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Photovoltaic power generation tracking control method and system
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A technology of tracking control and photovoltaic power generation, applied in the direction of using feedback control, etc., can solve the problems of power loss, solar radiation loss, and inability to increase power generation, and achieve the effect of increasing power generation and avoiding solar radiation loss
Active Publication Date: 2021-12-17
STATE NUCLEAR POWER AUTOMATION SYST ENGCO
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However, when the sun’s incident angle is relatively large in the morning and evening of a day, the upper end of the front row of photovoltaic panels adjacent to the photovoltaic array will cause shadows to the back row of photovoltaic panels, resulting in the loss of solar radiation
On the other hand, when there are dark clouds and the sun cannot be seen or it is foggy, the solar radiation is all diffuse radiation, and the radiation comes from all directions. At this time, the tracking method of the photovoltaic panel perpendicular to the sun's direct rays will not only fail to increase power generation, but also It will cause power loss due to the action of the tracking actuator
From the perspective of increasing power generation, the existing photovoltaic tracking technology still has a lot of room for improvement
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Embodiment 1
[0045] This embodiment provides a tracking control method for photovoltaic power generation, such as figure 1 shown, including:
[0046] Step S101, if the local time is greater than the sunrise time of the day and less than the sunset time of the day, obtain the corresponding sun position according to the local time.
[0047] In step S101, the local time and the local sunrise time and sunset time of the day need to be obtained, which may be obtained from a local storage or from a server through a network in a specific implementation.
[0048] Among them, the local time corresponds to the position of the sun one by one. For example, the sun position corresponding to 8:00 on May 1st, Beijing time is A1, the sun position corresponding to 10:00 on May 1st, Beijing time is A2, and the sun position corresponding to 12:00 on May 1st, New York time is B1, the sun position corresponding to 13:20 May 1, New York time is B2, the sun position corresponding to 9:00 May 1, Seoul time is C...
Embodiment 2
[0084] This embodiment provides a tracking control system 30 for photovoltaic power generation, such as image 3 As shown, it includes a position acquisition module 31 , a shadow calculation module 32 and a rotation control module 33 .
[0085] The position acquisition module is used to acquire the corresponding sun position according to the local time when the local time is greater than the sunrise time of the day and less than the sunset time of the day.
[0086] The shadow calculation module is used to calculate the shaded area on the photovoltaic panel.
[0087] In an optional implementation manner, each solar cell on the photovoltaic panel is connected in parallel with a bypass diode, and the shadow calculation module specifically includes:
[0088] The first calculation unit is used to calculate the number of shaded solar cells according to the conduction conditions of all bypass diodes;
[0089] The second calculation unit is used to calculate the shaded area on the p...
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Abstract
The invention discloses a tracking control method and system for photovoltaic power generation. The tracking control method of photovoltaic power generation includes: if the local time is greater than the sunrise time of the day and less than the sunset time of the day, then obtain the corresponding sun position according to the local time; calculate the shaded area on the photovoltaic panel; according to the sun position, The longitude and latitude information of the photovoltaic panel and the shaded area control the rotation of the photovoltaic panel. In the tracking control method of photovoltaic power generation provided by the present invention, the shaded area on the photovoltaic panel is combined with the sun position and the longitude and latitude information of the photovoltaic panel to control the rotation of the photovoltaic panel, which is different from the prior art that does not consider the shading of the photovoltaic panel. It avoids the loss of solar radiation caused by the shading of photovoltaic panels and improves the power generation.
Description
technical field [0001] The invention relates to the field of photovoltaic power generation, in particular to a tracking control method and system for photovoltaic power generation. Background technique [0002] With the continuous improvement of the cost performance of photovoltaic power generation, photovoltaic power generation technology has been widely used in the world. Photovoltaic tracking technology continuously tracks the real-time position of the sun in a day to ensure that the photovoltaic panel remains perpendicular to the direct sunlight, increasing the irradiance received by photovoltaics to obtain greater power generation. With the continuous advancement of domestic photovoltaic grid parity, it has become more and more consensus that photovoltaic tracking brackets replace fixed brackets in order to increase the overall power generation, thereby reducing the cost of electricity. [0003] There are mainly two problems in the photovoltaic tracking system of the p...
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