Modeling method of mathematical model for silicon solar cell engineering

Abstract

The invention relates to a modeling method of a mathematical model for silicon solar cell engineering, which is used for modeling according to the characteristic of large similarity of an I-V characteristic curve of a silicon solar cell and a particle-throwing motion locus curve. In the coordinate system of the particle-throwing motion locus curve, the coordinate system is divided into different gravitational fields by two demarcation points at a maximum-power point voltage position and a voltage position lower than the maximum power point, and then deducing and modeling are carried out according to the principle of kinematics. The invention not only can still meet the requirement of engineering precision well; through adjusting the position of the demarcation point in the voltage position lower than the maximum power point, the model of the invention can be close to actual measurement data in a zone nearby the maximum-power point voltage position well so as to be beneficial to the realization of a maximum power tracking algorithm; and the invention can also greatly improve the response speed of control units in controllers along with the changes of external environments comprising illumination, temperature and the like. When the model is calculated and controlled by adopting controllers comprising a single-chip machine or a DSP (Digital Signal Processor) and the like in engineering practice, the operating time of the model is greatly shortened.

Description

technical field [0001] The invention relates to a mathematical model of a silicon solar cell, in particular to a mathematical model of a silicon solar cell suitable for engineering applications. Background technique [0002] Photovoltaic system has good application and development prospects as a clean energy source. As the core component of photovoltaic system, solar cells have attracted more attention from scholars at home and abroad. Since the output voltage and current of solar cells have strong nonlinearity with the change of sunlight intensity and solar cell temperature, in order to obtain the input and output characteristics of solar cells that are easy to study, people have established corresponding mathematical models. The scientific theory includes single exponential model and double exponential model. The accuracy of the single-exponential model or double-exponential model is relatively high, but the parameters used in the model are difficult to measure and determ...

AI Technical Summary

Problems solved by technology

In engineering practice, controllers such as single-chip or DSP are often used to calculate and control the input and output characteristics of solar cells, and the exponential and logarithmic operations in these controllers will greatly prolong the calculation time, thereby affecting these controls. The response speed of the control unit in the device to changes in the external environment such as light and temperature

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