CN203839969U - Inverter with integrated short-time energy accumulator - Google Patents
Inverter with integrated short-time energy accumulator Download PDFInfo
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- CN203839969U CN203839969U CN201420200365.4U CN201420200365U CN203839969U CN 203839969 U CN203839969 U CN 203839969U CN 201420200365 U CN201420200365 U CN 201420200365U CN 203839969 U CN203839969 U CN 203839969U
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- 239000003990 capacitor Substances 0.000 claims abstract description 46
- 238000013016 damping Methods 0.000 claims description 16
- 230000007423 decrease Effects 0.000 claims description 3
- 230000006978 adaptation Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/10—The dispersed energy generation being of fossil origin, e.g. diesel generators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
- H02J2300/26—The renewable source being solar energy of photovoltaic origin involving maximum power point tracking control for photovoltaic sources
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/10—The network having a local or delimited stationary reach
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Inverter Devices (AREA)
Abstract
Provided is an inverter with an integrated short-time energy accumulator. The inverter comprises a direct current voltage intermediate loop (8) at an input side, an input port (2) used for connecting an external direct current power supply (4) to the direct current voltage intermediate loop (8), an energy accumulator (10) capable of being connected to the direct current voltage intermediate loop (8) without a converter, an output port (5) used for connecting the inverter (1) to an external alternating current grid (7), and a charging circuit (11) used for charging up the energy accumulator (10) by an alternating current voltage applied to the output port (5). In the inverter, the energy accumulator (10) is a capacitor type energy accumulator (10), the charging circuit (11) enables the capacitor type energy accumulator (10) to be charged to a voltage (UC1), and the voltage is higher than the peak voltage of the alternating current voltage applied to the output port (5) by at least 20%.
Description
Technical field
The utility model relates to a kind of inverter with integrated accumulator, and described accumulator has the feature as described in the preamble of independent claims 1.
Background technology
Described inverter especially relates to a kind of photovoltaic DC-to-AC converter, that is to say a kind of inverter, electric energy can utilize described inverter and by DC power supply feed-in one AC network with photovoltaic generator form, and described inverter and this purposes for example have one adaptedly for following the tracks of or for following the trail of the device of MPP (Maximum Power Point=maximum power working point) of this photovoltaic generator.
In addition, described inverter is especially arranged for electric energy feed-in one island-grid, one is subject in the AC network of gauge, and in this island-grid, the overwhelming majority as far as possible of powering is to be born by described inverter, so that especially by the renewable energy resources.Being connected to not only has a various load on this island-grid conventionally, and also have other AC power, especially with the AC power of diesel engine generator form, described other AC power is born Power supply, if sufficiently feed-in electric energy is in this island-grid by described inverter, example is as in the night or in the time of the cloudy day.
For can be as far as possible largely by from the renewable energy resources and utilize the electric energy of one or more inverter institute feed-in to cover the energy requirement in an island-grid, so, in the time not needing electric energy from diesel engine generator is current, cut off the described Diesel engine that is connected described island-grid with inverter parallel ground.If but due to the power decline of the renewable energy resources by inverter feed-in or due to the additional load in this island-grid, energy requirement exceedes the energy supply in this island-grid, so, determining the energy requirement that is not satisfied until met being just proved to be during this period of time as easily going wrong between this power requirement by the diesel engine generator restarting and again access described island-grid.In order to stop described island-grid collapse, within this time period, just temporarily provide electric energy required in this island-grid by another power supply.
Be known that: a battery is connected on an island-grid by two-way battery inverter, so that the fluctuation of the electric power supply in this island-grid of balance.That is to say, if exist the electric energy power supply in described island-grid superfluous, described battery is just saved electric energy; And the electric energy that described battery saved before this by feedback compensates the electric energy electricity shortage in described island-grid.But this battery size setting relative to the earth with battery inverter, to can compensate the interior electrical power lacking of island-grid in these cases.Correspondingly, the cost of this battery with battery inverter is also quite high.
Also be known that: battery is connected in the direct voltage intermediate loop of input side of described inverter, electric energy mainly utilizes described direct voltage intermediate loop to be fed into described island-grid from the renewable energy resources.Described battery carries out for voltage adaptation and for the DC/DC transducer of determining power flow direction by one to the connection in described direct voltage intermediate loop.If electric energy supply collapse or an additional load from the renewable energy resources access described island-grid, this DC/DC transducer just must be delivered to the whole power of described battery in described direct voltage intermediate loop.Therefore, enough size settings and correspondingly with high costs greatly of described DC/DC transducer.
Known by DE 10 2,001 019 267 B4, by a battery directly the input side of the described inverter of access direct voltage intermediate loop and use a voltage regulating device of described inverter, for the control of power flow direction.That is to say, if need to be from the electric energy of described battery, the MPP that just stops described inverter follows the trail of, and the intermediate circuit voltage that makes the direct voltage intermediate loop of described input side is set like this and is coordinated mutually with the output voltage of described battery, makes to flow into described direct voltage intermediate loop from the electric energy of described battery.In the time that enough electric energy is provided again by the photovoltaic generator that is used as main DC power supply here, the charging again of described battery also can be controlled by setting intermediate circuit voltage.For example, in the time that no longer can provide photovoltaic generator night, for the assist type charging of battery, a charging circuit being connected with the ac voltage output of inverter is set.In order to meet the high power requirements of short time in island-grid, by the battery of the known inverter of DE 10 2,010 019 267 B4 must be very large size set and correspondingly with high costs, this be because the interior resistance of described battery must be relatively little (therefore, described battery must have the battery unit of many parallel connections), therefore in the time taking out large power, the clamp voltage (Klemmspannung) of this battery just can not arrive too suddenly (einbricht).Described battery also can not be designed with corresponding voltage storage level and larger interior resistance, so because cell voltage is excessive in normal meeting in service, this cell voltage must balance each other with the voltage of photovoltaic generator.
Known so-called super capacitor, the i.e. capacitor of large electric capacity for large electrical power is provided at short notice.The electric capacity of these capacitors is the pseudocapacities based on double-deck principle and/or chemical property, and wherein, what double-deck principle had been guaranteed the electric energy stored in corresponding capacitor especially fast can mastery.Be stored in electric energy in capacitor can along with the voltage that this capacitor is charged to square and increase progressively.
Utility model content
Task of the present utility model is the inverter of the feature that a kind of preamble with independent claims 1 is provided, one accumulator is incorporated into wherein in mode effective and with low cost especially, wherein, described accumulator seldom uses, but should meet in short time very high power demand, as it for example can be after several seconds just be born by a diesel engine generator, this diesel engine generator as described in be connected on identical island-grid inverter.
This task of the present utility model solves by a kind of inverter of the feature with independent claims 1.The preferred implementation that dependent claims 2 to 9 defines according to inverter of the present utility model.
Have according to inverter of the present utility model: the direct voltage intermediate loop of an input side; One input port, for being connected to the DC power supply of an outside described direct voltage intermediate loop; One can without transducer access the accumulator of described direct voltage intermediate loop; One output port, for being connected to described inverter the AC network of one outside; One charging circuit, for being applied to alternating voltage on the described output port described accumulator that charges by one.Described accumulator is a condenser type accumulator, and described charging circuit makes described condenser type accumulator be charged to a voltage, and the peak pressure that is applied to the alternating voltage on described output port described in this voltage ratio exceeds at least 20% and preferably 40%.
Therefore, according in inverter of the present utility model, described accumulator is a condenser type accumulator, and described condenser type accumulator is charged to a higher voltage.The described peak pressure that is counted as standard of comparison at this that is applied to the alternating voltage on described output port also defines minimum intermediate circuit voltage, electric energy can be from this minimum intermediate circuit voltage, utilize described inverter, be fed in the AC network of described outside by the direct voltage intermediate loop of input side.Conventionally, described intermediate circuit voltage must at least roughly exceed the peak value (adjusting storage level) of alternating voltage, and therefore, electric current and then power can flow in the AC network of described outside without interruption.Therefore, if described condenser type accumulator is for example charged on the voltage of 1.4 times of alternating voltage peak pressure described in one and it provides electric energy for AC network described in feed-in by accessing described direct voltage intermediate loop, until described peak pressure is down in its electric discharge, so, it is by direct voltage intermediate loop described in the roughly half feed-in of its energy content that entirely square formula improves along with voltage.In a condenser type accumulator, in seconds just can realize described feed-in.In contrast, in chemical cell, cannot imagine the half that discharges at short notice the energy of being stored with which.
The charging circuit of the peak pressure that exceedes the alternating voltage on the output port that is applied to described inverter by far charging according to the condenser type accumulator of inverter of the present utility model can be implemented very simply.Described charging circuit can consist essentially of one and make to be applied to transformer and the rectifier for this High AC voltage that the alternating voltage on described output port boosts.The power of this charging circuit of flowing through needs not to be large, because conventionally there is the sufficient time to charge to described condenser type accumulator.
Although make to have obvious voltage difference between voltage that described condenser type accumulator is charged to and conventional intermediate circuit voltage at described charging circuit, but described accumulator without transducer, that is to say not voltage adaptation ground and the described direct voltage intermediate loop of rigid access at this point by DC/DC transducer according to the utility model.But can be meaningfully: gauge is at the balanced balanced current of this access situation current downflow.For this object, can between described direct voltage intermediate loop and described accumulator, be connected a damping current limiter and/or a damping resistance.Box lunch one such damping current limiter and/or such damping resistance with one when described accumulator being accessed to the switch of described direct voltage intermediate loop and connects, what it related to is passive (passive) damping element and they also do not form transducer together with described switch, because this switch is not timed (getaktet).Additionally, first described accumulator can access described direct voltage intermediate loop by a pre-charge resistance.Described direct voltage intermediate loop can be also precharged by multiple pre-charge resistances with different resistance values step by step by described accumulator, until the voltage on condenser type accumulator and intermediate circuit voltage mutual balance fully.Next, described condenser type accumulator can directly or via a damping element be connected in described direct voltage intermediate loop.But in the middle of under any circumstance not having, connect any transducer for voltage adaptation.
Described condenser type accumulator especially relates to so a kind of accumulator, and it is made up of super capacitor, to extra high electric capacity is provided and then extra high accumulation of energy ability is provided.Super capacitor can especially relate to again the double layer capacitor that mainly carries out accumulation of energy based on double layer capacity.
Between according to the described direct voltage intermediate loop of inverter of the present utility model and described input port, a decoupling diode can be set, described decoupling diode prevents that electric energy is by by described condenser type accumulator and the direct voltage intermediate loop of boost charge flows in a DC power supply being connected on described input port.If described DC power supply is a photovoltaic generator, one such decoupling diode is normally nonessential, even if because the energy flow from direct voltage intermediate loop to described photovoltaic generator requires to exceed the higher floating voltage (Leerlaufspannung) in cloudy situation of described photovoltaic generator.But, if also example is used described condenser type accumulator as in the night, a decoupling diode is also set at photovoltaic generator as DC power supply in the situation that.
In the time using according to inverter of the present utility model, measurement is applied to the mains frequency of the alternating voltage on described output port.Measured mains frequency and voltage can illustrate one and be subject to the AC network of gauge, for example power-balance in an island-grid.Because have fewer generator and electrical appliance in an island-grid, the power generation of described generator and electrical appliance and consume can be on time average balance, so the access of large load and remove multiple generators and can exert an influence strongerly.As a result, mains frequency reduces along with the minimizing of electric power supply in island-grid.Therefore, the mains frequency dropping to below boundary value given in advance means, has very few electric energy in this island-grid, thereby makes an additional AC power to be connected on this island-grid.If this additional AC power is a diesel engine generator, it needs certain startup stage so, thereby makes until electric energy should be by means of being spent according to the condenser type accumulator of inverter of the present utility model by the interlude in island-grid described in described additional AC power feed-in.Therefore, when mains frequency is during lower than boundary value given in advance, so described accumulator is access in described direct voltage intermediate loop.Be alternatively to mains frequency itself, also can evaluate mains frequency with regard to described by the temporal change with regard to the power-balance in the AC network of gauge.First this access can pass through a pre-charge resistance, and then undertaken by a damping current limiter and/or a damping resistance, the resistance value of described damping resistance is up to the half of the resistance value of described pre-charge resistance, conventionally the highest 1/5th or 1/10th and can be also less.
When mains frequency is during lower than described boundary value given in advance, access at least one diesel engine generator can in parallel described island-grid, described diesel engine generator is in several seconds, conventionally roughly provide lacked electric energy after 10 to 20 seconds.Spend the time period in described several seconds by described condenser type accumulator.
If described accumulator is access in described direct voltage intermediate loop, the possible MPP that is connected to DC power supply, especially photovoltaic generator on described input port follows the trail of and utilizes aptly the therefore connected output current adjusting device of described inverter to be terminated.The substitute is, described inverter moves in this wise, makes enough large output currents that flows, so that support mains frequency.In the case of such output voltage regulator of described inverter, the electric current of the direct voltage intermediate loop of flowing through is set according to the energy requirement in island-grid.
If described accumulator is access in described direct voltage intermediate loop, so, described charging circuit can be deactivated, to do not guide electric energy in loop.But in the situation that described charging circuit power is very little, also can abandon adopting this measure.
If described accumulator discharges on the described peak pressure of the alternating voltage being applied on described output port, that is to say, described accumulator no longer can be by direct voltage intermediate loop described in the electric energy feed-in in island-grid described in described inverter feed-in, and so described accumulator separates with described direct voltage intermediate loop aptly.After it charges again, described accumulator just can be used aptly.
Favourable improvement project of the present utility model is by drawing in claims, specification and accompanying drawing.The advantage of mentioning in specification of described these features and multiple Feature Combinations is only exemplary and alternatively or generation effect cumulatively, and needn't be forcibly by obtaining these advantages according to execution mode of the present utility model.In the case of the theme of appended claim does not change therefrom, for the disclosure aspect of original application documents and utility model, be suitable for following principle, that is: can, from accompanying drawing, especially from the positioned opposite illustrating of multiple members is connected with effect, draw further feature.Similarly, the different combinations of feature of execution mode of the utility model or the combination of the feature of different claims can depart from the selected adduction relationship of claim and obtain and inspire thus.This also relates to those in those features shown in single accompanying drawing or that mention in it is described.These features also can from the Feature Combination of different claims.The feature of enumerating in the claims can be cancelled for other execution mode of the present utility model equally.
Aspect its number, understanding like this feature of mentioning in claim and specification, that is: this number or compare the number that mentioned number is larger just in time, and do not need clearly to use adverbial word " at least ".Therefore, for example, ought mention an element, this will understand like this,, has just what a element, two elements or multiple element that is.These features can be supplemented or such those unique features by other features, form result separately by these features.
The Reference numeral comprising in claim is not the restriction of the scope of the theme protected by claim.These reference numerals list are only for making the more understandable object of claim.
Brief description of the drawings
Further set forth and illustrate the utility model by the embodiment shown in accompanying drawing below.
Fig. 1 shows the schematic diagram according to inverter of the present utility model, and a photovoltaic generator is transfused to side and is connected thereto and this inverter is connected in AC network by a transformer at outlet side.
Embodiment
The inverter 1 schematically showing in Fig. 1 has an input port 2, and at this, photovoltaic generator 3 is connected on this input port as DC power supply 4.Inverter 1 is connected in AC network 7 via selectable power grid transformer 6 with an output port 5.Can relate in the case an island-grid.Input port 2 is guided the direct voltage intermediate loop 8 of the input side of inverter 1 into, and described direct voltage intermediate loop is formed by an intermediate circuit capacitor C2.In fact this intermediate circuit capacitor C2 can be made up of multiple single capacitors that are connected in series and/or be connected in parallel.Described capacitor can especially comprise two capacitors that are connected in series, and wherein, the intermediate point of these capacitors can be connected with the star convergence point (N) of electrical network 7.The intermediate circuit voltage U reducing on described intermediate circuit capacitor C2
c2a DC/AC transducer 9 by inverter 1 is converted to output AC voltage, to electric energy is out fed in AC network 7 by network transformer 6 by direct voltage intermediate loop 8.If AC network 7 for example relates to an island-grid, so, when having a load to be access in this AC network 7 or working as the electric energy being provided by photovoltaic generator 3 for example because the cloud layer rising reduces, interior the provided electric energy of AC network 7 may lag behind demand rapidly.So, in order to meet energy requirement needs be to access additional AC power to AC network 7.But this access for example needs the time of several seconds in the situation that of diesel engine generator, until described additional AC power can meet the energy requirement in AC network 7 actually.In order to spend section during this period of time, that is to say, for extra electrical power is temporarily provided, inverter 1 has the condenser type accumulator 10 with double layer capacitor C1 form here.Described double layer capacitor C1 also can be made up of multiple single bilayered capacitors that are connected in parallel and/or be connected in series actually.Be provided with a charging circuit 11 in order to give double layer capacitor C1 charging, described charging circuit is expressed as the AC/DC transducer 12 of electrical isolation here.Basic Shangdi, described charging circuit 11 relates to one and makes to be applied to the transformer and that the alternating voltage on output port 5 boosts and be connected on this transformer rectifier below.Double layer capacitor C1 is charged to such voltage by described charging circuit 11, this voltage be applied to the alternating voltage on described output port 5 peak pressure at least 120%, preferably 140%.It also can be charged to double layer capacitor C1 1.6 times of so high voltages or voltage that also will be higher.Importantly, film capacitor C1 is charged to a voltage U more required than the minimum of direct voltage intermediate loop 8 by charging circuit 11
c2obviously higher voltage U
c1, to electric energy is out utilized described in 9 feed-ins of DC/AC transducer in AC network 7 by this direct voltage intermediate loop 8.At this, the power of the charging circuit 11 of flowing through can retain littlely, because conventionally have many time for the double layer capacitor C1 charging of battery in other words.
If the interior available electric energy of AC network 7 can not meet energy requirement, so, by mains frequency, be namely applied to the alternating voltage on output port 5 by outside decline can notice this point.If mains frequency is less than boundary value, so, inverter 1 just recognizes thus, and it must provide extra electric energy by its condenser type accumulator 10.For this reason, the MPP of photovoltaic generator 3 operation is interrupted and is adjusted in the voltage-regulation of DC/AC transducer 9.For condenser type accumulator 10 is discharged in described direct voltage intermediate loop 8, in the case of switch S 4 closures that for good and all by a safeties F4, a side of double layer capacitor C1 are connected with a side of intermediate circuit capacitor C2, first with a safeties F1, the opposite side of described double layer capacitor C1 is connected via a larger pre-charge resistance R1 by Closing Switch S1 with the opposite side of intermediate circuit capacitor C2.At this, larger pre-charge resistance R1 has stoped the very large current flowing between capacitor C1 and C2.In the time having carried out certain voltage adaptation, switch S 2 is closed, described the other end that this switch makes two capacitor C1 and C2 via one compared with little pre-charge resistance R2 and a safeties F2 and interconnect.If further continue the precharge of described intermediate circuit capacitor C2, with regard to Closing Switch S3, this switch makes described double layer capacitor C1 only also by a damping current limiter L1 and a damping resistance R3 and a safeties F3, accesses to described intermediate circuit capacitor C2 rigidly.Therefore, in gauge mobile electric current, electric energy is passed in direct voltage intermediate loop 8 by condenser type accumulator 10.Electric energy utilizes DC/AC transducer 9 to be fed in AC network 7 therefrom.At this, charging circuit 11 can be cut off.But in the case of the power of charging circuit 11 is only very little, this is not to force to need.In addition, switch S 1 and S2 can again be opened after Closing Switch S2 or S3.But this neither be important, because as long as switch S 3 is closed, just only there are little power the flow through switch S 1 and the S2 that are connected in series with pre-charge resistance R1 and R2.Decoupling diode D1 prevents: electrical power is flowed in the DC power supply 4 being connected on input port 2, if the voltage drop of this DC power supply is to intermediate circuit voltage U via direct voltage intermediate loop 8 by described condenser type accumulator C1
c2below.
Can extract electric energy by condenser type accumulator 10 always, until after Closing Switch S3 equal voltage U
c1and voltage U
c2drop to a minimum voltage, this minimum voltage must apply via direct voltage intermediate loop 8, to utilize DC/AC transducer 9 by electric energy feed-in AC network 7.As already implemented, this voltage is near the peak pressure that is applied to the alternating voltage on output port 5.Therefore, if double layer capacitor C1 is charged to one than the voltage U of this peak pressure high approximately 40%
c1on, so, stored the only about half of of whole electric energy can be fed in AC network 7 via inverter 1 in short-term in described double layer capacitor, until lower than for electric energy feed-in AC network 7, by the described minimum voltage of direct voltage intermediate loop 8.If this minimum voltage is 500 volts practically and has carried out double layer capacitor C1 until be charged on 800 volts, according to the quadratic relationship between electric energy and the described voltage stored the capacitor in the situation that, even just may roughly to use at short notice the energy in double layer capacitor C1 that is stored in more than 60%.Share of being provided at short notice by the energy of storing in chemical cell is just provided far away for this.
Switch S 1 to S3 is preferably implemented as mechanical switch, i.e. gate.But also semiconductor switch.From can remove network transformer 6, decoupling diode D1, safeties F1 to F4, switch S 1, S2 and S4, pre-charge resistance R1 and R2 and damping element R3 and L2 the circuit of the inverter 1 shown in Fig. 1, if admit of large electric current by remaining switch S 3 between double layer capacitor C1 and intermediate circuit capacitor C2 yet, do not exist energy to flow into the risk in the DC power supply 4 that input side connects by direct voltage intermediate loop 8 and between output port 5 and AC network 7, do not need the words of voltage adaptation.
Reference numerals list
1 inverter
2 input ports
3 photovoltaic generators
4 DC power supply
5 output ports
6 network transformers
7 AC network
8 direct voltage intermediate loops
9 DC/AC transducers
10 accumulators
11 charging circuits
12 AC/DC transducers
D1 decoupling diode
F1 safeties
F2 safeties
F3 safeties
F4 safeties
R1 pre-charge resistance
R2 pre-charge resistance
S1 switch
S2 switch
S3 switch
S4 switch
L1 damping current limiter
R3 damping resistance
C1 double layer capacitor
C2 intermediate circuit capacitor
U
c1voltage on C1
U
c2voltage on C2.
Claims (9)
1. inverter (1), it has:
The direct voltage intermediate loop (8) of-mono-input side;
-mono-input port (2), is connected to described direct voltage intermediate loop (8) for the DC power supply (4) that makes an outside;
-mono-can without transducer access the accumulator (10) of described direct voltage intermediate loop (8);
-mono-output port (5), for making described inverter (1) be connected to the AC network (7) of an outside; And
-mono-charging circuit (11), for being applied to alternating voltage on described output port (5) the described accumulator (10) that charges by one,
It is characterized in that,
-described accumulator (10) is a condenser type accumulator (10); And
-construct so described charging circuit (11), make described charging circuit that described condenser type accumulator (10) is charged to a voltage (U
c1), the peak pressure that is applied to the alternating voltage on described output port (5) described in this voltage ratio exceeds at least 20%.
2. inverter according to claim 1 (1), is characterized in that, described charging circuit (11) has described in making and is applied to the transformer that the alternating voltage on described output port (5) boosts.
3. inverter according to claim 1 and 2 (1), is characterized in that, constructs so described charging circuit (11), makes described charging circuit that described condenser type accumulator (10) is charged to a voltage (U
c1), the peak pressure that is applied to the alternating voltage on described output port (5) described in this voltage ratio exceeds at least 40%.
4. inverter according to claim 1 and 2 (1), it is characterized in that, described accumulator (10) can access described direct voltage intermediate loop (8) by a damping current limiter (L1) and/or a damping resistance (R3).
5. inverter according to claim 1 and 2 (1), is characterized in that, first described accumulator (10) can access described direct voltage intermediate loop (8) by a pre-charge resistance (R1, R2).
6. inverter according to claim 5 (1), it is characterized in that, described pre-charge resistance (R1, R2) can be set in different resistance values, so that described resistance value can decline by the progress of the precharge of described pre-charge resistance (R1, R2) along with described direct voltage intermediate loop (8).
7. inverter according to claim 1 and 2 (1), is characterized in that, described accumulator (10) has at least one super capacitor.
8. inverter according to claim 1 and 2 (1), is characterized in that, described accumulator (10) has at least one double layer capacitor (C1).
9. inverter according to claim 1 and 2 (1), is characterized in that, between described direct voltage intermediate loop (8) and described input port (2), is connected with at least one decoupling diode (D1).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102013101728 | 2013-02-21 | ||
| DE102013101728.2 | 2013-02-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203839969U true CN203839969U (en) | 2014-09-17 |
Family
ID=51264047
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420200365.4U Expired - Fee Related CN203839969U (en) | 2013-02-21 | 2014-02-20 | Inverter with integrated short-time energy accumulator |
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| Country | Link |
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| CN (1) | CN203839969U (en) |
| DE (1) | DE102014101610A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014217703A1 (en) * | 2014-09-04 | 2016-03-10 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | DEVICE FOR LOADING AN ENERGY STORAGE |
| EP3696928A1 (en) * | 2019-02-15 | 2020-08-19 | Siemens Aktiengesellschaft | Energy supply network |
| IT202200007097A1 (en) * | 2022-04-11 | 2023-10-11 | Imer Int S P A | Device that can be used for the input stage of electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010019267B4 (en) | 2010-05-04 | 2012-08-30 | Adensis Gmbh | Photovoltaic system with targeted mismatching to the MPP and associated operating method |
-
2014
- 2014-02-10 DE DE201410101610 patent/DE102014101610A1/en not_active Withdrawn
- 2014-02-20 CN CN201420200365.4U patent/CN203839969U/en not_active Expired - Fee Related
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|---|---|
| DE102014101610A1 (en) | 2014-08-21 |
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