CN202872632U - Restart prevention circuit for photovoltaic grid-connected inverter - Google Patents
Restart prevention circuit for photovoltaic grid-connected inverter Download PDFInfo
- Publication number
- CN202872632U CN202872632U CN 201220603960 CN201220603960U CN202872632U CN 202872632 U CN202872632 U CN 202872632U CN 201220603960 CN201220603960 CN 201220603960 CN 201220603960 U CN201220603960 U CN 201220603960U CN 202872632 U CN202872632 U CN 202872632U
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- auxiliary source
- switching tube
- photocell
- energy consumption
- resistance
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Inverter Devices (AREA)
Abstract
The utility model relates to a restart prevention circuit for a photovoltaic grid-connected inverter. When energy of a photocell is sufficient, the system normally works, an auxiliary source outputs a stable voltage, a switching tube Q1 is driven to be conducted, the voltage of gate pole of the switching tube Q1 is configured to a zero level, and the Q1 is shut off; an energy consumption resistor R3 direct circuit is disconnected, and the system operates without additional power consumption; when the energy of the photocell is insufficient, the power of the auxiliary source is cut off, a driving signal of a switching tube Q2 is driven to disappear, and the residual electric quantity on support capacitors C2 and C3 is subjected to voltage division through resistors R1 and R2, so that the switching tube Q1 is conducted, the energy consumption resistor R3 direct circuit is connected to the circuit, the voltage of the photocell is configured to the starting voltage of the auxiliary source or below, and the auxiliary source is reliably shut off; and when illumination recovers until the power of the auxiliary source and the energy consumption resistor can be simultaneously provided, the system is restarted and restores to be normal, and the resistor R4 is used for limiting the driving current. The problem that the photovoltaic inverter is repeatedly restarted is solved, the on-off frequency of the equipment is reduced, and the service life of equipment is prolonged; and meanwhile, the usability of the equipment is improved.
Description
Technical field
The utility model relates to a kind ofly anti-restarts circuit, relates in particular to that a kind of photovoltaic combining inverter is anti-restarts circuit, belongs to the utilization of new energy resources field.
Background technology
Generally speaking, the energy source of small-power solar grid-connected inverter is solar module, because the parameters such as output voltage, power and the illumination of assembly, temperature are closely bound up, thereby every day early, always have constantly power output and the inverter startup power critical of solar components an evening, traditional scheme does not consider this, the state of repeatedly restarting appears in inverter in early party every day, cause that life of product reduces, usability is poor.
The utility model content
Technical problem to be solved: the problem the utility model of repeatedly restarting during for the sooner or later switching on and shutting down of conventional photovoltaic combining inverter provides a kind of photovoltaic combining inverter to prevent restarting circuit, to reduce the on-off times of equipment, in the extension device life-span, increase simultaneously the usability of equipment.
Technical scheme: provide a kind of photovoltaic combining inverter to prevent restarting circuit for above not enough the utility model, it is characterized in that: comprise photocell, auxiliary source, light-coupled isolation drives, driving switch pipe Q2, switching tube Q1, energy consumption resistor R3, capacitor C 1, Support Capacitor C2, C3, resistance R 1, R2, R4.
Form the Q1 drive level after resistance R 1, the R2 series connection dividing potential drop, energy consumption resistor R3 is with after switching tube Q1 connects, and is in parallel with Support Capacitor C2, C3, photocell; Capacitor C 1, driving switch pipe Q2, resistance R 2 are connected in parallel.Be provided with resistance R 4 between driving switch pipe Q2 and switching tube Q1, auxiliary source is controlled the break-make of Q2 by optical couple isolation drive circuit, thereby reaches the purpose of control Q1.
When the photocell energy was sufficient, system normally moved, auxiliary source stable output voltage, and driving switch pipe Q2 conducting, then switching tube Q1 gate pole is pulled to zero level, and Q1 turn-offs; Energy consumption resistor R3 forthright is disconnected, and system moves without additional power consumption; When the photocell energy shortage, so that auxiliary source outage, at this moment, driving switch pipe Q2 drives blackout, the upper dump energy of Support Capacitor C2, C3 passes through resistance R 1, R2 dividing potential drop so that switching tube Q1 conducting, energy consumption resistor R3 forthright access circuit, photocell voltage is pulled down to below the auxiliary source cut-in voltage, the auxiliary source reliable turn-off; When illumination restoration when auxiliary source and energy consumption resistor power can be provided simultaneously, system restart, and recover normal.Resistance R 4 is in order to limit drive current.
Beneficial effect: the of the present utility model solution problem that photovoltaic DC-to-AC converter is restarted repeatedly, the on-off times of reduction equipment, extension device life-span.Increase simultaneously the usability of equipment.
Description of drawings
Fig. 1 is the theory diagram of the utility model system.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in more detail.
As shown in Figure 1, a kind of photovoltaic combining inverter is anti-restarts circuit, comprises photocell, auxiliary source, and light-coupled isolation drives, driving switch pipe Q2, switching tube Q1, energy consumption resistor R3, capacitor C 1, Support Capacitor C2, C3, resistance R 1, R2, R4.
Form the Q1 drive level after resistance R 1, the R2 series connection dividing potential drop, energy consumption resistor R3 is with after switching tube Q1 connects, and is in parallel with Support Capacitor C2, C3, photocell; Capacitor C 1, driving switch pipe Q2, resistance R 2 are connected in parallel.Be provided with resistance R 4 between driving switch pipe Q2 and switching tube Q1, auxiliary source is controlled the break-make of Q2 by optical couple isolation drive circuit, thereby reaches the purpose of control Q1.
When the photocell energy was sufficient, system normally moved, auxiliary source stable output voltage, and driving switch pipe Q2 conducting, then switching tube Q1 gate pole is pulled to zero level, and Q1 turn-offs; Energy consumption resistor R3 forthright is disconnected, and system moves without additional power consumption; When the photocell energy shortage, so that auxiliary source outage, at this moment, driving switch pipe Q2 drives blackout, the upper dump energy of Support Capacitor C2, C3 passes through resistance R 1, R2 dividing potential drop so that switching tube Q1 conducting, energy consumption resistor R3 forthright access circuit, photocell voltage is pulled down to below the auxiliary source cut-in voltage, the auxiliary source reliable turn-off; When illumination restoration when auxiliary source and energy consumption resistor power can be provided simultaneously, system restart, and recover normal.Resistance R 4 is in order to limit drive current.
The above is preferred embodiment of the present utility model only, is not restricted to the utility model, and for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the claim scope of the present utility model.
Claims (1)
1. a photovoltaic combining inverter is prevented restarting circuit, it is characterized in that: comprise photocell, and auxiliary source, light-coupled isolation drives, driving switch pipe Q2, switching tube Q1, energy consumption resistor R3, capacitor C 1, Support Capacitor C2, C3, resistance R 1, R2, R4;
Form the Q1 drive level after resistance R 1, the R2 series connection dividing potential drop, energy consumption resistor R3 is with after switching tube Q1 connects, and is in parallel with Support Capacitor C2, C3, photocell; Capacitor C 1, driving switch pipe Q2, resistance R 2 are connected in parallel, and are provided with resistance R 4 between driving switch pipe Q2 and switching tube Q1, and auxiliary source is by the break-make of optical couple isolation drive circuit control Q2, thus control Q1;
When the photocell energy was sufficient, system normally moved, auxiliary source stable output voltage, and driving switch pipe Q2 conducting, then switching tube Q1 gate pole is pulled to zero level, and Q1 turn-offs; Energy consumption resistor R3 forthright is disconnected, and system moves without additional power consumption; When the photocell energy shortage, so that auxiliary source outage, at this moment, driving switch pipe Q2 drives blackout, the upper dump energy of Support Capacitor C2, C3 passes through resistance R 1, R2 dividing potential drop so that switching tube Q1 conducting, energy consumption resistor R3 forthright access circuit, photocell voltage is pulled down to below the auxiliary source cut-in voltage, the auxiliary source reliable turn-off; When illumination restoration when auxiliary source and energy consumption resistor power can be provided simultaneously, system restart, and recover normal, resistance R 4 is in order to limit drive current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220603960 CN202872632U (en) | 2012-11-16 | 2012-11-16 | Restart prevention circuit for photovoltaic grid-connected inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220603960 CN202872632U (en) | 2012-11-16 | 2012-11-16 | Restart prevention circuit for photovoltaic grid-connected inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202872632U true CN202872632U (en) | 2013-04-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220603960 Expired - Fee Related CN202872632U (en) | 2012-11-16 | 2012-11-16 | Restart prevention circuit for photovoltaic grid-connected inverter |
Country Status (1)
| Country | Link |
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| CN (1) | CN202872632U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103227561A (en) * | 2013-04-12 | 2013-07-31 | 深圳市汇川技术股份有限公司 | Starting device and starting method of photovoltaic inverter |
| EP3026804A4 (en) * | 2013-08-09 | 2016-11-09 | Huawei Tech Co Ltd | Starting circuit of photovoltaic inverter auxiliary power supply |
| CN108155635A (en) * | 2016-12-05 | 2018-06-12 | 日本电产伺服有限公司 | Protect circuit and motor unit |
| CN110474530A (en) * | 2019-08-05 | 2019-11-19 | 苏州浪潮智能科技有限公司 | A kind of capacitor charging control circuit |
-
2012
- 2012-11-16 CN CN 201220603960 patent/CN202872632U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103227561A (en) * | 2013-04-12 | 2013-07-31 | 深圳市汇川技术股份有限公司 | Starting device and starting method of photovoltaic inverter |
| CN103227561B (en) * | 2013-04-12 | 2016-05-25 | 深圳市汇川技术股份有限公司 | Photovoltaic DC-to-AC converter starting drive and method |
| EP3026804A4 (en) * | 2013-08-09 | 2016-11-09 | Huawei Tech Co Ltd | Starting circuit of photovoltaic inverter auxiliary power supply |
| CN108155635A (en) * | 2016-12-05 | 2018-06-12 | 日本电产伺服有限公司 | Protect circuit and motor unit |
| CN110474530A (en) * | 2019-08-05 | 2019-11-19 | 苏州浪潮智能科技有限公司 | A kind of capacitor charging control circuit |
| CN110474530B (en) * | 2019-08-05 | 2021-10-01 | 苏州浪潮智能科技有限公司 | Capacitor charging control circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130410 Termination date: 20151116 |
|
| EXPY | Termination of patent right or utility model |