1000w -6000w Solar Power Inverter

FSI series :pure sine wave hybrid solar power inverter with AC charger

          When the inverter operates in the off-grid mode, a double-loop control structure of the inner loop of the inductor current and the outer loop of the output voltage is adopted. The output voltage and the load current are fed forward to realize the decoupling of the output voltage and the inductor current. In order to eliminate the influence of non-linear loads such as rectification on the output voltage waveform, the inner loop of the inductor current adopts proportional control, and the outer loop of the output voltage adopts a parallel structure of a proportional controller and an odd harmonic repetitive controller, and the frequency of the repetitive controller is controlled. 

          Adaptation was studied. The output voltage of the load current of the inverter is disturbed, and the outer loop of the output voltage adopts the composite control structure of proportional control and odd harmonic repetitive control in parallel, and the frequency adaptability of the repetitive controller is studied. In order to reduce the number of sensors required for inverter waveform control, a control method based on state observer is proposed. Only by measuring the output voltage of the inverter, the inductor current and load current of the inverter can be estimated for the inverter. Transformer control.

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