輻射是指物體以波或粒子的形式向周圍空間發(fā)射能量的過(guò)程。自然界中的一切物體只要其溫度在絕對(duì)零度以上，都會(huì)以電磁波或粒子的形式不停地向外界傳送能量，換句話說(shuō)，世間萬(wàn)物都有輻射，包括人體自身。

但是，并非所有的輻射都是有害的，有些甚至是我們離不開(kāi)的，比如太陽(yáng)的輻射——陽(yáng)光，大地萬(wàn)物的生長(zhǎng)都需要陽(yáng)光。

是不是所有的輻射都對(duì)人體產(chǎn)生危害呢？其實(shí)不然，我們常把輻射分為兩大類：電離輻射和非電離輻射。

電離輻射是一種高能量輻射，會(huì)破壞生理組織，對(duì)人體造成傷害，但這種傷害一般是具有累積效應(yīng)的，核輻射、X光就屬于屬于典型的電離輻射。

非電離輻射遠(yuǎn)沒(méi)達(dá)到將分子分解的能量，主要以熱效應(yīng)的形式作用于被照射物體。無(wú)線電波產(chǎn)生的電磁輻射照射結(jié)果一般只有熱效應(yīng)，不會(huì)傷及生物體的分子鍵。而我們一般所說(shuō)的電磁輻射，就屬于非電離輻射。

光伏發(fā)電是將光能通過(guò)半導(dǎo)體的特性直接轉(zhuǎn)化為直流電能的，再通過(guò)逆變器將直流電轉(zhuǎn)換成可以被我們使用的交流電。

光伏系統(tǒng)是由光伏組件，支架，直流電纜，逆變器，交流電纜，配電柜，變壓器等組成，其中支架不帶電，自然不會(huì)產(chǎn)生電磁輻射。光伏組件和直流電纜，里面是直流電流，方向沒(méi)有變化，只能產(chǎn)生電場(chǎng)，不能產(chǎn)生磁場(chǎng)。

輸出變壓器雖然是交流電，但頻率很低，只有50Hz，產(chǎn)生的磁場(chǎng)很低。逆變器是把直流電轉(zhuǎn)為交流電的設(shè)備，里面有電力電子變換，頻率一般為5-20KHz，因此會(huì)產(chǎn)生交變電場(chǎng)，所以也會(huì)產(chǎn)生電磁輻射。國(guó)家對(duì)光伏逆變器電磁兼容性有嚴(yán)格的標(biāo)準(zhǔn)。

（各種家用電器和光伏組件的輻射對(duì)比）

光伏逆變器的電磁輻射，同家用電器相比，大約和筆記本電腦差不多，低于電磁爐，電吹風(fēng)，冰箱。

因此，建設(shè)光伏電站不僅不會(huì)對(duì)人的健康產(chǎn)生危害，還可以為地球提供綠色清潔的優(yōu)質(zhì)能源，是人類未來(lái)能源發(fā)展方向。

如果光伏電站有輻射，人也不能站在電站下面呢，您說(shuō)是不是??？

Radiation is the process by which an object emits energy into the surrounding space in the form of waves or particles.  Everything in nature, as long as its temperature is above absolute zero, continuously transmits energy to the outside world in the form of electromagnetic waves or particles. In other words, everything in the world radiates, including the human body.  

But not all radiation is harmful. Some are indispensable, such as the sun's radiation -- sunlight, which everything on earth needs to grow.  

The picture  

Radiation hazards  

Is all radiation harmful to the human body?  In fact, we often divide radiation into two broad categories: ionizing and non-ionizing.  

Ionizing radiation is a kind of high energy radiation, which can destroy physiological tissue and cause harm to human body. However, such harm generally has cumulative effect. Nuclear radiation and X-ray are typical ionizing radiation.  

Far from reaching the energy required to break molecules apart, non-ionizing radiation mainly acts on irradiated objects in the form of thermal effects.  The electromagnetic radiation produced by radio waves usually produces only thermal effects and does not damage the molecular bonds of the organism.   What we generally call electromagnetic radiation is non-ionizing radiation.  

Cell radiation in a photovoltaic system  

Photovoltaic power generation converts light energy directly into direct current electricity through the characteristics of semiconductors, and then converts the direct current electricity into alternating current electricity 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 and so on. The brackets are not charged and will not naturally produce electromagnetic radiation.   Photovoltaic modules and DC cables, which contain DC current in the same direction, can only generate electric fields, not magnetic fields.  

The output transformer, although ac, has a very low frequency, only 50Hz, which generates a very low magnetic field.  Inverter is a device that converts direct current into alternating current. There is power electron transformation in it. The frequency is generally 5-20khz, so alternating electric field will be generated, so electromagnetic radiation will also be generated.   China has strict standards for electromagnetic compatibility of photovoltaic inverters.  

The picture  

(Radiation comparison of various household appliances and PHOTOVOLTAIC modules)  

The electromagnetic radiation of photovoltaic inverters, compared with household appliances, is about the same as that of laptops, and lower than that of induction cookers, hair dryers, and refrigerators.  

Therefore, the construction of photovoltaic power stations will not harm human health, but also provide green and clean high-quality energy for the earth, which is the future direction of human energy development.  

If the photovoltaic power station has radiation, people can not stand under the power station, do you agree?