Stand-alone Pv Power Generation Automatic Tracking System

With constently exhaustion of conventional resources,by and by the energy structure which is based on conventional enerey would fail to catch up with the needs of the sustainable development. So accelerating the research and utilization of renewable resources that solar energy is principle part has been our common ideas. Photovoltaic generation system can directly change the light energy of the sun into the premium energy —Electric energy. But the high cost of its installation has become the bottleneck preventing solar energy from being broadly used.To answer the question,based on the working features of the solar battery, this subject designed the automatic tracking system for the Photovoltaic generation system.And the main content is as follows1. introducing the current situation of domestic and international Photovoltaic generation system and development prospect at present, the main structure of and the characteristic to solar cell and The types of system does the simple introduction, content that clear subjects should be studied.2. It is a core that only bends over the electricity generation system to only bend over the battery singly, it is determining the fabrication cost of the systematic device to a great extent.So for being on the existing basis most heavy it bend over potentiality of solar cell to give play to, this text utilizes the respect to study the basic power generating principle that only bends over the output characteristic of solar cell, key research bend over output characteristic and their of cell influence reason , it is bend over odd kinds of feasible ways , solar cell of efficiency only to improve to put forward only.3. Efficiency of solar cell is increasing with the sun luminous intensity, so in this paper used CPC solar collector to strengthen solar radiation with . CPC solar collector does not need track sunlight in from east to west, only require that follows the sun in the north and south , those reduced the complexity of the tracking system greatly . The actual efficiency of solar cell can rise to 30% from 10%4. The orientation of sunshine changes continually because of the rotation of the earth. This paper adopts automatic tracking technique by which the drive system comprising of singlechip ADμC812, motor drive circuit UC3717 and walking electromotor makes the solar collector track the orientation of sunshine. At night, the system can make the solar collector orient east too. The singlechip determines control the walking electromotor by judging the information from three photo resistances in order to make walking electromotor run or stop. The singlechip can produce a lock wave to prevent the walking electromotor deflection while stopping.5. The output of solar cell is non-linear, which has MPPT problem. This paper has studied MPPT method, and proposed improved measures. The circuit of converter is new soft switch technique: zero-voltage-transition (ZVT), which enhances the efficient and dynamic property of the system. The circuit is experimented by the emulator PSIM at last.6. The acid-lead battery is an important part of the Photovoltaic generation system too. The battery work property and problem in the system are studied. The solve measures is also brought forth. To make the acid-lead battery match the PV system, dynamic power track match technique is introduced.