CN108199599A - External Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency - Google Patents
External Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency Download PDFInfo
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- CN108199599A CN108199599A CN201810020155.XA CN201810020155A CN108199599A CN 108199599 A CN108199599 A CN 108199599A CN 201810020155 A CN201810020155 A CN 201810020155A CN 108199599 A CN108199599 A CN 108199599A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
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- H—ELECTRICITY
- 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
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/3353—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having at least two simultaneously operating switches on the input side, e.g. "double forward" or "double (switched) flyback" converter
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/337—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull 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
- 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
-
- 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
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
-
- 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
- H02M7/493—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 the static converters being arranged for operation in parallel
Abstract
The present invention relates to a kind of external Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency, its circuit structure is to be made of multiple input filters and a shared output high-frequency isolation transformation week wave conversion filter circuit connection altogether the multiple input single output high-frequency inverter circuit of an external Parallel Time-sharing selection four-quadrant power switch, each input terminal of multiple input single output high-frequency inverter circuit couples with the output terminal of each input filter one-to-one correspondence, the output terminal of multiple input single output high-frequency inverter circuit and the input terminal of output high-frequency isolation transformation week wave conversion filter circuit are connected.This inverter has the characteristics that multiple input sources altogether and time sharing power supply, output and input high-frequency isolation, share output high frequency transformation week wave conversion filter circuit, simple circuit, single-stage power conversion, conversion efficiency is high, output voltage ripple is small, application prospect is extensive, the Small And Medium Capacity distributed power supply system to realize a variety of new energy joint power supplies has established key technology.
Description
Technical field
External Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency according to the present invention, belongs to
Technics of Power Electronic Conversion technology.
Background technology
Inverter is to be transformed into a kind of unstable, inferior direct current energy using power semiconductor stablize, is high-quality
AC energy static ac dc converter device, for AC load use or realize exchange it is grid-connected.Export AC load or AC network
The inverter for having low-frequency electric that (including no electrical isolation) or high frequency electrical isolation is isolated between input DC power, is referred to as
Low frequency link, annulus inverter in high frequency.Electrical isolation element has primarily served following effect in inverter：(1) it realizes inverse
Become the electrical isolation between device output and input, improve the security reliability and Electro Magnetic Compatibility of invertor operation；(2) it realizes
Matching between inverter output voltage and input voltage, that is, realize inverter output voltage and be higher than, equal to or less than defeated
Enter the technique effect of voltage, application range has obtained widening significantly；(3) when high frequency transformer or high frequency storage transformer
In more than 20kHz, volume, weight greatly reduce working frequency, and audio noise also eliminates.Therefore, it is sent out with direct current
Motor, accumulator, photovoltaic cell and fuel cell etc. are the secondary transformation of electrical energy occasion of main dc power supply, and inverter has important
Application value.
The new energy such as solar energy, wind energy, tide energy and geothermal energy (also referred to as green energy resource) have cleanliness without any pollution, honest and clean
Valency, it is reliable, abundant the advantages that, thus be with a wide range of applications.Due to traditional fossil energies such as oil, coal and natural gases
(the non-renewable energy) growing tension, environmental pollution is serious, causes global warming and the production of nuclear energy that can generate core again gives up
Reasons, the development and utilization of new energy such as material and pollution environment are increasingly valued by people.Generation of electricity by new energy mainly has light
The types such as volt, wind-force, fuel cell, waterpower, underground heat, there are supply of electric power it is unstable, it is discontinuous, with weather conditions variation etc.
Defect, it is therefore desirable to using the distributed power supply system of a variety of new energy joint power supply.
Traditional new energy distributed power supply system, as shown in Figure 1, 2.The system is typically to use multiple single input direct currents
Photovoltaic cell, fuel cell, wind-driven generator etc. are not required to the new energy equipment of energy stores respectively by one by converter
A Unidirectional direct-current converter carries out transformation of electrical energy and is connected to the direct current mother of public inverter afterwards in parallel or series in output terminal
On line, it is intended to ensure the power supply of various new energy joint and being capable of co-ordination.The distributed generation system realizes multiple defeated
Enter the preferential utilization that source is powered to the load simultaneously with the energy, improve stability and the flexibility of system, but there are two stage powers
Transformation, the defects of power density is low, conversion efficiency is low, of high cost, the practicality, which receives, significantly to be limited.
In order to simplify circuit structure and reduce power conversion series, need new with single stage circuit structure shown in Fig. 3
Type multi input inverter replaces Fig. 1,2 shown traditional multi inputs with DC converter with inverter two-stage cascade circuit structure
Inverter forms novel single-stage new energy distributed power supply system.Single-stage multi input inverter allows a variety of new energy to input,
Property, amplitude and the characteristic of input source can be identical, can also difference it is very big.Novel single-stage new energy distributed power supply system
With circuit structure is succinct, single-stage power conversion, multiple input source is simultaneously in a HF switch period or timesharing is supplied to load
The advantages that electric, at low cost.
Therefore, actively seek a kind of single-stage multi input inverter that a variety of new energy is allowed to combine power supply and its new energy point
Cloth electric power system is extremely urgent, for improving stability and the flexibility of system, realizes that the preferential of new energy utilizes or fill
Divide utilization that will have a very important significance.
Invention content
The invention aims to provide it is a kind of have the power supply of a variety of new energy joint, input DC power altogether, multi input
High-frequency isolation, multiple input power supply one between the external Parallel Time-sharing selecting switch of list output high-frequency inverter circuit, output and input
Time sharing power supply, circuit topology are succinct in a switch periods, share output high-frequency isolation transformation week wave conversion filter circuit, single-stage work(
Rate transformation, conversion efficiency is high, output voltage ripple is small, output Small And Medium Capacity, external in parallel point of the features such as application prospect is extensive
When selecting switch voltage-type single-stage multi input annulus inverter in high frequency.
Technical program of the present invention lies in：A kind of external Parallel Time-sharing selecting switch voltage-type single-stage multi input high frequency link
Inverter is by multiple input filters and a shared output altogether by a multiple input single output high-frequency inverter circuit
The wave conversion filter circuit connection of high-frequency isolation transformation week is formed, each input terminal of multiple input single output high-frequency inverter circuit with it is every
The output terminal of a input filter corresponds connection, and the output terminal of multiple input single output high-frequency inverter circuit and the output are high
The high frequency transformer input terminal of frequency isolation transformation week wave conversion filter circuit is connected, the multiple input single output high-frequency inversion
Circuit is by external multi-channel parallel timesharing selection four-quadrant power switch circuit, bidirectional power flow single-input single-output high-frequency inversion
Circuit sequentially cascades composition, is equivalent to a bidirectional power flow single-input single-output high-frequency inverter circuit at any time, described
External multi-channel parallel timesharing selection four-quadrant power switch circuit per being only made of all the way a four-quadrant power switch and
Each road output terminal connects together, and described output high-frequency isolation transformation week wave conversion filter circuit is by high frequency transformer, cycle
Converter, output filter sequentially cascade composition, and the frequency converter is by multiple bi-directional voltage stress and two-way of bearing
The four-quadrant high frequency power switch of current stress is formed.
The present invention is to form the DC converter of a variety of new energy joint electric power systems of tradition with inverter two-stage cascade
Multi input inverter circuit structure, be configured to the single-stage multi input inverter circuit knot of novel external Parallel Time-sharing selecting switch
Structure, it is proposed that external Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency circuit structure and topological race and
Its energy management control strategy, the i.e. circuit structure are to select four-quadrant power switch by providing a kind of external Parallel Time-sharing
Multiple input single output high-frequency inverter circuit is all by multiple input filters and a shared output high-frequency isolation transformation altogether
Wave conversion filter circuit couples.
The external Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency of the present invention, can will be multiple
Altogether, unstable input direct-current voltage, which is reverse into needed for a load, stablizes good output alternating current, has multi input
DC power supply is not isolated from, exports and input high-frequency isolation, multi input power supply altogether, between multiple input single output high-frequency inverter circuit
Time sharing power supply, circuit topology are succinct in one switch periods, share output high-frequency isolation transformation week wave conversion filter circuit, single-stage
Power conversion, conversion efficiency are high, output voltage ripple is small, output Small And Medium Capacity, the features such as application prospect is extensive.External in parallel point
When selecting switch voltage-type single-stage multi input annulus inverter in high frequency comprehensive performance, will be than traditional DC converter and inversion
The multi input inverter that device two-stage cascade forms is superior.
Description of the drawings
Fig. 1, the two-stage type new energy distributed power supply system of traditional multiple Unidirectional direct-current converter output terminal parallel connections.
Fig. 2, the two-stage type new energy distributed power supply system of traditional multiple Unidirectional direct-current converter output terminals series connection.
Fig. 3, novel single-stage multi input inverter principle block diagram.
Fig. 4, external Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency functional block diagram.
Fig. 5, external Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency circuit structure diagram.
Fig. 6, the external Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency of bi-polarity phase-shifted control
Steady principle oscillogram.
Fig. 7, the external Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency of uni-polarity phase-shifted control
Steady principle oscillogram.
Fig. 8, external Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency circuit topology example
One ----recommend full wave type circuit diagram.
Fig. 9, external Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency circuit topology example
Two ----push-pull bridge circuit diagram.
Figure 10, external Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency circuit topology example
Three ----push-pull ortho-exciting full wave type circuit diagram.
Figure 11, external Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency circuit topology example
Four ----push-pull ortho-exciting bridge circuit schematic diagram.
Figure 12, external Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency circuit topology example
Five ----half-bridge full wave type circuit diagram.
Figure 13, external Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency circuit topology example
Six ----half-bridge bridge circuit schematic diagram.
Figure 14, external Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency circuit topology example
Seven ----full-bridge full wave type circuit diagram.
Figure 15, external Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency circuit topology example
Eight ----full-bridge bridge circuit schematic diagram.
Figure 16, it is the output voltage of external Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency, defeated
Enter instantaneous current feedback bipolarity phase shift principal and subordinate's power distribution energy management control block diagram.
Figure 17, it is the output voltage of external Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency, defeated
Enter instantaneous current feedback bipolarity phase shift principal and subordinate's power distribution energy management control principle oscillogram.
Figure 18, it is the output voltage of external Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency, defeated
Enter instantaneous current feedback unipolarity phase shift principal and subordinate's power distribution energy management control block diagram.
Figure 19, it is the output voltage of external Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency, defeated
Enter instantaneous current feedback unipolarity phase shift principal and subordinate's power distribution energy management control principle oscillogram.
Figure 20 has output terminal and connects the external Parallel Time-sharing selecting switch voltage of single-stage isolated Bidirectional charging-discharging converter
Type single-stage multi input high frequency link autonomous power supply system.
Figure 21 has the maximum power output energy of single-stage isolated Bidirectional charging-discharging converter output voltage separate control loop
Measure management and controlling tactics.
Figure 22, the output voltage u of autonomous power supply systemoWith output inductor electric current iLf、iLf' waveform.
Specific embodiment
With reference to the accompanying drawings of the specification and embodiment is described further technical scheme of the present invention.
External Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency, is defeated by a multi input list
Go out high-frequency inverter circuit by multiple input filters and a shared output high-frequency isolation transformation week wave conversion filtering altogether
Circuit connection is formed, and each input terminal of multiple input single output high-frequency inverter circuit and the output terminal of each input filter are one by one
Corresponding connection, the output terminal of multiple input single output high-frequency inverter circuit and the output high-frequency isolation transformation week wave conversion filtered electrical
The high frequency transformer input terminal on road is connected, and the multiple input single output high-frequency inverter circuit is by external multi-channel parallel timesharing
Selection four-quadrant power switch circuit, bidirectional power flow single-input single-output high-frequency inverter circuit sequentially cascade composition, arbitrary
Moment is equivalent to a bidirectional power flow single-input single-output high-frequency inverter circuit, the external multi-channel parallel timesharing selection four
Quadrant power switch circuit per being only made of all the way a four-quadrant power switch and each road output terminal connects together, it is described
Output high-frequency isolation transformation week wave conversion filter circuit sequentially cascaded by high frequency transformer, frequency converter, output filter
It forms, the frequency converter is opened by multiple four-quadrant high frequency powers that can bear bi-directional voltage stress and bidirectional current stress
It closes and forms.
Functional block diagram, the circuit knot of external Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency
The steady principle waveform of structure, bi-polarity phase-shifted control and uni-polarity phase-shifted control inverter, respectively as shown in FIG. 4,5,6, 7.Figure
4th, in 5,6,7, Ui1、Ui2、…、UinFor n roads input direct-current voltage source (n is the natural number more than 1), ZLIt is exchanged for single-phase output
Load (loads) including single phase ac passive load and single phase ac power grid, uo、ioRespectively single-phase output alternating voltage with exchange
Electric current.The single output high-frequency inverter circuit of n inputs is by external multi-channel parallel timesharing selection four-quadrant power switch circuit, two-way
Power flow single-input single-output high-frequency inverter circuit sequentially cascades composition, wherein external multi-channel parallel timesharing selection four-quadrant work(
Rate switching circuit be bi-directional voltage stress can be born by n, the four-quadrant high frequency power switch of bidirectional current stress is formed, two-way
Power flow single-input single-output high-frequency inverter circuit is by multiple two quadrants that can bear unidirectional voltage stress, bidirectional current stress
High frequency power switch is formed, and MOSFET, IGBT, GTR constant power device can be selected；Export the wave conversion filtering of high-frequency isolation transformation week
Circuit is sequentially cascaded and is formed by high frequency transformer, frequency converter, output filter, and wherein frequency converter can be held by multiple
It is switched and realized by the four-quadrant high frequency power of bi-directional voltage stress, bidirectional current stress, only depicted in figure as space is limited applicable
In the circuit diagram of the LC output filters of passive AC load, and it is not drawn into being suitable for L or LCL the output filter of AC network load
The circuit diagram of wave device；N roads input filter is LC wave filters (the filter inductance L of the dashed box containing additioni1、Li2、…、Lin) or capacitance
Wave filter (the filter inductance L without addition dashed boxi1、Li2、…、Lin), it can be more using n roads input direct-current electric current during LC wave filters
Smoothly.The single high-frequency inverter circuit that exports of n inputs is by n roads input direct-current voltage source Ui1、Ui2、…、UinAmplitude is modulated into depending on defeated
Enter the more level high-frequency voltage square waves of bipolarity binary states of DC voltage or bipolarity tri-state multilevel SPWM voltage wave uABOr uA′B′,
Transformation is isolated through high frequency transformer T and frequency converter is demodulated to bipolarity binary states or unipolarity tri-state multilevel SPWM voltage wave
uCD, through output filter Lf-CfObtain the simple alternating current of high quality on the net in single phase ac passive load or single-phase alternating current afterwards
Voltage uoOr simple sinusoidal alternating current io, n input pulse electric current of the single output high-frequency inverter circuit of n inputs is through input filter
Li1-Ci1、Li2-Ci2、…、Lin-CinOr Ci1、Ci2、…、CinAfterwards in n roads input DC power Ui1、Ui2、…、UinIt is middle to obtain smoothly
Input direct-current electric current Ii1、Ii2、…、Iin.It should be added that more level high-frequency voltage square waves of bipolarity binary states and double
Polarity tri-state multilevel SPWM voltage wave uABOr uA′B′Amplitude be ± 2 (Ui1、Ui2、…、Uin) (push-pull circuit), ± (Ui1、
Ui2、…、Uin) (push-pull ortho-exciting formula, full bridge circuit), ± 1/2 (Ui1、Ui2、…、Uin) (half bridge circuit), uCDAmplitude be
±(Ui1N2/N1、Ui2N2/N1、…、UinN2/N1) (push-pull type, push-pull ortho-exciting formula, full bridge circuit), ± 1/2 (Ui1N2/N1、
Ui2N2/N1、…、UinN2/N1) (half bridge circuit).
External Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency belongs to voltage-dropping type inverter, n
A input source is to load Parallel Time-sharing power supply.The principle of this inverter is equivalent to multiple voltage-type single input inverters and is exporting
The superposition of terminal voltage, i.e. output voltage uoWith input direct-current voltage (Ui1、Ui2、…、Uin), high frequency transformer turn ratio N2/N1, duty
Than (d1、d2、…、dj、…、dn) between relationship it is more complicated；When the amplitude of n input source is equal, i.e. Ui1=Ui2=...=
Uin=Ui, there is uo=(d1+d2+…+dk)UiN2/N1=(dj+dj+1+…+dn)UiN2/N1=(180 ° of-θ)/180 ° of UiN2/N1It is (single
Polarity phase shifting control) or uo=[2 (dj+dj+1+…+dn)-1]UiN2/N1=[2 (180 ° of-θ)/180 ° -1] UiN2/N1(bipolarity
Phase shifting control), wherein 1≤k, j≤n, θ is phase shifting angle.For appropriate phase shifting angle θ and high frequency transformer turn ratio N2/N1, uoIt can
Greater than, equal to or less than the sum of input direct-current voltage Ui1+Ui2+…+Uin, the high frequency transformer in the inverter not only plays
Improve the security reliability and Electro Magnetic Compatibility of invertor operation, it is often more important that play matched output voltage and input voltage
Effect, that is, the output voltage for realizing inverter is higher than, equal to or less than the sum of input direct-current voltage Ui1+Ui2+…+Uin's
Technique effect, application range have obtained widening significantly.Since there are 0≤θ≤180o, u can be releasedo＜ (Ui1+Ui2+…+
Uin)N2/N1, i.e. output voltage uoAlways it is less than input direct-current voltage (Ui1、Ui2、…、Uin) and high frequency transformer turn ratio N2/N1Multiply
The sum of product (Ui1+Ui2+…+Uin)N2/N1；Since the inverter belongs to single stage circuit structure, transformer working frequency is height
Frequently, multi-channel parallel timesharing selection four-quadrant power switch is located at except high-frequency inverter circuit, therefore this kind of inverter is referred to as external
Parallel Time-sharing selecting switch voltage-type (voltage-dropping type) single-stage multi input annulus inverter in high frequency.N input source of the inverter exists
In one HF switch period can only timesharing to output AC load power supply, duty ratio can identical (d1=d2=...=dn),
It can difference (d1≠d2≠…≠dn)。
External Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency of the present invention, due to altogether
With a bidirectional power flow single-input single-output high-frequency inverter circuit and an output high-frequency isolation transformation week wave conversion filtered electrical
Road, there is substantially for the circuit structure of the traditional multi input inverter formed with DC converter and inverter two-stage cascade
Difference.Therefore, inverter of the present invention has novelty and creativeness, and with output with inputting high-frequency isolation, how defeated
Enter power supply time sharing power supply, circuit topology are succinct, single-stage power conversion, step-up ratio are big, input voltage prepare flexibly, conversion efficiency it is high
(meaning that energy loss is small), output voltage ripple be small, output Small And Medium Capacity, it is at low cost, application prospect is extensive the advantages that, be one
The ideal energy-saving type single-stage multi input inverter of kind, builds energy-saving, conservation-minded society today, more vigorously advocating
There is important value.
External Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency circuit topology race embodiment, such as
Shown in Fig. 8,9,10,11,12,13,14,15.External multi-channel parallel timesharing selects four-quadrant power switch circuit by n energy
Bear bi-directional voltage stress, the four-quadrant high frequency power switch of bidirectional current stress is realized, bidirectional power flow single-input single-output
High-frequency inverter circuit is defeated by multiple two quadrant high frequency powers switch realizations that can bear unidirectional voltage stress, bidirectional current stress
Go out cycle translation circuit and then switch realization by multiple four-quadrant high frequency powers.Precisely, all-wave is recommended shown in Fig. 8,10,12
Formula, push-pull ortho-exciting full wave type, half-bridge full wave type circuit are to bear bi-directional voltage stress, bidirectional current stress by (n+2) is a
Four-quadrant high frequency power switchs and 2 can bear unidirectional voltage stress, the two quadrant high frequency powers switch of bidirectional current stress comes
It realizes, push-pull bridge shown in Fig. 9,11,13, push-pull ortho-exciting bridge-type, half-bridge bridge circuit are to bear bi-directional voltage by (n+4) is a
Stress, bidirectional current stress four-quadrant high frequency power switch and 2 can bear unidirectional voltage stress, bidirectional current stress two
Quadrant high frequency power switch realizes, Figure 14, full-bridge full wave type shown in 15, full-bridge bridge circuit are by (n+2), (n+4) respectively
It is a can bear bi-directional voltage stress, bidirectional current stress four-quadrant high frequency power switch and 4 can bear unidirectional voltage should
Power, two quadrant high frequency powers of bidirectional current stress switch to realize.It should be added that Fig. 8,9,10,11,12,13,
14th, circuit shown in 15 give input filter for LC wave filters situation (Figure 12, half bridge circuit shown in 13 input filter electricity
Hold for two bridge arm capacitance C1、C2), circuit when not providing input filter as space is limited as capacitive filter situation；Figure 10,
The circuit of push-pull ortho-exciting formula shown in 11 and Figure 12, that half bridge circuit shown in 13 is only applicable to n input supply voltage is of substantially equal
Situation；Circuit shown in Fig. 8-15 only depicts the circuit diagram of the LC output filters suitable for passive AC load, and is not drawn into
Suitable for the circuit diagram of the L or LCL output filters of AC network load.External Parallel Time-sharing selecting switch voltage-type single-stage is more
The power switching voltage stress of the topological embodiment of eight kinds of annulus inverter in high frequency is inputted, as shown in table 1.In table 1, Uimax=max
(Ui1, Ui2..., Uin), N=1,2 ..., n.Push-pull type, push-pull ortho-exciting formula circuit are suitable for middle power low voltage and input inversion occasion,
Half bridge circuit is suitable for low-power high-voltage and inputs inversion occasion, and full bridge circuit is suitable for middle power high input voltage inversion field
It closes.The circuit topology race is suitable for changing multiple input dc power bucklings altogether, unstable into a required voltage swing, steady
Fixed good output alternating current can be used to realize sigle-stage AC a variety of new energy point with excellent performance and wide application prospect
Cloth electric power system, such as photovoltaic cell 40-60VDC/220V50HzAC or 115V400HzAC, 10kw pem fuels
Battery 85-120V/220V50HzAC or 115V400HzAC, middle-size and small-size family wind-power electricity generation 24-36-48VDC/
How defeated 220V50HzAC or 115V400HzAC, large-scale wind generating 510VDC/220V50HzAC or 115V400HzAC etc. be
Enter source to power to AC load or AC network.
The 1 external topological embodiment work(of eight kinds of Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency of table
Rate switching voltage stress
Energy management control strategy is vital for a variety of new energy joint electric power system.It is more due to existing
A input source and corresponding power switch unit, it is therefore desirable to multiple duty ratios be controlled, that is, there are multiple controls
Degree of freedom, this energy management just for a variety of new energy provide possibility.External Parallel Time-sharing selecting switch voltage-type single-stage
The energy management control strategy of multi input annulus inverter in high frequency, need to be provided simultaneously with the energy management of input source, photovoltaic cell and
MPPT, output voltage (electric current) the control three zones of the new energy equipments such as wind-driven generator, also need to consider electric power storage sometimes
Smooth and seamless switching of the charge and discharge control and system in pond under different powering modes.External Parallel Time-sharing selecting switch voltage-type
Single-stage multi input annulus inverter in high frequency uses two different energy management modes：(1) energy management modes I-- principals and subordinates power
The method of salary distribution, it is known that power needed for load as far as possible by main power supply unit the 1st, 2 ..., n-1 roads input source provide, give the 1st,
2nd ..., the input current of n-1 roads input source, be equivalent to the given 1st, 2 ..., the input power of n-1 roads input source, needed for load
Deficit power by from the n-th road of power supply unit input source provide, can be not required to addition batteries to store energy equipment；(2) energy management
Mode II-maximum power output mode, the 1st, 2 ..., n roads input source with maximum power output to load, eliminate electric power storage
Pond energy storage device realizes the requirement that grid-connected system makes full use of the energy, if in output terminal and connecing an accumulator and filling
Discharger can also be achieved the stabilization of autonomous power supply system output voltage (electric current).When n roads new energy input voltage to timing,
By control the 1st, 2 ..., the input current of n roads input source, be equivalent to control the 1st, 2 ..., the input work of n roads input source
Rate.
External Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency, using output voltage, input
The phase shift of instantaneous current feedback bipolarity, unipolarity phase shift principal and subordinate's power distribution energy management control strategy, to form independent supply
Electric system；Or using the phase shift of input current instantaneous values feedback bipolarity, unipolarity phase shift maximum power output energy management control
Strategy, to form grid-connected system.1st, 2 ..., n-1 roads input source output power is fixed and the supplement load of the n-th road input source
The output voltage of required deficit power, input current instantaneous values feedback bipolar SPWM, Unipolar SPWM principal and subordinate's power distribution
Energy management control block diagram and control principle waveform, respectively as shown in Figure 16,17,18,19.Figure 16, the bipolarity shown in 17 are moved
The basic thought of phase control scheme is that the single output high-frequency inverter circuit of n inputs generates the more level high-frequency square waves of bipolarity binary states, the
1st, 2 ..., the timesharing turn-on time of n-1 roads power switch is to T according to error current sizes/ 2 times, which were allocated, (realizes the
1st, 2 ..., the maximum power output of n-1 roads input source), it is (real to distribute the turn-on time that the remaining time is the n-th road power switch
Existing n-th tunnel input source power is supplied), any moment, always and only input source access ensured that the positive of energy is transmitted all the way
Or reversed feedback, energy in time reversely feed back to that input source all the way accessed at that time, pass through frequency converter and n inputs are single
The phase shift between high-frequency inverter circuit is exported to realize the stabilization of inverter output voltage, by the commutation overlap of frequency converter
Realize high frequency transformer leakage inductance energy nature commutation and frequency converter Zero Current Switch, the control strategy be suitable for Fig. 8-
Circuit shown in 15.Inverter the 1st, 2 ..., the input current feedback signal I on n-1 roadsi1f、Ii2f、…、Ii(n-1)fRespectively with the 1st,
2nd ..., the reference current signal I that n-1 roads input source obtains after maximum power point calculatesi1r、Ii2r、…、Ii(n-1)rIt is accumulated through ratio
Adjuster is divided to compare amplification, current error amplified signal I1e、I2e、…、I(n-1)eWith the unipolarity saw-toothed carrier-u after displacementc+
Ucm/ 2 compare, and the Parallel Time-sharing selection work(of the single output high-frequency inverter circuit of n inputs is obtained after appropriate combinational logic circuit
The control signal u of rate switchgss1、ugss2、…、ugssn；Bipolarity saw-toothed carrier ucN inputs are obtained after rising edge two divided-frequency
The control signal u of single output high-frequency inverter circuit power switchgs1(ugs4) and its inversion signal ugs2(ugs3)；Inverter output electricity
Press feedback signal uofWith reference sinusoidal voltage urCompare amplification, voltage error amplified signal u through proportional and integral controllereRespectively with
Bipolarity saw-toothed carrier ucWith-ucCompare, after considering outputting inductance current polarity selection signal and being properly combined logic circuit
Obtain frequency converter power switch control signal ugs5(ugs′5)、ugs6(ugs′6)、ugs7(ugs′7)、ugs8(ugs′8)。
Figure 18, uni-polarity phase-shifted control scheme shown in 19 basic thought be to pass through the single output high-frequency inversion electricity of n inputs
Phase shift generation bipolarity tri-state multilevel SPWM wave between the right bridge arm in road and left bridge arm, frequency converter are more by bipolarity tri-state
Level SPWM wave is demodulated to unipolarity tri-state multilevel SPWM wave, the bipolarity three that frequency converter is exported in high-frequency inverter circuit
State multilevel SPWM wave carries out switch conversion so as to fulfill zero voltage switch during being zero, any moment, there is always only have all the way
Input source access (one state or " -1 " state, ensure energy it is positive transmit or reversed feedback) or 0 state (afterflow state), energy is fitted
When reversely feed back to that input source all the way accessed at that time, which is only applicable to Figure 14, circuit shown in 15.1st,
2nd ..., the timesharing turn-on time of n-1 roads power switch is the left bridge arm and You Qiao to being distributed by SPWM according to error current size
Arm Continuity signal or signal usumBe allocated (realize the 1st, 2 ..., the maximum power output of n-1 roads input source), distribution is surplus
Turn-on time (realize n-th tunnel input the supplying of source power) of the remaining time for the n-th road power switch.Inverter the 1st, 2 ...,
The input current feedback signal I on n-1 roadsi1f、Ii2f、…、Ii(n-1)fRespectively with the 1st, 2 ..., n-1 roads input source is through maximum power
The reference current signal I that point obtains after calculatingi1r、Ii2r、…、Ii(n-1)rCompare amplification, current error through proportional and integral controller
Amplified signal I1e、I2e、…、I(n-1)eRespectively by obtaining n inputs after timesharing pulse-generating circuit and appropriate logic circuit
The control signal u of the Parallel Time-sharing selection power switch of single output high-frequency inverter circuitgss1、ugss2、…、ugssn；Inverter it is defeated
Go out voltage feedback signal uofWith reference sinusoidal voltage urIt is compared and enlarged through proportional and integral controller, voltage error amplified signal
ueAnd its inversion signal-ueRespectively with bipolarity saw-toothed carrier ucCompare, n is obtained after failing edge two divided-frequency and not circuit
The power switch control signal u of the single output high-frequency inverter circuit of inputgs1、ugs2、ugs3、ugs4；U in figuresumRepresent that n inputs are single defeated
Go out the left bridge arm of high-frequency inverter circuit and right bridge arm Continuity signal or signal；Bipolarity saw-toothed carrier ucThrough lower liter along two divided-frequency
The control signal u of frequency converter power switch is obtained afterwardsgs5(ugs′5)、ugs6(ugs′6)、ugs7(ugs′7)、ugs8(ugs′8).Dividing
When pulse-generating circuit in, Ie∑、Ie∑m、I* e∑Respectively current error amplified signal I1e、I2e、…、I(n-1)eAnd electric current miss
Poor amplified signal I1e、I2e、…、I(n-1)eThe maximum value of sum and the ratio of the two, V, k (0~1) are respectively usumIntegration
Value and proportionality coefficient.
1st, 2 ..., n-1 roads current regulator independently work with the n-th road voltage regulator, the 1st, 2 ..., n-1 roads
Current regulator is used to implement the 1st, 2 ..., the maximum power output of n-1 roads input source, the n-th road voltage regulator is used to implement
The stabilization of inverter output voltage, n roads input source, which is combined, to power to the load.When input voltage or load variation, pass through adjusting
Reference voltage urWith reference current Ii1r、Ii2r、…、Ii(n-1)r, or adjust feedback voltage uofWith feedback current Ii1f、Ii2f、…、
Ii(n-1)fTo change error voltage signal ueWith error current signal I1e、I2e、…、I(n-1)e, so as to change duty ratio d1、d2、…、
dn, therefore can realize the inverter output voltage, the adjusting of input current (output power) and stabilization.
Input current is controlled when the n-th roads of Figure 16-19 Zhong input source is designed as input current feedback, then is constituted defeated
Enter the phase shift of instantaneous current feedback bipolarity, unipolarity phase shift maximum power output energy management control strategy.
Bipolarity phase shift maximum power output energy management control strategy, which can be sketched, is：Inverter the 1st, 2 ..., n roads it is defeated
Enter current feedback signal Ii1f、Ii2f、…、IinfRespectively with the 1st, 2 ..., n roads input source obtains after maximum power point calculates
Reference current signal Ii1r、Ii2r、…、IinrCompare amplification, current error amplified signal I through proportional and integral controller1e、I2e、…、
I(n-1)eWith the unipolarity saw-toothed carrier-u after displacementc+Ucm/ 2 compare, and n inputs are obtained after appropriate combinational logic circuit
The control signal u of the Parallel Time-sharing selection power switch of single output high-frequency inverter circuitgss1、ugss2、…、ugssn；Bipolarity sawtooth
Shape carrier wave ucThe control signal u of the single output high-frequency inverter circuit power switch of n inputs is obtained after rising edge two divided-frequencygs1(ugs4)
And its inversion signal ugs2(ugs3)；Current error amplified signal IneWith the product signal i of sinusoidal synchronizing signaleBipolarity saw respectively
Tooth form carrier wave ucWith-ucCompare, consider outputting inductance current polarity selection signal and obtain week after appropriate combinational logic circuit
The control signal u of wave converter power switchgs5(ugs′5)、ugs6(ugs′6)、ugs7(ugs′7)、ugs8(ugs′8).Unipolarity phase shift is most
High-power output energy management control strategy, which can be sketched, is：Inverter the 1st, 2 ..., the input current feedback signal I on n roadsi1f、
Ii2f、…、IinfRespectively with the 1st, 2 ..., the reference current signal I that is obtained after maximum power point calculates of n roads input sourcei1r、
Ii2r、…、IinrCompare amplification, current error amplified signal I through proportional and integral controller1e、I2e、…、I(n-1)eRespectively by dividing
When pulse-generating circuit and appropriate logic circuit after obtain the Parallel Time-sharing selection work(of the single output high-frequency inverter circuit of n inputs
The control signal u of rate switchgss1、ugss2、…、ugssn；Current error amplified signal IneWith the product signal i of sinusoidal synchronizing signale
And its inversion signal-ieRespectively with bipolarity saw-toothed carrier ucCompare, it is defeated to obtain n after failing edge two divided-frequency and not circuit
Enter the power switch control signal u of single output high-frequency inverter circuitgs1、ugs2、ugs3、ugs4；U in figuresumRepresent the single output of n inputs
The left bridge arm of high-frequency inverter circuit and right bridge arm Continuity signal or signal；Bipolarity saw-toothed carrier ucThrough lower liter along after two divided-frequency
Obtain the control signal u of frequency converter power switchgs5(ugs′5)、ugs6(ugs′6)、ugs7(ugs′7)、ugs8(ugs′8).In timesharing
In pulse-generating circuit, Ie∑、Ie∑m、I* e∑Respectively current error amplified signal I1e、I2e、…、I(n-1)eAnd current error
Amplified signal I1e、I2e、…、I(n-1)eThe maximum value of sum and the ratio of the two, V, k (0~1) are respectively usumIntegrated value
And proportionality coefficient.1st, 2 ..., n roads current regulator independently work, be used to realize the maximum power of respective input source
Output, n roads input source, which is combined, to power to the load.
The waveform of bi-polarity phase-shifted control principle shown in Figure 17 has marked HF switch cycle TSWith a certain HF switch cycle TS
Interior 1st, 2 ..., the turn-on time T of n roads input sourceon1、Ton2、…、TonnAnd total turn-on time Ton=Ton1+Ton2+…+
Tonn, Figure 17, the common turn-on time T of bipolarity and uni-polarity phase-shifted control shown in 19comWith phase shifting angle θ in an output voltage
It is to change by sinusoidal rule in period.In addition, for half bridge circuit shown in Figure 12,13, it should be by half of input direct-current voltage
It is worth (Ui1/2、Ui2/2、…、Uin/ 2) it is updated in voltage transfer ratio formula and is calculated.
In order to form the autonomous power supply system that can make full use of multiple input sources energy, multiple input source should be operated in maximum work
The rate way of output and energy storage device is needed to configure, to realize the stabilization of output voltage, i.e., in the output terminal of inverter and connect one
Single-stage isolated Bidirectional charging-discharging converter, as shown in figure 20.The single-stage isolated Bidirectional charging-discharging converter is by input filter
(Li、CiOr Ci), high-frequency inverter, high frequency transformer, frequency converter, output filter (Lf′、Cf') sequentially cascade composition, institute
The frequency converter stated is switched by the four-quadrant high frequency power that can bear bi-directional voltage stress and bidirectional current stress and formed.It is described
Single-stage isolated Bidirectional charging-discharging converter energy forward direction transmit (energy storage device electric discharge), back transfer (energy storage device charging)
When, it is equivalent to a single-stage high frequency link DC-AC converter and a single-stage high frequency link AC-DC converter respectively.
The autonomous power supply system is used with single-stage isolated Bidirectional charging-discharging converter output voltage separate control loop
Maximum power output energy management control strategy, as shown in figure 21.As bearing power Po=UoIoMore than the maximum in multiple input source
The sum of power P1max+P2max+…+PnmaxWhen, the energy storage devices such as accumulator, super capacitor are become by single-stage isolated Bidirectional charging-discharging
Parallel operation provides required deficit power-powering mode II to load, and energy storage device individually powers to the load -- powering mode III,
Belong to the egregious cases of powering mode II；As bearing power Po=UoIoThe sum of maximum power less than multiple input source P1max+
P2max+…+PnmaxWhen, the dump energy that multiple input source exports is by single-stage isolated Bidirectional charging-discharging converter to energy storage device
Charging -- powering mode I.By taking band resistive load as an example, the power flow direction control of single-stage isolated Bidirectional charging-discharging converter is discussed,
As shown in figure 22.For output filter capacitor Cf、Cf' and load ZLFor, external Parallel Time-sharing selecting switch voltage-type single-stage is more
The output terminal and connecing of input annulus inverter in high frequency and single-stage isolated Bidirectional charging-discharging converter be equivalent to two current sources and
Connection superposition.The energy management control strategy as shown in Figure 21 is it is found that external Parallel Time-sharing selecting switch voltage-type single-stage multi input is high
The output inductor electric current i of frequency annulus inverterLfWith output voltage uoWith the same phase of frequency, active power of output；Charge/discharge transformation
Device is by output voltage uoWith reference voltage uorefError amplification signal uoeWith high frequency carrier hand over cut generation SPWM signals into
Row control, output inductor electric current iLf' and uoBetween there are phase difference θ, different phase difference θs means that output is different big
Small and direction active power.Work as Po=P1max+P2max+…+PnmaxWhen, θ=90 °, the active power of charge/discharge transformation device output
It is zero, in light condition；Work as Po>P1max+P2max+…+PnmaxWhen, uoReduce, 90 ° of θ ＜, charge/discharge transformation device output wattful power
Rate, energy storage device provide the deficit power needed for load to load discharge, i.e. energy storage device；Work as Po＜ P1max+P2max+…+Pnmax
When, uoIncrease, 90 ° of θ ＞, the negative active power of charge/discharge transformation device output are loaded to energy storage device feedback energy, i.e. multiple input
The dump power of source output charges to energy storage device, is loaded when θ=180 ° maximum to the energy of energy storage device feedback.Therefore,
The energy management control strategy can be according to PoWith P1max+P2max+…+PnmaxRelative size control single-stage isolated is two-way to fill in real time
The power flow size and Orientation of electric discharge converter realizes smooth and seamless switching of the system under three kinds of different powering modes.
Claims (3)
1. a kind of external Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency, it is characterised in that：It is this
Inverter is by multiple input filters and a shared output altogether by a multiple input single output high-frequency inverter circuit
The wave conversion filter circuit connection of high-frequency isolation transformation week is formed, each input terminal of multiple input single output high-frequency inverter circuit with it is every
The output terminal of a input filter corresponds connection, and the output terminal of multiple input single output high-frequency inverter circuit and the output are high
The high frequency transformer input terminal of frequency isolation transformation week wave conversion filter circuit is connected, the multiple input single output high-frequency inversion
Circuit is by external multi-channel parallel timesharing selection four-quadrant power switch circuit, bidirectional power flow single-input single-output high-frequency inversion
Circuit sequentially cascades composition, is equivalent to a bidirectional power flow single-input single-output high-frequency inverter circuit at any time, described
External multi-channel parallel timesharing selection four-quadrant power switch circuit per being only made of all the way a four-quadrant power switch and
Each road output terminal connects together, and described output high-frequency isolation transformation week wave conversion filter circuit is by high frequency transformer, cycle
Converter, output filter sequentially cascade composition, and the frequency converter is by multiple bi-directional voltage stress and two-way of bearing
The four-quadrant high frequency power switch of current stress is formed.
2. external Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency according to claim 1,
It is characterized in that：The circuit topology of the external Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency is
Recommend full wave type, push-pull bridge, push-pull ortho-exciting full wave type, push-pull ortho-exciting bridge-type, half-bridge full wave type, half-bridge bridge-type, full-bridge all-wave
Formula, full-bridge bridge circuit.
3. external Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency according to claim 1,
It is characterized in that：The output terminal of the external Parallel Time-sharing selecting switch voltage-type single-stage multi input annulus inverter in high frequency simultaneously connects
The single-stage isolated Bidirectional charging-discharging converter of one energy storage device, to form the autonomous power supply system of an output voltage stabilization；
The single-stage isolated Bidirectional charging-discharging converter by input filter, high-frequency inverter, high frequency transformer, frequency converter,
Output filter sequentially cascades composition, and the frequency converter is by that can bear the four of bi-directional voltage stress and bidirectional current stress
Quadrant high frequency power switch is formed；Multiple input source is operated in maximum power output mode, according to bearing power with it is multiple defeated
The relative size for entering the sum of source maximum power controls the power flow size and Orientation of single-stage isolated Bidirectional charging-discharging converter in real time,
Realize that system output voltage is stablized and the smooth and seamless of energy storage device charge and discharge switches.
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| CN101267167A (en) * | 2008-01-09 | 2008-09-17 | 福州大学 | Voltage increase high-frequency link reverser |
| CN101534059A (en) * | 2009-04-14 | 2009-09-16 | 福州大学 | Single-isolation pressure increase and reduction type multi-input direct current converter |
| CN101534055A (en) * | 2009-04-14 | 2009-09-16 | 福州大学 | Single-isolation pressure increase and reduction type multi-input direct current converter |
| CN101534054A (en) * | 2009-04-14 | 2009-09-16 | 福州大学 | Single-isolation combination pressure increase and reduction type multi-input direct current converter |
| US20140301124A1 (en) * | 2013-04-03 | 2014-10-09 | Ablerex Electronics Co., Ltd. | Cascade Bridge-type DC-AC Power Conversion Method and Converter Device Thereof |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101267167A (en) * | 2008-01-09 | 2008-09-17 | 福州大学 | Voltage increase high-frequency link reverser |
| CN101534059A (en) * | 2009-04-14 | 2009-09-16 | 福州大学 | Single-isolation pressure increase and reduction type multi-input direct current converter |
| CN101534055A (en) * | 2009-04-14 | 2009-09-16 | 福州大学 | Single-isolation pressure increase and reduction type multi-input direct current converter |
| CN101534054A (en) * | 2009-04-14 | 2009-09-16 | 福州大学 | Single-isolation combination pressure increase and reduction type multi-input direct current converter |
| US20140301124A1 (en) * | 2013-04-03 | 2014-10-09 | Ablerex Electronics Co., Ltd. | Cascade Bridge-type DC-AC Power Conversion Method and Converter Device Thereof |
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