English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Aiming at the low generating efficiency of the current solar energy generating system, solar energy maximum power point tracking control system based on STC89C52 is designed and made. The photoelectric detection and tracking is adopted as the control mode in the system. By using stepping motor as driving mechanism, comprehensive trace of the sun is realized by controlling the movement of tracking mechanism in the horizontal and pitching directions. Based on this, real-time detection of wind velocity and change of wind direction is realized by wind velocity and direction transducer which is equipped on the tracking mechanism, which makes the system automatically avoid the typhoon above level 8 to weaken the damage to panel by the storm. The experiment results of model machine indicate that the system has reliable performance which can satisfy the need of auto-solar track, it can also make the panel orient towards east again after darkness to realize daily circular run and it is of relatively high practical value. Introduction With the continuous development of the society, the human being has a greater demand for energy sources[1]. At present, most of the energy sources we use are got from nonrenewable resources such as coal, petroleum, natural gas, etc., which are limited. Moreover, during the combustion process there will be plenty of greenhouse gases which bring environmental problems [2][3]. This fact makes people pay more attention to renewable resources among which solar energy has already been used for a certain period. In the common solar energy generating control system, panel stationary[4] solution is used. At the same time, solar energy[5][6][7] has the drawbacks including low density, intermittency and constant change of space distribution which lead to the low use ratio of solar energy for the present solar energy equipments. A maximum power automatic tracking control system moving with the sun from the practical perspective is designed in this paper, which effectively increases the utilization efficiency of solar energy. Hardware design of the system The whole hardware of the system is composed of control segment and driving segment. The control segment mainly includes STC89C52 main control panel, light intensity detection module, liquid crystal display, wind velocity and direction detection module and angle detection module. The driving segment mainly includes mechanism support, solar panel, worm-gear pair, stepping motor and its actuator. The driving structure of the system is shown in picture 2 and the hardware structure diagram of the whole system is shown in Fig. 1. Fig. 1Hardware structure diagram of the system 2nd International Conference on Electrical, Computer Engineering and Electronics (ICECEE 2015) © 2015. The authors Published by Atlantis Press 280 Fig. 2 3D diagram of drive structureof the system Fig. 3Top view of photoelectric detection module Circuit design of light intensity detection. Photoelectric detection circuit is mainly to detect the change of solar elevating angle and azimuth angle in order to realize the tracking and orientation of the sun. Top view of photoelectric detection module is shown in Fig. 3. Four totally same phototriodes are put in a light intensity collection plate of the cross type. The collection plate is divided into upper area, lower area, right area and left area by the cross. Phototriodes D1 and D2 are used to detect elevating angle of the sun while phototriodes D3 and D4 are used to accurately detect the azimuth angle of the sun. The solar panel will have the fine adjustment through the measurement of elevating angle and azimuth angle to make it directly face the sun. Schematic circuit diagram of photoelectric detection module is shown in Fig. 4.

Design of Solar Automatic Tracking Control System Based on STC89C52