CN201479008U - Circuit for improving utilization rate of photovoltaic array voltage - Google Patents
Circuit for improving utilization rate of photovoltaic array voltage Download PDFInfo
- Publication number
- CN201479008U CN201479008U CN2009201873160U CN200920187316U CN201479008U CN 201479008 U CN201479008 U CN 201479008U CN 2009201873160 U CN2009201873160 U CN 2009201873160U CN 200920187316 U CN200920187316 U CN 200920187316U CN 201479008 U CN201479008 U CN 201479008U
- Authority
- CN
- China
- Prior art keywords
- circuit
- photovoltaic array
- voltage
- buck circuit
- array voltage
- 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
Abstract
The utility model relates to a circuit for improving the utilization rate of photovoltaic array voltage, which comprises a BUCK circuit, wherein a power switching device is arranged in the BUCK circuit, and at least one contactor is connected with the power switching device in parallel in the BUCK circuit; and the power switching device in the BUCK circuit is of an MOSFET semiconductor device or an IGBT device. The utility model can improve the utilization efficiency of the circuit, and also reduce the power loss of the circuit.
Description
Technical field
The utility model relates to a kind of circuit that improves voltage utilization, relates in particular to be applied to the circuit structure that the photovoltaic inversion system improves the photovoltaic array voltage utilization.
Background technology
How to make full use of the energy that photovoltaic array is changed, improve the photovoltaic conversion efficiency, be the important directions of photovoltaic system research always.Photovoltaic DC-to-AC converter mostly adopts the MPPT maximum power point tracking technology to realize making full use of of solar energy.Its core is to make photovoltaic array-always work in maximum power point, so that optimization is utilized solar energy.Particularly comprise requiring under the lower situation of storage battery from net application or output voltage at some, in order to follow the trail of maximum power point, satisfy the voltage request of output loading simultaneously, generally increase a Buck buck circuit in input stage, but when the voltage of photovoltaic array input itself just hangs down, the switching tube of BUCK circuit is still in running order, has increased loss and electromagnetic interference, and working long hours of switching tube also reduced each reliability of system.
The utility model content
The utility model has been designed and developed out a kind of circuit utilization ratio that improved at the deficiency of technology, has also reduced the circuit that is used to improve the photovoltaic array voltage utilization of circuit power loss.
The utility model is achieved through the following technical solutions:
A kind of circuit that is used to improve the photovoltaic array voltage utilization comprises the BUCK circuit, is provided with device for power switching in the BUCK circuit, on the BUCK circuit, and at least one contactor in parallel with device for power switching.
A kind of circuit that is used to improve the photovoltaic array voltage utilization, described BUCK circuit power switch device are MOSFET semiconductor device or IGBT device.
The utility model increases a contactor on the basis of original BUCK circuit, can effectively improve voltage utilization like this, improves system's conversion efficiency, can also reduce the EMI radiation, improves reliability of products simultaneously.Its cardinal principle is that the level power output increases behind photovoltaic array, photovoltaic array voltage reduces gradually, buck circuit switching tube conducting duty ratio increases gradually near under 1 the situation, the bypass buck circuit, directly photovoltaic voltage is delivered to back level inverter circuit by contactor, thereby made the least in power-consuming of DC-DC circuit, the input voltage of back level inverter can be too not high simultaneously, and the voltage of prime photovoltaic array can have been widened the dynamic range of photovoltaic array than higher.Make that also circuit devcie is increased the service life, improved reliability of products, increased system's conversion efficiency.，
Description of drawings
Accompanying drawing is the utility model electrical block diagram.
Embodiment
Shown in accompanying drawing.
The utility model comprises the BUCK circuit, is provided with device for power switching in the BUCK circuit, and the BUCK circuit power switch device is MOSFET semiconductor device or IGBT device, on the BUCK circuit, and at least one contactor 1 in parallel with device for power switching.At the photovoltaic input, utilize the voltage detecting circuit in original circuit, detect the voltage of input, as when detecting input voltage and reaching the lower limit that drives inverter circuit 2 work, this moment closed contactor 1, switching tube turn-offs, with the bypass of DC-DC reduction voltage circuit, the input side direct voltage directly inserts back inverter circuit 2 for inverter circuit 2 work, and this moment, the DC-DC reduction voltage circuit was not worked; When detecting input voltage when higher, controller sends a control signal to contactor 1, disconnects contactor 1, this moment the input side direct voltage through the reduction voltage circuit of DC-DC, the inverter circuit 2 that the voltage after the reduction resupplies the back uses.
Claims (2)
1. a circuit that is used to improve the photovoltaic array voltage utilization comprises the BUCK circuit, is provided with device for power switching in the BUCK circuit, it is characterized in that on the BUCK circuit at least one contactor in parallel with device for power switching.
2. a kind of circuit that is used to improve the photovoltaic array voltage utilization according to claim 1 is characterized in that described BUCK circuit power switch device is MOSFET semiconductor device or IGBT device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201873160U CN201479008U (en) | 2009-09-01 | 2009-09-01 | Circuit for improving utilization rate of photovoltaic array voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201873160U CN201479008U (en) | 2009-09-01 | 2009-09-01 | Circuit for improving utilization rate of photovoltaic array voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201479008U true CN201479008U (en) | 2010-05-19 |
Family
ID=42415262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201873160U Expired - Lifetime CN201479008U (en) | 2009-09-01 | 2009-09-01 | Circuit for improving utilization rate of photovoltaic array voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201479008U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102403884A (en) * | 2011-11-24 | 2012-04-04 | 阳光电源股份有限公司 | Modulation method and device for double-Buck circuit |
| WO2016008382A1 (en) * | 2014-07-15 | 2016-01-21 | 阳光电源股份有限公司 | Single-stage photovoltaic grid-connected inverter and control method and application thereof |
| CN113630088A (en) * | 2020-05-08 | 2021-11-09 | 台达电子工业股份有限公司 | Solar power generation system and detection method |
-
2009
- 2009-09-01 CN CN2009201873160U patent/CN201479008U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102403884A (en) * | 2011-11-24 | 2012-04-04 | 阳光电源股份有限公司 | Modulation method and device for double-Buck circuit |
| WO2016008382A1 (en) * | 2014-07-15 | 2016-01-21 | 阳光电源股份有限公司 | Single-stage photovoltaic grid-connected inverter and control method and application thereof |
| CN113630088A (en) * | 2020-05-08 | 2021-11-09 | 台达电子工业股份有限公司 | Solar power generation system and detection method |
| US11632076B2 (en) | 2020-05-08 | 2023-04-18 | Delta Electronics, Inc. | Solar power generation system and test method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101902051B (en) | Efficient energy conversion device for solar cell panel, array and application method | |
| CN101710716A (en) | Grid-connected inverter capable of reducing electrolytic capacitance | |
| CN201717802U (en) | Reverse connection protection inverter circuit | |
| CN101860270A (en) | Access system for adequately utilizing wind energy and solar energy and realization method thereof | |
| CN101604923A (en) | The pulse width modulation (PWM) control method that is used for single-phase grid-connected inverter | |
| CN203289128U (en) | Photovoltaic charging controller | |
| CN101710805A (en) | Independent photovoltaic power generation system and working method for tracking maximum power thereof | |
| CN104242790A (en) | Wind-solar hybrid power generation system | |
| CN103312136B (en) | Method and device for restraining power-frequency ripple current | |
| CN201928205U (en) | Photovoltaic inversion system with maximum power tracking capability | |
| CN103812140A (en) | Wind energy, solar energy and commercial power complementary electric vehicle charging system | |
| CN201750160U (en) | Solar energy power supply grid-connected integrated device | |
| CN203608087U (en) | MPPT controller of double-Boost circuit | |
| CN201479008U (en) | Circuit for improving utilization rate of photovoltaic array voltage | |
| CN104821610A (en) | Three-level high-reliability renewable energy control method and device based on double super-capacitor module groups | |
| CN201352761Y (en) | Voltage booster circuit topological structure | |
| CN202121531U (en) | Solar energy photovoltaic power supply system | |
| CN202405798U (en) | Energy storage controller for wind and solar hybrid power generation | |
| CN201656848U (en) | Access system for fully utilizing wind energy and solar energy | |
| CN204498015U (en) | Based on the photovoltaic control system of MPPT | |
| CN201383693Y (en) | Solar charge/discharge controller | |
| CN203734367U (en) | Communication base station solar power generation DC grid-connected power supply system | |
| CN203352430U (en) | Device for suppressing power frequency ripple current | |
| CN202978320U (en) | Wind energy, solar energy and commercial power complementary electric vehicle charging station | |
| CN202949245U (en) | Wind and light hybrid power generation system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: HEFEI SUNGROW POWER SUPPLY CO., LTD. Free format text: FORMER NAME: HEFEI SUNLIGHT POWER SUPPLY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: High tech Zone of Hefei city of Anhui Province in 230088 Lake Road No. 2 Patentee after: SUNGROW POWER SUPPLY Co.,Ltd. Address before: High tech Zone of Hefei city of Anhui Province in 230088 Lake Road No. 2 Patentee before: Hefei sunshine power Limited by Share Ltd. Address after: High tech Zone of Hefei city of Anhui Province in 230088 Lake Road No. 2 Patentee after: Hefei sunshine power Limited by Share Ltd. Address before: High tech Zone of Hefei city of Anhui Province in 230088 Lake Road No. 2 Patentee before: Hefei Sungrow Power Supply Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20100519 |
|
| CX01 | Expiry of patent term |