a double update pwm method to improve robustness for the deadbeat current controller in three-phase grid-connected system
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ID: 210400
2018
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Abstract
In the grid-connected inverter based on the deadbeat current control, the filter inductance variation and single update PWM affect the distortion of the grid current, stability, and dynamic of the system. For this, a double update PWM method for the deadbeat current controller in three-phase grid-connected system is proposed, which not only effectively decreases the grid current distortion and control delay, but also improves the system stability and dynamic response speed due to reducing the characteristic root equation order of the closed-loop transfer function. The influence of the filter inductance deviation coefficient on the system performance is analyzed. As a conclusion, the corresponding filter inductance deviation coefficient in the system critical stability increases with increase in the parasitic resistance of the filter inductance and line equivalent resistance and decreases with increase in the sampling frequency. Considering the system stability and dynamic response, the optimal range of the control parameters is acquired. Simulation and experimental results verify the effectiveness of the proposed method.
| Reference Key |
yang2018journala
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|---|---|
| Authors | ;Ling Yang;Yandong Chen;An Luo;Kunshan Huai;Leming Zhou;Xiaoping Zhou;Wenhua Wu;Wenjuan Tan;Zhiwei Xie |
| Journal | Molecular diversity |
| Year | 2018 |
| DOI |
10.1155/2018/2972379
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| URL | |
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