CN106208951A - Photovoltaic off-grid electricity generation system - Google Patents
Photovoltaic off-grid electricity generation system Download PDFInfo
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- CN106208951A CN106208951A CN201610789357.1A CN201610789357A CN106208951A CN 106208951 A CN106208951 A CN 106208951A CN 201610789357 A CN201610789357 A CN 201610789357A CN 106208951 A CN106208951 A CN 106208951A
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- inductance
- electric capacity
- solar panel
- oxide
- semiconductor
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- 230000005611 electricity Effects 0.000 title claims abstract description 24
- 239000004065 semiconductor Substances 0.000 claims abstract description 23
- 230000008859 change Effects 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
- H02S40/32—Electrical components comprising DC/AC inverter means associated with the PV module itself, e.g. AC modules
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
- H02S40/38—Energy storage means, e.g. batteries, structurally associated with PV modules
-
- 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
-
- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of photovoltaic off-grid electricity generation system, including solar panel, off-network inverter, battery charger, accumulator and load, off-network inverter includes the first inductance, second inductance, 3rd inductance, 4th common mode inductance, first metal-oxide-semiconductor, first diode, PWM control unit and the first electric capacity, one end of first inductance is connected with the positive pole of solar panel, the other end of the first inductance is connected with the drain electrode of the first metal-oxide-semiconductor and the anode of the first diode respectively, the negative electrode of the first diode is connected with PWM control unit and battery charger respectively, the source electrode of the first metal-oxide-semiconductor respectively with the negative pole of solar panel, battery charger and PWM control unit connect, one end of second inductance is connected with PWM control unit.The present invention has MPPT maximal power tracing, efficiency is higher, cost is relatively low, the input voltage range of solar panel is wider.
Description
Technical field
The present invention relates to field of photovoltaic power generation, particularly to a kind of photovoltaic off-grid electricity generation system.
Background technology
Solar energy power generating can replace fossil energy such as resource-constrained, non-renewable coal, oil and natural gas
Source and the secondary energy sources being converted into by it.Popularization solar energy power generating is applied, to the consumption figure and the optimization that reduce fossil energy
Energy resource structure, significant.
Solar energy power generating does not damage the discharge of the pollutant of air and ecological environment, depends on for existence with the mankind
Clean energy resource that ecological environment is coordinated mutually and green energy resource.Popularization solar energy power generating is applied, it is possible to reduce carbon dioxide, two
The discharge capacity of the pollutant such as sulfur oxide and particulate matter, the effect the biggest to alleviation atmospheric pollution and performance of preserving the ecological environment.
Photovoltaic off-grid system is a kind of electricity generation system that photovoltaic energy is converted to electric energy.Existing market occur photovoltaic from
Net system includes: solar charger, accumulator and off-network inverter, the most as shown in Figure 1.Within the system, PWM charger
Being charged accumulator, off-network inverter passes through accumulator power taking, works for successive load after inversion.Conventional photovoltaic from
Net system has following defects that
First, PWM charger does not has maximal power tracing to process, and therefore solar panel institute generated energy can not maximum journey
Degree utilizes, and is wasted greatly.
Second, the energy of solar panel first passes through PWM charger and charges accumulator, is stored in the energy of accumulator
Amount again passes by the boosting of off-network inverter, and then copped wave is reverse into and is available for the alternating current that load uses.From solar panel to
Final load, through buck-boost-copped wave several stage, system whole efficiency is the highest, and energy dissipation is many.
3rd, because the energy of solar panel is wasted greatly, thus result in mini system in configuration too
During sun energy cell panel and accumulator, the actually used amount of solar panel and accumulator certainly will be amplified, so
Cause the increase of user cost.
4th, limited (input voltage range is less) by PWM charger input voltage, the configuration ratio of solar panel
More single.
5th, accumulator is charged by the energy of solar panel by PWM charger, thus determines configuration much
Solar panel be accomplished by configuring how powerful PWM charger, if the power of the solar panel of user compares
Greatly, now PWM charger must improve configuration accordingly, and the cost of client certainly will be caused to increase.
Summary of the invention
The technical problem to be solved in the present invention is, for the drawbacks described above of prior art, it is provided that one has MPPT
High-power tracking, the photovoltaic off-grid that efficiency is higher, cost is relatively low, the input voltage range of solar panel is wider generating are
System.
The technical solution adopted for the present invention to solve the technical problems is: a kind of photovoltaic off-grid electricity generation system of structure, including
Solar panel, off-network inverter, battery charger, accumulator and load, described off-network inverter include the first inductance,
Second inductance, the 3rd inductance, the 4th common mode inductance, the first metal-oxide-semiconductor, the first diode, PWM control unit and the first electric capacity, institute
The positive pole of one end and solar panel of stating the first inductance is connected, and the other end of described first inductance is respectively with described first
Metal-oxide-semiconductor drain electrode and the first diode anode connect, the negative electrode of described first diode respectively with described PWM control unit and
Battery charger connects, the source electrode of described first metal-oxide-semiconductor respectively with negative pole, the battery charger of described solar panel
Connecting with PWM control unit, one end of described second inductance is connected with described PWM control unit, another of described second electric capacity
End one end with described first electric capacity respectively is connected, and one end of described 3rd inductance is connected with described PWM control unit, and described the
The other end of three inductance is connected with the other end of described first electric capacity, one end of an inductance coil of described 4th common mode inductance
Being connected with the other end of described second inductance, the other end of an inductance coil of described 4th common mode inductance passes through live wire and institute
Stating load to connect, one end of another inductance coil of described 4th common mode inductance is connected with the other end of described 3rd inductance,
The other end of another inductance coil of described 4th common mode inductance is connected with described load by zero line, described accumulator and institute
State battery charger to connect.
In photovoltaic off-grid electricity generation system of the present invention, described off-network inverter also includes the second electric capacity and the 3rd electricity
Holding, one end of described second electric capacity is connected with the other end of described second inductance, the other end of described second electric capacity and described the
One end of three electric capacity connects and ground connection, and the other end of described 3rd electric capacity is connected with the other end of described 3rd inductance.
In photovoltaic off-grid electricity generation system of the present invention, described first metal-oxide-semiconductor is P-channel metal-oxide-semiconductor.
In photovoltaic off-grid electricity generation system of the present invention, by changing accounting for of the driving signal of described first metal-oxide-semiconductor
Empty ratio, the power after detection change, then increase the dutycycle of described driving signal when the power after described change increases, work as institute
When stating the minimizing of the power after change, then reduce the dutycycle of described driving signal.
In photovoltaic off-grid electricity generation system of the present invention, the input voltage range of described solar panel is 100V
～400V.
Implement the photovoltaic off-grid electricity generation system of the present invention, have the advantages that owing to using off-network inverter, electric power storage
Electrolytic battery charger and accumulator, off-network inverter include the first inductance, the second inductance, the 3rd inductance, the 4th common mode inductance, first
Metal-oxide-semiconductor, the first diode, PWM control unit and the first electric capacity, the inside of off-network inverter has MPPT (Maximum Power
Point Tracking, MPPT maximum power point tracking) maximum following function, it is possible to realize the maximum of solar panel output energy
Changing, therefore compared with traditional structure, in the case of load is identical, the configuration of solar panel can be less, reduces user
Cost, the energy of solar panel directly by off-network inverter to load, system whole efficiency is higher, energy dissipation
Few, part energy is simply stored in accumulator by battery charger, and major part energy is supported and consumes, and is therefore storing
In the configuration of battery charger, the power of battery charger can select less than traditional structure power many, solaode
The input voltage range of plate is wider, the configuration solar panel that user can be convenient, has provided the user more more options
Chance；So its there is MPPT maximal power tracing, efficiency is higher, cost is relatively low, the input voltage model of solar panel
Enclose wider.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, also may be used
To obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of conventional photovoltaic off-grid system in background technology；
Fig. 2 is the structural representation in one embodiment of photovoltaic off-grid electricity generation system of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
In photovoltaic off-grid electricity generation system embodiment of the present invention, the structural representation of this photovoltaic off-grid electricity generation system such as Fig. 2
Shown in.In Fig. 2, this photovoltaic off-grid electricity generation system includes solar panel 1, off-network inverter 2, battery charger 3, electric power storage
Pond 4 and load 5, wherein, off-network inverter 2 includes the first inductance L1, the second inductance L2, the 3rd inductance L3, the 4th common mode inductance
L4, the first metal-oxide-semiconductor Q1, first diode D1, PWM control unit U1 and the first electric capacity C1, one end of the first inductance L1 and the sun
Can the positive pole PV+ of cell panel 1 connect, the other end of the first inductance L1 respectively with drain electrode and first diode of the first metal-oxide-semiconductor Q1
The anode of D1 connects, and the negative electrode of the first diode D2 is connected with PWM control unit U1 and battery charger 3 respectively, a MOS
Pipe Q1, source electrode be connected with negative pole PV-, battery charger 3 and PWM control unit U1 of solar panel 1 respectively, second
One end of inductance L2 is connected with PWM control unit U1, and the other end of the second electric capacity C2 one end with the first electric capacity C1 respectively is connected.
In the present embodiment, one end of the 3rd inductance L3 is connected with PWM control unit U1, the other end of the 3rd inductance L3 and
The other end of one electric capacity C1 connects, and one end of an inductance coil of the 4th common mode inductance L4 connects with the other end of the second inductance L2
Connecing, the other end of an inductance coil of the 4th common mode inductance 5 is connected with loading by live wire L, another of the 4th common mode inductance
One end of individual inductance coil L4 is connected with the other end of the 3rd inductance L3, another inductance coil of the 4th common mode inductance L4 another
One end is connected with load 5 by zero line N, and accumulator 4 is connected with battery charger 3.
In the present embodiment, PWM control unit U1 can export pwm control signal, and this pwm control signal is the control of MPPT
Signal, realizes maximum power tracing for controlling the first metal-oxide-semiconductor Q1.By changing the duty driving signal of the first metal-oxide-semiconductor Q1
Ratio (such as increases), the power after detection change, and the power after changing is compared with state before, if the power after Gai Bianing increases
Big then change the dutycycle (i.e. increasing) driving signal according to same direction, if power reduces, change in opposite directions
Become the dutycycle (i.e. reducing) driving signal.
In the present embodiment, the inside of off-network inverter 2 has MPPT maximum following function, it is possible to realize solar panel
The maximization of 1 output energy, therefore compared with traditional structure, in the case of load 5 is identical, the configuration of solar panel 1
Can be less, thus reduce the cost of user.The energy of solar panel 1 by off-network inverter 2 to load 5, is directly
The efficiency of system entirety is higher, and energy dissipation reduces.Part energy is simply stored in accumulator 4, greatly by battery charger 3
Portion of energy is supported 5 and consumes, and therefore in the configuration of battery charger 3, the power of battery charger 3 can select
Less than traditional structure power is many.In the present embodiment, the input voltage range of solar panel 1 is wider, such as: input voltage
Scope can be 100V～400V, the configuration solar panel 1 that therefore user can be convenient, has provided the user more
The chance selected.Traditional PWM charger is to be unable to reach the widest voltage range.It follows that the present invention has
MPPT maximal power tracing, efficiency are higher, cost is relatively low, the input voltage range of solar panel is wider.
In the present embodiment, off-network inverter 2 also includes the second electric capacity C2 and the 3rd electric capacity C3, one end of the second electric capacity C2 with
The other end of the second inductance L2 connects, and the other end of the second electric capacity C2 and one end of the 3rd electric capacity C3 connect and ground connection, the 3rd electricity
The other end of the other end and the 3rd inductance L3 that hold C3 connects.
It is noted that in the present embodiment, the first metal-oxide-semiconductor Q1 is P-channel metal-oxide-semiconductor.Certainly, in actual applications,
One metal-oxide-semiconductor Q1 can also be N-channel MOS pipe, but at this moment the circuit structure of off-network inverter 2 also to change accordingly.
In a word, load 5 is directly supplied by 1 generated energy of the solar panel in the present invention by off-network inverter 2
Electricity, compared with traditional structure, intermediate conversion links reduces, and efficiency is higher.When the generated energy of solar panel 1 is more than load 5
Power consumption time, then dump energy is stored in accumulator 4.It has MPPT maximal power tracing function, and efficiency is higher, is
The holistic cost of system is relatively low, and the input voltage range of solar panel 1 is wider.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (5)
1. a photovoltaic off-grid electricity generation system, it is characterised in that include that solar panel, off-network inverter, accumulator are charged
Device, accumulator and load, described off-network inverter include the first inductance, the second inductance, the 3rd inductance, the 4th common mode inductance,
One metal-oxide-semiconductor, the first diode, PWM control unit and the first electric capacity, one end of described first inductance is with solar panel just
Pole connects, and the other end of described first inductance is connected with the drain electrode of described first metal-oxide-semiconductor and the anode of the first diode respectively, institute
The negative electrode stating the first diode is connected with described PWM control unit and battery charger respectively, the source electrode of described first metal-oxide-semiconductor
It is connected with negative pole, battery charger and the PWM control unit of described solar panel respectively, one end of described second inductance
Being connected with described PWM control unit, the other end of described second electric capacity one end with described first electric capacity respectively is connected, and described
One end of three inductance is connected with described PWM control unit, the other end of described 3rd inductance and the other end of described first electric capacity
Connecting, one end of an inductance coil of described 4th common mode inductance is connected with the other end of described second inductance, and the described 4th
The other end of one inductance coil of common mode inductance is connected with described load by live wire, another of described 4th common mode inductance
One end of inductance coil is connected with the other end of described 3rd inductance, another inductance coil of described 4th common mode inductance another
One end is connected with described load by zero line, and described accumulator is connected with described battery charger.
Photovoltaic off-grid electricity generation system the most according to claim 1, it is characterised in that described off-network inverter also includes second
Electric capacity and the 3rd electric capacity, one end of described second electric capacity is connected with the other end of described second inductance, described second electric capacity another
One end is connected with one end of described 3rd electric capacity and ground connection, the other end of described 3rd electric capacity and the other end of described 3rd inductance
Connect.
Photovoltaic off-grid electricity generation system the most according to claim 1 and 2, it is characterised in that described first metal-oxide-semiconductor is P-channel
Metal-oxide-semiconductor.
Photovoltaic off-grid electricity generation system the most according to claim 1, it is characterised in that by changing described first metal-oxide-semiconductor
Power after driving the dutycycle of signal, detection to change, then increases described driving signal when the power after described change increases
Dutycycle, when after described change power reduce time, then reduce the dutycycle of described driving signal.
Photovoltaic off-grid electricity generation system the most according to claim 4, it is characterised in that the input electricity of described solar panel
Pressure scope is 100V～400V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610789357.1A CN106208951A (en) | 2016-08-31 | 2016-08-31 | Photovoltaic off-grid electricity generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610789357.1A CN106208951A (en) | 2016-08-31 | 2016-08-31 | Photovoltaic off-grid electricity generation system |
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| Publication Number | Publication Date |
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| CN106208951A true CN106208951A (en) | 2016-12-07 |
Family
ID=58085440
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| CN201610789357.1A Pending CN106208951A (en) | 2016-08-31 | 2016-08-31 | Photovoltaic off-grid electricity generation system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011510483A (en) * | 2007-12-31 | 2011-03-31 | アドバンスト・エナジー・インダストリーズ・インコーポレイテッド | Interface device, system and method for inverter for photovoltaic cell |
| CN203398799U (en) * | 2012-09-13 | 2014-01-15 | 武汉金天新能源科技有限公司 | Photovoltaic inverter employing hybrid power device |
| KR20160001082A (en) * | 2014-06-26 | 2016-01-06 | (주) 이이시스 | Grid connected solar generation system using isolated converter |
| EP3016228A1 (en) * | 2014-10-29 | 2016-05-04 | Sungrow Power Supply Co., Ltd. | Photovoltaic power generation system, wind power generation system and control methods thereof |
-
2016
- 2016-08-31 CN CN201610789357.1A patent/CN106208951A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011510483A (en) * | 2007-12-31 | 2011-03-31 | アドバンスト・エナジー・インダストリーズ・インコーポレイテッド | Interface device, system and method for inverter for photovoltaic cell |
| CN203398799U (en) * | 2012-09-13 | 2014-01-15 | 武汉金天新能源科技有限公司 | Photovoltaic inverter employing hybrid power device |
| KR20160001082A (en) * | 2014-06-26 | 2016-01-06 | (주) 이이시스 | Grid connected solar generation system using isolated converter |
| EP3016228A1 (en) * | 2014-10-29 | 2016-05-04 | Sungrow Power Supply Co., Ltd. | Photovoltaic power generation system, wind power generation system and control methods thereof |
Non-Patent Citations (1)
| Title |
|---|
| RUI LI,XING LIANG,XINPEI LI,XU CAI: ""On/Off-Grid Integrated Photovoltaic Power generation system"", 《IEEE》 * |
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Application publication date: 20161207 |