CN105515051B - Photovoltaic system power optimization device intelligent control method - Google Patents
Photovoltaic system power optimization device intelligent control method Download PDFInfo
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- CN105515051B CN105515051B CN201610058708.1A CN201610058708A CN105515051B CN 105515051 B CN105515051 B CN 105515051B CN 201610058708 A CN201610058708 A CN 201610058708A CN 105515051 B CN105515051 B CN 105515051B
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- power
- string formation
- photovoltaic
- optimization device
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- 238000005457 optimization Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 35
- 238000012544 monitoring process Methods 0.000 claims abstract description 16
- 238000005755 formation reaction Methods 0.000 claims description 33
- 230000007423 decrease Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- -1 shadow occlusion Substances 0.000 description 1
- 238000013083 solar photovoltaic technology Methods 0.000 description 1
Classifications
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- H02J3/385—
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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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- Photovoltaic Devices (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The present invention provides a kind of photovoltaic system power optimization device intelligent control methods, collect the electrical signal data from photovoltaic array, and be conveyed to background monitoring system；Background monitoring system decides whether to perform work by power optimization device by the judgement to power.The present invention judges whether photovoltaic string formation is blocked by difference power between string formation, power optimization device is closed when unobstructed, power caused by the loss of power optimization device reduces when improving unobstructed, make photovoltaic system when unobstructed still can Maximum Power Output, not because power optimization device own loss generates decline.
Description
Technical field
The invention belongs to solar photovoltaic technology field, more particularly to a kind of photovoltaic system power optimization device intelligence
Control method.
Background technology
Because reasons, the photovoltaic systems such as component mismatch, dust, shadow occlusion, component temperature liter or breakage (hot spot effect) are real
Border generated energy lower than theoretical value 26%, photovoltaic plant can promote the power generation in power station by mounting assembly grade power optimization device
Amount, but actual optimization effect can because of weather, the reasons such as block and reach different effect, wherein, in the case of unobstructed, system
After access power optimizer, because of the loss of optimizer in itself, reality output electricity declines instead compared with electricity before access.
Invention content
In view of this, the present invention proposes a kind of photovoltaic system power optimization device intelligent control method, improves photovoltaic system and exists
Power caused by the loss of power optimization device reduces problem when unobstructed.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
A kind of photovoltaic system power optimization device intelligent control method, including：
(1) electrical signal data from photovoltaic array is collected, and is conveyed to background monitoring system；
(2) background monitoring system decides whether to perform work by power optimization device by the judgement to power.
Preferably, step (1) described electrical signal data includes voltage, electric current, power and each component of each photovoltaic module
Corresponding string formation number, component position number, by gateway collection and send background monitoring system to.
Preferably, the specific control method of step (2) is：
When photovoltaic system is blocked, power difference is larger between string formation, and background monitoring system is by power in low-power string formation
The optimization function of optimizer is opened, and performs optimization function；
When photovoltaic system is unobstructed, power difference is small between string formation, and background monitoring system is according to the judgement of difference power, by work(
The optimization function of rate optimizer is closed, and only carries out terminal box order.
Preferably, the judgment method of difference power is between the string formation：
(201) background monitoring system calculates every string formation power；
(202) all string formation power { P (G are calculatedn) in maximum value P (G)MAX；
(203) by other any string formations and P (G)MAXSubtract each other, obtain difference power, whether judgement difference power absolute value is less than rule
Fixed threshold value；
(204) difference power absolute value is less than or equal to defined threshold value, then the string formation is not blocked；
(205) difference power absolute value is more than defined threshold value, then the string formation receives partial occlusion.
Further, maximum power P (G) of the threshold value for string formation in photovoltaic systemMAX10%.
Relative to the prior art, photovoltaic system power optimization device intelligent control method of the present invention has following excellent
Gesture：
The present invention judges whether photovoltaic string formation is blocked by difference power between string formation, and power optimization is closed when unobstructed
Device, power caused by the loss of power optimization device reduces when improving unobstructed, makes photovoltaic system that can still export most when unobstructed
It is high-power, not because power optimization device own loss generates decline.
Description of the drawings
The attached drawing for forming the part of the present invention is used to provide further understanding of the present invention, schematic reality of the invention
Example and its explanation are applied for explaining the present invention, is not constituted improper limitations of the present invention.In the accompanying drawings：
Fig. 1 is the implementation process diagram of the method for the present invention.
Specific embodiment
It should be noted that in the absence of conflict, the feature in the embodiment of the present invention and embodiment can be mutual
Combination.
The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
As shown in Figure 1, steps taken is as follows in specific implementation by the present invention：
1. gateway is by acquiring the corresponding string formation G of voltage U, electric current I, power P and each component, the group of each photovoltaic module
Part position L data, send background monitoring system to.
2. background monitoring system calculates every string formation power P (Gn)。
3. calculate all string formation power { P (Gn) in maximum value P (G)MAX。
4. by other any string formations and P (G)MAXSubtract each other, obtain difference power Δ P.
Judge whether difference power Jue Dui Zhi ∣ Δ P ∣ are less than 10% of maximum power P (G) MAX of string formation in photovoltaic system.
Ruo ∣ Δs P ∣ ＞ 10%P (G) MAX, illustrates that the string formation receives partial occlusion.
1) judge whether the power optimization device optimization function that each photovoltaic module of the string formation is equipped with opens；
2) it has been switched on, then continues to keep；If being in off state, the optimization work(of the intelligent photovoltaic power optimization device is opened
Energy
Ruo ∣ Δ P ∣≤10%P (G) MAX, illustrates that the string formation is not blocked.
1) identify whether the optimization function of the intelligent photovoltaic power optimization device of the string formation all components all opens；
2) it has turned on, then closes optimization function, what is be turned off then continues to；
3) wiring kit function is performed.
5. perform loop command.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (3)
1. a kind of photovoltaic system power optimization device intelligent control method, which is characterized in that including：
(1) electrical signal data from photovoltaic array is collected, and is conveyed to background monitoring system；
(2) background monitoring system decides whether to perform work by power optimization device by the judgement to power；
Specifically control method is step (2)：
When photovoltaic system is blocked, power difference is larger between string formation, and background monitoring system is by power optimization in low-power string formation
The optimization function of device is opened, and performs optimization function；
When photovoltaic system is unobstructed, power difference is small between string formation, and background monitoring system is excellent by power according to the judgement of difference power
The optimization function of changing device is closed, and only carries out terminal box order；
The judgment method of difference power is between the string formation：
(201) background monitoring system calculates every string formation power；
(202) maximum value in all string formation power is calculated；
(203) other any string formations with maximum value are subtracted each other, obtains difference power, it is defined whether judgement difference power absolute value is less than
Threshold value；
(204) difference power absolute value is less than or equal to defined threshold value, then the string formation is not blocked；
(205) difference power absolute value is more than defined threshold value, then the string formation receives partial occlusion.
A kind of 2. photovoltaic system power optimization device intelligent control method according to claim 1, which is characterized in that step
(1) electrical signal data includes voltage, electric current, power and the corresponding string formation number of each component, the component position of each photovoltaic module
Number by gateway collection and sends background monitoring system to.
A kind of 3. photovoltaic system power optimization device intelligent control method according to claim 1, which is characterized in that the threshold
It is worth 10% for the maximum value of string formation 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105515051A CN105515051A (en) | 2016-04-20 |
| CN105515051B true CN105515051B (en) | 2018-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| 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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| 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 |
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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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Granted publication date: 20180619 Termination date: 20200128 |