CN105356511B - A kind of autocontrol method and device of photovoltaic generating system direct current side apparatus - Google Patents
A kind of autocontrol method and device of photovoltaic generating system direct current side apparatus Download PDFInfo
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Abstract
This application discloses the autocontrol methods and device of a kind of photovoltaic generating system direct current side apparatus, wherein this method comprises: when multistage photovoltaic generating system is in standby, if desired control is adjusted to photovoltaic generating system direct current side apparatus, then by the electric parameter signal modulation of DC/DC converter input side at the signal that can control the photovoltaic generating system direct current side apparatus execution corresponding actions.Based on this, the application realizes the automatic control of photovoltaic generating system direct current side apparatus, and cost of implementation is low.
Description
Technical field
The present invention relates to technical field of photovoltaic power generation, more specifically to a kind of photovoltaic generating system direct current side apparatus
Autocontrol method and device.
Background technique
Photovoltaic generating system direct current side apparatus (such as direct current conflux case, photovoltaic junction box, DC power distribution cabinet), photovoltaic group
Part, DC/DC converter, DC/AC converter etc. are the important component of multistage photovoltaic generating system, the monitoring of working condition
And maintenance is most important to the safe and stable operation of multistage photovoltaic generating system.
For the automatic control for realizing photovoltaic generating system direct current side apparatus, photovoltaic generating system direct current side apparatus is usual
Configured with communication module (such as Wi-Fi module, RS-485 communication module), but cost of implementation is too high, for example: in multi-stage light
In photovoltaic generating system, each photovoltaic module is all separately configured one and is used to cut off from the photovoltaic group string where the photovoltaic module
With the photovoltaic junction box for accessing the photovoltaic module, the photovoltaic junction box can be in the case where configuring communication module according to upper
The control command that machine issues executes corresponding actions automatically；But often there are numerous a photovoltaics to connect in a multistage photovoltaic generating system
Wire box, if will lead to multistage photovoltaic generating system hardware cost and construction if each photovoltaic junction box configuration communication module
Cost is significantly increased.
Summary of the invention
In view of this, the present invention provides the autocontrol method and device of a kind of photovoltaic generating system direct current side apparatus, with
Realize the automatic control of photovoltaic generating system direct current side apparatus, and cost of implementation is low.
A kind of autocontrol method of photovoltaic generating system direct current side apparatus, comprising:
When multistage photovoltaic generating system is in standby, if desired photovoltaic generating system direct current side apparatus is adjusted
Section control, then by the electric parameter signal modulation of DC/DC converter input side at the photovoltaic generating system DC side can be controlled
The signal of equipment execution corresponding actions.
Wherein, when the signal that can control the photovoltaic generating system direct current side apparatus execution corresponding actions is time domain
When the signal that characteristic parameter changes according to default rule, the electric parameter signal modulation by DC/DC converter input side is at energy
Enough control the signal that the photovoltaic generating system direct current side apparatus executes corresponding actions, comprising:
Chop control is carried out to the switching device in DC/DC converter according to predetermined control strategy, so that the DC/DC becomes
The time domain charactreristic parameter of the electric parameter signal of parallel operation input side can change according to default rule.
Wherein, when the signal that can control the photovoltaic generating system direct current side apparatus execution corresponding actions is frequency domain
When the signal that characteristic parameter changes according to default rule, the electric parameter signal modulation by DC/DC converter input side is at energy
Enough control the signal that the photovoltaic generating system direct current side apparatus executes corresponding actions, comprising:
Chop control is carried out to the switching device in DC/DC converter according to predetermined control strategy, so that the DC/DC becomes
The frequency domain character parameter of the electric parameter signal of parallel operation input side can change according to default rule.
Optionally, by the electric parameter signal modulation of DC/DC converter input side at the photovoltaic power generation system can be controlled
During direct current side apparatus of uniting executes the signal of corresponding actions, the method also includes: keep DC bus-bar voltage not increase
Big arrive is more than given threshold.
Wherein, the holding DC bus-bar voltage will not increase above given threshold, comprising:
The duration and/or frequency, benefit that the electric parameter signal of the DC/DC converter input side is modulated using limitation
With energy storage device from extracting energy on dc-link capacitance, improve in power consumption these three schemes on dc-link capacitance
The combination of one or any of several keeps the DC bus-bar voltage will not to increase above given threshold.
A kind of automatic control device of photovoltaic generating system direct current side apparatus, comprising:
Judging unit is needed for when multistage photovoltaic generating system is in standby, judging whether to meet to photovoltaic
The trigger condition of control is adjusted in electricity generation system direct current side apparatus；
Chop control unit, for when meeting the trigger condition, by the electric parameter signal of DC/DC converter input side
The signal that the photovoltaic generating system direct current side apparatus executes corresponding actions can be controlled by being modulated into.
Wherein, when the signal that can control the photovoltaic generating system direct current side apparatus execution corresponding actions is time domain
When the signal that characteristic parameter changes according to default rule, the chop control unit is to become according to predetermined control strategy to DC/DC
Switching device in parallel operation carries out chop control, so that the temporal signatures of the electric parameter signal of the DC/DC converter input side
Parameter can be according to the unit of default rule variation.
Wherein, when the signal that can control the photovoltaic generating system direct current side apparatus execution corresponding actions is frequency domain
When the signal that characteristic parameter changes according to default rule, the chop control unit is to become according to predetermined control strategy to DC/DC
Switching device in parallel operation carries out chop control, so that the frequency domain character of the electric parameter signal of the DC/DC converter input side
Parameter can be according to the unit of default rule variation.
Optionally, the automatic control device further include: compression limiter, in the chop control cell operation process
Middle holding DC bus-bar voltage will not increase above given threshold.
Wherein, the compression limiter is to be adjusted using limitation to the electric parameter signal of the DC/DC converter input side
The duration and/or frequency of system, using energy storage device from dc-link capacitance extracting energy, improve dc-link capacitance on function
Rate consumes one of these three schemes or any several combination to keep DC bus-bar voltage not increase above setting
The unit of threshold value.
It can be seen from the above technical scheme that the electric parameter signal of DC/DC converter input side is received tune by the present invention
As control command, the control command is transferred to photovoltaic generating system DC side by DC power line and sets waveform after system
It is standby, so that it is executed corresponding actions, to realize the automatic control of photovoltaic generating system direct current side apparatus.Due to above-mentioned tune
Process processed is chop control realization to be carried out to DC/DC converter existing in multistage photovoltaic generating system, and above-mentioned control is ordered
Enable is also that for existing DC power line as transmission medium, there is no need to additionally increase hardware using in multistage photovoltaic generating system
Cost.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of autocontrol method process of photovoltaic generating system direct current side apparatus disclosed by the embodiments of the present invention
Figure；
Fig. 2 is a kind of multistage photovoltaic generating system structural schematic diagram disclosed by the embodiments of the present invention；
Fig. 3 a is a kind of waveform that the voltage of DC/DC converter input side changes over time disclosed by the embodiments of the present invention
Figure；
Fig. 3 b is a kind of waveform that the electric current of DC/DC converter input side changes over time disclosed by the embodiments of the present invention
Figure；
Fig. 4 is that a kind of automatic control device structure of photovoltaic generating system direct current side apparatus disclosed by the embodiments of the present invention is shown
It is intended to；
Fig. 5 is the automatic control device structure of another photovoltaic generating system direct current side apparatus disclosed by the embodiments of the present invention
Schematic diagram.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, the embodiment of the invention discloses a kind of autocontrol method of photovoltaic generating system direct current side apparatus, with
Realize the automatic control of photovoltaic generating system direct current side apparatus, and cost of implementation is low, this method comprises:
Step 101: when multistage photovoltaic generating system is in standby, judging whether to need straight to photovoltaic generating system
Control is adjusted in stream side apparatus, if desired, enters step 102；Otherwise, 101 are returned to step.
Step 102: by the electric parameter signal modulation of DC/DC converter input side at the photovoltaic generating system can be controlled
The signal of direct current side apparatus execution corresponding actions.
Multistage photovoltaic generating system refers to the photovoltaic at least 1 grade DC/DC converter and at least 1 grade DC/AC converter
Electricity generation system.Fig. 2 shows a kind of existing multistage photovoltaic generating system structural schematic diagrams, comprising: input termination DC bus,
The DC/AC converter of output end access power grid；Meet the dc-link capacitance Cbus on DC bus；It connects in PV
The capacitor Cpv of (photovoltaic, photovoltaic) side；And using Cpv as input capacitance, using Cbus as the DC/ of output capacitance
DC converter.PV component, the photovoltaic generating system direct current side apparatus for including in the multistage photovoltaic generating system are respectively positioned on the side PV,
It is not shown in Fig. 2.
It is described in detail for convenience of the working principle of the subsequent technical solution described in the present embodiment, " DC/DC will be converted below
The electric parameter signal modulation of device input side executes the letter of corresponding actions at that can control the photovoltaic generating system direct current side apparatus
Number " process, " the chop control mode " of referred to as multistage photovoltaic generating system.
The present embodiment is to avoid during realizing the automatic control of photovoltaic generating system direct current side apparatus, to more
The normal power generation of grade photovoltaic generating system impacts, therefore is only in standby in multistage photovoltaic generating system that (system waits for
DC/AC converter is without transformation of electrical energy under machine state；It should be noted that this standby mode can be the side PV input voltage or
Normal Standby caused by power is lower, is also possible to standby caused by multistage photovoltaic generating system disorderly closedown, it is also possible to more
Grade photovoltaic generating system executes standby caused by the halt instruction that issues of host computer, does not limit to) when just start the copped wave control
Molding formula.
When the multistage photovoltaic generating system being in standby encounters certain photovoltaic module damage, fire, photovoltaic array wiring
Abnormal, direct current input over-voltage, photovoltaic generating system DC side equipment power dissipation be excessively high, isolated island, PV insulation impedance are abnormal, PV was inputted
Pressure etc. is needed by the way that control is adjusted to photovoltaic generating system direct current side apparatus, to restore the peace of multistage photovoltaic generating system
Entirely, stablize, be reliable, efficient operation the case where when, it is necessary to be transferred to the chop control mode operation, to complete following task:
The control command answered to photovoltaic generating system direct current side apparatus output phase makes it execute corresponding actions, to guarantee multistage photovoltaic
The safe and stable, reliable of electricity generation system, efficient operation.
Wherein, multistage photovoltaic generating system can be with self-test to needing that photovoltaic generating system direct current side apparatus is adjusted
It controls, receive instruction information that host computer issues or staff starts emergency button etc. as needing to enter the copped wave control
The trigger condition of molding formula.
Under the chop control mode, the present embodiment receives modulation with the electric parameter signal of DC/DC converter input side
Waveform afterwards is exported as needs to the control command of photovoltaic generating system direct current side apparatus, modulated process specifically: is being needed
When exporting control command to photovoltaic generating system direct current side apparatus, just according to predetermined control strategy in DC/DC converter
Switching device carries out chop control, the electric parameter signal of DC/DC converter DC side is changed according to default rule, shape
At specific encoded information；The default rule is different, and obtained encoded information is just different, and different encoded informations just represents
Different control commands, thus realize automatically control photovoltaic generating system direct current side apparatus execute it is a variety of different.
Wherein, above-mentioned specific encoded information can be time domain charactreristic parameter (amplitude of such as voltage or electric current, opposite change
Change value, variation slope, waveform rise time or waveform fall time etc.) according to the signal of default rule variation, it is also possible to frequency
The signal that characteristic of field parameter (such as frequency size) changes according to default rule, it may be assumed that above-mentioned modulated process can be according to default control
System strategy carries out chop control to the switching device in DC/DC converter, so that the electric parameter of the DC/DC converter input side
The time domain charactreristic parameter of signal can be according to the process of default rule variation；It is also possible to according to predetermined control strategy to DC/DC
Switching device in converter carries out chop control, so that the frequency domain of the electric parameter signal of the DC/DC converter input side is special
Levying parameter can be according to the process of default rule variation.Wherein, the electric parameter signal can be voltage signal, current signal and
Any one in power signal or any several combination, do not limit to.
To make those skilled in the art better understand technical solution described in the present embodiment, carry out illustrating below
Bright: the present embodiment can control DC/DC converter to determine copped wave in a manner of duty ratio, initial shape to determine frequency under the chop control mode
Voltage, the current waveform difference of obtained DC/DC converter input side are as shown in Figure 3a and Figure 3b shows under state, wherein switch frequency
Rate is f, and period turn-on time is ton, and voltage relative changing value is Δ V, and electric current relative changing value is Δ I, then in chopping process
In: can with the amplitude of voltage or electric current, relative changing value, variation slope, waveform rise time or waveform fall time according to
Preset rules change the specific coding information to be formed as control command；Can also with the length of period turn-on time ton according to
Preset rules change the specific coding information to be formed as control command；It is also possible to be become with switching frequency f according to preset rules
Change the specific coding information formed and such as detect the frequecy characteristic of 80Hz as control command, or the frequency changed over time
Feature etc.；It is also possible to use the number of the specific coding information detected in a period of time as control instruction, such as at one section
Interior voltage relative changing value Δ V is more than threshold value 3 times；It is also possible to the combination with above-mentioned several ways, as detected 80Hz
Frequecy characteristic, and whithin a period of time voltage relative changing value Δ V more than threshold value 3 times.
By above description as can be seen that the electric parameter signal of DC/DC converter input side is received modulation by the present embodiment
Waveform afterwards is transferred to photovoltaic generating system direct current side apparatus by DC power line as control command, the control command,
It is set to execute corresponding actions, to realize full-automatic operation.Since above-mentioned modulated process is to multistage photovoltaic generating system
In existing DC/DC converter carry out chop control realization, and above-mentioned control command is also in multistage photovoltaic generating system
For existing DC power line as transmission medium, there is no need to additionally increase hardware cost.
It will do it power when in addition, it is contemplated that carrying out chop control to DC/DC converter under the chop control mode
It converts and transfers power on DC bus, if the mean power of transmission is more than to load (such as DC/AC converter on DC bus
Accessory power supply) consumption mean power, will DC bus-bar voltage be increased, until being more than that given threshold causes direct current female
Line capacitance Cbus breakdown, it is therefore desirable to which it is described to keep DC bus-bar voltage not increase above to take certain pressure limiting measure
Given threshold, such as: limiting the duration being modulated to the electric parameter signal of DC/DC converter input side and/or frequency (passes through
Shorten the duration being modulated and/or reduces what the number being modulated in the unit time was converted to reduce DC/DC converter
Power), using energy storage device (such as starting storage battery charging) from dc-link capacitance extracting energy, increase dc-link capacitance
On power consumption (such as additional load device of radiator fan, switching of starting DC/AC converter).The pressure limiting threshold value can
To be set to be lower than the overvoltage protection value of dc-link capacitance Cbus, to prevent triggering overvoltage protection.Certainly, if started more
It is not avoided that DC bus-bar voltage is more than the given threshold after all pressure limiting measures that grade photovoltaic generating system configures at present still,
Then for safety, copped wave can only be stopped.
In addition, referring to fig. 4, the embodiment of the invention also discloses a kind of automatic controls of photovoltaic generating system direct current side apparatus
Device, to realize the automatic control of photovoltaic generating system direct current side apparatus, and cost of implementation is low, comprising:
Judging unit 401 is needed for when multistage photovoltaic generating system is in standby, judging whether to meet to light
The trigger condition of control is adjusted in photovoltaic generating system direct current side apparatus；
Chop control unit 402, for when meeting the trigger condition, by the electric parameter of DC/DC converter input side
Signal modulation executes the signal of corresponding actions at that can control the photovoltaic generating system direct current side apparatus.
Wherein, the signal that can be controlled the photovoltaic generating system direct current side apparatus and execute corresponding actions, can be
Time domain charactreristic parameter is according to the signal of default rule variation, and corresponding, chop control unit 402 is according to predetermined control strategy pair
Switching device in DC/DC converter carries out chop control so that the electric parameter signal of the DC/DC converter input side when
Characteristic of field parameter can be according to the unit of default rule variation.
It, can also be with alternatively, the signal that the photovoltaic generating system direct current side apparatus can be controlled and execute corresponding actions
It is signal of the frequency domain character parameter according to default rule variation, corresponding, chop control unit 402 is according to predetermined control strategy
Chop control is carried out to the switching device in DC/DC converter, so that the electric parameter signal of the DC/DC converter input side
Frequency domain character parameter can be according to the unit of default rule variation.
Optionally, referring to Fig. 5, the automatic control device further include: in 402 course of work of chop control unit
DC bus-bar voltage is kept not increase above the compression limiter 403 of given threshold.
Wherein, compression limiter 403 is to be modulated using limitation to the electric parameter signal of the DC/DC converter input side
Duration and/or frequency, using energy storage device from dc-link capacitance extracting energy, improve dc-link capacitance on power
One of these three schemes or any several combination are consumed to keep DC bus-bar voltage not increase above setting threshold
The unit of value.
In conclusion the electric parameter signal of DC/DC converter input side is received modulated waveform as control by the present invention
System order, the control command are transferred to photovoltaic generating system direct current side apparatus by DC power line, execute it corresponding dynamic
Make, to realize the automatic control of photovoltaic generating system direct current side apparatus.Since above-mentioned modulated process is to multi-stage light
Existing DC/DC converter carries out chop control realization in photovoltaic generating system, and above-mentioned control command is also with multistage photovoltaic
For existing DC power line as transmission medium, there is no need to additionally increase hardware cost in electricity generation system.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments in the case where not departing from the spirit or scope of the embodiment of the present invention.Therefore,
The embodiment of the present invention is not intended to be limited to the embodiments shown herein, and be to fit to principles disclosed herein and
The consistent widest scope of features of novelty.
Claims (10)
1. a kind of autocontrol method of photovoltaic generating system direct current side apparatus characterized by comprising
When multistage photovoltaic generating system is in standby, control if desired is adjusted to photovoltaic generating system direct current side apparatus
System believes the electric parameter of DC/DC converter input side then by carrying out chop control to the switching device in DC/DC converter
Number it is modulated into specific encoded information, different encoded informations represents different control commands, and the control command is can to control
The signal that the photovoltaic generating system direct current side apparatus executes corresponding actions is made, the signal passes through the multistage photovoltaic power generation system
DC power line in system is transferred to the photovoltaic generating system direct current side apparatus；
The multistage photovoltaic generating system includes photovoltaic generating system direct current side apparatus, photovoltaic module, DC/DC converter and DC/
AC converter.
2. the method according to claim 1, wherein the photovoltaic generating system DC side can be controlled when described
It is described to convert DC/DC when equipment executes the signal that the signal of corresponding actions changes for time domain charactreristic parameter according to default rule
The electric parameter signal modulation of device input side executes the letter of corresponding actions at that can control the photovoltaic generating system direct current side apparatus
Number, comprising:
Chop control is carried out to the switching device in DC/DC converter according to predetermined control strategy, so that the DC/DC converter
The time domain charactreristic parameter of the electric parameter signal of input side can change according to default rule.
3. the method according to claim 1, wherein the photovoltaic generating system DC side can be controlled when described
It is described to convert DC/DC when equipment executes the signal that the signal of corresponding actions changes for frequency domain character parameter according to default rule
The electric parameter signal modulation of device input side executes the letter of corresponding actions at that can control the photovoltaic generating system direct current side apparatus
Number, comprising:
Chop control is carried out to the switching device in DC/DC converter according to predetermined control strategy, so that the DC/DC converter
The frequency domain character parameter of the electric parameter signal of input side can change according to default rule.
4. the method according to claim 1, wherein by the electric parameter signal tune of DC/DC converter input side
It is made to during controlling the signal that the photovoltaic generating system direct current side apparatus executes corresponding actions, the method is also wrapped
It includes: DC bus-bar voltage being kept not increase above given threshold.
5. according to the method described in claim 4, it is characterized in that, the holding DC bus-bar voltage will not be increased above and be set
Determine threshold value, comprising:
The duration and/or frequency that are modulated using limitation to the electric parameter signal of the DC/DC converter input side utilize storage
Can equipment from dc-link capacitance extracting energy, one of improve power consumption these three schemes on dc-link capacitance
Or any several combination keeps DC bus-bar voltage not increase above given threshold.
6. a kind of automatic control device of photovoltaic generating system direct current side apparatus characterized by comprising
Judging unit is needed for when multistage photovoltaic generating system is in standby, judging whether to meet to photovoltaic power generation
The trigger condition of control is adjusted in system dc side apparatus；
Chop control unit, for when meeting the trigger condition, by being cut to the switching device in DC/DC converter
Wave control, by the electric parameter signal modulation of DC/DC converter input side at specific encoded information, different encoded informations is represented
Different control commands, the control command can control the photovoltaic generating system direct current side apparatus and execute corresponding actions
Signal, the signal are transferred to the photovoltaic generating system direct current by the DC power line in the multistage photovoltaic generating system
Side apparatus；
The multistage photovoltaic generating system includes photovoltaic generating system direct current side apparatus, photovoltaic module, DC/DC converter and DC/
AC converter.
7. device according to claim 6, which is characterized in that the photovoltaic generating system DC side can be controlled when described
When equipment executes the signal that the signal of corresponding actions changes for time domain charactreristic parameter according to default rule, the chop control unit
To carry out chop control to the switching device in DC/DC converter according to predetermined control strategy, so that the DC/DC converter is defeated
The time domain charactreristic parameter for entering the electric parameter signal of side can be according to the unit of default rule variation.
8. device according to claim 6, which is characterized in that the photovoltaic generating system DC side can be controlled when described
When equipment executes the signal that the signal of corresponding actions changes for frequency domain character parameter according to default rule, the chop control unit
To carry out chop control to the switching device in DC/DC converter according to predetermined control strategy, so that the DC/DC converter is defeated
The frequency domain character parameter for entering the electric parameter signal of side can be according to the unit of default rule variation.
9. device according to claim 6, which is characterized in that further include: compression limiter, in the chop control list
DC bus-bar voltage is kept not increase above given threshold in first course of work.
10. device according to claim 9, which is characterized in that the compression limiter is to be become using limitation to the DC/DC
Duration and/or frequency that the electric parameter signal of parallel operation input side is modulated are taken out from dc-link capacitance using energy storage device
It one of takes energy, improve power consumption these three schemes on dc-link capacitance or any several combination keeps straight
Stream busbar voltage will not increase above the unit of given threshold.
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| CN201510897749.5A CN105356511B (en) | 2015-12-04 | 2015-12-04 | A kind of autocontrol method and device of photovoltaic generating system direct current side apparatus |
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| CN111565021A (en) * | 2019-02-14 | 2020-08-21 | 阳光电源股份有限公司 | Component voltage limiting circuit and application device thereof |
| US11264804B2 (en) | 2019-02-14 | 2022-03-01 | Sungrow Power Supply Co., Ltd. | Circuit for component voltage limitation, and apparatus for applying the same |
| CN111565020A (en) * | 2019-02-14 | 2020-08-21 | 阳光电源股份有限公司 | Component voltage limiting method and application device and system thereof |
| TWI730802B (en) * | 2020-06-05 | 2021-06-11 | 安沛科技股份有限公司 | Control system and method of charging device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253278A (en) * | 2011-04-25 | 2011-11-23 | 上海正泰电源系统有限公司 | Startup condition detection method suitable for photovoltaic inverter with DC/DC (direct current/direct current) |
| CN103763812A (en) * | 2013-10-28 | 2014-04-30 | 湖南信息科学职业学院 | DSP-based solar semiconductor illumination system and control method thereof |
| CN104160577A (en) * | 2012-01-17 | 2014-11-19 | 英飞凌科技奥地利有限公司 | Power converter circuit, power supply system and method |
| CN104734553A (en) * | 2013-12-24 | 2015-06-24 | 珠海格力电器股份有限公司 | Converter, photovoltaic power generation system and control method of photovoltaic power generation system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8159178B2 (en) * | 2009-08-21 | 2012-04-17 | Xantrex Technology Inc. | AC connected modules with line frequency or voltage variation pattern for energy control |
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- 2015-12-04 CN CN201510897749.5A patent/CN105356511B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253278A (en) * | 2011-04-25 | 2011-11-23 | 上海正泰电源系统有限公司 | Startup condition detection method suitable for photovoltaic inverter with DC/DC (direct current/direct current) |
| CN104160577A (en) * | 2012-01-17 | 2014-11-19 | 英飞凌科技奥地利有限公司 | Power converter circuit, power supply system and method |
| CN103763812A (en) * | 2013-10-28 | 2014-04-30 | 湖南信息科学职业学院 | DSP-based solar semiconductor illumination system and control method thereof |
| CN104734553A (en) * | 2013-12-24 | 2015-06-24 | 珠海格力电器股份有限公司 | Converter, photovoltaic power generation system and control method of photovoltaic power generation system |
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