Tag Archives: Influence of closed-loop control on capacitor voltage balance

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DC side control technology of photovoltaic grid-connected inverter
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Specific analysis of the influence of closed-loop control on the modulation wave

The following will take proportional-integral PI regulator, proportional-resonant PR regulator and quasi-resonant QR regulator as examples to analyze the influence of closed-loop control on the modulation wave. (1) Gc(s) is the PI regulator, Gc(j0)→∞ Among them, kp>0, ki>0. The PI regulator controls the AC signal to have a static error, so the current error ie(t)=Ie·sin(ωst+θi)-Io(avg). At […]

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DC side control technology of photovoltaic grid-connected inverter,
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Overview of the influence of closed-loop control on capacitor voltage balance

Previously, we analyzed the self-balancing characteristics of the 3L-NPC topology from the perspective of time domain and frequency domain under open-loop operation, that is, the modulated wave is symmetrical. In practical applications, the inverter must adopt closed-loop control to control the load current io or the load voltage uo. And in order to improve the stability […]

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