-08 | 2018-10-23 | 哈尔滨工程大学 | A kind of low-power independent photovoltaic generating system control method and its main circuit |
| CN109842318A (en) * | 2017-11-28 | 2019-06-04 | 大连融慧能源科技有限公司 | Cell power module, vanadium redox flow battery energy storage system and its Poewr control method |
| CN109950924A (en) * | 2017-12-26 | 2019-06-28 | 斯贝兰德工程技术（北京）有限公司 | A kind of photovoltaic energy storage inversion power supply system |
| CN111245021A (en) * | 2020-03-19 | 2020-06-05 | 阳光电源股份有限公司 | Grid-connected and off-grid hybrid inverter |
| CN113746131A (en) * | 2021-08-06 | 2021-12-03 | 万帮数字能源股份有限公司 | Inverter parallel system and zero feed network control method thereof |
| CN113922440A (en) * | 2021-09-06 | 2022-01-11 | 珠海格力电器股份有限公司 | Energy storage system control method and device, energy storage system and energy storage equipment |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109842318A (en) * | 2017-11-28 | 2019-06-04 | 大连融慧能源科技有限公司 | Cell power module, vanadium redox flow battery energy storage system and its Poewr control method |
| CN109842318B (en) * | 2017-11-28 | 2020-11-20 | 大连融慧能源科技有限公司 | Unit power module, vanadium redox flow battery energy storage system and power control method thereof |
| CN108063455A (en) * | 2017-12-11 | 2018-05-22 | 江苏辉伦太阳能科技有限公司 | One kind is from grid-connected photovoltaic energy storage inverter Poewr control method |
| CN108063455B (en) * | 2017-12-11 | 2021-05-18 | 江苏辉伦太阳能科技有限公司 | Off-grid and grid-connected photovoltaic energy storage inverter power control method |
| CN109950924A (en) * | 2017-12-26 | 2019-06-28 | 斯贝兰德工程技术（北京）有限公司 | A kind of photovoltaic energy storage inversion power supply system |
| CN108695841A (en) * | 2018-06-08 | 2018-10-23 | 哈尔滨工程大学 | A kind of low-power independent photovoltaic generating system control method and its main circuit |
| CN111245021A (en) * | 2020-03-19 | 2020-06-05 | 阳光电源股份有限公司 | Grid-connected and off-grid hybrid inverter |
| CN113746131A (en) * | 2021-08-06 | 2021-12-03 | 万帮数字能源股份有限公司 | Inverter parallel system and zero feed network control method thereof |
| CN113746131B (en) * | 2021-08-06 | 2023-11-03 | 万帮数字能源股份有限公司 | Inverter parallel system and zero feed network control method thereof |
| CN113922440A (en) * | 2021-09-06 | 2022-01-11 | 珠海格力电器股份有限公司 | Energy storage system control method and device, energy storage system and energy storage equipment |
| WO2023029552A1 (en) * | 2021-09-06 | 2023-03-09 | 珠海格力电器股份有限公司 | Energy storage system control method and apparatus, energy storage system, and energy storage device |
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Application publication date: 20170524 |