Photovoltaic panel power generation is to directly convert light energy into DC power through the characteristics of semiconductors, and then convert DC power into AC power that can be used by us through an inverter. The photovoltaic system is composed of photovoltaic modules, brackets, DC cables, inverters, AC cables, power distribution cabinets, transformers, etc. The brackets are not charged, so naturally no electromagnetic radiation will be generated. Photovoltaic modules and DC cables contain DC current, and the direction does not change. They can only generate electric fields, but not magnetic fields.
Although the output transformer is AC, the frequency is very low, only 50Hz, and the magnetic field generated is very low. The inverter is a device that converts direct current into alternating current. It contains power electronic conversion, and the frequency is generally 5 to 20KHz, so it will generate an alternating electric field, so it will also generate electromagnetic radiation. The country has strict standards for the electromagnetic compatibility of photovoltaic inverters. Compared with household appliances, the electromagnetic radiation of photovoltaic inverters is about the same as that of laptop computers, and lower than that of induction cookers, hair dryers, and refrigerators. Therefore, the construction of photovoltaic panel power stations will not only cause no harm to human health, but can also provide green, clean and high-quality energy for the earth, which is the future energy development direction of mankind.
The photovoltaic manufacturing industry mainly includes four links: crystalline silicon purification, silicon ingots and wafers, photovoltaic cells and photovoltaic modules. Among them, the purification of crystalline silicon needs to be completed under high temperature conditions, which consumes a lot of electric energy, accounting for about 56% to 72% of the total energy consumption, and is the most important chemical production process in the industrial chain; and "high pollution" comes from high-purity polysilicon by-products of production. It complies with the photovoltaic power consumption stipulated by the state. According to relevant statistics, the production of one watt of photovoltaic modules requires 0.6 to 1.2 kilowatt-hours of electricity. Based on the 25-year life of photovoltaic panel components, photovoltaic power generation is far greater than production power consumption.
Light pollution is threatening people's health. In daily life, people often see light pollution as the dizziness of pedestrians and drivers caused by the reflection of mirrored buildings, and the discomfort caused by unreasonable lights at night. So everyone is very worried about whether there will be light pollution when installing photovoltaic modules. In fact, the visible light reflection coefficient of ordinary toughened glass is 9% to 11%, which will not cause light pollution. Photovoltaic modules use the same type of glass as the building, and will not cause light pollution.
The source of light pollution is visible light. The internal power generation unit cells of photovoltaic panel components will absorb visible light and convert it into electrical energy, which will further reduce the reflection of visible light. And with technological innovation, many photovoltaic building materials can now be made into frosted surfaces, which can reduce the reflection of visible light.
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