Study On The Strategy Of Sine-Wave Modulation In Active Inverter

The technology of invert has gone through rapid advancement during the past decades, and recently its applications are expanding in grid-feed solar system, whose impact is inevitable.The paper comes from an experiment for an active-inverter proposed as an interface between a solar module and singe-phase power grid. Our ultimate target is to make the active-inverter operate rightly and make output current as close to sine wave as possible.We discussed with three modes for controlling current in three topologies with the help of mathematic calculations in MATLAB. Those modes are Peak-Mode, Hysteresis-Mode and Timing-Mode. Those circuits are Full-Bridge, Half-Bridge and Push-Pull topologies.The situation of electrical components such as inductor capacitor in old circuit has also been reconsidered.Finally, the paper presents a consideration for main circuit of active-inverter.What we have done in the past is just a beginning, to make our dreams become true, a lot of work should be done in the coming days.