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.
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.
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.
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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As to the concrete topology of three-phase LCL type grid-connected inverter with damping resistance, mathematical model was deduced in detail, using method of equivalent …
The dual-loop control strategy for grid-connected in-verter with LCL filter in this paper can be used to control the currents of three phase grid-connected inverter, and it will let …
In this article, a novel control method of the grid-connected inverter (GCI) based on the off-policy integral reinforcement learning (IRL) method is presented to solve two-stage …
As to the concrete topology of three-phase LCL type grid-connected inverter with damping resistance, mathematical model was deduced in detail, using method of equivalent …
As to the concrete topology of three-phase LCL type grid-connected inverter with damping resistance, mathematical model was …
In the recent development of microgrids, grid-tied inverters and their control techniques have played a vital role in the power injections from the renewables into the grid. …
A. Grid Integration Modelling When considering stability, traditional methods are insuffi- cient. Fig.1illustrates the system’s primary circuit, which in- cludes coordinate …
This study focuses on analyzing the parameters of the LCL filter circuit and estab-lishing a mathematical format of the triple-phase grid-tied inverter in the dq spinning frame of …
This article presents a comprehensive parameter design method of active power control (APC) and voltage and current control (VCC) for a grid-forming (GFM) inverter. By …
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 …
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 …
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