CN108173340A - Two-stage type inverter with intelligent power distribution protection - Google Patents
Two-stage type inverter with intelligent power distribution protection Download PDFInfo
- Publication number
- CN108173340A CN108173340A CN201810136317.6A CN201810136317A CN108173340A CN 108173340 A CN108173340 A CN 108173340A CN 201810136317 A CN201810136317 A CN 201810136317A CN 108173340 A CN108173340 A CN 108173340A
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- Prior art keywords
- power distribution
- intelligent power
- converters
- protective device
- control device
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- 230000001681 protective effect Effects 0.000 claims abstract description 30
- 238000004146 energy storage Methods 0.000 claims description 41
- 238000004891 communication Methods 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 8
- 238000010248 power generation Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 210000003850 cellular structure Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- H02J3/383—
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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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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Inverter Devices (AREA)
Abstract
The present invention relates to a kind of two-stage type inverters with intelligent power distribution protection,Including inputting DC/DC converters,Intermediate circuit,Control device,Intelligent power distribution protective device and output DC/AC converters,The input DC/DC converters are connected separately with DC/AC converters by intermediate circuit and control device is attached,The control device is attached with the intelligent power distribution protective device,The intelligent power distribution protective device is also attached with power grid,The information of collection can be fed back to control device by the intelligent power distribution protective device,Control device is used to receive the data sent out after intelligent power distribution protective device arithmetic logic calculates,Intermediate circuit is controlled,The component of inverter is prevented because voltage is more than that optimum setting value causes to damage,Intelligent power distribution protective device is used for realizing that two-stage type inverter is switched over connecting between operational mode and isolated execution mode with power grid.
Description
Technical field
The present invention relates to field of photovoltaic power generation, are specifically related to a kind of two-stage type inverter with intelligent power distribution protection.
Background technology
Many scarcely populated places at home, such as west area, photovoltaic generation, wind-power electricity generation distributed power supply
There is larger growth, some special nomadic people, since population decentralization is strong, as seasonal variety migrates frequently, and to electricity
The demand of power is also little, is modernism the most simple and practical using photovoltaic generation, wind-power electricity generation.At present, west area is built
It is many equipped with the power generation infrastructures quantity such as a large amount of photovoltaics, wind-force, and if a set of generating equipment in general public hand in light
According to being used under conditions of, wind-force abundance, waste is be easy to cause, if the power supplys such as a large amount of distributed photovoltaic power generation, wind-power electricity generations are straight
It connects and is incorporated to power distribution network, will be run to dispatching of power netwoks and bring the problem of a series of new：1. distributed generation resource is in grid collapses
It will immediately exit from running；2. so that distribution network voltage adjustment complicates；3. bring difficulty to relay protection setting.These problems are all
It will influence power supply reliability, safety.The purpose of the present invention is pair two-stage type inverter being connect with power grid is improved, with
Even if causing after electric network fault occurs, remain to provide electric power to user equipment.
Invention content
According to the method for the present invention, it can achieve the object of the present invention.Because the present invention uses intelligent power distribution protective device
Power grid is adjusted, and according to the situation of the power grid, the inverter is controlled to be connect with power grid using control device
Switch between operational mode and isolated execution mode.It is described connect operational mode with power grid under, at least input DC/DC converters
It is opened with output DC/AC converters, to alternating voltage caused by power grid input inverter, to be run in the isolation
Under pattern, input DC/DC converters and/or connectable to spare energy storage device additional energy storage DC/DC converters with
And output DC/AC converters are opened, to provide the alternating voltage of inverter generation to user equipment.
The present invention provides a kind of two-stage type inverter with intelligent power distribution protection, including input DC/DC converters, centre
Circuit, control device, intelligent power distribution protective device and output DC/AC converters, the input DC/DC converters pass through intermediate electricity
Road is connected separately with DC/AC converters and control device is attached, the control device and the intelligent power distribution protective device
It is attached, the intelligent power distribution protective device is also attached with power grid, and the intelligent power distribution protective device can will collect
Information feed back to control device, control device is used to receive the number sent out after intelligent power distribution protective device arithmetic logic calculates
According to controlling intermediate circuit, preventing the component of inverter, intelligent power distribution is protected because voltage is more than that optimum setting value causes to damage
Protection unit is used for realizing that two-stage type inverter is switched over connecting between operational mode and isolated execution mode with power grid.
Preferably, the intelligent power distribution protective device is mounted on device backboard, including communication network card, CPU board, power supply
Module, intake plate, outputs template at analog board.Intelligent power distribution protective device is joined by communication component and control unit
System, carries out intelligent control in the optimum operation voltage range of setting, prevents inverter from damaging.Further, intelligent power distribution is protected
The CPU board of device presets self-healing logical program, can reduce the maintenance more exchange device time significantly.
Preferably, letter is carried out using wired data communication mode between the intelligent power distribution protective device and control device
Breath interaction, may be used general communication interface on data-interface.Wired data communication mode have it is stable and reliable for performance, prevent
The only performance inconsistency under extreme weather conditions, such as the communication interface of RS485 common at present.
Preferably, the power module of the intelligent power distribution protective device uses DC power supplier.Intelligent power distribution is protected
DC power supplier both may be used in device, can also use AC power supply module, but consider the adaptability of two level inverter,
Therefore DC power supplier is preferably used.
Preferably, the DC/DC converters are further included and are connected with energy storage DC/DC in turn with control device connecting line road
Converter and spare energy storage device.Using spare energy storage device, photovoltaic generation can be made utmostly to adapt to
It is backwoodsman to use use all.
The advantages of between the present invention and the prior art, is：1st, the present invention has spare energy storage device, for wet weather
Snow greasy weather gas descends the use of photovoltaic electric energy can be uninterrupted；2nd, the present invention can be incorporated to power distribution network, and photovoltaic generation facility is carried
The extra electric energy supplied can be connected to the grid, and avoid the waste of resource；3rd, have intelligent distribution system, have wired or wireless
Communication mode, can reasonably distribute resource, inverter is protected.
Description of the drawings
In order to illustrate more clearly of the present invention, will simply be situated between to attached drawing needed in embodiment description below
It continues.It should be evident that the accompanying drawings in the following description is only the description to the embodiment of the present invention, for ordinary skill
For personnel, without having to pay creative labor, can also simple deformation or title be carried out according to technical solution
Change or take customary means, can also realize goal of the invention.
Fig. 1 shows a kind of two-stage type inverter schematic diagram with intelligent power distribution protection.
Intelligent power distribution protective device -1, DC/DC converter -2, intermediate circuit -3, DC/AC converter -4, solar cell
Component -5, power grid -6, electrical equipment -7, control device -8, energy storage DC/DC converter -9, spare energy storage device -10 have
Line data line -11, inverter -12
Specific embodiment
With reference to embodiment, the present invention is described in further detail, following embodiment be explanation of the invention and
The invention is not limited in following embodiments.
Embodiment 1
It points out initially that, the same parts in typical illustrative embodiment of the invention use identical digital table
Show.
As shown in Figure 1, it illustrates a kind of structures of the two-stage type inverter 12 with intelligent power distribution protection.Including intelligence
Power distribution protective device 1, DC/DC converters 2, intermediate circuit 3, DC/AC converters 4, electrical equipment 7, control device 8 have line number
According to line 11.Solar cell module 5, power grid 6 and energy storage DC/DC transformation are connected separately with outside the two-stage type inverter 12
Device 9, spare energy storage device 10.The basic structure of the inside of two-stage type inverter 12 passes through intermediate electricity for DC/DC converters 2
Road 3 is attached respectively with control device 8, DC/AC converters 4, is also connected in turn between control device 8 and intermediate circuit 3
Energy storage DC/DC converters 9, spare energy storage device 10, by being circumscribed with spare energy storage device, energy that can be extra
It is laid in, is used in overcast and rainy snow greasy weather gas.
By increasing intelligent power distribution protective device, mainly prevent the power converted in solar battery group excessively high, inversion
The component of device because voltage be more than optimum setting value cause to damage or because conversion underpower, caused by user power utilization set
Standby voltage not enough can not normal use.Intelligent power distribution protective device is used for realizing that two-stage type inverter is connecting operation with power grid
It is switched between pattern and isolated execution mode.
Electric power can be provided to intermediate circuit 3 by inputting DC/DC converters 2 and/or energy storage DC/DC converters 9, wherein
Energy storage DC/DC converters 9 obtain required energy for 10 kinds from energy storage device.Energy storage DC/DC converters 9 in inverter 12
External tool there are one general-purpose interfaces so that energy storage device 10 can be accessed easily.In this way, user can select as needed
Connect to selecting property energy storage device 10.Energy storage device 10 can by accumulator or other similar form.No matter
Described to be connect with power grid in operational mode or in the isolated execution mode, inverter 1 can be detached from energy stores
Device 10 is run.This to the power supply of user equipment 7 under isolated execution mode just to provide possibility, but also connecting with power grid
It connects that energy storage device 10 charge under operational mode or isolated execution mode and is possibly realized.
The inverter 12 of the present invention is connect with power grid under operational mode described in operating mainly in.Here, input DC/DC transformation
The voltage transformation that device 2 transmits the energy source 5 of such as solar battery group is an intermediate circuit voltage that is higher and stablizing,
So that output DC/AC converters 4 can feed a voltage compatible with power grid, and carried simultaneously to user equipment 7 to power grid 6
For the voltage.User equipment 7 is to obtain electric power from power grid 6, and the operational mode of two-stage type inverter 12 is not dependent on energy and deposits
Whether storage device 10 is connected to the energy storage DC/DC converters 9.
And intelligent power distribution protective device 1 can be incorporated into the two-stage type inverter 12.If power grid 6 breaks down, use
The supply of electric power of family equipment 7 also therefore and interrupt, intelligent power distribution protective device 1 will be passed the information on by cable data line 11 to
Control device 8 simultaneously informs the above-mentioned fact, so that the two-stage type inverter 12 is switched to isolated execution mode.Herein, user
Equipment 7 will can also be obtained by energy storage device 10 certainly as obtained electric power being connect in operational mode with power grid
The spare electric power input of profit.Particularly in the wild under the conditions of, in the case where power grid 6 can not be connected, energy storage device 10
Power supply is most important for the use of whole system.
In order to realize stable isolated execution mode, need to meet certain requirement.On the one hand, if the energy 5 is to user
Equipment 7 provides enough electric power, then can ensure a stable isolated execution mode.If it can guarantee that enough electric power supplies
It should, it is not necessary to energy storage DC/DC converters 9 are opened, because of the work as in the case where connecting operational mode with power grid of inverter 1
Make.But if energy source 5 can not provide sufficient electric power for stable isolated execution mode or can not provide electricity
Power, energy storage DC/DC converters 9 would have to provide compensation to provide enough electric energy to user equipment 7.It therefore, at this time can be with
It is anticipated that spare energy storage device 10 is connected to energy storage DC/DC converters 9.
Meanwhile whether the two-stage type inverter 12 in the present embodiment is connected to energy storage device 10 the energy storage DC/
The detection of DC converters 9 is automatically performed, and since energy storage device 10 is connected to energy storage DC/DC converters 9, can at least be swashed
The input voltage living for being loaded into energy storage DC/DC converters 9, so that control device 8 can sense when energy storage device 10
In the presence of.In this case, that is to say, that under isolated execution mode, if other than the energy from energy source 5, also need
Additional energy is wanted, energy storage DC/DC converters 9 just obtain energy from energy storage device 10, cope with energy stores dress certainly
Put it is 10 fully charged as possible, with the failure for the power grid 6 as prolonged as possible that transition occurs.
Energy storage device 10 is mainly charged by energy storage DC/DC converters 9, and energy storage DC/DC converters 9 connect
To the energy storage device 10 being arranged on outside two-stage type inverter 12.It can be to energy stores being connect with power grid in operational mode
Device 10 charges.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
Member, without departing from the inventive concept of the premise, can also make several improvements and modifications, these improvements and modifications also should be regarded as
In protection scope of the present invention.Although the present invention is disclosed as above with embodiment, it is not limited to the protection of the present invention
Range, any technical staff for being familiar with this technology, in the variation and retouching made without departing from the spirit and scope of the invention,
It is within the scope of protection of the invention.
Claims (6)
1. a kind of two-stage type inverter with intelligent power distribution protection, it is characterised in that：Including input DC/DC converters, centre
Circuit, control device, intelligent power distribution protective device and output DC/AC converters, the input DC/DC converters pass through intermediate electricity
Road is connected separately with DC/AC converters and control device is attached, the control device and the intelligent power distribution protective device
It is attached, the intelligent power distribution protective device is also attached with power grid, and the intelligent power distribution protective device can will collect
Information feed back to control device, switched over for realizing being connect between operational mode and isolated execution mode with power grid.
2. a kind of two-stage type inverter with intelligent power distribution protection according to claim 1, it is characterised in that：The intelligence
Can power distribution protective device be mounted on device backboard on, including communication network card, CPU board, power module, analog board, intake plate,
Output template.
3. a kind of two-stage type inverter with intelligent power distribution protection according to claim 1 or 2, it is characterised in that：Institute
It states and information exchange is carried out using wired data communication mode between intelligent power distribution protective device and control device.
4. a kind of two-stage type inverter with intelligent power distribution protection according to claim 1 or 2, it is characterised in that：Institute
The power module for stating intelligent power distribution protective device uses DC power supplier.
5. a kind of two-stage type inverter with intelligent power distribution protection according to claim 1 or 2, it is characterised in that：Also
Energy storage DC/DC converters are connected in turn with control device connecting line road and spare energy is deposited including the DC/DC converters
Storage device.
6. a kind of two-stage type inverter with intelligent power distribution protection according to claim 1 or 2, it is characterised in that：Institute
It states intelligent power distribution protective device and contains control logic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810136317.6A CN108173340A (en) | 2018-02-09 | 2018-02-09 | Two-stage type inverter with intelligent power distribution protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810136317.6A CN108173340A (en) | 2018-02-09 | 2018-02-09 | Two-stage type inverter with intelligent power distribution protection |
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| Publication Number | Publication Date |
|---|---|
| CN108173340A true CN108173340A (en) | 2018-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810136317.6A Pending CN108173340A (en) | 2018-02-09 | 2018-02-09 | Two-stage type inverter with intelligent power distribution protection |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050275386A1 (en) * | 2002-06-23 | 2005-12-15 | Powerlynx A/S | Power converter |
| CN201966628U (en) * | 2007-05-14 | 2011-09-07 | 弗罗纽斯国际有限公司 | Inverter |
| US20150155712A1 (en) * | 2013-09-09 | 2015-06-04 | Inertech Ip Llc | Multi-level medium voltage data center static synchronous compensator (dcstatcom) for active and reactive power control of data centers connected with grid energy storage and smart green distributed energy sources |
| WO2016168999A1 (en) * | 2015-04-22 | 2016-10-27 | 阳光电源股份有限公司 | Miniature photovoltaic inverter and control method therefor |
| CN106849343A (en) * | 2017-01-23 | 2017-06-13 | 武汉理工大学 | The communication base station independently-powered switching system of wind-solar-diesel storage and power switching method |
-
2018
- 2018-02-09 CN CN201810136317.6A patent/CN108173340A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050275386A1 (en) * | 2002-06-23 | 2005-12-15 | Powerlynx A/S | Power converter |
| CN201966628U (en) * | 2007-05-14 | 2011-09-07 | 弗罗纽斯国际有限公司 | Inverter |
| US20150155712A1 (en) * | 2013-09-09 | 2015-06-04 | Inertech Ip Llc | Multi-level medium voltage data center static synchronous compensator (dcstatcom) for active and reactive power control of data centers connected with grid energy storage and smart green distributed energy sources |
| WO2016168999A1 (en) * | 2015-04-22 | 2016-10-27 | 阳光电源股份有限公司 | Miniature photovoltaic inverter and control method therefor |
| CN106849343A (en) * | 2017-01-23 | 2017-06-13 | 武汉理工大学 | The communication base station independently-powered switching system of wind-solar-diesel storage and power switching method |
Non-Patent Citations (3)
| Title |
|---|
| 张喜平;梅柏杉;胥杰;丁佐进;: "大型光伏发电系统的并网控制技术", 上海电力学院学报, no. 06, pages 554 - 558 * |
| 李忠;江冰;赵凤阁;杨君;: "太阳能电池储能系统优化建模研究", 计算机仿真, no. 03, pages 120 - 123 * |
| 郭勇;李勇;皇甫星星;丁勇;石祥建;刘为群;: "两级式光伏发电系统低电压穿越控制策略研究", 电力工程技术, no. 06, pages 7 - 13 * |
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