Method for measuring temperature of photovoltaic module
A photovoltaic module and photovoltaic technology, which is applied in the monitoring of photovoltaic systems, photovoltaic modules, photovoltaic power generation, etc., can solve the problems of increased short-circuit current, reduced open-circuit voltage of components, and reduced band gap of silicon materials, etc., to achieve cost-saving effects
Pending Publication Date: 2022-02-01
HARBIN UNIV OF SCI & TECH
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[0003] Generally speaking, the most important factor affecting the output power of photovoltaic power plants is solar radiation, followed by temperature, which mainly affects the temperature of photovoltaic modules, which indirectly affects the power generation of photovoltaic power plants, and the battery power and components The temperature is basically inversely proportional. This is because the increase in temperature will reduce the band gap of the silicon material, thereby affecting the characterization of most performance parameters of the material, thereby affecting the electrical performance parameters of the component, which will lead to a decrease in the open circuit voltage of the component, short circuit current will increase slightly, and overall will reduce power
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[0018] The implementation of the present invention is described through the following specific steps. The present invention can also be implemented or applied through other different specific implementations. The details in this specification can also be based on different viewpoints and applications without departing from the spirit of the present invention. Various modifications or changes are made below.
[0019] Step one, clean the front surface of the PV module to remove any dust particles; apply thermal compound to each NTC sensor and place it on the back of the PV module using blue light marking adhesive; In an area with minimal shading or sun shading; place the PV module at the desired tilt angle and expose it to sunlight for 10 minutes. figure 1 The thermistors shown in are placed evenly spaced from each other and are labeled T1 to T9 for data recording;
[0020] Step 2, the collected data is interpolated by the microprocessor, and the process is as follows figure ...
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Abstract
The invention provides a method for measuring the temperature of a photovoltaic module unit by using a limited number of temperature sensors and utilizing a linear interpolation technology, and analyzing and predicting by combining a fuzzy temperature difference threshold value method. A measuring system of a given example consists of nine temperature sensors based on negative temperature coefficient thermistors, and the nine temperature sensors are arranged at equal intervals of 3: 3. According to the invention, the cost can be reduced, the temperature at the next moment can be predicted during measurement, and the method can be used for temperature detection and early warning of the photovoltaic module.
Description
technical field [0001] The invention relates to the field of photovoltaics, and in particular to a method for measuring the temperature of a photovoltaic module. Background technique [0002] Solar energy is one of the important renewable energy sources, and its development and improvement of power generation efficiency are particularly important for energy security and industrial production. The operating temperature of the photovoltaic panel has a great influence on the power of the device and the life of the battery: on the one hand, when the temperature exceeds a given range, it will cause short-term damage to the battery (low working efficiency) and long-term damage (irreversible damage) ; On the other hand, knowing the temperature of the panel can better grasp whether the power generated by each panel meets the expected power. Therefore, the temperature detection of photovoltaic modules is of great significance to ensure the stable and efficient operation of photovolt...
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Login to View More IPC IPC(8): G01K7/22H02S50/10
CPCG01K7/22H02S50/10Y02E10/50
Inventor 钟晨吕艳玲
Owner HARBIN UNIV OF SCI & TECH