CN105932896B - A kind of photovoltaic combining inverter and its suppressing method inhibited with common mode current - Google Patents
A kind of photovoltaic combining inverter and its suppressing method inhibited with common mode current Download PDFInfo
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- CN105932896B CN105932896B CN201610367965.3A CN201610367965A CN105932896B CN 105932896 B CN105932896 B CN 105932896B CN 201610367965 A CN201610367965 A CN 201610367965A CN 105932896 B CN105932896 B CN 105932896B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
- H01F3/14—Constrictions; Gaps, e.g. air-gaps
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/123—Suppression of common mode voltage or current
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Inverter Devices (AREA)
Abstract
A kind of common mode current inhibits inverter, including：Solar energy pole plate PV, an output terminal of solar energy pole plate PV is linked in sequence one end of capacitance C2 and the first end of poor common mode inductance L1, another output terminal of solar energy pole plate PV is linked in sequence the second end of one end of capacitance C1, one end of capacitance C3 and poor common mode inductance L1, wherein the first end of the difference common mode inductance and the second end of the poor common mode inductance are Same Name of Ends.C1 is solar energy pole plate, over the ground parasitic capacitance, C2, C3 midpoint connection C4, L1 be integrated-type difference common mode inductance, L2, IG1, D1 form BOST booster circuits, and CD is busbar filter capacitor, midpoint connection C7, IG2 IG5 the composition full bridge inverter of C5, C6, L3, C8, C9 form differential mode filter circuit, L3 is integrated-type difference common mode inductance, and L5 is common mode inductance.
Description
Technical field
The present invention relates to a kind of photovoltaic combining inverters and its suppressing method inhibited with common mode current, belong to photovoltaic hair
Electric energy source domain.
Background technology
Non-isolated photovoltaic grid-connected inverter structure is free of transformer, has conversion efficiency height, small, light-weight, into
This low absolute predominance, still, the missing of transformer causes solar energy pole plate and power grid to have electrical connection, and common mode current is substantially
Degree increases, it is possible to bring safety problem.So how to reduce common mode current, become the research hotspot of photovoltaic combining inverter
One of.
The minimum for limiting common-mode voltage is made every effort in a series of appearance of control algolithms, and nonetheless, common mode current is also very
It is difficult to control below the mark.
Invention content
According to the present invention, on the basis of common-mode voltage is reduced as possible, common mode filtering circuit is added in, thus by common mode current
It is strict controlled in below the mark.
An embodiment according to the present invention provides a kind of photovoltaic combining inverter inhibited with common mode current, this is inverse
Become device to include：An output terminal of solar energy pole plate PV, solar energy pole plate PV are linked in sequence one end of capacitance C2 and poor common mode electricity
Feel the first end of L1, another output terminal of solar energy pole plate PV be linked in sequence one end of capacitance C1, one end of capacitance C3 and
The second end of poor common mode inductance L1, wherein the first end of the difference common mode inductance and the second end of the poor common mode inductance are of the same name
End.Capacitance C2 connects capacitance C4 with the midpoint of capacitance C3.One end of the third end connection inductance L2 of poor common mode inductance L1, poor common mode
The 4th end of inductance L1 be linked in sequence the emitter of insulated gate bipolar transistor IG1, one end of capacitance Cd, capacitance C6 one
The emitter at end, the emitter of insulated gate bipolar transistor IG4 and insulated gate bipolar transistor IG5.Inductance L2's is another
One end is connected to the anode of diode D1 and the collector of insulated gate bipolar transistor IG1, and the other end of capacitance C1 is connected to
First ground terminal and the second ground terminal.The cathode of diode D1 be serially connected to the other end of capacitance Cd, capacitance C5 one end, absolutely
The collector of edge grid bipolar transistor IG2 collectors and insulated gate bipolar transistor IG3.The other end of capacitance C5 is connected to
The other end of capacitance C6 and one end of capacitance C7.The emitter connection insulated gate bipolar of insulated gate bipolar transistor IG2 is brilliant
The collector of body pipe IG4, the current collection of the emitter connection insulated gate bipolar transistor IG5 of insulated gate bipolar transistor IG3
The midpoint of pole, insulated gate bipolar transistor IG2 and insulated gate bipolar transistor IG4 are connected to the first of poor common mode inductance L3
The midpoint of end, insulated gate bipolar transistor IG3 and insulated gate bipolar transistor IG5 are connected to the second of poor common mode inductance L3
End, the third end of poor common mode inductance L3 are connected to one end of capacitance C8 and the first end of poor common mode inductance L5, poor common mode inductance L3
The 4th end be connected to one end of capacitance C9 and the second end of poor common mode inductance L5, wherein the first end of poor common mode inductance L3 and the
Four ends are Same Name of Ends, and the third end of poor common mode inductance L5 is connected to power grid one end, and the 4th end of poor common mode inductance L5 is connected to electricity
The other end of net and the second ground terminal, the first end and second end of poor common mode inductance L5 is Same Name of Ends.The other end of capacitance C4 is suitable
The secondary other end for being connected to capacitance C7, the other end of capacitance C8 and the other end of capacitance C9.
According to one embodiment of present invention, the difference common mode inductance L1 is identical with poor common mode inductance L5, and newel opens gas
The width of gap, wherein air gap is configured according to required inductance value, and the inductance value of air gap and required differential mode inductance amount are into anti-
Than.
According to one embodiment of present invention, the air gap of the poor common mode inductance L3 is opened on the side column of both sides.
According to one embodiment of present invention, the air gap on the air gap and right side side column on the column of the left side side is each
From including upper and lower two air gaps, wherein upper air gap and lower air gap be made ofs two opposite right angled triangles, wherein going up air gap
Two right angles of two right angled triangles be located above and be oppositely arranged positioned at both sides, the magnetic that two right angled triangles are surrounded
Core point upward, wherein two right angles of two right angled triangles of lower air gap are located at lower section and are oppositely arranged positioned at both sides, two
The core tip that a right angled triangle is surrounded is downward.
According to one embodiment of present invention, it is assumed that the core length for winding the coil of the left and right sides side column carries out 5
Decile, wherein being divided into 5 grade point distance one etc. between left side and the upper air gap on the column of right side side and lower air gap
Twice of point distance, but the upper air gap of the upper air gap of left side side column and right side side column is staggered in height a decile away from
From.
According to one embodiment of present invention, right angled triangle in the height direction straight in each upper and lower air gap
The length of the arm of angle meets following condition：
Wherein x represents the length of the right-angle side of right angled triangle in the height direction in upper and lower air gap, μ0Represent Vacuum Magnetic
Conductance, N represent the number of turn of left or right side side column coil, and Ae represents the sectional area of side column, when L represents maximum current
Required inductance value, the ripple limit value when inductance value is by maximum output current determine.
According to one embodiment of present invention, the width of the newel of the poor common mode inductance L3 is much smaller than left and right sides side
The width of side column, described be much smaller than refer to difference an order of magnitude.
An embodiment according to the present invention provides a kind of method that common mode current inhibition is carried out using above-mentioned inverter.
Description of the drawings
Attached drawing 1 is the schematic diagram of the photovoltaic combining inverter for having the function of common mode current and inhibiting of the present invention；
Attached drawing 2 is the structure chart of poor common mode one the inductance L1 and L5 in inverter of the present invention；
Attached drawing 3 is the structure chart of poor common mode one inductance L3 in inverter of the present invention；
Attached drawing 4 is the shape of upper air gap used in poor common mode one inductance L3 in the present invention；
Attached drawing 5 is the shape of lower air gap used in poor common mode one inductance L3 in the present invention.
Specific embodiment
Below by the basis of with reference to attached drawing detailed description of the present invention have the function of common mode current inhibit photovoltaic simultaneously
Net inverter and its suppressing method：
This has the function of that the photovoltaic combining inverter that common mode current inhibits includes：Solar energy pole plate PV, solar energy pole plate PV
An output terminal be linked in sequence one end of capacitance C2 and the first end of poor common mode inductance L1, another of solar energy pole plate PV it is defeated
Outlet is linked in sequence the second end of one end of capacitance C1, one end of capacitance C3 and poor common mode inductance L1, wherein the difference common mode
The first end of inductance and the second end of the poor common mode inductance are Same Name of Ends.Capacitance C2 connects capacitance C4 with the midpoint of capacitance C3.
One end of the third end connection inductance L2 of poor common mode inductance L1, the 4th end of poor common mode inductance L1 are linked in sequence insulated gate bipolar
The emitter of transistor IG1, one end of capacitance Cd, one end of capacitance C6, insulated gate bipolar transistor IG4 emitter and
The emitter of insulated gate bipolar transistor IG5.The other end of inductance L2 is connected to the anode and insulated gate bipolar of diode D1
The collector of transistor npn npn IG1, the other end of capacitance C1 are connected to the first ground terminal and the second ground terminal.The cathode of diode D1
It is serially connected to the other end of capacitance Cd, one end of capacitance C5, insulated gate bipolar transistor IG2 collectors and insulated gate bipolar
The collector of transistor npn npn IG3.The other end of capacitance C5 is connected to the other end of capacitance C6 and one end of capacitance C7.Insulated gate is double
The collector of the emitter connection insulated gate bipolar transistor IG4 of bipolar transistor IG2, insulated gate bipolar transistor IG3
Emitter connection insulated gate bipolar transistor IG5 collector, insulated gate bipolar transistor IG2 and insulated gate bipolar
The midpoint of transistor IG4 is connected to the first end of poor common mode inductance L3, insulated gate bipolar transistor IG3 and insulated gate bipolar
The midpoint of transistor npn npn IG5 is connected to the second end of poor common mode inductance L3, and the third end of poor common mode inductance L3 is connected to capacitance C8
One end and poor common mode inductance L5 first end, the 4th end of poor common mode inductance L3 is connected to one end of capacitance C9 and poor common mode electricity
Feel the second end of L5, wherein the first end of poor common mode inductance L3 and the 4th end are Same Name of Ends, the third end of poor common mode inductance L5 connects
Power grid one end is connected to, the 4th end of poor common mode inductance L5 is connected to the other end and the second ground terminal of power grid, poor common mode inductance L5
First end and second end be Same Name of Ends.The other end of capacitance C4 is serially connected to the other end of capacitance C7, and capacitance C8's is another
End and the other end of capacitance C9.
Wherein PV is solar energy pole plate, and C1 is solar energy pole plate, over the ground parasitic capacitance, and midpoint the connection C4, L1 of C2, C3 are
Poor common mode inductance, L2, IG1, D1 composition BOST booster circuits, Cd are busbar DC filter capacitor, and the midpoint of C5, C6 connect C7,
IG2-IG5 forms full bridge inverter, and L3, C8, C9 composition differential mode filter circuits, L3 is poor common mode inductance, and L5 is poor common mode electricity
Sense, wherein L1 and L5 are identical.
Wherein, Fig. 2 shows the structure charts of poor common mode one inductance L1 and L5, are shown 1 and 2 as Same Name of Ends.It is real
Line represents the direction in common mode current magnetic field, and dotted line represents the direction in differential-mode current magnetic field, and wherein newel opens air gap, wherein air gap
Width be configured according to required inductance value, the inductance value of air gap is inversely proportional with required differential mode inductance amount.
Fig. 3 shows the structure chart of poor common mode one inductance L3, and the Same Name of Ends of 3.2 and 3.3 expression coils is shown.
Dotted arrow represents common mode current magnetic direction in figure 3, and solid arrow represents differential-mode current magnetic direction.Hatched example areas represents
Magnetic core distributed areas represent air gap without the white space of oblique line.Coil is carried out 5 etc. by dotted line therein in the longitudinal direction
Point.Air gap therein is opened on the side column of both sides, and 3.6 represent the air gap on the column of left side side, and 3.5 represent on the column of right side side
Air gap.Air gap on wherein each side column includes upper and lower two air gaps, and wherein Fig. 4 shows the shape of air gap, Fig. 5
The shape namely upper air gap and lower air gap for showing lower air gap are made of two opposite right angled triangles, wherein upper air gap
Two right angles of two right angled triangles be located above and be oppositely arranged positioned at both sides, the magnetic that two right angled triangles are surrounded
Core point upward, wherein two right angles of two right angled triangles of lower air gap are located at lower section and are oppositely arranged positioned at both sides, two
The core tip that a right angled triangle is surrounded is downward.Wherein between left side and the upper air gap on the column of right side side and lower air gap
Between be divided into twice of a decile distance in 5 grade point distance, but the upper air gap of left side side column and right side side column
Upper air gap is staggered a decile distance in height.And right angled triangle in the height direction straight in each upper and lower air gap
The length of the arm of angle meets following condition：
Wherein x represents the length of the right-angle side of right angled triangle in the height direction in upper and lower air gap, μ0Represent Vacuum Magnetic
Conductance, N represent the number of turn of left or right side side column coil, and Ae represents the sectional area of side column, and L represents maximum current when institute
The inductance value needed, the ripple limit value when inductance value is by maximum output current determine.
The common mode component of C2-C4, L1, C5-C7, L3, C8, C9 collectively form common mode current and inhibit circuit.Ground wire will be flowed through
Common mode current bypass, can be by drain current limit below standard value.
Control circuit according to the present invention as a result, can solve common mode current in the prior art and be difficult to be suppressed to standard value
Following problem.The technique effect of low common mode current is realized well.It is this to have the technical effect that by the circuit structure of the present invention
Integrally determine, due to the use of the poor common mode inductance of the invention created, during normal work at air gap caused by leakage field opposing connection
The eddy current effect of line is small, because magnetic field can be strapped in magnetic core, air gap therein employs segmentation offset pattern, and leakage field is small.Three
Angular air gap electric current hour inductance is big, and inductance is small when electric current is big, can generate gradually saturation effect.During due to photovoltaic generation, face
Various weather, such as cloudy day rain, and full load is not more, and underloading is few, in this way, such circuit structure, in majority
At light load, it may be such that current ripples are small.
Claims (3)
1. a kind of photovoltaic combining inverter that there is common mode current and inhibit, it is characterised in that：Including：Solar energy pole plate PV,
An output terminal of solar energy pole plate PV is linked in sequence one end of capacitance C2 and the first end of poor common mode inductance L1, solar energy pole plate
Another output terminal of PV is linked in sequence the second end of one end of capacitance C1, one end of capacitance C3 and poor common mode inductance L1,
Described in the first end of poor common mode inductance L1 and the second end of the poor common mode inductance L1 be Same Name of Ends；Capacitance C2's and capacitance C3
Midpoint connection capacitance C4；One end of the third end connection inductance L2 of poor common mode inductance L1, the 4th end sequence of poor common mode inductance L1
Emitter, one end of busbar DC capacitor Cd, one end of capacitance C6, the insulated gate for connecting insulated gate bipolar transistor IG1 are double
The emitter of bipolar transistor IG4 and the emitter of insulated gate bipolar transistor IG5；The other end of inductance L2 is connected to two
The anode of pole pipe D1 and the collector of insulated gate bipolar transistor IG1, the other end of capacitance C1 be connected to the first ground terminal and
Second ground terminal；The cathode of diode D1 be serially connected to the other end of busbar DC filter capacitor Cd, capacitance C5 one end, absolutely
The collector of edge grid bipolar transistor IG2 collectors and insulated gate bipolar transistor IG3；The other end of capacitance C5 is connected to
The other end of capacitance C6 and one end of capacitance C7；The emitter connection insulated gate bipolar of insulated gate bipolar transistor IG2 is brilliant
The collector of body pipe IG4, the current collection of the emitter connection insulated gate bipolar transistor IG5 of insulated gate bipolar transistor IG3
The midpoint of pole, insulated gate bipolar transistor IG2 and insulated gate bipolar transistor IG4 are connected to the first of poor common mode inductance L3
The midpoint of end, insulated gate bipolar transistor IG3 and insulated gate bipolar transistor IG5 are connected to the second of poor common mode inductance L3
End, the third end of poor common mode inductance L3 are connected to one end of capacitance C8 and the first end of poor common mode inductance L5, poor common mode inductance L3
The 4th end be connected to one end of capacitance C9 and the second end of poor common mode inductance L5, wherein the first end of poor common mode inductance L3 and the
Four ends are Same Name of Ends, and the third end of poor common mode inductance L5 is connected to power grid one end, and the 4th end of poor common mode inductance L5 is connected to electricity
The other end of net and the second ground terminal, the first end and second end of poor common mode inductance L5 is Same Name of Ends；The other end of capacitance C4 is suitable
The other end of the secondary other end for being connected to capacitance C7, the other end of capacitance C8 and capacitance C9, the gas of the difference common mode inductance L3
Gap is opened on the side column of both sides, and the air gap on air gap and right side side column on the column of left side side respectively includes upper and lower two
Air gap, wherein upper air gap and lower air gap are made of two opposite right angled triangles, wherein two right angle trigonometries of upper air gap
Two right angles of shape are located above and are oppositely arranged positioned at both sides, and the core tip that two right angled triangles are surrounded is upward,
In two right angles of two right angled triangles of lower air gap be located at lower section and be oppositely arranged positioned at both sides, two right angled triangle institutes
The core tip of encirclement is downward, it is assumed that the core length for winding the coil of the left and right sides side column carries out 5 deciles, wherein left side
It is divided between upper air gap on the column of right side side and lower air gap twice of a decile distance in 5 grade point distance,
A decile distance but the upper air gap of the upper air gap of left side side column and right side side column is staggered in height, it is described each
The length of the right-angle side of right angled triangle in the height direction meets following condition in upper and lower air gap：
Wherein x represents the length of the right-angle side of right angled triangle in the height direction in upper and lower air gap, μ0Represent space permeability,
N represents the number of turn of left or right side side column coil, and Ae represents the sectional area of side column, and L represents required during maximum current
Inductance value, the ripple limit value when inductance value is by maximum output current determine.
2. the photovoltaic combining inverter according to claim 1 that there is common mode current and inhibit, wherein the difference common mode
The width of the newel of inductance L3 is much smaller than the width of left and right sides side column, and described be much smaller than refers to one quantity of difference
Grade.
3. a kind of have the function of that the photovoltaic combining inverter that common mode current inhibits carries out common mode using described in claims 1 or 2
The method that electric current inhibits.
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| EP3322063B1 (en) * | 2016-11-15 | 2022-04-13 | MARICI Holdings The Netherlands B.V. | A multi-channel inverter for a photovoltaic apparatus |
| DE102017222664A1 (en) * | 2017-12-13 | 2019-06-13 | Robert Bosch Gmbh | Common-mode push-pull throttle for an electrically operable motor vehicle |
| CN110535365B (en) * | 2019-08-30 | 2021-07-20 | 合肥工业大学 | Inversion system for three-phase common-mode current and switching loss cooperative suppression |
| CN111245209B (en) * | 2020-01-19 | 2021-08-24 | 珠海格力电器股份有限公司 | Interference signal suppression circuit and electrical equipment |
| CN111313658B (en) * | 2020-03-25 | 2021-06-29 | 广州华凌制冷设备有限公司 | Drive control module and vehicle-mounted air conditioner |
| CN111313685B (en) * | 2020-03-25 | 2021-10-08 | 广州华凌制冷设备有限公司 | Drive control module and vehicle-mounted air conditioner |
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| CN202352466U (en) * | 2011-12-02 | 2012-07-25 | 北京嘉昌机电设备制造有限公司 | Inductance core and inductor |
| CN102714469A (en) * | 2010-01-13 | 2012-10-03 | 株式会社东芝 | Grid-tie inverter |
| CN203554276U (en) * | 2013-11-08 | 2014-04-16 | 美固电子(深圳)有限公司 | Output filter circuit of sine wave vehicular inverter, and sine wave vehicular inverter |
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|---|---|---|---|---|
| CN102714469A (en) * | 2010-01-13 | 2012-10-03 | 株式会社东芝 | Grid-tie inverter |
| CN202352466U (en) * | 2011-12-02 | 2012-07-25 | 北京嘉昌机电设备制造有限公司 | Inductance core and inductor |
| CN203554276U (en) * | 2013-11-08 | 2014-04-16 | 美固电子(深圳)有限公司 | Output filter circuit of sine wave vehicular inverter, and sine wave vehicular inverter |
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