CN208522650U - A kind of gird-connected inverter and its booster circuit - Google Patents
A kind of gird-connected inverter and its booster circuit Download PDFInfo
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- CN208522650U CN208522650U CN201820671440.3U CN201820671440U CN208522650U CN 208522650 U CN208522650 U CN 208522650U CN 201820671440 U CN201820671440 U CN 201820671440U CN 208522650 U CN208522650 U CN 208522650U
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Abstract
The utility model relates to a kind of gird-connected inverter and its booster circuits, booster circuit includes interference filtering module, boost module and Voltage stabilizing module, interference filtering module includes first capacitor and the second capacitor, boost module is connected after first capacitor and the second capacitor are in parallel, boost module includes inductance, diode and switching tube, inductance is connected to the second capacitor both ends after connecting with switching tube, the anode of diode is separately connected the anode of inductance and switching tube, diode is used to connect Voltage stabilizing module with switching tube after connecting, Voltage stabilizing module includes at least two concatenated capacitors.The utility model is arranged first capacitor by interference filtering module and filters out low-frequency disturbance, High-frequency Interference is filtered out by the way that the second capacitor is arranged, it boosts in the electric current that boost module exports solar panel, then the stabilization that booster circuit DC side busbar voltage is kept by Voltage stabilizing module, i.e., improve the voltage endurance capability of booster circuit by the series connection of capacitor.
Description
Technical field
The utility model belongs to technical field of new energy power generation, and in particular to a kind of gird-connected inverter and its booster circuit.
Background technique
Currently, photovoltaic battery panel is required to generate electricity by gird-connected inverter connection power grid in solar power system,
The numerous photovoltaic panel of conventional high-power photovoltaic inverter usage quantity is powered by series connection to photovoltaic DC-to-AC converter, but photovoltaic scene
Situation is complicated, often has least a portion of photovoltaic panel and is blocked, once there is the illumination of some photovoltaic panel to weaken, entire photovoltaic array
Generating efficiency will sharply decline, this just seriously constrains the raising of photovoltaic power station power generation efficiency.
To solve the above problems, miniature grid-connected inverter has obtained tremendous development in recent years, there is non-isolated topology knot
The miniature grid-connected photovoltaic inverter of structure, i.e. gird-connected inverter are not provided with transformer, and gird-connected inverter includes sequentially connected BOOST
Booster circuit, inverter circuit and grid-connected output circuit, wherein inverter circuit connects power grid by grid-connected output circuit.It is this inverse
Become device energy and be directly delivered to rear class from prime, without transformer, energy loss is small for centre, and generating efficiency is high.
In the prior art, notification number provides a kind of " transless photovoltaic merging for the Chinese patent of CN101582592B
Inverter and its control method ", BOOST booster circuit in parallel network reverse device as shown in Figure 1, the booster circuit not
Foot place is, there are High-frequency Interference and low-frequency disturbance in circuit, influences the power quality sent to power grid, also, export
DC side busbar voltage is unstable.
Utility model content
The purpose of the utility model is to provide a kind of gird-connected inverter and its booster circuits, for solving existing BOOST liter
There is high and low frequency interference in volt circuit.
In order to solve the above technical problems, the utility model proposes a kind of BOOST booster circuits of gird-connected inverter, including dry
It disturbs and filters out module and boost module, interference filtering module includes first capacitor and the second capacitor, and first capacitor and the second capacitor are simultaneously
Boost module is connected after connection, and the capacitance of first capacitor is greater than the capacitance of the second capacitor；Boost module include inductance, diode and
The series arm of switching tube, inductance and switching tube is connected to the second capacitor both ends, and the anode of diode is separately connected inductance and opens
The series arm of the anode of pass pipe, diode and switching tube is used to connect the inverter circuit of gird-connected inverter.
First capacitor is arranged by interference filtering module in the utility model, realizes the inhibition of low-frequency disturbance, passes through setting
Second capacitor realizes the inhibition of High-frequency Interference, to guarantee to boost to solar panel output without the electric current of interference.
In order to keep the stabilization of booster circuit DC side busbar voltage, further, the string of the diode and switching tube
Connection branch is connected with Voltage stabilizing module, and Voltage stabilizing module includes at least two concatenated capacitors, is used for after the capacitor series connection of Voltage stabilizing module
The inverter circuit for connecting gird-connected inverter is kept the stabilization of booster circuit DC side busbar voltage by Voltage stabilizing module, that is, passed through
The series connection of capacitor improves the voltage endurance capability of booster circuit.
For protective switch pipe, further, the control terminal of booster circuit connects the switching tube by first resistor
Control electrode, first resistor are used for current limliting, and protective switch pipe prevents switching signal from being switched by low level jump to damage when high level
The control electrode of pipe.The control electrode of the switching tube passes through the cathode of second resistance connection switch pipe, and second resistance is pull down resistor,
When switching tube does not control signal, it is ensured that the control electrode of switching tube is in low level state, prevents switching tube from misleading.
It further include the driving circuit for controlling the switching tube, the driving circuit further to realize the driving of switching tube
Including PNP type triode, NPN type triode, 3rd resistor and the 4th resistance, wherein the collector connection of NPN type triode is just
Power supply, the base stage of NPN type triode connect the control terminal of driving circuit by 3rd resistor；The collector of PNP type triode connects
The base stage on ground, PNP type triode connects the control terminal by the 4th resistance, and the emitter-base bandgap grading of PNP type triode connects three pole of NPN type
Connecting pin is drawn for connecting in the connection branch road of the emitter-base bandgap grading of pipe, the emitter-base bandgap grading of the emitter-base bandgap grading and NPN type triode of PNP type triode
The control terminal of BOOST booster circuit.
In order to filter out the High-frequency Interference after boost module, further, the both ends of the switching tube and diode are also
It is connected with third capacitor.In order to filter out the High-frequency Interference after Voltage stabilizing module, further, the Voltage stabilizing module is also distinguished simultaneously
It is associated with the 4th capacitor and the 5th resistance.
In order to solve the above technical problems, the utility model also proposes a kind of gird-connected inverter, including BOOST booster circuit and
Inverter circuit, BOOST booster circuit include interference filtering module and boost module, and interference filtering module includes first capacitor and
Boost module is connected after two capacitors, first capacitor and the second capacitor are in parallel, and the capacitance of first capacitor is greater than the appearance of the second capacitor
Value；Boost module includes inductance, diode and switching tube, and the series arm of inductance and switching tube is connected to the second capacitor both ends,
The anode of diode is separately connected the anode of inductance and switching tube, and the series arm of diode and switching tube is for connecting inversion electricity
Road.
In order to guarantee the stabilization of booster circuit DC side busbar voltage, further, the diode is connected with switching tube
Branch is connected with Voltage stabilizing module, and Voltage stabilizing module includes at least two concatenated capacitors, for connecting after the capacitor series connection of Voltage stabilizing module
Connect the inverter circuit of gird-connected inverter.
In order to increase the rate of rise of booster circuit, further, using at least two BOOST booster circuits it is in parallel after connect
The inverter circuit.
Further, the control terminal of booster circuit connects the control electrode of the switching tube, the switching tube by first resistor
Control electrode pass through the cathode of second resistance connection switch pipe.
It further, further include the driving circuit for controlling the switching tube, which includes PNP type triode, NPN type
Triode, 3rd resistor and the 4th resistance, wherein the collector of NPN type triode connects positive supply, the base of NPN type triode
Pole connects control terminal by 3rd resistor；The base stage of the grounded collector of PNP type triode, PNP type triode passes through the 4th electricity
Resistance connects the control terminal, the emitter-base bandgap grading of the emitter-base bandgap grading connection NPN type triode of PNP type triode, the emitter-base bandgap grading of PNP type triode with
Draw the control terminal that connecting pin is used to connect BOOST booster circuit in the connection branch road of the emitter-base bandgap grading of NPN type triode.
In order to filter out the High-frequency Interference after boost module, further, the both ends of the switching tube and diode are also
It is connected with third capacitor.In order to filter out the High-frequency Interference after Voltage stabilizing module, further, the Voltage stabilizing module is also distinguished simultaneously
It is associated with the 4th capacitor and the 5th resistance.
In order to avoid the high voltage generated by failure is applied directly to system caused by power grid when the failure of existing inverter
System instability problem, further, the output end of the inverter circuit connect grid-connected output circuit, and grid-connected output circuit includes altogether
Mould signal filter module, difference mode signal filter module and varistor, wherein the input terminal connection of common-mode signal filter module is inverse
The output end on power transformation road, common-mode signal filter module connects difference mode signal filter module, the output end of difference mode signal filter module
It is connected in parallel varistor, varistor is for connecting power grid.
The higher voltage generated when fault of converter in order to prevent influences grid stability, further, the differential mode letter
By fuse for connecting power grid after the output end of number filter module is in parallel with varistor.
For filtering common mode interference, further, common-mode signal filter module includes common mode reactor and the 5th capacitor, common mode
First group interface of reactor is the input terminal of common-mode signal filter module, the 5th electricity of the second group interface parallel connection of common mode reactor
Difference mode signal filter module is connected after appearance.
In order to filter out DM EMI, further, the difference mode signal filter module includes the 6th capacitor and the 7th capacitor, the
Two groups of ports are drawn respectively after six capacitors and the series connection of the 7th capacitor, wherein one group of port is for connection common mode signal filter module
Output end, another group of port are the output end of difference mode signal filter module.
It further include further for acquiring the inverter circuit to acquire the voltage and current of inverter circuit output
The sample circuit of the voltage and current of output, including the first operational amplifier and second operational amplifier, the first operational amplifier
As voltage follower, input terminal is used to acquire the voltage and current of the inverter circuit output, the first operational amplifier
Output end is used to connect an input terminal of second operational amplifier, for zooming in and out to the waveform of acquisition and level boost.
In order to carry out translation adjustment to the collected waveform of sample circuit, further, second operational amplifier it is another
A input terminal is connected with adjusting potentiometer, for translating in vertical direction to collected waveform.
Detailed description of the invention
Fig. 1 is a kind of BOOST booster circuit schematic diagram in the prior art；
Fig. 2 is a kind of BOOST booster circuit and inverter circuit schematic diagram of the utility model；
Fig. 3 is a kind of schematic diagram of gird-connected inverter；
Fig. 4 is a kind of drive circuit schematic diagram of booster circuit；
Fig. 5 is a kind of driving chip structure chart of inverter circuit；
Fig. 6 is a kind of grid-connected output circuit schematic diagram of gird-connected inverter；
Fig. 7 is a kind of sample circuit schematic diagram of grid-connected output circuit.
Specific embodiment
Specific embodiment of the present utility model is further described with reference to the accompanying drawing.
Embodiment one:
The utility model proposes a kind of gird-connected inverter with BOOST booster circuit, BOOST booster circuit includes dry
It disturbs and filters out module, boost module and Voltage stabilizing module, interference filtering module includes first capacitor and the second capacitor, first capacitor and
Boost module is connected after two capacitors are in parallel, and the capacitance of first capacitor is greater than the capacitance of the second capacitor；Boost module include inductance,
Diode and switching tube, inductance are connected to the second capacitor both ends after connecting with switching tube, the anode of diode is separately connected inductance
With the anode of switching tube, diode is used to connect Voltage stabilizing module with switching tube after connecting, Voltage stabilizing module includes at least two series connection
Capacitor, for connecting the inverter circuit of gird-connected inverter after the capacitor series connection of Voltage stabilizing module.
The utility model is arranged first capacitor by interference filtering module and filters out low-frequency disturbance, is filtered by the second capacitor of setting
Except High-frequency Interference, boosts in the electric current that boost module exports solar panel, booster circuit is then kept by Voltage stabilizing module
The stabilization of DC side busbar voltage improves the voltage endurance capability of booster circuit by the series connection of capacitor.
The control terminal of booster circuit passes through the control electrode of first resistor connection switch pipe, and the control electrode of switching tube passes through second
The cathode of resistance connection switch pipe.Wherein, first resistor is used for current limliting, and protective switch pipe prevents switching signal from being jumped by low level
Become the control electrode that switching tube is damaged when high level；Second resistance is used for when switching tube does not control signal, it is ensured that switching tube
Control electrode be in low level state, prevent switching tube from misleading.
The inverter of the utility model is as shown in figure 3, BOOST booster circuit connects inverter circuit, the output of inverter circuit
End connects grid-connected output circuit, further includes driving the driving circuit of switching tube in BOOST booster circuit, opening in driving inverter circuit
The driving circuit of pipe is closed, and acquires the sample circuit for the voltage and current that grid-connected output circuit is conveyed to power grid.
Specifically, the driving in order to realize switching tube, the driving circuit for controlling switching tube in BOOST booster circuit include
PNP type triode, NPN type triode, 3rd resistor and the 4th resistance, wherein the collector of NPN type triode connects positive electricity
Source, the base stage of NPN type triode connect the control terminal of driving circuit by 3rd resistor；The grounded collector of PNP type triode,
The base stage of PNP type triode connects above-mentioned control terminal by the 4th resistance, and the emitter-base bandgap grading of PNP type triode connects NPN type triode
Emitter-base bandgap grading, connecting pin is drawn for connecting in the connection branch road of the emitter-base bandgap grading of the emitter-base bandgap grading and NPN type triode of PNP type triode
The control terminal of BOOST booster circuit.Inverter circuit in Fig. 3 is bridge inverter main circuit, and the switching tube of bridge inverter main circuit uses
IR2110 chip is driven.
The both ends of above-mentioned switching tube and diode are also connected with third capacitor, for filtering out the high frequency after boost module
Interference.Voltage stabilizing module is also parallel with the 4th capacitor and the 5th resistance respectively, for filtering out the High-frequency Interference after Voltage stabilizing module.
The grid-connected output circuit of the utility model includes common-mode signal filter module, difference mode signal filter module and pressure-sensitive electricity
Resistance, wherein the input terminal of common-mode signal filter module connects inverter circuit, and the output end of common-mode signal filter module connects differential mode
Signal filter module, the output end of difference mode signal filter module are connected in parallel varistor and for connecting power grid.Pass through common mode
The interference of signal filter module filtering common mode, filters out DM EMI by difference mode signal filter module, by grid-connected output circuit
The varistor of middle addition prevents from being applied directly to cause electric system unstable on power grid when inverter breaks down.
The higher voltage generated when fault of converter in order to prevent influences grid stability, further, the differential mode letter
By fuse for connecting power grid after the output end of number filter module is in parallel with varistor.
Common-mode signal filter module for filtering common mode interference includes common mode reactor and the 5th capacitor, common mode reactor
The first group interface be common-mode signal filter module input terminal, connect after the second group interface of common mode reactor the 5th capacitor in parallel
Connect difference mode signal filter module.
Difference mode signal filter module for filtering out DM EMI includes the 6th capacitor and the 7th capacitor, the 6th capacitor and the
Two groups of ports are drawn respectively after the series connection of seven capacitors, wherein one group of port is used for the output end of connection common mode signal filter module, separately
One group of port is the output end of difference mode signal filter module.
It further include voltage and electricity for acquiring inverter circuit output to acquire the voltage and current of inverter circuit output
The sample circuit of stream, as shown in fig. 7, comprises the first operational amplifier and second operational amplifier, chip model are selected
LM358, the first operational amplifier as voltage follower, input terminal PV_ID be used to acquire inverter circuit output voltage and
Electric current, the output end of the first operational amplifier is used to connect an input terminal of second operational amplifier, for the wave to acquisition
Shape zooms in and out and level boost.
In order to carry out translation adjustment to the collected waveform of sample circuit, further, second operational amplifier it is another
A input terminal is connected with adjusting potentiometer, for translating in vertical direction to collected waveform.
Embodiment two:
A kind of single-phase photovoltaic miniature grid-connected inverter of double BOOST circuits as shown in Figure 3, including double BOOST boosting electricity
Road, inverter circuit, grid-connected output circuit, driving circuit, sample circuit and logic control circuit.Wherein, double BOOST booster circuits
Realize the boost function of the voltage of photovoltaic panel output；The high voltage direct current that BOOST circuit generates is reverse by DC/AC inverter circuit
The acceptable alternating current of power grid；Metal-oxide-semiconductor driving current realizes the control to device for power switching in main circuit topological structure；It adopts
Sample electric current realizes the sampling to photovoltaic panel output voltage electric current, inverter output voltage electric current and network voltage and frequency；It patrols
It collects control section and the function such as the logic control to DC/DC and DC/AC and the processing of sampled signal is realized by TMS320F28335
Energy；Grid-connected output par, c circuit realizes the connection of inverter and power grid.
Double BOOST booster circuits are as shown in Fig. 2, BOOST1 is that BOOST circuit, BOOST2 are other BOOST all the way all the way
Circuit, the voltage that photovoltaic panel exports individually can be increased to 400V, form double BOOST DC/DC circuits after in parallel by them,
It boosts rapider, DC bus-bar voltage is more stable, and ripple is smaller.BOOST circuit selects the inductance and model of a 1mH
The power MOS pipe of FSW25N50A.FSW25N50A is N-type metal-oxide-semiconductor, its pressure-resistant 500V, and operating current is up to 25A, on-state electricity
Resistance is only 0.18 ohm.In figure, the model 470uf/ of the model 105/630A, C11, C12, C25 and C27 of capacitor C4, C23
Model 330K Ω/1W of 250V, resistance R12, R23.
The driving of the power MOS pipe Q1 and Q7 of double BOOST booster circuits are all made of the push-pull type that complementary triode is constituted and drive
It is dynamic, to improve the frequency of the PWM of driving.Specific driving circuit as shown in figure 4, include PNP type triode, NPN type triode,
Resistance R6 and resistance R7, wherein the collector connection+15V positive supply of NPN type triode, the base stage of NPN type triode pass through electricity
Hinder the control terminal PWM3H of R6 connection driving circuit；The base stage of the grounded collector of PNP type triode, PNP type triode passes through electricity
Hinder R7 connection control terminal PWM3H, the emitter-base bandgap grading of the emitter-base bandgap grading connection NPN type triode of PNP type triode, the emitter-base bandgap grading of PNP type triode
The control terminal that connecting pin A is used to connect BOOST booster circuit is drawn with the connection branch road of the emitter-base bandgap grading of NPN type triode.
Inverter circuit selects single-phase bridge topological structure, by power MOS pipe Q2, Q3, Q4 of four model FSW25N50A
It is constituted with Q5, as shown in Fig. 2, realizing the inversion by direct current to alternating current.The power MOS pipe FSW25N50A master of inverter circuit
It to be driven using the IR2110 driving chip of IR company production.IR2110 chip is the MOSFET driving chip of high speed, energy
Simultaneously drive a bridge arm, be very suitable for the driving for bridge inverter main circuit, as shown in figure 5, in figure capacitor C32 model
10uF/25V。
Grid-connected output circuit mainly realizes the grid-connected of inverter output AC electricity, and the alternating current of inverter output usually contains
More clutter will affect the waveform of power grid, can also interfere with the normal work of neighbouring electronic equipment, these interference can usually divide
For common mode interference and DM EMI.In order to inhibit above-mentioned interference, the grid-connected output circuit of the present embodiment is as shown in fig. 6, inverter
The alternating current of output passes through common mode reactor first and filters, and using X safety capacitor C21, is interfered with filtering common mode.Filtering common mode
The DM EMI in output alternating current, the connection of capacitor C19 and C20 are filtered out by two safety Y capacitances C19 and C20 after interference
Branch road connection reference potential or ground.It is likely to occur under nonserviceabling in order to avoid device and high pressure is applied directly on power grid
Situation finally adds varistor RV1 in grid-connected output circuit.
The utility model uses two-stage type Topology Structure Design photovoltaic DC-to-AC converter, and prime is the DC/DC of double BOOST structures
Circuit, rear class are DC/AD circuits.Double BOOST structure DC bus-bar voltages are more stable, output electric current is bigger, when the starting of complete machine
Between it is also shorter.In addition, the inverter of the utility model is with respect to conventional inverter, DC side input power is higher, energy transmission
Efficiency is also higher, and DC side busbar voltage Wen Bogeng is small, and the alternating voltage waveform of output is also more stable, and harmonic content is more
It is few.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, for this field
Technical staff for, various modifications and changes may be made to the present invention.Within the spirit and principle of the utility model,
Any modification, equivalent replacement, improvement and so on should be included within the scope of the claims of the utility model.
Claims (19)
1. a kind of booster circuit of gird-connected inverter, which is characterized in that including interference filtering module and boost module, interference filtering
Module includes first capacitor and the second capacitor, first capacitor and the second capacitor it is in parallel after connect boost module, and first capacitor
Capacitance is greater than the capacitance of the second capacitor；Boost module includes inductance, diode and switching tube, the series arm of inductance and switching tube
The second capacitor both ends are connected to, the anode of diode is separately connected the anode of inductance and switching tube, the string of diode and switching tube
Connection branch is used to connect the inverter circuit of gird-connected inverter.
2. the booster circuit of gird-connected inverter according to claim 1, which is characterized in that the diode and switching tube
Series arm is connected with Voltage stabilizing module, and Voltage stabilizing module includes at least two concatenated capacitors, uses after the capacitor series connection of Voltage stabilizing module
In the inverter circuit of connection gird-connected inverter.
3. the booster circuit of gird-connected inverter according to claim 1, which is characterized in that the control terminal of booster circuit passes through
First resistor connects the control electrode of the switching tube, and the control electrode of the switching tube passes through the negative of second resistance connection switch pipe
Pole.
4. the booster circuit of gird-connected inverter according to claim 1, which is characterized in that further include controlling the switching tube
Driving circuit, which includes PNP type triode, NPN type triode, 3rd resistor and the 4th resistance, wherein NPN
The collector of type triode connects positive supply, and the base stage of NPN type triode connects the control terminal of driving circuit by 3rd resistor；
The base stage of the grounded collector of PNP type triode, PNP type triode connects the control terminal, three pole of positive-negative-positive by the 4th resistance
The emitter-base bandgap grading of the emitter-base bandgap grading connection NPN type triode of pipe, the connection branch of the emitter-base bandgap grading of the emitter-base bandgap grading and NPN type triode of PNP type triode
The upper control terminal drawn connecting pin and be used to connect BOOST booster circuit.
5. the booster circuit of gird-connected inverter according to claim 1, which is characterized in that the switching tube and diode
Both ends are also connected with third capacitor.
6. the booster circuit of gird-connected inverter according to claim 2, which is characterized in that the Voltage stabilizing module is also distinguished simultaneously
It is associated with the 4th capacitor and the 5th resistance.
7. a kind of gird-connected inverter, including BOOST booster circuit and inverter circuit, which is characterized in that BOOST booster circuit includes
Interference filtering module and boost module, interference filtering module include first capacitor and the second capacitor, first capacitor and the second capacitor
Boost module is connected after parallel connection, and the capacitance of first capacitor is greater than the capacitance of the second capacitor；Boost module includes inductance, diode
And switching tube, the series arm of inductance and switching tube are connected to the second capacitor both ends, the anode of diode be separately connected inductance and
The series arm of the anode of switching tube, diode and switching tube is for connecting inverter circuit.
8. gird-connected inverter according to claim 7, which is characterized in that the series arm of the diode and switching tube connects
It is connected to Voltage stabilizing module, Voltage stabilizing module includes at least two concatenated capacitors, grid-connected for connecting after the capacitor series connection of Voltage stabilizing module
The inverter circuit of inverter.
9. gird-connected inverter according to claim 7, which is characterized in that connect after at least two BOOST booster circuits are in parallel
Connect the inverter circuit.
10. gird-connected inverter according to claim 7, which is characterized in that the control terminal of booster circuit passes through first resistor
The control electrode of the switching tube is connected, the control electrode of the switching tube passes through the cathode of second resistance connection switch pipe.
11. gird-connected inverter according to claim 7, which is characterized in that further include the driving electricity for controlling the switching tube
Road, the driving circuit include PNP type triode, NPN type triode, 3rd resistor and the 4th resistance, wherein NPN type triode
Collector connect positive supply, the control terminal that the base stage of NPN type triode passes through 3rd resistor connection driving circuit；Positive-negative-positive three
The base stage of the grounded collector of pole pipe, PNP type triode connects the control terminal by the 4th resistance, and PNP type triode is penetrated
Pole connects the emitter-base bandgap grading of NPN type triode, and the connection branch road of the emitter-base bandgap grading of the emitter-base bandgap grading and NPN type triode of PNP type triode is drawn
Connecting pin is used to connect the control terminal of BOOST booster circuit.
12. gird-connected inverter according to claim 7, which is characterized in that the both ends of the switching tube and diode also connect
It is connected to third capacitor.
13. gird-connected inverter according to claim 8, which is characterized in that the Voltage stabilizing module is also parallel with the 4th respectively
Capacitor and the 5th resistance.
14. gird-connected inverter according to claim 7, which is characterized in that the output end connection of the inverter circuit is grid-connected
Output circuit, grid-connected output circuit include common-mode signal filter module, difference mode signal filter module and varistor, wherein altogether
The input terminal of mould signal filter module connects inverter circuit, and the output end connection difference mode signal of common-mode signal filter module filters mould
Block, the output end of difference mode signal filter module are connected in parallel varistor, and varistor is for connecting power grid.
15. gird-connected inverter according to claim 14, which is characterized in that the output end of the difference mode signal filter module
By fuse for connecting power grid after in parallel with varistor.
16. gird-connected inverter according to claim 14, which is characterized in that common-mode signal filter module includes common mode reactance
Device and the 5th capacitor, the first group interface of common mode reactor are the input terminal of common-mode signal filter module, the of common mode reactor
Difference mode signal filter module is connected after two group interfaces the 5th capacitor of parallel connection.
17. the described in any item gird-connected inverters of 4-16 according to claim 1, which is characterized in that the difference mode signal filters mould
Block includes the 6th capacitor and the 7th capacitor, two groups of ports is drawn respectively after the 6th capacitor and the series connection of the 7th capacitor, wherein one group of end
Mouth is used for the output end of connection common mode signal filter module, and another group of port is the output end of difference mode signal filter module.
18. gird-connected inverter according to claim 7, which is characterized in that further include defeated for acquiring the inverter circuit
The sample circuit of voltage and current out, including the first operational amplifier and second operational amplifier, the first operational amplifier are made
For voltage follower, input terminal is used to acquire the voltage and current of the inverter circuit output, the first operational amplifier it is defeated
Outlet is used to connect an input terminal of second operational amplifier, for zooming in and out to the waveform of acquisition and level boost.
19. gird-connected inverter according to claim 18, which is characterized in that another input terminal of second operational amplifier
It is connected with adjusting potentiometer, for translating in vertical direction to collected waveform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820671440.3U CN208522650U (en) | 2018-05-07 | 2018-05-07 | A kind of gird-connected inverter and its booster circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820671440.3U CN208522650U (en) | 2018-05-07 | 2018-05-07 | A kind of gird-connected inverter and its booster circuit |
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| Publication Number | Publication Date |
|---|---|
| CN208522650U true CN208522650U (en) | 2019-02-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113612375A (en) * | 2021-05-07 | 2021-11-05 | 宁波市芯能微电子科技有限公司 | High-frequency filter circuit |
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2018
- 2018-05-07 CN CN201820671440.3U patent/CN208522650U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113612375A (en) * | 2021-05-07 | 2021-11-05 | 宁波市芯能微电子科技有限公司 | High-frequency filter circuit |
| CN113612375B (en) * | 2021-05-07 | 2023-06-23 | 宁波市芯能微电子科技有限公司 | High-frequency filter circuit |
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