CN102130618A - Inverter system using independent energy-storing capacitor module - Google Patents
Inverter system using independent energy-storing capacitor module Download PDFInfo
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- CN102130618A CN102130618A CN2011100717186A CN201110071718A CN102130618A CN 102130618 A CN102130618 A CN 102130618A CN 2011100717186 A CN2011100717186 A CN 2011100717186A CN 201110071718 A CN201110071718 A CN 201110071718A CN 102130618 A CN102130618 A CN 102130618A
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- storage capacitor
- inverter
- capacitor module
- translation circuit
- power supply
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Abstract
The invention discloses an inverter system using an independent energy-storing capacitor module. The inverter system comprises a direct-current power supply, an inverter and a connector, wherein the direct-current power supply is connected with the inverter. The inverter system also comprises an energy-storing capacitor module, wherein the energy-storing capacitor module is independently connected with the inverter through the connector. The inverter system has the advantages of conveniently changing the energy-storing capacitor module and reducing the maintenance cost.
Description
Technical field
The present invention relates to the inverter field, particularly a kind of inverter system that uses independent storage capacitor module.
Background technology
Inverter refers to direct current is transformed into the electrical energy transformer of alternating current.Inverter commonly used comprises two kinds: a kind ofly using in uninterrupted power supply, when electric network power-fail the direct current in the battery is converted to can be for the inverter of the alternating current of load use; Another kind is in the new energy resources system direct currents that natural energy produced such as wind energy, solar energy to be converted to the inverter that can use the alternating current that maybe can be incorporated into the power networks for load.Common inverter is divided into single-phase inverter and three-phase inverter again according to number of phases difference.The present invention mainly is the design at single-phase inverter.
A time variation that characteristics are its power outputs of single-phase inverter.At output power factor is 1 o'clock (voltage and current same-phase), if output voltage is: Vo (t)=Vpk sin (ω t), output current is Io (t)=Ipk sin (ω t), then power output is P (t)=Po (1-cos (2 ω t)), ω is the frequency of its output AC voltage, and Po is an average output power.Generally all be fit to be operated in permanent power mode for the DC power supply of inverter power supply, especially in new energy resources system.With the solar energy system is example, and the solar energy tabula rasa is under the irradiation of sunlight, and its photodiode produces direct voltage, and the size of this direct voltage is decided by the power of sunlight.Under the sunlight of determining, be substantially invariable amount from the obtainable maximum power of solar energy tabula rasa.Therefore, single-phase inverter just must be accepted to be bordering on constant input power, and above-mentioned periodically variable power output is provided, and so just requires its storage that must possess an energy and discharges link.
As shown in Figure 1, first kind of single-phase inverter inside has the Two Stages circuit.First order translation circuit (DC-DC) is the less direct voltage of AC (interchange) component of the more stable suitable second level translation circuit inversion of the bigger DC of excursion (direct current) power source change one-tenth, and it is more taller that generally this voltage source is answered the peak value of specific output alternating voltage.Second level translation circuit (DC-AC) realizes DC converting is become the function of interchange.Usually the SPWM (Sine Wave Pulse Width Modulation) by DSP (Digital Signal Processing, digital signal processor) control realizes.In this mechanism, storage capacitor C is generally high-voltage energy storage between two-stage.Voltage on the storage capacitor C can have variation to a certain degree.
As shown in Figure 2, second kind of single-phase inverter inside also has the Two Stages circuit.The output voltage of first order translation circuit (DC-DC) is the waveform of sinusoidal full-wave rectification.Second level translation circuit (DC-AC) is reduced to sinusoidal voltage to this waveform with the low frequency switch.In this structure, the unique position of storage capacitor C is to be placed on input.Consider the characteristic of solar energy tabula rasa class power supply, under the condition of work of determining, its change in voltage scope should be controlled at smaller scope, and therefore the stored energy capacitance that requires is bigger.The advantage of this mechanism is simple, and cost is low, the efficient height.Mostly small-power single-phase inverter in the market is to adopt this class formation.
In these two kinds of structures, the structure among Fig. 2 especially, because of stored energy capacitance requires greatly, cost can not be too high, and storage capacitor generally can only be selected electrochemical capacitor for use.Yet the life-span of electrochemical capacitor is lower, becomes the obstacle that influence improves system reliability.In the design in the past, electrochemical capacitor all is that other device with inverter is placed on the same circuit board, belong to same module, the life-span of whole like this inverter has just been determined by electrochemical capacitor on sizable degree, if storage capacitor damages, so whole inverter will be changed again.
Summary of the invention
Technical problem to be solved by this invention provides a kind of inverter system that uses independent storage capacitor module, and its side makes and changes storage capacitor and reduce maintenance cost.
For solveing the technical problem, the invention provides a kind of inverter system that uses independent storage capacitor module, this inverter system comprises DC power supply, inverter, connector, DC power supply is connected with inverter, it is characterized in that, this inverter system also comprises the storage capacitor module, and the storage capacitor module is connected with inverter independently by connector.
Preferably, described inverter comprises first order translation circuit and second level translation circuit, DC power supply, first order translation circuit and second level translation circuit are linked in sequence, and the storage capacitor module is connected between the input of the output of first order translation circuit and second level translation circuit.
Preferably, described inverter comprises first order translation circuit and second level translation circuit, DC power supply, first order translation circuit and second level translation circuit are linked in sequence, and the storage capacitor module is connected between the input and DC power supply of first order translation circuit by connector.
Preferably, the quantity of described storage capacitor module is at least two, adopts series system or parallel way to connect between the storage capacitor module.
Preferably, described inverter comprises the single-stage translation circuit, and the storage capacitor module is connected with the single-stage translation circuit by connector.
Preferably, described inverter comprises the single-stage translation circuit, and the storage capacitor module is connected between the input and DC power supply of single-stage translation circuit by connector.
Positive progressive effect of the present invention is:
One, the present invention is placed on storage capacitor and forms the storage capacitor module in the standalone module, with its mode that links to each other with inverter, makes replacing storage capacitor module very easy by connector.The price of storage capacitor module is the sub-fraction of whole inverter, greatly reduces the maintenance cost of system.
Two, the number of storage capacitor is also influential to systematic function and reliability, uses independently the storage capacitor module just to provide according to its budget with to the requirement of performance and reliability as the client and selects the quality of electric capacity and the chance of capacity.
Three, the way of independent storage capacitor module also makes Redundancy Design become possibility, and a plurality of storage capacitor modules can in parallel or series connection use.Each storage capacitor module adds protection mechanism, such as fuse.When destructive the damage appearred in the storage capacitor module, fuse can cut off itself and being connected of inverter, and does not have the storage capacitor module of fault to work on.
Four, because the space that storage capacitor accounts for is quite big, after being placed on storage capacitor on the standalone module, the volume of inverter greatly descends, to electric, heat radiation and the mechanism design of optimizing inverter, reduce cost tangible help is all arranged, also making simultaneously whole inversion system can be exactly inverter design a good example in the frame of solar energy tabula rasa than the shape that is easier to be designed to be fit to the total system expectation.
Description of drawings
Fig. 1 is the structural representation of existing first kind of single-phase inverter.
Fig. 2 is the structural representation of existing second kind of single-phase inverter.
Fig. 3 is the structural representation of first embodiment of the invention.
Fig. 4 is the structural representation of second embodiment of the invention.
Fig. 5 is the structural representation of third embodiment of the invention.
Fig. 6 is the structural representation of fourth embodiment of the invention.
Fig. 7 is the structural representation of fifth embodiment of the invention.
Fig. 8 is the structural representation of sixth embodiment of the invention.
Embodiment
Lift a preferred embodiment below, and come the clearer the present invention that intactly illustrates in conjunction with the accompanying drawings.
The present invention uses the inverter system of independent storage capacitor module to comprise DC power supply, inverter, connector, storage capacitor module, and DC power supply is connected with inverter, and the storage capacitor module is connected with inverter independently by connector.
As shown in Figure 3, the present invention uses the inverter system (first embodiment) of independent storage capacitor module to comprise DC power supply 1, inverter 2, connector 3, storage capacitor module 4, inverter 2 can be elements such as plug, inverter 2 comprises first order translation circuit (DC-DC) 21 and second level translation circuit (DC-AC) 22, DC power supply 1, first order translation circuit 21 and second level translation circuit 22 are linked in sequence, storage capacitor module 4 can be connected and separate with inverter 2 easily by connector 3, and storage capacitor module 4 is connected between the input of the output of first order translation circuit 21 and second level translation circuit 22, and special use two ports of storage capacitor module and the non-input and output of inverter are connected in parallel.Storage capacitor module 4 is put into original built-in storage capacitor on the independent module, it promptly is exactly the module that includes storage capacitor, by connector the storage capacitor module is linked to each other with inverter, make replacing storage capacitor module very easy, the price of storage capacitor module is the sub-fraction of whole inverter, greatly reduces the maintenance cost of system.In addition, the number of storage capacitor is also influential to systematic function and reliability, uses independently the storage capacitor module just to provide according to its budget with to the requirement of performance and reliability as the client and selects the quality of electric capacity and the chance of capacity.
As shown in Figure 4, the present invention uses the inverter system (second embodiment) of independent storage capacitor module basic identical with first embodiment of Fig. 3, and its difference is: storage capacitor module 4 is connected between the input and DC power supply 1 of first order translation circuit 21 by connector 3.
As shown in Figure 5, the present invention uses the inverter system (the 3rd embodiment) of independent storage capacitor module basic identical with second embodiment of Fig. 4, its difference is: inverter 2 comprises single-stage translation circuit 24, single-stage translation circuit 24 is finished the inversion conversion from the input direct current to output AC, and storage capacitor module 4 is connected between the input and DC power supply 1 of single-stage translation circuit 24 by connector 3.
As shown in Figure 6, the present invention uses the inverter system (the 4th embodiment) of independent storage capacitor module basic identical with the 3rd embodiment of Fig. 5, and its difference is: storage capacitor module 4 is connected with single-stage translation circuit 24 by connector 3.
As shown in Figure 7, the present invention uses the inverter system (the 5th embodiment) of independent storage capacitor module basic identical with first embodiment of Fig. 3, its difference is: the quantity of storage capacitor module 4 is two or more, and two storage capacitor modules 4 connect by connector 3.A plurality of storage capacitor modules can increase stored energy capacitance.Can adopt series system or parallel way to connect between a plurality of storage capacitor modules.The storage capacitor module is furnished with overcurrent and/or overvoltage protection mechanism, and such as fuse, when destructive the damage appearred in electric capacity, fuse can cut off itself and being connected of inverter, and does not have the storage capacitor module of fault to work on.
As shown in Figure 8, the present invention uses the inverter system (the 6th embodiment) of independent storage capacitor module basic identical with second embodiment of Fig. 4, its difference is: the quantity of storage capacitor module 4 is two, and two storage capacitor modules 4 interconnect by connector 3.
In sum, because the space that storage capacitor accounts for is quite big, after being placed on storage capacitor on the standalone module, the volume of inverter greatly descends, to electric, heat radiation and the mechanism design of optimizing inverter, reducing cost all has tangible help, and also making whole inversion system simultaneously can be exactly inverter design a good example in the frame of solar energy tabula rasa than the shape that is easier to be designed to be fit to the total system expectation.
Though more than described the specific embodiment of the present invention, it will be understood by those of skill in the art that these only illustrate, under the prerequisite that does not deviate from principle of the present invention and essence, can make numerous variations or modification to these execution modes.Therefore, protection scope of the present invention is limited by appended claims.
Claims (6)
1. inverter system that uses independent storage capacitor module, this inverter system comprises DC power supply, inverter, connector, DC power supply is connected with inverter, it is characterized in that, this inverter system also comprises the storage capacitor module, and the storage capacitor module is connected with inverter independently by connector.
2. the inverter system of the independent storage capacitor module of use as claimed in claim 1, it is characterized in that, described inverter comprises first order translation circuit and second level translation circuit, DC power supply, first order translation circuit and second level translation circuit are linked in sequence, and the storage capacitor module is connected between the input of the output of first order translation circuit and second level translation circuit.
3. the inverter system of the independent storage capacitor module of use as claimed in claim 1, it is characterized in that, described inverter comprises first order translation circuit and second level translation circuit, DC power supply, first order translation circuit and second level translation circuit are linked in sequence, and the storage capacitor module is connected between the input and DC power supply of first order translation circuit by connector.
4. as the inverter system of claim 2 or the independent storage capacitor module of 3 described uses, it is characterized in that the quantity of described storage capacitor module is at least two, adopt series system or parallel way to connect between the storage capacitor module.
5. the inverter system of the independent storage capacitor module of use as claimed in claim 1 is characterized in that described inverter comprises the single-stage translation circuit, and the storage capacitor module is connected with the single-stage translation circuit by connector.
6. the inverter system of the independent storage capacitor module of use as claimed in claim 1 is characterized in that described inverter comprises the single-stage translation circuit, and the storage capacitor module is connected between the input and DC power supply of single-stage translation circuit by connector.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100717186A CN102130618A (en) | 2011-03-24 | 2011-03-24 | Inverter system using independent energy-storing capacitor module |
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| CN2011100717186A CN102130618A (en) | 2011-03-24 | 2011-03-24 | Inverter system using independent energy-storing capacitor module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103916035A (en) * | 2014-04-21 | 2014-07-09 | 盐城工学院 | Single-stage inverter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001314089A (en) * | 2000-04-27 | 2001-11-09 | Matsushita Electric Ind Co Ltd | Inverter control circuit |
| CN101277029A (en) * | 2007-03-27 | 2008-10-01 | 宝山钢铁股份有限公司 | Method for maintaining operation of coal supply machine frequency transformer when switching instantly electric power of |
| CN101710716A (en) * | 2009-11-13 | 2010-05-19 | 南京航空航天大学 | Grid-connected inverter capable of reducing electrolytic capacitance |
| CN202004677U (en) * | 2011-03-24 | 2011-10-05 | 江苏兆能电子有限公司 | Inverter system using independent energy storage capacitor module |
-
2011
- 2011-03-24 CN CN2011100717186A patent/CN102130618A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001314089A (en) * | 2000-04-27 | 2001-11-09 | Matsushita Electric Ind Co Ltd | Inverter control circuit |
| CN101277029A (en) * | 2007-03-27 | 2008-10-01 | 宝山钢铁股份有限公司 | Method for maintaining operation of coal supply machine frequency transformer when switching instantly electric power of |
| CN101710716A (en) * | 2009-11-13 | 2010-05-19 | 南京航空航天大学 | Grid-connected inverter capable of reducing electrolytic capacitance |
| CN202004677U (en) * | 2011-03-24 | 2011-10-05 | 江苏兆能电子有限公司 | Inverter system using independent energy storage capacitor module |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103916035A (en) * | 2014-04-21 | 2014-07-09 | 盐城工学院 | Single-stage inverter |
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Application publication date: 20110720 |