CN203851018U - Inverter used for storing electric power in energy supply network, specially for photovoltaic system - Google Patents
Inverter used for storing electric power in energy supply network, specially for photovoltaic system Download PDFInfo
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- CN203851018U CN203851018U CN201420199383.5U CN201420199383U CN203851018U CN 203851018 U CN203851018 U CN 203851018U CN 201420199383 U CN201420199383 U CN 201420199383U CN 203851018 U CN203851018 U CN 203851018U
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- inverter
- intermediate circuit
- temperature
- energy supply
- supply network
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- 239000004065 semiconductor Substances 0.000 claims abstract description 27
- 239000003990 capacitor Substances 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims description 32
- 230000017525 heat dissipation Effects 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 238000009423 ventilation Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 9
- 230000007246 mechanism Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
-
- 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
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
-
- 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
-
- 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
Abstract
The utility model relates to an inverter (10), used for storing electric power in an energy supply network (7), specially for a photovoltaic system; the inverter comprises an intermediate circuit capacitor arrangement (12) and a plurality of semiconductor power switches controlled by a controller (14); the inverter (10) is provided with at least a temperature sensor (15) used for determining the temperature (T) of the intermediate circuit capacitor arrangement (12); the controller (14) is configured in the following condition: if the electric power is not stored in the energy supply network (7), the semiconductor power switches are controlled according to the temperature (T), so the dissipation heat of the inverter (10) can be used for pre-heating the intermediate circuit capacitor arrangement (12).
Description
The utility model relates to a kind of inverter, is particularly useful for photovoltaic system, is used for electrical power to be stored in an energy supply network, and this inverter has an intermediate circuit arrangement (Zwischenkreis-Kondensatoranordnung).
In photovoltaic system (being designated hereinafter simply as PV system), inverter is for the direct current being produced by photovoltaic generator (PV generator) is converted to alternating current, and this alternating current can single-phase ground or heterogeneous being stored in a disclosed or privately owned supply network.In the application's framework, PV generator is interpreted as the various arrangements of preferred a plurality of photovoltaic module (PV module) at this.
That this type of the inverter for PV system has in its direct-flow input circuit or a DC voltage intermediate circuit is a plurality of (buffering-) capacitor, although so that the current draw of having carried out chopping when converting alternating current to still by the direct voltage smoothing of being carried by PV generator and improve thus maximum extractible peak current pulse.The in the situation that of single-stage inverter, one of them inverter bridge directly loads with the voltage of PV generator, is connected this type of capacitor arrangement and PV parallel operation of generator.The in the situation that of multi-level inverter, this inverter bridge is connected to the upstream of a commutator transformer, and this commutator transformer is by PV boost in voltage or be depressured to a voltage levvl that is suitable for inverter bridge work.In this type of system, capacitor arrangement is arranged between commutator transformer (also referred to as DC (direct current)/DC transformer) and inverter bridge conventionally, and is also called for this reason intermediate circuit arrangement.In the application's framework, hereinafter, with this capacitor arrange location-independent, by arranging, have the circuit of this capacitor arrangement to be called intermediate circuit according to general terms synoptically.Accordingly, for the capacitor arrangement of voltage smoothing being called as to intermediate circuit arrangement when the discontinuous circuit extraction.
The capacitor that intermediate circuit arrangement generally comprises one or more parallel connections and/or is connected in series.In most cases use electrolytic condenser, these electrolytic condensers have very little volume and cheap price for its capacity.The shortcoming of electrolytic condenser is at low temperatures, especially, at the temperature lower than 0 degree Celsius, due to used electrolytical physical change, to demonstrate the significantly reduction (" freezing ") on its capacity.Especially in the open in the situation of system, the intermediate circuit arrangement of inverter is often exposed to this type of lower temperature.In storage work by day, convert the heating that hot dissipation power causes electrolytic condenser in electrolytic condenser to, make lower at work ambient temperature not become problem.Yet when when work stoppage (example as in the night) restarts to store work afterwards, lower ambient temperature may be problematic.When the electrolytic condenser of intermediate circuit arrangement has been cooled in a lower ambient temperature and when its capacity has reduced accordingly due to this work stoppage, this may cause overcurrent and/or the overvoltage in inverter inside starting when PV system and inverter are carried out electrical network storage work.Reason is, the inverter internal regulation device of being responsible for the power semiconductor in control inverter bridge is not set on the boundary condition after change, and these boundary conditions are that the electric capacity that arranges by intermediate circuit reduces and produces.
In order to address this problem, be known that, an extra firing equipment arranging for this intermediate circuit is set, by this firing equipment, these electrolytic condensers can be warmed before starting PV system, made them have sufficient electric capacity for the adjusting device of inverter is correctly worked.Yet, for the electrolytic condenser of this intermediate circuit arrangement arrange a separated heater be to extra expend relevant with extra cost.
Therefore, an object of the present utility model is to provide a kind of inverter, even wherein in the situation that there is no extra heater, storage work also can be carried out under lower ambient temperature, and does not occur overcurrent and/or superpotential danger.
This object by a kind of inverter, be particularly useful for photovoltaic system, for electrical power is stored into, the inverter of an energy supply network realizes, this inverter has an intermediate circuit arrangement and a plurality of semiconductor power switch, these semiconductor powers open the light and control by a control device, it is characterized in that, this inverter has the temperature of at least one temperature sensor for determining that this intermediate circuit arranges; And this control device is adapted to be, the in the situation that of in electrical power not being stored into this energy supply network, depend on that temperature controls these semiconductor power switchs, to preheat this intermediate circuit arrangement with the heat dissipation of inverter.
A kind of for starting the method for photovoltaic system, this photovoltaic system have one with intermediate circuit arrangement according to inverter of the present utility model and be adapted for electrical power be stored in an energy supply network, there is following step: operate this inverter, it is disconnected from this energy supply network simultaneously.Yet preheat this intermediate circuit arrangement with the heat dissipation of this inverter.Once this intermediate circuit arrangement has reached one higher than the temperature of predetermined minimum working temperature, just this inverter is connected with energy supply network and electrical power is stored in this energy supply network.Predetermined minimum working temperature has provided following temperature at this: at this, more than temperature, inverter is correctly worked, and especially has the adjusting device of correct work.In this meaning, this temperature also can be seen as minimum temperature.
This inverter thus serves as and preheats the thermal source that this intermediate circuit arranges, and its mode for not operating this inverter with this energy supply network in the situation that being connected.Do not need separated heater.Just carry out when having reached this more than predetermined minimum working temperature temperature when this intermediate circuit arrangement and being connected and storage work of this energy supply network, guaranteed the correct adjusting to inverter in storage work.
In one of the method favourable design, before preheating and/or in process, measure the temperature of intermediate circuit arrangement and it is compared with predetermined minimum working temperature.Alternatively, can carry out the stage of preheating continue one predetermined time length, wherein this time span depends on that the temperature value of an ambient temperature or an intermediate circuit arrangement of measuring in advance selects.So, directly measure for reach predetermined minimum working temperature required preheat time span, or by time span, the known dependence of ambient temperature is determined.
In another favourable design of the method, due to conversion process
in at least one capacitor of this intermediate circuit arrangement self, produce dissipation power.By this conversion process, for example the suitable switch (beat effect (Takten)) of the semiconductor power switch by this inverter causes, carries out from inside and therefore preheating capacitor fast and effectively.
Additionally, according to another favourable design of the method, the heat dissipation producing due to the switching process in the semiconductor power switch of this inverter is directed into this intermediate circuit arrangement, for example, by means of a heat bridge.
One according to inverter of the present utility model, be particularly useful for photovoltaic system, be used for electrical power to be stored in an energy supply network, comprise an intermediate circuit arrangement and a plurality of semiconductor power switch, this arrangement preferably has at least one electrolytic condenser, and these semiconductor power switchs are controlled by a control device.Its salient point is for determining at least one temperature sensor of the temperature that this intermediate circuit arranges.In addition, this control device is adapted to be, and in the situation that electrical power not being stored into energy supply network, depends on that temperature controls these semiconductor power switchs, to preheat this intermediate circuit arrangement with the heat dissipation of inverter.This has produced the advantage of narrating relatively with the method.
This temperature sensor can directly be arranged in this intermediate circuit arrangement place at this.But also can imagine, adopt a temperature sensor that is arranged in an other position in this PV system, an ambient temperature for example, to judge the temperature that this intermediate circuit arranges after longer work stoppage.
In one of this inverter favourable design, be provided with a heat bridge, this heat bridge arranges calorifics ground to be connected with these semiconductor power switchs this intermediate circuit.Except the heat dissipation occurring in intermediate circuit arrangement self, the heat dissipation that can also use in this way other to occur in inverter.Preferably this heat bridge has Heat Conduction Material and/or heat pipe or comprises a ventilation blower and an air guide channel or a wireway.Can be by the heat dissipation of semiconductor power switch in the situation that do not have large expending to be delivered in this intermediate circuit arrangement with this form.The solution with this ventilation blower and air guide channel or wireway also provides following advantage, and semiconductor power switch connects with the heat of intermediate circuit arrangement and can easily control by the rotating speed that is switched on or switched off this ventilation blower or reconciles this ventilation blower.
To by means of two accompanying drawings, describe the utility model in detail by an embodiment below.Accompanying drawing illustrates:
Fig. 1 is a connection block diagram in PV system, and
Fig. 2 is a kind of for starting the flow chart of the method for PV system.
Fig. 1 is usingd and is schematically connected block diagram and shown a PV system as the energy supplying system for storing to energy supply network.This PV system has a PV generator 1, and this generator is connected with an inverter 10 by DC wire 2.Inverter 10 is exported 3 with a sinusoidal wave filter 4 and subsequently for example, by a switching mechanism 5 (protector), is connected with a transformer 6 by an inverter current at outlet side.Transformer 6 is connected with an energy supply network 7 at outlet side, being stored in this energy supply network by PV generator 1 electrical power that produce and conversion in inverter 10.
PV generator 1 is that the switch symbols by an independent PV battery come symbol to represent in Fig. 1.It should be understood that this PV generator 1 shown in can be by a plurality of PV module structures in an implementation of PV system, these modules are series connection and/or connect in parallel.
Shown PV system designed to be used in a three-phase energy supply network 7 and stores.It is only exemplary that the ratio of three phases is interpreted as.The application's inverter 10 and PV system being configured to thus can be suitable for carrying out work, being particularly suitable for single-phase work with any phase amount equally.In an illustrated embodiment, inverter 10 is connected with energy supply network 7 with transformer 6 by the sinusoidal wave filter 4 of the signal shaping of the output current for inverter 10.This is only also an exemplary design of PV system.According to the application's method, can carry out with following inverter equally, this inverter is not in the situation that have middle connection of transformer to be connected with this energy supply network 7.Accordingly, according to the application's inverter, can form for this type of transformerless work.For the reason of simplicity, the other element of PV system, the switching mechanism of the switching mechanism of DC side (DC-direct current) or other AC (AC-alternating current) for example, for example system separators or insurance institution do not reproduce in Fig. 1.
Inverter 10 comprises the DC/DC converter 11 of an input side in an illustrated embodiment, and this converter is connected with the DC/AC converter 13 of an outlet side by an intermediate circuit.In this intermediate circuit, arranging has an intermediate circuit to arrange 12, and this arrangement has at least one capacitor 121, especially an electrolytic condenser.Conventionally, in an implementation of this intermediate circuit arrangement 12, be connected to each other a plurality of Parallel-connected Capacitors and/or part series connected type.It should be noted, a DC/DC converter that can also be constructed to not have input side according to the application's inverter, wherein this intermediate circuit arranges 12 to be directly connected with this DC wire 2.
For control inverter 10 and especially in order to be controlled in DC/DC converter 11 and DC/AC converter 13 semiconductor power switch using, inverter 10 has a control device 14.Conventionally, switching mechanism 5 is also to be handled by this control device 14, thus when inverter 10 by PV generator 1 provide one enough for store power time, carry out the output 3 of inverter 10 and being connected of this energy supply network 7.Control device 14 is also adapted to be conventionally; a working point of this PV generator 1 is set by suitably controlling DC/DC converter 11; for example as follows; carry out a so-called MPP (maximum power point) method for tracing, the method is for operating this PV generator 1 in the working point of a maximum power.
At one, according in the design of the application's inverter 10, in intermediate circuit, arrange 12 places or wherein arrange to have a temperature sensor 15, this temperature sensor is connected for measuring the temperature T of these capacitors 121 in calorifics with capacitor 121.Temperature sensor 15 is connected with control device 14, makes it possible to read in that intermediate circuit arranges 12 temperature and the temperature of the capacitor 121 that uses especially there.
In addition, between DC/AC converter 13 and intermediate circuit arrangement 12, be formed with a heat bridge 16.Heat bridge 16 makes it possible to carry out from DC/AC converter 13 to intermediate circuit arrangement 12 heat transmission.In addition, heat bridge 16 within DC/AC converter 13 with the conversion dissipation power of DC/AC converter 13 and therefore send hot parts and be connected.These parts are especially arranged in the semiconductor power switch of one or more inverter bridges of the outlet side of DC/AC converter 13.In intermediate circuit, arrange 12 places or wherein, heat bridge 16 stops as follows, from the thermal conductance of its transmission, send a telegraph the heating of container 121.
Heat bridge 16 can form by the element of a heat conduction, for example solid copper bar or aluminium bar or also can be by one or more braids with cross section taken in correspondence (Litzen) that are comprised of these materials.In another design, heat bridge 16 can be alternatively or is additionally had one or more so-called heat pipes (heat pipe), and in this heat pipe, heat is transmitted by gas transport and/or fluid transport and phase transition process.What also can imagine is, heat bridge 16 forms by the air-flow of a corresponding conduction, for example as follows, the used heat producing in DC/AC converter 13 is passed to intermediate circuit by a ventilation blower and air guide channel or soft air-guide pipe and arranges 12.Latter event provides following advantage, and the amount of instant heating transmission is controlled by the rotating speed of ventilation blower.Especially can when inoperation ventilation blower, interrupt heat transmission.
The control device 14 of inverter 10 is adapted to be, and measures intermediate circuit arrange 12 temperature T by this temperature sensor 15.When the temperature T of especially determining this intermediate circuit arrangement 12 when the start-up course of inverter 10 starts is in a predetermined minimum temperature T
0when following, the inverter bridge of DC/AC converter 13 operates by the control (beat effect) of its semiconductor power switch, however with energy supply network 7 not in being connected.Be connected and can for example by controlling accordingly the switching mechanism 5 of AC, realize with the separated of energy supply network 7 or shortage.
Even without stores power in energy supply network 7, the beat effect of the semiconductor power switch of inverter bridge also causes the heating of semiconductor power switch, because for example by power being transformed with output 3 sine wave filters that join 4 that exchange of inverter 13.At this, semiconductor power switch can so operate, and direct current is undertaken by a known poor efficiency to the conversion of alternating current.
The heat producing is delivered to intermediate circuit arrangement 12 by heat bridge 16 and is especially delivered to there on capacitor 121, with to its heating.In this operating state, inverter 10 is preferably operated, until measure one higher than predetermined minimum temperature T by temperature sensor 15
0temperature T.Then just carry out inverter 10 to the connection of this energy supply network 7.Guaranteed in this way to only have capacitor 121 when intermediate circuit arrangement 12 to there is one and be greater than T
0enough temperature and when electric capacity enough for the correct storage work of DC/AC converter 13 can be provided, just carry out the work of inverter 10 under condition of storage.
Except by the heating of hot path 16, the intermediate circuit that the beat effect of the semiconductor power switch by inverter bridge causes arranges the voltage fluctuation at 12 places also to cause electric charge to inflow and outflow in capacitor 121.In this conversion process, heat is directly released in capacitor 121.This heat, is additional to by heat bridge 16 and is transferred to the heat in intermediate circuit arrangement 12, has promoted the heating of capacitor 121.At one of inverter 10, alternatively in design, this heat can be used individually, so that intermediate circuit arranges 12 temperature that arrive an applicable job.In one of inverter 10 this type of design, can cancel heat bridge 16.
Fig. 2 illustrates for starting the flow chart of a method for optimizing of the PV system with the utility model inverter.The method can be for example implemented by the control system 14 of the inverter 10 of Fig. 1.Therefore, will use the Reference numeral of Fig. 1 to be exemplarily described hereinafter.
The initial situation of the method is the operating state of following PV system, in this operating state, in energy supply network 7, does not store, and the switching mechanism 5 of the inverter 10 wherein especially arranging at the outlet side of inverter 10 is separated with energy supply network 7.
In first step S1, the DC wire 2 from PV generator 1 by inverter 10 provides a voltage, and this voltage is enough to operating voltage and the microcontroller existing in control device 14 of starting to one of inverter 10 supply self.
In a follow-up step S2, from control device 14, by temperature sensor 15, measure intermediate circuit and arrange a temperature T of 12.Measured temperature T and a work temperature that predetermined minimum is necessary
0(minimum temperature) compares, and under this minimum temperature, the electric capacity of intermediate circuit arrangement 12 is too small and can not make inverter 10 have no jeopardously to carry out storage work.When measured temperature T is at minimum temperature T
0under time, the method is branched off into next step S3.
In this step S3, under control device 14 is controlled, the inverter bridge of this DC/AC converter 13 carries out beat effect, and does not occur to the storage in energy supply network 7.By the beat effect of semiconductor power switch, in inverter 13, carry out direct current to the conversion of alternating current, this electric current flows in sinusoidal wave filter 4.Current draw by the pulsed from intermediate circuit is carried out the conversion process capacitor 121, and this process heats capacitor.If there is extraly a heat bridge 16 between DC/AC converter 13 and intermediate circuit arrangement 12, carry out extra heat by the heat dissipation for example transforming to intermediate circuit arrangement 12 so in semiconductor power switch and input.If heat bridge 16 can switch, it enables accordingly in this step S3 so.For example, when used heat is guided to intermediate circuit and is arranged 12 from DC/AC converter 13 by a controllable ventilation blower, the heat bridge 16 that existence can switch.
In the embodiment shown in Figure 2, the preheating of inverter bridge be operated in step S3, carry out one predetermined time length, wherein this time span is selected as, and makes to adopt enough heating.Length can depend on a measured ambient temperature or depend on that the temperature T of measuring selects in step S2 at this predetermined time this, for example, by means of a form storage and that empirical formula obtains.Then, the method is proceeded with step S4, and wherein inverter 10 operates in a normal storage job, and produces accordingly the connection to energy supply network 7, for example, by by the switching mechanism of the AC of opening before 5 closures always.
When having determined that in step S2 the temperature T of intermediate circuit arrangement 12 has been more than or equal to this minimum temperature T when the method starts
0, the method direct descendant in the situation that walking around step S3 arrives step S4 so.
At one of the method, alternatively in design, can propose, after step S3 finishes the method again branch get back to step S2 and automatically with step S4, do not proceed.In the case, remeasure temperature T and by itself and minimum temperature T
0compare, and re-execute in due course step S3 and continue this length predetermined time.In this design, guarantee, only the enough Gao Shicai of temperature in intermediate circuit arrangement 12 enter the normal work in step S4.
In another of the method alternatively designs, can exchange step S2 and the order of S3.In this type of a design, the work that preheats in step S3 first carried out after step S1 continue one predetermined time length, and then measure and check temperature T.Only in temperature T, reach enough value and be greater than this minimum temperature T
0or equal this minimum temperature T
0time, the method is proceeded with step S4.Otherwise the method Xiang Hui branch and re-execute step S3, its mode is for to carry out beat effect by the inverter bridge of DC/AC converter 13, and do not carry out storage work.In the case, the time span that preheats step S3 can be selected as shorter, because guaranteed, when the temperature T of intermediate circuit arrangement 12 is still not high enough, repeats this step repeatedly.
In another alternative design of the method, can also be alternative in temperature survey and carry out the direct measurement to the electric capacity of intermediate circuit arrangement 12.So implement or repeat to preheat step S3, until intermediate circuit arrangement 12 has reached enough electric capacity.Other parameters (can be judged the reduction of the electric capacity being caused by temperature by these parameters) of intermediate circuit arrangement 12 also can for example, for the control of the method, series equivalent resistance.
list of numerals
1 PV generator
2 DC wires
3 inverter current outputs
4 sinusoidal wave filters
5 separating mechanisms
6 transformers
7 energy supply networks
10 inverters
11 DC/DC converters
12 intermediate circuit arrangements
121 capacitors
13 DC/AC converters
14 control device
15 temperature sensors
16 heat bridges
S1-S4 step
T temperature
T
0minimum working temperature (minimum temperature)
Claims (6)
1. inverter (10), be particularly useful for photovoltaic system, be used for electrical power to be stored in an energy supply network (7), this inverter has an intermediate circuit arrangement (12) and a plurality of semiconductor power switch, these semiconductor power switchs are controlled by a control device (14), it is characterized in that
This inverter (10) has at least one temperature sensor (15) and arranges the temperature (T) of (12) for determining this intermediate circuit; And
This control device (14) is adapted to be, the in the situation that of in electrical power not being stored into this energy supply network (7), depend on that this temperature (T) controls these semiconductor power switchs, to preheat this intermediate circuit with the heat dissipation of this inverter (10), arrange (12).
2. inverter according to claim 1 (10), wherein this intermediate circuit arranges (12) to have at least one electrolytic condenser.
3. inverter according to claim 1 and 2 (10), is wherein provided with a heat bridge (16), and this heat bridge arranges (12) calorifics ground to be connected with these semiconductor power switchs this intermediate circuit.
4. inverter according to claim 3 (10), wherein this heat bridge (16) has a kind of material and/or heat pipe of heat conduction.
5. inverter according to claim 3 (10), wherein this heat bridge (16) comprises a ventilation blower and an air guide channel or a wireway.
6. inverter according to claim 1 (10), this inverter is adapted to be, and produces heat dissipation be used for preheating this intermediate circuit arrangement (12) by the conversion process at least one capacitor (121) in this intermediate circuit arrangement (12) self.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102013104343.7 | 2013-04-29 | ||
| DE102013104343 | 2013-04-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203851018U true CN203851018U (en) | 2014-09-24 |
Family
ID=50821923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420199383.5U Expired - Lifetime CN203851018U (en) | 2013-04-29 | 2014-04-23 | Inverter used for storing electric power in energy supply network, specially for photovoltaic system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN203851018U (en) |
| DE (1) | DE202014101916U1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011106632B4 (en) * | 2011-06-17 | 2013-07-04 | Sma Solar Technology Ag | Inverter with monitoring of the moisture condition and operating procedure |
| AT518194B1 (en) | 2016-01-29 | 2020-10-15 | B & R Ind Automation Gmbh | Method and device for determining the temperature of an intermediate circuit capacitor |
| CN106014953B (en) * | 2016-07-25 | 2017-11-10 | 浙江天赐新能源科技有限公司 | The photovoltaic water pump controller and control method of automatic preheating |
| DE102020103166A1 (en) | 2020-02-07 | 2021-08-12 | Hanon Systems | Procedure for preheating an intermediate circuit capacitance |
-
2014
- 2014-04-23 CN CN201420199383.5U patent/CN203851018U/en not_active Expired - Lifetime
- 2014-04-23 DE DE202014101916.2U patent/DE202014101916U1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE202014101916U1 (en) | 2014-05-12 |
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