CN102269998A - solar photovoltaic sun tracking control system and control method - Google Patents

Abstract

The present invention relates to a control system and control method for solar photovoltaic solar tracking. The control system includes a control device (1), a transmission device (2), a gyroscope device (3), an acceleration sensor (4) and a timer (5 ), the control device (1) is electrically connected to the transmission device (2), the gyroscope device (3) and the acceleration sensor (4) are electrically connected to the control device (1), and the control device (1) It is electrically connected with the timer (5). The solar photovoltaic solar tracking control system and control method of the present invention can realize precise tracking of the sun.

Description

Solar photovoltaic solar tracking control system and control method

technical field

The invention relates to a solar photovoltaic solar tracking control system and a control method, which belong to the technical field of photovoltaics.

Background technique

With the promotion of energy conservation and emission reduction, renewable energy has been more and more widely used. Among the renewable energy sources, solar energy is particularly valued due to its cleanliness and ease of acquisition. As the basic unit for obtaining solar energy, the conversion efficiency and output power of solar photovoltaic cell modules are directly related to the power generation efficiency of the entire solar power station.

In order to increase the output power of solar photovoltaic modules, people have developed a solar tracking system for photovoltaic cell modules. Through mechanical or other transmission devices, the photovoltaic cell modules are always facing the sun to obtain more direct sunlight for more time, thereby obtaining more power generation. Most of the technologies currently used use a transmission device, a control device, and a photosensitive sensor connected in series in sequence. The control device uses the photosensitive sensor to sense the offset of the light, thereby controlling the transmission device to adjust the horizontal and vertical inclination angles of the photovoltaic modules to obtain direct sunlight. The main problem with this method is that the installation of the photosensitive sensor requires high precision, and the accuracy needs to be corrected regularly during use. At the same time, when encountering cloudy and rainy days or partial shading conditions, the photosensitive sensor cannot work normally, which will affect the power generation efficiency of the battery panel.

In order to solve this kind of problem, people think of using the time and the position information of the solar panel to calculate the azimuth and altitude angle of the sun, so as to avoid the influence of climate. For example, the "solar active tracker" published in Chinese patent 201010215233.5 and the "sun tracking device and tracking method based on tracking attitude feedback" published in 200510094900.8 can effectively avoid the influence of climate on the solar tracking system, but the adjustment effect is not ideal. Lacking the perception function of the attitude of the solar panel itself, it is impossible to precisely control the solar panel to accurately realize the function of tracking the sun.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned shortcomings, and provide a solar photovoltaic solar tracking control system and control method capable of realizing accurate tracking of the sun.

The object of the present invention is achieved in this way: a solar photovoltaic solar tracking control system, the control system includes a control device, a transmission device, a gyroscope device, an acceleration sensor and a timer, and the control device is electrically connected to the transmission device , the gyroscope device and the acceleration sensor are electrically connected to the control device, and the control device is electrically connected to the timer; the control system is installed on the back side of the solar panel,

The steps of the solar photovoltaic solar tracking control method are:

Step 1: Set the current time on the timer, and start the timer to count normally, and at the same time input the local latitude and longitude information into the control device;

Step 2: The control device calculates the current azimuth and altitude of the sun according to the current time provided by the timer and the input local latitude and longitude information;

Step 3: Obtain the self-attitude information of the solar panel through the gyroscope device and the acceleration sensor;

Step 4: The control device adjusts the azimuth angle of the solar panel through the transmission device;

Step 5: The control device obtains the azimuth angle information of the solar panel through the gyroscope device. When it is found that the azimuth angle does not reach the azimuth angle calculated in step 2, return to step 4. If it reaches the azimuth angle calculated in step 2 , go to step six;

Step 6: The control device adjusts the height angle of the solar panel through the transmission device;

Step 7: The control device obtains the altitude angle information of the solar panel through the acceleration sensor. When it is found that the altitude angle does not reach the altitude angle calculated in step 2, return to step 6. If it reaches the azimuth angle calculated in step 2, Go to step eight;

Step 8: Return to Step 2 after a delay.

Compared with prior art, the beneficial effect of the present invention is:

The present invention uses a gyroscope device to perceive the horizontal inclination angle of the photovoltaic module, and an acceleration sensor to sense the vertical inclination angle of the photovoltaic module. By using the gyroscope and the acceleration sensor together, the horizontal and vertical inclination angles of the solar panel can be accurately sensed (that is, the corresponding azimuth can be obtained) Angle and altitude angle), so compared with the conventional method, the solar tracking system of the present invention is not affected by the environment, and can accurately realize the solar tracking function according to its own posture.

Description of drawings

Fig. 1 is the structural block diagram of the solar photovoltaic solar tracking control system of the present invention

Fig. 2 is a flow chart of the control method of the solar photovoltaic solar tracking control system of the present invention.

in:

Control device 1 , transmission device 2 , gyroscope device 3 , acceleration sensor 4 , timer 5 .

Detailed ways

Referring to Fig. 1, a solar photovoltaic solar tracking control system related to the present invention includes a control device 1, a transmission device 2, a gyroscope device 3, an acceleration sensor 4 and a timer 5, and the control device 1 is in phase with the transmission device 2 Electrically connected, used to adjust the horizontal and vertical directions of the transmission device 2, the gyro device 3 and the acceleration sensor 4 are electrically connected to the control device 1, and are used to sense the orientation information of the battery board, and the control device 1 and The timer 5 phases are electrically connected.

When in use, the solar photovoltaic solar tracking control system of the present invention is installed on the back of the solar panel.

Referring to Fig. 2, the steps of the control method of the solar photovoltaic solar tracking control system of the present invention are:

Step 1: Set the current time on the timer 5, and make the timer 5 start to count normally, and input the local latitude and longitude information into the control device 1;

Step 2: the control device 1 calculates the current solar azimuth and altitude according to the current time provided by the timer 5 and the input local latitude and longitude information;

Step 3: Obtain the attitude information of the solar panel through the gyroscope device 3 and the acceleration sensor 4; obtain the angle between the solar panel and the geomagnetic North Pole through the gyroscope device 3 (the angle is equivalent to the azimuth of the sun); through the acceleration sensor 4 Obtain the angle between the solar panel and the ground level (the angle is complementary to the sun's altitude angle);

Step 4: The control device 1 adjusts the azimuth angle of the solar panel through the transmission device 2; the adjustment of the transmission device 2 to the solar panel can adopt the azimuth mechanical rotation unit as adopted in the "solar tracker" patent, or Use any other form of slewing mechanism;

Step 5: The control device 1 obtains the azimuth information of the solar panel through the gyroscope device 3. When it is found that the azimuth angle does not reach the azimuth angle calculated in step 2, return to step 4. If the azimuth angle calculated in step 2 is reached corner, go to step six;

Step 6: The control device 1 adjusts the altitude angle of the solar panel through the transmission device 2; the adjustment of the solar panel by the transmission device 2 can adopt the altitude angle rotation unit adopted in the "solar tracker" patent, or can use Any other transmission mechanism;

Step 7: The control device 1 obtains the altitude angle information of the solar panel through the acceleration sensor 4. When it is found that the altitude angle does not reach the altitude angle calculated in step 2, return to step 6. If it reaches the azimuth angle calculated in step 2 , go to step eight;

Step 8: Return to Step 2 after the delay. In this embodiment, the delay time is set to five minutes.

Claims (2)

1. A solar photovoltaic solar tracking control system, characterized in that: the control system includes a control device (1), a transmission device (2), a gyroscope device (3), an acceleration sensor (4) and a timer (5 ), the control device (1) is electrically connected to the transmission device (2), the gyroscope device (3) and the acceleration sensor (4) are electrically connected to the control device (1), and the control device (1) It is electrically connected with the timer (5). 2. A solar photovoltaic solar tracking control method, characterized in that: the control method includes a solar photovoltaic solar tracking control system, and the control system includes a control device (1), a transmission device (2), and a gyroscope device (3), an acceleration sensor (4) and a timer (5), the control device (1) is electrically connected to the transmission device (2), and the gyroscope device (3) and the acceleration sensor (4) are connected to the control device (1) Phase electrical connection, the control device (1) is electrically connected to the timer (5), the control system is installed on the back of the solar panel, The steps of the solar photovoltaic solar tracking control method are: Step 1: Set the current time on the timer (5), and start the timer (5) to count normally, and at the same time input the local latitude and longitude information into the control device (1); Step 2: The control device (1) calculates the current azimuth and altitude of the sun according to the current time provided by the timer (5) and the input local latitude and longitude information; Step 3: Obtain the self-attitude information of the solar panel through the gyroscope device (3) and the acceleration sensor (4); Step 4: The control device (1) adjusts the azimuth angle of the solar panel through the transmission device (2); Step 5: The control device (1) obtains the azimuth angle information of the solar panel through the gyroscope device (3). When it is found that the azimuth angle does not reach the azimuth angle calculated in step 2, return to step 4. If it reaches the azimuth angle in step 2 When the azimuth is calculated, go to step six; Step 6: The control device (1) adjusts the height angle of the solar panel through the transmission device (2); Step 7: The control device (1) obtains the altitude angle information of the solar panel through the acceleration sensor (4). When it is found that the altitude angle does not reach the altitude angle calculated in step 2, return to step 6. If it reaches the altitude angle calculated in step 2 When the azimuth is out, go to step 8; Step 8: Return to Step 2 after a delay.

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