CN205017203U - Be total to direct current source invertion power supply system and power supply system - Google Patents
Be total to direct current source invertion power supply system and power supply system Download PDFInfo
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- CN205017203U CN205017203U CN201520719262.3U CN201520719262U CN205017203U CN 205017203 U CN205017203 U CN 205017203U CN 201520719262 U CN201520719262 U CN 201520719262U CN 205017203 U CN205017203 U CN 205017203U
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- inductance
- inverter system
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- filter
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- 229910000859 α-Fe Inorganic materials 0.000 claims description 8
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
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- 229910052751 metal Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
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Abstract
The utility model discloses a be total to direct current source invertion power supply system and power supply system. Wherein, direct current source invertion power supply system includes altogether: be connected and two mutual parallelly connected at least invertion power supply systems with the dc bus, and two at least common mode inductance, wherein, every in the invertion power supply system series connection at least one common mode inductance. The utility model provides a connect the technical problem that the system output current who causes at a DC power supply contains a large amount of higher harmonic because a plurality of invertion power supply systems are common.
Description
Technical field
The utility model relates to field of power, in particular to one DC source inverter system and electric power system altogether.
Background technology
The structure of existing altogether DC source inverter system as shown in Figure 1, multiple inverter system (as the inverter system 1 in Fig. 1, inverter system 2 ..., inverter system N) be connected on common DC bus as load supplying.
But, when multiple inverter system is connected in a DC power supply jointly, and output is not when having an isolating transformer, conducted interference in electromagnetic interference will cause circulating current between parellel inversion power system except fundamental current, a large amount of higher harmonic current is also had to occur, as shown in Figure 2, i
1and i
2for in two inverter system parallel power supply system, the electric current that two inverter systems export respectively, V
0for load side voltage, comprise a large amount of high order harmonic components in electric current as seen from Figure 2.This can cause common DC source inverter system to calculate problem that is short or overload useful life.
For above-mentioned problem, at present effective solution is not yet proposed.
Utility model content
The utility model embodiment provides a kind of DC source inverter system and electric power system altogether, at least to solve because multiple inverter system is connected to the technical problem that system output current that a DC power supply causes comprises a large amount of high order harmonic component jointly.
According to an aspect of the utility model embodiment, provide a kind of DC source inverter system altogether, comprising: be connected with DC bus and parallel with one another at least two inverter systems; And at least two common mode inductances, wherein, each described inverter system is connected in series at least one described common mode inductance.
Further, described at least two common mode inductances all have FERRITE CORE and/or nanocrystal magnetic core.
Further, one end of each described common mode inductance all connects with the output of corresponding described inverter system, and the other end of each described common mode inductance is all connected with the ac bus of described DC source inverter system altogether.
Further, described system also comprises the load be connected on described ac bus.
Further, described inverter system comprises: inversion power electronic equipment, and wherein, the input of described inversion power electronic equipment is connected with the ac bus of described DC source inverter system altogether; Controller, is connected with described inversion power electronic equipment, opens for controlling described inversion power electronic equipment breaker in middle element and turns off; Filter, wherein, the input of described filter is connected with the output of described inversion power electronic equipment, and the output of described filter is connected with described common mode inductance.
Further, described filter is the filter be made up of an inductance, or described filter is the secondary filter be made up of an inductance and an electric capacity, or described filter is No. three filters be made up of two inductance and an electric capacity.
Further, when described filter is described No. three filters, the second inductance in the first inductance in described two inductance and described two inductance is connected in series, one end of described electric capacity is connected between described first inductance and described second inductance, described electric capacity and described first inductance parallel with one another, described electric capacity and described second inductance parallel with one another.
Further, described inversion power electronic equipment is single-phase or the inversion power electronic equipment of three-phase.
Further, DC source inverter system, also comprises: DC power supply, is connected with described DC bus altogether, for providing electric energy for described DC source inverter system altogether.
According to the another aspect of the utility model embodiment, additionally provide a kind of electric power system, comprising: the common DC source inverter system with above-mentioned arbitrary characteristics.
In the utility model embodiment, adopt DC source inverter system altogether to comprise and be connected and parallel with one another at least two inverter systems with DC bus, and at least two common mode inductances, wherein, each described inverter system is connected in series the mode of at least one described common mode inductance, by being connected in series at least one described common mode inductance on each described inverter system, reach the object suppressing the high order harmonic component be parallel in the inverter system output current of same DC power supply, thus achieve the technique effect increasing DC source inverter system fail safe altogether, and then solve because multiple inverter system is connected to the technical problem that system output current that a DC power supply causes comprises a large amount of high order harmonic component jointly.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, and form a application's part, schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation of a kind of DC source inverter system altogether according to prior art;
Fig. 2 is a kind of output current and the load side voltage waveform schematic diagram being total to DC source inverter system according to prior art;
Fig. 3 is the structural representation of a kind of optional DC source inverter system altogether according to the utility model embodiment;
Fig. 4 is the structural representation of a kind of optional inverter system according to the utility model embodiment;
Fig. 5 is the structural representation of a kind of optional filter according to the utility model embodiment;
Fig. 6 is the structural representation of a kind of optional secondary filter according to the utility model embodiment;
Fig. 7 is the structural representation of a kind of optional No. three filters according to the utility model embodiment;
Fig. 8 is a kind of output current and the load side voltage waveform schematic diagram being total to DC source inverter system according to the utility model embodiment;
Fig. 9 applies the output current after gentle current Control Algorithm and load side voltage waveform schematic diagram according to a kind of DC source inverter system altogether of the utility model embodiment.
Embodiment
The utility model scheme is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the embodiment of the utility model part, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all should belong to the scope of the utility model protection.
It should be noted that, term " first ", " second " etc. in specification of the present utility model and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged in the appropriate case, so as embodiment of the present utility model described herein can with except here diagram or describe those except order implement.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
According to the utility model embodiment, provide a kind of embodiment of DC source inverter system altogether.Fig. 3 is the structural representation of the common DC source inverter system according to the utility model embodiment, and as shown in Figure 3, DC source inverter system comprises following part altogether: be connected with DC bus and parallel with one another at least two inverter systems; And at least two common mode inductances 302, wherein, each inverter system is connected in series at least one common mode inductance 302.
As shown in Figure 3, in parallel multiple inverter system (inverter system 1, inverter system 2 on DC bus, inverter system N), each inverter system is all connected in series a common mode inductance 302, the utility model at the exit of inverter system access common mode inductance, there is the problem of a large amount of high order harmonic component in the output current solving existing altogether DC inverter system.Wherein, the material of iron core manufacturing common mode inductance can adopt ferrite or nanocrystal, and preferably, the high permeability of nanocrystal and the strong feature of thermal stability are more suitable for jumbo application.
The common DC source inverter system of the utility model embodiment, by being connected in series at least one common mode inductance on each inverter system, reach the object suppressing the high order harmonic component be parallel in the inverter system output current of same DC power supply, thus achieve the technique effect increasing altogether DC source inverter system fail safe, and then solve because multiple inverter system is connected to the technical problem that system output current that a DC power supply causes comprises a large amount of high order harmonic component jointly.
Alternatively, at least two common mode inductances all have FERRITE CORE and/or nanocrystal magnetic core.
Wherein, ferrite has ferromagnetic metal oxide in using, and generally can be divided into permanent-magnet ferrite, soft magnetic ferrite and gyromagnetic ferrite three kinds.With regard to electrical characteristics, ferritic resistivity is more much bigger than metal, alloy magnetic material, and also has higher dielectric property.Ferritic magnetic property has higher magnetic permeability when also showing high frequency.
Alternatively, still as shown in Figure 3, one end of each common mode inductance 302 all connects with the output of corresponding inverter system, and the ac bus of the other end of each common mode inductance 302 DC source inverter system all together connects.
Alternatively, still as shown in Figure 3, DC source inverter system also comprises the load 304 be connected on ac bus altogether.
Wherein, as shown in Figure 3, the electric energy that DC power supply 306 produces flows into each inverter system respectively through DC bus, is flowing into common mode inductance 302, then power for load 304 after ac bus via each common mode inductance 302 after inverter system.
Alternatively, as shown in Figure 4, inverter system comprises following part: inversion power electronic equipment 402, controller 404 and filter 406.
Inversion power electronic equipment 402, wherein, the ac bus of the input of inversion power electronic equipment 402 DC source inverter system together connects; Controller 404, is connected with inversion power electronic equipment 402, opens for controlling inversion power electronic equipment 402 breaker in middle element and turns off; Filter 406, wherein, the input of filter 406 is connected with the output of inversion power electronic equipment 402, and the output of filter 406 is connected with common mode inductance 302.
As shown in Figure 4, inverter system comprises inversion power electronic equipment 402, the controller 404 that control inversion power electronic equipment 402 breaker in middle element cut-offs and filter.Inversion power electronic equipment 402 can be single-phase also can be three-phase, inverter system is at new-energy grid-connecteds such as photovoltaics, extensive application in UPS (UninterruptiblePowerSystem/UninterruptiblePowerSupply, uninterrupted power supply) system.
Alternatively, as shown in Figure 5, filter is the filter be made up of an inductance 502.
Alternatively, as shown in Figure 6, filter is the secondary filter be made up of an inductance 602 and an electric capacity 604.
Alternatively, filter is No. three filters be made up of two inductance and an electric capacity.The i.e. filter filter that can be made up of inductance, the secondary filter be made up of inductance and electric capacity also can be No. three filters of two inductance single capacitor composition.
Alternatively, as shown in Figure 7, when filter is No. three filters, the first inductance 702 in two inductance and the second inductance 704 in two inductance are connected in series, one end of electric capacity 706 is connected between the first inductance 702 and the second inductance 704, electric capacity 706 and the first inductance 702 parallel with one another, electric capacity 706 and the second inductance 704 parallel with one another.
Alternatively, inversion power electronic equipment is single-phase or the inversion power electronic equipment of three-phase.
Alternatively, still as shown in Figure 3, DC source inverter system also comprises DC power supply 306 altogether, is connected, for providing electric energy for common DC source inverter system with DC bus.
The utility model adopts common mode inductance to suppress the high order harmonic component be parallel in the inverter system output current of same DC power supply, and advantage is that volume is little, loss is low, anti-electromagnetic interference capability is strong.
Below, two inverter systems are comprised with common DC source inverter system, be connected to same DC power supply, it is example as the common mode inductance that core material is made that the output of each inverter system all connects one by nanocrystal, the electric current exported as shown in Figure 8, as seen from Figure 8, the electric current (i of two inverter system outputs
1and i
2) curve smoothing, V
0for load side voltage, it can thus be appreciated that the high order harmonic component produced in existing DC source inverter system altogether obtains effective suppression.
In the utility model, after the limitation of high harmonics achieving common DC source inverter system output current, balanced balanced current control algolithm can be introduced in the controller of each inverter system further.After introducing balanced balanced current control algolithm in the controller of each inverter system, as seen from Figure 9, inverter system can be made to export impartial electric current.
Additionally provide a kind of electric power system according to the utility model embodiment, comprise the common DC source inverter system with above-mentioned arbitrary characteristics.
In above-described embodiment of the present utility model, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.
In several embodiments that the application provides, should be understood that, disclosed technology contents, the mode by other realizes.Wherein, device embodiment described above is only schematic, the such as division of described unit, can be that a kind of logic function divides, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of unit or module or communication connection can be electrical or other form.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed on multiple unit.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the utility model can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.
If described integrated unit using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part that the technical solution of the utility model contributes to prior art in essence in other words or all or part of of this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprises all or part of step of some instructions in order to make a computer equipment (can be personal computer, server or the network equipment etc.) perform method described in each embodiment of the utility model.And aforesaid storage medium comprises: USB flash disk, read-only memory (ROM, Read-OnlyMemory), random access memory (RAM, RandomAccessMemory), portable hard drive, magnetic disc or CD etc. various can be program code stored medium.
The above is only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (10)
1. be total to a DC source inverter system, it is characterized in that, comprising:
Be connected with DC bus and parallel with one another at least two inverter systems; And
At least two common mode inductances, wherein, each described inverter system are connected in series at least one described common mode inductance.
2. system according to claim 1, is characterized in that, described at least two common mode inductances all have FERRITE CORE and/or nanocrystal magnetic core.
3. system according to claim 1, it is characterized in that, one end of each described common mode inductance all connects with the output of corresponding described inverter system, and the other end of each described common mode inductance is all connected with the ac bus of described DC source inverter system altogether.
4. system according to claim 3, is characterized in that, described system also comprises the load be connected on described ac bus.
5. system according to any one of claim 1 to 4, is characterized in that, described inverter system comprises:
Inversion power electronic equipment, wherein, the input of described inversion power electronic equipment is connected with the ac bus of described DC source inverter system altogether;
Controller, is connected with described inversion power electronic equipment, opens for controlling described inversion power electronic equipment breaker in middle element and turns off;
Filter, wherein, the input of described filter is connected with the output of described inversion power electronic equipment, and the output of described filter is connected with described common mode inductance.
6. system according to claim 5, it is characterized in that, described filter is the filter be made up of an inductance, or, described filter is the secondary filter be made up of an inductance and an electric capacity, or described filter is No. three filters be made up of two inductance and an electric capacity.
7. system according to claim 6, it is characterized in that, when described filter is described No. three filters, the second inductance in the first inductance in described two inductance and described two inductance is connected in series, one end of described electric capacity is connected between described first inductance and described second inductance, described electric capacity and described first inductance parallel with one another, described electric capacity and described second inductance parallel with one another.
8. system according to claim 5, is characterized in that, described inversion power electronic equipment is single-phase or the inversion power electronic equipment of three-phase.
9. system according to claim 1, is characterized in that, also comprises:
DC power supply, is connected with described DC bus, for providing electric energy for described DC source inverter system altogether.
10. an electric power system, comprises the common DC source inverter system in claim 1 to 9 described in any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520719262.3U CN205017203U (en) | 2015-09-16 | 2015-09-16 | Be total to direct current source invertion power supply system and power supply system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520719262.3U CN205017203U (en) | 2015-09-16 | 2015-09-16 | Be total to direct current source invertion power supply system and power supply system |
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| CN205017203U true CN205017203U (en) | 2016-02-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI729333B (en) * | 2018-12-13 | 2021-06-01 | 台達電子工業股份有限公司 | Power converter with common dc power source and power supply apparatus having the same |
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2015
- 2015-09-16 CN CN201520719262.3U patent/CN205017203U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI729333B (en) * | 2018-12-13 | 2021-06-01 | 台達電子工業股份有限公司 | Power converter with common dc power source and power supply apparatus having the same |
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