what is radiation
Radiation is the process by which objects emit energy into surrounding space in the form of waves or particles. As long as the temperature of all objects in nature is above absolute zero, they will continuously transmit energy to the outside world in the form of electromagnetic waves or particles. In other words, everything in the world has radiation, including the human body itself.
However, not all radiation is harmful, and some are even inseparable from us, such as the radiation of the sun - sunlight, the growth of all things on the earth needs sunlight.
radiation hazards
Are all radiation harmful to the human body? In fact, we often divide radiation into two categories: ionizing radiation and non-ionizing radiation.
Ionizing radiation is a high-energy radiation that can damage physiological tissues and cause harm to the human body, but this damage generally has a cumulative effect. Nuclear radiation and X-rays are typical ionizing radiation.
Non-ionizing radiation is far from the energy to decompose molecules, and mainly acts on the irradiated object in the form of thermal effect. Electromagnetic radiation generated by radio waves generally has only a thermal effect and will not damage the molecular bonds of the organism. And what we generally call electromagnetic radiation is non-ionizing radiation.
Cell Radiation in Photovoltaic Systems
Photovoltaic power generation directly converts light energy into DC power through the characteristics of semiconductors, and then converts the 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 and naturally do not generate electromagnetic radiation. Photovoltaic modules and DC cables, which are DC current, the direction does not change, can only generate an electric field, not a magnetic field.
Although the output transformer is AC, the frequency is very low, only 50Hz, and the generated magnetic field is very low. The inverter is a device that converts direct current into alternating current. There is power electronic conversion in it. The frequency is generally 5-20KHz, so an alternating electric field will be generated, so electromagnetic radiation will also be generated. 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 notebook computers, and lower than that of induction cookers, hair dryers, and refrigerators.
Therefore, the construction of photovoltaic power plants not only will not cause harm to human health, but also can provide green and clean high-quality energy for the earth, which is the future energy development direction of mankind.