我国的《可再生能源法》说明了可再生能源包括太阳能、风能、生物质能、地热能和海洋能等。实际上,可再生能源有两个来源,一个来自天上的太阳,太阳能、风能、生物质能和海洋能都源于太阳活动;另一个来自地球,地热能是来自地球深部不断向外散发的热。来自太阳的能量都受昼夜、气象等条件影响而变化,它们发出的电力需要“智能电网”来弥补其 Our country’s Renewable Energy Law explains that renewable energy includes solar energy, wind energy, biomass energy, geothermal energy and ocean energy. In fact, there are two sources of renewable energy, one from the sun, solar energy, wind energy, biomass energy and ocean energy all come from the solar activity; the other from the earth, geothermal energy is continuously from the Earth’s deep outward heat . The energy from the sun is affected by the conditions of day and night, meteorology and other changes, the power they issue needs “smart grid” to make up for it