CN106230297B - A kind of multifunctional intellectual bi-directional inverter - Google Patents
A kind of multifunctional intellectual bi-directional inverter Download PDFInfo
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- CN106230297B CN106230297B CN201610790262.1A CN201610790262A CN106230297B CN 106230297 B CN106230297 B CN 106230297B CN 201610790262 A CN201610790262 A CN 201610790262A CN 106230297 B CN106230297 B CN 106230297B
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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 fields, more particularly 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 are for carrying out electrical isolation, adjusting voltage and storage output energy, first filter unit and the second filter unit with energy-storage units be isolated be connected, load outputs mouth and grid interface unit with energy-storage units be isolated be connected.The present invention can meet the multifunctional intellectual bi-directional inverter of 110Vac and 220Vac power grids and loading demand simultaneously, while solve that power frequency bi-directional inverter step-up ratio in low pressure energy-storage system is excessive, the more difficult problem of power ascension.
Description
Technical field
The present invention relates to electronic circuit field more particularly to a kind of multifunctional intellectual bi-directional inverters.
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 shown in Figure 1, main is all by continuous input cell 1, power change of current list
Member 2, filter unit 3, isolating transformer 4, output capacitance 5, grid interface unit 6, loading interfaces unit 7 form；Wherein direct current
Input unit 1 includes photovoltaic battery panel input interface, also includes energy storage battery input interface and sample circuit, power change of current list
Member 2 is made of four switching transistors, and major function is to carry out the two-way change of current function of DC-AC, if direct current to exchange
The change of current, then energy transmitted from continuous input cell 1 to rear class；If the alternating-current/direct-current change of current, then inputted from rear class to direct current single
Member 1 is transmitted；In three-phase system, power convertor unit 2 is then made of six switching transistors, and switching transistor is not limited to a certain
Kind transistor, as long as the high frequency switching elements as switch motion all arrange herein；Filter unit 3 is by two inductance and a capacitance
Composition, structure are not limited to this LLC (π) type structure, can also be LCL (T-type structure) or a simple LC (electricity
Sense) structure, it is mainly used as output filtering purposes, 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 adjusting voltage, and 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 output end of isolating transformer 4, also as output energy storage device；Power grid
Interface unit 6 includes and network relay, EMC filter circuit, sample circuit etc., being connected to for unit control desire power grid are disconnected
It opens, there is software control to be intended to power grid and carry out energy exchange；Loading interfaces unit 7 is primarily used to powering load, energy source
Including continuous input cell 1 and grid interface unit 6.The unit includes load-relay, EMC filtering devices and sample circuit；
Fig. 2-4 show traditional energy storage bi-directional inverter each unit voltage waveform, and Vbat is continuous input cell voltage,
Voltage is V after overpower convertor unit 2 and filter unit 3L0-N0, voltage is AC sine wave voltage, and amplitude is decided by
Vbat, after isolating transformer 4, the voltage in output capacitance 5 is VL-N, VL0-N0With VL-NRatio be isolated transformation
The no-load voltage ratio of device 4.
Said program is traditional energy storage bi-directional inverter scheme, can accomplish electrical isolation, can be applied to all kinds of
Energy storage, UPS；The conversion of AC-to DC, direct current to exchange may be implemented.Since structure is relatively simple, the system is using presence
Unicity, using and it is dumb, there is also the loopholes in some uses：
1) the multifarious country of power grid, such as Japanese power grid, single-phase voltage there are 110V, 220V both, the electricity consumption used
There is also both for equipment, then such as U.S., single-phase power grid there are 120Vac, 240Vac both, if using above-mentioned tradition
Energy storage transverter equipment, as shown in Figure 1, its grid interface unit 6 and loading interfaces unit 7, or output voltage is
110Vac or output 220Vac, cannot meet the needs of client, i.e., both can effectively access power grid simultaneously, also can be simultaneously
Meet the demand of client 110V (either 120V) 220V (or 240) voltage loads；
2) energy-storage system at general family, as Fig. 1 uses traditional energy storage bi-directional inverter, continuous input cell more than 1
For accumulator, it is used in the system of family, voltage is generally relatively low, mostly 50Vdc systems below, and power frequency isolation scheme knot
Structure is generally the level-one change of current and adds level-one isolation boosting in the majority, if using traditional scheme, is less than the system output 220Vac of 50Vdc
The step-up ratio of voltage, isolating transformer 4 described in scheme can be very big, and the technology difficulty realized is very big and of high cost, volume
Greatly, electromagnetic interference is also big, and relative efficiency is also low.By taking the input of the direct current of 48V as an example, after overpower convertor unit 2, passing through
Voltage after filter unit 3 is generally (48V/1.414) * 0.9=30Vac, is 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 8 times or more of step-up ratio
Isolating transformer 4, simultaneously as the electric current of 4 front end of isolating transformer is too big, design difficulty, manufacturing process, EMC interference
And the design of filter unit 3 can all increase difficulty；
3) traditional energy storage bi-directional inverter is difficult to accomplish more high-power in low-pressure system, generally accomplishes more high-power needs
And machine is realized, and machine needs to increase many periphery circuits, reliability reduces, while can carry out many fiber crops to user's use
It is tired.
In conclusion traditional power frequency bi-directional inverter is applied has many limitations in energy-storage system, these work(are realized
Can, it needs to make and improves and optimizates.
Invention content
Problem to be solved by this invention be to provide it is a can meet simultaneously 110Vac and 220Vac power grids and load need
The multifunctional intellectual bi-directional inverter asked, while it is excessive to solve power frequency bi-directional inverter step-up ratio in low pressure energy-storage system, work(
Rate promotes more difficult problem.
Realizing the technical solution of 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
Member be connected with continuous input cell, the first filter unit is connected with the first power conversion unit, the second filter unit and
Second power conversion unit is connected, and isolation energy-storage units export energy for carrying out electrical isolation, adjusting voltage and store, the
One filter unit and the second filter unit with energy-storage units be isolated be connected, load outputs mouth and grid interface unit with
Isolation energy-storage units are 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 are connected with the first filter unit, the first output capacitance and the
Two output ends on the secondary side of one isolating transformer connect, and the second isolating transformer is connected with the second filter unit, and second is defeated
Go out capacitance to connect with two output ends on the secondary side of the second isolating transformer, the first output capacitance and the second output capacitance with it is negative
It carries output port to be connected, the first output capacitance and the second output capacitance are connected with grid interface unit.
As the prioritization scheme of the present invention, isolation energy-storage units include third isolating transformer and third output capacitance, the
One primary side input terminal of three isolating transformers is connected with the first filter unit, another primary side of third isolating transformer is defeated
Entering end with the second filter unit to be connected, third output capacitance is connect with two output ends on the secondary side of third isolating transformer,
Third output capacitance is connected with load outputs mouth, and third output capacitance is connected with grid interface unit.
As the prioritization scheme of the present invention, multifunctional intellectual bi-directional inverter further includes third power conversion unit, third
Filter unit, isolation energy-storage units include the 4th isolating transformer, the 4th output capacitance, the 5th isolating transformer, the 5th output
Capacitance, the 6th isolating transformer and the 6th output capacitance, third power conversion unit are connected with continuous input cell, third filter
Wave unit is connected with third power conversion unit, and the 4th isolating transformer is connected with the first filter unit, the 4th output electricity
Appearance is connect with two output ends on the secondary side of the 4th isolating transformer, and the 5th isolating transformer is connected with the second filter unit,
5th output capacitance is connect with two output ends on the secondary side of the 5th isolating transformer, and the 6th isolating transformer and third filtering are single
Member is connected, and the 6th output capacitance is connect with two output ends on the secondary side of the 6th isolating transformer, the 4th output capacitance, the 5th
Output capacitance and the 6th output capacitance are connected with load outputs mouth, the 4th output capacitance, the 5th output capacitance and the 6th
Output capacitance is connected with grid interface unit.
The present invention has the effect of positive：(1) it is of the invention can easily meet simultaneously client 110V loads and
220V is loaded and the requirement of grid interface；As long as system work, user can load port obtain two it is independent
The off-network voltage of 110Vac off-networks voltage and a 220Vac can meet 110Vac the and 220Vac power grids of client simultaneously
Demand as long as user puts forward voltage requirements, can be similarly combined into come can also be with three in this way by this mode
Module realize three-phase system；
(2) two 110Vac voltage outputs of the invention, the practical signal that controls is one group, only by just the half of first group
Week driving drives as second group of negative half period, can be obtained by two individual event 110Vac voltages of 180 ° of phase mutual deviation in this way,
Designed by total N lines, also just by the alternating voltage of two firewires output 220Vac, and such mode control it is simple and reliable；
(3) of the invention two independent (180 ° of mutual deviation of control) power conversion modules are defeated by respective step-up transformer
Voltage Series after going out so that lower cell voltage can obtain higher network voltage (or load voltage), this
The more traditional system of kind connection control mode can double step-up ratio；
(4) isolating transformer it is more traditional for, step-up ratio reduce by one times, volume, efficiency, EMC interference, manufacturing process
It is obtained for simplification；
(5) continuous input cell supply voltage of the invention is lower, is easier to realize power frequency isolation, control using this scheme
System is simple.
Description of the drawings
In order that the present invention can be more clearly and readily understood, right below according to specific embodiment and in conjunction with attached drawing
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 third 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,
Third isolating transformer, the 156, third output capacitance, 18, third power conversion unit, 19, third 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 transformer, the 1512, the 6th output capacitance.
Specific implementation mode
The invention discloses a kind of multifunctional intellectual bi-directional inverters, including continuous input cell 10, the first power to convert
Unit 11, the second power conversion unit 12, the first filter unit 13, the 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 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 and the second power turn
It changes unit 12 to be connected, for isolation energy-storage units for carrying out electrical isolation, adjusting voltage and storing output energy, the first filtering is single
Member 13 and the second filter unit 14 with energy-storage units be isolated be connected, load outputs mouth 16 and grid interface unit 17 with
Isolation energy-storage units are 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 poor 180 ° in phase, the first power conversion unit 11 output
The sine wave of sine wave and second power conversion unit 12 output of the sine wave after the first filter unit 13 passes through the second work(
180 ° of sine voltage phase mutual deviation after rate converting unit 12.
Embodiment 1：
As shown in figure 5, isolation energy-storage units include the first isolating transformer 151, the isolation of the first output capacitance 152, second
Transformer 153 and the second output capacitance 154, the first isolating transformer 151 are connected with the first filter unit 13, the first output electricity
Hold 152 to connect with two output ends on the secondary side of the first isolating transformer 151, the filtering of the second isolating transformer 153 and second is single
Member 14 is connected, and the second output capacitance 154 is connect with two output ends on the secondary side of the second isolating transformer 153, the first output
Capacitance 152 and the second output capacitance 154 are connected with load outputs mouth 16, the first output capacitance 152 and second output electricity
Hold 154 to be connected with grid interface unit 17.
Continuous input cell 10 can be photovoltaic input or the input of accumulator group, and accumulator group can be plumbic acid
Battery pack may be Li-ion batteries piles, and for small-sized household energy-storage system, input voltage is generally below 100V, and majority is adopted
With 48V system voltages；First power conversion unit 11 and the second power conversion unit 12 are that the bridge type that power switch tube is constituted changes
Flow structure, input are the direct current Vbat of continuous input cell, and output can then obtain the chopped waveform of sine wave modulation,
The drive signal of two 11 and second power conversion units 12 of independent first power conversion unit is same group of signal phase phase
Poor 180 ° are modulated, and output chopped waveform phase differs 180 °；First filter unit 13 and the second filter unit 14 are by two
Inductance, a capacitance composition, structure is not limited to this LLC (π) type structure, can also be LCL (T-type structure) or letter
The chopped waveform of single LC (inductance) structure, 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, that is, it is converted into the sine waveform of standard, virtual value is the largest of about
For (48V/1.414) * 0.9=30Vac, the voltage waveform phase difference of the first filter unit 13 and the output of the second filter unit 14
180 °, as shown in Fig. 5 dotted line sinusoidal voltage waveforms；The output sine wave becomes by the isolation of the first isolating transformer 151 and second
After 153 isolation boosting of depressor, the standard sine wave of two groups of 110Vac is obtained, the standard sine waveform phase also 180 ° of mutual deviation, this
Two groups of mutual deviations, 180 ° of sine waves are connected in series in output capacitance, you can obtain two groups of independent 110Vac sinewave outputs and one
Group 220Vac sinewave outputs, you can realize problem solved by the invention；Wherein Vac indicates that alternating voltage, Vdc indicate direct current
Voltage.
The independent 110Vac outputs of two-way, separate power conversion unit and filter are depended on per load capacity all the way
Wave unit and isolating transformer, in whole process, isolating transformer step-up ratio is 110/30, more traditional 220/30 to reduce by one
Times；Two independent 110Vac load general powers share 220Vac general powers, that is to say, that it is loaded with a part of 110Vac,
So 220Vac loads are then equal to band and carry that 110Vac load twice of residual capacity all the way；
In each section output waveform and phase such as Fig. 5 shown in dotted line and Fig. 6-9 waveforms, it can clearly reduce boosting and become
Transformer voltage ratio is advantageously applied in low pressure energy-storage system, meanwhile, the output voltage waveforms of synthesis can make client have
More flexible selection.
Embodiment 2：
As shown in Figure 10, isolation energy-storage units include third isolating transformer 155 and third output capacitance 156, third every
A primary side input terminal from transformer 155 is connected with the first filter unit 13, and another of third isolating transformer 155 is former
Side input terminal is connected with the second filter unit 14, two of the secondary side of third output capacitance 156 and third isolating transformer 155
Output end connects, and third output capacitance 156 is connected with load outputs mouth 16, third output capacitance 156 and grid interface list
Member 17 is connected.
Wherein, Figure 10 is the difference from Fig. 5 is that two 11 and second power of independent first power conversion unit turn
The chopped waveform of 180 ° of mutual deviation of output of unit 12 is changed after by the first filter unit 13 and the second filter unit 14, i.e., into
Row be connected in series with, the sine waveform obtained herein is up to (48/1.414) * 0.9*2=60Vac, only with a third every
From transformer 155, step-up ratio 220/60, the same Fig. 5 of step-up ratio, but it a set of boosting isolating transformer may be used can do
Directly turn 220Vac alternating voltages 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 equally pass through 180 ° using same group of drive signal
Phase difference is modulated, and output is the chopped waveform of the Sine Modulated of 180 ° of mutual deviation；It is gone here and there before third isolating transformer 155
Connection connection, third isolating transformer 155 export the alternating voltage that can only obtain 220Vac all the way to load or power grid use, but
This kind of structure can effectively solve the problem that low-voltage direct-current system (as being less than 48Vdc cell voltages) inversion to 220Vac or higher voltage
The power grid of grade or load use；Transformer voltage ratio can be effectively reduced, the electric current of transformer primary side is reduced, reduces system
EMC is interfered；The efficiency of transformer can be effectively promoted, the processing technology of transformer also simplifies.
As illustrated in figs. 11-14, the voltage Vbat of continuous input cell 10 is converted each section output waveform by the first power
Unit 11 and the second power conversion unit 12, it is mutual using obtaining two groups after the first filter unit 13 and the second filter unit 14
Poor 180 ° of maximum virtual value is the alternating voltage of 30V, and the alternating current that maximum virtual value is 60Vac is obtained after output is connected
It presses (shown in dotted line), the output AC voltage of 220Vac is obtained after boosting using third isolating transformer 155 for load and simultaneously
Net uses.
Embodiment 3：
As shown in figure 15, multifunctional intellectual bi-directional inverter further includes third power conversion unit 18, third filter unit
19, isolation energy-storage units are defeated including the 4th isolating transformer 157, the 4th output capacitance 158, the 5th isolating transformer the 159, the 5th
Go out capacitance 1510, the 6th isolating transformer 1511 and the 6th output capacitance 1512, third power conversion unit 18 is inputted with direct current
Unit 10 is connected, and third filter unit 19 is connected with third power conversion unit 18, the 4th isolating transformer 157 and first
Filter unit 13 is connected, and the 4th output capacitance 158 is connect with two output ends on the secondary side of the 4th isolating transformer 157, the
Five isolating transformers 159 are connected with the second filter unit 14, the pair of the 5th output capacitance 1510 and the 5th isolating transformer 159
Two output ends on side connect, and the 6th isolating transformer 1511 is connected with third filter unit 19, the 6th output capacitance 1512
It is connect with two output ends on the secondary side of the 6th isolating transformer 1511, the 4th output capacitance 158,1510 and of the 5th output capacitance
6th output capacitance 1512 is connected with load outputs mouth 16, the 4th output capacitance 158, the 5th output capacitance 1510 and
Six output capacitances 1512 are 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 third filter unit 19,1511 and of the 6th isolating transformer
6th output capacitance 1512, the host of the power change of current and filtering isolated location A as system, output obtain in three-phase system
Voltage A phases, meanwhile, the driving control signal phase of the power change of current and filtering isolated location A is deviated 120 ° backward and is used as power
The driving control signal of the change of current and filtering isolated location B；The power change of current and filtering isolated location B export to obtain in three-phase system
Voltage B phases；The driving control signal phase of the power change of current and filtering isolated location A deviate 240 ° and are used as the power change of current and filter backward
The driving control signal of wave isolated location C, the power change of current and the output of filtering isolated location C obtain the voltage C in three-phase system
Phase；Three-phase voltage L1, L2, L3, N are can be obtained 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 in load delivery outlet
Phase voltage L1/L2/L3-N；Can effectively meet the needs of single-phase client and threephase load；
Figure 15 can make asymmetric structure, that is, the power of three-phase can be asymmetric, such as a 10KW
Three-phase system, A phases can be 6KW with design power, and B phases and C phase design powers are respectively 2KW, it is possible to obtain one solely
The three line voltage L1/L2/L3-N of the single-phase voltage L1-N of vertical 4KW and a symmetrical 6KW；Greatly optimize three-phase system
The output of system.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical solution and advantageous effect
It describes in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the guarantor of the present invention
Within the scope of shield.
Claims (3)
1. a kind of multifunctional intellectual bi-directional inverter, it is characterised in that：The 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
Wave unit (14), isolation energy-storage units, load outputs mouth (16) and grid interface unit (17), first power conversion
Unit (11) and the second power conversion unit (12) are connected with continuous input cell (10), first filter unit
(13) it is connected with the first power conversion unit (11), second filter unit (14) and the second power conversion unit (12)
It is connected, the isolation energy-storage units are for carrying out electrical isolation, adjusting voltage and storage output energy, the described first filter
Wave unit (13) and the second filter unit (14) with energy-storage units be isolated be connected, the load outputs mouth (16) and electricity
Network interface unit (17) with energy-storage units be isolated be connected, the isolation energy-storage units include the first isolating transformer
(151), the first output capacitance (152), the second isolating transformer (153) and the second output capacitance (154), the described first isolation
Transformer (151) is connected with the first filter unit (13), first output capacitance (152) and the first isolating transformer
(151) two output ends on secondary side connect, and second isolating transformer (153) is connected with the second filter unit (14)
It connects, second output capacitance (154) is connect with two output ends on the secondary side of the second isolating transformer (153), described
First output capacitance (152) and the second output capacitance (154) are connected with load outputs mouth (16), the described first output
Capacitance (152) and the second output capacitance (154) are connected with grid interface unit (17).
2. a kind of multifunctional intellectual bi-directional inverter according to claim 1, it is characterised in that：The isolation energy storage list
Member includes third isolating transformer (155) and third output capacitance (156), and a primary side of third isolating transformer (155) is defeated
Enter end with the first filter unit (13) to be connected, another primary side input terminal of third isolating transformer (155) and the second filtering
Unit (14) is connected, two output ends of the third output capacitance (156) and the secondary side of third isolating transformer (155)
Connection, the third output capacitance (156) are connected with load outputs mouth (16), the third output capacitance (156)
It is connected with grid interface unit (17).
3. a kind of multifunctional intellectual bi-directional inverter according to claim 1, it is characterised in that：The multifunctional intellectual is double
To transverter further include third power conversion unit (18), third filter unit (19), the isolation energy-storage units include the
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 third power conversion unit (18) and direct current input are single
First (10) are connected, and the third filter unit (19) is connected with third power conversion unit (18), the described the 4th every
It is connected with the first filter unit (13) from transformer (157), the 4th output capacitance (158) and the 4th isolating transformer
(157) two output ends on secondary side connect, and the 5th isolating transformer (159) is connected with the second filter unit (14)
It connects, the 5th output capacitance (1510) is connect with two output ends on the secondary side of the 5th isolating transformer (159), described
6th isolating transformer (1511) is connected with third filter unit (19), the 6th output capacitance (1512) with the 6th every
Two output ends on the secondary side from transformer (1511) connect, the 4th output capacitance (158), the 5th output capacitance
(1510) it is connected with load outputs mouth (16) with the 6th output capacitance (1512), the 4th output capacitance (158),
5th output capacitance (1510) and the 6th output capacitance (1512) are connected with grid interface unit (17).
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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 |
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| KR20100009034A (en) * | 2008-07-17 | 2010-01-27 | 삼성전기주식회사 | Variable switching frequency type power supply |
| CN202535091U (en) * | 2012-05-22 | 2012-11-14 | 惠州市华威能源科技有限公司 | Photovoltaic micro grid-connected inverter |
| CN104092382A (en) * | 2014-03-28 | 2014-10-08 | 燕山大学 | Three-input-isolation DC/DC converter |
| CN104467017A (en) * | 2014-12-24 | 2015-03-25 | 国家电网公司 | Multiport photovoltaic energy storage hybrid power generation system based on high frequency magnetic coupling |
| CN206060579U (en) * | 2016-08-30 | 2017-03-29 | 江苏耐思特新能源科技有限公司 | A kind of multifunctional intellectual bi-directional inverter |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100009034A (en) * | 2008-07-17 | 2010-01-27 | 삼성전기주식회사 | Variable switching frequency type power supply |
| CN202535091U (en) * | 2012-05-22 | 2012-11-14 | 惠州市华威能源科技有限公司 | Photovoltaic micro grid-connected inverter |
| CN104092382A (en) * | 2014-03-28 | 2014-10-08 | 燕山大学 | Three-input-isolation DC/DC converter |
| CN104467017A (en) * | 2014-12-24 | 2015-03-25 | 国家电网公司 | Multiport photovoltaic energy storage hybrid power generation system based on high frequency magnetic coupling |
| CN206060579U (en) * | 2016-08-30 | 2017-03-29 | 江苏耐思特新能源科技有限公司 | A kind of multifunctional intellectual bi-directional inverter |
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