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PR controller in stationary frame which is equivalent to PI controller in synchronous frame has been widely used in the application of PV inverters. While little attention has been devoted to VR(vector-resonant) controller in the application of PV inverters. VR controller in stationary frame is equivalent to VPI(vector PI) controller in synchronous frame, which takes decoupling into consideration...
The conventional grid-connected photovoltaic (PV) inverter is controlled by a dual-loop control strategy in synchronous reference frame, and the controllers are designed for steady-state operating point based on the small signal model by neglecting the high-order and coupling terms. However, in an LCL filter, the coupling terms are complicated due to the dq transformation which will affect the dynamic...
Multi-level technology has good application prospects in high-voltage high-power occasions. Compared to sinusoidal PWM (SPWM), space vector PWM (SVPWM) has many advantages. However, conventional SVPWM will be too complex when level number is larger than five. In this paper, A new multi-level SVPWM method is proposed for cascaded H-bridge converters. This method implements multi-level SVPWM by cyclically...
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