Distribution system compensation using a new binary multilevelvoltage source inverter

A new binary multilevel voltage source inverter with separate DC sources is proposed. This n-level voltage source inverter produces a (2 ⁿ⁺¹-1)-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 a PSCAD/EMTDC program. The proposed inverter configuration not only reduces the system complexity and its size, but also improves the harmonic profile significantly