CN106230297A - A kind of multifunctional intellectual bi-directional inverter - Google Patents
A kind of multifunctional intellectual bi-directional inverter Download PDFInfo
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- CN106230297A CN106230297A CN201610790262.1A CN201610790262A CN106230297A CN 106230297 A CN106230297 A CN 106230297A CN 201610790262 A CN201610790262 A CN 201610790262A CN 106230297 A CN106230297 A CN 106230297A
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- output capacitance
- isolating transformer
- filter unit
- power conversion
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Classifications
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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
- H02M7/53871—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 with automatic control of output voltage or current
- H02M7/53873—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 with automatic control of output voltage or current with digital control
-
- 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
- H02M7/539—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 with automatic control of output wave form or frequency
- H02M7/5395—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 with automatic control of output wave form or frequency by pulse-width modulation
Abstract
The present invention relates to electronic circuit field, particularly relate to a kind of multifunctional intellectual bi-directional inverter, including continuous input cell, the first power conversion unit, the second power conversion unit, the first filter unit, the second filter unit, isolation energy-storage units, load outputs mouth and grid interface unit, isolation energy-storage units is used for carrying out electrical isolation, regulation voltage and storing output energy, first filter unit and the second filter unit are all connected with isolation energy-storage units, and load outputs mouth is all connected with isolation energy-storage units with grid interface unit.The present invention can meet the multifunctional intellectual bi-directional inverter of 110Vac and 220Vac electrical network and loading demand simultaneously, solves power frequency bi-directional inverter step-up ratio in low pressure energy-storage system excessive simultaneously, the problem of power ascension more difficulty.
Description
Technical field
The present invention relates to electronic circuit field, particularly relate to a kind of multifunctional intellectual bi-directional inverter.
Background technology
Bi-directional inverter is energy conversion unit most crucial in energy-storage system, traditional energy storage bi-directional inverter topology
Mainly there are power frequency isolation structure and high-frequency isolation structure, as it is shown in figure 1, be mainly all by continuous input cell 1, power change of current list
Unit 2, filter unit 3, isolating transformer 4, output capacitance 5, grid interface unit 6, loading interfaces unit 7 form；Wherein direct current
Input block 1 includes photovoltaic battery panel input interface, also includes energy storage battery input interface and sample circuit, power change of current list
Unit 2 is made up of four switching transistors, and its major function is by DC-AC two-way change of current function, if direct current is to exchange
The change of current, then energy transmits to rear class from continuous input cell 1；If the alternating-current/direct-current change of current, then single to direct current input by rear class
Unit 1 transmission；In three-phase system, power convertor unit 2 is then made up of six switching transistors, and switching transistor is not limited to a certain
Plant transistor, as long as the high frequency switching elements being used as switch motion all arranges at this；Filter unit 3 is by two inductance and an electric capacity
Composition, its structure is not limited to this LLC (π) type structure, it is also possible to be LCL (T-type structure) or a simple LC (electricity
Sense) structure, it is mainly used as output filtering purposes, its output voltage is labeled as VL0-N0；Isolating transformer 4 is become by a power frequency isolation
Depressor, is mainly used as using with electrical isolation and regulation voltage, and its output voltage is labeled as VL-N, VL0-N0With VL-NRatio be
The no-load voltage ratio of isolating transformer 13；Input capacitance 5 is the outfan of isolating transformer 4, also serves as exporting energy storage device；Electrical network
Interface unit 6 comprises and network relay, EMC filter circuit, sample circuit etc., this unit control to be intended to electrical network be connected to break
Open, have software to control to be intended to electrical network and carry out energy exchange；Loading interfaces unit 7 is primarily used to powering load, its energy source
Comprise continuous input cell 1 and grid interface unit 6.This unit comprises load-relay, EMC filtering device and sample circuit；
Fig. 2-4 show traditional energy storage bi-directional inverter each unit voltage waveform, and Vbat is continuous input cell voltage,
After overpower convertor unit 2 and filter unit 3, voltage is VL0-N0, its voltage is AC sine wave voltage, and its amplitude is decided by
Vbat, then after isolating transformer 4, the voltage in output capacitance 5 is VL-N, VL0-N0With VL-NRatio be isolation transformation
The no-load voltage ratio of device 4.
Such scheme is traditional energy storage bi-directional inverter scheme, and it can accomplish electrical isolation, it is possible to is applied to all kinds of
Energy storage, UPS；AC-to DC, the conversion of direct current to exchange can be realized.Owing to structure comparison is single, the application of this system exists
Unicity, uses also the most dumb, there is also some leaks used:
1) the multifarious country of electrical network, such as Japan's electrical network, there is 110V, 220V both, the electricity consumption of use in single-phase voltage
Equipment there is also both, the more such as U.S., and single-phase electrical network exists 120Vac, 240Vac both, if using above-mentioned tradition
Energy storage inverter equipment, as it is shown in figure 1, its grid interface unit 6 and loading interfaces unit 7, its output voltage or be
110Vac, or output 220Vac, cannot meet the demand of client simultaneously, the most both can effectively access electrical network, also can be simultaneously
Meet client 110V (or 120V), the demand of 220V (or 240) voltage loads；
2) energy-storage system at general family, as Fig. 1 uses traditional energy storage bi-directional inverter, its continuous input cell more than 1
For accumulator, it is used in the system of family, and its voltage is the most relatively low, mostly is the system of below 50Vdc, and power frequency isolation scheme knot
It is in the majority that the structure generally one-level change of current adds one-level isolation boosting, the system output 220Vac if using traditional scheme, less than 50Vdc
Voltage, the step-up ratio of isolating transformer 4 described in scheme can be very big, and its technology difficulty realized is very big, and cost is high, volume
Greatly, electromagnetic interference is also big, and relative efficiency is the lowest.As a example by the direct current of 48V inputs, after overpower convertor unit 2, passing through
Voltage after filter unit 3 is generally (48V/1.414) * 0.9=30Vac, be 220Vac's by the boost in voltage of 30Vac
Voltage is connected to the grid or bringing onto load, it is contemplated that the voltage range of continuous input cell 1, it is therefore desirable to the step-up ratio of more than 8 times
Isolating transformer 4, simultaneously as the electric current of isolating transformer 4 front end is too big, its design difficulty, manufacturing process, EMC disturbs
And the design of filter unit 3 all can increase difficulty；
3) tradition energy storage bi-directional inverter is difficult to accomplish greater power in low-pressure system, typically accomplishes greater power needs
And machine realizes, and machine needs to increase a lot of periphery circuit, and reliability reduces, and can make for carrying out a lot of fiber crops to user simultaneously
Tired.
In sum, tradition power frequency bi-directional inverter is applied and be there is a lot of limitation in energy-storage system, will realize these merits
Can, need to make to improve and optimizate.
Summary of the invention
Problem to be solved by this invention be to provide a can meet simultaneously 110Vac and 220Vac electrical network and load need
The multifunctional intellectual bi-directional inverter asked, solves power frequency bi-directional inverter step-up ratio in low pressure energy-storage system excessive, merit simultaneously
The problem that rate promotes more difficulty.
The technical scheme realizing the object of the invention is: a kind of multifunctional intellectual bi-directional inverter, multifunctional intellectual is two-way to be changed
Stream device includes continuous input cell, the first power conversion unit, the second power conversion unit, the first filter unit, the second filtering
Unit, isolation energy-storage units, load outputs mouth and grid interface unit, the first power conversion unit and the conversion of the second power are single
Unit be all connected with continuous input cell, the first filter unit and the first power conversion unit are connected, the second filter unit and
Second power conversion unit is connected, and isolation energy-storage units is used for carrying out electrical isolation, regulation voltage and storing output energy, the
One filter unit and the second filter unit all with isolation energy-storage units be connected, load outputs mouth and grid interface unit all with
Isolation energy-storage units is connected.
As the prioritization scheme of the present invention, isolation energy-storage units include the first isolating transformer, the first output capacitance, second
Isolating transformer and the second output capacitance, the first isolating transformer and the first filter unit are connected, the first output capacitance and the
Two outfans of the secondary of one isolating transformer connect, and the second isolating transformer and the second filter unit are connected, and second is defeated
Two outfans of the secondary going out electric capacity and the second isolating transformer connect, and the first output capacitance and the second output capacitance are all with negative
Load output port is connected, and the first output capacitance is all connected with grid interface unit with the second output capacitance.
As the prioritization scheme of the present invention, isolation energy-storage units includes the 3rd isolating transformer and the 3rd output capacitance, the
One former limit input of three isolating transformers and the first filter unit are connected, and another former limit of the 3rd isolating transformer is defeated
Entering end to be connected with the second filter unit, the 3rd output capacitance is connected with two outfans of the secondary of the 3rd isolating transformer,
3rd output capacitance is connected with load outputs mouth, and the 3rd output capacitance is connected with grid interface unit.
As the prioritization scheme of the present invention, multifunctional intellectual bi-directional inverter also include the 3rd power conversion unit, the 3rd
Filter unit, isolation energy-storage units include the 4th isolating transformer, the 4th output capacitance, the 5th isolating transformer, the 5th output
Electric capacity, the 6th isolating transformer and the 6th output capacitance, the 3rd power conversion unit is connected with continuous input cell, the 3rd filter
Ripple unit and the 3rd power conversion unit are connected, and the 4th isolating transformer and the first filter unit are connected, the 4th output electricity
Holding and be connected with two outfans of the secondary of the 4th isolating transformer, the 5th isolating transformer and the second filter unit are connected,
5th output capacitance is connected with two outfans of the secondary of the 5th isolating transformer, and the 6th isolating transformer and the 3rd filtering are single
Unit is connected, and the 6th output capacitance is connected with two outfans of the secondary of the 6th isolating transformer, the 4th output capacitance, the 5th
Output capacitance is all connected with load outputs mouth with the 6th output capacitance, the 4th output capacitance, the 5th output capacitance and the 6th
Output capacitance is all connected with grid interface unit.
The present invention has a positive effect: (1) present invention can meet the most simultaneously client 110V load and
220V load and the requirement of grid interface；If system work, user just can load port obtain two independent
110Vac off-network voltage and the off-network voltage of a 220Vac, can meet 110Vac and the 220Vac electrical network of client simultaneously
Demand, in like manner, as long as user puts forward voltage requirements, can combine out by this mode, it is also possible to three so
Module realize three-phase system；
(2) two 110Vac voltages output of the present invention, actual control signal is one group, only by first group just partly
Drive the negative half period being used as second group to drive in week, so can be obtained by two individual event 110Vac voltages of phase place mutual deviation 180 °,
Through N line design altogether, the most just by the alternating voltage of two live wire output 220Vac, and this kind of mode controls simple and reliable；
(3) two of the present invention independent (controlling mutual deviation 180 °) power conversion modules are defeated through respective booster transformer
Voltage Series after going out so that relatively low cell voltage can obtain higher line voltage (or load voltage), this
Plant the system connecting control mode more traditional and can double step-up ratio；
(4) for isolating transformer is more traditional, step-up ratio reduces by one times, its volume, efficiency, EMC interference, manufacturing process
It is obtained for simplification；
(5) the continuous input cell supply voltage of the present invention is lower, uses this scheme to be easier to realize power frequency isolation, control
System is simple.
Accompanying drawing explanation
It is clearly understood to make present disclosure be easier to, below according to specific embodiment and combine accompanying drawing, right
The present invention is described in further detail:
Fig. 1 is traditional energy storage bi-directional inverter circuit diagram；
Fig. 2 is the oscillogram of the continuous input cell of traditional energy storage bi-directional inverter；
Fig. 3 is the output waveform figure of the filter unit of traditional energy storage bi-directional inverter；
Fig. 4 is the output waveform figure of the isolating transformer of traditional energy storage bi-directional inverter；
Fig. 5 is the circuit diagram of the embodiment of the present invention 1；
Fig. 6 is the direct current input waveform figure of embodiment 1；
Fig. 7 is the output waveform figure of the first filter unit of embodiment 1；
Fig. 8 is the output waveform figure of the second filter unit of embodiment 1；
Fig. 9 is the output waveform figure of the load outputs mouth of embodiment 1；
Figure 10 is the direct current input waveform figure of embodiment 2；
Figure 11 is the oscillogram of the first output capacitance of embodiment 2；
Figure 12 is the input waveform figure of the 3rd isolating transformer of embodiment 2；
Figure 13 is the oscillogram of the second output capacitance of embodiment 2；
Figure 14 is the output waveform figure of the load outputs mouth of embodiment 2；
Figure 15 is the circuit diagram of embodiment 3.
Wherein: 1, continuous input cell, 2, power convertor unit, 3, filter unit, 4, isolating transformer, 5, output electricity
Hold, 6, grid interface unit, 7, loading interfaces unit, 10, continuous input cell, the 11, first power conversion unit, 12, second
Power conversion unit, the 13, first filter unit, the 14, second filter unit, 16, load outputs mouth, 17, grid interface unit,
151, the first isolating transformer, the 152, first output capacitance, the 153, second isolating transformer, the 154, second output capacitance, 155,
3rd isolating transformer, the 156, the 3rd output capacitance, the 18, the 3rd power conversion unit, the 19, the 3rd filter unit, the 157, the 4th
Isolating transformer, the 158, the 4th output capacitance, the 159, the 5th isolating transformer, the 1510, the 5th output capacitance, the 1511, the 6th every
From transformator, the 1512, the 6th output capacitance.
Detailed description of the invention
The invention discloses a kind of multifunctional intellectual bi-directional inverter, change including continuous input cell the 10, first power
Unit the 11, second power conversion unit the 12, first filter unit the 13, second filter unit 14, isolation energy-storage units, load output
Port 16 and grid interface unit 17, the first power conversion unit 11 and the second power conversion unit 12 are all and continuous input cell
10 are connected, and the first filter unit 13 is connected with the first power conversion unit 11, and the second filter unit 14 turns with the second power
Changing unit 12 to be connected, isolation energy-storage units is used for carrying out electrical isolation, regulation voltage and storing output energy, and the first filtering is single
Unit 13 with the second filter unit 14 all with isolate energy-storage units be connected, load outputs mouth 16 and grid interface unit 17 all with
Isolation energy-storage units is connected.
Wherein, the first power conversion unit 11 and the second power conversion unit 12 are all connected on continuous input cell 10,
First power conversion unit 11 and the second power conversion unit 12 differ from 180 ° in phase place, the first power conversion unit 11 output
The sine wave that sinusoidal wave sine wave after the first filter unit 13 and the second power conversion unit 12 export is through the second merit
Sine voltage phase place mutual deviation 180 ° after rate converting unit 12.
Embodiment 1:
As it is shown in figure 5, isolation energy-storage units includes that first isolating transformer the 151, first output capacitance 152, second is isolated
Transformator 153 and the second output capacitance 154, the first isolating transformer 151 is connected with the first filter unit 13, the first output electricity
Holding 152 to be connected with two outfans of the secondary of the first isolating transformer 151, the second isolating transformer 153 and the second filtering are single
Unit 14 is connected, and the second output capacitance 154 is connected with two outfans of the secondary of the second isolating transformer 153, the first output
Electric capacity 152 is all connected with load outputs mouth 16 with the second output capacitance 154, the first output capacitance 152 and the second output electricity
Hold 154 to be all connected with grid interface unit 17.
Continuous input cell 10 can be photovoltaic input, can also input for accumulator battery, and accumulator battery can be plumbic acid
Set of cells can also be Li-ion batteries piles, and for small-sized household energy-storage system, its input voltage is generally below 100V, and majority is adopted
Use 48V system voltage；The bridge type that first power conversion unit 11 and the second power conversion unit 12 are constituted for power switch pipe changes
Flow structure, its input is the unidirectional current Vbat of continuous input cell, and its output then can obtain the chopped waveform of sine wave modulation,
The driving signal of two the first independent power conversion units 11 and the second power conversion unit 12 is same group of signal phase phase
Differing from 180 ° of modulation to form, it exports chopped waveform phase 180 °；First filter unit 13 and the second filter unit 14 are by two
Inductance, an electric capacity composition, its structure is not limited to this LLC (π) type structure, it is also possible to be LCL (T-type structure) or letter
Single LC (inductance) structure, the chopped waveform of the first power conversion unit 11 and the output of the second power conversion unit 12 is passed through
After first filter unit 13 and the second filter unit 14, being i.e. converted into the sine waveform of standard, its virtual value is the largest of about
For (48V/1.414) * 0.9=30Vac, the first filter unit 13 and the voltage waveform phase of the second filter unit 14 output
180 °, as shown in Fig. 5 dotted line sinusoidal voltage waveform；This sine wave output becomes through the first isolating transformer 151 and the second isolation
After depressor 153 isolation boosting, obtain the standard sine wave of two groups of 110Vac, these standard sine waveform phase place also mutual deviation 180 °, this
180 ° of sine waves of two groups of mutual deviations are connected in series in output capacitance, i.e. can get the 110Vac sinewave output and of two groups of independences
Group 220Vac sinewave output, can realize problem solved by the invention；Wherein Vac represents that alternating voltage, Vdc represent direct current
Voltage.
The 110Vac output of two-way independence, the load capacity on each road depends on the most independent power conversion unit and filter
Ripple unit and isolating transformer, whole during, isolating transformer step-up ratio is 110/30, more traditional 220/30 reduce by one
Times；Two independent 110Vac load general powers share 220Vac general power, say, that carried a part of 110Vac to load,
So 220Vac load is then equal to the twice of the 110Vac load residual capacity on band Zai Na mono-tunnel；
Each several part output waveform and phase place are as shown in dotted line and Fig. 6-9 waveform in Fig. 5, it is possible to clearly reduce and rise a buckling
Transformer voltage ratio, is advantageously applied in low pressure energy-storage system, and meanwhile, the output voltage waveforms of its synthesis, so that client has
More flexible selection.
Embodiment 2:
As shown in Figure 10, isolation energy-storage units includes the 3rd isolating transformer 155 and the 3rd output capacitance 156, the 3rd every
A former limit input and the first filter unit 13 from transformator 155 are connected, and another of the 3rd isolating transformer 155 is former
Limit input and the second filter unit 14 are connected, two of the secondary of the 3rd output capacitance 156 and the 3rd isolating transformer 155
Outfan connects, and the 3rd output capacitance 156 is connected with load outputs mouth 16, the 3rd output capacitance 156 and grid interface list
Unit 17 is connected.
Wherein, the difference of Figure 10 with Fig. 5 is that two the first independent power conversion units 11 and the second power turn
Change unit 12 output mutual deviation 180 ° chopped waveform after the first filter unit 13 and the second filter unit 14, i.e. enter
Row be connected in series, the sine waveform herein obtained is (48/1.414) * 0.9*2=60Vac to the maximum, only with one the 3rd every
From transformator 155, its step-up ratio is 220/60, the same Fig. 5 of step-up ratio, but a set of boosting isolating transformer can be used just can to do
Directly turn 220Vac alternating voltage to low-voltage direct-current system, may be equally applicable for low dc voltage energy-storage system.
First power conversion unit 11 and the second power conversion unit 12 use same group to drive signal through 180 ° equally
Phase contrast is modulated, and it is output as the chopped waveform of Sine Modulated of mutual deviation 180 °；Went here and there before the 3rd isolating transformer 155
Connection connects, and the 3rd isolating transformer 155 output can only obtain the alternating voltage of a road 220Vac and uses to load or electrical network, but
This kind of structure can effectively solve the problem that low-voltage direct-current system (as less than 48Vdc cell voltage) inversion is to 220Vac or higher voltage
Electrical network or the load of grade use；Can effectively reduce transformer voltage ratio, reduce the electric current of transformer primary side, reduce system
EMC disturbs；Can effectively promote the efficiency of transformator, the processing technique of transformator also simplifies.
As illustrated in figs. 11-14, the voltage Vbat of continuous input cell 10 changes each several part output waveform through the first power
Unit 11 and the second power conversion unit 12, then obtain after the first filter unit 13 and the second filter unit 14 two groups mutual
Differing from the alternating voltage that maximum virtual value is 30V of 180 °, obtaining maximum virtual value after output series connection is the alternating current of 60Vac
Pressure (shown in dotted line), then after the 3rd isolating transformer 155 boosting, obtain the output AC voltage of 220Vac for load and also
Net uses.
Embodiment 3:
As shown in figure 15, multifunctional intellectual bi-directional inverter also includes the 3rd power conversion unit the 18, the 3rd filter unit
19, isolation energy-storage units includes that the 4th isolating transformer the 157, the 4th output capacitance the 158, the 5th isolating transformer the 159, the 5th is defeated
Going out electric capacity the 1510, the 6th isolating transformer 1511 and the 6th output capacitance 1512, the 3rd power conversion unit 18 inputs with direct current
Unit 10 is connected, and the 3rd filter unit 19 is connected with the 3rd power conversion unit 18, the 4th isolating transformer 157 and first
Filter unit 13 is connected, and the 4th output capacitance 158 is connected with two outfans of the secondary of the 4th isolating transformer 157, the
Five isolating transformers 159 are connected with the second filter unit 14, the 5th output capacitance 1510 and the pair of the 5th isolating transformer 159
Two outfans on limit connect, and the 6th isolating transformer 1511 is connected with the 3rd filter unit 19, the 6th output capacitance 1512
It is connected with two outfans of the secondary of the 6th isolating transformer 1511, the 4th output capacitance the 158, the 5th output capacitance 1510 and
6th output capacitance 1512 is all connected with load outputs mouth 16, the 4th output capacitance 158, the 5th output capacitance 1510 and
Six output capacitances 1512 are all connected with grid interface unit 17.
Wherein, the power change of current and filtering isolated location A include the first filter unit 13, the 4th isolating transformer 157 and the
Four output capacitances 158, the power change of current and filtering isolated location B include the second filter unit 14, the 5th isolating transformer 159 and the
Five output capacitances 1510, the power change of current and filtering isolated location C include the 3rd filter unit the 19, the 6th isolating transformer 1511 and
6th output capacitance 1512, the power change of current and filtering isolated location A are as the main frame of system, and its output obtains in three-phase system
Voltage A phase, meanwhile, offsets 120 ° as power backward using the drive control signal phase place of the power change of current and filtering isolated location A
The change of current and the drive control signal of filtering isolated location B；The power change of current and filtering isolated location B output obtain in three-phase system
Voltage B phase；The drive control signal phase place of the power change of current and filtering isolated location A offsets 240 ° backward as the power change of current and filter
The drive control signal of ripple isolated location C, the output of the power change of current and filtering isolated location C obtains the voltage C in three-phase system
Phase；Three-phase voltage L1, L2, L3, N is i.e. can get at load outputs mouth 16 and grid interface unit 17.
Three independent single-phase voltage L1-N, L2-N, L3-N and one symmetrical three can be obtained at load delivery outlet
Phase voltage L1/L2/L3-N；Can effectively meet that client is single-phase and the demand of threephase load；
Figure 15 can make asymmetric structure, and namely the power of three-phase can be asymmetric, such as a 10KW
Three-phase system, A phase can be with design power as 6KW, and B phase and C phase design power are respectively 2KW, then, one can be obtained solely
The single-phase voltage L1-N of vertical 4KW, and the three line voltage L1/L2/L3-N of a symmetrical 6KW；Greatly optimize three-phase system
The output of system.
Particular embodiments described above, has been carried out the purpose of the present invention, technical scheme and beneficial effect the most in detail
Describe in detail bright, be it should be understood that the specific embodiment that the foregoing is only the present invention, be not limited to the present invention, all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, should be included in the guarantor of the present invention
Within the scope of protecting.
Claims (4)
1. a multifunctional intellectual bi-directional inverter, it is characterised in that: described multifunctional intellectual bi-directional inverter includes that direct current is defeated
Enter unit (10), the first power conversion unit (11), the second power conversion unit (12), the first filter unit (13), the second filter
Ripple unit (14), isolation energy-storage units, load outputs mouth (16) and grid interface unit (17), the first described power conversion
Unit (11) is all connected with continuous input cell (10) with the second power conversion unit (12), the first described filter unit
(13) it is connected with the first power conversion unit (11), described the second filter unit (14) and the second power conversion unit (12)
Being connected, described isolation energy-storage units is used for carrying out electrical isolation, regulation voltage and storing output energy, the first described filter
Ripple unit (13) is all connected with isolation energy-storage units with the second filter unit (14), described load outputs mouth (16) and electricity
Network interface unit (17) is all connected with isolation energy-storage units.
A kind of multifunctional intellectual bi-directional inverter the most according to claim 1, it is characterised in that: described isolation energy storage list
Unit includes the first isolating transformer (151), the first output capacitance (152), the second isolating transformer (153) and the second output capacitance
(154), described the first isolating transformer (151) is connected with the first filter unit (13), the first described output capacitance
(152) two outfans with the secondary of the first isolating transformer (151) are connected, described the second isolating transformer (153) with
Second filter unit (14) is connected, the two of the secondary of described the second output capacitance (154) and the second isolating transformer (153)
Individual outfan connect, described the first output capacitance (152) and the second output capacitance (154) all with load outputs mouth (16) phase
Connecting, described the first output capacitance (152) is all connected with grid interface unit (17) with the second output capacitance (154).
A kind of multifunctional intellectual bi-directional inverter the most according to claim 1, it is characterised in that: described isolation energy storage list
Unit includes the 3rd isolating transformer (155) and the 3rd output capacitance (156), and a former limit of the 3rd isolating transformer (155) is defeated
Enter end to be connected with the first filter unit (13), another former limit input of the 3rd isolating transformer (155) and the second filtering
Unit (14) is connected, two outfans of the secondary of the 3rd described output capacitance (156) and the 3rd isolating transformer (155)
Connecting, the 3rd described output capacitance (156) is connected with load outputs mouth (16), the 3rd described output capacitance (156)
It is connected with grid interface unit (17).
A kind of multifunctional intellectual bi-directional inverter the most according to claim 1, it is characterised in that: described multifunctional intellectual is double
Also include that to inverter the 3rd power conversion unit (18), the 3rd filter unit (19), described isolation energy-storage units include
Four isolating transformers (157), the 4th output capacitance (158), the 5th isolating transformer (159), the 5th output capacitance (1510),
Six isolating transformers (1511) and the 6th output capacitance (1512), the 3rd described power conversion unit (18) is single with direct current input
Unit (10) be connected, the 3rd described filter unit (19) is connected with the 3rd power conversion unit (18), described the 4th every
It is connected with the first filter unit (13) from transformator (157), the 4th described output capacitance (158) and the 4th isolating transformer
(157) two outfans of secondary connect, and the 5th described isolating transformer (159) is connected with the second filter unit (14)
Connecing, the 5th described output capacitance (1510) is connected with two outfans of the secondary of the 5th isolating transformer (159), described
6th isolating transformer (1511) is connected with the 3rd filter unit (19), the 6th described output capacitance (1512) with the 6th every
Two outfans from the secondary of transformator (1511) connect, described the 4th output capacitance (158), the 5th output capacitance
(1510) all it is connected with load outputs mouth (16) with the 6th output capacitance (1512), described the 4th output capacitance (158),
5th output capacitance (1510) is all connected with grid interface unit (17) with the 6th output capacitance (1512).
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| CN111610387A (en) * | 2020-03-26 | 2020-09-01 | 深圳市鑫翊新能源科技有限公司 | Electronic load device and electronic load circuit |
| TWI748347B (en) * | 2020-02-15 | 2021-12-01 | 國立清華大學 | Control method for single-phase inverter and device thereof |
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| CN106230297B (en) | 2018-09-11 |
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