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An improved control strategy for the three-phase grid-connected inverter with space vector pulse-width modulation (SVPWM) is proposed. When the grid current contains harmonics, the d- and q-axis grid currents will be interacted, and then the waveform quality of the grid current will be poorer. As the reference output voltage cannot directly reflect the change of the reference grid current, the dynamic...
This paper presents a coupled inductor dual-buck full-bridge inverter (CI DBFBI) to solve the shoot-through problem of the conventional inverter and increase the input-voltage utilization rate of the dual-buck half-bridge inverter (DBHBI). Hysteresis current control is used in the CI DBFBI. All switches and diodes operate at each half line cycle, and the freewheeling current flows through the independent...
In recent years, space vector pulse-width modulation (SVPWM) technique obtains widespread application in AC modulation because of its high utilization of dc bus, fast dynamic response and easier digital realization. The paper focuses on the bi-dirction control methodology based on a 50 kW three-phase AC-DC PWM rectifier of high power factor. Active and reactive current are controlled respectively...
This paper proposed a control strategy for grid-interactive inverter operating in stand-alone and grid-connected modes. This control method has two outer loops and one inner loop. The principle of the control method and the design of the parameters are analyzed. Using this control strategy, seamless transfer can be achieved between the two modes, and the detailed process of the seamless transfer between...
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