CN204794130U - Sinusoidal wave photovoltaic inverter of three -phase - Google Patents
Sinusoidal wave photovoltaic inverter of three -phase Download PDFInfo
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- CN204794130U CN204794130U CN201520515071.5U CN201520515071U CN204794130U CN 204794130 U CN204794130 U CN 204794130U CN 201520515071 U CN201520515071 U CN 201520515071U CN 204794130 U CN204794130 U CN 204794130U
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- converter module
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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
Abstract
The utility model discloses a sinusoidal wave photovoltaic inverter of three -phase, it relates to a dc -to -ac converter, in particular to sinusoidal wave photovoltaic inverter of three -phase. A sinusoidal wave photovoltaic inverter of three -phase, sinusoidal wave photovoltaic inverter of three -phase includes that photovoltaic cell board array, three -phase contravariant power unit, SPWM signal produce circuit and control circuit DSP, detection circuitry, net side electric energy observation circuit and the switch that is incorporated into the power networks. Adopt the utility model provides a sinusoidal wave photovoltaic inverter of three -phase, exportable three -phase 50Hz sine wave alternating current, output is big, and harmonic content is less than and need not step up transformer below 4%, the 10kV and can directly be incorporated into the power networks, and economic benefits is obvious.
Description
Technical field
The utility model relates to a kind of inverter, particularly relates to a kind of three-phase sine-wave photovoltaic DC-to-AC converter, adopts low voltage power devices to realize high-power and exports, and has that power is large, stability contorting and an adjustment inverter output voltage function.
Background technology
During existing photovoltaic DC-to-AC converter mostly is, small-power, adopt 6 phase inversion bridge circuits, output voltage waveforms is square wave, and harmonic content is high, needs out put reactor filtering to realize grid-connected.In, small-power inverter in grid-connected photovoltaic system, because inverter power is little, grid-connected after needing multiple stage inverter parallel, parallel network circuit is complicated, the large and poor reliability of grid-connected difficulty.In jumbo photovoltaic generating system, according to interconnection technology requirement, inverter exports and should be the less sine voltage of the distortion factor, requires higher, require inverter sine wave output voltage to electric power quality.Existing middle low power inverter can not meet Large Copacity photovoltaic generating system technical requirement.
Utility model content
In view of this, the purpose of this utility model is for Problems existing in above-mentioned background technology, provides a kind of three-phase sine-wave photovoltaic DC-to-AC converter.
A kind of three-phase sine-wave photovoltaic DC-to-AC converter, described three-phase sine-wave photovoltaic DC-to-AC converter comprises photovoltaic cell plate array, three-phase inversion power cell, SPWM signal generating circuit and control circuit DSP, testing circuit, net side energy monitor circuit and grid-connected switch, photovoltaic cell plate array connects with corresponding converter module, N number of converter module series connection in every phase converter module, SPWM signal generating circuit fiber-optic output with every mutually in N number of converter module connect, control circuit DSP connects with SPWM signal generating circuit, the total output of three-phase inversion power cell connects with grid-connected switch, testing circuit and net side energy monitor circuit all connect with control circuit DSP.
Preferably, described testing circuit comprises Current Transmit a, CTb, CTc and voltage transformer pt.
Preferably, in described three-phase sine-wave photovoltaic DC-to-AC converter, often mutually N number of converter module output head and the tail series connection, the head end of the first converter module of three-phase inversion power cell connects, photovoltaic cell plate array DC output end positive pole B
+with every mutually in N number of converter module direct-flow input end positive pole IN
+connect, photovoltaic battery array DC output end negative pole B
-with every mutually in N number of converter module direct-flow input end negative pole IN
-connect, often mutually in N number of converter module SPWM signal optical fibre input connect with SPWM signal generating circuit output.
Preferably, control circuit DSP produces the phase signal that three are in hexagonal angle, control circuit DSP lead-out terminal O
1, O
2, O
3respectively with SPWM signal generating circuit input terminal IS
1, IS
2, IS
3connect, SPWM signal generating circuit output S
1, S
2, S
3export the SPWM signal that three groups of phase places are all different with duty ratio, often organize SPWM signal through controlling intelligent acess to corresponding converter module SPWM signal optical fibre input OPF, the pwm voltage superposition that each phase converter module exports produces phase voltage, and three-phase phase voltage is mutually hexagonal angle.
The technical scheme that the utility model provides is visible, the utility model has following technique effect: adopt the present invention exportable three-phase 50Hz sine wave alternating current, power output is large, and harmonic content is less than 4%, below 10kV can direct grid-connected without the need to step-up transformer, and economic benefit clearly.
Accompanying drawing explanation
A kind of three-phase sine-wave photovoltaic DC-to-AC converter circuit theory diagrams that Fig. 1 provides for the utility model.
Embodiment
In order to make those skilled in the art person understand the utility model scheme better, below in conjunction with accompanying drawing, the utility model is described in further detail:
A kind of three-phase sine-wave photovoltaic DC-to-AC converter, described three-phase sine-wave photovoltaic DC-to-AC converter comprises photovoltaic cell plate array, three-phase inversion power cell, SPWM signal generating circuit and control circuit DSP, testing circuit, net side energy monitor circuit and grid-connected switch, photovoltaic cell plate array connects with corresponding converter module, N number of converter module series connection in every phase converter module, SPWM signal generating circuit fiber-optic output with every mutually in N number of converter module connect, control circuit DSP connects with SPWM signal generating circuit, the total output of three-phase inversion power cell connects with grid-connected switch, testing circuit and net side energy monitor circuit all connect with control circuit DSP.
Described testing circuit comprises Current Transmit a, CTb, CTc and voltage transformer pt.
In described three-phase sine-wave photovoltaic DC-to-AC converter, often mutually N number of converter module output head and the tail series connection, the head end of the first converter module of three-phase inversion power cell connects, photovoltaic cell plate array DC output end positive pole B
+with every mutually in N number of converter module direct-flow input end positive pole IN
+connect, photovoltaic battery array DC output end negative pole B
-with every mutually in N number of converter module direct-flow input end negative pole IN
-connect, often mutually in N number of converter module SPWM signal optical fibre input connect with SPWM signal generating circuit output.
Control circuit DSP produces the phase signal that three are in hexagonal angle, control circuit DSP lead-out terminal O
1, O
2, O
3respectively with SPWM signal generating circuit input terminal IS
1, IS
2, IS
3connect, SPWM signal generating circuit output S
1, S
2, S
3export the SPWM signal that three groups of phase places are all different with duty ratio, often organize SPWM signal through controlling intelligent acess to corresponding converter module SPWM signal optical fibre input OPF, the pwm voltage superposition that each phase converter module exports produces phase voltage, and three-phase phase voltage is mutually hexagonal angle.
The above is only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (4)
1. a three-phase sine-wave photovoltaic DC-to-AC converter, it is characterized in that: described three-phase sine-wave photovoltaic DC-to-AC converter comprises photovoltaic cell plate array, three-phase inversion power cell, SPWM signal generating circuit and control circuit DSP, testing circuit, net side energy monitor circuit and grid-connected switch, photovoltaic cell plate array connects with corresponding converter module, N number of converter module series connection in every phase converter module, SPWM signal generating circuit fiber-optic output with every mutually in N number of converter module connect, control circuit DSP connects with SPWM signal generating circuit, the total output of three-phase inversion power cell connects with grid-connected switch, testing circuit and net side energy monitor circuit all connect with control circuit DSP.
2. a kind of three-phase sine-wave photovoltaic DC-to-AC converter according to claim 1, is characterized in that: described testing circuit comprises Current Transmit a, CTb, CTc and voltage transformer pt.
3. a kind of three-phase sine-wave photovoltaic DC-to-AC converter according to claim 1, it is characterized in that: in described three-phase sine-wave photovoltaic DC-to-AC converter, the series connection of every mutually N number of converter module output head and the tail, the head end of the first converter module of three-phase inversion power cell connects, photovoltaic cell plate array DC output end positive pole B
+with every mutually in N number of converter module direct-flow input end positive pole IN
+connect, photovoltaic battery array DC output end negative pole B
-with every mutually in N number of converter module direct-flow input end negative pole IN
-connect, often mutually in N number of converter module SPWM signal optical fibre input connect with SPWM signal generating circuit output.
4. a kind of three-phase sine-wave photovoltaic DC-to-AC converter according to claim 1, is characterized in that: control circuit DSP produces the phase signal that three are in hexagonal angle, control circuit DSP lead-out terminal O
1, O
2, O
3respectively with SPWM signal generating circuit input terminal IS
1, IS
2, IS
3connect, SPWM signal generating circuit output S
1, S
2, S
3export the SPWM signal that three groups of phase places are all different with duty ratio, often organize SPWM signal through controlling intelligent acess to corresponding converter module SPWM signal optical fibre input OPF, the pwm voltage superposition that each phase converter module exports produces phase voltage, and three-phase phase voltage is mutually hexagonal angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520515071.5U CN204794130U (en) | 2015-07-15 | 2015-07-15 | Sinusoidal wave photovoltaic inverter of three -phase |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520515071.5U CN204794130U (en) | 2015-07-15 | 2015-07-15 | Sinusoidal wave photovoltaic inverter of three -phase |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204794130U true CN204794130U (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520515071.5U Active CN204794130U (en) | 2015-07-15 | 2015-07-15 | Sinusoidal wave photovoltaic inverter of three -phase |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186552A (en) * | 2015-07-15 | 2015-12-23 | 天津伟力盛世节能科技股份有限公司 | Three-phase sine wave photovoltaic inverter |
-
2015
- 2015-07-15 CN CN201520515071.5U patent/CN204794130U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186552A (en) * | 2015-07-15 | 2015-12-23 | 天津伟力盛世节能科技股份有限公司 | Three-phase sine wave photovoltaic inverter |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |