Hybrid iterative learning control strategy for single-phase UPS inverter using inductor current active damping

The Journal of Engineering

Santosh Kumar Singh¹ 

[1] Department of Electrical Engineering , Indian Institute of Technology Roorkee , Roorkee – 247667 , India

关键词: discrete time frame;    fast transient recovery time;    stability analysis;    voltage sensor;    designed HIL control strategy;    digital signal processor;    system modelling;    filter magnitude-frequency characteristics shaping;    current sensor;    proportional integral;    UPS inverter control;    fast control techniques;    PI controller;    single-phase uninterruptible power supply inverters;    MATLAB environment;    control design;    steady-state dynamics;    hybrid iterative learning control strategy;    minimum steady-state error;    inductor current active damping technique;   

DOI  :  10.1049/joe.2017.0544

学科分类：工程和技术（综合）

来源: IET

【 摘 要 】

This study proposes a hybrid iterative learning (HIL) control scheme for single-phase uninterruptible power supply (UPS) inverters using inductor current active damping technique. A UPS inverter maintains a tightly regulated output voltage independent of loading conditions and disturbances. To achieve such performance, a fast transient recovery time with a minimum steady-state error is desired. Fast control techniques, such as proportional integral (PI), are not always known for good steady-state performance in single-phase applications. As the load voltage and current are periodic, therefore a hybrid control strategy has been proposed in which a PI controller is combined with an iterative learning controller to produce better transient and steady-state dynamics. Adoption of such a strategy enables the UPS inverter control to be realised with one voltage and one current sensor, respectively. System modelling, filter magnitude-frequency characteristics shaping and control design with stability analysis have been presented in this study. The designed HIL control strategy is examined through simulations in a MATLAB environment in the discrete time frame and experimentally verified for a single-phase UPS inverter system prototype using a Texas TMS320F2812 digital signal processor.

【 授权许可】

CC BY