Distribution system compensation using a new binary multilevel voltage source inverter

A new binary multilevel voltage source inverter with separate dc sources is proposed. This nilevel voltage source inverter produces a (2n+ʹ - 1)-steps ac voltage output with n full bridge inverters connected in series. The use of selective harmonic elimination modulation technique to either completely eliminate or minimize harmonics is studied. A closed-loop controller to control the capacitor voltages and adjust the inverter reactive power output is developed. Application of such a compensator for dynamic compensation of 13.8 kV distribution system is examined through transient studies using PSCAD/EMTDC program. The proposed inverter configuration not only reduces the system complexity and its size, but also improves the harmonic profile significantly.