CN101645672A - Solar panel power supply system and start control method thereof - Google Patents
Solar panel power supply system and start control method thereof Download PDFInfo
- Publication number
- CN101645672A CN101645672A CN200910189757A CN200910189757A CN101645672A CN 101645672 A CN101645672 A CN 101645672A CN 200910189757 A CN200910189757 A CN 200910189757A CN 200910189757 A CN200910189757 A CN 200910189757A CN 101645672 A CN101645672 A CN 101645672A
- Authority
- CN
- China
- Prior art keywords
- solar panel
- unit
- voltage
- inverter circuit
- controller
- 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.)
- Granted
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
Landscapes
- Inverter Devices (AREA)
Abstract
The invention provides a start control method for a solar panel high-open circuit voltage power supply system, belonging to the technical field of solar cells. The system comprises a solar panel, a voltage regulating control unit, a voltage regulating unit, an inverter circuit unit and a filter capacitor, wherein the voltage regulating unit, the inverter circuit unit and the filter capacitor are connected at both ends of the solar panel in parallel; and the voltage regulating control unit is connected with the voltage regulating unit to control the on or off of the voltage regulating unit. Inthe invention, the voltage regulating unit is connected at both ends of the backward stage inverter circuit in parallel; when the system is started, the purpose of controlling the output voltage of the solar panel by controlling the on/off of the voltage regulating unit is realized, so as to ensure that the backward stage inverter circuit can smoothly start work under safe voltage, simultaneouslythe input voltage range is enlarged without energy loss, thereby optimizing the model selection of a backward stage circuit power device and improving system efficiency.
Description
Technical field
The invention belongs to technical field of solar batteries, relate in particular to a kind of start-up control method of solar panel high open circuit voltage electric power system.
Background technology
Solar power generation has begun flourish as a kind of emerging energy technology in the whole world.By with solar cell series connection and in parallel, can obtain the powerful output power energy.But many times the too high open circuit voltage of solar panel has restricted the raising of the type selecting and the efficient of load circuit elements, for circuit normally starts work, sometimes level inverter circuit in back must use withstand voltage very high switching tube, and in operate as normal, the real work voltage withstand voltage initial with it of switching tube differs greatly, so, be unfavorable for the optimization of switching tube type selecting, restricted the raising of late-class circuit efficient.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of solar panel power supply system and start-up control method thereof, is intended to improve the efficient of back level inverter circuit.
The embodiment of the invention is achieved in that a kind of solar panel power supply system, comprising:
Solar panel, Regulation Control unit, pressure regulation unit, inverter circuit unit and filter capacitor; Wherein said pressure regulation unit, described inverter circuit unit and described filter capacitor are parallel to the two ends of described solar panel, and described Regulation Control unit is connected with described pressure regulation unit, controls turning on and off of described pressure regulation unit;
When the dc voltage value of described solar panel output surpassed the withstand voltage of the single switching transistor in the inverter circuit unit in preset range, the described switch element of described Regulation Control unit controls was connected; When the dc voltage value of described solar panel output was lower than the withstand voltage of the single switching transistor in the described inverter circuit unit in preset range, the described switch element of described Regulation Control unit controls turn-offed the normal inversion work in described inverter circuit unit.
The start-up control method of the solar panel power supply system that the embodiment of the invention provides may further comprise the steps:
When the dc voltage value of solar panel output surpasses the withstand voltage of the single switching transistor in the inverter circuit unit in preset range, the pressure regulation unit connection that control is parallel to the solar panel two ends increases the cell panel output current, output voltage drops to set point, and the work of inverter circuit unit starting is also turn-offed this regulating circuit;
When the dc voltage value of solar panel output was lower than the withstand voltage of the single switching transistor in the inverter circuit unit in preset range, the pressure regulation unit that control is parallel to the solar panel two ends turn-offed the normal inversion work in inverter circuit unit.
In the embodiment of the invention, in a pressure regulation unit in parallel, level inverter circuit two ends, back, when system start-up, realize controlling the purpose of solar panel output voltage by the switching of controlling this switch element, make that back level inverter circuit can startup work smoothly under safe voltage, in loss of energy not, enlarge input voltage range, can optimize late-class circuit power device type selecting, improved system effectiveness.
Description of drawings
Figure 1A and Figure 1B are respectively the equivalent model and the I-V curve synoptic diagrams of the solar cell that provides of the embodiment of the invention;
Fig. 2 is the structure principle chart of the solar panel power supply system that provides of the embodiment of the invention;
Fig. 3 is a kind of execution mode of solar panel power supply system shown in Figure 2;
Control signal flow graph when Fig. 4, Fig. 5, Fig. 6 are respectively each switch on and off in the circuit shown in Figure 3;
Fig. 7 is the sequential chart of circuit operate as normal shown in Figure 3;
Fig. 8, Fig. 9 are the pilot switch shop S2 control principle figure whether short circuit damages in circuit shown in Figure 3.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
In the embodiment of the invention, in a pressure regulation unit in parallel, level inverter circuit two ends, back, when system start-up, realize controlling the purpose of solar panel output voltage, make that back level inverter circuit can startup work smoothly under safe voltage by the switching of controlling this switch element.
From the I-V curve shown in the solar cell shown in Figure 1A (equivalent current source and diode parallel model) and Figure 1B as can be seen, along with the increase of output current I, its output voltage V can be more and more littler.The embodiment of the invention is utilized this characteristic of solar cell, and the structural principle of solar panel power supply system as shown in Figure 2 is provided, and for convenience of description, only shows part related to the present invention.
With reference to Fig. 2, the electric power system that the embodiment of the invention provides comprises the filter capacitor Bus capacity of solar panel SOLARARRAY, Regulation Control unit 1, pressure regulation unit 2, inverter circuit unit 3 and inverter circuit unit 3, wherein pressure regulation unit 2, inverter circuit unit 3 and filter capacitor Buscapacity are parallel to the two ends of solar panel SOLAR ARRAY, and Regulation Control unit 1 is connected with pressure regulation unit 2, controls turning on and off of pressure regulation unit 2.
When the output voltage values of solar panel SOLAR ARRAY is lower than the predetermined ratio of the single switching transistor withstand voltage in the inverter circuit unit 3 (as 90%), 1 control pressure regulation unit 2, Regulation Control unit turn-offs the 3 normal inversion work of inverter circuit unit.And when the initial solar cell open circuit voltage predetermined ratio withstand voltage above the single switching transistor in the inverter circuit unit 3 is above, Regulation Control unit 1 control switch unit 2 is connected, this moment, the output current of solar panel SOLAR ARRAY increased, and according to Figure 1B, its output voltage begins to descend, and the voltage on the filter capacitor Bus capacity in parallel with solar panel SOLAR ARRAY also begins 2 discharges of pressure regulation unit and descends.When filter capacitor Bus capacity drops to the certain proportion of switching tube rated voltage of inverter circuit unit 3 when (for example 80% rated voltage), start working in inverter circuit unit 3, the DC power supply detection signal that while Regulation Control unit 1 receives is in normal range (NR), control switch unit 2 is turn-offed, and starts inverter circuit unit 3 and makes it operate as normal.
Fig. 3 is a kind of execution mode of solar panel power supply system shown in Figure 2, wherein, the first controller S1 control, master controller Main control, voltage-stabiliser tube D, capacitor C 1 have been formed the Regulation Control unit 1 among Fig. 2, and resistance R 1, switching tube S1, switching tube S2 have then formed the pressure regulation unit 2 among Fig. 2.When the dc voltage value of described solar panel output surpasses the withstand voltage of the single switching transistor in the described inverter circuit unit in preset range, described master controller Main control controls described switching tube S2 and connects so that described capacitor C 1 charges to the burning voltage of described voltage-stabiliser tube D, and the described then first controller S1control gets electric and controls described switching tube S1 and connect; When the dc voltage value of described solar panel output is lower than the withstand voltage of the single switching transistor in the described inverter circuit unit in preset range, described master controller Main control controls described switching tube S2 shutoff so that described capacitor C 1 is discharged, and the described then first controller S1 control dead electricity is also controlled described switching tube S1 and turn-offed.
Further, consider the phenomenon that switching tube S2 might be short-circuited, one difference channel amplifier also is set in Regulation Control unit 1, two input connects the two ends of capacitor C 1 respectively, its output connects master controller Main control, and master controller Main control judges by the output of monitoring difference channel amplifier whether switching tube S2 damages.
Further, for avoiding taking place when switching tube S1, the S2 short circuit simultaneously the situation that inverter can't operate as normal, 2 are provided with a disconnected slowly type protective tube that is connected between resistance R 1 and the switching tube S1 in switch element.
Solar panel power supply system shown in Figure 3 has three kinds of mode of operations, and details are as follows:
One, normal mode of operation
When input solar panel SOLAR ARRAY voltage be lower than back grade full-bridge circuit single switching transistor withstand voltage 90% the time, do not work in Regulation Control unit 1, S1, S2 are all controlled not open-minded.The normal inversion work of full bridge inverter, when direct voltage surpass the full-bridge circuit single switching transistor withstand voltage 90% when above, start working in this Regulation Control unit 1.At first open-minded by Main control control S2, as shown in Figure 4.
Because the S2 conducting, C1 electric capacity charges to the burning voltage of voltage-stabiliser tube D, and when the C1 both end voltage satisfied S1 control circuit normal running conditions, this circuit working was also controlled the S1 conducting.This moment, the internal timing circuit of S1 control was also started working, as shown in Figure 5.
After S1 and the S2 conducting, the output current of solar panel increases, and its output voltage begins to descend (principle is referring to the IV curve shown in Figure 1B), and the voltage on the Bing Lian BUS electric capacity also begins discharge decline with it.(for example 80% rated voltage) back level inverter circuit is started working when detecting BUS voltage drops to the certain proportion of back level inverter circuit switching tube rated voltage, and its original upload power target goes up poor (correlation computations can obtain by voltage and self setup parameter of detecting) of consumed power and BUS capacitor discharge power for resistor rod R1.By the consumption (accompanying drawing 1) of late-class circuit power, guarantee the output voltage stabilization of solar panel.After the late-class circuit operate as normal, turn-off this Regulation Control unit switch pipe S2.Because S2 turn-offs, capacitor C 1 is by resistance R 2, and R3 discharges, and S1 control circuit quits work, and S1 turn-offs afterwards.As shown in Figure 6.
The sequential of whole operate as normal is for as shown in Figure 7.
Two, the mode of operation of S2 short circuit damage:
After connecting solar panel, suppose that main switch S2 short circuit damages, then S1 control power supply capacitor C 1 keeps constant voltage, and initial S1 is controlled open-minded; After after a while (given by delay circuit), the S1control circuit sends low level signal, turn-offs S1.Because S2 is in short circuit, causes the C1 both end voltage constant, this moment, the difference channel of amplifier continued the output high level to Main control, and Main control judges that by monitoring this high level lasting time S2 damages.As shown in Figure 8.
Three, the mode of operation of S1, S2 short circuit damage:
After connecting solar panel, suppose all short circuit damages of switching tube S2 and switching tube S1, then fuse fused in outrange work a period of time.Simultaneously because the S2 short circuit, so this moment, power supply capacitor C 1 both end voltage of S1 control still kept constant, this moment, differential amplifier continued to send high level to Main control, and Main control judges that by monitoring this high level lasting time S2 damages, and provides the warning signal.As shown in Figure 9.
In the embodiment of the invention, in a pressure regulation unit in parallel, level inverter circuit two ends, back, when system start-up, realize controlling the purpose of solar panel output voltage by the switching of controlling this switch element, make that back level inverter circuit can startup work smoothly under safe voltage, in loss of energy not, enlarge input voltage range, can optimize late-class circuit power device type selecting, improved system effectiveness.Also possess multiple mode of operation simultaneously, can judge whether short circuit damages switching tube by adopting difference channel.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1, a kind of solar panel power supply system is characterized in that, comprising:
Solar panel, Regulation Control unit, pressure regulation unit, inverter circuit unit and filter capacitor; Wherein said pressure regulation unit, described inverter circuit unit and described filter capacitor are parallel to the two ends of described solar panel, and described Regulation Control unit is connected with described pressure regulation unit, controls turning on and off of described pressure regulation unit;
When the dc voltage value of described solar panel output surpassed the withstand voltage of the single switching transistor in the inverter circuit unit in preset range, the described pressure regulation of described Regulation Control unit controls unit was connected; When the dc voltage value of described solar panel output was lower than the withstand voltage of the single switching transistor in the described inverter circuit unit in preset range, the described pressure regulation of described Regulation Control unit controls unit turn-offed, the normal inversion work in described inverter circuit unit.
2, solar panel power supply system as claimed in claim 1 is characterized in that:
Described Regulation Control unit comprises first controller, second controller, voltage-stabiliser tube D, capacitor C 1, resistance R 3; Described capacitor C 1 is the power supply filter capacitor of first controller, and capacitor C 1 is connected with the positive pole of described solar panel by resistance R 3; Described voltage-stabiliser tube D is connected in parallel on described capacitor C 1 two ends;
Described pressure regulation unit comprises successively the power resistor R1 that connects, by the switching tube S1 of described first controller control, with switching tube S1 parallel resistor R2 and by the switching tube S2 of described second controller control;
When the dc voltage value of described solar panel output surpasses the withstand voltage of the single switching transistor in the described inverter circuit unit in preset range, described second controller is controlled described switching tube S2 and is connected so that described capacitor C 1 charges to the burning voltage of described voltage-stabiliser tube D, described then first controller gets electric and controls described switching tube S1 and connect, and electric current increases on the feasible resistance R 1 of flowing through; When the dc voltage value of described solar panel output is lower than the withstand voltage of the single switching transistor in the described inverter circuit unit in preset range, described second controller is controlled described switching tube S2 shutoff so that described capacitor C 1 is discharged by resistance R 2, R3, and the described then first controller dead electricity is also controlled described switching tube S1 and turn-offed.
3, solar panel power supply system as claimed in claim 2, it is characterized in that, described Regulation Control unit also comprises a difference channel, two input connects the two ends of described capacitor C 1 respectively, its output connects described second controller, and described second controller judges by the output of monitoring described difference channel whether described switching tube S2 damages.
As claim 2 or 3 described solar panel power supply systems, it is characterized in that 4, described pressure regulation unit comprises that also one is connected the disconnected slowly type protective tube between described power resistor R1 and the described switching tube S1.
5, a kind of start-up control method of solar panel power supply system is characterized in that, may further comprise the steps:
When the dc voltage value of solar panel output surpasses the withstand voltage of the single switching transistor in the inverter circuit unit in preset range, control is parallel to the pressure regulation unit at solar panel two ends and connects, the cell panel output current is increased, output voltage drops to set point, starts working and turn-off this regulating circuit in the inverter circuit unit;
When the dc voltage value of solar panel output was lower than the withstand voltage of the single switching transistor in the inverter circuit unit in preset range, the pressure regulation unit that control is parallel to the solar panel two ends turn-offed the normal inversion work in inverter circuit unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101897579A CN101645672B (en) | 2009-08-26 | 2009-08-26 | Solar panel power supply system and start control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101897579A CN101645672B (en) | 2009-08-26 | 2009-08-26 | Solar panel power supply system and start control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101645672A true CN101645672A (en) | 2010-02-10 |
| CN101645672B CN101645672B (en) | 2011-07-27 |
Family
ID=41657412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101897579A Active CN101645672B (en) | 2009-08-26 | 2009-08-26 | Solar panel power supply system and start control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101645672B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102959728A (en) * | 2010-08-20 | 2013-03-06 | 株式会社东芝 | Open-circuit voltage control system |
| CN109256851A (en) * | 2018-10-17 | 2019-01-22 | 深圳科士达新能源有限公司 | Solar inverter fan power supply supplies power with double circuit circuit |
| CN110086421A (en) * | 2019-05-06 | 2019-08-02 | 阳光电源股份有限公司 | A kind of intelligent photovoltaic component and photovoltaic generating system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102291052B (en) * | 2011-08-22 | 2014-01-22 | 浙江昱能光伏科技集成有限公司 | Solar photovoltaic system as well as energy collecting and optimizing method and fault detecting method thereof |
-
2009
- 2009-08-26 CN CN2009101897579A patent/CN101645672B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102959728A (en) * | 2010-08-20 | 2013-03-06 | 株式会社东芝 | Open-circuit voltage control system |
| CN102959728B (en) * | 2010-08-20 | 2016-01-06 | 株式会社东芝 | open-circuit voltage control system |
| CN109256851A (en) * | 2018-10-17 | 2019-01-22 | 深圳科士达新能源有限公司 | Solar inverter fan power supply supplies power with double circuit circuit |
| CN110086421A (en) * | 2019-05-06 | 2019-08-02 | 阳光电源股份有限公司 | A kind of intelligent photovoltaic component and photovoltaic generating system |
| CN110086421B (en) * | 2019-05-06 | 2021-01-08 | 阳光电源股份有限公司 | Intelligent photovoltaic module and photovoltaic power generation system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101645672B (en) | 2011-07-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103441566B (en) | The collaborative electric power system of a kind of civil power, photovoltaic cell and energy-storage battery and method | |
| CN102369496B (en) | Stabilized DC power source device | |
| CN201682417U (en) | Power supply protection circuit based on super capacitor | |
| CN202364112U (en) | Starting circuit of control chip of switching-mode power supply | |
| CN101651426B (en) | Self-starting control power converter of output terminal | |
| CN202957763U (en) | Discharge circuit for inverter | |
| CN101895148B (en) | Dual-power stable-switching device and method | |
| CN101645672B (en) | Solar panel power supply system and start control method thereof | |
| CN103457232A (en) | Short-circuit protection circuit of direct-current load and illuminator | |
| CN204497336U (en) | Multikilowatt fuel cell lithium ion battery hybrid power device | |
| CN203788025U (en) | Storage battery charging and discharging management circuit | |
| CN201142664Y (en) | Generator voltage regulator for multifunctional vehicle | |
| CN102694471B (en) | Auxiliary power supply system for photovoltaic inverter | |
| CN105280990A (en) | Kilowatt-scale fuel cell/lithium-ion cell hybrid power device and energy management method thereof | |
| CN107959279B (en) | A kind of solar battery array soft-start control system and its control method | |
| CN103312166A (en) | Power management circuit and electronic device | |
| JP2007288932A (en) | Charge control device of photovoltaic power generation facility | |
| CN101431249B (en) | Energy-saving apparatus for charger of boosted vehicle | |
| JP6168854B2 (en) | Grid interconnection device | |
| CN102957132B (en) | Uninterrupted power supply (UPS) battery low voltage discharge protection circuit with return difference | |
| CN102035182A (en) | Universal type short circuit isolation protection circuit for flyback switching power supply | |
| CN201298743Y (en) | Energy-saving device for moped charger | |
| CN209182690U (en) | A kind of anti-shading circuit of photovoltaic panel for transmission line of electricity monitoring | |
| CN204462339U (en) | A kind of electric quantity detecting circuit and solar water heater control panel | |
| CN1327589C (en) | Electric supply recovery self-starting device of UPS system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230119 Address after: Floor 9, Keshida Industrial Park R&D Building, No.7 Road, Gaoxinyuan West District, Guangming New District, Shenzhen, Guangdong 518000 Patentee after: SHENZHEN KSTAR NEW ENERGY Co.,Ltd. Address before: 518057, 401, 402 and 1, two software park, hi tech North Zone, Nanshan District, Guangdong, Shenzhen Patentee before: SHENZHEN KSTAR SCIENCE AND TECHNOLOGY Co.,Ltd. |