Integration control strategy research for dual-PW M inverter based on virtual-flux

Abstract：According to drawbacks of the traditional AC-DC-AC inverters, the operation principles and the running characteristics of dual-PWM inverter are presented.In order to improve voltage stability of DC bus and the system reliability, the integrated direct power control strategy with power feedback is proposed.The virtual-flux based direct power control schemes are introduced into the dual-PWM inverter, which to improve the dynamic response speed and anti-jamming ability.In compared with voltage oriented control, the proposed system reduces the number of sensor and system cost, which virtual-flux power estimator can accurately estimate the power.The simulation results verify the validity of the proposed schemes.

Keyword：dual-PWM inverter;virtual-flux;direct power control;integration control;