Predictive current controller and compensator‑based discrete current controller for single‑phase bridge inverters

Jinghua Zhou; Shuang Xu; Riming Shao; Liuchen Chang

Predictive current controller and compensator‑based discrete current controller for single‑phase bridge inverters

Vol. 22, No. 9, pp. 1427-1437, Sep. 2022

10.1007/s43236-022-00444-8

Compensator

Current controller

Distributed generation systems

Predictive current controller

Single-phase inverter

Abstract

Transfer efficiency and power quality are two critical factors when it comes to grid-connected distributed generation systems. Single-phase inverters are commonly used in distributed generation systems under 10 kilowatts as the connection between the gird and renewable energy sources (RESs). In this application, grid current distortion plays a pivotal role in determining inverter performance. In this article, an improved current control strategy based on a predictive current controller (PCC) and a compensator is presented to decrease current harmonic distortion and increase power quality. The controller design method inspects a single-phase inverter system as a digital platform, and designs the controller in discrete time in order to obtain a more precise and effective controller than that in continuous time. The discretization procedures using sampling and hold (S&H) are taken into consideration in the design process. The improved current controller is a DSP-based digital current controller for grid-connected single-phase bridge inverters, whose performance is optimized by considering the time delay caused by analog–digital conversion (ADC) and computations. A comparison has been made to analyze the performance of the single-phase grid-connected inverter system with PCC and ICC. Experimental results are shown to validate the effectiveness of the designed current controller.

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Cite this article

[IEEE Style]

J. Zhou, S. Xu, R. Shao, L. Chang, "Predictive current controller and compensator‑based discrete current controller for single‑phase bridge inverters," Journal of Power Electronics, vol. 22, no. 9, pp. 1427-1437, 2022. DOI: 10.1007/s43236-022-00444-8.

[ACM Style]

Jinghua Zhou, Shuang Xu, Riming Shao, and Liuchen Chang. 2022. Predictive current controller and compensator‑based discrete current controller for single‑phase bridge inverters. Journal of Power Electronics, 22, 9, (2022), 1427-1437. DOI: 10.1007/s43236-022-00444-8.