Inverter dual-loop control grid connection

4 FAQs about [Inverter dual-loop control grid connection]

Is there a dual closed-loop repetitive control strategy for single-phase grid-connected inverters?

In this paper, a novel dual closed-loop repetitive control strategy based on grid current feedback is proposed for single-phase grid-connected inverters with LCL filters. The proportional-integral inner loop is stabilized by using an inherent one-beat delay achieved by digital controller.

What is the control design of a grid connected inverter?

The control design of this type of inverter may be challenging as several algorithms are required to run the inverter. This reference design uses the C2000 microcontroller (MCU) family of devices to implement control of a grid connected inverter with output current control.

What is the circuit topology of a single-phase grid-connected inverter?

The main circuit topology is a single-phase grid-connected inverter with LCL filter. The repetitive dual-loop control method is adopted. The outer loop is controlled by the RC, which makes the grid-connected current ig track the sinusoidal reference iref without a steady-state error.

How to measure a grid-connected inverter?

The most important indexes for measuring the grid-connected inverter are total harmonic distortion (THD) of the grid current and the grid power factor (PF) [5, 6]. In order to reduce the switching ripples and obtain a low grid-current THD, L filters and LCL filters are mainly used as grid-connected inverters.

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