太阳能光伏特性最大功率点翻译.doc

0. INTRODUCTIONS The research?on?the?solar?battery?photovoltaic?output characteristics has?an important significance in some aspects, such as in – depth exploration?of?photovoltaic?power generation mechanism and the development?of?the?application?of?solar?energy?technology. Analyzing the change of parameters ,such as diode ideal factors（A）、series resistor（Rs）and shunt resistance（Rp）,has an effect on the photovoltaic output characteristics ,and then research the change law of the photovoltaic output characteristics under any light intensity (light intensity) and environment temperature (environment temperature),which plays a guiding role for improving the utilization of solar energy methods and the development of a more efficient energy conversion device [1]. At present, the equivalent circuit which contains diode and the Series-parallel resistance is a more accurate photovoltaic output characteristic mechanism model. But, as the strong light and temperature changes, the A, Rs and Rp changes. The Model is a nonlinear function with the parameters changes. It is difficult to solve the model parameters and calculate the maximum power point directly. What’s more, most of the existing documentation methods are the use of standard test conditions data provided by manufacturer, through simplifying photovoltaic characteristics equation approximately, only can solve model parameters under standard test conditions simultaneously, can’t be extended to arbitrary light intensity and temperature conditions [2-3]. Through analyzing A, Rs, Rp parameters which affect photovoltaic output characteristics law, this paper gives a method based on parabola extreme point to solve out maximum power point directly . Then, using maximum power point calculation process data, we build photovoltaic characteristics model parameters to solve out equation, obtain photovoltaic characteristic curve under arbitrary light intensity and temperature. Finally, aiming at the four types of solar batteries, w