A Hybrid Commutation Technique for Reducing Zero-Crossing Distortion in a Sliding Mode Controller for Single-Phase Grid-Tied Full-Bridge Inverters

被引:0
|
作者
Bolanos-Navarrete, Mario Andres [1 ]
Bastidas-Rodriguez, Juan David [1 ]
Osorio, Gustavo [1 ]
机构
[1] Univ Nacl Colombia, Fac Ingn & Arquitectura, Manizales 170003, Colombia
关键词
Full-Bridge; sliding mode control; zero crossing distortion; inverters; microinverter; grid-tie; unipolar; bipolar; HYSTERESIS CURRENT CONTROL; MODULATION;
D O I
10.3390/en17153671
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
This paper presents a single-phase Full-Bridge (FB) inverter with a hybrid commutation technique designed to reduce the harmonic distortion caused by the loss of the controller capability around the zero-crossing point in the unipolar commutation region. The hybrid modulation changes from unipolar to bipolar commutation under the loss of the reference control, improving the robustness and efficiency of the method. The commutation technique improves the switching performance and reduces the switching losses. Simulation models are developed in MATLAB/Simulink R2023b to evaluate their performance under different operating conditions. The results show that the proposed commutation technique can achieve high efficiency, low total harmonic distortion (THD), and fast dynamic response. The experimental implementation of sliding mode control (SMC) implemented in an STM32 microcontroller confirms that the hybrid commutation technique can reduce the THD by 0.96 percentage points for local (off-grid) loads and up to 2.45 in an industrial grid-tie network, compared with unipolar commutation. These findings highlight the potential of the proposed modulation technique for applications like solar panels and offer crucial insights for ongoing research and development in this field.
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页数:21
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