CN105826947A - Solar grid-connected power generation system - Google Patents
Solar grid-connected power generation system Download PDFInfo
- Publication number
- CN105826947A CN105826947A CN201610304526.8A CN201610304526A CN105826947A CN 105826947 A CN105826947 A CN 105826947A CN 201610304526 A CN201610304526 A CN 201610304526A CN 105826947 A CN105826947 A CN 105826947A
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- CN
- China
- Prior art keywords
- solar
- stm32f051
- circuit
- control circuit
- core control
- 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.)
- Pending
Links
- 238000010248 power generation Methods 0.000 title abstract description 8
- 230000005611 electricity Effects 0.000 claims description 25
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 238000005286 illumination Methods 0.000 abstract 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
Classifications
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- H02J3/385—
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0216—Coatings
- H01L31/02161—Coatings for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/02167—Coatings for devices characterised by at least one potential jump barrier or surface barrier for solar cells
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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
Abstract
The invention discloses a solar street lamp, and belongs to the technical field of photovoltaic power generation. The solar street lamp includes a lamp stand, a light fixture, a controller, a solar power generation device and a storage battery, wherein the light fixture is fixed on the lamp stand; the solar power generation device is rotatably fixed on the lamp stand through a turning axle; the top end of the lamp stand is provided with a plurality of light intensity meters A; a light intensity meter B is vertically arranged on the surface of the solar power generation device; and both the light intensity meters A and the light intensity meter B are connected with the controller. For the solar street lamp, as the structure is novel and the plurality of light intensity meters are uniformly arranged above the solar lamp stand in a dispersed way, the solar street lamp can detect the solar illumination intensity from every direction in real time and transmit the signal to the controller and the controller controls the solar power generation device to rotate to face toward the direction having the highest solar illumination intensity so that the solar energy can be maximumly and completely utilized.
Description
Technical field
The present invention relates to technical field of photovoltaic power generation, specifically, particularly relate to solar grid-connected electricity generation system.
Background technology
Solar energy is a kind of natural regenerative resource, and environmentally safe and widely distributed utilization are convenient.In today that the energy and environmental problem become increasingly conspicuous, it is the most very urgent that maximum dynamics ground develops solar energy.People had carried out continuous exploration to the various utilizations of solar energy in the last few years, and wherein one of research topic utilizes solar energy to carry out photovoltaic generation exactly.Photovoltaic generating system converts light energy into the application of electric energy, and it is divided into photovoltaic stand alone generating system and grid-connected photovoltaic system.Wherein single-phase grid-connected photovoltaic power generation system power supply safety is stable and is easily controlled, it has also become many countries utilize the main selection of solar energy.
Summary of the invention
The invention discloses a kind of solar grid-connected electricity generation system, it is achieved that the MPPT maximum power point tracking of photovoltaic battery array controls, can in office when according under the conditions of obtain maximum power output.
The present invention is achieved by the following technical solutions:
nullA kind of solar grid-connected electricity generation system，Including photovoltaic battery array、Adapter、Combining inverter、Sell electricity ammeter、Buy electricity ammeter、Electrical network，Described photovoltaic battery array is connected with prime full-bridge LLC resonant transform circuit and is connected to ARM series STM32F051 core control circuit，Described photovoltaic battery array is connected with described ARM series STM32F051 core control circuit，Described ARM series STM32F051 core control circuit controls to be connected with described prime full-bridge LLC resonant transform circuit by MPPT，Described LLC resonant transform circuit is connected with rear class full bridge inverter，Described rear class full bridge inverter is connected to described ARM series STM32F051 core control circuit through LC filter circuit，It is connected between described STM32F051 core control circuit with described rear class full bridge inverter and has SPWM drive circuit，Described LC filter circuit is connected with described electrical network and is connected to ARM series STM32F051 core control circuit，Described STM32F051 core control circuit is also associated with auxiliary power circuit.
Described photovoltaic battery array surface is provided with coating.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention uses MPPT maximum power point tracking control, by controlling solar array terminal voltage, and can be in office when according to lower acquisition peak power output, it is possible to make full use of solar electrical energy generation；Photovoltaic array surface is covered with the coating of a layered low-surface energy, neither affects the use of array, array surface can be protected again to exempt from the corrosion of rainwater, extend the service life of whole system.
Accompanying drawing explanation
Fig. 1 is the structural representation one of the solar grid-connected electricity generation system of the present invention；
Fig. 2 is the structural representation two of the solar grid-connected electricity generation system of the present invention.
In Fig. 1: 1, photovoltaic battery array；2, adapter；3, combining inverter；4, electricity ammeter is sold；5, electricity ammeter is bought；6, electrical network.
Detailed description of the invention
The present invention is further described below in conjunction with the accompanying drawings:
nullA kind of solar grid-connected electricity generation system，Including photovoltaic battery array、Adapter、Combining inverter、Sell electricity ammeter、Buy electricity ammeter、Electrical network，Described photovoltaic battery array is connected with prime full-bridge LLC resonant transform circuit and is connected to ARM series STM32F051 core control circuit，Described photovoltaic battery array is connected with described ARM series STM32F051 core control circuit，Described ARM series STM32F051 core control circuit controls to be connected with described prime full-bridge LLC resonant transform circuit by MPPT，Described LLC resonant transform circuit is connected with rear class full bridge inverter，Described rear class full bridge inverter is connected to described ARM series STM32F051 core control circuit through LC filter circuit，It is connected between described STM32F051 core control circuit with described rear class full bridge inverter and has SPWM drive circuit，Described LC filter circuit is connected with described electrical network and is connected to ARM series STM32F051 core control circuit，Described STM32F051 core control circuit is also associated with auxiliary power circuit.
Described photovoltaic battery array surface is provided with coating.
As shown in Figure of description Fig. 1, a kind of solar grid-connected electricity generation system, including photovoltaic battery array, adapter, combining inverter, sell electricity ammeter, buy electricity ammeter, electrical network, photovoltaic battery array is connected with adapter and is connected to combining inverter, inverter with sell electricity ammeter and buy electricity ammeter be connected, sell electricity ammeter and buy electricity ammeter connect all be connected with electrical network, photovoltaic battery array surface is provided with coating.
nullAs shown in Figure of description Fig. 2，Photovoltaic battery array is connected with prime full-bridge LLC resonant transform circuit and is connected to ARM series STM32F051 core control circuit，Photovoltaic battery array is connected with ARM series STM32F051 core control circuit，ARM series STM32F051 core control circuit controls to be connected with prime full-bridge LLC resonant transform circuit by MPPT，LLC resonant transform circuit is connected with rear class full bridge inverter，Rear class full bridge inverter is connected to ARM series STM32F051 core control circuit through LC filter circuit，It is connected between STM32F051 core control circuit with rear class full bridge inverter and has SPWM drive circuit，LC filter circuit is connected with electrical network and is connected to ARM series STM32F051 core control circuit，STM32F051 core control circuit is also associated with auxiliary power circuit.
Electricity generation system of the present invention can be divided into two-layer configuration, prime DC/DC boosting part uses full-bridge LLC resonant transform circuit, the low pressure of photovoltaic battery array output is increased to DC bus-bar voltage 400V through full-bridge LLC resonant transform circuit, rear class DC/AC Converting Unit uses voltage-type full bridge inverter, and DC bus-bar voltage stable for prime is reverse into the alternating current of 220V/50Hz.
On the one hand ARM series STM32F051 core control circuit controls prime DC/DC part, realize MPPT maximum power point tracking and the change of LLC resonance of photovoltaic battery array, on the other hand control rear class DC/AC part, use SP-WM to drive and control, it is achieved grid-connected current and line voltage are with frequency homophase.
Prime DC/DC boosting part uses full-bridge LLC resonant transform circuit, the no-voltage (ZVS) that can realize transformer primary side switching tube in full-load range opens zero current (ZVS) shutoff with secondary commutation diode, thus improve the conversion efficiency of backing system, also provide higher DC bus-bar voltage for the conversion of rear class DC/AC.This circuit structure is simple, and Sofe Switch characteristic is good, and power attenuation is low.
Rear class DC/AC Converting Unit uses voltage-type single-phase full bridge inverter circuit, and its control system uses the SPWM i.e. outer voltage of voltage and current double closed-loop system, the double-loop control of current inner loop.
Voltage that solar array is exported by STM32F051 microcontroller, electric current, resonance current, DC bus-bar voltage, grid-connected current, line voltage constantly detect; prime is open-minded by PWM chop control LLC resonance circuit power tube; rear class controls the open-minded of inverter circuit power tube by PWM; realize stable output at different levels, overvoltage, under-voltage, cross stream, the defencive function such as overheated, this part controls to be mainly single-chip microcomputer and combines what software programming completed.Software programming uses C language to carry out under Keil developing instrument, mainly includes initialization program, mastery routine, detection program, interrupt routine etc..
Photovoltaic battery array surface is provided with coating, and the surface of coating can be low, it is possible to avoid the extended stationary periods of rainwater, photovoltaic battery array to extend service life.
The present invention uses MPPT maximum power point tracking control, by controlling solar array terminal voltage, and can be in office when according to lower acquisition peak power output, it is possible to make full use of solar electrical energy generation；Photovoltaic array surface is covered with the coating of a layered low-surface energy, neither affects the use of array, array surface can be protected again to exempt from the corrosion of rainwater, extend the service life of whole system.
In sum, it is only presently preferred embodiments of the present invention, not being used for limiting the scope that the present invention implements, all equalizations done according to the shape described in scope of the invention as claimed, structure, feature and spirit change and modify, all should be included in scope of the presently claimed invention.
Claims (2)
- null1. a solar grid-connected electricity generation system，Including photovoltaic battery array (1)、Adapter (2)、Combining inverter (3)、Sell electricity ammeter (4)、Buy electricity ammeter (5)、Electrical network (6)，It is characterized in that: described photovoltaic battery array is connected with prime full-bridge LLC resonant transform circuit and is connected to ARM series STM32F051 core control circuit，Described photovoltaic battery array is connected with described ARM series STM32F051 core control circuit，Described ARM series STM32F051 core control circuit controls to be connected with described prime full-bridge LLC resonant transform circuit by MPPT，Described LLC resonant transform circuit is connected with rear class full bridge inverter，Described rear class full bridge inverter is connected to described ARM series STM32F051 core control circuit through LC filter circuit，It is connected between described STM32F051 core control circuit with described rear class full bridge inverter and has SPWM drive circuit，Described LC filter circuit is connected with described electrical network and is connected to ARM series STM32F051 core control circuit，Described STM32F051 core control circuit is also associated with auxiliary power circuit.
- The solar grid-connected electricity generation system of one the most according to claim 1, described photovoltaic battery array (1) surface is provided with coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610304526.8A CN105826947A (en) | 2016-05-10 | 2016-05-10 | Solar grid-connected power generation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610304526.8A CN105826947A (en) | 2016-05-10 | 2016-05-10 | Solar grid-connected power generation system |
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| CN105826947A true CN105826947A (en) | 2016-08-03 |
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| CN201610304526.8A Pending CN105826947A (en) | 2016-05-10 | 2016-05-10 | Solar grid-connected power generation system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101499666A (en) * | 2008-11-03 | 2009-08-05 | 天津理工大学 | Photovoltaic grid connection power generation system based on DC converter and working method thereof |
| WO2011102910A1 (en) * | 2010-02-22 | 2011-08-25 | Petra Solar Inc. | Method and system for controlling resonant converters used in solar inverters |
| CN103117557A (en) * | 2013-03-06 | 2013-05-22 | 东南大学 | Grid-connected current control method for combined single-phase two-stage photovoltaic generation system |
| CN204089217U (en) * | 2014-09-09 | 2015-01-07 | 华北科技学院 | A kind of photovoltaic power generation grid-connecting apparatus |
| CN104539181A (en) * | 2014-12-17 | 2015-04-22 | 张远海 | Miniature photovoltaic grid-connected inverter based on LLC resonant conversion |
| CN104660045A (en) * | 2013-11-25 | 2015-05-27 | 南京博兰得电子科技有限公司 | Electric energy conversion device with energy storage management |
-
2016
- 2016-05-10 CN CN201610304526.8A patent/CN105826947A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101499666A (en) * | 2008-11-03 | 2009-08-05 | 天津理工大学 | Photovoltaic grid connection power generation system based on DC converter and working method thereof |
| WO2011102910A1 (en) * | 2010-02-22 | 2011-08-25 | Petra Solar Inc. | Method and system for controlling resonant converters used in solar inverters |
| CN103117557A (en) * | 2013-03-06 | 2013-05-22 | 东南大学 | Grid-connected current control method for combined single-phase two-stage photovoltaic generation system |
| CN104660045A (en) * | 2013-11-25 | 2015-05-27 | 南京博兰得电子科技有限公司 | Electric energy conversion device with energy storage management |
| CN204089217U (en) * | 2014-09-09 | 2015-01-07 | 华北科技学院 | A kind of photovoltaic power generation grid-connecting apparatus |
| CN104539181A (en) * | 2014-12-17 | 2015-04-22 | 张远海 | Miniature photovoltaic grid-connected inverter based on LLC resonant conversion |
Non-Patent Citations (2)
| Title |
|---|
| 中国电工技术学会: "《电子高新技术丛书 第2分册》", 31 January 2001, 机械工业出版社 * |
| 理查德•W.阿斯普朗德: "《清洁能源投资——太阳能、风能、乙醇、燃料电池、碳信用等行业的绿色贸易指南》", 31 August 2009, 上海财经大学出版社 * |
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Application publication date: 20160803 |
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