Comparison of SVPWM and HCC control techniques in grid connected three phase inverters

In this study, steady state response, dynamic response, and power quality performance are comparatively analyzed for SVPWM (Space Vector Pulse Width Modulation) and HCC (Hysteresis Current Control) control techniques in three phase voltage source grid connected inverters. Mathematical model of the system is given and analysis of the system is realized with MATLAB/Simulink program. In the simulations, inverter power is selected 10kW and L filter is connected between inverter and grid. Current harmonic content (THDI) curves are obtained depending on inverter operating frequency, inductance value and hysteresis bandwidth. It is possible to choose switching frequency and inductance value in SVPWM and HCC using analysis results. It is observed that HCC technique has lower THDI value if SVPWM switching frequency and HCC average switching frequency are equal. It is concluded that the use of SVPWM technique is more appropriate than HCC, when maximum switching frequency of HCC is restricted to the SVPWM switching frequency.