CN108233753A - Single-stage three-phase voltage source inverter with series connection magnetic integrated switch L.C. network - Google Patents
Single-stage three-phase voltage source inverter with series connection magnetic integrated switch L.C. network Download PDFInfo
- Publication number
- CN108233753A CN108233753A CN201810019182.5A CN201810019182A CN108233753A CN 108233753 A CN108233753 A CN 108233753A CN 201810019182 A CN201810019182 A CN 201810019182A CN 108233753 A CN108233753 A CN 108233753A
- Authority
- CN
- China
- Prior art keywords
- magnetic
- inductance
- phase
- network
- energy storage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
-
- 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
- H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
-
- 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
- H02M1/14—Arrangements for reducing ripples from dc input or output
Abstract
A kind of single-stage three-phase voltage source inverter circuit structure with series connection magnetic integrated switch L.C. network, it is sequentially to be cascaded and formed, and magnetic integrated switch L.C. network is in series between input DC power and three phase inverter bridge by input DC power, three phase inverter bridge, Three-phase electric-wave filter, three-phase alternating current load or three-phase AC grid；Magnetic integrated switch L.C. network is that L.C. network is unit cascaded forms for identical with sequentially cascade two by energy storage inductor SLCC types Two-port netwerk switch, the magnetic integrated morphology of three of them energy storage inductor is three inductance magnetic couplings, with other two inductance magnetic coupling arrangement, EE types magnetic core, four column type magnetic cores, EE type magnetic cores is respectively adopted respectively in three decouplings of inductance magnetic, an inductance.This inverter can be by unstable wide scope low-voltage DC single stage shift into stabilization, good three phase sine alternating current, have many advantages, such as that power density is high, conversion efficiency is high, step-up ratio is big, reliability is high, at low cost, suitable for middle high-capacity three-phase inversion occasion.
Description
Technical field
A kind of single-stage three-phase voltage source inverter with series connection magnetic integrated switch L.C. network according to the present invention, belongs to
Power Electronic Technique.
Background technology
Inverter is using a kind of static ac dc converter device of the power semiconductor by DC power conversion into alternating current, for handing over
Current load is used or is generated electricity by way of merging two or more grid systems with AC network.
Since the fossil energies such as oil, coal and natural gas (non-renewable energy resources) growing tension, environmental pollution are serious, global
It warms, nuclear energy production can generate nuke rubbish and pollution reasons, the energy and the environment such as environment have become what the 21 century mankind were faced
Significant problem.The regenerative resources such as solar energy, wind energy, Hydrogen Energy, tide energy and geothermal energy (green energy resource) have cleaning without dirt
The advantages that contaminating, is cheap, is reliable, is abundant, development and utilization is increasingly valued by people, this holds countries in the world economy
Supervention exhibition has considerable meaning.The direct current of the renewable energy conversions such as solar energy, wind energy, Hydrogen Energy, tide energy, geothermal energy
Electric energy is typically unstable, need using inverter be converted into AC energy supply load using or with AC network simultaneously
Net power generation.In the change carry over dc generator, accumulator, solar cell, fuel cell, wind energy conversion system etc. for main dc power supply
It closes, inverter is with a wide range of applications.
At present, the traditional three-phase voltage type PWM inverter circuit structure of middle large capacity inversion occasion generally use.It is this kind of inverse
Become device normal work when must satisfy DC voltage be more than exchange side line voltage peak value, therefore there are one it is apparent the defects of：
When DC voltage (such as photovoltaic cell fan-out capability) reduces, such as rainy days or night, entire electricity generation system will be difficult to normally
Operation, the utilization rate of system decline.In this regard, it is solved frequently with the following two kinds method：(1) prime adds Boost type DC converting
Device or high-frequency isolation type DC-DC converter, increase power conversion series, circuit complexity, loss and cost；(2) output adds
Three-phase main-frequency transformer considerably increases the volume, weight and cost of system, it is difficult to adapt to the copper and iron prices of raw materials and rise sharply
Today.
Therefore, seek a kind of bridge arm need not set dead time, high reliability, single stage circuit structure it is novel have series connection magnetic
The single-stage three-phase voltage source inverter of integrated switch L.C. network is extremely urgent.This efficiently against traditional PWM for converting
Bridge arm existing for device must set the big and of high cost (output of volume weight of dead time, step-up ratio not big enough (non-isolation type), system
Add three-phase main-frequency transformer) the defects of, the output waveform quality, reliability and reduction input side EMI of transformation system are improved, is widened
Power electronics inversion transformation technique and renewable energy power generation technical know-how push the development of generation of electricity by new energy industry and development section
Energy type is respectively provided with important meaning with conservation-minded society.
Invention content
It is a kind of with big step-up ratio, single-stage power conversion, power density height, conversion efficiency the invention aims to provide
It is high, output waveform quality is high, reliability is high, change range of input voltage is wide, it is at low cost, suitable for middle large capacity inversion occasion etc.
The single-stage three-phase voltage source inverter with series connection magnetic integrated switch L.C. network of feature.
Technical program of the present invention lies in：A kind of single-stage three-phase voltage-type with series connection magnetic integrated switch L.C. network is inverse
Become device, be by input DC power, three phase inverter bridge, Three-phase electric-wave filter, three-phase alternating current load or three-phase AC grid sequentially grade
Connection is formed, and magnetic integrated switch L.C. network is in series between input DC power and three phase inverter bridge；The magnetic collection
It is by energy storage inductor L into switch L.C. network0Sequentially cascade two identical SLCC types Two-port netwerk switch L.C. network lists
Member cascade is formed；Each SLCC types Two-port netwerk switch L.C. network unit is by a power diode Sj, an energy storage inductor
Lj, two storage capacitor CjAnd Cj' form, power diode SjCathode and energy storage inductor LjOne end, storage capacitor CjJust
Polar end is connected, energy storage inductor LjThe other end and storage capacitor Cj' positive ends be connected, power diode SjSun
Pole and storage capacitor Cj' negative polarity end be connected, storage capacitor C2Negative polarity end and the first order SLCC types Two-port netwerk switch feel
The storage capacitor C of content network unit1Positive ends be connected, power diode SjWith storage capacitor Cj' connecting pin and energy storage
Capacitance CjNegative polarity end constitute the input port of j-th SLCC types Two-port netwerk switch L.C. network unit, energy storage inductor LjWith
Storage capacitor Cj' connecting pin and storage capacitor CjPositive ends constitute j-th SLCC types Two-port netwerk switch L.C. network list
The output port of member, input DC power positive polarity and storage capacitor C1The connecting pin of negative polarity and power diode S1With energy storage
Capacitance C1' connecting pin between be connected with energy storage inductor L0, energy storage inductor L2With storage capacitor C2' connecting pin and three-phase inversion
The positive pole line end of bridge is connected, wherein j=1,2；The three phase inverter bridge is to bear unidirectional voltage stress and two-way by six
Two quadrant power switch of current stress are formed；Three energy storage inductor L in the magnetic integrated switch L.C. network0、L1、L2Magnetic
Integrated morphology is three inductance magnetic couplings, the decoupling of three inductance magnetic, an inductance respectively with other two inductance magnetic coupling arrangement,
Three energy storage inductor L0、L1、L2Between mutual inductance use M respectively01、M12、M20It represents；Three inductance magnetic coupling arrangements use EE
Type magnetic core, three inductance coils are wound on magnetic core air-gap-free or have on the center pillar of air gap, and magnetic core has on two side columns of air gap
Without winding, mutual inductance M01=M12=M20；Three inductance magnetic decoupling-structures use four column type magnetic cores, three inductance coils point
Not being wound on magnetic core has on three columns of air gap, and air-gap-free and without winding, mutual inductance M on the 4th column of magnetic core01=M12=M20=0；
One inductance is respectively with other two inductance magnetic coupling arrangement using EE type magnetic cores, inductance coil N1Half and inductance
Coil N0Being wound on magnetic core has on a side column of air gap, inductance coil N1The other half and inductance coil N2Being wound on magnetic core has air gap
Another side column on, and magnetic core air-gap-free or have on the center pillar of air gap without winding, mutual inductance M01=M12>>M20。
The present invention will the " traditional single stage three being made of three phase inverter bridge, Three-phase electric-wave filter, (three-phase main-frequency transformer) cascade
Phase pwm converter circuit structure or multi-stage cascade pwm converter circuit structure " be configured to " by magnetic integrated switch L.C. network with
Sequentially cascade three phase inverter bridge, Three-phase electric-wave filter single stage circuit structure in series " has been put forward for the first time with series connection magnetic collection
Into the single-stage three-phase voltage source inverter new concept and circuit structure of switch L.C. network, i.e., by providing sequentially cascade two
Identical SLCC types Two-port netwerk switch L.C. network unit, utilizes the defeated of first order SLCC types Two-port netwerk switch L.C. network unit
Go out the input as second level SLCC types Two-port netwerk switch L.C. network unit to improve the step-up ratio of inverter, magnetic integrated switch
Three energy storage inductor L in L.C. network0、L1、L2Magnetic integrated morphology be three inductance magnetic couplings, the decoupling of three inductance magnetic, one
Inductance respectively with other two inductance magnetic coupling arrangement.The sum of series of L.C. network unit is switched by increasing SLCC types Two-port netwerk
The duty ratio D that magnetizes of inverter energy storage inductor0=T0/TSTo realize the adjusting of inverter step-up ratio, wherein TSFor HF switch week
Time phase, T0It is three phase inverter bridge in a TSThe interior bridge arm direct pass time.
The advantage of the invention is that：The present invention can be by unstable wide variation range low-voltage DC single stage shift into steady
Fixed, good three phase sine alternating current, with single-stage power conversion, power density is high, conversion efficiency is high, step-up ratio is big, three
The advantages that energy storage inductor magnetic integrates, output waveform quality is high, reliability is high, at low cost, it is passive inverse suitable for middle high-capacity three-phase
Become and parallel network reverse occasion.
Description of the drawings
Fig. 1 have the circuit structure of the single-stage three-phase voltage source inverter of series connection magnetic integrated switch L.C. network.
Fig. 2 have the principle waveform of the single-stage three-phase voltage source inverter of series connection magnetic integrated switch L.C. network.
Fig. 3 have the circuit topology example of the single-stage three-phase voltage source inverter of series connection magnetic integrated switch L.C. network
One --- three-phase LC waves circuit diagrams.
Fig. 4 have the circuit topology example of the single-stage three-phase voltage source inverter of series connection magnetic integrated switch L.C. network
Two --- three-phase LCL filtering type circuit diagrams.
Single-stage three-phase voltage source inverter energy storage inductors of Fig. 5 with series connection magnetic integrated switch L.C. network is straight in bridge arm
Logical period D0TSThe equivalent circuit that magnetizes --- S1＇, S3＇, S5＇, S4＇, S6＇, S2＇ is connected.
Single-stage three-phase voltage source inverter energy storage inductors of Fig. 6 with series connection magnetic integrated switch L.C. network is non-in bridge arm
(1-D during straight-through0)TSMagnetic equivalent circuit -- the S that dispels during mode 0 (000)4＇, S6＇, S2＇ is connected and S1＇, S3＇, S5＇ ends.
Single-stage three-phase voltage source inverter energy storage inductors of Fig. 7 with series connection magnetic integrated switch L.C. network is non-in bridge arm
(1-D during straight-through0)TSMagnetic equivalent circuit -- the S that dispels during mode 1 (001)4＇, S5＇, S6＇ is connected and S1＇, S2＇, S3＇ ends.
Single-stage three-phase voltage source inverter energy storage inductors of Fig. 8 with series connection magnetic integrated switch L.C. network is non-in bridge arm
(1-D during straight-through0)TSMagnetic equivalent circuit -- the S that dispels during mode 2 (010)2＇, S3＇, S4＇ is connected and S1＇, S5＇, S6＇ ends.
Single-stage three-phase voltage source inverter energy storage inductors of Fig. 9 with series connection magnetic integrated switch L.C. network is non-in bridge arm
(1-D during straight-through0)TSMagnetic equivalent circuit -- the S that dispels during mode 3 (011)3＇, S4＇, S5＇ is connected and S1＇, S2＇, S6＇ ends.
Single-stage three-phase voltage source inverter energy storage inductors of Figure 10 with series connection magnetic integrated switch L.C. network is non-in bridge arm
(1-D during straight-through0)TSMagnetic equivalent circuit -- the S that dispels during mode 4 (100)1＇, S2＇, S6＇ is connected and S3＇, S4＇, S5＇ ends.
Single-stage three-phase voltage source inverter energy storage inductors of Figure 11 with series connection magnetic integrated switch L.C. network is non-in bridge arm
(1-D during straight-through0)TSMagnetic equivalent circuit -- the S that dispels during mode 5 (101)1＇, S5＇, S6＇ is connected and S2＇, S3＇, S4＇ ends.
Single-stage three-phase voltage source inverter energy storage inductors of Figure 12 with series connection magnetic integrated switch L.C. network is non-in bridge arm
(1-D during straight-through0)TSMagnetic equivalent circuit -- the S that dispels during mode 6 (110)1＇, S2＇, S3＇ is connected and S4＇, S5＇, S6＇ ends.
Single-stage three-phase voltage source inverter energy storage inductors of Figure 13 with series connection magnetic integrated switch L.C. network is non-in bridge arm
(1-D during straight-through0)TSMagnetic equivalent circuit -- the S that dispels during mode 7 (111)1＇, S3＇, S5＇ is connected and S4＇, S6＇, S2＇ ends.
Three energy storage inductor L in Figure 14 magnetic integrated switch L.C. networks0、L1、L2Magnetic coupling arrangement.
Three energy storage inductor L in Figure 15 magnetic integrated switch L.C. networks0、L1、L2Magnetic decoupling-structure.
Energy storage inductor L in Figure 16 magnetic integrated switch L.C. networks1Respectively with energy storage inductor L0、L2Magnetic coupling arrangement.
Figure 17 have the control principle block diagram of the single-stage three-phase voltage source inverter of series connection magnetic integrated switch L.C. network.
Figure 18 have the control principle waveform of the single-stage three-phase voltage source inverter of series connection magnetic integrated switch L.C. network.
Specific embodiment：
Technical scheme of the present invention is described further with reference to the accompanying drawings and embodiments.
Single-stage three-phase voltage source inverter with series connection magnetic integrated switch L.C. network, is by input DC power, three
Phase inverter bridge, Three-phase electric-wave filter, three-phase alternating current load or three-phase AC grid sequentially cascade composition, and in input DC power
Magnetic integrated switch L.C. network is in series between three phase inverter bridge；The magnetic integrated switch L.C. network is by energy storage inductor
L0The sequentially cascade two identical SLCC types Two-port netwerk switch unit cascaded compositions of L.C. network；Each SLCC type Two-port netwerks
It is by a power diode S to switch L.C. network unitj, an energy storage inductor Lj, two storage capacitor CjAnd Cj' form, work(
Rate diode SjCathode and energy storage inductor LjOne end, storage capacitor CjPositive ends be connected, energy storage inductor LjIt is another
End and storage capacitor Cj' positive ends be connected, power diode SjAnode and storage capacitor Cj' negative polarity end be connected
It connects, storage capacitor C2Negative polarity end and the first order SLCC types Two-port netwerk switch L.C. network unit storage capacitor C1Anode
Property end is connected, power diode SjWith storage capacitor Cj' connecting pin and storage capacitor CjNegative polarity end constitute j-th
SLCC types Two-port netwerk switchs the input port of L.C. network unit, energy storage inductor LjWith storage capacitor Cj' connecting pin and energy storage electricity
Hold CjPositive ends constitute the output port of j-th SLCC types Two-port netwerk switch L.C. network unit, input DC power
Positive polarity and storage capacitor C1The connecting pin of negative polarity and power diode S1With storage capacitor C1' connecting pin between be connected with
Energy storage inductor L0, energy storage inductor L2With storage capacitor C2' connecting pin be connected with the positive pole line end of three phase inverter bridge, wherein j=
1、2；The three phase inverter bridge is the two quadrant power switch structures for bearing unidirectional voltage stress and bidirectional current stress by six
Into；Three energy storage inductor L in the magnetic integrated switch L.C. network0、L1、L2Magnetic integrated morphology be three inductance magnetic couplings, three
The decoupling of a inductance magnetic, an inductance respectively with other two inductance magnetic coupling arrangement, three energy storage inductor L0、L1、L2Between mutual inductance
M is used respectively01、M12、M20It represents；Three inductance magnetic coupling arrangements use EE type magnetic cores, and three inductance coils are wound on magnetic
Core air-gap-free has on the center pillar of air gap, and magnetic core has on two side columns of air gap without winding, mutual inductance M01=M12=M20；It is described
Three inductance magnetic decoupling-structures using four column type magnetic cores, three inductance coils have rotating around in magnetic core on three columns of air gap,
And air-gap-free and without winding, mutual inductance M on the 4th column of magnetic core01=M12=M20=0；One inductance respectively with remaining two
A inductance magnetic coupling arrangement uses EE type magnetic cores, inductance coil N1Half and inductance coil N0Being wound on magnetic core has one of air gap
On side column, inductance coil N1The other half and inductance coil N2Being wound on magnetic core has on another side column of air gap, and magnetic core air-gap-free
Or have on the center pillar of air gap without winding, mutual inductance M01=M12>>M20。
Single-stage three-phase voltage source inverter circuit structure and principle waveform with series connection magnetic integrated switch L.C. network, point
Not as shown in Figure 1, 2.In Fig. 1,2, UiFor input direct-current voltage, ZLa、ZLb、ZLcPassive load impedance, u are exported for three-phasea、ub、
ucThe phase voltage of passive load impedance or three-phase AC grid voltage, i are exported for three-phasea、ib、icPassive load is exported for three-phase
The phase current of impedance or three-phase AC grid electric current.Magnetic integrated switch L.C. network is by energy storage inductor L0Sequentially cascade two
A identical SLCC types Two-port netwerk switch unit cascaded composition of L.C. network, each SLCC types Two-port netwerk switch L.C. network unit
It is by a power diode Sj, an energy storage inductor Lj, two storage capacitor CjAnd Cj' form, magnetic integrated switch L.C. network
In three energy storage inductor L0、L1、L2Magnetic integrated morphology be three inductance magnetic couplings, the decoupling of three inductance magnetic, an inductance difference
With other two inductance magnetic coupling arrangement；Three phase inverter bridge is to bear unidirectional voltage stress and bidirectional current stress by six
Two quadrant power switch are formed；Three-phase electric-wave filter is filtered for three-phase LC wave filters (during three-phase alternating current passive load) or three-phase LCL
Device (when three-phase AC grid loads)；Input DC power UiIt can set or be not provided between magnetic integrated switch L.C. network and is defeated
Enter wave filter, the pulsation of input direct-current electric current can be reduced when input filter is set.When three phase inverter bridge bridge arm direct pass, input
DC power supply UiWith all storage capacitors to energy storage inductor L0、L1、L2It magnetizes, three-phase output passive load ZLa、ZLb、ZLcOr three
Phase AC network ua、ub、ucIt maintains to power by Three-phase electric-wave filter；When one switch conduction of three phase inverter bridge bridge arm, another opens
When closing cut-off, energy storage inductor L0、L1、L2Dispel magnetic and with input DC power UiIt is cooperatively defeated to all storage capacitors, three-phase
Go out passive load ZLa、ZLb、ZLcOr three-phase AC grid ua、ub、ucPower supply.Magnetic integrated switch L.C. network and three phase inverter bridge will
Input direct-current voltage UiThe high-frequency impulse that of same size, amplitude is modulated by six times of output frequency sinusoidal envelope line gauge rule variations is straight
Galvanic electricity presses u1, three phase inverter bridge is by u1It is reverse into amplitude difference, pulsewidth modulates phase voltage by the three-phase tri-state that sinusoidal rule changes
u2a、u2b、u2c, high-quality three phase sine phase voltage u is obtained after filtered on three-phase passive loada、ub、ucOr on three phase network
Obtain high-quality three phase sine phase current ia、ib、ic。
It is of the present invention have series connection magnetic integrated switch L.C. network single-stage three-phase voltage source inverter, be utilize according to
The identical SLCC types Two-port netwerk switch L.C. network unit of cascade two of sequence and first order Two-port netwerk switch L.C. network list
The output of member switchs the input of L.C. network unit to improve the single stage circuit structure of inverter step-up ratio for second level Two-port netwerk,
There is differences substantially with single-stage three-phase Voltage Source PWM Inverter or multi-stage cascade PWM inverter circuit structure.Therefore,
Single-stage three-phase inverter of the present invention has novelty and creativeness, and with efficient (meaning that energy loss is small), work(
Rate density height (meaning that volume, weight are small), step-up ratio (mean that variation range is wider or lower input direct-current voltage can greatly
Be transformed into required three-phase output AC voltage or three-phase output power network current), three energy storage inductor magnetic integrate, output waveform
The advantages that THD is low, reliability is high, at low cost, application prospect is extensive is a kind of ideal energy-saving type three-phase inverter,
It vigorously advocates to build and has more important value energy-saving, conservation-minded society today.
With series connection magnetic integrated switch L.C. network single-stage three-phase voltage source inverter circuit topology embodiment, as Fig. 3,
Shown in 4.Fig. 3 is three-phase LC filtering type circuits, suitable for the inversion occasion higher to output waveform quality requirement；Fig. 4 is three-phase
LCL filtering type circuits, suitable for inversion occasion higher to output waveform quality requirement.In Fig. 3, circuit shown in 4, three-phase inversion
Bridge selects MOSFET element, and the devices such as IGBT, GTR also can be selected.The single-stage three-phase inverter can will be a kind of unstable
Low-voltage DC (such as accumulator, photovoltaic cell, fuel cell, wind energy conversion system) is transformed into required stabilization, high-quality, high pressure three
Phase sinusoidal ac is widely used in middle large capacity, the civilian industry inverter for occasion of boosting (such as communicates inverter and photovoltaic
Gird-connected inverter 24VDC/380V50HzAC, 48VDC/380V50HzAC, 96VDC/380V50HzAC) and national defense industry inversion electricity
Source (such as Aviation Static Inverter 27VDC/200V400HzAC).
Each energy storage inductor of single-stage three-phase voltage source inverter with series connection magnetic integrated switch L.C. network is at one
HF switch cycle TSThe magnetic that inside magnetizes and dispel is each primary, D during corresponding bridge arm direct pass during magnetizing0TS, and correspond to bridge during magnetic of dispelling
The non-straight-through period (1-D of arm0)TS(including to during two zero vectors outer during exchange side output energy, bridge arm direct pass).Three-phase
The drive signal of three bridge arm upper, lower tubes of inverter bridge is complementary, if being represented respectively with " 1 ", " 0 " when upper tube conducting, cut-off, three
Phase inverter bridge has 0 (000), 1 (001), 2 (010), 3 (011), 4 (100), 5 (101), 6 (110), 7 (111) eight kinds of Working moulds
State.Wherein, 0 (000) and 7 (111) two mode are two outer during bridge arm direct pass traditional zero vectors；And 1 (001), 2
(010), 3 (011), 4 (100), 5 (101), 6 (110) six mode are effective vector, this six mode include a, b, c three-phase
All equivalent circuits during the positive and negative half cycle of output voltage.Inverter energy storage inductor D during bridge arm direct pass0TSMagnetize
The non-straight-through period (1-D of equivalent circuit, bridge arm0)TSThe corresponding magnetic equivalent circuit of dispelling of eight mode, respectively as Fig. 5,6,7,8,9,
10th, shown in 11,12,13.In figure, output voltage ua、ub、ucPolarity for reference direction, and each current polarity is actual direction.
If storage capacitor terminal voltage is in a HF switch cycle TSIt is inside invariable, uses UC1、UC2、Uc′1、Uc′2Table
Show.Energy storage inductor D during bridge arm direct pass as shown in Figure 50TSThe equivalent circuit that magnetizes can obtain,
Energy storage inductor is in the non-straight-through period (1-D of bridge arm as shown in Fig. 6,7,8,9,10,11,12,130)TSEight mode
Corresponding magnetic equivalent circuit of dispelling can obtain,
If the voltage magnitude of three-phase inversion bridge DC side is U1, can must supplement equation
Ui+UC1+U′C1+U′C2=U1 (3.1)
Ui+UC1+UC2+U′C2=U1 (3.2)
According to State-space Averaging Principle, formula (1) × D0+ formula (2) × (1-D0), it enablesAssociation type
(3), magnetic integrated switch L.C. network storage capacitor voltage value UC1、UC2、Uc′1、Uc′2For
The voltage magnitude U of three-phase inversion bridge DC side1For
In formula (5), 3D0＜ 1, i.e. D0＜ 1/3.If the index of modulation of three phase inverter bridge is M (0 ＜ M≤1-D0), then have
Voltage transfer ratio (the output phase voltage u of the single-stage three-phase voltage source inverter of series connection magnetic integrated switch L.C. networka、ub、ucWith
Input voltage UiThe ratio between) be
By formula (6) it is found that the voltage transfer ratio of the three-phase inverter is more than traditional single stage three-phase voltage type PWM inverter
Voltage transfer ratio M/2, and in different M and D0During value voltage transfer ratio exist be less than, equal to and more than 1 three kinds situations.When
M/2 ＞ 1-3D0When, the voltage transfer ratio of the converter is more than 1, and so as to embody its superiority, this converter rises higher
Pressure ratio is realized by increasing the unit series of magnetic integrated switch L.C. network.
Three energy storage inductor L in Fig. 3, magnetic integrated switch L.C. network shown in 40、L1、L2Magnetic integrated morphology be three electricity
Feel magnetic coupling, the decoupling of three inductance magnetic, an inductance respectively with other two inductance magnetic coupling arrangement, such as Figure 14,15,16 and table
Shown in 1.
1 three kinds of magnetic integrated morphology project plan comparisons of table
Three energy storage inductor L shown in Figure 140、L1、L2Magnetic coupling arrangement is using the realization of EE types magnetic core, three energy storage inductor lines
Enclose N0、N1、N2It is wound on the center pillar of magnetic core air-gap-free (such as FERRITE CORE) or has on the center pillar of air gap (such as powder core magnetic
Core), and magnetic core has on two side columns of air gap without winding, three energy storage inductor coil N0、N1、N2In electric current iL0、iL1、iL2Production
Raw magnetic flux ΨL0、ΨL1、ΨL2It is Ψ, center pillar magnetic flux is 3 Ψ, and two side column magnetic fluxes are 3 Ψ/2, three energy storage electricity
Feel L0、L1、L2Between mutual inductance M01=M12=M20.It is obtained by formula (4)
Have at this time
uab=ucd=uef=u (8)
It considers
Due to L0=L1=L2=L, M01=M12=M20=M, so having
Equivalent inductance is
L0eq=L1eq=L2eq=L+2M (11)
It enablesThen k01=k12=k20=k, has
L0eq=L1eq=L2eq=L (1+2k) (12)
Due to 0<k<1, then have
L0eq=L1eq=L2eq=L (1+2k) ＞ L (13)
Three energy storage inductor L shown in Figure 150、L1、L2Magnetic decoupling-structure is using the realization of four column type magnetic cores, three energy storage inductors
Coil N0、N1、N2Have on three columns of air gap rotating around in magnetic core, and air-gap-free and without winding on the 4th column of magnetic core, three storages
It can inductance coil N0、N1、N2In electric current iL0、iL1、iL2The magnetic flux Ψ of generationL0、ΨL1、ΨL2It is Ψ, three have air gap column
It is Ψ, three energy storage inductor L with the magnetic flux on the 4th air-gap-free column0、L1、L2Between magnetic decoupling i.e. three energy storage inductors
Mutual inductance M01=M12=M20=0.So sensibility reciprocal is constant, the equivalent inductance amount of three energy storage inductors is still respectively L0、L1、L2。
Energy storage inductor L shown in Figure 161Respectively with energy storage inductor L0、L2Magnetic coupling arrangement realizes that energy storage is electric using EE types magnetic core
Feel coil N1Half and energy storage inductor coil N0Being wound on magnetic core has on a side column of air gap, energy storage inductor coil N1It is another
Half and energy storage inductor coil N2Being wound on magnetic core has on another side column of air gap, and without winding (such as iron on magnetic core air-gap-free center pillar
Ferrite core) or have on air gap center pillar without winding (such as powder core magnetic core), three energy storage inductor coil N0、N1、N2In electric current
iL0、iL1、iL2The magnetic flux Ψ of generationL0、ΨL1、ΨL2, two magnetic flux Ψ having on the side column of air gapL0+ΨL1With ΨL1+ΨL2
Equal, magnetic flux is zero on center pillar, three energy storage inductor L0、L1、L2Between mutual inductance M01=M12>>M20, for center pillar air-gap-free
The magnetic cores such as ferrite, M20≈0.By formula (8), (9), it is contemplated that L0=L2,M01=M12, thenAfter abbreviation
It solves
Three energy storage inductor L0、L1、L2Equivalent inductance be respectively
Enable the coefficient of coupThen
Enable formula (17.1) ＞ L0, formula (17.2) ＞ L1, obtain
So k01Value be
Work as M20=0, i.e. k20When=0
If N0=N1=N2, i.e. L0=L2=2L1, then
Single-stage three-phase voltage source inverter with series connection magnetic integrated switch L.C. network only has single-stage power conversion link,
Its control system needs to realize the control of the storage capacitor voltage and output voltage (grid-connected current) of magnetic integrated switch L.C. network,
Also need to realize the MPPT maximum power point tracking control MPPT of photovoltaic cell during supplying power for photovoltaic cell.Therefore, this three-phase inverter
Using the three-phase output voltage with magnetic integrated switch L.C. network storage capacitor voltage feedforward control or three-phase grid electric current wink
Duration rectifying and wave-filtering feeds back SPWM control strategies, as shown in Figure 17,18.Three-phase output voltage or three-phase grid current instantaneous value are whole
Stream filtering feedback SPWM control strategies are used for adjusting the modulation ratio M of transformation system, and magnetic integrated switch L.C. network storage capacitor
Voltage UC2Feed-forward Control Strategy is used for adjusting the straight-through duty ratio D of transformation system0.Three-phase output voltage or three-phase grid electric current wink
Duration rectifying and wave-filtering feedback signal UofWith reference voltage UrIt is obtained after comparison, error amplification for controlling three-phase reference sine wave
uar、ubr、ucrThe signal (characterization Sine Modulated is than signal M) of amplitude, storage capacitor voltage feedback signal UC2fWith storage capacitor electricity
Press reference signal UC2rSignal u is obtained after comparison, error amplificationd(the straight-through duty cycle signals D of characterization0)；uar、ubr、ucr、udAnd its
Inversion signal respectively with triangular carrier ucIt hands over and cuts and exported after appropriate logic circuit three phase inverter bridge S1′、S3′、S5′、
S4′、S6′、S2' control signal.As input voltage UiDuring variation, pass through the straight-through duty cycle signals D of adjusting0To realize storage capacitor
Voltage UC2Stabilization；As output loading ZLWhen changing, output voltage u is realized by adjusting Sine Modulated than signal Mo's
Stablize.Therefore, the single-stage three-phase inverter, which uses, has magnetic integrated switch L.C. network storage capacitor voltage feedforward control
Three-phase output voltage or three-phase grid current instantaneous value rectifying and wave-filtering feedback SPWM control strategies be practicable.
Claims (1)
1. a kind of single-stage three-phase voltage source inverter with series connection magnetic integrated switch L.C. network, it is characterised in that：It is this inverse
It is by input DC power, three phase inverter bridge, Three-phase electric-wave filter, three-phase alternating current load or three-phase AC grid to become device circuit structure
Sequentially cascade is formed, and magnetic integrated switch L.C. network is in series between input DC power and three phase inverter bridge；It is described
Magnetic integrated switch L.C. network be by energy storage inductor L0Sequentially cascade two identical SLCC types Two-port netwerk switch LC
Network element cascade is formed；Each SLCC types Two-port netwerk switch L.C. network unit is by a power diode Sj, a storage
It can inductance Lj, two storage capacitor CjAnd Cj' form, power diode SjCathode and energy storage inductor LjOne end, storage capacitor
CjPositive ends be connected, energy storage inductor LjThe other end and storage capacitor Cj' positive ends be connected, power diode
SjAnode and storage capacitor Cj' negative polarity end be connected, storage capacitor C2Negative polarity end and first order SLCC type Two-port netwerks
Switch the storage capacitor C of L.C. network unit1Positive ends be connected, power diode SjWith storage capacitor Cj' connecting pin
With storage capacitor CjNegative polarity end constitute the input port of j-th SLCC types Two-port netwerk switch L.C. network unit, energy storage
Inductance LjWith storage capacitor Cj' connecting pin and storage capacitor CjPositive ends constitute the switch sense of j-th SLCC types Two-port netwerk
The output port of content network unit, input DC power positive polarity and storage capacitor C1The connecting pin of negative polarity and power diode
S1With storage capacitor C1' connecting pin between be connected with energy storage inductor L0, energy storage inductor L2With storage capacitor C2' connecting pin and three
The positive pole line end of phase inverter bridge is connected, wherein j=1,2；The three phase inverter bridge is to bear unidirectional voltage stress by six
It is formed with two quadrant power switch of bidirectional current stress；Three energy storage inductor L in the magnetic integrated switch L.C. network0、L1、
L2Magnetic integrated morphology be three inductance magnetic couplings, the decoupling of three inductance magnetic, an inductance respectively with other two inductance magnetic coupling
Close structure, three energy storage inductor L0、L1、L2Between mutual inductance use M respectively01、M12、M20It represents；Three inductance magnetic coupling knots
Structure uses EE type magnetic cores, and three inductance coils are wound on magnetic core air-gap-free or have on the center pillar of air gap, and magnetic core has the two of air gap
Without winding, mutual inductance M on a side column01=M12=M20；Three inductance magnetic decoupling-structures use four column type magnetic cores, three electricity
Sense coil has rotating around in magnetic core on three columns of air gap, and air-gap-free and without winding, mutual inductance M on the 4th column of magnetic core01=M12
=M20=0；One inductance is respectively with other two inductance magnetic coupling arrangement using EE type magnetic cores, inductance coil N1One
Half and inductance coil N0Being wound on magnetic core has on a side column of air gap, inductance coil N1The other half and inductance coil N2It is wound on magnetic
Core has on another side column of air gap, and magnetic core air-gap-free or has on the center pillar of air gap without winding, mutual inductance M01=M12>>M20。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810019182.5A CN108233753A (en) | 2018-01-09 | 2018-01-09 | Single-stage three-phase voltage source inverter with series connection magnetic integrated switch L.C. network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810019182.5A CN108233753A (en) | 2018-01-09 | 2018-01-09 | Single-stage three-phase voltage source inverter with series connection magnetic integrated switch L.C. network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108233753A true CN108233753A (en) | 2018-06-29 |
Family
ID=62640443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810019182.5A Withdrawn CN108233753A (en) | 2018-01-09 | 2018-01-09 | Single-stage three-phase voltage source inverter with series connection magnetic integrated switch L.C. network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108233753A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113922690A (en) * | 2021-08-16 | 2022-01-11 | 青岛理工大学 | Improved three-coupling-inductor quasi-Z-source boost inverter and control method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102946209A (en) * | 2012-11-30 | 2013-02-27 | 福州大学 | Single-stage three-phase large step-up ratio series voltage type quasi-impedance source inverter |
-
2018
- 2018-01-09 CN CN201810019182.5A patent/CN108233753A/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102946209A (en) * | 2012-11-30 | 2013-02-27 | 福州大学 | Single-stage three-phase large step-up ratio series voltage type quasi-impedance source inverter |
Non-Patent Citations (3)
| Title |
|---|
| 杜少武 等: "磁集成技术的发展与展望", 《高科技与产业化》 * |
| 钱海 等: "磁集成技术在Classic E变换器中的应用", 《电源学报》 * |
| 陈乾宏 等: "磁集成变换器研究方法中的两点改进", 《第二届电力电子与运动控制学术年会论文集 APSC"2001》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113922690A (en) * | 2021-08-16 | 2022-01-11 | 青岛理工大学 | Improved three-coupling-inductor quasi-Z-source boost inverter and control method |
| CN113922690B (en) * | 2021-08-16 | 2023-11-07 | 青岛理工大学 | Improved three-coupling inductance quasi-Z source boost inverter and control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108199597A (en) | Single-stage three-phase voltage source inverter with cascade magnetic integrated switch L.C. network | |
| CN105553266B (en) | A kind of crisscross parallel high-gain Boost translation circuits and its working method | |
| CN103036397B (en) | Single-level single-phase large-step-up-ratio cascade connection voltage type convertor of quasi impedance source | |
| CN102158107B (en) | Single-stage single-phase current type inverter with high step-up ratio | |
| CN101951154B (en) | Isolation type active clamping interleaving paralleled bidirectional DC-DC converter | |
| CN103986330B (en) | A kind of resonance step-up DC/DC conversion device and its control method suitable for high-power occasion | |
| CN109245589A (en) | Three port integrated inverse device of single-stage three-phase high gain boost type | |
| CN105281361B (en) | A kind of five-level double step-down combining inverter | |
| CN105846696A (en) | Two-stage type AC-DC converter and control method thereof | |
| CN107134937A (en) | A kind of three level multiple-pulses output transformerless inverter circuit | |
| CN103036398B (en) | Single-level single-phase large-step-up-ratio cascade connection voltage type convertor of quasi impedance source | |
| CN102832838A (en) | Isolated single-level double-Sepic inverter based on magnetic integration | |
| CN110350816A (en) | A kind of single-stage and-phase current source inverter of energy storage inductor parallel connection Active Snubber Circuit | |
| CN104811075B (en) | A kind of control method of combined converter | |
| CN201797440U (en) | Coupling inductance realizing isolated bidirectional direct current-direct current converter | |
| CN101951155B (en) | Soft switching isolated bidirectional DC-DC converter with coupling inductors | |
| CN206865369U (en) | Three level multiple-pulses export transformerless inverter circuit | |
| CN102176643B (en) | Single-stage three-phase current type inverter with large step-up ratio | |
| CN102938620B (en) | Single-stage three-phase cascade voltage-type quasi-impedance source inverter with large step-up ratio | |
| CN106899203A (en) | Positive activation type five-electrical level inverter | |
| CN108233753A (en) | Single-stage three-phase voltage source inverter with series connection magnetic integrated switch L.C. network | |
| CN202798466U (en) | Isolated-type new energy power supply unit based on three-port power converter | |
| CN109842311A (en) | A kind of grid-connected micro- inverter of three port inverse-excitation types and modulator approach with power decoupling circuit | |
| CN109818494A (en) | A kind of quasi- source Y DC-DC converter of high gain voltage type | |
| CN108155780A (en) | Single-stage and-phase voltage source converter with cascade magnetic integrated switch L.C. network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180629 |
|
| WW01 | Invention patent application withdrawn after publication |