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能源是我们生活的物质基础。没有能源就谈不上技术、文化,谈不上社会的发展。根据物理学定律,能量不会无中生有,也不会消失,只会改变其存在形式.在任何情况下,在使用能量的过程中都会损耗其中的一部份。电能的特点是高度集中,可以远距离传输,并且在传输过程中的损耗较小。电能实际上不污染环境。各国按人口平均消耗的电能数量是社会生活水平的重要指标。在通用性和方便使用方面,也没有任何能源形式能与电能相媲美。电能是二次能源。人们常把一次能源,例如,石油、天然气、煤等矿物燃料;或核能、水力、风
Energy is the material basis of our lives. Without energy, we can’t talk about technology and culture, and we can’t talk about social development. According to the laws of physics, energy will not come out of nothing, it will not disappear, it will only change its form of existence. In any case, in the process of using energy will lose some of them. Electrical energy is characterized by high concentration, long-distance transmission, and low loss during transmission. Electrical energy does not actually pollute the environment. The average amount of electricity consumed by countries according to the population is an important indicator of social living standards. In terms of versatility and ease of use, there is no comparable form of energy to electrical energy. Electricity is a secondary energy source. People often use primary energy sources, such as fossil fuels such as oil, natural gas, and coal; or nuclear power, hydraulic power, and wind power.