Design of a Control System for Dual-buck Inverters Used in Grid-connection Applications

In order to connect DC distributed energy resources to the main grid, an inverter is used. In this paper, the dual-buck inverter is used for grid connection of PV cells.Instead of IGBTs, the MOSFETs are used in this topology. Therefore, the switching frequency can be increased and as aresult, the filter size is reduced. This type of inverter doesn’tneed any dead time and hence, the short-through which is a major problem in typical voltage source inverters, is avoidedand as a result, the system reliability is increased. The efficiency of this converter is higher than that of other IGBTbasedconverters due to less power loss of MOSFETs. The discrete vector space switching method is used as the switching scheme of this inverter

Keywords:

dual-buck inverter , distributed energy resources , discrete vector space switching