The ultimate goal of smart grid is digitalization, automation, interaction and informatization. If we want to establish smart grid, we must depend on advanced power electronics technology . With the development of the society and the progre ss of era, the development of economy and science and technology are also very rapid . T herefore, the demand for energy is growing, and the average power grid is aging fast . That leads to the high accident rate and based on the reasons above , in order to me et the needs of times development, our country must use the advanced smart grid, on the basis of the advanced sensing measurement and communication technology . T he advanced power electronics technology is the key to smart grid construction . The constructio n of smart grid really plays an important role in society .