Design And Development Of The Electro-hydraulic Control System For The Solar Heat Collection Device

With the rapid development of economy, human demand for energy is increasing.However, the limitation of energy will become the bottleneck, which restricts theprogress of society, in the near future. At the same time, in the process of developmentand utilization of energy has caused concern of environmental problems. Therefore,developing and utilizing the energy, especially the renewable energy, has become thenecessary choice of humans. Solar energy has been paid more and more attentionduring the process, by its advantages of clean, reproducible and infinity. Solar thermalpower generation is the important way in the use of solar energy, and the trough typesolar thermal power generation technology is the maturest among the different kind ofheat generation, which has achieved commercial operation in the developed countries.How to improve solar energy utilization and cut generation system become the two bigquestions. According to the function of the device, the thesis plans and designs electro-hydraulic servo control system of the trough type solar thermal power generationsystem, and a kind of method of tracking the sun has been put forward to use solarenergy efficiently.By analyzing the structure and the motion characteristics of trough type solarenergy collecting-heat device, the hydraulic driving system has been designed to drivethe collection-heat device, and simulated and analyzed in AMESim. By analyzing themethod of tracking the sun at present, a method of single axis tracking the sun hasbeen put forward. Firstly, a photoelectric sensor of high precision and wide range forsearching the sun position has been designed, real-time monitoring the deviation signalof the sun position, and inputted single chip microcomputer after circuit processing,thus the sun deviation angle is got, then through certain control algorithm to drivehydraulic system, therefore tracking the sun is come true. Secondly, based on thefunctional plan of control system, the controller’s hardware circuit design and softwareprogramming have been accomplished. Finally, the performance of electro-hydraulic control system of trough type electric station has been verified by software simulation,program debugging and experimental verification. The results show that thephotoelectric sensor of the sun position can real-time monitor the sun position, and thetracing accuracy meets the requirement of concentrated power generation system andcontrol system meets practical application of solar thermal power generation.