Is the wind energy into mechanical power of the power machinery, also known as windmills. Broadly speaking, it is a kind of solar heat source, the atmosphere as the working medium of the heat using the engine. Wind power is the use of natural energy. Relative to diesel power is much better. But if the emergency to use, or less than diesel generators. Wind power can not be regarded as a backup power supply, but it can be used for a long time.
Water generators are the kinetic machinery that converts the kinetic energy of water and the potential energy of gravity into mechanical work. China's Three Gorges is a good example. In the power of this one is best to nuclear power generation, but relatively large nuclear pollution. So China is now widely used or coal power generation. At present, China's coal resources are tight, coal prices have been rising, which is why there will be the main reason for the emergence of electricity shortage.