CN108199595A - Flyback cycle changing type single-stage multi input inverter is isolated in Multiple coil time sharing power supply - Google Patents
Flyback cycle changing type single-stage multi input inverter is isolated in Multiple coil time sharing power supply Download PDFInfo
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- CN108199595A CN108199595A CN201810020135.2A CN201810020135A CN108199595A CN 108199595 A CN108199595 A CN 108199595A CN 201810020135 A CN201810020135 A CN 201810020135A CN 108199595 A CN108199595 A CN 108199595A
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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
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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
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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
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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
- H02M7/493—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
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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
- 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
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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
- H02M1/0067—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
Abstract
The present invention relates to a kind of Multiple coil time sharing power supplies to be isolated flyback cycle changing type single-stage multi input inverter, its circuit structure is to be made of the shared output week wave conversion filter circuit connection of multiple mutually isolated, with input filter high-frequency inverter circuits and one storage transformer of a multiple input single output, each input terminal of multiple input single output storage transformer couples with the output terminal of each high-frequency inverter circuit one-to-one correspondence, and the input terminal of the output terminal and all wave conversion filter circuits of output of multiple input single output storage transformer is connected.This inverter have the characteristics that multiple input sources altogether or not altogether, multiple input sources time sharing power supply, output and input electrical isolation, share all wave conversion filter circuits of output, simple circuit, single-stage power conversion, power density is high, conversion efficiency is high, load short circuits when reliability is high, application prospect is extensive, the low capacity distributed power supply system to realize a variety of new energy joint power supplies has established key technology.
Description
Technical field
Flyback cycle changing type single-stage multi input inverter is isolated in Multiple coil time sharing power supply according to the present invention, belongs to electricity
Power electronics converter technique.
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 transformer or the working frequency of storage transformer
In more than 20kHz, volume, weight greatly reduce, and audio noise also eliminates.Therefore, with dc generator, electric power storage
Pond, photovoltaic cell and fuel cell etc. are the secondary transformation of electrical energy occasion of main dc power supply, and inverter applies valency with important
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
It is a kind of altogether or uncommon with the power supply of a variety of new energy joint, input DC power the invention aims to provide
Ground, storage transformer have multiple primary side windings and an isolation between vice-side winding, high-frequency inverter circuit, export and input
Between isolation, time sharing power supply, circuit topology are succinct in one switch periods of multiple input power supply, all wave conversion filtered electricals that shares output
Road, single-stage power conversion, voltage matches ability is strong, power density is high, conversion efficiency is high, load short circuits when reliability is high, output
The Multiple coil time sharing power supply isolation flyback cycle changing type single-stage multi input inverter for the features such as capacity is small, application prospect is extensive.
Technical program of the present invention lies in：A kind of Multiple coil time sharing power supply isolation flyback cycle changing type single-stage multi input is inverse
Become device, be the storage transformer by a multiple input single output by multiple mutually isolated, with input filter high frequencies
Inverter circuit and a shared output week wave conversion filter circuit connection are formed, multiple input single output storage transformer it is every
A input terminal couples with the output terminal one-to-one correspondence of each high-frequency inverter circuit, the output of multiple input single output storage transformer
The frequency converter input terminal with all wave conversion filter circuits of output is held to be connected, each height for carrying input filter
Frequency inverter circuit is sequentially cascaded and is formed by input filter, bidirectional power flow single-input single-output high-frequency inverter circuit, described
Output week wave conversion filter circuit sequentially cascaded and formed by frequency converter, output filter, each bidirectional power
Stream single-input single-output high-frequency inverter circuit is switched by four-quadrant high frequency power and two quadrant high frequency powers switch is formed or equal
It is only made of four-quadrant high frequency power switch, the frequency converter is by that can bear bi-directional voltage stress and bidirectional current stress
Four-quadrant high frequency power switch form, the multiple input source of the inverter within a HF switch period timesharing to load
Power supply.
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 structure of novel Multiple coil time sharing power supply, carry
Multiple coil time sharing power supply isolation flyback cycle changing type single-stage multi input inverter circuit structure and topological race and its energy are gone out
Management and controlling tactics, the i.e. circuit structure be by provide a kind of storage transformer of multiple input single output by it is multiple mutually every
From, high-frequency inverter circuit with input filter and a shared output week wave conversion filter circuit couple.
The present invention Multiple coil time sharing power supply isolation flyback cycle changing type single-stage multi input inverter, can by it is multiple not
Stable input direct-current voltage, which is reverse into needed for a load, stablizes good output alternating current, has multi-input direct current power supply
Not altogether or altogether, transformer have multiple primary side windings and one be isolated between vice-side winding, high-frequency inverter circuit, export with it is defeated
Enter that electrical isolation, time sharing power supply, circuit topology are succinct in one switch periods of multi input power supply, all wave conversion filtering that shares output
Circuit, single-stage power conversion, voltage matches ability is strong, power density is high, conversion efficiency is high, change range of input voltage is wide, negative
The features such as reliability is high when carrying short circuit, output capacity is small, application prospect is extensive.Multiple coil time sharing power supply isolation flyback week wave conversion
The comprehensive performance of type single-stage multi input inverter, the multi input that will be formed than traditional DC converter and inverter two-stage cascade
Inverter 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, Multiple coil time sharing power supply isolation flyback cycle changing type single-stage multi input inverter principle block diagram.
Fig. 5, Multiple coil time sharing power supply isolation flyback cycle changing type single-stage multi input inverter circuit structure chart.
Fig. 6, there are four types of the output voltage instantaneous value SPWM control single hose Multiple coil time sharing power supplies of operating mode selection for tool
Flyback cycle changing type single-stage multi input inverter steady principle oscillogram is isolated.
Fig. 7, there are four types of the output voltage instantaneous value SPWM control multitube Multiple coil time sharing power supplies of operating mode selection for tool
Flyback cycle changing type single-stage multi input inverter steady principle oscillogram is isolated.
Fig. 8, Multiple coil time sharing power supply isolation flyback cycle changing type single-stage multi input inverter circuit topology example
One ----single hose output capacitance filter circuit schematic diagram.
Fig. 9, Multiple coil time sharing power supply isolation flyback cycle changing type single-stage multi input inverter circuit topology example
Two ----single hose output capacitance inductor filter circuit diagram.
Figure 10, Multiple coil time sharing power supply isolation flyback cycle changing type single-stage multi input inverter circuit topology example
Three ----push-pull type output capacitance filter circuit schematic diagram.
Figure 11, Multiple coil time sharing power supply isolation flyback cycle changing type single-stage multi input inverter circuit topology example
Four ----push-pull type output capacitance inductor filter circuit diagram.
Figure 12, Multiple coil time sharing power supply isolation flyback cycle changing type single-stage multi input inverter circuit topology example
Five ----push-pull ortho-exciting formula output capacitance filter circuit schematic diagram.
Figure 13, Multiple coil time sharing power supply isolation flyback cycle changing type single-stage multi input inverter circuit topology example
Six ----push-pull ortho-exciting formula output capacitance inductor filter circuit diagram.
Figure 14, Multiple coil time sharing power supply isolation flyback cycle changing type single-stage multi input inverter circuit topology example
Seven ----semibridge system output capacitance filter circuit schematic diagram.
Figure 15, Multiple coil time sharing power supply isolation flyback cycle changing type single-stage multi input inverter circuit topology example
Eight ----semibridge system output capacitance inductor filter circuit diagram.
Figure 16, Multiple coil time sharing power supply isolation flyback cycle changing type single-stage multi input inverter circuit topology example
Nine ----full-bridge type output capacitance filter circuit schematic diagram.
Figure 17, Multiple coil time sharing power supply isolation flyback cycle changing type single-stage multi input inverter circuit topology example
Ten ----full-bridge type output capacitance inductor filter circuit diagram.
Figure 18, there are four types of works for single hose Multiple coil time sharing power supply isolation flyback cycle changing type single-stage multi input inverter tool
Output voltage, the input current instantaneous value SPWM principal and subordinate's power distribution energy management control block diagrams of operation mode selection.
Figure 19, there are four types of works for multitube Multiple coil time sharing power supply isolation flyback cycle changing type single-stage multi input inverter tool
Output voltage, the input current instantaneous value SPWM principal and subordinate's power distribution energy management control block diagrams of operation mode selection.
Figure 20, there are four types of works for single hose Multiple coil time sharing power supply isolation flyback cycle changing type single-stage multi input inverter tool
The output voltage of operation mode selection, input current instantaneous value SPWM principal and subordinate's power distribution energy management control principle oscillograms.
Figure 21, there are four types of works for multitube Multiple coil time sharing power supply isolation flyback cycle changing type single-stage multi input inverter tool
The output voltage of operation mode selection, input current instantaneous value SPWM principal and subordinate's power distribution energy management control principle oscillograms.
Figure 22 has output terminal and connects the Multiple coil time sharing power supply isolation flyback week of single-stage isolated Bidirectional charging-discharging converter
Wave conversion type single-stage multi input autonomous power supply system.
Figure 23 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 24, the output voltage u of autonomous power supply systemo, output current iLfWith output inductor iLf' waveform.
Specific embodiment
With reference to the accompanying drawings of the specification and embodiment is described further technical scheme of the present invention.
Flyback cycle changing type single-stage multi input inverter is isolated in Multiple coil time sharing power supply, is by a multiple input single output
Storage transformer by multiple mutually isolated, with input filter high-frequency inverter circuits and one it is shared output week
The connection of wave conversion filter circuit is formed, each input terminal and each high-frequency inverter circuit of multiple input single output storage transformer
Output terminal correspond connection, the output terminal of multiple input single output storage transformer and all wave conversion filter circuits of output
Frequency converter input terminal is connected, described each high-frequency inverter circuit with input filter by input filter,
Bidirectional power flow single-input single-output high-frequency inverter circuit sequentially cascades composition, and described output week wave conversion filter circuit is by week
Wave converter, output filter sequentially cascade composition, each bidirectional power flow single-input single-output high-frequency inverter circuit
It is made of four-quadrant high frequency power switch and two quadrant high frequency powers switch or is only made of four-quadrant high frequency power switch,
The frequency converter is switched by the four-quadrant high frequency power that can bear bi-directional voltage stress and bidirectional current stress and formed, institute
State the multiple input source of inverter within a HF switch period timesharing to load supplying.
The Multiple coil time sharing power supply isolation functional block diagram of flyback cycle changing type single-stage multi input inverter, circuit structure,
The output voltage instantaneous value SPWM control single hoses for operating mode selection that there are four types of tools and multitube inverter steady principle waveform,
Respectively as shown in FIG. 4,5,6, 7.In Fig. 4,5,6,7, Ui1、Ui2、…、UinFor n roads input direct-current voltage source, (n is oneself more than 1
So number), ZL、uoRespectively single phase passive load and single phase ac power grid, uo、ioRespectively single-phase output alternating voltage with exchange
Electric current.Each high-frequency inverter circuit mutually isolated, with input filter is defeated by input filter, bidirectional power flow list
Enter single output high-frequency inverter circuit and sequentially cascade composition, wherein bidirectional power flow single-input single-output high-frequency inverter circuit is by four-quadrant
Limit for height frequency power switch and two quadrant high frequency powers switch are formed or are only made of four-quadrant high frequency power switch, can be selected
MOSFET, IGBT, GTR constant power device；The all wave conversion filter circuits of output are sequentially cascaded by frequency converter, output filter
It forms, wherein frequency converter is the four-quadrant high frequency that bi-directional voltage stress, bidirectional current stress can be born by one or two
Power switch is realized；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.N roads high-frequency inverter circuit is by n roads input direct-current voltage source Ui1、Ui2、…、UinAmplitude is modulated into be distributed by sinusoidal envelope line
Unipolarity tri-state multi slope SPWM current waves iN11+iN21+…+iNn1, through storage transformer T isolation and frequency converter solution
It is tuned into the unipolarity tri-state single-slope SPWM current waves i that amplitude is distributed by sinusoidal envelope lineN2(iN2++iN2-), through exporting filtered electrical
Obtain the sinusoidal voltage u of high quality after appearance on the net in single phase ac passive load or single-phase alternating currentoOr sinusoidal ac
Flow io, n input pulse electric current of n roads high-frequency inverter circuit 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 smooth input direct-current electric current Ii1、Ii2、…、Iin。
It should be added that the former and deputy side winding voltage with multiple levels u of half bridge circuit storage transformerN11、uN21、…、uNn1、uN2
Amplitude should be the 1/2 of the voltage magnitude indicated in Fig. 6,7；The electric current i of each primary side winding of storage transformerN11、
iN21、…、iNn1The rate of rise be respectively Ui1/L11、Ui2/L21、…、Uin/Ln1It is (single hose, push-pull type, push-pull ortho-exciting formula, complete
Bridge circuit) or Ui1/(2L11)、Ui2/(2L21)、…、Uin/(2Ln1) (half bridge circuit), unipolarity tri-state list level SPWM electricity
Flow wave iN2(iN2++iN2) lower liter of slope be-uo/L2, wherein L11、L21、…、Ln1And L2Respectively storage transformer n is former
The inductance of side winding and the inductance of vice-side winding.
Multiple coil time sharing power supply isolation flyback cycle changing type single-stage multi input inverter belongs to voltage boosting/reducing inverter, n
A input source is to load Parallel Time-sharing power supply.Its principle be equivalent to the magnetic flux that multiple input source generates in storage transformer or
In the superposition for the voltage that output terminal generates, i.e. output voltage uoWith input direct-current voltage (Ui1、Ui2、…、Uin), energy storage type transformation
The device turn ratio (N2/N11、N2/N21、…、N2/Nn1), the duty ratio (d of n roads input source1、d2、…、dn) between relationship be uo=
(d1Ui1N2/N11+d2Ui2N2/N21+…+dnUinN2/Nn1)/[1-(d1+d2+…+dn)].For appropriate duty ratio (d1、d2、…、
dn) and the storage transformer turn ratio (N2/N11、N2/N21、…、N2/Nn1), uoIt can be greater than, equal to or less than input direct-current voltage
The sum of Ui1+Ui2+…+Uin, the storage transformer in the inverter not only plays the security reliability for improving invertor operation
And Electro Magnetic Compatibility, it is often more important that play the role of matched output voltage and input voltage, that is, realize the defeated of inverter
Go out voltage to be higher than, equal to or less than the sum of input direct-current voltage Ui1+Ui2+…+UinTechnique effect, application range obtains
It widens significantly.As 0.5 ＜ d1+d2+…+dn1 or 0 ＜ d of ＜1+d2+…+dnDuring ＜ 0.5, it is respectively present uo＞ Ui1N2/N11+Ui2N2/
N21+…+UinN2/Nn1Or uo＜ Ui1N2/N11+Ui2N2/N21+…+UinN2/Nn1, i.e. output voltage uoHigher or lower than input direct-current
Voltage (Ui1、Ui2、…、Uin) and the storage transformer turn ratio (N2/N11、N2/N21、…、N2/Nn1) sum of products Ui1N2/N11+
Ui2N2/N21+…+UinN2/Nn1；Since the inverter belongs to single stage circuit structure, storage transformer has multiple primary winding
With an auxiliary winding, therefore by this kind of inverter be known as Multiple coil time sharing power supply isolation flyback cycle changing type single-stage multi input inversion
Device.For storage transformer there are two kinds of working methods of high frequency magnetic reset and low frequency magnetic reset, the former is storage transformer one
Magnetic-reset is realized in a HF switch period, DCM patterns are operated in and using constant frequency SPWM due to power not reversible flowing
Control strategy, no audio noise, belongs to annulus inverter in high frequency；The latter is storage transformer within an output low frequency period
It realizes magnetic-reset, be operated in CCM patterns and use constant frequency SPWM control strategies, have audio noise, it is inverse to be not belonging to high frequency link
Become device.N input source of the inverter within a HF switch period can only timesharing to output AC load power supply, duty ratio
It can identical (d1=d2=...=dn), it can also be different (d1≠d2≠…≠dn)。
Flyback cycle changing type single-stage multi input inverter is isolated in Multiple coil time sharing power supply of the present invention, due to sharing
One storage transformer and all wave conversion filter circuits of an output, are formed with DC converter and inverter two-stage cascade
There is differences substantially for the circuit structure of traditional multi input inverter.Therefore, inverter of the present invention has novelty
And creativeness, and with output and input electrical isolation, multi input power supply not altogether or altogether, the timesharing of multi input power supply supplies
Electricity, circuit topology are succinct, single-stage power conversion, buck than it is big, change range of input voltage is wide, input voltage prepare it is flexible,
Reliability is high when conversion efficiency height (meaning that energy loss is small), load short circuits, output capacity is small, at low cost, application prospect is wide
The features such as general, is a kind of ideal energy-saving type single-stage multi input inverter, energy-saving, economizing type society is built vigorously advocating
Today of meeting, with more important value.
Multiple coil time sharing power supply isolation flyback cycle changing type single-stage multi input inverter circuit topology race embodiment, such as schemes
8th, shown in 9,10,11,12,13,14,15,16,17.Fig. 8, single hose circuit shown in 9 be can bear bi-directional voltage by n+2 should
Power, the four-quadrant high frequency power of bidirectional current stress switch realize that push-pull circuit shown in Figure 10-11 pushes away shown in Figure 12-13
Bi-directional voltage stress, bidirectional current stress can be born by 2n+1 by drawing half bridge circuit shown in positive activation type circuit and Figure 14-15
Four-quadrant high frequency power switch and realize, Figure 16, full bridge circuit shown in 17 be by 2n+1 can bear bi-directional voltage stress,
The four-quadrant high frequency power switch and 2n two quadrants that can bear unidirectional voltage stress, bidirectional current stress of bidirectional current stress
High frequency power switchs to realize.It should be added that in Fig. 8, single hose circuit shown in 9 frequency converter two four-quadrants
Limit for height frequency power switch is to split into two two quadrant high frequency powers switches according to each four-quadrant high frequency power switch to come picture, figure
A four-quadrant high frequency power of frequency converter in push-pull type shown in 10-17, push-pull ortho-exciting formula, semibridge system, full bridge circuit
Switch is also to split into two two quadrant high frequency powers switches to carry out picture, is identical in principle；Fig. 8, the electricity of single hose shown in 9
The storage transformer on road is provided with two vice-side windings, and each vice-side winding works half of output voltage period respectively, when defeated
Go out filter capacitor CfWith load impedance ZLParallel equivalent impedance power switch S when being purely resistive32、S42It can be taken with diode
Generation；Circuit shown in Fig. 8-17 gives input filter as (the input filter of half bridge circuit shown in Figure 14-15 of LC wave filters situation
Wave capacitance is two bridge arm capacitance C1、C2), circuit when not providing input filter as space is limited as capacitive filter situation；Figure
16th, circuit shown in 17 need not be switched all using four-quadrant high frequency power, eliminate 2 two quadrant high frequency powers switches.Mostly around
The power switching voltage stress of group time sharing power supply isolation flyback cycle changing type single-stage multi input inverter topology embodiment, such as table
Shown in 1.In table 1, UN11max=max (Ui1, Ui2N11/N21..., UinN11/Nn1)、UN21max=max (Ui1N21/N11, Ui2...,
UinN21/Nn1)、…、UNn1max=max (Ui1Nn1/N11, Ui2Nn1/N21..., Uin)、UN2max=max (Ui1N2/N11, Ui2N2/
N21..., UinN2/Nn1)、UoTo export sinusoidal voltage uoVirtual value.Single hose circuit topology, power shown in Fig. 8,9 are opened
Close S10、S20、…、Sn0Voltage stress be respectivelyWork(
Rate switchs S31、S41Voltage stress bePower switch S32、S42Voltage stress beSingle hose,
Push-pull type, push-pull ortho-exciting formula circuit are suitable for small-power low pressure and input inversion occasion, and semibridge system, full bridge circuit are suitable for small work(
Rate high input voltage inversion occasion.The circuit topology race is suitable for changing multiple input dc power bucklings altogether, unstable into one
Voltage swing needed for a stablizes good output alternating current, can be used to realize new with excellent performance and wide application prospect
The a variety of new energy distributed power supply systems of type single-stage, as photovoltaic cell 40-60VDC/220V50HzAC or 115V400HzAC,
Proton Exchange Membrane Fuel Cells 85-120V/220V50HzAC or 115V400HzAC, middle-size and small-size family wind-power electricity generation 24-36-
48VDC/220V50HzAC or 115V400HzAC, large-scale wind generating 510VDC/220V50HzAC or 115V400HzAC
Multiple input sources is waited to power AC load or AC network.
The work(of 1 Multiple coil time sharing power supply of table isolation flyback cycle changing type single-stage multi input, eight kinds of topological embodiments of inverter
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.Multiple coil time sharing power supply isolation flyback week wave conversion
The energy management control strategy of type single-stage multi input inverter need to be provided simultaneously with energy management, photovoltaic cell and the wind of input source
MPPT, output voltage (electric current) the control three zones of the new energy equipments such as power generator, also need to consider accumulator sometimes
Charge and discharge control and system under different powering modes smooth and seamless switching.Multiple coil time sharing power supply isolation flyback cycle becomes
Single-stage of remodeling multi input inverter uses two different energy management modes：(1) energy management modes I-- principals and subordinates power distribution
Mode, 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, 2 ...,
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, load required deficiency
Power can be not required to addition batteries to store energy equipment by being provided from the n-th road of power supply unit input source；(2) energy management modes
II-maximum power output mode, the 1st, 2 ..., n roads input source with maximum power output to load, eliminate accumulator storage
Energy equipment, realizes the requirement that grid-connected system makes full use of the energy, if in output terminal and connecing an accumulator cell charging and discharging
Device can also be achieved the stabilization of autonomous power supply system output voltage (electric current).When n roads new energy input voltage to timing, pass through
Control the 1st, 2 ..., the input current of n roads input source, be equivalent to control the 1st, 2 ..., the input power of n roads input source.
Magnetic-reset is realized within an output low frequency period with storage transformer, is operated in CCM patterns and using permanent
For frequency SPWM control strategies, the energy management control strategy of this kind of inverter is discussed.Multiple coil time sharing power supply isolation flyback week
Wave conversion type single-stage multi input inverter is using output voltage of the tool there are four types of operating mode selection, input current instantaneous value SPWM
Principal and subordinate's power distribution energy management control strategy, to form autonomous power supply system；Or there are four types of operating mode selections using tool
Input current instantaneous value SPWM maximum power output energy management control strategies, to form grid-connected system.1st, 2 ..., n-
The output voltage for the deficit power that 1 road input source output power is fixed and the n-th road input source supplement load is required, input current wink
Duration SPWM principals and subordinates power distribution energy management control block diagram and control principle waveform, respectively as shown in Figure 18,19,20,21.Figure
18th, 20 control program for single hose circuit topology, Figure 19,21 control program for multitube circuit topology, the two is in essence
On be similar；In Figure 20,21, output filter capacitor CfWith loading ZLParallel equivalent impedance in perception, secondary winding current
Fundametal compoment iN21Lag behind output voltage uo.The basic thought of the control program is that the operating mode of inverter presses output voltage
uoWith secondary winding current iN21Polarity be divided into four kinds of A, B, C, D, each operating mode is equivalent to a flyback direct current and becomes
Parallel operation；N roads high-frequency inverter circuit is by n roads input direct-current voltage source Ui1、Ui2、…、UinAmplitude is modulated into be distributed by sinusoidal envelope line
Unipolarity tri-state multi slope SPWM current waves iN11+iN21+…+iNn1, the 1st, 2 ..., the timesharing of n-1 roads power switch conducting when
Between be the product according to error current size and output voltage error signal to turn-on time total in a HF switch period
TonBe allocated (realize the 1st, 2 ..., the maximum power output of n-1 roads input source), distribute the remaining time as the n-th road power
The turn-on time (realizing supplying for the n-th tunnel input source power) of switch, demodulates through storage transformer isolation and frequency converter
The unipolarity tri-state single-slope SPWM current waves i of sinusoidal envelope line distribution is pressed into amplitudeN2Or iN2++iN2-, height is obtained after filtered
The sinusoidal voltage u of qualityoOr simple sinusoidal alternating current io；The duty ratio size i.e. total by adjusting output voltage error signal
Realize the stabilization of inverter output voltage, which is suitable for circuit shown in Fig. 8-17.1st, 2 ..., n-1 roads input
Source obtains reference current signal I after maximum power point calculates* i1r、I* i2r、…、I* i(n-1)r, inverter the 1st, 2 ..., n-1 roads
Input current feedback signal Ii1f、Ii2f、…、Ii(n-1)fRespectively with the 1st, 2 ..., n-1 roads reference current signal Ii1r、
Ii2r、…、Ii(n-1)rCurrent error amplified signal I is obtained after proportional and integral controller1e、I2e、…、I(n-1)e, inverter it is defeated
Go out voltage feedback signal uofWith reference sinusoidal voltage urCompare amplification through proportional and integral controller and obtain voltage error amplified signal
ue, current error amplified signal I1e、I2e、…、I(n-1)eRespectively with voltage error amplified signal ueMutually multiplied i1e、i2e、…、
i(n-1)eAnd its inversion signal-i1e、-i2e、…、-i(n-1)e, then i1e、i2e、…、i(n-1)e、ue、-i1e、-i2e、…、-
i(n-1)e、-ueRespectively with unipolarity saw-toothed carrier ucCompare, consider output voltage, output error voltage polarity selection signal
And the power switch control signal u of Fig. 8, single hose circuit topology shown in 9 is obtained after appropriate combinational logic circuitgs10、
ugs20、…、ugsn0、ugs31、ugs32、ugs41、ugs42Or the power switch control signal of multitube circuit topology shown in Figure 10-17
ugs11(ugs14)、ugs21(ugs24)、…、ugsn1(ugsn4)、ugs12(ugs13)、ugs22(ugs23)、…、ugsn2(ugsn3)、ugs3、ugs4。
As bearing power PoMore than the 1st, 2 ..., the sum of the maximum power of n-1 roads input source when, output voltage uoReduce, voltage regulator
Output voltage ueVirtual value be more than threshold comparative level UtAnd I1e、I2e、…、I(n-1)eZero is all higher than, diode D1、D2、…、
Dn-1Block, the 1st, 2 ..., n-1 roads current regulator independently work with the n-th road voltage regulator, i.e. Ii1r=I* i1r、Ii2r
=I* i2r、…、Ii(n-1)r=I* i(n-1)r, the 1st, 2 ..., n-1 roads current regulator be used to implement the 1st, 2 ..., n-1 roads input source
Maximum power output, the n-th road voltage regulator is used to implement the stabilization of inverter output voltage, and the input source timesharing of n roads is to negative
Carry power supply；As bearing power PoLess than the 1st, 2 ..., the sum of the maximum power of n-1 roads input source when, output voltage uoIncrease, when
Regulated output voltage ueVirtual value be reduced to threshold comparative level UtWhen following, diode Dn-1Conducting, D1、D2、…、
Dn-2It still blocks, stagnant ring comparison circuit n+1 exports low level, and the n-th road input source stops power supply, voltage regulator and current regulation
Device form double closed-loop control system, the 1st, 2 ..., the timesharing in a switch periods of n-1 roads input source power to the load, electric current
The reference current I of adjusteri(n-1)rReduce, i.e. Ii(n-1)r＜ I* i(n-1)r, the (n-1)th road input source output power, which reduces, (to be operated in
Non- maximum functional point), the n-th road input source output power is reduced to zero, inverter output voltage uoIt tends towards stability.When input voltage or
During load variation, by adjusting urOr uofChange error voltage signal ueWith error current signal i1e、i2e、…、i(n-1)e, so as to
Change modulation degree duty ratio d1、d2、…、dn, therefore can realize the tune of the inverter output voltage, input current (output power)
Section is with stablizing.
Figure 20, control principle waveform has marked HF switch cycle T shown in 21S, a certain HF switch cycle TSInterior 1st,
2nd ..., the turn-on time T of n roads input sourceon1、Ton2、…、TonnWith total turn-on time Ton=Ton1+Ton2+…+TonnAnd four
Kind of operating mode A, B, C, D, total turn-on time TonWithin an output voltage period changed by sinusoidal rule, CfWith ZL
Parallel equivalent impedance in perception, capacitive, it is resistive when inverter operating mode sequence respectively A-B-C-D, D-C-B-A, A-
C.In addition, for half bridge circuit shown in Figure 14,15, it should be by half of input direct-current voltage value (Ui1/2、Ui2/2、…、Uin/ 2) generation
Enter into voltage transfer ratio formula and calculated.
During energy forward direction is transmitted and energy-storage transformer releases energy to output terminal, need to avoid push-pull type, push-pull ortho-exciting formula,
There is low-impedance path in semibridge system, full bridge circuit primary side, then the turn ratio of storage transformer must satisfyWork as energy
Amount feeds back to the 1st road input dc power source U from output AC load sidei1When, it needs to avoid push-pull type, push-pull ortho-exciting formula, half
There is positive activation type working condition in bridge-type, full bridge circuit, i.e. the turn ratio of storage transformer must satisfy
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 22.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 23.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 24.For output filter capacitor Cf、Cf' and load ZLFor, Multiple coil time sharing power supply isolation flyback cycle changing type
The output terminal of single-stage multi input inverter and single-stage isolated Bidirectional charging-discharging converter simultaneously connects the parallel connection for being equivalent to two current sources
Superposition.The energy management control strategy as shown in Figure 23 is it is found that how defeated Multiple coil time sharing power supply isolation flyback cycle changing type single-stage is
Enter the output current i of inverterLfFundametal compoment and output voltage uoWith the same phase of frequency, active power of output；Charge/discharge transformation device
It is by output voltage uoWith reference voltage uorefError amplification signal uoeIt is handed over high frequency carrier and cuts generation SPWM signal progress
Control, output inductor electric current iLf' and uoBetween there are phase difference θ, different phase difference θs mean export different size
With the active power in direction.Work as Po=P1max+P2max+…+PnmaxWhen, θ=90 °, charge/discharge transformation device output active power be
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. flyback cycle changing type single-stage multi input inverter is isolated in a kind of Multiple coil time sharing power supply, it is characterised in that：It is this inverse
It is by the storage transformer of a multiple input single output that multiple mutually isolated, with input filter high frequencies are inverse to become device
Become circuit and a shared output week wave conversion filter circuit connection formed, multiple input single output storage transformer it is each
Input terminal couples with the output terminal one-to-one correspondence of each high-frequency inverter circuit, the output terminal of multiple input single output storage transformer
It is connected with the frequency converter input terminal of all wave conversion filter circuits of output, each high frequency for carrying input filter
Inverter circuit is sequentially cascaded and is formed by input filter, bidirectional power flow single-input single-output high-frequency inverter circuit, described
The all wave conversion filter circuits of output are sequentially cascaded and are formed by frequency converter, output filter, each bidirectional power flow
Single-input single-output high-frequency inverter circuit is made of or only four-quadrant high frequency power switch and two quadrant high frequency powers switch
It is made of four-quadrant high frequency power switch, the frequency converter is by that can bear bi-directional voltage stress and bidirectional current stress
Four-quadrant high frequency power switch is formed, and the timesharing within a HF switch period of the multiple input source of the inverter supplies load
Electricity.
2. flyback cycle changing type single-stage multi input inverter is isolated in Multiple coil time sharing power supply according to claim 1,
It is characterized in that：The circuit topology of the Multiple coil time sharing power supply isolation flyback cycle changing type single-stage multi input inverter is single tube
Formula, push-pull type, push-pull ortho-exciting formula, semibridge system, full bridge circuit.
3. flyback cycle changing type single-stage multi input inverter is isolated in Multiple coil time sharing power supply according to claim 1,
It is characterized in that：The output terminal of Multiple coil time sharing power supply isolation flyback cycle changing type single-stage multi input inverter simultaneously connects one
The single-stage isolated Bidirectional charging-discharging converter of energy storage device, to form the autonomous power supply system of an output voltage stabilization；It is described
Single-stage isolated Bidirectional charging-discharging converter by input filter, high-frequency inverter, high frequency transformer, frequency converter, output
Wave filter sequentially cascades composition, and the frequency converter is by that can bear the four-quadrant of bi-directional voltage stress and bidirectional current stress
High frequency power switch is formed；Multiple input source is operated in maximum power output mode, according to bearing power and multiple input source
The relative size of the sum of maximum power controls the power flow size and Orientation of single-stage isolated Bidirectional charging-discharging converter in real time, realizes
System output voltage is stablized and the smooth and seamless of energy storage device charge and discharge switches.
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| CN109245589A (en) * | 2018-10-10 | 2019-01-18 | 青岛大学 | Three port integrated inverse device of single-stage three-phase high gain boost type |
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Application publication date: 20180622 |