CN106026074A - Low-voltage DC micro-grid experiment platform - Google Patents
Low-voltage DC micro-grid experiment platform Download PDFInfo
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- CN106026074A CN106026074A CN201610373174.1A CN201610373174A CN106026074A CN 106026074 A CN106026074 A CN 106026074A CN 201610373174 A CN201610373174 A CN 201610373174A CN 106026074 A CN106026074 A CN 106026074A
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- grid
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- load
- current transformer
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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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
- H02J1/102—Parallel operation of dc sources being switching converters
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/14—District level solutions, i.e. local energy networks
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to a low-voltage DC micro-grid experiment platform, which mainly comprises a controller, a single-phase AC/DC converter, a DC micro-grid and a power grid connection switch, wherein the single-phase AC/DC converter, the DC micro-grid and the grid connection switch all are in communication connection with the controller; an input end of the single-phase AC/DC converter is connected to an AC power grid through a power grid; the DC micro-grid comprises an MPPT controller, an energy storage system with a DC/DC converter, a charging pile, an important load, an interruptible load and an elastic load; the MPPT controller is connected with a photovoltaic cell panel; and an output end of the single-phase AC/DC converter is connected with various units of the DC micro-grid in parallel separately. The experiment platform provided by the invention can run in a grid-connected mode, a converter current-limiting mode and an island mode; a seamless switching experiment of various modes can be carried out; researching on storage battery charge and discharge management and power supply side optimization management can be carried out; and the economic demands of the DC micro-grid, the power supply reliability requirements, the electric energy quality and the like can be researched.
Description
Technical field
The present invention relates to micro-capacitance sensor experiment porch field, particularly relate to a kind of low-voltage direct micro-capacitance sensor experiment porch.
Background technology
Micro-capacitance sensor structure specifically includes that exchange micro-capacitance sensor, direct-current grid and mixing micro-capacitance sensor at present.In the past
Research be concentrated mainly on exchange micro-capacitance sensor, being continuously increased however as DC load, direct-current grid phase
Have that energy conversion times is few, efficiency is high for exchange micro-capacitance sensor, low cost, control structure are simple, without
Consider frequency and the advantage such as phase place and reactive-load compensation equipment, promote the fast development of direct-current grid, so
And the research of direct-current grid experiment porch is less, it is difficult to direct-current grid research method is carried out experimental verification.
Summary of the invention
In order to overcome deficiency and the shortage of existing experiment porch, it is provided that a kind of low-voltage direct micro-capacitance sensor experiment porch,
The present invention provides techniques below scheme:
A kind of low-voltage direct micro-capacitance sensor experiment porch, including controller and the list that all communicates to connect with controller
Phase AC/DC current transformer, direct-current grid, electrical network connecting valve；Described single-phase AC/DC current transformer input
Electrical network connecting valve incoming transport electrical network can be passed through；Described direct-current grid includes MPPT controller, band
The energy-storage system of DC/DC current transformer, charging pile, important load, interruptible load, elastic load；Described
MPPT controller connects photovoltaic battery panel；Described single-phase AC/DC current transformer outfan respectively with direct-current grid
Each unit is connected in parallel；The energy-storage system of described band DC/DC current transformer include DC/DC current transformer and and its
The accumulator being connected.
When described direct-current grid is operated in grid-connect mode, direct-current grid is connected by single-phase AC/DC current transformer
AC network, carries out energy exchange.Described direct-current grid can also run on island mode, stable DC
Busbar voltage, powers to DC load.When direct-current grid is grid-connected, electrical network needs the power of output to exceed institute
Stating the rated power of current transformer, the most described low-voltage direct micro-capacitance sensor is operated in current transformer Current limited Control pattern.
And off-network can be carried out on described direct-current grid experiment porch to grid-connected, grid-connected to off-network switching experiment.
Described low-voltage direct micro-capacitance sensor experiment porch can carry out battery management.Controller gathers each accumulator
The information such as capacity, SOC carries out judging accumulator charging, electric discharge, issues instructions to DC/DC current transformer, prevents
Accumulator is crossed to rush or cross and is put, increasing storage battery service life.Described controller can be micro-to described low-voltage direct
Electrical network platform carries out energy management, and controller is according to accumulator SOC, micro-capacitance sensor operational mode and load curve
Determine DC/DC current transformer energy-storage system working method.
Further, described single-phase AC/DC current transformer, direct-current grid each unit and electrical network connecting valve
All it is connected with controller by RS485 bus；Each unit by RS485 bus each self-information such as voltage,
Electric current, output, battery tension, SOC etc. pass to controller, and controller is carried out according to gained information
Optimum management, then transmitted an order to each unit by RS485 bus.
Further, described important load, interruptible load, elastic load are connected with respective switch respectively
After be connected in parallel with single-phase AC/DC current transformer outfan again；Described important load, interruptible load, elasticity
The switch of load is connected with controller by RS485 bus respectively.Controller is according to accumulator SOC, micro-capacitance sensor
Operational mode and load curve determine energy-storage system working method and determine important load, interruptible load,
Switching on and off of elastic load, described controller can verify Demand-side load optimal management function, according to
Charging pile information is optimized management to load.
The beneficial effects of the present invention is:
(1), described low-voltage direct micro-capacitance sensor platform can run on grid-connect mode, current transformer current-limit mode with
And island mode, and the experiment of each pattern seamless switching can be carried out.
(2), described low-voltage direct micro-capacitance sensor platform can carry out accumulator cell charging and discharging management.
(3), described controller can carry out mains side optimum management research, can be with researching DC micro-capacitance sensor warp
Ji demand, power supply reliability demand, the quality of power supply etc..
(4), in technical solution of the present invention, described controller can carry out Demand-side according to charging pile information and bear
Lotus optimum management is tested.
Accompanying drawing explanation
Fig. 1 is experiment porch block diagram of the present invention.
In figure: 1, AC network, 2, electrical network connecting valve, 3, direct-current grid, 4, photovoltaic battery panel, 5,
RS485 bus.
Detailed description of the invention
See Fig. 1, including controller and all with controller communication connection single-phase AC/DC current transformer, direct current
Micro-capacitance sensor 3, electrical network connecting valve 2；Described single-phase AC/DC current transformer input can be connected by electrical network to be opened
Close 2 incoming transport electrical networks 1；Described direct-current grid 3 includes MPPT controller, multiple band DC/DC unsteady flow
The energy-storage system of device, charging pile, important load, interruptible load, elastic load；Described MPPT controller
Connect photovoltaic battery panel 4；Described single-phase AC/DC current transformer outfan is respectively with direct-current grid 3 each unit also
Connection connects；The energy-storage system of described band DC/DC current transformer includes DC/DC current transformer and coupled storage
Battery, DSP28335 selected by the controller of the present embodiment.
Described important load, interruptible load, elastic load respectively with respective switch connect after again with single-phase
AC/DC current transformer outfan is connected in parallel；Described 3 switches are respectively by RS485 bus 5 with controller even
Connect.
In described low-voltage direct micro-capacitance sensor 3 experiment porch, by described single-phase AC/DC current transformer, direct current is micro-
Electrical network 3 is connected to AC network 1, when being operated in grid-connect mode, when described direct-current grid 3 generates electricity more,
Described single-phase AC/DC current transformer is operated in inverter mode；When described direct-current grid 3 underpower, institute
State single-phase AC/DC current transformer and be operated in rectification mode.Described low-voltage direct micro-capacitance sensor 3 experiment porch is operated in
During island mode, energy-storage system maintains DC bus-bar voltage, maintains system stability and the quality of power supply.Pass through
Described single-phase AC/DC current transformer carries out the grid-connected seamless switching of off-network.
When described low-voltage direct micro-capacitance sensor 3 experiment porch works in current transformer current-limit mode, by described single-phase
AC/DC current transformer is connected to AC network 1 direct-current grid 3, when described direct-current grid 3 generates electricity relatively
Time many, described single-phase AC/DC current transformer is operated in inverter mode, opens elastic load simultaneously and absorbs many complementary energy
Amount；When described direct-current grid 3 underpower, described single-phase AC/DC current transformer is operated in rectification mode,
Excise interruptible load simultaneously.
When described low-voltage direct micro-capacitance sensor 3 experiment porch works in island mode, controller is according to photovoltaic generation
Unit and accumulator SOC etc. carry out energy management.Interruptible load, system is excised during system power deficiency
Open elastic load during power surplus and absorb excess energy.
In described low-voltage direct micro-capacitance sensor 3 experiment porch, energy-storage system uses accumulator, by two-way DC/DC
Changer is connected with dc bus.Described controller stores according to the capacity of each battery, terminal voltage, SOC
Battery management, extends battery.Energy-storage system maintains DC bus-bar voltage, it is ensured that low-voltage direct is micro-
The quality of power supply of electrical network 3 experiment porch.
In described low-voltage direct micro-capacitance sensor 3 experiment porch, controller can carry out orderly charging valve to charging pile
Reason, verifies Demand-side load optimal management method.
Following research can be launched by low-voltage direct micro-capacitance sensor experiment porch of the present invention:
1, mixed energy storage system controls technical research and control strategy checking；
2, direct-current grid monitoring, communication experimentation；
3, direct-current grid energy management research and confirmation；
4, the research of direct-current grid droop control and experimental verification；
5, the grid-connected strategy study of direct-current grid and checking；
6, battery management system research and checking.
With above-mentioned foundation desirable embodiment of the present invention for enlightenment, by above-mentioned description, related work people
Member can carry out various change and amendment completely in the range of without departing from this invention technological thought.
The content that the technical scope of this invention is not limited in description, it is necessary to according to right
Determine its technical scope.
Claims (3)
1. a low-voltage direct micro-capacitance sensor experiment porch, it is characterised in that: include controller and all with control
The single-phase AC/DC current transformer of device communication connection, direct-current grid, electrical network connecting valve；Described list
Phase AC/DC current transformer input can pass through electrical network connecting valve incoming transport electrical network；Described direct current
Micro-capacitance sensor includes MPPT controller, the energy-storage system of band DC/DC current transformer, charging pile, important
Load, interruptible load, elastic load；Described MPPT controller connects photovoltaic battery panel；Institute
State single-phase AC/DC current transformer outfan to be connected in parallel with direct-current grid each unit respectively；Described band
The energy-storage system of DC/DC current transformer includes DC/DC current transformer and coupled accumulator.
2. a kind of low-voltage direct micro-capacitance sensor experiment porch as claimed in claim 1, it is characterised in that: described
Single-phase AC/DC current transformer, direct-current grid each unit and electrical network connecting valve all pass through RS485
Bus is connected with controller.
3. a kind of low-voltage direct micro-capacitance sensor experiment porch as claimed in claim 1, it is characterised in that: described
Important load, interruptible load, elastic load respectively with respective switch connect after again with single-phase
AC/DC current transformer outfan is connected in parallel；Described important load, interruptible load, elastic load
Switch be connected with controller by RS485 bus respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610373174.1A CN106026074A (en) | 2016-05-25 | 2016-05-25 | Low-voltage DC micro-grid experiment platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610373174.1A CN106026074A (en) | 2016-05-25 | 2016-05-25 | Low-voltage DC micro-grid experiment platform |
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| CN106026074A true CN106026074A (en) | 2016-10-12 |
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| CN201610373174.1A Pending CN106026074A (en) | 2016-05-25 | 2016-05-25 | Low-voltage DC micro-grid experiment platform |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111179709A (en) * | 2020-03-13 | 2020-05-19 | 安徽工业大学 | Digital multifunctional power electronic technology teaching experiment platform |
| CN111243406A (en) * | 2020-03-13 | 2020-06-05 | 安徽工业大学 | Digital multifunctional power electronic technology experiment method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5467642B2 (en) * | 2010-04-05 | 2014-04-09 | 實 村野 | DC microgrid network |
| CN104835080A (en) * | 2015-04-30 | 2015-08-12 | 华南理工大学 | Modeling method for micro-grid intraday scheduling plan mixed integer programming model |
| CN105245126A (en) * | 2015-10-22 | 2016-01-13 | 江苏绿扬电子仪器集团有限公司 | Teaching inverter system module |
| CN205846720U (en) * | 2016-05-25 | 2016-12-28 | 安徽大学 | A kind of low-voltage direct micro-capacitance sensor experiment porch |
-
2016
- 2016-05-25 CN CN201610373174.1A patent/CN106026074A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5467642B2 (en) * | 2010-04-05 | 2014-04-09 | 實 村野 | DC microgrid network |
| CN104835080A (en) * | 2015-04-30 | 2015-08-12 | 华南理工大学 | Modeling method for micro-grid intraday scheduling plan mixed integer programming model |
| CN105245126A (en) * | 2015-10-22 | 2016-01-13 | 江苏绿扬电子仪器集团有限公司 | Teaching inverter system module |
| CN205846720U (en) * | 2016-05-25 | 2016-12-28 | 安徽大学 | A kind of low-voltage direct micro-capacitance sensor experiment porch |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111179709A (en) * | 2020-03-13 | 2020-05-19 | 安徽工业大学 | Digital multifunctional power electronic technology teaching experiment platform |
| CN111243406A (en) * | 2020-03-13 | 2020-06-05 | 安徽工业大学 | Digital multifunctional power electronic technology experiment method |
| CN111243406B (en) * | 2020-03-13 | 2022-03-08 | 安徽工业大学 | Digital multifunctional power electronic technology experiment method |
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| PB01 | Publication | ||
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| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20161227 Address after: 230022 Jinzhai Road, Shushan District, Anhui, No. 73, No. Applicant after: Anhui Xinli Electric Utility Technology Consulting Co., Ltd. Applicant after: Anhui University Address before: 230039 Hefei West Road, Anhui, No. 3 Applicant before: Anhui University |
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| CB03 | Change of inventor or designer information |
Inventor after: Zhao Long Inventor after: Huang Debao Inventor after: Li Delin Inventor after: Yang Xian Inventor before: Hu Cungang Inventor before: Cheng Ying Inventor before: Zhao Long Inventor before: Luo Yaqiao Inventor before: Rui Tao Inventor before: Zhang Yunlei |
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| CB03 | Change of inventor or designer information | ||
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Application publication date: 20161012 |
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| RJ01 | Rejection of invention patent application after publication |