CN110401226A - Converter device and photovoltaic generating system - Google Patents
Converter device and photovoltaic generating system Download PDFInfo
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- CN110401226A CN110401226A CN201910792391.8A CN201910792391A CN110401226A CN 110401226 A CN110401226 A CN 110401226A CN 201910792391 A CN201910792391 A CN 201910792391A CN 110401226 A CN110401226 A CN 110401226A
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- 238000010248 power generation Methods 0.000 claims abstract description 76
- 238000006243 chemical reaction Methods 0.000 claims abstract description 18
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- 230000005611 electricity Effects 0.000 description 4
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
- H02S40/32—Electrical components comprising DC/AC inverter means associated with the PV module itself, e.g. AC modules
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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
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Abstract
This application involves a kind of converter device and photovoltaic generating systems, the device includes DC transformer, AC convertor, photovoltaic side terminal, bus side terminal and load wiring terminal, photovoltaic side terminal connects DC transformer, DC transformer connects AC convertor, bus side terminal connects AC convertor, AC convertor connects load side terminal, photovoltaic side terminal or bus side terminal for connecting photovoltaic power generation equipment, and load side terminal is for connecting load.Photovoltaic power generation equipment can be connect by bus side terminal with AC convertor, electric current after conversion is delivered to load by load side terminal by AC convertor, photovoltaic power generation equipment can also connect DC transformer by photovoltaic side terminal, by being delivered to load after the collective effect of DC transformer and AC convertor, the converter device includes multiple interfaces, improves the compatibility of converter device, reduces the use cost of converter device, easy to use, use reliability is high.
Description
Technical field
This application involves power electronics fields, more particularly to a kind of converter device and photovoltaic generating system.
Background technique
With the rapid development of power electronic technique, various electrical equipments emerge one after another, and the electricity consumption of different electrical equipments needs
Ask different, therefore current transformer is widely used, current transformer application in circuit, make the voltage of power-supply system, frequency,
The number of phases and other electricity or characteristic change, can be just using electric equipment then by the electrical energy transportation after variation to electrical equipment
Often work.
Traditional converter device includes DC/AC single stage type converter device and DC/DC+DC/AC stage type structure unsteady flow
Device device, according to the difference of application scenarios, selects different converter devices to come into operation in photovoltaic generating system, however,
Two kinds of current transformers need individually exploitation and maintenance, increase the production cost of current transformer and use cost, and victory inconvenient for use uses
Reliability is low.
Summary of the invention
Based on this, it is necessary to for the low problem of traditional converter device use reliability, provide a kind of current transformer dress
It sets and photovoltaic generating system.
A kind of converter device, including DC transformer, AC convertor, photovoltaic side terminal, bus side terminal and load
Connecting terminal, the photovoltaic side terminal connect the DC transformer, and the DC transformer connects the AC convertor, institute
It states bus side terminal and connects the AC convertor, the AC convertor connects the load side terminal, the photovoltaic side
The sub or described bus side terminal is for connecting photovoltaic power generation equipment, and the load side terminal is for connecting load.
A kind of photovoltaic generating system, including photovoltaic power generation equipment and such as above-mentioned converter device, the photovoltaic power generation is set
It is standby to connect the converter device.
Above-mentioned converter device and photovoltaic generating system, when bus side terminal connects photovoltaic power generation equipment, photovoltaic power generation is set
When for being connect by bus side terminal with AC convertor, the electric current after conversion is passed through load side terminal and conveyed by AC convertor
To load；When photovoltaic side terminal connects photovoltaic power generation equipment, photovoltaic power generation equipment connects DC transformer by photovoltaic side terminal
When, DC transformer connects AC convertor, by being delivered to load after the collective effect of DC transformer and AC convertor.
The converter device includes multiple interfaces, is applicable to connection photovoltaic side terminal and connects the photovoltaic power generation equipment of bus side terminal
Two kinds of application scenarios, improve the compatibility of converter device, reduce the use cost of converter device, it is easy to use,
Use reliability is high.
Detailed description of the invention
Fig. 1 is the structural block diagram of converter device in one embodiment；
Fig. 2 is the application scenarios structure chart of converter device in one embodiment；
Fig. 3 is the application scenarios structure chart of converter device in another embodiment；
Fig. 4 is the structural block diagram of photovoltaic generating system in one embodiment；
Fig. 5 is the structural block diagram of photovoltaic generating system in another embodiment.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, by the following examples, it and combines attached
Figure, is described more fully the present invention.It should be appreciated that specific embodiment described herein is only to explain this hair
It is bright, it is not intended to limit the present invention.
In one embodiment, referring to Figure 1, a kind of converter device is provided, the device include DC transformer 110,
AC convertor 120, photovoltaic side terminal PV, bus side terminal BUS and load side terminal OUT, photovoltaic side terminal PV connection direct current
Current transformer 110, DC transformer 110 connect AC convertor 120, bus side terminal BUS connection AC convertor 120, exchange
Current transformer 120 connects load side terminal, photovoltaic side terminal PV or bus side terminal BUS for connecting photovoltaic power generation equipment, loads
Side terminal OUT is for connecting load.When bus side terminal BUS connection photovoltaic power generation equipment, photovoltaic power generation equipment passes through bus bar side
When terminal BUS is connect with AC convertor 120, AC convertor 120 conveys the electric current after conversion by load side terminal OUT
To load, when photovoltaic side terminal PV connection photovoltaic power generation equipment, photovoltaic power generation equipment is become by photovoltaic side terminal PV connection direct current
When flowing device 110, DC transformer 110 connects AC convertor 120, by being total to for DC transformer 110 and AC convertor 120
Load is delivered to after same-action, which includes multiple interfaces, is applicable to connection photovoltaic side terminal PV and connection is female
Two kinds of application scenarios of the photovoltaic power generation equipment of line side terminal BUS, improve the compatibility of converter device, reduce current transformer
The use cost of device, easy to use, use reliability is high.
Specifically, in the present embodiment, DC transformer 110 refers to DC/DC current transformer, and the function of realization is that direct current turns straight
Stream, AC convertor 120 refer to DC/AC current transformer, and the function of realization is that direct current delivers stream.Photovoltaic power generation equipment can be by the sun
It can be converted into after electric energy and be used for the equipment of needs, there are two types of application scenarios for photovoltaic power generation equipment, the first application scenarios is light
Lying prostrate generating equipment includes photovoltaic module and power optimization equipment, refers to Fig. 2, monolithic photovoltaic module is all set with power optimization
It is standby, it is connected according to power optimization equipment output voltage size, reaches high direct voltage, for the function of monolithic photovoltaic module exploitation
Rate optimizes equipment, and photovoltaic module output voltage is boosted, and realizes the maximal power tracing of photovoltaic module output, can be maximum
Change the generated energy for utilizing photovoltaic module, when monolithic photovoltaic module occurs abnormal, power optimization equipment can be bypassed, not shadow
Ring the normal work of other photovoltaic modulies.Under such application scenarios, after the power optimization equipment series connection in photovoltaic power generation equipment
Bus side terminal BUS is connected, by bus side terminal BUS connection DC/AC current transformer, the direct current that photovoltaic power generation equipment is generated
After being converted into alternating current, it is delivered at load by load side terminal and is used for load, photovoltaic power generation equipment can be made full use of
Generated energy improves energy conversion efficiency, improves converter device working efficiency.
Second of application scenarios is to refer to Fig. 3, and photovoltaic power generation equipment includes photovoltaic module, photovoltaic module output end string
Connection, establishes high direct voltage, under such application scenarios, connects photovoltaic side terminal after the photovoltaic module series connection in photovoltaic power generation equipment
PV, by photovoltaic side terminal PV connection DC/DC current transformer, DC/DC current transformer connects DC/AC current transformer, and photovoltaic power generation equipment produces
Raw direct current is defeated by load side terminal then after DC/AC current transformer is converted into alternating current after the conversion of DC/DC current transformer
It send at load and is used for load, in this case, it is wider that converter device accesses photovoltaic module voltage range, and is able to achieve
DC bus-bar voltage is stablized.
Photovoltaic power generation equipment after the effect of converter device, can by the electric energy of generation after converter device converts,
It is used by the load side terminal of converter device for load, for example, power grid can be connected by load side terminal, is conveyed to power grid
Energy realizes the grid-connected of converter device.Terminal in the present embodiment includes photovoltaic side terminal PV, bus side terminal BUS and bears
Side terminal OUT is carried, the structure of these terminals is not that uniquely, by taking photovoltaic side terminal PV as an example, photovoltaic side terminal PV connection is straight
Current transformer 110 is flowed, photovoltaic side terminal PV can be the plug/unplug interface formed on DC transformer 110, these interfaces are by leading
Line connects the other structures of DC transformer 110, in use, photovoltaic power generation equipment is connected to direct current change by conducting wire or interface etc.
Flow the photovoltaic side interface on device 110, it is easy to use, alternatively, DC transformer 110 can be used to access the device of electric energy as
Photovoltaic side interface, such as will be used to access the conducting wire of electric energy in DC transformer 110 as photovoltaic side interface, by conducting wire when use
It is connected on photovoltaic power generation equipment, it is possible to reduce hardware configuration reduces use cost.It is appreciated that bus side terminal BUS
Similar with the structure of above explained photovoltaic side terminal PV with the structure of load side terminal, details are not described herein.
In one embodiment, photovoltaic side terminal PV is detachably connected with DC transformer 110, DC transformer 110 with
AC convertor 120 is detachably connected.Being detachably connected disassemble DC transformer 110 can from converter device, fit
It is wider with range.
Specifically, be detachably connected based on photovoltaic side terminal PV and DC transformer 110, DC transformer 110 with exchange
The connection relationship that current transformer 120 is detachably connected, thus it is possible to vary the device to come into operation in converter device, when photovoltaic side terminal
When PV is disconnected with DC transformer 110 or DC transformer 110 is disconnected with AC convertor 120, DC conversion
Device 110 does not come into operation with photovoltaic side terminal PV, when photovoltaic power generation equipment passes through bus side terminal BUS connection converter device,
By in converter device AC convertor 120 act on after by DC conversion be alternating current after for load use.When photovoltaic side
Terminals P V is disconnected with DC transformer 110, and when DC transformer 110 and AC convertor 120 disconnect, direct current becomes
Stream device 110 and photovoltaic side terminal PV does not come into operation, and can disassemble DC transformer 110 from converter device, thus
The weight for mitigating converter device, keeps converter device use more convenient, realizes the single stage type inversion topological function of converter device
Can, improve the utilization rate of photovoltaic power generation quantity.
When photovoltaic side terminal PV connect with DC transformer 110 intact, and DC transformer 110 and AC convertor 120
When connecting intact, photovoltaic power generation equipment can connect photovoltaic side terminal PV, pass through photovoltaic side terminal PV connection DC/DC current transformer, DC/
DC current transformer connects DC/AC current transformer, and the direct current that photovoltaic power generation equipment generates is after the conversion of DC/DC current transformer, then through DC/AC
After current transformer is converted into alternating current, it is delivered at load by load side terminal and is used for load, in this case, current transformer
DC/DC current transformer is installed, converter device is realized the stage type topological functions of Modularized current transformer, can both be widened in device
The voltage range of photovoltaic power generation equipment input, and can realize that DC bus-bar voltage stablizes output, dock DC load.
Realize the device that is detachably connected be not it is unique, it is detachable with DC transformer 110 and AC convertor 120
For connection, realize that the device being detachably connected can be plug-in and pull-off device, 110 surface of DC transformer is formed with conductive protrusion
Structure, 120 surface of AC convertor are formed with sunk structure, and sunk structure is from surface toward 120 centre of AC convertor
Direction extends, and the size matching of bulge-structure and sunk structure can realize DC conversion when bulge-structure is inserted into sunk structure
The conductive connection of device 110 and AC convertor 120, when the connection for needing to disconnect DC transformer 110 Yu AC convertor 120
When, DC transformer 110 is extracted, it is easy to use, it will be understood that in other embodiments, can also be using other knots
The device of structure realizes that DC transformer 110 is detachably connected with AC convertor 120, such as buckle structure etc., as long as this field
Technical staff thinks may be implemented.Realize that structure that photovoltaic side terminal PV and DC transformer 110 are detachably connected can be with
Similar with the structure that AC convertor 120 is detachably connected with above-mentioned realization DC transformer 110, details are not described herein.
In one embodiment, photovoltaic side terminal PV is two or more.When the quantity of photovoltaic side terminal PV is two or more
When, by the multiple photovoltaic power generation equipments of multiple photovoltaic side terminal PV connections, improve the working efficiency of Modularized current transformer.
Specifically, photovoltaic side terminal PV refers to realizing the terminal effectively connecting with a photovoltaic power generation equipment, and one has
The particular number for the terminal for including in effect terminal can be one or more, determine according to the actual situation.In the present embodiment
In, the quantity of photovoltaic side terminal PV refer to from the quantity of effective terminal of the connection of different photovoltaic power generation equipments, for example, working as light
When the quantity for lying prostrate side is two, converter device can be set by two photovoltaic side terminal PV two different photovoltaic power generations of connection
It is standby.Photovoltaic apparatus includes concatenated photovoltaic module, when the quantity of photovoltaic side terminal PV is more than two, if after one group of series connection
It, can be other by photovoltaic side ports connections other in converter device when the voltage of photovoltaic module output is unable to meet demand
Photovoltaic power generation equipment, to increase the input voltage of converter device, scalability is good, can also be by the way that different photovoltaic side ports are arranged
The different operating timing of the photovoltaic power generation equipment of connection realizes the processing in order to the photovoltaic power generation equipment conveying electric energy of access,
Improve the working efficiency of converter device.In addition, when the quantity of photovoltaic side terminal PV is more than two, if one of photovoltaic
Side terminal PV breaks down, other photovoltaic side terminal PV substitution also can be used, ensure the normal operation of converter device, improve and become
Flow the use reliability of device device.
In one embodiment, refer to Fig. 2 or Fig. 3, photovoltaic side terminal PV include photovoltaic positive terminal PV1+ and
Photovoltaic negative terminal PV1-, photovoltaic positive terminal PV1+ and photovoltaic negative terminal PV1- are all connected with DC conversion
Device 110, bus side terminal BUS include bus positive terminal Bus+ and bus negative terminal Bus-, and bus anode connects
Line terminals Bus+ and bus negative terminal Bus- is all connected with AC convertor 120, and load side terminal OUT includes load anode
Connecting terminal L and load negative terminal N, load positive terminal L are all connected with load negative terminal N and exchange change
Flow device 120.Specifically, converter device passes through photovoltaic positive terminal PV1+ and photovoltaic negative terminal PV1- and photovoltaic
Generating equipment realizes electric energy transmission, or passes through bus positive terminal Bus+ and bus negative terminal Bus- and photovoltaic
Generating equipment realizes electric energy transmission, and converter device also passes through load positive terminal L and load negative terminal N and will turn
Electric energy after change is transmitted to load, works normally for load.When load is power grid, positive terminal L connection power grid is loaded
Firewire, load negative terminal N connection power grid line, the electric energy after converter device is converted is transmitted in power grid.
It is appreciated that in other embodiments, the specific structure of photovoltaic side terminal PV, bus side terminal BUS and load side terminal OUT and
Including the quantity of terminal may be other situations, as long as those skilled in the art think may be implemented.
In one embodiment, converter device further includes protective shell, and DC transformer 110 and AC convertor 120 are equal
It is set in protective shell, photovoltaic side terminal PV, bus side terminal BUS and load wiring terminal OUT are set to protective shell.Protective shell
On be provided with wire binding post as corresponding terminal, the wire binding post being arranged on protective shell is as corresponding terminal, for connecting
Photovoltaic power generation equipment and load, protective shell can play the role of protecting other devices of converter device, to extend current transformer dress
The service life set.
Specifically, the size of protective shell is not unique, in general, as long as the size of protective shell is able to satisfy direct current
The size that the other component of 110 device of current transformer wraps up will not occupy additional while playing a protective role
Space, it is easy to use.The material of protective shell is also not uniquely, such as the metal coating shell coated with insulating layer can be used,
It is the impact resistance of metal coating shell, anticorrosive, the service life of other devices of the converter device of protection, metal coating shell can be extended
Including insulating layer, it can prevent from leaking electricity, improve the safety of converter device.The specific structure of protective shell is also not uniquely, example
If protective shell includes pedestal and protective cover, other devices of converter device are set on pedestal, and protective cover is by converter device
Other devices wrap up, then connect with pedestal, pedestal can make converter device be fixed at the occasions of needs, improve
The stability of converter device work, protective cover can play the role of protecting other devices in converter device, so that extending makes
Use the service life.It is appreciated that in other embodiments, protective shell may be other structures, as long as those skilled in the art think
It may be implemented.
Above-described embodiment in order to better understand carries out detailed explanation below in conjunction with a specific embodiment,
In one embodiment, converter device includes DC/DC current transformer and DC/AC current transformer, DC/DC current transformer and DC/AC unsteady flow
The equal modularized design of device, wherein DC/DC converter module is removable, converter device connecting terminal have photovoltaic side PV1+/PV1-,
DC bus side Bus+/Bus-, grid side L/N.
When every piece of photovoltaic module is connected to power optimization equipment, Fig. 2 is referred to, is based on power optimization equipment output voltage
Size and Modularized current transformer bus Bus+, Bus- voltage swing determine serial number.Determine serial number method particularly includes:
It is 400V with DC bus-bar voltage, for single power optimization equipment maximum output voltage 58V, photovoltaic module open-circuit voltage 38V,
It can then determine that photovoltaic module access is about 10 pieces (400/38), at least access 7 pieces of quantity (400/58), it can be according to visitor
Family side installation site determines specific installation number.The DC bus Bus that high direct voltage is linked into converter device is established after series connection
+, Bus- connecting terminal, be connected to the grid after modular DC/AC, or give AC and DC load supplying, such situation current transformer
DC/DC converter module disassembles in device, realizes the single stage type inversion topological function of converter device, improves photovoltaic power generation quantity
Utilization rate.
When not installing power optimization equipment in photovoltaic generating system, Fig. 3 is referred to, direct current is established in photovoltaic module series connection
High pressure is linked at photovoltaic side PV1+, PV1- connecting terminal of converter device, through modularization DC/DC and modular DC/AC
After be connected to the grid, or give AC and DC load supplying, DC/DC is installed in converter device at this time, realizes converter device
Stage type topological functions, wherein photovoltaic side terminal is extended to the input of multichannel photovoltaic, can both widen photovoltaic module input
Voltage range, and can realize DC bus-bar voltage stablize output, dock DC load.The external terminal of the converter device
The compatible two kinds of photovoltaic power generation application scenarios of son, the compatibility of converter device can be improved based on such design method, reduce simultaneously
The cost input of current transformer manufacturer.
Above-mentioned converter device, when bus side terminal BUS connection photovoltaic power generation equipment, photovoltaic power generation equipment passes through bus bar side
When terminal BUS is connect with AC convertor 120, the electric current after conversion is delivered to by AC convertor 120 by load side terminal
Load, when photovoltaic side terminal PV connection photovoltaic power generation equipment, photovoltaic power generation equipment passes through photovoltaic side terminal PV connection DC conversion
When device 110, DC transformer 110 connects AC convertor 120, by the common of DC transformer 110 and AC convertor 120
Load is delivered to after effect, which includes multiple interfaces, is applicable to connection photovoltaic side terminal PV and connects bus
Two kinds of application scenarios of the photovoltaic power generation equipment of side terminal BUS, improve the compatibility of converter device, reduce current transformer dress
The use cost set, easy to use, use reliability is high.
In one embodiment, Fig. 4 is referred to, a kind of photovoltaic generating system is provided, including photovoltaic power generation equipment 200 and such as
Above-mentioned converter device 100, photovoltaic power generation equipment 200 connect converter device 100.
Specifically, it is used after photovoltaic power generation equipment 200 can convert solar energy into electrical energy for the equipment of needs, photovoltaic hair
Electric equipment 200 can be connect by the photovoltaic side ports or bus side ports of converter device 100 with converter device 100, light
The conversion that the electric energy that generating equipment 200 generates passes through converter device 100 is lied prostrate, is delivered at load by load-side port for negative
It carries and uses.The structure of photovoltaic power generation equipment 200 is not that uniquely, in one embodiment, photovoltaic power generation equipment 200 includes light
Component 210 is lied prostrate, high direct voltage is established in the series connection of 210 output end of photovoltaic module, under such application scenarios, photovoltaic power generation equipment 200
In photovoltaic module 210 connect after connect photovoltaic side terminal PV, pass through photovoltaic side terminal PV connection DC/DC current transformer, DC/DC change
It flows device and connects DC/AC current transformer, the direct current that photovoltaic power generation equipment 200 generates is after the conversion of DC/DC current transformer, then through DC/AC
After current transformer is converted into alternating current, it is delivered at load by load side terminal and is used for load, in this case, current transformer
It is wider that device 100 accesses 210 voltage range of photovoltaic module, and is able to achieve DC bus-bar voltage and stablizes.
In one embodiment, Fig. 5 is referred to, photovoltaic power generation equipment 200 includes photovoltaic module 210 and power optimization equipment
220, photovoltaic module 210 connects converter device 100 by power optimization equipment 220.
Specifically, photovoltaic power generation equipment 200 includes photovoltaic module 210 and power optimization equipment 220, monolithic photovoltaic module
210 all have power optimization equipment 220, are connected according to 220 output voltage size of power optimization equipment, reach direct current height
Pressure boosts 210 output voltage of photovoltaic module for the power optimization equipment 220 that monolithic photovoltaic module 210 is developed, and
It realizes the maximal power tracing that photovoltaic module 210 exports, the generated energy of photovoltaic module 210 can be maximally utilized, when monolithic photovoltaic
When component 210 occurs abnormal, power optimization equipment 220 can be bypassed, and have no effect on the normal work of other photovoltaic modulies 210
Make.Under such application scenarios, the power optimization equipment 220 in photovoltaic power generation equipment 200 connects bus side terminal after connecting
BUS, by bus side terminal BUS connection DC/AC current transformer, the DC conversion that photovoltaic power generation equipment 200 is generated is exchange
After electricity, it is delivered at load by load side terminal and is used for load, the generated energy of photovoltaic power generation equipment 200 can be made full use of,
Energy conversion efficiency is improved, 100 working efficiency of converter device is improved.
In one embodiment, the quantity of photovoltaic module 210 is equal with the quantity of power optimization equipment 220.Each light
Volt component 210 is all connected with a power optimization equipment 220, connects converter device after the series connection of these power optimization equipment 220
100, for the power optimization equipment 220 that monolithic photovoltaic module 210 is developed, 210 output voltage of photovoltaic module is boosted, and
It realizes the maximal power tracing that photovoltaic module 210 exports, the generated energy of photovoltaic module 210 can be maximally utilized, when monolithic photovoltaic
When component 210 occurs abnormal, power optimization equipment 220 can be bypassed, and have no effect on the normal work of other photovoltaic modulies 210
Make, to improve the functional reliability of photovoltaic generating system.
In one embodiment, Fig. 5 is referred to, photovoltaic generating system further includes converting switch device 300, switching switch dress
300 connection photovoltaic power generation equipments 200 are set, and connect photovoltaic side terminal PV and bus side terminal BUS.Converting switch device 300 is used
In change with the conducting route of photovoltaic power generation equipment 200, specifically, can be changed photovoltaic side terminal PV or bus side terminal BUS with
Photovoltaic power generation equipment 200 is connected, so that current transformer different in converter device 100 is made to come into operation, it is easy to use.
Specifically, the structure of converting switch device 300 is not unique, such as can be multi-gear switch, multi-gear switch
Stationary contact connect photovoltaic power generation equipment 200, the movable contact of multi-gear switch is separately connected photovoltaic side terminal PV and bus side terminal
BUS is connected from different movable contacts by changing stationary contact, can switch the terminal be connected with photovoltaic power generation equipment 200, used
It is convenient.
In one embodiment, photovoltaic generating system further includes controller 400, and controller 400 connects converting switch device
300。
Specifically, controller 400 can control the working condition of converting switch device 300, can specifically be controlled by sending
Signal controls the working condition of converting switch device 300, for example, relay moves when converting switch device 300 is relay
Contact is separately connected photovoltaic side terminal PV and bus side terminal BUS, controller 400 can send high level or low level control after
Whether electric apparatus coil is powered, and according to the different conditions of relay coil, the movable contact of stationary contact terminal different from connection is connected, with
Change the conducting route with photovoltaic power generation equipment 200.According to the various combination of the energized state control switch of coil, switching side
Just, the automatic control of conducting route may be implemented.
Above-mentioned photovoltaic generating system, when bus side terminal BUS connection photovoltaic power generation equipment 200, photovoltaic power generation equipment 200 is logical
When crossing bus side terminal BUS and connecting with AC convertor 120, the electric current after conversion is passed through load side end by AC convertor 120
Son is delivered to load, and when photovoltaic side terminal PV connection photovoltaic power generation equipment 200, photovoltaic power generation equipment 200 passes through photovoltaic side terminal
When PV connection DC transformer 110, DC transformer 110 connect AC convertor 120, by DC transformer 110 with exchange
Load is delivered to after the collective effect of current transformer 120, which includes multiple interfaces, is applicable to connection photovoltaic
Two kinds of application scenarios of the photovoltaic power generation equipment 200 of side terminal PV and connection bus side terminal BUS, improve converter device
100 compatibility reduces the use cost of converter device 100, easy to use, and use reliability is high.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of converter device, which is characterized in that including DC transformer, AC convertor, photovoltaic side terminal, bus side
Son and load wiring terminal, the photovoltaic side terminal connect the DC transformer, and the DC transformer connects the exchange
Current transformer, the bus side terminal connect the AC convertor, and the AC convertor connects the load side terminal, described
Photovoltaic side terminal or the bus side terminal are for connecting photovoltaic power generation equipment, and the load side terminal is for connecting load.
2. the apparatus according to claim 1, which is characterized in that the photovoltaic side terminal and the DC transformer are detachable
Connection, the DC transformer are detachably connected with the AC convertor.
3. the apparatus according to claim 1, which is characterized in that the photovoltaic side terminal is two or more.
4. the apparatus according to claim 1, which is characterized in that the photovoltaic side terminal include photovoltaic positive terminal and
Photovoltaic negative terminal, the photovoltaic positive terminal and the photovoltaic negative terminal are all connected with the DC conversion
Device；The bus side terminal includes bus positive terminal and bus negative terminal, the bus positive terminal
It is all connected with the AC convertor with the bus negative terminal, the load side terminal includes load positive terminal
With load negative terminal, the load positive terminal and the load negative terminal, which are all connected with, described exchanges change
Flow device.
5. the apparatus according to claim 1, which is characterized in that it further include protective shell, the DC transformer and the friendship
Stream current transformer is all set in the protective shell, the photovoltaic side terminal, the bus side terminal and the load wiring terminal
It is set to the protective shell.
6. a kind of photovoltaic generating system, which is characterized in that including photovoltaic power generation equipment and such as any one of claim 1-5 institute
The converter device stated, the photovoltaic power generation equipment connect the converter device.
7. system according to claim 6, which is characterized in that the photovoltaic power generation equipment includes that photovoltaic module and power are excellent
Change equipment, the photovoltaic module connects the converter device by the power optimization equipment.
8. system according to claim 7, which is characterized in that the quantity of the photovoltaic module and the power optimization equipment
Quantity it is equal.
9. system according to claim 6, which is characterized in that it further include converting switch device, the converting switch device
The photovoltaic power generation equipment is connected, and connects the photovoltaic side terminal and the bus side terminal.
10. system according to claim 9, which is characterized in that further include controller, the controller connects the switching
Switching device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910792391.8A CN110401226A (en) | 2019-08-26 | 2019-08-26 | Converter device and photovoltaic generating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910792391.8A CN110401226A (en) | 2019-08-26 | 2019-08-26 | Converter device and photovoltaic generating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110401226A true CN110401226A (en) | 2019-11-01 |
Family
ID=68329126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910792391.8A Pending CN110401226A (en) | 2019-08-26 | 2019-08-26 | Converter device and photovoltaic generating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110401226A (en) |
-
2019
- 2019-08-26 CN CN201910792391.8A patent/CN110401226A/en active Pending
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