Method for controlling single-phase non-isolated photovoltaic inverter with follow current clamping switch
A photovoltaic inverter and control method technology, applied in the control of single-phase non-isolated photovoltaic inverters and photovoltaic power generation fields, can solve the problem of affecting the current quality of the inverter, endangering personal and equipment safety, and increasing the electromagnetic interference of the system. and other problems, to achieve significant practical application and engineering application value, improve conversion efficiency, and improve the effect of common model characteristics.
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[0047] Specifically, as an exemplary implementation, it is implemented in the following manner:
[0048] 1) Make the aforementioned first switching tube S 1 The gate-source control waveform of v gs1 and the fourth switching tube S 4 The gate-source control waveform of v gs4 same, and the aforementioned two gate-source control waveforms v gs1 , v gs4 In the positive half cycle of the inverter output current is the SPWM waveform, and the negative half cycle of the inverter output current is zero;
[0049] 2) Make the second switching tube S 2 The gate-source control waveform of v gs2 and the third switching tube S 3 The gate-source control waveform of v gs3 same, and the aforementioned two gate-source control waveforms v gs2 , v gs3 The positive half cycle of the inverter output current is zero, and the negative half cycle of the inverter output current is an SPWM waveform; and
[0050] 3) Make the fifth switching tube S 5 The gate-source control wavefor...
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