CN105515051A - Intelligent control method for photovoltaic system power optimizer - Google Patents
Intelligent control method for photovoltaic system power optimizer Download PDFInfo
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- CN105515051A CN105515051A CN201610058708.1A CN201610058708A CN105515051A CN 105515051 A CN105515051 A CN 105515051A CN 201610058708 A CN201610058708 A CN 201610058708A CN 105515051 A CN105515051 A CN 105515051A
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- power
- photovoltaic
- control method
- optimization device
- photovoltaic system
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000012544 monitoring process Methods 0.000 claims abstract description 16
- 238000005457 optimization Methods 0.000 claims description 25
- 230000033228 biological regulation Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000013083 solar photovoltaic technology Methods 0.000 description 1
Classifications
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- H02J3/385—
-
- 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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- Photovoltaic Devices (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The invention provides an intelligent control method for a photovoltaic system power optimizer. The intelligent control method collects electrical signal data from a photovoltaic array and transmits the electrical signal data to a background monitoring system; the background monitoring system devices whether to execute work through the power optimizer by judging power. By means of the series power difference, whether photovoltaic strings are shielded or not is judged, the power optimizer is closed when the photovoltaic strings are not shielded, the situation that due to loss of the power optimizer, when the photovoltaic strings are not shielded, power is lowered can be improved, the photovoltaic system can still output maximum power when the photovoltaic strings are not shielded, and the situation that due to loss of the power optimizer, the power is lowered can be avoided.
Description
Technical field
The invention belongs to solar photovoltaic technology field, particularly relate to a kind of photovoltaic system power optimization device intelligent control method.
Background technology
Because of assembly do not mate, dust, shade block, the reason such as assembly temperature rise or breakage (hot spot effect), photovoltaic system actual power generation is lower than theoretical value by 26%, photovoltaic plant can promote the energy output in power station by installation component level power optimization device, but actual optimization effect can because of weather, the reason such as to block and reach different effect, wherein, in unobstructed situation, system is after access power optimizer, because of the loss of optimizer itself, the actual electricity that exports declines on the contrary compared with electricity before access.
Summary of the invention
In view of this, the present invention proposes a kind of photovoltaic system power optimization device intelligent control method, improves the photovoltaic system power reduction problem that the loss of power optimization device causes when unobstructed.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of photovoltaic system power optimization device intelligent control method, comprising:
(1) collect the electrical signal data from photovoltaic array, and conveyed to background monitoring system;
(2) background monitoring system is by determining whether the judgement of power carrying out execution work by power optimization device.
Preferably, step (1) described electrical signal data comprises group string corresponding to the voltage of each photovoltaic module, electric current, power and each assembly number, assembly item data, sends background monitoring system to by gateway collection.
Preferably, the concrete control method of step (2) is:
When photovoltaic system is blocked, between group string, power difference is comparatively large, and the optimizational function of power optimization device on low-power group string is opened by background monitoring system, performs optimizational function;
When photovoltaic system is unobstructed, between group string, power difference is little, and the optimizational function of power optimization device, according to the judgement of difference power, is closed by background monitoring system, only performs terminal box order.
Preferably, between described group of string, the determination methods of difference power is:
(201) background monitoring system calculates every bar group string power;
(202) all groups of string power { P (G are calculated
n) in maximum P (G)
mAX;
(203) by other arbitrary group of string and P (G)
mAXsubtract each other, obtain difference power, judge whether difference power absolute value is less than the threshold value of regulation;
(204) difference power absolute value is less than or equal to the threshold value of regulation, then this group string is not blocked;
(205) difference power absolute value is greater than the threshold value of regulation, then this group string receives partial occlusion.
Further, described threshold value is organize the maximum power P (G) of string in photovoltaic system
mAX10%.
Relative to prior art, photovoltaic system power optimization device intelligent control method of the present invention has following advantage:
By difference power between group string, the present invention judges whether photovoltaic group string is blocked, power optimization device is closed time unobstructed, the power reduction that when improving unobstructed, the loss of power optimization device causes, make photovoltaic system still can Maximum Power Output when unobstructed, do not decline because power optimization device own loss produces.
Accompanying drawing explanation
The accompanying drawing forming a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the implementing procedure schematic diagram of the inventive method.
Embodiment
It should be noted that, when not conflicting, the feature in embodiments of the invention and embodiment can combine mutually.
Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
As shown in Figure 1, the step taked in concrete enforcement of the present invention is as follows:
1. gateway is by gathering the voltage U of each photovoltaic module, electric current I, power P and each assembly corresponding group string G, assembly item L data, sends background monitoring system to.
2. background monitoring system calculates every bar group string power P (G
n).
3. calculate all groups of string power { P (G
n) in maximum P (G)
mAX.
4. by other arbitrary group of string and P (G)
mAXsubtract each other, obtain difference power Δ P.
Judge whether difference power Jue Dui Zhi ∣ Δ P ∣ is less than in photovoltaic system 10% of maximum power P (G) MAX organizing string.
Ruo ∣ Δ P ∣ > 10%P (G) MAX, then illustrate that this group string receives partial occlusion.
1) judge this group go here and there each photovoltaic module be equipped with power optimization device optimizational function whether open;
2) open, then continue to keep; If closed condition, then open the optimizational function of this Intelligent photovoltaic power optimization device
Ruo ∣ Δ P ∣≤10%P (G) MAX, then illustrate that this group string is not blocked.
1) identify whether the optimizational function of the Intelligent photovoltaic power optimization device of this group string all component all opens;
2) open, then close optimizational function, buttoned-up, continue to maintain;
3) terminal box function is performed.
5. perform loop command.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a photovoltaic system power optimization device intelligent control method, is characterized in that, comprising:
(1) collect the electrical signal data from photovoltaic array, and conveyed to background monitoring system;
(2) background monitoring system is by determining whether the judgement of power carrying out execution work by power optimization device.
2. a kind of photovoltaic system power optimization device intelligent control method according to claim 1, it is characterized in that, step (1) described electrical signal data comprises group string corresponding to the voltage of each photovoltaic module, electric current, power and each assembly number, assembly item data, sends background monitoring system to by gateway collection.
3. a kind of photovoltaic system power optimization device intelligent control method according to claim 1, is characterized in that, the concrete control method of step (2) is:
When photovoltaic system is blocked, between group string, power difference is comparatively large, and the optimizational function of power optimization device on low-power group string is opened by background monitoring system, performs optimizational function;
When photovoltaic system is unobstructed, between group string, power difference is little, and the optimizational function of power optimization device, according to the judgement of difference power, is closed by background monitoring system, only performs terminal box order.
4. a kind of photovoltaic system power optimization device intelligent control method according to claim 3, it is characterized in that, between described group of string, the determination methods of difference power is:
(201) background monitoring system calculates every bar group string power;
(202) maximum in all groups of string power is calculated;
(203) other arbitrary group of string and maximum are subtracted each other, obtain difference power, judge whether difference power absolute value is less than the threshold value of regulation;
(204) difference power absolute value is less than or equal to the threshold value of regulation, then this group string is not blocked;
(205) difference power absolute value is greater than the threshold value of regulation, then this group string receives partial occlusion.
5. a kind of photovoltaic system power optimization device intelligent control method according to claim 4, is characterized in that, described threshold value is 10% of the maximum of group string power in photovoltaic system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610058708.1A CN105515051B (en) | 2016-01-28 | 2016-01-28 | Photovoltaic system power optimization device intelligent control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610058708.1A CN105515051B (en) | 2016-01-28 | 2016-01-28 | Photovoltaic system power optimization device intelligent control method |
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| Publication Number | Publication Date |
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| CN105515051A true CN105515051A (en) | 2016-04-20 |
| CN105515051B CN105515051B (en) | 2018-06-19 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610058708.1A Expired - Fee Related CN105515051B (en) | 2016-01-28 | 2016-01-28 | Photovoltaic system power optimization device intelligent control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112737496A (en) * | 2020-12-23 | 2021-04-30 | 合肥阳光新能源科技有限公司 | Method and system for detecting surface dust deposition of photovoltaic module and photovoltaic power generation system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103000720A (en) * | 2011-09-09 | 2013-03-27 | 苏州快可光伏电子股份有限公司 | Smart connecting box |
| CN103516304A (en) * | 2012-06-18 | 2014-01-15 | 广东旭粤新能源科技有限公司 | A photovoltaic power optimizer and an optimization method thereof |
| CN203883764U (en) * | 2014-04-30 | 2014-10-15 | 广西师范大学 | Photovoltaic generation array with solar power optimizers |
| CN105245104A (en) * | 2015-10-30 | 2016-01-13 | 江阴万事兴技术有限公司 | Intelligent photovoltaic power adjustor and adjusting method |
-
2016
- 2016-01-28 CN CN201610058708.1A patent/CN105515051B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103000720A (en) * | 2011-09-09 | 2013-03-27 | 苏州快可光伏电子股份有限公司 | Smart connecting box |
| CN103516304A (en) * | 2012-06-18 | 2014-01-15 | 广东旭粤新能源科技有限公司 | A photovoltaic power optimizer and an optimization method thereof |
| CN203883764U (en) * | 2014-04-30 | 2014-10-15 | 广西师范大学 | Photovoltaic generation array with solar power optimizers |
| CN105245104A (en) * | 2015-10-30 | 2016-01-13 | 江阴万事兴技术有限公司 | Intelligent photovoltaic power adjustor and adjusting method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112737496A (en) * | 2020-12-23 | 2021-04-30 | 合肥阳光新能源科技有限公司 | Method and system for detecting surface dust deposition of photovoltaic module and photovoltaic power generation system |
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| CN105515051B (en) | 2018-06-19 |
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Address after: Jiangyin city streets east of golden hill road 214400 Jiangsu city of Wuxi province No. 201 Cyberport Powerise Industrial Park building A on the third floor of the South Applicant after: Jiangyin Binlong Technology Co., Ltd. Address before: Jiangyin city streets east of golden hill road 214434 Jiangsu city of Wuxi province No. 201 Cyberport Powerise Industrial Park building A on the third floor of the South Applicant before: Jiangyin EVERISE Technology Co., Ltd. |
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Effective date of registration: 20181225 Address after: 610500 R&D Building No. 1 Jinhe Industrial Park, East Industrial Zone, Xindu District, Chengdu City, Sichuan Province Patentee after: Chengdu Chuangda Automation Control Co., Ltd. Address before: 214400 Jinshan Road 201, Chengdong Street, Jiangyin City, Wuxi City, Jiangsu Province Patentee before: Jiangyin Binlong Technology Co., Ltd. |
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