CN111092594A - Tracking integration system and method suitable for double-sided photovoltaic module - Google Patents
Tracking integration system and method suitable for double-sided photovoltaic module Download PDFInfo
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- CN111092594A CN111092594A CN202010062649.1A CN202010062649A CN111092594A CN 111092594 A CN111092594 A CN 111092594A CN 202010062649 A CN202010062649 A CN 202010062649A CN 111092594 A CN111092594 A CN 111092594A
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- 230000010354 integration Effects 0.000 title claims abstract description 17
- 238000004891 communication Methods 0.000 claims description 10
- 238000010248 power generation Methods 0.000 abstract description 13
- 238000012986 modification Methods 0.000 description 2
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- 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
- H02S20/00—Supporting structures for PV modules
- H02S20/30—Supporting structures being movable or adjustable, e.g. for angle adjustment
- H02S20/32—Supporting structures being movable or adjustable, e.g. for angle adjustment specially adapted for solar tracking
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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
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Abstract
The invention discloses a tracking integration system and a tracking integration method suitable for a double-sided photovoltaic module, wherein the tracking integration system comprises a main control module, a tracking module and a tracking module, wherein the main control module is used for controlling the disturbance of an azimuth angle of a tracking bracket in a preset angle interval in which the solar azimuth angle is positioned; and the control device is used for controlling the tracking support to rotate to a target angle by taking the azimuth angle of the tracking support corresponding to the maximum current as the target angle in a disturbance process. The invention also provides a photovoltaic power generation sun tracking control method which is realized through the control system. By adopting the technical scheme, the tracking integration system and the method suitable for the double-sided photovoltaic module are characterized in that an arithmetic device in the system autonomously calculates and obtains the solar azimuth angle in real time, data are directly acquired, no data delay exists, the number of flow links is minimum, and the system is more efficient; the current data is collected nearby through the current collection module, so that the method is direct and efficient; the device does not depend on other external auxiliary equipment, can work independently and has the strongest adaptability.
Description
Technical Field
The invention relates to a tracking integration system and method suitable for a double-sided photovoltaic module, and belongs to the technical field of photovoltaic power station control.
Background
With the release of the policy of no subsidy flat price internet access in photovoltaic power generation, the cost reduction of the photovoltaic power station becomes the aim of each photovoltaic power station manager to implement in the actual production by improving the photovoltaic power generation amount. The photovoltaic tracking controller can adjust the angle of the photovoltaic tracking support, reduce the solar incident angle to the maximum extent, and improve the solar incident irradiation intensity, so that the generated energy is improved. Firstly, the current commonly used tracking controller takes the power value of a photovoltaic power generation system as a feedback value, and the change of the tracking angle directly influences the current value in the photovoltaic power generation system, so that the change of voltage is increased by taking the power value as the feedback value, and the tracking precision is influenced; secondly, the current tracking controller needs to use the inverter as an upper computer, and the inverter sends data to the controller, but this causes data delay, and in addition, sometimes there is no available inverter near the controller, and communication connection cannot be established between the controller and the inverter.
Chinese patent document CN105589506A discloses a power tracking method, device and photovoltaic power generation system, wherein an inverter sends an indication signaling to a tracking support controller, so that the tracking support controller controls the power tracking process of a photovoltaic power generation array, thereby enabling the inverter and the tracking support controller to perform power tracking at different times, avoiding power tracking interference between the inverter and the tracking support controller, thereby improving power tracking efficiency of the photovoltaic power generation system, and further improving the power generation amount of the photovoltaic power generation system. However, it has the following disadvantages: 1. the tracking angle is changed mainly to improve the absorbable irradiation amount, the directly affected string output variable is current, and the scheme uses power tracking, wherein voltage disturbance is also included to affect the tracking accuracy. 2. The sun angle and the environmental irradiation change every moment, the inverter is required to send a plurality of instructions to the controller, and the work flow and the data delay both have adverse effects on the tracking efficiency of the device. 3. The core of the scheme is that an inverter is required to be integrated on one hand, and a communication connection is required to be established between the inverter and a controller on the other hand. The drawback is that there are no inverters available near many plant tracking rack controllers (more distant inverters cause more data delay), a communication connection between the controller and the inverter cannot be established and the communication connection is not necessarily stable.
Disclosure of Invention
Therefore, the invention aims to provide a tracking integration system and a tracking integration method suitable for a double-sided photovoltaic module, which do not depend on other external auxiliary equipment to provide operation data, can work independently and have stronger adaptability.
In order to achieve the above object, the present invention provides a tracking integration system suitable for a double-sided photovoltaic module, comprising:
the main control module is respectively connected with the astronomical algorithm module and the current acquisition module and is used for acquiring astronomical data which is sent by the astronomical algorithm module and comprises a solar azimuth angle; the solar tracking device is used for controlling the disturbance of the azimuth angle of the tracking support in a preset angle interval of the solar azimuth angle; the device is used for acquiring current data of the current acquisition module, and controlling the tracking support to rotate to a target angle by taking the azimuth angle of the tracking support corresponding to the maximum current as the target angle in a disturbance process;
the astronomical algorithm module is used for determining astronomical data comprising a solar azimuth angle and sending the astronomical data to the main control module;
and the current acquisition module is used for acquiring and tracking current data of the photovoltaic group string on the support and sending the current data to the main control module.
The main control module is also used for re-determining the solar azimuth angle at the moment after the preset interval time.
And the astronomical algorithm module sends astronomical data to the main control module in an RS485 communication mode.
The current acquisition module adopts a Hall coil or a current divider to acquire and track current data of a photovoltaic group string on the support.
And the current acquisition module sends current data to the main control module in an RS485 communication mode.
The invention also provides a photovoltaic power generation sun tracking control method, which comprises the following steps:
controlling the azimuth angle of the tracking support to be disturbed in a preset angle interval in which the sun azimuth angle is located according to the sun azimuth angle at the current moment;
judging the azimuth angle of the tracking support when the current data of the photovoltaic string is maximum in the disturbance process, and taking the azimuth angle of the tracking support as a target angle;
and controlling the tracking support to rotate to the target angle.
The photovoltaic power generation sun tracking control method further comprises the following steps:
and re-determining the solar azimuth angle at the moment after the preset interval time.
By adopting the technical scheme, the tracking integration system and the method suitable for the double-sided photovoltaic module are characterized in that an arithmetic device in the system autonomously calculates and obtains the solar azimuth angle in real time, data are directly acquired, no data delay exists, the number of flow links is minimum, and the system is more efficient; the current data is collected nearby through the current collection module, so that the method is direct and efficient; the device does not depend on other external auxiliary equipment, can work independently and has the strongest adaptability.
Drawings
Fig. 1 is a block diagram of a tracking integration system suitable for a bifacial photovoltaic module according to the present invention.
Detailed Description
The invention is described in further detail below with reference to the figures and the detailed description.
As shown in fig. 1, the tracking integration system suitable for a double-sided photovoltaic module of the present invention includes a main control module, an astronomical algorithm module, and a current collection module.
The astronomical algorithm module 12 is configured to determine astronomical data including a solar azimuth, and transmit the astronomical data to the main control module. The current collection module 13 is used for collecting and tracking current data of the photovoltaic string on the bracket and sending the current data to the main control module. The main control module 11 is connected with the astronomical algorithm module 12 and the current acquisition module 13 respectively. The main control module 11 is configured to obtain astronomical data including a solar azimuth angle, which is sent by the astronomical algorithm module 12; the solar tracking device is used for controlling the disturbance of the azimuth angle of the tracking support in a preset angle interval of the solar azimuth angle; and the tracking control module is used for acquiring current data of the current acquisition module 13, and controlling the tracking support to rotate to a target angle by taking the azimuth angle of the tracking support corresponding to the maximum current as the target angle in a disturbance process. The preset angle interval can be adjusted according to actual needs, and after the angle interval is preset, the main control module 11 can control the tracking support to perform disturbance in the interval, so that the tracking support swings to different angles in a disturbance process to determine the azimuth angle of the tracking support during maximum current data.
The main control module 11 is further configured to re-determine the solar azimuth at the moment after a preset interval time elapses, then repeat the disturbance operation, and adjust the azimuth of the tracking bracket after re-determining the target angle.
In an embodiment of the present invention, the astronomical algorithm module 12 sends astronomical data to the main control module 11 in an RS485 communication manner. The current collection module 13 collects current data of the photovoltaic string on the tracking support by using a hall coil or a current divider, and sends the current data to the main control module 11 in an RS485 communication mode.
An arithmetic device in the system autonomously calculates and obtains the solar azimuth angle in real time, data are directly collected, no data delay exists, the number of flow links is minimum, and the system is more efficient; the current data is collected through the current collection module 13, so that the method is direct and efficient; the device does not depend on other external auxiliary equipment, can work independently and has the strongest adaptability.
The invention also provides a control method of the tracking integrated system suitable for the double-sided photovoltaic module, which comprises the following steps:
controlling the azimuth angle of the tracking support to be disturbed in a preset angle interval in which the sun azimuth angle is located according to the sun azimuth angle at the current moment;
judging the azimuth angle of the tracking support when the current data of the photovoltaic string is maximum in the disturbance process, and taking the azimuth angle of the tracking support as a target angle;
and controlling the tracking support to rotate to the target angle.
The photovoltaic power generation sun tracking control method further comprises the following steps:
and re-determining the solar azimuth angle at the moment after the preset interval time.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (7)
1. A tracking integration system suitable for a bifacial photovoltaic module, comprising:
the main control module is respectively connected with the astronomical algorithm module and the current acquisition module and is used for acquiring astronomical data which is sent by the astronomical algorithm module and comprises a solar azimuth angle; the solar tracking device is used for controlling the disturbance of the azimuth angle of the tracking support in a preset angle interval of the solar azimuth angle; the device is used for acquiring current data of the current acquisition module, and controlling the tracking support to rotate to a target angle by taking the azimuth angle of the tracking support corresponding to the maximum current as the target angle in a disturbance process;
the astronomical algorithm module is used for determining astronomical data comprising a solar azimuth angle and sending the astronomical data to the main control module;
and the current acquisition module is used for acquiring and tracking current data of the photovoltaic group string on the support and sending the current data to the main control module.
2. The integrated tracking system for bifacial photovoltaic modules of claim 1, wherein: the main control module is also used for re-determining the solar azimuth angle at the moment after the preset interval time.
3. A tracking integration system suitable for use in a bifacial photovoltaic module as claimed in claim 1 or 2, wherein: and the astronomical algorithm module sends astronomical data to the main control module in an RS485 communication mode.
4. A tracking integration system suitable for use in a bifacial photovoltaic module as claimed in claim 1 or 2, wherein: the current acquisition module adopts a Hall coil or a current divider to acquire and track current data of a photovoltaic group string on the support.
5. The integrated tracking system for bifacial photovoltaic modules of claim 4, wherein: and the current acquisition module sends current data to the main control module in an RS485 communication mode.
6. The control method of a tracking integration system for bifacial photovoltaic modules according to any one of claims 1 to 5, comprising the steps of:
controlling the azimuth angle of the tracking support to be disturbed in a preset angle interval in which the sun azimuth angle is located according to the sun azimuth angle at the current moment;
judging the azimuth angle of the tracking support when the current data of the photovoltaic string is maximum in the disturbance process, and taking the azimuth angle of the tracking support as a target angle;
and controlling the tracking support to rotate to the target angle.
7. The control method according to claim 6, characterized in that: and re-determining the solar azimuth angle at the moment after the preset interval time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010062649.1A CN111092594A (en) | 2020-01-19 | 2020-01-19 | Tracking integration system and method suitable for double-sided photovoltaic module |
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| CN202010062649.1A CN111092594A (en) | 2020-01-19 | 2020-01-19 | Tracking integration system and method suitable for double-sided photovoltaic module |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111693020A (en) * | 2020-06-22 | 2020-09-22 | 合肥阳光新能源科技有限公司 | Photovoltaic string azimuth angle determining method, string recombination method and related device |
| CN113126660A (en) * | 2021-04-20 | 2021-07-16 | 阳光电源股份有限公司 | Photovoltaic module tracking control method and related device |
| CN113268090A (en) * | 2021-05-20 | 2021-08-17 | 江苏中信博新能源科技股份有限公司 | Tracking control method and system for distributed photovoltaic tracking support |
| CN113867421A (en) * | 2021-11-19 | 2021-12-31 | 晟维新能源科技发展(天津)有限公司 | Intelligent tracking control system applied to photovoltaic tracking support |
-
2020
- 2020-01-19 CN CN202010062649.1A patent/CN111092594A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111693020A (en) * | 2020-06-22 | 2020-09-22 | 合肥阳光新能源科技有限公司 | Photovoltaic string azimuth angle determining method, string recombination method and related device |
| CN111693020B (en) * | 2020-06-22 | 2022-09-16 | 阳光新能源开发股份有限公司 | Photovoltaic string azimuth angle determining method, string recombination method and related device |
| CN113126660A (en) * | 2021-04-20 | 2021-07-16 | 阳光电源股份有限公司 | Photovoltaic module tracking control method and related device |
| CN113126660B (en) * | 2021-04-20 | 2023-09-29 | 阳光电源股份有限公司 | Photovoltaic module tracking control method and related device |
| CN113268090A (en) * | 2021-05-20 | 2021-08-17 | 江苏中信博新能源科技股份有限公司 | Tracking control method and system for distributed photovoltaic tracking support |
| CN113867421A (en) * | 2021-11-19 | 2021-12-31 | 晟维新能源科技发展(天津)有限公司 | Intelligent tracking control system applied to photovoltaic tracking support |
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