Research On Control Method For Three-phase Four Wire Three-level PV Grid-connected Inverte

Solar energy is in today’s world has the development and the one of greenenvironmental protection energy, and development and use of solar energy to have theimportant meaning. Recent years, with three level inverter technology development andapplication, this makes the voltage type inverter large capacity to turn, thehigh-performance possible, research and development of the three-level inverter,whether in technology and in practical application there is of great significance.This paper studied in full in recent years three-level inverter development areas onthe basis of the important achievements, proposed a new photovoltaic inverter system,and gives the detail. The paper firstly introduces the background of the development ofthe domestic and international research and its significance; Secondly, this paperintroduces the DuoZhong three level algorithm, and presents a new algorithm; Finally,through the simulation results that the new algorithm is feasible.