Open circuit voltage (Voc): open circuit voltage
Under certain voltage, temperature and irradiation conditions, the short voltage of the photovoltaic generator under no-load conditions (open circuit) .
Short circuit current (Isc): short circuit current
Under certain temperature and irradiation conditions, the output current of the photovoltaic generator when the terminal voltage is zero.
The electrical characteristics of solar cells mainly refer to the current-voltage characteristics, also known as I-V curves
Measuring the basic characteristics of solar cells
< p>The following are the parameters,■Can simulate the output characteristics of solar panels (I-V P-V curve);
■Can store 1,000 I-V curves under different lighting and temperatures, each with 128 points. the distribution is intelligent (dense near the point ofmaximum and sparse power on both sides),
■It has a constant power mode, and the voltage, current and maximum power can be adjusted independently;
■It has of a constant resistance mode, the internal resistance can be adjusted;
■ Accurate measurement of voltage and current saves you additional measuring instruments;
■ High voltage stabilization accuracy and low ripple voltage;
■ Can quickly store 9 groups of data, each group can memorize voltage values, current values and power values, which can be recalled quickly and easily;
■ With the functions of overvoltage, overcurrent, temperature and short circuit protection; the overvoltage protection limit and overcurrent protection limit can be arbitrarily set between 0 and 110% of the rated voltagenal and between 0 and 110% of rated current.
■Voltage, current and time setting, digital key input, high precision;
■ This machine can make 30 sets of different settings of voltage, current and power value at the same time. , And can perform 999999 consecutive cycle tests;
■With RS232C communication interface (RS485, GPIB are optional), the command execution time is less than 10ms.
■ Simulate the I-V curve
■ Simulate the I-V curve in each time period to better test the dynamic MPPT function of the photovoltaic inverter.
Solar photovoltaic power generation plays an important role in future energy supply and social development. Rational use of solar energy, clean and green energy, is one of the effective ways to solve the energy crisis and environmental pollution. Solar cells arePhotovoltaics The essential components of electricity generation systems, research and efficient use of solar cells are key issues in the development of new energy sources in the 21st century. In order to meet the challenges of new energy technologies, it is essential for contemporary students to understand and master some basic characteristics and methods of solar cells. The Experiment for Measuring Basic Characteristics of Solar Cells is a general physics experiment comprehensively designed for science and engineering students. In experimental teaching, the traditional method of processing experimental data in this experiment mainly uses the manual drawing method on graph paper, drawing curves by hand. and working together, find the extension line of the battery curve.The characteristic parameters are impowerful for data fitting, and the error at each step will be large and time-consuming. Origin is currently recognized as the fastest, most flexible and easiest to use technical drawing software. This item uses the powerful drawing analysis function of Origin software to draw beautiful graphs, clearly display solar characteristic data, and perform data fitting on the battery I-V curve, so as to quickly and easily obtain the parameters basic of the solar cell.
This article tests the output characteristics of solar panels and uses Origin to plot and process the experimental data. According to the I-V curve of the battery, the characteristic parameters of the battery are obtained. The results show that using Origin software for processing and adjusting experimental data not only presents a simple operational process, buts also precise and aesthetic drawings and detailed settings. It avoids errors caused by subjective factors in the manual drawing process and can process experimental data. conveniently, quickly and accurately, it has greatly improved students' interest in carrying out physical experiments and their ability to learn on their own.