Two-axis numerical control positioning method and system for solar power generation panel group

Abstract

The invention provides a biaxial computer-numerical-control positioning method of solar panels. The method includes the steps: a GPS (global positioning system) provides latitude and longitude of a local and time service data, sunrise time and sunset time of a current day are calculated, a maximum of solar attitude of the current day and running total of azimuth are calculated, the time with the maximum solar attitude is determined as noon time of the current day, changes in the solar attitude and the azimuth per unit of time from the sunrise to the noon time are calculated, single feed of an attitude drive unit and that of an azimuth drive unit are controlled according to the changes, and the solar panels and the sun are synchronously positioned constantly. By the use of the method, high solar panel positioning precision and high power generation efficiency are achieved. The invention further provides a biaxial computer-numerical-control positioning system of solar panels. The system comprises a controller and a positioning actuator. The controller comprises a satellite data receiving unit, a data processing unit and a control signal transceiving unit. The positioning actuator comprises the attitude drive unit and the azimuth drive unit. A group of controllers is applicable to controlling multiple groups of positioning actuators, and configuration cost is low.

Description

technical field [0001] The invention relates to solar power generation technology, in particular to a dual-axis numerical control positioning method and system for a solar power generation panel group. Background technique [0002] At present, the four main sources of electric energy are thermal power, hydropower, wind power and nuclear power. Although thermal power generation pollutes the environment, hydropower generation increases geological disasters, wind power generation utilization rate is low, and nuclear power generation safety hazards are serious; but they all have the advantage of low operating costs, so at present, more than 90% of the world's power comes from thermal power generation, Hydro, wind and nuclear power. [0003] With the increasingly serious energy crisis and environmental pollution, solar power generation has become the main development direction of new energy. However, compared with coal, water and gas power generation, the current solar power gen...

AI Technical Summary

Problems solved by technology

Although thermal power generation pollutes the environment, hydropower generation increases geological disasters, wind power generation utilization rate is low, and nuclear power generation safety hazards are serious; but they all have the advantage of low operating costs, so at present, more than 90% of the world's power comes from thermal power generation, Hydro, wind and nuclear power

[0003] With the increasingly serious energy crisis and environmental pollution, solar power generation has become the main development direction of new energy. However, compared with coal, water and gas power generation, the current solar power generation technology has too high cost, low profit and poor practicability. Therefore how to reduce the cost of solar power generation has become a difficult problem to be solved urgently in the technical field

[0004] The reduction of the cost of solar power generation should be realized from many aspects, among which, the real-time positioning of the solar power generation panel group is a very important aspect. At present, the real-time positioning of the solar power generation panel group mainly has the following problems: 1. The solar power generation panel group The error between the real-time positioning position and the theoretical optimal position is large, and the positioning accuracy is low, which affects the power generation efficiency of the power generation panel group; 2. Each solar power generation panel group is equipped with a set of control devices separately, so the configuration cost is high and the maintenance cost is high. also high

Obviously, the method of using photoelectric tracking to find the position of the sun is to search for regular targets as irregular targets, which complicates the simple work; in addition, if the sun reappears after being blocked by clouds for several hours in a certain period of time, Then, after the four-quadrant photosensitive sensor determines the position of the sun, the solar power generation panel group must rotate a large angle in the up, down, left and right directions to complete the tracking of the sun. This process requires a certain amount of time. During this process, if the sun If it is blocked by the cloud again, the solar power generation panel group will stay on the way under the action of the control unit. There is a certain gap between the stop position of the solar power generation panel group and the blocked sun position. The loss of power generation efficiency is very large; in addition, if any of the four sensors of the four-quadrant photosensitive sensor is blocked by dust and other sundries, the solar power generation panel group will malfunction, which will directly affect the normal operation of the solar power generation equipment.

All of the above lead to low power generation efficiency of photoelectric tracking solar power generation panels

[0006] Program tracking actually overcomes the above-mentioned defects of photoelectric tracking and performs real-time positioning of solar power generation panels according to the sun’s operating laws. to calculate the orbits of the sun and the earth, relative positions, etc., if there is no professional astronomical almanac (the height of the sun at a certain reference point at any time of the year), the calculation is quite complicated, and the non-noon solar altitude angle is calculated It is more troublesome. In short, the calculation of the sun position at a certain moment can be achieved, and can achieve a certain accuracy, but the continuous calculation and control of the minute by minute will accumulate errors, resulting in large real-time positioning errors of the solar power generation panel group; of course, it is also possible Relatively accurate calculations are performed using non-sun stars in the Milky Way, such as the Polaris, but the algorithm is too complex, which makes the programming investment cost too high, and the step-by-step calculation control will still accumulate large errors, which will eventually lead to the problem of low power generation efficiency.

The automatic tracking technology of photoelectric tracking + program tracking combines the advantages of the two, which improves the positioning accuracy of the solar power generation panel group, thereby improving the power generation efficiency. However, after combining these two complex technical means, Not only increase the configuration cost and operation cost, but also the whole system is more complicated

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