CN108023495A - The non-isolated inverter of external Parallel Time-sharing selecting switch voltage-type single-stage multi input - Google Patents

The non-isolated inverter of external Parallel Time-sharing selecting switch voltage-type single-stage multi input Download PDF

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Publication number
CN108023495A
CN108023495A CN201810019769.6A CN201810019769A CN108023495A CN 108023495 A CN108023495 A CN 108023495A CN 201810019769 A CN201810019769 A CN 201810019769A CN 108023495 A CN108023495 A CN 108023495A
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output
input
circuit
voltage
power
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陈道炼
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Qingdao University
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Qingdao University
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48Conversion 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
    • H02M7/493Conversion 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
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381Dispersed generators
    • H02J3/382Dispersed generators the generators exploiting renewable energy
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381Dispersed generators
    • H02J3/387Dispersed generators using fuel cells
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48Conversion 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
    • H02M7/501Conversion 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 sinusoidal output voltages being obtained by the combination of several pulse-voltages having different amplitude and width
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48Conversion 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
    • H02M7/53Conversion 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
    • H02M7/537Conversion 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
    • H02M7/5387Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • H02M7/53871Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/0067Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H02M1/007Plural converter units in cascade
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/0083Converters characterised by their input or output configuration

Abstract

The present invention relates to a kind of non-isolated inverter of external Parallel Time-sharing selecting switch voltage-type single-stage multi input, its circuit structure is to be made of multiple input filters and a shared output 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 is corresponded with the output terminal of each input filter to be coupled, and the output terminal of multiple input single output high-frequency inverter circuit and the input terminal of output filter circuit are connected.This inverter has the characteristics that multiple input sources altogether and time sharing power supply, output and input are not isolated from, it is succinct to share output filter circuit, circuit topology, single-stage power conversion, conversion efficiency are high, output voltage ripple is small, application prospect is extensive, to realize that the large-capacity distributing electric power system of a variety of new energy joint power supplies has established key technology.

Description

The non-isolated inverter of external Parallel Time-sharing selecting switch voltage-type single-stage multi input
Technical field
The non-isolated inverter of external Parallel Time-sharing selecting switch voltage-type single-stage multi input 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 There are electrical isolation, the inverter without electrical isolation between input DC power, be referred to as isolated form, non-isolation type inverter. Non-isolation type inverter has the characteristics that circuit structure is succinct, reliability is high, output capacity is big, cost is low, with DC generation Machine, storage battery, photovoltaic cell and fuel cell etc. apply valency for the secondary transformation of electrical energy occasion of main dc power supply 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 to produce core again gives up Reason, 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 change 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 powers to the load with the energy at the same time, improve stability and the flexibility of system, but there are two stage power Conversion, 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, it is necessary to have the new of single stage circuit structure shown in Fig. 3 Type multi input inverter substitutes Fig. 1,2 shown traditional multi inputs with DC converter with inverter two-stage cascade circuit structure Inverter forms new 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.New single-stage new energy distributed power supply system With circuit structure is succinct, single-stage power conversion, multiple input source is at the same time in a HF switch cycle or timesharing is supplied to load Electricity, the advantage such as cost is low.
Therefore, a kind of the single-stage multi input inverter for allowing a variety of new energy to combine power supply and its new energy point are actively sought Cloth electric power system is extremely urgent, and stability and flexibility for improving system, realize that the preferential of new energy utilizes or fill Divide to utilize and be of great significance tool.
The content of the invention
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 It is not isolated between the external Parallel Time-sharing selecting switch of list output high-frequency inverter circuit, output and input, multiple input power supply one Time sharing power supply, circuit topology are succinct in switch periods, it is high to share output filter circuit, single-stage power conversion, conversion efficiency, export How defeated the external Parallel Time-sharing selecting switch voltage-type single-stage for the features such as voltage ripple is small, output capacity is big, application prospect is extensive is Enter non-isolated inverter.
Technical program of the present invention lies in:A kind of external Parallel Time-sharing selecting switch voltage-type single-stage multi input is non-isolated inverse Become device, be to be filtered multiple input filters and a shared output altogether by a multiple input single output high-frequency inverter circuit Wave circuit connection is formed, each input terminal of multiple input single output high-frequency inverter circuit and the output terminal one of each input filter One corresponds to connection, and the output terminal of multiple input single output high-frequency inverter circuit and the input terminal of the output filter circuit are connected; The multiple input single output high-frequency inverter circuit 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, and equivalent to one bidirectional power flow list is defeated at any time Enter single output high-frequency inverter circuit;The external multi-channel parallel timesharing selection four-quadrant power switch circuit per all the way only by One four-quadrant power switch forms and each road output terminal connects together;The output filter circuit is by output inductor Form, or sequentially cascaded and formed by output inductor, output filter capacitor, or by output inductor, output filter capacitor, Output inductor sequentially cascades composition.
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 the external non-isolated inverter circuit structure of Parallel Time-sharing selecting switch voltage-type single-stage multi input and topological race and its Energy management control strategy, the i.e. circuit structure are to select the more of four-quadrant power switch by providing a kind of external Parallel Time-sharing The single output high-frequency inverter circuit of input forms multiple input filters and a shared output filter circuit connection altogether.
The non-isolated inverter of external Parallel Time-sharing selecting switch voltage-type single-stage multi input of the present invention, can will be multiple common Ground, unstable input direct voltage, which are reverse into needed for a load, stablizes good output alternating current, straight with multi input Galvanic electricity source is not isolated from altogether, between multiple input single output high-frequency inverter circuit, export be not isolated from input, multi input power supply one Time sharing power supply, circuit topology are succinct in switch periods, it is high to share output filter circuit, single-stage power conversion, conversion efficiency, export The features such as voltage ripple is small, output capacity is big, application prospect is extensive.External Parallel Time-sharing selecting switch voltage-type single-stage multi input The comprehensive performance of non-isolated inverter, the multi input inverter that will be formed than traditional DC converter and inverter two-stage cascade It is superior.
Brief 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, new single-stage multi input inverter principle block diagram.
Fig. 4, the external non-isolated inverter principle block diagram of Parallel Time-sharing selecting switch voltage-type single-stage multi input.
Fig. 5, the external non-isolated inverter circuit structure chart of Parallel Time-sharing selecting switch voltage-type single-stage multi input.
Fig. 6, the bipolar SPWM control non-isolated inverter of external Parallel Time-sharing selecting switch voltage-type single-stage multi input are steady State principle oscillogram.
Fig. 7, the Unipolar SPWM control non-isolated inverter of external Parallel Time-sharing selecting switch voltage-type single-stage multi input are steady State principle oscillogram.
Fig. 8, the external non-isolated inverter circuit topology example of Parallel Time-sharing selecting switch voltage-type single-stage multi input One ----half bridge circuit schematic diagram I.
Fig. 9, the external non-isolated inverter circuit topology example of Parallel Time-sharing selecting switch voltage-type single-stage multi input Two ----half bridge circuit schematic diagram II.
Figure 10, the external non-isolated inverter circuit topology example of Parallel Time-sharing selecting switch voltage-type single-stage multi input Three ----half bridge circuit schematic diagram III.
Figure 11, the external non-isolated inverter circuit topology example of Parallel Time-sharing selecting switch voltage-type single-stage multi input Four ----full bridge circuit schematic diagram I.
Figure 12, the external non-isolated inverter circuit topology example of Parallel Time-sharing selecting switch voltage-type single-stage multi input Five ----full bridge circuit schematic diagram II.
Figure 13, the external non-isolated inverter circuit topology example of Parallel Time-sharing selecting switch voltage-type single-stage multi input Six ----full bridge circuit schematic diagram III.
Figure 14, the output voltage of the non-isolated inverter of external Parallel Time-sharing selecting switch voltage-type single-stage multi input, input Instantaneous current feedback bipolar SPWM principal and subordinate power distributes energy management control block diagram.
Figure 15, the output voltage of the non-isolated inverter of external Parallel Time-sharing selecting switch voltage-type single-stage multi input, input Instantaneous current feedback bipolar SPWM principal and subordinate power distributes energy management control principle oscillogram.
Figure 16, the output voltage of the non-isolated inverter of external Parallel Time-sharing selecting switch voltage-type single-stage multi input, input Instantaneous current feedback Unipolar SPWM principal and subordinate power distributes energy management control block diagram.
Figure 17, the output voltage of the non-isolated inverter of external Parallel Time-sharing selecting switch voltage-type single-stage multi input, input Instantaneous current feedback Unipolar SPWM principal and subordinate power distributes energy management control principle oscillogram.
Figure 18, has output terminal and connects the external Parallel Time-sharing selecting switch voltage of single-stage isolated Bidirectional charging-discharging converter The non-isolated autonomous power supply system of type single-stage multi input.
Figure 19, 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 20, the output voltage u of autonomous power supply systemoWith output inductor electric current iLf、iLf' waveform.
Embodiment
Technical scheme is described further with reference to Figure of description and embodiment.
The non-isolated inverter of external Parallel Time-sharing selecting switch voltage-type single-stage multi input, is by a multiple input single output High-frequency inverter circuit, which couples multiple input filters and a shared output filter circuit altogether, to be formed, and multi input list is defeated Go out each input terminal of high-frequency inverter circuit with the output terminal one-to-one corresponding of each input filter to couple, multiple input single output is high The output terminal of frequency inverter circuit and the input terminal of the output filter circuit are 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, at any time equivalent to one bidirectional power flow single-input single-output high-frequency inverter circuit;It is 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;The output filter circuit is made of output inductor, or by output inductor, defeated Go out filter capacitor and sequentially cascade composition, or structure is sequentially cascaded by output inductor, output filter capacitor, output inductor Into.
The functional block diagram of the non-isolated inverter of external Parallel Time-sharing selecting switch voltage-type single-stage multi input, circuit structure, Bipolar SPWM controls and the steady principle waveform of Unipolar SPWM control inverter, respectively as shown in FIG. 4,5,6, 7.Fig. 4,5, 6th, in 7, Ui1、Ui2、…、UinFor n roads input dc power potential source (n is the natural number more than 1), ZLFor single-phase output AC load (including single phase ac passive load and the load of single phase ac power grid), uo、ioRespectively single-phase output alternating voltage and alternating current Stream.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 work( Rate stream single-input single-output high-frequency inverter circuit sequentially cascades composition, wherein external multi-channel parallel timesharing selection four-quadrant power On-off 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 work( Rate stream single-input single-output high-frequency inverter circuit is by multiple two quadrants height that can bear unidirectional voltage stress, bidirectional current stress Frequency power switch is formed, and MOSFET, IGBT, GTR constant power device can be selected;In dashed box (" A " is held and " B " end is union end) Output filter is made of output inductor, or is sequentially cascaded and formed by output inductor, output filter capacitor, or by defeated Go out filter inductance, output filter capacitor, output inductor and sequentially cascade composition, outputting inductance, capacitive filter are suitable for nothing Source AC load, outputting inductance wave filter or outputting inductance, capacitance, inductance filter are loaded suitable for AC network;N roads input Wave filter is LC wave filters (the filter inductance L of the dashed box containing additioni1、Li2、…、Lin) or capacitive filter (without addition dashed box Filter inductance Li1、Li2、…、Lin), can be smoother using n roads input direct-current electric current during LC wave filters.The single output high frequency of n inputs is inverse Become circuit by n roads input dc power potential source Ui1、Ui2、…、UinIt is modulated into the bipolarity binary states that amplitude changes with input direct voltage Or the multilevel SPWM voltage wave of unipolarity tri-state, through output inductor Lf, output filter capacitor CfIt is passive in single phase ac afterwards The sinusoidal voltage u of high quality is obtained in loado, or through output inductor LfOr output inductor Lf1, output filtering Capacitance Cf, output inductor Lf2Obtain the simple sinusoidal alternating current i of high quality on the net in single-phase alternating current afterwardso, the single output of n inputs N input pulse electric current of high-frequency inverter circuit is through input filter Li1-Ci1、Li2-Ci2、…、Lin-CinOr Ci1、Ci2、…、Cin Afterwards in n roads input DC power Ui1、Ui2、…、UinIt is middle to obtain smooth input direct-current electric current Ii1、Ii2、…、Iin.Require supplementation with Illustrate, bipolarity binary states and unipolarity tri-state multilevel SPWM voltage wave uAB+ 1 state amplitude be Ui1、Ui2、…、Uin, and- 1 state amplitude is Uin(it is designed as here only by the n-th road input source UinFeedback exchange side energy, is also designed to by other How all the way input source feedback exchange side energy);Half bridge circuit only exists bipolarity binary states multilevel SPWM voltage wave uAB, output + 1 state amplitude and -1 state amplitude during the positive and negative half cycle of voltage should all be multiplied by 1/2.
The non-isolated inverter of external Parallel Time-sharing selecting switch voltage-type single-stage multi input belongs to voltage-dropping type inverter, and n is a Input source is to load Parallel Time-sharing power supply.If the output signal I of n-1 input source error amplifier1e、I2e、…、I(n-1)eWith it is defeated Go out the output signal u of voltage error amplifiereAmplitude be I1em、I2em、I(n-1)em、Uem, saw-toothed carrier signal ucAmplitude be Ucm, then corresponding modulation degree is m1=I1em/Ucm、m2=I2em/Ucm、…、mn=Uem/Ucm, and have 0 < m1、m2、…、mn< 1 And m1< m2< ... < mn.The principle of the inverter equivalent to multiple voltage-type single input inverters output end voltage superposition, That is output voltage uoWith input direct voltage (Ui1、Ui2、…、Uin), modulation degree (m1、m2、…、mn) between relation be uo= (m1Ui1+(m2-m1)Ui2+…+(mn-mn-1)Uin) (Unipolar SPWM control) or uo=(2m1-1)Ui1+(2m2-2m1-1)Ui2+… +(2mn-2mn-1-1)Uin) (bipolar SPWM control).Since there are 0 < m1+(m2-m1)+…+(mn-mn-1) 1 (unipolarities of < SPWM is controlled) and 0.5 < m1+(m2-m1)+…+(mn-mn-1) < 1 (bipolar SPWM control), so uo< Ui1+Ui2+…+Uin, That is output voltage uoAlways less than the sum of input direct voltage Ui1+Ui2+…+Uin;Since the inverter belongs to single-level circuit knot Structure, multi-channel parallel timesharing selection four-quadrant power switch are located at outside high-frequency inverter circuit, therefore this kind of inverter is referred to as external The non-isolated inverter of Parallel Time-sharing selecting switch voltage-type (voltage-dropping type) single-stage multi input.N input source of the inverter is one In a HF switch cycle can only timesharing to output AC load power supply, modulation degree can identical (m1=m2=...=mn), also may be used With difference (m1≠m2≠…≠mn)。
The non-isolated inverter of external Parallel Time-sharing selecting switch voltage-type single-stage multi input of the present invention, due to sharing One bidirectional power flow single-input single-output high-frequency inverter circuit and an output filter circuit, with DC converter and inverter There is difference substantially for the circuit structure for traditional multi input inverter that two-stage cascade is formed.Therefore, it is of the present invention inverse Becoming utensil has novelty and creativeness, and is not isolated from output with input, the letter of multi input power supply time sharing power supply, circuit topology Clean, single-stage power conversion, conversion efficiency high (meaning that energy loss is small), output voltage ripple is small, output capacity is big, cost Low, the advantages that application prospect is extensive, be a kind of preferably energy-saving type single-stage multi input inverter, section built vigorously advocating Energy type, today of conservation-minded society, with more important value.
The external non-isolated inverter circuit topology race embodiment of Parallel Time-sharing selecting switch voltage-type single-stage multi input, such as schemes 8th, shown in 9,10,11,12,13.In circuit shown in Fig. 8-13, external multi-channel parallel timesharing selection four-quadrant power switch circuit Bi-directional voltage stress can be born by n, the four-quadrant high frequency power of bidirectional current stress is switched and formed, and bidirectional power flow list The single output high-frequency inverter circuit of input is then by multiple two quadrant high frequency powers that can bear unidirectional voltage stress, bidirectional current stress (half bridge circuit shown in Fig. 8,9,10 is made of switch composition 2 two quadrant high frequency powers switches, full-bridge shown in Figure 11,12,13 Formula circuit is made of 4 two quadrant high frequency powers switches).It should be added that circuit shown in Fig. 8-13 gives input Wave filter is that (input filter capacitor of half bridge circuit shown in Fig. 8,9,10 is two bridge arm capacitance C to LC wave filters situation1、C2), Circuit when input filter is capacitive filter situation is not provided as space is limited;Half bridge circuit shown in Fig. 8,9,10 is only applicable in In the of substantially equal situation of n input supply voltage;The output filter difference of half bridge circuit I, II, III shown in Fig. 8,9,10 For output L wave filters, output LC wave filters, output LCL filter, full bridge circuit I, II, III shown in Figure 11,12,13 it is defeated It is respectively to export L wave filters, output LC wave filters, output LCL filter to go out wave filter.External Parallel Time-sharing selecting switch voltage The topological embodiment power switching voltage stress of two kinds of the non-isolated inverter of type single-stage multi input, as shown in table 1.In table 1, Uimax= max(Ui1, Ui2..., Uin), N=1,2 ..., n.Half bridge circuit is suitable for middle low power high input voltage inversion occasion, full-bridge type Circuit is suitable for high-power high voltage input inversion occasion.The circuit topology race is suitable for multiple inputs altogether, unstable is straight Galvanic electricity buckling changes a required voltage swing into, stablizes good output alternating current, can be used to realize with excellent performance and wide The a variety of new energy distributed power supply systems of sigle-stage AC of general application prospect, such as photovoltaic cell 400-500VDC/220V50HzAC The multiple input sources such as or 115V400HzAC, large-scale wind generating 510VDC/220V50HzAC or 115V400HzAC are negative to exchanging Carry or AC network is powered.
The topological embodiment power of two kinds of the non-isolated inverter of the external Parallel Time-sharing selecting switch voltage-type single-stage multi input of table 1 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 cycles are controlled, that is, there are multiple controls The free degree, 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 the non-isolated inverter of multi input, 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 storage battery sometimes Charge and discharge control and system under different powering modes smooth and seamless switching.External Parallel Time-sharing selecting switch voltage-type list The level non-isolated inverter of multi input uses two kinds of different energy management modes:(1) energy management modes I-- principals and subordinates power distributes 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, 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 storage battery 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 realize 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.
The non-isolated inverter of external Parallel Time-sharing selecting switch voltage-type single-stage multi input, using output voltage, input electricity Instantaneous values feedback bipolar SPWM, Unipolar SPWM principal and subordinate power distribution energy management control strategy are flowed, it is independently-powered to form System;Or using input current instantaneous values feedback bipolar SPWM, Unipolar SPWM maximum power output energy management control plan Slightly, to form grid-connected system.1st, 2 ..., n-1 roads input source output power is fixed and the n-th road input source supplement load institute Output voltage, input current instantaneous values feedback bipolar SPWM, the Unipolar SPWM principal and subordinate power distribution energy of the deficit power needed Buret manages control block diagram and control principle waveform, respectively as shown in Figure 14,15,16,17.Inverter the 1st, 2 ..., n-1 roads it is defeated Enter current feedback signal Ii1f、Ii2f、…、Ii(n-1)fRespectively with the 1st, 2 ..., n-1 roads input source is after maximum power point calculates The reference current signal I arrivedi1r、Ii2r、…、Ii(n-1)rCompare amplification through proportional and integral controller, the error signal I being exaggerated1e、 I2e、…、I(n-1)eBe multiplied respectively with sinusoidal synchronizing signal again through absolute value circuit 1,2 ..., after n-1 ︱ i1e︳, ︳ i2e︱ ..., ︳ i(n-1)e︱, inverter output voltage feedback signal uofWith reference sinusoidal voltage urCompare amplification through proportional and integral controller, amplify Error signal ue︱ u are obtained after absolute value circuit ne︳, ︱ i1e︳, ︳ i2e︱ ..., ︳ i(n-1)e︱, ︱ ue︳ respectively with saw-toothed carrier ucHand over and cut and consider that output voltage gating signal obtains the control signal u of power switch after appropriate combinational logic circuitgss1、 ugss2、…、ugssn、ugs1、ugs2、ugs3、ugs4.1st, 2 ..., n-1 roads current regulator and the n-th road voltage regulator independently Work, the 1st, 2 ..., n-1 roads current regulator be used for realization the 1st, 2 ..., the maximum power output of n-1 roads input source, the n-th tunnel Voltage regulator is used for realization the stabilization of inverter output voltage, and n roads input source, which is combined, to power to the load.When input voltage or negative When carrying change, by adjusting reference voltage urWith reference current ii1r、ii2r、…、ii(n-1)r, or adjust feedback voltage uofAnd feedback Electric current ii1f、ii2f、…、ii(n-1)fTo change error voltage signal ︱ ue︳ and error current signal ︱ i1e︳, ︳ i2e︱ ..., ︳ i(n-1)e︱, so as to change modulation degree m1、m2、…、mn, therefore can realize the inverter output voltage, input current (output power) Adjusting and stabilization.
Carry out control input electric current when the n-th roads of Figure 14-17 Zhong input source is designed as input current feedback, then constitute defeated Enter instantaneous current feedback bipolar SPWM, Unipolar SPWM maximum power output energy management control strategy.Inverter the 1st, 2nd ..., the input current feedback signal I on n roadsi1f、Ii2f、…、IinfRespectively with the 1st, 2 ..., n roads input source is through maximum power point The reference current signal I obtained after calculatingi1r、Ii2r、…、IinrCompare amplification, error amplification signal through proportional and integral controller I1e、I2e、…、IneBe multiplied respectively with sinusoidal synchronizing signal through absolute value circuit 1,2 ..., after n ︱ i1e︳, ︳ i2e︱ ..., ︳ ine︱, ︱ i1e︳, ︳ i2e︱ ..., ︳ ine︱ respectively with saw-toothed carrier ucHand over and cut and consider output voltage gating signal through appropriate group The control signal u of power switch is obtained after combinational logic circuitgss1、ugss2、…、ugssn、ugs1、ugs2、ugs3、ugs4.1st, 2 ..., n Road current regulator independently works, and is used to realize the maximum power output of respective input source, and n roads input source is combined to negative Carry power supply.
Figure 15, bipolarity shown in 17, Unipolar SPWM control principle waveform have marked HF switch cycle TSWith a certain height Frequency switch periods TSInterior 1st, 2 ..., the ON time T of n roads input sourceon1、Ton2、…、TonnAnd total ON time Ton= Ton1+Ton2+…+Tonn, total ON time TonWithin an output voltage cycle changed by sinusoidal rule.In addition, for Half bridge circuit I, II, III shown in Fig. 8,9,10, should be by half of input direct voltage value (Ui1/2、Ui2/2、…、Uin/ 2) substitute into Calculated into voltage transfer ratio formula.
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 need to configure energy storage device, to realize the stabilization of output voltage, i.e., inverter output terminal and connect one Single-stage isolated Bidirectional charging-discharging converter, as shown in figure 18.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 transmit (energy storage device electric discharge), back transfer (energy storage device charging) energy is positive When, a single-stage high frequency link DC-AC converter and a single-stage high frequency link AC-DC converter are equivalent to 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 19.As bearing power Po=UoIoMore than the maximum in multiple input source The sum of power P1max+P2max+…+PnmaxWhen, the energy storage device such as storage battery, super capacitor is 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 20.For output filter capacitor Cf、Cf' and load ZLFor, external Parallel Time-sharing selecting switch voltage-type single-stage is more Input the output terminal of non-isolated inverter and single-stage isolated Bidirectional charging-discharging converter and connect the parallel connection equivalent to two current sources Superposition.As shown in Figure 19 energy management control strategy understand, external Parallel Time-sharing selecting switch voltage-type single-stage multi input it is non-every From the output inductor electric current i of inverterLfWith output voltage uoWith the same phase of frequency, active power of output;Charge/discharge transformation device is Pass through output voltage uoWith reference voltage uorefError amplification signal uoeA section generation SPWM signals are handed over to be controlled with high frequency carrier System, its output inductor electric current iLf' and uoBetween there are phase difference θ, out of phase difference θ means to export different size and side To active power.Work as Po=P1max+P2max+…+PnmaxWhen, θ=90 °, the active power of charge/discharge transformation device output is zero, place In light condition;Work as Po>P1max+P2max+…+PnmaxWhen, uoReduce, 90 ° of θ <, charge/discharge transformation device active power of output, energy storage Equipment provides the deficit power needed for load to load discharge, i.e. energy storage device;Work as Po< P1max+P2max+…+PnmaxWhen, uoIncrease Greatly, 90 ° of θ >, the negative active power of charge/discharge transformation device output, loads and is exported to energy storage device feedback energy, i.e. multiple input source Dump power charge to energy storage device, loaded when θ=180 ° maximum to the energy of energy storage device feedback.Therefore, the energy Management and controlling tactics can be according to PoWith P1max+P2max+…+PnmaxRelative size control in real time single-stage isolated Bidirectional charging-discharging become The power flow size and Orientation of parallel operation, realizes smooth and seamless switching of the system under three kinds of different powering modes.

Claims (3)

  1. A kind of 1. non-isolated inverter of external Parallel Time-sharing selecting switch voltage-type single-stage multi input, it is characterised in that:It is this inverse It is to be filtered multiple input filters and a shared output altogether by a multiple input single output high-frequency inverter circuit to become device Wave circuit connection is formed, each input terminal of multiple input single output high-frequency inverter circuit and the output terminal one of each input filter One corresponds to connection, and the output terminal of multiple input single output high-frequency inverter circuit and the input terminal of the output filter circuit are connected; The multiple input single output high-frequency inverter circuit 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, and equivalent to one bidirectional power flow list is defeated at any time Enter single output high-frequency inverter circuit;The external multi-channel parallel timesharing selection four-quadrant power switch circuit per all the way only by One four-quadrant power switch forms and each road output terminal connects together;The output filter circuit is by output inductor Form, or sequentially cascaded and formed by output inductor, output filter capacitor, or by output inductor, output filter capacitor, Output inductor sequentially cascades composition.
  2. 2. the non-isolated inverter of external Parallel Time-sharing selecting switch voltage-type single-stage multi input according to claim 1, its It is characterized in that:The circuit topology of the non-isolated inverter of the external Parallel Time-sharing selecting switch voltage-type single-stage multi input is half-bridge Formula, full bridge circuit.
  3. 3. the non-isolated inverter of external Parallel Time-sharing selecting switch voltage-type single-stage multi input according to claim 1, its It is characterized in that:The output terminal of the non-isolated inverter of the external Parallel Time-sharing selecting switch voltage-type single-stage multi input 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 discharge and recharge switches.
CN201810019769.6A 2018-01-09 2018-01-09 The non-isolated inverter of external Parallel Time-sharing selecting switch voltage-type single-stage multi input Withdrawn CN108023495A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110995035A (en) * 2019-12-25 2020-04-10 中国科学院电工研究所 High-frequency inversion or rectification topology based on non-isolated inversion module and switching method

Citations (5)

* Cited by examiner, † Cited by third party
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
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
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
US20140301124A1 (en) * 2013-04-03 2014-10-09 Ablerex Electronics Co., Ltd. Cascade Bridge-type DC-AC Power Conversion Method and Converter Device Thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
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
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
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
US20140301124A1 (en) * 2013-04-03 2014-10-09 Ablerex Electronics Co., Ltd. Cascade Bridge-type DC-AC Power Conversion Method and Converter Device Thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110995035A (en) * 2019-12-25 2020-04-10 中国科学院电工研究所 High-frequency inversion or rectification topology based on non-isolated inversion module and switching method
CN110995035B (en) * 2019-12-25 2021-10-15 中国科学院电工研究所 High-frequency inversion or rectification topology based on non-isolated inversion module and switching method

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Application publication date: 20180511