CN206115323U - Photovoltaic power generation system - Google Patents
Photovoltaic power generation system Download PDFInfo
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- CN206115323U CN206115323U CN201621196673.XU CN201621196673U CN206115323U CN 206115323 U CN206115323 U CN 206115323U CN 201621196673 U CN201621196673 U CN 201621196673U CN 206115323 U CN206115323 U CN 206115323U
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- photovoltaic
- mppt
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- microcontrollers
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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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Abstract
The utility model relates to a photovoltaic power generation system belongs to photovoltaic power generation, can be under light environment sudden change and the stable condition all the realization track maximum power point fast, including photovoltaic PV array and load, be provided with high accuracy light intensity sensor, high accuracy voltage sensor, high accuracy current sensor, MPPT microcontroller, IGBT driver, IGBT circuit, energy storage inductance, steady voltage electric capacity between photovoltaic PV array and load, a rectifier diode, MPPT microcontroller receives illumination, voltage and the current signal of photovoltaic PV array, and MPPT microcontroller passes through IGBT driver drive IGBT circuit, and steady voltage electric capacity is parallelly connected with the load. The utility model discloses a maximum power point is tracked fast to photovoltaic power generation system homoenergetic under the light environment sudden change and the stable condition, effectively improves the generating efficiency.
Description
Technical field
The utility model is related to field of photovoltaic power generation.
Background technology
Solar energy be have an optimistic view of the most currently with prospect, exploitation is the most ripe, the obvious regenerative resource of scale and benefit it
One, in recent years solar photovoltaic industry growth momentum is powerful and photovoltaic installed capacity is continuously increased.But, because illuminance is dashed forward
Become, photovoltaic is exerted oneself with fluctuation and intermittent shortcoming, and existing power system is incorporated on a large scale can increase operation risk, especially
Difficulty can be brought to peak-load regulating, hinder its development space.
At present, the extensive efficient utilization of photovoltaic generation is realized, illuminance need to exert oneself to photovoltaic generation when being mutated and carry out most
High-power fast track.Both at home and abroad existing achievement in research mainly for photovoltaic cell voltage, electric current curve of output it is non-linear
Feature, designs the photovoltaic generating system with different maximum power point tracking methods.It is different from existing photovoltaic system, this reality
Illuminance is obtained in real time using high accuracy optical sensor with novel photovoltaic power generation system, in system starts and photoenvironment
In the case of mutation, the relation being directly proportional to the natural logrithm of illuminance using photovoltaic PV array open circuits voltage is realizing photovoltaic
The maximum power point fast track function of electricity generation system；When photoenvironment is stable, using the variable quantity of conductance output electricity is equal to
Photovoltaic generating system reaches the principle of maximum power point, fast track maximum power point during the negative value led.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of photovoltaic generating system, is not turning off system load feelings
Under condition, illuminance is obtained in real time using high accuracy optical sensor, (photovoltaic abridges, and looking like is using photovoltaic PV：Light
Electricity) relation that array open circuit voltage is directly proportional to the natural logrithm of illuminance, the system open loop under any light intensity is obtained online
Voltage, and then by voltage of the output voltage control of photovoltaic PV arrays near maximum power point, using MPPT (Maximum
Power Point Tracking, i.e. MPPT maximum power point tracking) microcontroller make photovoltaic system start working just obtain approximate
Maximum power output, can under photoenvironment catastrophe fast track maximum power point, effectively improve photovoltaic PV array generators
Efficiency；When photoenvironment is stable, photovoltaic generating system reaches most when being equal to the negative value of output conductance using the variable quantity of conductance
The principle of high-power point, quick accurate tracking maximum power point.
The technical scheme that the utility model solves above-mentioned technical problem is as follows：
A kind of photovoltaic generating system, including photovoltaic PV arrays, high precision electro pressure sensor, high precision electric current transducer,
MPPT microcontrollers, IGBT drivers, IGBT circuits, accumulation of energy inductance, electric capacity of voltage regulation, load and the first commutation diode,
The voltage signal output end of photovoltaic PV arrays is believed by high precision electro pressure sensor with the voltage of MPPT microcontrollers
The connection of number input,
The current signal output end of photovoltaic PV arrays is believed by high precision electric current transducer with the electric current of MPPT microcontrollers
The connection of number input；
The voltage signal output end of photovoltaic PV arrays is also connected with one end of accumulation of energy inductance, and the other end of accumulation of energy inductance is simultaneously
It is connected with the colelctor electrode of IGBT circuits and the positive pole of the first commutation diode；
The current signal output end of photovoltaic PV arrays is connected with the emitter stage of IGBT circuits and one end of load simultaneously, loads
The other end be connected with the negative pole of the first commutation diode；
The electric capacity of voltage regulation is in parallel with load；
The drive signal output end of the MPPT microcontrollers is connected with the driving signal input of IGBT drivers, IGBT
The drive signal output end of driver is connected with the grid of IGBT circuits；
It is characterized in that：The system also includes high accuracy optical sensor, the illumination of the high accuracy optical sensor
Signal input part is connected with the luminance signal output end of photovoltaic PV arrays, the luminance signal output end of high accuracy optical sensor with
The luminance signal input connection of MPPT microcontrollers；
The MPPT microcontrollers are operated in double mode tracing mode, the root when system starts and photoenvironment are mutated
Maximum power point is carried out according to intensity of illumination approximately to track, photoenvironment carries out maximum work when stable according to the change of voltage and current
Rate point accurate tracking.
The beneficial effects of the utility model are：The system is a kind of photovoltaic generating system for approaching control in advance, it is easy to real
Existing, system response time soon, overcomes photovoltaic generating system when just starting working and photoenvironment is mutated, and maximum power tracing is fast
The slow problem of degree；When photoenvironment is stable, when the photovoltaic generating system is equal to the negative value of output conductance using the variable quantity of conductance
Photovoltaic generating system reaches the principle of maximum power point, and quick accurate speed follows the trail of maximum power point, keeps photovoltaic generating system
In maximum power output.
On the basis of above-mentioned technical proposal, the utility model can also do following improvement：
Further, the system also includes the second commutation diode and filter capacitor, and second commutation diode is connected on
Between photovoltaic PV arrays and accumulation of energy inductance, and the positive pole of the second commutation diode is connected with the voltage output end of photovoltaic PV arrays,
One end of the filter capacitor is connected with the negative pole of the second commutation diode, the other end of filter capacitor and the transmitting of IGBT circuits
Pole connects.
It is using the beneficial effect of above-mentioned further scheme：Second rectification diode and filter capacitor can filter photovoltaic generation
High fdrequency component when system is exported, reduces current ripples impact, makes photovoltaic generating system output more stable, reduces generation loss.
Further, in the system, the input being connected with high accuracy optical sensor on MPPT microcontrollers is provided with to be had
The parameters memorizing module of parameters memorizing function.
It is using the beneficial effect of above-mentioned further scheme：Luminance signal input on MPPT microcontrollers is provided with ginseng
Number memory module, can preserve historical parameter data for further research, optimization photovoltaic generating system.
Description of the drawings
Fig. 1 is photovoltaic power generation system structure figure described in the utility model.
In accompanying drawing, the list of parts representated by each label is as follows：
1st, photovoltaic PV arrays, 2, high accuracy optical sensor, 3, filter capacitor, 4, high precision electro pressure sensor, 5, high-precision
Degree current sensor, 6, MPPT microcontrollers, 7, IGBT drivers, 8, IGBT circuits, 9, accumulation of energy inductance, 10, electric capacity of voltage regulation,
11st, load, the 12, first commutation diode, the 13, second commutation diode.
Specific embodiment
Principle of the present utility model and feature are described below in conjunction with accompanying drawing, example is served only for explaining this practicality
It is new, it is not intended to limit scope of the present utility model.
Embodiment 1
As shown in figure 1, a kind of photovoltaic generating system, including photovoltaic PV arrays 1, high precision electro pressure sensor 4, high precision electro
Flow sensor 5, MPPT microcontrollers 6, IGBT drivers 7, IGBT circuits 8, accumulation of energy inductance 9, electric capacity of voltage regulation 10, load 11 and the
One commutation diode 12,
The voltage signal output end of photovoltaic PV arrays 1 is by high precision electro pressure sensor 4 and the voltage of MPPT microcontrollers 6
Signal input part connects,
The current signal output end of photovoltaic PV arrays 1 is by high precision electric current transducer 5 and the electric current of MPPT microcontrollers 6
Signal input part connects；
The voltage signal output end of photovoltaic PV arrays 1 is also connected with one end of accumulation of energy inductance 9, the other end of accumulation of energy inductance 9
It is connected with the colelctor electrode of IGBT circuits 8 and the positive pole of the first commutation diode 12 simultaneously；
The current signal output end of photovoltaic PV arrays 1 is connected with the emitter stage of IGBT circuits 8 and one end of load 11 simultaneously,
The other end of load 11 is connected with the negative pole of the first commutation diode 12；
The electric capacity of voltage regulation 10 is in parallel with load 11；
The drive signal output end of the MPPT microcontrollers 6 is connected with the driving signal input of IGBT drivers 7,
The drive signal output end of IGBT drivers 7 is connected with the grid of IGBT circuits 8；
It is characterized in that：The system also includes high accuracy optical sensor 2, the light of the high accuracy optical sensor 2
It is connected with the luminance signal output end of photovoltaic PV arrays 1 according to signal input part, the luminance signal output of high accuracy optical sensor 2
End is connected with the luminance signal input of MPPT microcontrollers 6；
The MPPT microcontrollers 6 are operated in double mode tracing mode, when system starts and photoenvironment are mutated
Maximum power point is carried out according to intensity of illumination approximately to track, photoenvironment carries out maximum when stable according to the change of voltage and current
Power points accurate tracking.
In the utility model, photovoltaic generating system is equipped with high accuracy optical sensor, in the case of system load is not turned off,
Illuminance is obtained in real time using high accuracy optical sensor, using photovoltaic PV array open circuits voltage and illuminance natural logrithm into
The relation of direct ratio, obtains online the system open loop voltage under any light intensity, then according to the maximum power point of photovoltaic PV arrays
Output voltage VrefWith system open loop voltage VocApproximate ratio relation：Vref=K*Voc(K is generally constant by experimental verification
0.76 error ± 2%), using MPPT microcontrollers photovoltaic generating system is made when starting working, just by the defeated of photovoltaic PV arrays
Go out at voltage of the voltage control near maximum power point, make photovoltaic generating system start working and just obtain approximate peak power
Output.
After photovoltaic generating system enters photoenvironment stable state, MPPT microcontrollers are equal to using the variable quantity of conductance
Photovoltaic generating system reaches the principle of maximum power point during the negative value of output conductance, according to high precision electro pressure sensor and high accuracy
The output voltage that current sensor measures current photovoltaic PV arrays and the electric current for flowing through, judge whether to reach maximum power point.
When system is not reaching to maximum power point, MPPT microcontrollers output signals to IGBT drivers and then control
IGBT connecting and disconnecting of the circuit：During IGBT circuit turn-ons, photovoltaic PV arrays give accumulation of energy induction charging, now electric capacity of voltage regulation electric discharge, to load
Power supply, makes have continuous electric current in load, and when IGBT circuits disconnect, accumulation of energy inductance charges to electric capacity of voltage regulation, and photovoltaic PV arrays are defeated
Go out voltage and inductance powers to the load jointly；By changing the circuit method of operation, the output voltage of photovoltaic PV arrays is adjusted, and then
Change the electric current of circuit, make photovoltaic generating system reach maximum power output when photoenvironment is stablized.
Photovoltaic generating system in the utility model is a kind of photovoltaic generating system for approaching control in advance, it is easy to accomplish,
System response time is fast, overcomes photovoltaic generating system when just starting working and photoenvironment is mutated, maximum power tracing speed
Slow problem；When photoenvironment is stable, the photovoltaic generating system quickly accurate speed can follow the trail of maximum power point, make photovoltaic generation system
System is maintained at maximum power output.
Further, including the second commutation diode 13 and filter capacitor 3, second commutation diode 13 is connected on photovoltaic
Between PV arrays 1 and accumulation of energy inductance 9, and the positive pole of the second commutation diode 13 is connected with the voltage output end of photovoltaic PV arrays 1,
One end of the filter capacitor 3 is connected with the negative pole of the second commutation diode 13, the other end and the IGBT circuits 8 of filter capacitor 3
Emitter stage connection.
In the improvement, the second rectification diode and filter capacitor can filter high fdrequency component when photovoltaic generating system is exported,
Reduce current ripples impact, make photovoltaic generating system output more stable, reduce generation loss.
Further, the input being connected with high accuracy optical sensor 2 on MPPT microcontrollers 6 is provided with parameters memorizing
The parameters memorizing module of function.
In the improvement, the luminance signal input on MPPT microcontrollers is provided with parameters memorizing module, can preserve history ginseng
Number data are used for further research, optimization photovoltaic generating system.
Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit the utility model
Within new spirit and principle, any modification, equivalent substitution and improvements made etc. should be included in guarantor of the present utility model
Within the scope of shield.
Claims (3)
1. a kind of photovoltaic generating system, including photovoltaic PV arrays (1), high precision electro pressure sensor (4), high precision electric current transducer
(5), MPPT microcontrollers (6), I GBT drivers (7), I GBT circuits (8), accumulation of energy inductance (9), electric capacity of voltage regulation (10), load
(11) and the first commutation diode (12),
The voltage signal output end of photovoltaic PV arrays (1) is by high precision electro pressure sensor (4) and the electricity of MPPT microcontrollers (6)
Pressure signal input part connection,
The current signal output end of photovoltaic PV arrays (1) is by high precision electric current transducer (5) and the electricity of MPPT microcontrollers (6)
Stream signal input part connection；
The voltage signal output end of photovoltaic PV arrays (1) is also connected with one end of accumulation of energy inductance (9), accumulation of energy inductance (9) it is another
End is connected with the colelctor electrode of IGBT circuits (8) and the positive pole of the first commutation diode (12) simultaneously；
The current signal output end of photovoltaic PV arrays (1) connects with the emitter stage of IGBT circuits (8) and one end of load (11) simultaneously
Connect, the other end for loading (11) is connected with the negative pole of the first commutation diode (12)；
The electric capacity of voltage regulation (10) is in parallel with load (11)；
The drive signal output end of the MPPT microcontrollers (6) is connected with the driving signal input of I GBT drivers (7),
The drive signal output end of IGBT drivers (7) is connected with the grid of IGBT circuits (8)；
It is characterized in that：The system also includes high accuracy optical sensor (2), the light of the high accuracy optical sensor (2)
It is connected with the luminance signal output end of photovoltaic PV arrays (1) according to signal input part, the luminance signal of high accuracy optical sensor (2)
Output end is connected with the luminance signal input of MPPT microcontrollers (6)；
The MPPT microcontrollers (6) are operated in double mode tracing mode, the root when system starts and photoenvironment are mutated
Maximum power point is carried out according to intensity of illumination approximately to track, photoenvironment carries out maximum work when stable according to the change of voltage and current
Rate point accurate tracking.
2. photovoltaic generating system as claimed in claim 1, it is characterised in that the system also includes the second commutation diode
(13) and filter capacitor (3), second commutation diode (13) is connected between photovoltaic PV arrays (1) and accumulation of energy inductance (9),
And second the positive pole of commutation diode (13) be connected with the voltage output end of photovoltaic PV arrays (1), the one of the filter capacitor (3)
End is connected with the negative pole of the second commutation diode (13), and the other end of filter capacitor (3) connects with the emitter stage of I GBT circuits (8)
Connect.
3. photovoltaic generating system as claimed in claim 1 or 2, it is characterised in that with high accuracy light on MPPT microcontrollers (6)
The parameters memorizing module with parameters memorizing function is provided with according to the input of sensor (2) connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621196673.XU CN206115323U (en) | 2016-11-04 | 2016-11-04 | Photovoltaic power generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621196673.XU CN206115323U (en) | 2016-11-04 | 2016-11-04 | Photovoltaic power generation system |
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| Publication Number | Publication Date |
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| CN206115323U true CN206115323U (en) | 2017-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621196673.XU Expired - Fee Related CN206115323U (en) | 2016-11-04 | 2016-11-04 | Photovoltaic power generation system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107219883A (en) * | 2017-06-14 | 2017-09-29 | 何金昌 | A kind of photovoltaic maximum power point tracking control system and method |
| CN107656550A (en) * | 2017-10-27 | 2018-02-02 | 广东电网有限责任公司茂名供电局 | A kind of video monitoring apparatus of achievable MPPT maximums light rate tracking |
| CN108363451A (en) * | 2018-01-24 | 2018-08-03 | 吴丹 | A kind of solar power generation variable step MPPT control devices and method |
| CN108828459A (en) * | 2018-08-17 | 2018-11-16 | 国网冀北电力有限公司张家口供电公司 | A kind of photovoltaic generation power output slip measuring device and its estimation method |
-
2016
- 2016-11-04 CN CN201621196673.XU patent/CN206115323U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107219883A (en) * | 2017-06-14 | 2017-09-29 | 何金昌 | A kind of photovoltaic maximum power point tracking control system and method |
| CN107656550A (en) * | 2017-10-27 | 2018-02-02 | 广东电网有限责任公司茂名供电局 | A kind of video monitoring apparatus of achievable MPPT maximums light rate tracking |
| CN108363451A (en) * | 2018-01-24 | 2018-08-03 | 吴丹 | A kind of solar power generation variable step MPPT control devices and method |
| CN108828459A (en) * | 2018-08-17 | 2018-11-16 | 国网冀北电力有限公司张家口供电公司 | A kind of photovoltaic generation power output slip measuring device and its estimation method |
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Granted publication date: 20170419 Termination date: 20171104 |