Analysis of Z-source inverter control system for asynchronous drive for gas compressor

The article deals with the comparison of Z-source inverter based control systems for the asynchronous drive of gas compressor that is used in oil and gas industry. The relevance of the task is highlighted by the fact that choice of control system determines the reliability and the efficiency of gas system drive. Two types of indirect DC-link voltage control techniques were examined in order to estimate operation effectiveness of control system in dynamic modes. For that purpose simulation model of ZSI fed by induction motor, based on state space averaged modeling method, has been developed utilizing MATLAB/Simulink environment. The simulation results of dynamic performance of the ZSI with single-loop and dual-loop capacitor voltage control techniques during input voltage changes and steady state operations are presented and analyzed.