CN102916447A - Photovoltaic grid-connected power generation and supply device - Google Patents
Photovoltaic grid-connected power generation and supply device Download PDFInfo
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- CN102916447A CN102916447A CN2012104609503A CN201210460950A CN102916447A CN 102916447 A CN102916447 A CN 102916447A CN 2012104609503 A CN2012104609503 A CN 2012104609503A CN 201210460950 A CN201210460950 A CN 201210460950A CN 102916447 A CN102916447 A CN 102916447A
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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
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- 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 photovoltaic grid-connected power generation and supply device. The photovoltaic grid-connected power generation and supply device is characterized in that an Infineon XE164CM single chip microcomputer is used as a core chip which is used for controlling a PWW (Pulse-Width Modulation) duty ratio of a maximum power point tracking (MPPT) method of a DC/DC transformation unit, detecting a zero crossing point of a synchronizing signal of a grid voltage and controlling solar energy to be converted into a sine-wave current being identical with a power grid in frequency and phase position and fed into the power grid, and controlling the SPWM (Sinusoidal Pulse Width Modulation) charging of a charger. Two different control strategies are adopted for a photovoltaic grid-connected power generation function and a power supply function of the photovoltaic grid-connected power generation and supply device, and the maximum sharing effect is achieved through the structure planning of hardware of the device, which makes great sense for reducing the cost.
Description
Technical field
The present invention relates to a kind of parallel network power generation and electric supply installation.
Background technology
The energy is the power resources of human economy and cultural activity.Owing to using in a large number fossil energy, the whole world produces a large amount of greenhouse gases every day, has caused very serious air pollution at present.If do not add control, 1/4th of human living space will be subject to great threat thus.For above situation, development and use regenerative resource and various green energy resource are human necessary Adopts measures with the energy resource structure that realizes sustainable development.Consider from the factors of energy supply, solar energy meets the desirable green energy resource of sustainable development beyond doubt.
Grid-connected photovoltaic system and photovoltaic power supply system are the important applied field in the photovoltaic system technology.If PV Grid Connected Generation and photovoltaic power supply function are effectively combined, can further widen its application scenario.The inverter topological structure has power frequency isolated form, high-frequency isolation type, single-stage type, two-stage non-isolation type topological structure in existing grid-connected photovoltaic system and the photovoltaic power supply system, but shortcoming is separately arranged.Power frequency isolated form system is comprised of photovoltaic array, full-bridge circuit, filter circuit and power frequency isolating transformer, and its shortcoming is that low frequency isolating transformer volume is larger, and quality is heavy, causes the volume and weight of whole system all to increase to some extent simultaneously cost rising; The high-frequency isolation type system by photovoltaic array, contain high-frequency isolation transformer DC/DC converter, full-bridge circuit and filter circuit and form, its shortcoming is exactly owing to there not being the isolation link of rear class, so may contain DC component at networking electric current link place electrical network is polluted; Single-stage type system is comprised of photovoltaic array, full-bridge circuit and filter circuit, and its shortcoming also is not have electrical isolation, has certain potential safety hazard; The two poles of the earth non-isolation type system compares with the monopole type system on forming increases the DC/DC converter unit, and shortcoming is identical with single-stage type system.The inverter topological structure of native system by photovoltaic array, contain high-frequency isolation transformer DC/DC converter, full-bridge circuit, filter circuit and high-frequency isolation transformer etc. and form, overcome the shortcoming of above-mentioned each topological structure, have that volume is little, lightweight, electrical isolation, the characteristics few to electric network pollution.In addition, the application of ferric phosphate lithium cell in this system makes compares with the system that uses traditional lead acid accumulator that to have a volume little, discharges and recharges long advantage of life-span.
Summary of the invention the purpose of this invention is to provide the device that a kind of simple in structure, low-cost, parallel network power generation and photovoltaic power supply function combine.Technical scheme of the present invention is: a kind of parallel network power generation and electric supply installation, device power output 500W, 16 single-chip microcomputers by three photovoltaic battery panel RE180S, DC boosting type DC/DC converter unit, H bridge inversion unit, isolating transformer unit, T-shaped filter unit, charger, ferric phosphate lithium cell group, high frequency filter and the production of company of Infineon, its model XE164CM is that the control unit of core forms, three photovoltaic battery panels (1) model is identical, and the power of every photovoltaic battery panel is 180W; The variable DC voltage signal of three photovoltaic battery panels (1) output is exported to DC boosting type DC/DC converter unit (2), input, DC boosting type DC/DC converter unit (2), with the DC voltage pumping-up of output after three photovoltaic battery panels (1) series connection to about the 400V, the 220V alternating voltage that is incorporated into the power networks after the inversion is provided, its implementation procedure: drive circuit chip MIC4425BM in the output pin output switching signal control DC boosting type DC/DC converter unit of maximum power tracing control strategy (MPPT) control XE164CM single-chip microcomputer in the control program, thereby the break-make of power ratio control field effect transistor switch mosfet pipe IPW60R045CP, the pump liter of realization direct voltage; The output of DC boosting type DC/DC converter unit (2) inputs to H bridge inversion unit (3) input with the 400V d. c. voltage signal of output, H bridge inversion unit (3) is reverse into single-phase grid-connected voltage alternating current 220V with the 400V direct voltage of DC boosting type DC/DC converter unit (2) output, its implementation procedure: several output pin output switching signal control H bridge inversion units of Sine Wave Pulse Width Modulation control strategy (SPWM) control XE164CM single-chip microcomputer drive chip 6ED003L06-F in the control program, and then the break-make of control insulated gate bipolar transistor IGBT switching tube Ikw30n60t, realize that direct voltage is to the inversion of alternating voltage; H bridge inversion unit (3) output inputs to T-shaped filter (4) input with single-phase grid-connected voltage alternating current 220V, and T-shaped filter (4) carries out shaping filter to the AC signal of H bridge inversion unit (3) output; T-shaped filter (4) output inputs to isolating transformer (5) input with alternating voltage 220V, and the introducing of isolating transformer (5) makes the electric fully insulation of primary side and secondary side; Isolating transformer (5) output inputs to single-phase electrical network (6) one ends with alternating voltage 220V through isolating switch.
The present invention is when having sunshine or electrical network, the output of isolating transformer (5) sends the energy of photovoltaic cell to the input of charger (7) or the input that single-phase electrical network (6) one ends pass to power grid energy charger (7), the input that the output of charger (7) sends energy or the power grid energy of photovoltaic cell to ferric phosphate lithium cell group (8), ferric phosphate lithium cell group (8) is comprised of the HKE-IFP-480-10 ferric phosphate lithium cell group of three groups of identical models, and energy storage is in ferric phosphate lithium cell group (8); Charger (7) discharge and recharge control, the electric weight detection signal is to be sent by the system controller (9) take the single-chip microcomputer XE164F of Infineon as core, system controller (9) is the core of this device.And when all the time according to and without electrical network and when needing illumination, can take out by the energy of discharger with battery, the function of making electric ballast via H bridge inversion unit (3) is again gone gas discharge lamp (11) through high frequency filter (10).Hardware by this structural planning reaches the highest shared effect, and is simple in structure, gets final product and only need to change a little on control program, and this also has very large meaning to reducing cost.
Ferric phosphate lithium cell of the present invention is compared with traditional lead acid accumulator, has advantages of self.Energy density is about 4 times of lead-acid battery, and volume is little, lightweight; Lithium iron phosphate positive material has good chemical property, and charge and discharge platform is very steady, Stability Analysis of Structures in the charge and discharge process, and battery does not burn, does not explode, fail safe is good; Battery normal operation during 55 ℃ of external temperatures; Charge and discharge is 15 times that standard is discharged; Monomer through 2000 times the circulation after capacity still greater than 80%; Whole production process cleaning is nontoxic, and all raw materials are all nontoxic.Thereby this device has that energy density is high, volume is little, the characteristics of lightweight, long service life, safety, environmental protection.The present invention has further promoted the development of PV Grid Connected Generation and photovoltaic independently-powered function combined device, with the acp chip of Infineon's single-chip microcomputer as controller, widened the acp chip of photovoltaic controller, and the ferric phosphate lithium cell group included in the device, improve the life-span that device discharges and recharges, alleviated the weight of device and saved the space.
Description of drawings
Fig. 1 is parallel network power generation of the present invention and electric supply installation structural representation
Fig. 2 is principle of the invention structure chart
Embodiment
As shown in Figure 1, the present invention is a kind of parallel network power generation and electric supply installation, device power output 500W, 16 single-chip microcomputers by three photovoltaic battery panel RE180S, DC boosting type DC/DC converter unit, H bridge inversion unit, isolating transformer unit, T-shaped filter unit, charger, ferric phosphate lithium cell group, high frequency filter and the production of company of Infineon, its model XE164CM is that the control unit of core forms, three photovoltaic battery panel 1 models are identical, and the power of every photovoltaic battery panel is 180W; The variable DC voltage signal of three photovoltaic battery panel 1 outputs is exported to DC boosting type DC/DC converter unit 2, input, DC boosting type DC/DC converter unit 2, to about the 400V, provide the 220V alternating voltage that is incorporated into the power networks after the inversion with the DC voltage pumping-up of output after three photovoltaic battery panels 1 series connection.As shown in Figure 2, its implementation procedure: drive circuit chip MIC4425BM in the output pin output switching signal control DC boosting type DC/DC converter unit of maximum power tracing control strategy (MPPT) control XE164CM single-chip microcomputer in the control program, thereby the break-make of power ratio control field effect transistor switch mosfet pipe IPW60R045CP, the pump liter of realization direct voltage; The output of DC boosting type DC/DC converter unit 2 inputs to H bridge inversion unit 3 inputs with the 400V d. c. voltage signal of output, H bridge inversion unit 3 is reverse into single-phase grid-connected voltage alternating current 220V with the 400V direct voltage of DC boosting type DC/DC converter unit 2 outputs, its implementation procedure: several output pin output switching signal control H bridge inversion units of Sine Wave Pulse Width Modulation control strategy (SPWM) control XE164CM single-chip microcomputer drive chip 6ED003L06-F in the control program, and then the break-make of control insulated gate bipolar transistor IGBT switching tube Ikw30n60t, realize that direct voltage is to the inversion of alternating voltage; H bridge inversion unit 3 outputs input to T-shaped filter 4 inputs with single-phase grid-connected voltage alternating current 220V, and the AC signal of 4 pairs of H bridges of T-shaped filter inversion unit, 3 outputs is carried out shaping filter; T-shaped filter 4 outputs input to isolating transformer 5 inputs with alternating voltage 220V, and the introducing of isolating transformer (5) makes the electric fully insulation of primary side and secondary side; Isolating transformer 5 outputs input to single-phase electrical network 6 one ends with alternating voltage 220V through isolating switch.
As shown in Figure 1, when sunshine or electrical network are arranged, the output of isolating transformer 5 sends the energy of photovoltaic cell to the input of charger 7 or the input that single-phase electrical network 6 one ends pass to power grid energy charger 7, the input that the output of charger 7 sends energy or the power grid energy of photovoltaic cell to ferric phosphate lithium cell group 8, ferric phosphate lithium cell group 8 is comprised of the HKE-IFP-480-10 ferric phosphate lithium cell group of three groups of identical models, and energy storage is in ferric phosphate lithium cell group 8; Charger 7 discharge and recharge control, the electric weight detection signal is to be sent by the system controller 9 take the single-chip microcomputer XE164F of Infineon as core, system controller 9 is cores of this device, and the control of the PWM duty ratio of maximum power point tracking (MPPT) method of DC boosting type DC/DC converter unit 2, detection, the solar energy of line voltage synchronizing signal zero crossing convert all controls such as the control of the synchronous sine-wave current feed-in of electrical network same frequency electrical network to and all realized by system controller 9; And when all the time according to and without electrical network and when needing illumination, can take out by the energy of discharger with battery, the function of making electric ballast via H bridge inversion unit 3 is again gone gas discharge lamp 11 through high frequency filter 10.Hardware by this structural planning reaches the highest shared effect, and is simple in structure, gets final product and only need to change a little on control program, and this also has very large meaning to reducing cost.
Photovoltaic battery panel model: RE180S, the drive circuit chip model of DC boosting type DC/DC converter unit: MIC4425BM, power field effect transistor switch mosfet pipe model: IPW60R045CP, H bridge inversion unit drives chip model: 6ED003L06-F, insulated gate bipolar transistor IGBT switching tube model: IKW30N60T, ferric phosphate lithium cell group model: HKE-IFP-480-10, system controller acp chip Infineon single-chip microcomputer model: XE164CM.
The present invention has realized PV Grid Connected Generation and the effective combination of photovoltaic power supply function, and the hardware of this kind structural planning reaches the highest shared effect, get final product and only need to change a little on control program, this has very large meaning to the reduction cost, and further broaden application occasion.
Claims (2)
1. a parallel network power generation and electric supply installation, it is characterized in that: device power output 500W, 16 single-chip microcomputers by three photovoltaic battery panel RE180S, DC boosting type DC/DC converter unit, H bridge inversion unit, isolating transformer unit, T-shaped filter unit, charger, ferric phosphate lithium cell group, high frequency filter and the production of company of Infineon, its model XE164CM is that the control unit of core forms, three photovoltaic battery panels (1) model is identical, and the power of every photovoltaic battery panel is 180W; The variable DC voltage signal of three photovoltaic battery panels (1) output is exported to DC boosting type DC/DC converter unit (2), input, DC boosting type DC/DC converter unit (2), with the DC voltage pumping-up of output after three photovoltaic battery panels (1) series connection to about the 400V, the 220V alternating voltage that is incorporated into the power networks after the inversion is provided, its implementation procedure: drive circuit chip MIC4425BM in the output pin output switching signal control DC boosting type DC/DC converter unit of maximum power tracing control strategy (MPPT) control XE164CM single-chip microcomputer in the control program, thereby the break-make of power ratio control field effect transistor switch mosfet pipe IPW60R045CP, the pump liter of realization direct voltage; The output of DC boosting type DC/DC converter unit (2) inputs to H bridge inversion unit (3) input with the 400V d. c. voltage signal of output, H bridge inversion unit (3) is reverse into single-phase grid-connected voltage alternating current 220V with the 400V direct voltage of DC boosting type DC/DC converter unit (2) output, its implementation procedure: several output pin output switching signal control H bridge inversion units of Sine Wave Pulse Width Modulation control strategy (SPWM) control XE164CM single-chip microcomputer drive chip 6ED003L06-F in the control program, and then the break-make of control insulated gate bipolar transistor IGBT switching tube Ikw30n60t, realize that direct voltage is to the inversion of alternating voltage; H bridge inversion unit (3) output inputs to T-shaped filter (4) input with single-phase grid-connected voltage alternating current 220V, and T-shaped filter (4) carries out shaping filter to the AC signal of H bridge inversion unit (3) output; T-shaped filter (4) output inputs to isolating transformer (5) input with alternating voltage 220V, and the introducing of isolating transformer (5) makes the electric fully insulation of primary side and secondary side; Isolating transformer (5) output inputs to single-phase electrical network (6) one ends with alternating voltage 220V through isolating switch.
2. a kind of parallel network power generation according to claim 1 and electric supply installation, it is characterized in that: photovoltaic battery panel model: RE180S, the drive circuit chip model of DC boosting type DC/DC converter unit: MIC4425BM, power field effect transistor switch mosfet pipe model: IPW60R045CP, H bridge inversion unit drives chip model: 6ED003L06-F, insulated gate bipolar transistor IGBT switching tube model: IKW30N60T, ferric phosphate lithium cell group model: HKE-IFP-480-10, system controller acp chip Infineon single-chip microcomputer model: XE164CM.
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| CN2012104609503A CN102916447A (en) | 2012-11-16 | 2012-11-16 | Photovoltaic grid-connected power generation and supply device |
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| CN104682443A (en) * | 2015-03-26 | 2015-06-03 | 厦门大学 | Photovoltaic power generation function based V2G system |
| CN107332453A (en) * | 2017-08-31 | 2017-11-07 | 青岛大学 | A kind of stage photovoltaic single off-network inverter and its control method |
| CN116454980A (en) * | 2023-06-15 | 2023-07-18 | 麦田能源股份有限公司 | Power conversion device and maximum power point tracking control method |
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| CN102355151A (en) * | 2011-09-28 | 2012-02-15 | 浙江大学 | Multi-functional grid-connected inverter and grid-connected inverter control method |
| US20120230066A1 (en) * | 2011-03-07 | 2012-09-13 | Allis Electric Co., Ltd. | Photovoltaic powered system |
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| US20100008119A1 (en) * | 2008-01-31 | 2010-01-14 | General Electric Company | Solar power generation stabilization system and method |
| CN101494385A (en) * | 2009-02-18 | 2009-07-29 | 常州瑞闪新能源有限公司 | Solar photovoltaic parallel inverter control system based on LCL filtering |
| CN101841160A (en) * | 2009-03-19 | 2010-09-22 | 孔小明 | Grid-connection control method for solar photovoltaic power generation |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104682443A (en) * | 2015-03-26 | 2015-06-03 | 厦门大学 | Photovoltaic power generation function based V2G system |
| CN107332453A (en) * | 2017-08-31 | 2017-11-07 | 青岛大学 | A kind of stage photovoltaic single off-network inverter and its control method |
| CN116454980A (en) * | 2023-06-15 | 2023-07-18 | 麦田能源股份有限公司 | Power conversion device and maximum power point tracking control method |
| CN116454980B (en) * | 2023-06-15 | 2023-09-01 | 麦田能源股份有限公司 | Power conversion device and maximum power point tracking control method |
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Application publication date: 20130206 |