A Five-Level Converter in a Three-Level Mode for Common-Mode Leakage Current Suppression in PV-Generation Systems

Power generation systems (PGSs) based on renewable energy sources are finding ever-widening applications, and many researchers work this problem. Many papers address the problem of transformerless PGSs, but few them aimed at conducting research structures with multilevel converter topologies as part a PGS. In paper grid-tied PV-generation system is discussed. There common-mode leakage currents (CMLCs), which act parasitic factor. It also known that voltage main cause current in systems. This considers space vector pulse-width modulation (PWM) technique, used to suppress or reduce current. The proposed PWM technique reduction for controlled was verified experimentally. experimental results accurately confirmed mathematical model compensation achieved without errors. experiment, there an approximately six-fold decrease (10.3 mA rejection mode 61 non-rejection current). can lead elimination CMLC semiconductor only by changing mode. suggests possibility using these devices Suppression be carried out algorithm. Both considered implement operation. has higher efficiency up frequency multiplicity 2000.