CN207819766U - A kind of switching circuit of photovoltaic DC-to-AC converter BOOST booster circuits - Google Patents
A kind of switching circuit of photovoltaic DC-to-AC converter BOOST booster circuits Download PDFInfo
- Publication number
- CN207819766U CN207819766U CN201820229116.6U CN201820229116U CN207819766U CN 207819766 U CN207819766 U CN 207819766U CN 201820229116 U CN201820229116 U CN 201820229116U CN 207819766 U CN207819766 U CN 207819766U
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- China
- Prior art keywords
- triode
- booster circuits
- relay
- boost booster
- photovoltaic
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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 kind of switching circuit of photovoltaic DC-to-AC converter BOOST booster circuits, including photoelectrical coupler, triode and relay, the I/O mouths of the input terminal connection microcontroller of photoelectrical coupler, the output end of photoelectrical coupler is connected to the base stage of triode, the emitter of triode is grounded, the collector of triode is connected to one end of relay coil, and the other end of relay coil is connected to power supply, and the contact change-over switch of relay is connected in BOOST booster circuits.The utility model is used to solve the unnecessary consumption problem of inverter energy when input voltage reaches maximum power point.
Description
Technical field
The utility model is related to a kind of switching circuits, are a kind of opening for photovoltaic DC-to-AC converter BOOST booster circuits specifically
Powered-down road, belongs to solar energy generation technology field.
Background technology
Component part of the photovoltaic combining inverter as photovoltaic generating system, there is irreplaceable work in the entire system
With being the core component of entire photovoltaic generating system.And the transformation efficiency of inverter also determines the utilization ratio of solar energy, hands over
Stream gird-connected inverter mostly uses greatly two-stage type structure, and major loop is divided into the circuits prime DC/DC and the circuits rear class DC/AC, prime electricity
Road is responsible for being lifted DC voltage, and late-class circuit is responsible for converting DC power supply to AC power.In the mistake of entire boosting and inversion
Cheng Zhong, various switching power devices will consume part energy to influence the efficient energy conversion of inverter.Present inversion
In device booster circuit, after voltage is raised to prescribed requirement by the front end circuits DC/DC, still in open state, energy can be consumed, from
And influence the transformation efficiency of inverter.
Invention content
The technical problem to be solved by the present invention is to provide a kind of switch of photovoltaic DC-to-AC converter BOOST booster circuits electricity
Road solves the unnecessary consumption problem of inverter energy when input voltage reaches maximum power point.
In order to solve the technical problem, the technical solution adopted in the utility model is：A kind of photovoltaic DC-to-AC converter BOOST liters
The input terminal of the switching circuit of volt circuit, including photoelectrical coupler, triode and relay, photoelectrical coupler connects microcontroller
I/O mouths, the output end of photoelectrical coupler is connected to the base stage of triode, the emitter ground connection of triode, the current collection of triode
Pole is connected to one end of relay coil, and the other end of relay coil is connected to power supply, and the contact change-over switch of relay connects
It is connected in BOOST booster circuits.
The switching circuit of photovoltaic DC-to-AC converter BOOST boostings described in the utility model, the output end of photoelectrical coupler and three poles
It is equipped with current limliting between pipe base stage and resistance R1, R2 that triode is reliably saturated, resistance R1 is made to be connected on the output of photoelectrical coupler
Between end and transistor base, resistance R2 is connected between transistor base and ground terminal.
The switching circuit of photovoltaic DC-to-AC converter BOOST boostings described in the utility model, between the collector and power supply of triode
Equipped with the sustained diode 1 for preventing triode from puncturing, the anode of diode D1 is connected to the collector of triode, diode D1
Cathode be connected to power supply.
The switching circuit of photovoltaic DC-to-AC converter BOOST described in the utility model boosting, the contact change-over switch of relay with
The diode D2 for preventing power network current from flowing to switching circuit is equipped between BOOST booster circuits, the anode of diode D2 is connected to
The contact change-over of relay switchs, and the cathode of diode D2 is connected to BOOST booster circuits.
The contact change-over switch of the switching circuit of photovoltaic DC-to-AC converter BOOST boostings described in the utility model, relay is normal
Make and break is closed.
The beneficial effects of the utility model：Inverter prime DC/DC circuits are inverter power main circuit important composition portions
Point, when work, can consume part energy so that the transformation efficiency of inverter reduces, and this programme can not need prime in inverter
Front stage circuits are cut off when booster circuit, reduce energy expenditure, to improve the transformation efficiency of inverter, increase energy utilization rate.
Setting is equipped with sustained diode 1 simultaneously, and relay coil induces larger anti-when can prevent triode from becoming cut-off from being saturated
Puncture triode to electromotive force, be equipped with diode D2, prevent power network current from flowing to switching circuit, equipped with current limliting and makes triode can
By resistance R1, R2 of saturation, it is equipped with photoelectrical coupler, prevents relay electric signal from scurrying into internal system and upsets system balancing, add
Enter photoelectrical coupler and " electrical-optical-electrical " isolation is carried out to input signal.
Description of the drawings
Fig. 1 is the circuit diagram of the utility model.
Specific implementation mode
The utility model is further described in the following with reference to the drawings and specific embodiments.
The output voltage of photovoltaic module increases, and DC/AC inversions output can be maintained to require, will no longer be required to booster circuit pair
Photovoltaic module output voltage boosts, and inverter bridge can be sent directly into after DC voltage is filtered and carries out direct current to exchange
Conversion, and the presence of Boost circuit can reduce the efficiency of system when need not boost, and the present embodiment is in prime
The switching circuit that Boost circuit is added in the design of DC/DC circuits makes system when photovoltaic module output voltage is sufficiently large
Time can be detached from Boost circuit work.
As shown in Figure 1, a kind of switching circuit of photovoltaic DC-to-AC converter BOOST booster circuits, including photoelectrical coupler, triode
And relay, the I/O mouths of the input terminal connection microcontroller of photoelectrical coupler, the output end of photoelectrical coupler are connected to triode
Base stage, the emitter ground connection of triode, the collector of triode is connected to one end of relay coil, relay coil it is another
One end is connected to power supply, and the contact change-over switch of relay is connected in BOOST booster circuits.
It is equipped with current limliting in the present embodiment, between the output end and transistor base of photoelectrical coupler and triode is made reliably to satisfy
Resistance R1, R2 of sum, resistance R1 are connected between the output end of photoelectrical coupler and transistor base, and resistance R2 is connected to three poles
Between pipe base stage and ground terminal.
In the present embodiment, the sustained diode 1 for preventing triode from puncturing is equipped between the collector and power supply of triode,
The anode of diode D1 is connected to the collector of triode, and the cathode of diode D1 is connected to power supply.Diode D1 is prevented three
Relay coil induces larger inverse electromotive force breakdown triode when pole pipe becomes cut-off from being saturated.
In the present embodiment, being equipped between the contact change-over switch and BOOST booster circuits of relay prevents power network current stream
To the diode D2 of switching circuit, the anode of diode D2 is connected to the contact change-over switch of relay, the cathode of diode D2
It is connected to BOOST booster circuits.
In the present embodiment, the contact change-over switch of relay is normally closed switch.
When voltage is sufficiently large, DSP output signals control relay contacts are converted into normally closed in normally opened working condition
Working condition, and then by Boost circuit short circuit, meanwhile, DSP stops to Boost circuit output pwm signal, shutdown IGBT work.
Described above is only the basic principle and preferred embodiment of the utility model, and those skilled in the art are according to this reality
With the novel improvement and replacement made, belong to the scope of protection of the utility model.
Claims (5)
1. a kind of switching circuit of photovoltaic DC-to-AC converter BOOST booster circuits, it is characterised in that：Including photoelectrical coupler, triode
And relay, the I/O mouths of the input terminal connection microcontroller of photoelectrical coupler, the output end of photoelectrical coupler are connected to triode
Base stage, the emitter ground connection of triode, the collector of triode is connected to one end of relay coil, relay coil it is another
One end is connected to power supply, and the contact change-over switch of relay is connected in BOOST booster circuits.
2. the switching circuit of photovoltaic DC-to-AC converter BOOST booster circuits according to claim 1, it is characterised in that：Photoelectricity coupling
It is equipped with current limliting between the output end and transistor base of clutch and makes resistance R1, R2 that triode is reliably saturated, resistance R1 series connection
Between the output end and transistor base of photoelectrical coupler, resistance R2 is connected between transistor base and ground terminal.
3. the switching circuit of photovoltaic DC-to-AC converter BOOST booster circuits according to claim 1, it is characterised in that：Triode
Collector and power supply between be equipped with the sustained diode 1 for preventing triode from puncturing, the anode of diode D1 is connected to triode
Collector, the cathode of diode D1 is connected to power supply.
4. the switching circuit of photovoltaic DC-to-AC converter BOOST booster circuits according to claim 1, it is characterised in that：Relay
Contact change-over switch and BOOST booster circuits between be equipped with and prevent power network current from flowing to the diode D2 of switching circuit, two poles
The anode of pipe D2 is connected to the contact change-over switch of relay, and the cathode of diode D2 is connected to BOOST booster circuits.
5. the switching circuit of photovoltaic DC-to-AC converter BOOST booster circuits according to claim 1, it is characterised in that：Relay
Contact change-over switch be normally closed switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820229116.6U CN207819766U (en) | 2018-02-09 | 2018-02-09 | A kind of switching circuit of photovoltaic DC-to-AC converter BOOST booster circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820229116.6U CN207819766U (en) | 2018-02-09 | 2018-02-09 | A kind of switching circuit of photovoltaic DC-to-AC converter BOOST booster circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207819766U true CN207819766U (en) | 2018-09-04 |
Family
ID=63320023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820229116.6U Active CN207819766U (en) | 2018-02-09 | 2018-02-09 | A kind of switching circuit of photovoltaic DC-to-AC converter BOOST booster circuits |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207819766U (en) |
-
2018
- 2018-02-09 CN CN201820229116.6U patent/CN207819766U/en active Active
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