Research on the Smooth Output of Renewable Energy

Abstract Nowadays, every country focuses on the smart grid because of the energy deficit. The decrease of the traditional energy caused a lot of problems. The only way to solve them is to find some new fashion energy to fulfill the consumption. So the only thing which can take the place of fossil fuel is renewable energy. There are three kinds of renewable energy which are hot in researching: wind power, photovoltaic power, and tidal power. But all of them are intermittent energy, if we settle the voltage, the power outputs would be hard to forecast and control. This caused a lot of problem for example: the quality of the power and harmonic problems. So we have to find a way to put the intermittent power into order so that it will no longer do harm to the main electric grid.