CN202395652U - Control device of auxiliary power source of photovoltaic inverter and control device of photovoltaic inverter - Google Patents
Control device of auxiliary power source of photovoltaic inverter and control device of photovoltaic inverter Download PDFInfo
- Publication number
- CN202395652U CN202395652U CN 201120347790 CN201120347790U CN202395652U CN 202395652 U CN202395652 U CN 202395652U CN 201120347790 CN201120347790 CN 201120347790 CN 201120347790 U CN201120347790 U CN 201120347790U CN 202395652 U CN202395652 U CN 202395652U
- Authority
- CN
- China
- Prior art keywords
- power supply
- voltage
- photovoltaic
- accessory power
- control device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- 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
- Inverter Devices (AREA)
Abstract
The utility model discloses a control device of an auxiliary power source of a photovoltaic inverter. The auxiliary power source controls the switching of an inverter module according to the switching state of the auxiliary power source itself. The control device includes a control module. The control module controls the switching of the auxiliary power source according to a photovoltaic voltage output by a solar battery. The utility model also discloses a control device of the photovoltaic inverter. The control device of the photovoltaic inverter includes a solar cell module, an inverter module, a control module and an auxiliary power source. In the utility model, the control module controls the switching of the auxiliary power source through judging an input photovoltaic voltage, thereby making the auxiliary power source only work in a time period in which the photovoltaic voltage is in a certain range. And the control module controls the switching of an inverter system according to a switching state of the auxiliary power source. Thus, an inverted can be guaranteed to switch off in a time period in which the photovoltaic voltage is not in a certain range. Therefore, the system loss is reduced, the aim of saving energy is realized, and the prolongation of the service lifetime of the inverter module is facilitated.
Description
Technical field
The utility model relates to the photovoltaic power generation technology field, relates in particular to a kind of control device of auxiliary power supply of photovoltaic inverter and a kind of control device of photovoltaic DC-to-AC converter.
Background technology
The way to take power that at present auxiliary power supply of photovoltaic inverter is commonly used is divided into from the power taking of photovoltaic DC-to-AC converter dc bus, from the grid side power taking, from three kinds of electrical network and the complementary power takings of photovoltaic DC-to-AC converter dc bus.Wherein, preceding two kinds of ways to take power are single way to take power, and its reliability is low, when input source is unusual, will cause whole inverter system outage; The third way to take power is two complementary ways to take power, and the input of accessory power supply is all stablized than preceding dual mode, thereby has guaranteed that inverter system can stablize output.Therefore, adopt the third way to take power (promptly from electrical network and the complementary way to take power of inverter dc bus) at present usually.Yet; Though the PV in morning (photovoltaic, photovoltaic) voltage is low or do not have PV voltage a night, make inverter system still can normally move because of the grid side power supply from this mode of electrical network and the power taking of photovoltaic DC-to-AC converter dc bus; Thereby make and rely on the veneer of accessory power supply output power supply to be in the working loss state always; Not only consume the energy, increased the unnecessary loss of system, also shortened the useful life of devices such as IC simultaneously.Along with improving constantly of energy-conservation requirement; People are more and more lower to the requirement of photovoltaic DC-to-AC converter stand-by power consumption at night, and, under this way to take power; If will reduce the idling consumption of photovoltaic DC-to-AC converter under the situation in night, need the input of the grid side of artificial cut-out accessory power supply.
Therefore, when auxiliary power supply of photovoltaic inverter adopts from electrical network and the complementary way to take power of inverter dc bus technological, how to reduce system loss, the realization environmental protection and energy saving need to be resolved hurrily.
The utility model content
The utility model technical problem to be solved is a kind of control method and device of auxiliary power supply of photovoltaic inverter to be provided, to reach reduction system loss realization purpose of energy saving.
An aspect according to the utility model; A kind of control device of auxiliary power supply of photovoltaic inverter is provided; Said accessory power supply is used for the startup and shutdown according to the keying State Control inverter module of self; Said control device comprises: control module is used for the opening and closing according to the said accessory power supply of photovoltaic voltage control of solar cell output.
Further, said control module comprises: judge submodule, be used for said photovoltaic voltage is judged; If said photovoltaic voltage is more than or equal to preset cut-in voltage; Then generate the accessory power supply start signal,, then generate the accessory power supply shutdown signal if said photovoltaic voltage is closed voltage less than preset; Open and close submodule, be used for opening accessory power supply or closing accessory power supply according to said accessory power supply shutdown signal according to said accessory power supply start signal.
Further, said judgement submodule comprises: difference channel is used for said photovoltaic voltage is carried out difference processing; Hysteresis comparator circuit; Be used for generating preset cut-in voltage or the preset voltage of closing,, generate the accessory power supply start signal when photovoltaic voltage during greater than preset cut-in voltage according to the hysteresis comparator voltage threshold of setting; When photovoltaic voltage when closing voltage, generates the accessory power supply shutdown signal less than preset.
Further, the control device of said auxiliary power supply of photovoltaic inverter also comprises: the power module that is connected with AC power is used to said control module power supply is provided.
Another aspect according to the utility model; A kind of control device of photovoltaic DC-to-AC converter is provided; Comprise solar module, inverter module; Also comprise: control module and accessory power supply, said control module are used for the opening and closing according to the said accessory power supply of photovoltaic voltage control of solar cell output, and said accessory power supply is used for the startup and shutdown according to the said inverter module of keying State Control of self.
Further; Said control module comprises to be judged submodule and opens and closes submodule; Said judgement submodule is used for the photovoltaic voltage of input is judged, if said photovoltaic voltage more than or equal to preset cut-in voltage, then generates the accessory power supply start signal; If said photovoltaic voltage is closed voltage less than preset, then generate the accessory power supply shutdown signal; Said keying submodule is used for opening accessory power supply or closing accessory power supply according to said accessory power supply shutdown signal according to said accessory power supply start signal.
Further, said judgement submodule comprises: difference channel is used for said photovoltaic voltage is carried out difference processing; Hysteresis comparator circuit; Be used for generating preset cut-in voltage or the preset voltage of closing,, generate the accessory power supply start signal when photovoltaic voltage during greater than preset cut-in voltage according to the hysteresis comparator voltage threshold of setting; When photovoltaic voltage when closing voltage, generates the accessory power supply shutdown signal less than preset.
The beneficial effect of the utility model is: control module is through controlling the opening and closing of accessory power supply to the judgement of photovoltaic voltage of input; Make accessory power supply only be operated in the time of photovoltaic voltage conforms scope; And the startup and shutdown of the keying State Control inverter module through accessory power supply; Can guarantee that then inverter can not shut down in photovoltaic voltage meets time of certain scope; Thereby the reduction system loss reaches energy-conservation purpose, and helps prolonging the useful life of inverter module.
Description of drawings
Fig. 1 is the control device principle schematic of the auxiliary power supply of photovoltaic inverter of the utility model embodiment;
Fig. 2 is the circuit diagram of control module of the control device of the utility model embodiment auxiliary power supply of photovoltaic inverter;
Fig. 3 is the circuit diagram of accessory power supply of the control device of the utility model embodiment auxiliary power supply of photovoltaic inverter;
Fig. 4 is the circuit diagram of power module of the control device of the utility model embodiment auxiliary power supply of photovoltaic inverter;
Fig. 5 is the schematic flow sheet of the control method of the utility model embodiment auxiliary power supply of photovoltaic inverter.
Embodiment
Combine accompanying drawing that the utility model is done further explain through embodiment below.
The mentality of designing of the utility model embodiment is: based on the electrical network and the complementary way to take power of inverter dc bus of auxiliary power supply of photovoltaic inverter employing; Utilize solar array voltage as the necessary condition of opening accessory power supply; Control the open and close of auxiliary power supply of photovoltaic inverter according to the variation of solar array voltage; Control the startup and shutdown of photovoltaic DC-to-AC converter system through accessory power supply, thereby finally realize the purpose of energy-saving and emission-reduction.
Shown in Figure 1 is the principle schematic of control device of the auxiliary power supply of photovoltaic inverter of the utility model embodiment, comprising: solar module 10, control module 20, accessory power supply 30, inverter module 40, power module 50.Below each module is elaborated.
(1) solar cell 10: be the input source of the direct voltage PV of photovoltaic DC-to-AC converter system, when PV voltage be higher than preset when opening threshold value, the photovoltaic DC-to-AC converter system boot, when PV voltage be lower than preset when closing threshold value, the photovoltaic DC-to-AC converter system closedown.
(2) control module 20: be used for the opening and closing that come accessory power supply 30 according to the PV voltage control of solar cell 10 output.Control module 20 comprises to be judged submodule 210 and opens and closes submodule 220.Judge that submodule 210 is used for PV voltage is judged,,, then generate the accessory power supply shutdown signal if PV voltage is closed voltage less than preset if PV voltage more than or equal to preset cut-in voltage, then generates the accessory power supply start signal.Opened at accessory power supply under the situation of work, closed voltage if detect the PV voltage of input less than preset cut-in voltage and greater than preset, accessory power supply is operate as normal still.Opening and closing submodule 220 is used for opening accessory power supply or closing accessory power supply according to the accessory power supply shutdown signal according to the accessory power supply start signal.In the present embodiment, judge that submodule 210 comprises: difference channel 211 and hysteresis comparator circuit 212; Difference channel 211 is used for PV voltage is carried out difference processing; Hysteresis comparator circuit 212 is used for generating preset cut-in voltage or the preset voltage of closing according to the hysteresis comparator voltage threshold of setting; When PV voltage during greater than cut-in voltage; Generate the accessory power supply start signal, when photovoltaic voltage when closing voltage, generates the accessory power supply shutdown signal less than preset.Among other embodiment; Judge that the circuit that submodule comprises can not be difference channel and hysteresis comparator circuit, but the circuit of alternate manner, as long as this circuit can be reached the judgement to PV voltage; Make and work as PV voltage more than or equal to preset cut-in voltage; Then generate the accessory power supply start signal, close voltage less than preset, then generate the accessory power supply shutdown signal when PV voltage.
In a kind of instance, the circuit of control module 20 is as shown in Figure 2, and the dotted line left side is for judging the circuit diagram of submodule 210, and the dotted line right side is for opening and closing the circuit diagram of submodule 220.Among Fig. 2; Resistance R 6, R7, R8, R9 and resistance R 10, R11, R12, R13 decay to input PV voltage; And form difference channels with transport and placing device U4 (being LF353 in this example), resistance R 14, resistance R 15; Set up voltage follower by transport and placing device U5 (being LF353 in this example), form hysteresis comparator circuit by transport and placing device U6 (being LF393 in this example), resistance R 17, resistance R 19, resistance R 26, resistance R 18.Those skilled in the art can know according to the correlation technique of hysteresis comparator; The setting of hysteresis comparator voltage threshold is by resistance R 26 and R18 decision; Can set according to actual needs, can generate aforesaid preset cut-in voltage or the preset voltage of closing by the hysteresis comparator voltage threshold.Usually preset cut-in voltage is greater than the preset voltage of closing.In other instances, transport and placing device U4, U5, U6 can change TL082 into.
The circuit on dotted line right side is the output situation of left side circuit among Fig. 2, and the switching tube that drives internal circuit is opened or closed; And the output result on dotted line right side directly controls accessory power supply 30 work or quits work, and accomplishes this controlled function by the circuit that resistance R 21, resistance R 22, triode Q1 and resistance R 23, resistance R 24, triode Q2, optocoupler U2 form.The preset voltage of closing can be through the resistance sizes decision of hysteresis comparator.When PV voltage during greater than preset cut-in voltage, triode Q1, Q2 conducting, thereby optocoupler U2 conducting.
(3) accessory power supply 30 is used for the startup and shutdown according to the keying State Control inverter module 40 of self.In traditional Switching Power Supply, when satisfying the power supply initial conditions, give the power supply of PWM (Pulse Width Modulation, pulse width modulation) control IC simultaneously, the work of PWM control IC output control DC/DC transducer, accessory power supply work; Therefore, among the utility model embodiment, the cardinal principle of opening and closing accessory power supply 30 is to realize through the power supply of the PWM control IC of control accessory power supply.In other words; The operation principle of control module and accessory power supply is: according to the input of PV voltage, judge PV voltage and produce control signal, control signal driving switch pipe; Thereby the working power of control accessory power supply PWM IC; Reach the effect of control PWM IC, because the work of accessory power supply is controlled by PWM IC, so control PWM IC is with regard to suitable accessory power supply and whole inversion system.
The circuit of the 7th pin VCC of PWM control IC (being UC2845 in this example) only is provided in the circuit as shown in Figure 3, and circuit such as DC/DC, OUTPUT filtering, the electric FEEDBACK CONTROL of output can adopt existing techniques in realizing, are not described further at this.As shown in Figure 3, CN4, CN5 are complementary duplicate supply power input, and wherein CN4 is an ac input end; Diode D1, D2, D3, D4 built-up circuit carry out rectification to interchange; Resistance R 1, R2 and capacitor C 1, C2, C3, C4 form filter circuit, and voltage after the rectification is carried out filtering, and diode D5, D6, D7, D8 play non-return effect; The VCC of beginning UC2845 relies on the power supply of input power supply owing to power on; Reduce and the stabilized voltage power supply effect so R55, R56, ZD16 have played high voltage, it mainly is the VCC end power supply to UC2845, after the DC/DC module works together; Rely on the output backpower power supply of the feedback coil of transformer among the DC/DC, the control of triode Q6, Q8 has been passed through in the input of the VCC of UC2845.CN6 pin position connects one to one among the CN3 of Fig. 2 and Fig. 3, so 1 pin and the 2 pin conductings of optocoupler U2 conducting CN6 in Fig. 2, triode Q6, Q8 conducting are started working thereby UC2845 obtains power supply.In other instance, the PWM control IC can also be UC2842/UC2843/UC2844 or UC3842/UC3843/UC3844/UC3845.
(4) inverter module 40 directly is controlled by accessory power supply 30.When accessory power supply 30 work, inverter module 40 work; Close when accessory power supply 30, inverter module 40 is closed!
(5) power module 50 is connected with AC power, is used to control module 20 power supply is provided.The principle of power module 50 is to convert low-voltage direct to through the transformation to civil power, and function is for control power supply to be provided.
In a kind of instance; As shown in Figure 4; From grid side power taking 270VAC; Become low pressure from terminal CN2 entering through transformer T1, form rectifier bridge by diode D1, D2, D3, D4 low-voltage alternating-current is carried out rectification, after capacitor C1, C2, C3, C4, C5, C6, C11, C12 form filter circuit, give IC chip components and parts U1, U2 power supply.U1, U2 are respectively LM7812 and LM7912 in this example, and by its generation+15V and-15V power supply, its power master supplies power to IC; U3 is TL431, for the circuit in the control module provides 5V reference power supply; U1, U2, U3 can also be the IC chip components and parts of other types among other embodiment.Power module shown in Figure 2 can also adopt other form circuit diagrams to realize, for example, in Fig. 2, saves the value that capacitor C 1, C2 strengthen capacitor C 3 simultaneously, saves the value that capacitor C 4, C5 strengthen capacitor C 6 simultaneously and can reach identical effect equally.
Among other embodiment, power module can be accomplished by the low-voltage dc voltage power supply plan of other form.In the practical operation, control module and power module can be merged into a veneer and realize, also can be separately independently two veneers realizations.
In the present embodiment,, judge PV voltage and preset cut-in voltage or preset relation of closing voltage,, close voltage and then close accessory power supply less than presetting as if PV voltage if PV voltage is then opened accessory power supply greater than preset cut-in voltage according to the PV voltage of input.Because inverter module directly is controlled by accessory power supply; Thereby,, guarantee that inverter module can (particularly night) be able to have a rest when the low light level when accessory power supply quits work during at the low light level; Be beneficial to the useful life that prolongs inverter module, also reached the purpose of energy-saving and emission-reduction.
In conjunction with the photovoltaic DC-to-AC converter control device described in the embodiment of front; The utility model embodiment also provides a kind of control procedure of auxiliary power supply of photovoltaic inverter, comprising: according to the opening and closing of the photovoltaic voltage control accessory power supply of solar cell output.Particularly, as shown in Figure 5, the control procedure of auxiliary power supply of photovoltaic inverter comprises following determining step and opens and closes step:
Step S510: to judging by the PV voltage of solar cell input;
Step S521: judge that PV voltage whether more than or equal to preset cut-in voltage, is then to change step S522;
Step S531: judging whether PV voltage closes voltage less than preset, is then to change step S532;
Step S522: generate the accessory power supply start signal;
Step S523: open accessory power supply;
Step S532: generate the accessory power supply shutdown signal;
Step S533: close accessory power supply.
When PV voltage was judged, the method that present embodiment adopts was: PV voltage is carried out difference processing; And then with the photovoltaic voltage after the difference processing and preset cut-in voltage or presetly close voltage and compare, generate accessory power supply start signal or accessory power supply shutdown signal according to comparative result.Preset cut-in voltage is to generate according to the hysteresis comparator voltage threshold of setting with the preset voltage of closing in an embodiment; Usually preset cut-in voltage is closed voltage greater than preset, thereby can prevent when the PV voltage fluctuation, to cause accessory power supply to be closed because of being lower than preset cut-in voltage.Among the embodiment, under the situation that accessory power supply has been worked, when PV voltage less than preset cut-in voltage and greater than preset when closing voltage, the accessory power supply operate as normal; When accessory power supply is not also opened work, PV voltage is less than preset cut-in voltage and greater than preset when closing voltage, and accessory power supply is not then opened work, and this is understandable.
Correspondingly, the utility model embodiment also provides a kind of control device of photovoltaic DC-to-AC converter, comprising: solar module, inverter module, control module; Said control module is used for the opening and closing according to the said accessory power supply of photovoltaic voltage control of solar cell output, comprising: judge submodule and open and close submodule.Judge that submodule is used for the photovoltaic voltage of input is judged,,, then generate the accessory power supply shutdown signal if said photovoltaic voltage is closed voltage less than preset if said photovoltaic voltage more than or equal to preset cut-in voltage, then generates the accessory power supply start signal; Opening and closing submodule is used for opening accessory power supply or closing accessory power supply according to said accessory power supply shutdown signal according to said accessory power supply start signal.In the present embodiment, judge that submodule comprises: difference channel is used for said photovoltaic voltage is carried out difference processing; Hysteresis comparator circuit; Be used for generating preset cut-in voltage or the preset voltage of closing according to the hysteresis comparator voltage threshold of setting; When photovoltaic voltage during greater than said preset cut-in voltage; Generate the accessory power supply start signal, when photovoltaic voltage when closing voltage, generates the accessory power supply shutdown signal less than preset.Among other embodiment; Judge that the circuit that submodule comprises can not be difference channel and hysteresis comparator circuit, but the circuit of alternate manner, as long as this circuit can be reached the judgement to PV voltage; Make and work as PV voltage more than or equal to preset cut-in voltage; Then generate the accessory power supply start signal, close voltage less than preset, then generate the accessory power supply shutdown signal when PV voltage.Related each module of this photovoltaic DC-to-AC converter control device no longer repeats at this with the control device of aforementioned auxiliary power supply of photovoltaic inverter.
Control device corresponding to above-mentioned photovoltaic DC-to-AC converter; The utility model embodiment also provides a kind of control procedure of photovoltaic DC-to-AC converter; Comprise: to judging, if said photovoltaic voltage more than or equal to preset cut-in voltage, then generates the accessory power supply start signal by the photovoltaic voltage of solar cell input; If said photovoltaic voltage is closed voltage less than preset, then generate the accessory power supply shutdown signal; Open accessory power supply or close accessory power supply according to said accessory power supply start signal according to said accessory power supply shutdown signal; Startup and shutdown according to the said photovoltaic DC-to-AC converter of keying State Control of accessory power supply.This control procedure is on the basis of the control procedure of aforementioned auxiliary power supply of photovoltaic inverter, increases the startup and shutdown through the keying State Control photovoltaic DC-to-AC converter of accessory power supply, specifically can control startup and shutdown according to prior art, is not described further at this.
Electrical network and the complementary way to take power technology of inverter dc bus that each embodiment of the utility model adopts based on present auxiliary power supply of photovoltaic inverter; Because this complementary way to take power exists and has increased the problem of system loss night owing to the grid side mains-supplied; The utility model embodiment has designed a kind of when low pressure situation photovoltaic DC-to-AC converter standbies such as night; Reduce idling consumption and reach energy-saving and emission-reduction, can import PV voltage according to photovoltaic simultaneously and control control method and the device that accessory power supply opens and closes automatically.Among the embodiment,, thereby reach the purpose of controlling accessory power supply through the PWM IC (being aforesaid UC2845) of control accessory power supply; Wherein, control the working power of UC2845 automatically through the size that detects PV voltage.Through the utility model embodiment can so that photovoltaic DC-to-AC converter when the PV voltage low pressure such as be able to standby at night etc.; Loss in the standby process only is this few partial circuit that power supply is provided for IC such as transport and placing device, optocouplers; Effectively the standby at night of photovoltaic DC-to-AC converter is reduced to from 50W even higher loss and is less than the 5W loss; Significantly reduce idling consumption, reached the purpose of energy-saving and emission-reduction.
The foregoing description is giving an example of the utility model; Although disclose the most preferred embodiment and the accompanying drawing of the utility model for the purpose of illustration; But it will be appreciated by those skilled in the art that: in the spirit and scope that do not break away from the utility model and appended claim, various replacements, variation and modification all are possible.Therefore, the utility model should not be limited to most preferred embodiment and the disclosed content of accompanying drawing.
Claims (8)
1. the control device of an auxiliary power supply of photovoltaic inverter; Said accessory power supply is used for the startup and shutdown according to the keying State Control inverter module of self; It is characterized in that; Said control device comprises: control module is used for the opening and closing according to the said accessory power supply of photovoltaic voltage control of solar cell output.
2. the control device of auxiliary power supply of photovoltaic inverter as claimed in claim 1 is characterized in that, said control module comprises:
Judge submodule, be used for the photovoltaic voltage of input is judged,,, then generate the accessory power supply shutdown signal if said photovoltaic voltage is closed voltage less than preset if said photovoltaic voltage more than or equal to preset cut-in voltage, then generates the accessory power supply start signal;
Open and close submodule, be used for opening accessory power supply or closing accessory power supply according to said accessory power supply shutdown signal according to said accessory power supply start signal.
3. the control device of auxiliary power supply of photovoltaic inverter as claimed in claim 2 is characterized in that, said judgement submodule comprises:
Difference channel is used for said photovoltaic voltage is carried out difference processing;
Hysteresis comparator circuit; Be used for generating preset cut-in voltage or the preset voltage of closing,, generate the accessory power supply start signal when photovoltaic voltage during greater than preset cut-in voltage according to the hysteresis comparator voltage threshold of setting; When photovoltaic voltage when closing voltage, generates the accessory power supply shutdown signal less than preset.
4. like the control device of each described auxiliary power supply of photovoltaic inverter of claim 1 to 3, it is characterized in that, also comprise: the power module that is connected with AC power is used to said control module power supply is provided.
5. the control device of a photovoltaic DC-to-AC converter; Comprise solar module, inverter module; It is characterized in that; Also comprise: control module and accessory power supply, said control module are used for the opening and closing according to the said accessory power supply of photovoltaic voltage control of solar cell output, and said accessory power supply is used for the startup and shutdown according to the said inverter module of keying State Control of self.
6. the control device of photovoltaic DC-to-AC converter as claimed in claim 5; It is characterized in that said control module comprises judges submodule and open and close submodule that said judgement submodule is used for the photovoltaic voltage of input is judged; If said photovoltaic voltage is more than or equal to preset cut-in voltage; Then generate the accessory power supply start signal,, then generate the accessory power supply shutdown signal if said photovoltaic voltage is closed voltage less than preset; Said keying submodule is used for opening accessory power supply or closing accessory power supply according to said accessory power supply shutdown signal according to said accessory power supply start signal.
7. the control device of photovoltaic DC-to-AC converter as claimed in claim 6 is characterized in that, said judgement submodule comprises:
Difference channel is used for said photovoltaic voltage is carried out difference processing;
Hysteresis comparator circuit; Be used for generating preset cut-in voltage or the preset voltage of closing,, generate the accessory power supply start signal when photovoltaic voltage during greater than preset cut-in voltage according to the hysteresis comparator voltage threshold of setting; When photovoltaic voltage when closing voltage, generates the accessory power supply shutdown signal less than preset.
8. like the control device of each described photovoltaic DC-to-AC converter of claim 5 to 7, it is characterized in that, also comprise: the power module that is connected with AC power is used to said control module power supply is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120347790 CN202395652U (en) | 2011-09-16 | 2011-09-16 | Control device of auxiliary power source of photovoltaic inverter and control device of photovoltaic inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120347790 CN202395652U (en) | 2011-09-16 | 2011-09-16 | Control device of auxiliary power source of photovoltaic inverter and control device of photovoltaic inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202395652U true CN202395652U (en) | 2012-08-22 |
Family
ID=46670551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120347790 Expired - Lifetime CN202395652U (en) | 2011-09-16 | 2011-09-16 | Control device of auxiliary power source of photovoltaic inverter and control device of photovoltaic inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202395652U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315764A (en) * | 2011-09-16 | 2012-01-11 | 深圳创动科技有限公司 | Control method for auxiliary power supply of photovoltaic inverter and device |
| CN104124698A (en) * | 2013-04-25 | 2014-10-29 | 惠州天能源逆变技术有限公司 | Intelligent control scheme for solving morning-evening frequent starting of photovoltaic grid-connected inverter |
| US20220181884A1 (en) * | 2020-12-03 | 2022-06-09 | Delta Electronics (Shanghai) Co., Ltd. | Control method, auxiliary power supply of photovoltaic inverter and photovoltaic power generation system |
-
2011
- 2011-09-16 CN CN 201120347790 patent/CN202395652U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315764A (en) * | 2011-09-16 | 2012-01-11 | 深圳创动科技有限公司 | Control method for auxiliary power supply of photovoltaic inverter and device |
| CN104124698A (en) * | 2013-04-25 | 2014-10-29 | 惠州天能源逆变技术有限公司 | Intelligent control scheme for solving morning-evening frequent starting of photovoltaic grid-connected inverter |
| US20220181884A1 (en) * | 2020-12-03 | 2022-06-09 | Delta Electronics (Shanghai) Co., Ltd. | Control method, auxiliary power supply of photovoltaic inverter and photovoltaic power generation system |
| US11990758B2 (en) * | 2020-12-03 | 2024-05-21 | Delta Electronics (Shanghai) Co., Ltd. | Control method, auxiliary power supply of photovoltaic inverter and photovoltaic power generation system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102315764A (en) | Control method for auxiliary power supply of photovoltaic inverter and device | |
| CN202632722U (en) | LED drive circuit | |
| CN103841725B (en) | To release control module, controllable silicon light modulation LED drive circuit and system | |
| CN101807850B (en) | Circuit capable of avoiding repeatedly starting and stopping auxiliary power supply of photovoltaic inverter | |
| CN104682431B (en) | Self-starting method and self-starting system of energy storage converter | |
| CN102711321A (en) | Light emitting diode driving circuit | |
| WO2010094215A1 (en) | Power supply control device and ventilating device using same | |
| CN101860266A (en) | Photovoltaic inverter power saving control system and method | |
| CN201499095U (en) | Power supply capable of reducing power consumption under no-load state | |
| CN104242738A (en) | Frequency conversion and energy saving control device and method for cluster well pumping units | |
| CN202395652U (en) | Control device of auxiliary power source of photovoltaic inverter and control device of photovoltaic inverter | |
| CN101896027B (en) | Method and circuit for controlling multi-path current distribution of LED power supply | |
| CN204886397U (en) | Stand -by power supply automatic switch -over circuit | |
| CN201994528U (en) | Intelligent socket | |
| CN206442563U (en) | A kind of LED lamp drive circuit | |
| CN204046415U (en) | The quick startup control circuit of converter | |
| CN202906730U (en) | Self-switching-on-off starting control circuit used for LED flyback driving power supply | |
| CN102419626A (en) | Computer system, power supply and power supply management method thereof | |
| WO2017148241A1 (en) | Inverter control method, device, and power generation system | |
| CN203788514U (en) | Discharge control module, silicon controlled rectifier light dimming LED drive circuit and system | |
| CN206894325U (en) | A kind of control circuit of new low standby power loss | |
| CN101377614A (en) | Heat radiation system of projector | |
| CN109586358A (en) | A kind of power-supply management system and method | |
| CN107154730B (en) | A kind of generation of electricity by new energy two-way changing circuit and control method | |
| CN207720022U (en) | A kind of low-power consumption starts control circuit and power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120822 |